Proceedings of the 2015 International Power, Electronics and Materials Engineering Conference

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225 articles
Proceedings Article

Research and Development on the MPPT Intelligent Control Device for WPVC Power Generation System

Zhongnian Li, Lei Zhou
A new type of  WPVC(Wind PhotoVoltaic Complementary) power generation system is researched & developed, the system performance-cost ratio is high, the"D/D/D"(Direct-current/Direct-current/Duty-ratio)-"D/D/ D"(Direct-current /Direct-current/ Duty-ratio) MPPT (Maximm Power Poin Tracking) intelligent control...
Proceedings Article

Optimal Design of Adaptive Eigen-beam Beamforming in Electronic Sentinel System

Tielin Liu, Cheng Zhang, Lizhen Zheng
Eigen-beam beamforming technology is a kind of theory to achieve the demanding beam pattern using the linear combination of soundfield decomposition based on plane wave decomposition theory. The eigen-beam beamforming technology is analyzed and the array optimization is reformulated as the beamforming...
Proceedings Article

The Exploitation of Microcomputer Processing System to the Meteorological Satellite Images Based on the Remote Sensing Physical Technology

Gaofeng Pan, Chuyan Li, Ying Zheng
Meteorological satellite images are very important in meteorology, and they have a clear reflection to the process of the weather’s dynamic changes. Remote sensing technology can give the detection and identification to the objective, and it has the effective identification to the weather pictures. In...
Proceedings Article

Applied Research on Combination of Real-time Farmland Data Acquisition System and Crop Model

Sun Kaimeng
According to the study of the practice, description has been given to the crop simulation model and its data acquisition situation, the composition of real-time farmland data acquisition system, as well as the combining point of using both, focusing on the impact of real-time farmland data acquisition...
Proceedings Article

Influence on Sales Channels of Supply Chain Structure under Power Balance

Dapeng Yang, Meidan Xiao, Mingyang Chen
This paper considered a supply chain system with two manufacturers, each producing a single substitutable product. The products are sold through the common retailer or the manufacturer’s online sales channel. The purpose of this paper is to analyze the equilibrium pricing strategy and profits under different...
Proceedings Article

Rejection Of Direct Blast Interference Based on Vector Sensor adaptive Array Processing

Yunfei Chen, Bing Jia, Zhenshan Wang, Feng Gao, Sheng Li, Guijuan Li
In bistatic acoustic scattering wave testing, there will be strong direct blast interference , An algorithm based on vector sensor adaptive signal processing that rejecting of direct blast interference in bistatic sonar has been studied, through computer simulation the effectiveness of this algorithm...
Proceedings Article

Analysis of Ocean Reverberation Characteristics Based on the Vector Hydrophones

Bing Jia, Yunfei Chen, Yang Zhang, Feng Gao
Focusing on the disturbance of ocean reverberation in active sonar detection, this article researched the characteristics of vector ocean reverberation when vector hydrophones were the receivers. By experiments and theoretic analyses, scalar and vector ocean reverberation was gained when transmitting...
Proceedings Article

Research and Application of Image De-noising in military

Yu Feng, Jiawei Feng, Lin Deng
In order to hit the target accurately for military missile, its target image must be accurate. However, in practice the target image often encounter noise. Therefore, it is very important of image de-noising, and it has become a key step of the digital image pre-process. In this paper firstly we discuss...
Proceedings Article

Research on Complex Network Algorithm Optimization Community Detection Problem

Zhiqing Zheng
The community structure is one of the most universal and important attributes of complex network, and the community division research of complex network is to reasonably divide the community structure practically existed in the complex network. Apply the thought and theoretical method of supernetwork...
Proceedings Article

The Sentiment Analysis in Opinion Mining of Web News Comments

Qing Du, Fen Guo, Jiangxing Wang
Opinions’ analysis on web news comments is a great significance for the construction of the government's democratic politics, public opinion monitoring and decision support, etc. In this paper we analyze user’s opinion from emotional word, emotional word qualifier, and emotional tendency. We proposed...
Proceedings Article

Application of IEC61850 Protocol in Smart Substation

Huiqing Zhu
This paper introduces the content and characteristics of IEC61850 standard, and the basic knowledge about the model of layered structure and the configuration files. In addition, the application skills of IEC61850 standard in a project are presented via the example of the SCD documenting and configuration....
Proceedings Article

The design of LED fish gathering lamp PC free multipoint photometer

Xianghong Kong, Kexiang Lu, Xinlei Ji, Xiang Pan, Weiguo Qian
Given the problems of testing work-load is great, data is inaccuracy and etc in the process of fish gathering lamp light illuminance testing, this article designs and proposes a efficient and fast testing way to fish gathering lamp light illuminance—LED fish gathering lamp wireless synchronous multipoint...
Proceedings Article

A Design and Application of RFID Gantry

Quan Gang Wen, Yongbing Xu
The warehouse management mainly consists of the processes of warehouse entry, warehouse delivery, storage moving and inventory verification. In traditional warehouse management, bar-code technology is widely used while the RFID becomes more and more popular in the modern warehouse management. By contrast,...
Proceedings Article

The Efficiency Optimization of Permanent Magnet Synchronous Machine DTC for Electric Vehicles Applications Based on Loss Model

Like Zhao, Xiaomin Zhou, Dawei Gao
An efficiency optimization method of permanent magnet synchronous machine for electric vehicles applications is researched. Considering iron loss equivalent resistance and direct torque control scheme, the relationship of stator flux and power loss is derived based on loss model. And then the real-time...
Proceedings Article

The MMI design based on the Nucleus System

Chen Song, Ligang Hou
With the rapid development of computer science and technology, embedded system as a new area of computer application, with its simple, efficient and so more and more people pay attention, Nucleus as a typical embedded operating system, with small, powerful, easy to customize and other characteristics,...
Proceedings Article

Design of high-accuracy decimal frequency divider with Verilog-HDL

Shaowei Ma, Baolu Guan, Ligang Hou
This paper presents a more complex algorithm with Verilog-HDL, which based on the dual-modulus preseted decimal frequency divider. This algorithm can not only increase the accuracy of decimal frequency divider. , but also can be used to divide a clock. Simulations are conducted to analyze the characteristics...
Proceedings Article

Dynamic Voltage/Var Sensitivity Approach for Improving Fault-induced Voltage Delayed Recovery Problems

Yue Zhang, Xiaoming Li
A dynamic sensitivity method is proposed to evaluate the impact of generators’ reactive power on the recovery of key bus voltage in a system post-fault dynamic duration to improve the problem of delayed recovery voltage. Voltage delayed recovery existed in actual power grid is simulated on Guangdong...
Proceedings Article

Current Direct Control Simulation of Tri-level SVG Based on the Instantaneous Reactive Power Theory

Zhengrong Jiang, Hesong Liu
In the design and operation in the field of ac power, reactive power is an important factor to consider. Reactive power in the power generation, transmission and distribution of three parties is extremely important, and it is also very important for the normal operation of the load. Based on SVG basic...
Proceedings Article

The study of dynamic capacity-increase online monitoring device of transmission lines based on the beidou satellite accurate time service technology

Yuehua Huang, Denghao Fu, Yu Zheng, Yu Liu, Chuang Li
Because the static heat capacity is set up on the low probability of occurrence of adverse conditions,this results in the waste of line transmission capacity.This article describes the technique of dynamic Capacity,beidou satellite accurate timing Technology is added to the dynamic capacity-line monitoring...
Proceedings Article

The Design of a New Photonic Crystal Splitter

Kun Yang, Xin Sui, Dawei Wang, Zhou Qu
This paper designs a new kind of photonic crystal splitter. This kind of beam splitter is designed on the basis of the radiant photonic crystals. For improvement points beam splitter transmissivity and joined the tetragonal autocollimation photonic crystal structure. By increasing the autocollimation...
Proceedings Article

Cloud Adaptive Chaos Particle Swarm Optimization Algorithm for Economic Load Dispatch of Power System

Zhucai Qin
A cloud adaptive chaos particle swarm optimization algorithm is proposed for economic load dispatch problems of power system, which has the characteristics of nonlinear, non-convex and discontinuous. Normal cloud generator was used to adaptively adjust the inertia weight of each particles, so as to optimize...
Proceedings Article

A track and hold circuit

Rongbin Hu, Yonglu Wang, Xiaoying Zhang
A track and hold circuit is introduced, which includes a input buffer, a unit gain amplifier, a sampling switch, a current source, a driving NPN transistor and a over-driven protecting circuit. The over-driven protecting circuit is introduced to prevent the transistor of sampling switch from getting...
Proceedings Article

An amplifier-sharing technique for pipeline ADCs

Rongbin Hu, Yonglu Wang, Zhenpin Zhang, Xiaoying Zhang
An amplifier-sharing technique for pipeline ADC is introduced, which share a common residual amplifier between two adjacent MDACs. The circuit and work principle are given in detail. Besides the amplifier-sharing, the comparators are also shared by proper clock schedule. The measurement shows that the...
Proceedings Article

The Comprehensive Evaluation Model of Low Carbon Benefits of the Power Planning and Its Application

Xiaohui Zhang, Xuewei Ren, Jiaqing Zhong
Analyze the formation mechanism of low carbon benefits of the low carbon power, and combine the economic and low carbon characteristics of a low carbon power by using the low carbon economic factors, redefine low carbon benefits of the power planning and form a comprehensive evaluation model of low carbon...
Proceedings Article

Reverberation chamber simulation system research on radar battlefield electromagnetic environment

Yuying Liang, Peng Tu, Zhuangzhi Han, Hao Wang
In order to realize the radar electromagnetic environment simulation, improve radar system combat effectiveness. A simulation system based on reverberation chamber concentrating on radar electromagnetic environment was proposed. The system was made by three processing center. According to the measured...
Proceedings Article

Method for Realization of Number Estimation Subsystem of Netted Radar Emitter Signals

Xu-de Cheng, Bing Xu, Hong-li Wang, Wei Liu
Based on the modern battlefield electronic reconnaissance, a realization method of netted radar signal sources number estimation subsystem is presented. The cyclic correlation function of linear FM signal is deduced in this paper, and the function is used to estimate the number of signal sources. This...
Proceedings Article

The Method for Fault Diagnosis of Electric Actuator for a Type of Self-propelled Rocket Launcher Based on the Fuzzy Clustering

Bing Xu, Hong-li Wang, Han- Bing Wang, Fu-Li Liu
Fuzzy theory is a forceful analytic tool to the faulty diagnosis of complicated system. A fuzzy clustering method is introduced on the basis of original fault diagnosis. The initial sort is acquired by fuzzy equivalent matrix and F-statistic, and the initial iterative matrix for the fuzzy c-means is...
Proceedings Article

Application of Modified ART1 Neural Network in Aero-engine Fault Diagnosis

Hong-li Wang, Bing Xu, Yuan Zheng, Xue-dong Xue, Kan Cheng
According to principles of aero-engine fault diagnosis and flight data,this paper introduces a fault diagnosis method based on reformative ART1 neural network.After data pretreatment,it uses four-circumscription and quadratic-estimation to build fault codes and eliminate inveracious fault,and also ameliorate...
Proceedings Article

PCA-PSO-BP Neural Network Application in IDS

Lan Shi, YanLong Yang, JanHui Lv
BP neural network has two disadvantages, one is to fall into local minimum value easily; the other is the slow convergence. We propose in this paper an approach, including three main operations. Firstly, the algorithm of particle swarm optimization (PSO) is applied to improve back propagation (BP) neural...
Proceedings Article

Theoretical Study on the Potential Energy Surface of Decarbonylation of the Acetaldehyde by Ni2+

Haixia Yang
Density functional theory (B3LYP) calculations has been carried out to explore the potential energy surface (PES) associated with the decarbonylation of acetaldehyde by Ni+2. The mechanism leading to the loss of CH4 and CO is analyzed in terms of the topology of PES. The structures and energies of the...
Proceedings Article

Microwave reflection and transmission characteristics through plasma slab based on PLRC

Jinzu Ji, Yunpeng Ma
he piecewise linear recursive convolution (PLRC)is proposed for cold plasma medium using finite-difference time-domain (FDTD) method. In PLRC algorithm, the electric field with time is piecewise interpolated and the recursive convolution was introduced. The reflection and transmission coefficients were...
Proceedings Article

Study on Corrosion Behavior of Rebar HRB335 in NaCl Solution

Ping Li
The corrosion behavior of rebar HRB335 in 0.5 wt.%, 1.5 wt.% and 3.5 wt.% NaCl solutions was investigated by corrosion rate calculation and corrosion morphology observation. The results showed that, with the increase of corrosion time from 240h to 720h, the corrosion rate of rebar HRB335 in each NaCl...
Proceedings Article

A Novel Photovoltaic Off-grid Inverter Based on Boost Converter

Ling Mao, Jing Chen, Yi Deng, Cong Wang
Isolated DC/DC converters have the disadvantage of inefficiency, instability, magnetic bias and shoot-through problems, etc. They also influence the other electrical devices severely in the same power network. Therefore, a novel photovoltaic off-grid inverter based on the boost converter is designed...
Proceedings Article

A Three-stage Charging Method for Battery in Photovoltaic Power System

Zixin Xiang, Jing Chen, Yi Deng, Youxin Yuan
The battery is important storage device in the photovoltaic power system. To reduce the investment cost and to prolong the service life of battery, a three-stage charging methord for battery in photovoltaic power system is presented in this paper. The simulation model of the battery charging system has...
Proceedings Article

Hardware Design of Dynamic Reactive Power Compensation Control System

Yi Tu, Jing Chen, Youxin Yuan, Xuesong Zhou
The composite power loads largely need the reactive power. It leads to the decrease of power factor in power grid. The traditional static reactive power compensator is difficult to provide the reactive power compensation for the composite load reactive. Therefore, a dynamic reactive power compensation...
Proceedings Article

Monitoring Software Design of Passive Dynamic Filter

Yuanhu Xia, Jing Chen, Youxin Yuan, Ruiwuan Li
The objective of this work is to design the passive dynamic filter monitoring software. Recently, more and more non-linear loads are connected to the power grid, the distortion of the voltage or current waveform is caused by the serious harmonic pollution. The power harmonic not only does harm to the...
Proceedings Article

Simulation of Dynamic Reactive Power Compensation Device Based on Variable Reactance Converter

Mengjie Tu, Youxin Yuan, Jing Chen, Ying Tan
In the power system, the reactive power causes low power factor and power loss. The reactive power compensation device can ensure normal and stable operation of the power system. The traditional reactive power compensation device is difficult to meet the needs of high power factor and low power loss....
Proceedings Article

Research on Inductance Converter Based on IGBT for Dynamic Reactive Power Compensation Device

Ziwei Wang, Youxin Yuan, Jing Chen
In power system, a large number of the inductive loads need the reactive power. These loads always make dramatic voltage fluctuation in power system. The traditional static reactive power compensator is difficult to meet the needs of the adjustable reactive power capacity .Therefore, a dynamic reactive...
Proceedings Article

Simulation of Improved Autotransformer Step-down Starter

Wei Wang, Youxin Yuan, Jing Chen, Yaokun Li
The autotransformer step-down starting is characterized by the large impact current and the small short-circuit impedance of autotransformer. Therefore, the improved autotransformer step-down starter is presented in this paper. The following works have been done in the study: topology structure of the...
Proceedings Article

Numerical simulations of hydropower station plane steel gate

Jinbo Liu, Hongming Zhang
Plane steel gate is widely used in hydropower station. In this paper,by using the large-scale general software UGNX and ABAQUS, the ecological plugging gate model of a hydropower project and the model without hole for finite element is established. Considering the gate gravity, hydrostatic pressure,...
Proceedings Article

Numerical investigation of thermomagnetic convection of electrically conducting fluids under an inclined magnetic field using lattice Boltzmann method

Nan Xie, Changwei Jiang, Yihai He, Ming Yao
In the present work, natural convection in a square cavity filled with an electrically conducting fluid has been numerically investigated in the presence of an inclined magnetic field using lattice Boltzmann method. The vertical walls of this two-dimensional cavity are heated differentially while the...
Proceedings Article

A Novel Passive Dynamic Filtering Method of Composite Electrical Load

Weiping Fu, Youxin Yuan, Jing Chen, Qijian Chen
The use of non-linear and time-varying electronic devices, such as rectifiers and inverters, makes the current waveform of the grid seriously distorted. The harmonics generated by those devices have bad effects on the generation and transmission of electric energy. To deal with these problems, a novel...
Proceedings Article

Study on Microstructure and mechanical properties of Cold Spraying Al coating on Magnesium Alloy

Yuliang Liu, Xiangli Li, Qing Zhang, Chunhua Xu
Al coating is formed on AZ31 magnesium alloy by Cold spraying. plane and cross-sectional microstructure of cold spraying Al coating are investigated. The results show that Al particles are deformed significantly compared with original particles and Al coating is well bonded with the substrate. The microhardness...
Proceedings Article

Timing for an Integrated Accelerograph EDAS-AS with GPS and NTP

Chaoyong Peng, Bing Xue, Jiansi Yang
In order to solve problems of “jump second” when using only GPS for timing service and inconvenience of installing GPS antennas in some places, we propose a new algorithm combining GPS and NTP to adjust the local clock of an integrated accelerograph. The process flow of the method was described in detail,...
Proceedings Article

Adhesion of diamond film on functionally gradient WC-10wt. %Co hardmetal

Yigao Yuan, Jianpeng Li, Weiquan Sun
Diamond coated tools of cemented carbide substrate with high Co content are extremely useful for machining difficult-to-cut materials. However, it is very difficult to deposit a well-adherent diamond coating on WC-Co with high Co content because of the strong catalytic effect of Co. In this work, a new...
Proceedings Article

Experimental study of the mixed mode notched crack transformation propagation in 06Cr19Ni10 austenitic stainless steel with consideration of the material orientation

Huifang Li, Zhenbei Wang, Lanqing Tang, Caifu Qian
In this paper, experimental study is carried out for the mixed mode notch-crack transformation propagation in 06Cr19Ni10 austenitic stainless steel with consideration of the material orientation. It is found that after initiation, the new formed crack grows in a direction perpendicular to the applied...
Proceedings Article

Research on Electric Field Optimization of 750kV Double-joint Strain Insulator String Fittings

Yan Xie, Mu Li, Changzheng Zheng, Zhe Mao
Double-joint strain insulator fittings are the main equipment substations. It is great significance for reducing its maximum electric field strength to avoid corona noise and to improve substation electromagnetic environment. Firstly double-joint strain insulator string fittings simulation model is given...
Proceedings Article

Dynamic Characteristics of Overhead Transmission Lines following Ice Shedding Based on Lagrange Equation

Fan Peng
Transmission line icing coating will lead to ice shedding when ambient temperature rises or the wind increases. It can cause serious security threat to the structure of the transmission line system. In the paper, based on the Lagrange Equation, the analytical dynamics equations of transmission lines...
Proceedings Article

Design of Intelligent Car Based on Single Chip Processor STC89C52

Xin Li, Qiang Xiang
Smart car is a kind of system which can precisely along the path of automatic driving mazes to the end point and return to the starting point accurately according to the optimal path, Under the effect of control system. In this paper, the hardware/software design and implementation of the intelligent...
Proceedings Article

Selecting and Setting of Protection Appliance for Factory Low-Voltage Power Distribution

Xiaoyan Huang
This paper discusses the features and applications of the low voltage circuit breakers and fuses, the correct selection and setting of protection appliance for plant power distribution system are analyzed, effectively avoid of the accident and the loss caused by improper selection and setting of low-voltage...
Proceedings Article

FPGA-Based Real-Time Electromagnetic Transient Simulation of Substation

Bingda Zhang, Xiong Chen
At present, Real-time digital simulation of substation play an important role in analysing the characteristic of the substation, testing relay protection equipment, and building substation training simulation system. In order to create a high degree of similarity with the actual substation, this paper...
Proceedings Article

Exact Wave functions of Time-dependent Mesoscopic LC Circuit with an External Power Source

Zhan-yuan Yan, Chun-qiang Li, Gao-qing Meng, Jin-ying Ma
Quantization of the mesoscopic circuit with an external power source has been studied in this paper. The exact quantum invariant and wave function of the time-dependent mesoscopic LC circuit with an external power source, has been obtained via the field invariant method. The auxiliary functions in the...
Proceedings Article

Influence of annealing temperature on microstructure and H2 sensing properties of Pd-doped SnO2 sputtered thin films

Yanbai Shen, Anfeng Fan, Dezhou Wei, Shuling Gao, Baoyu Cui, Lijun Jia
The influence of annealing temperature on the microstructure and H2 sensing properties of Pd-doped SnO2 sputtered thin films were investigated. The as-deposited film was amorphous and would crystallize to tetragonal SnO2 structure when the annealing temperature was above 350°C. The films were composed...
Proceedings Article

Calculation of Power Transformer Short-current Force

Hongkui Li
This research studies the magnetic field and forces on the windings of transformer due to short-circuit. Three dimensional finite element computation of three-phase power transformer is carried out. The model developed have been applied to power transformer and the results are verified experimentally....
Proceedings Article

The Application of CAN Bus in Intelligent Substation Automation System

Yuehua Huang, Ruiyong Liu, Peipei Yang, Dongxu Xiang
Aiming at the defects of CAN bus real-time communication in substation automation system, this paper introduces the application mode of CAN bus in the substation integrated automation system and the defect solution. This paper mainly implements the construction manner of CAN bus distributed network system,...
Proceedings Article

Simulation Study of Selected Harmonic Eliminated PWM Methods for Cascaded Multilevel Inverters

Song Li
Calculation switching angles online for Selected Harmonic Eliminated technology was achieved in this paper, using linear interpolation method and Newton-Laphson iteration method respectively. Firstly, change SHE nonlinear equations into algebraic polynomial equations, which is for seven-level inverter,...
Proceedings Article

A Novel Control Method of Dynamic Filter for Composite Power Load

Haiping Lin, Jing Chen, Shijie Deng
The working compound electrical loads are characterized by a large number of harmonics. It may pull down the voltage of the power supply network and influence the other electrical devices. Therefore, a control method of dynamic filter for the composite power load was developed. In this paper, a controller...
Proceedings Article

The Design of an Dispersion-compensating Photonic Crystal Fiber for Optical Transport Network

Hu Lei, Shuhua Yin
Due to the dispersion compensation characteristic exhibited by the Photonic Crystal Fiber (PCF), the dispersion compensation based PCF for compensating the G.652 fiber was designed in this research so as to meet the business demands of the fiber communication system. The dispersion compensation characteristic...
Proceedings Article

Design Phase Locked Loop Accuracy towards Femtosecond Magnitude

Wendi Liu, Hong X. Qian, Jun S. Huang, Qi Chen
This paper studies the frequency synthesis for precision time protocol clock generation circuit, and more particularly focused on a multi-rate phase locked loop structure for generating an output signal at a desired frequency with reduced jitter towards the magnitude of femtosecond. We proposed a unique...
Proceedings Article

Electromagnetic analysis and optimization of copper bar in foil winding transformer

Yan Li, Naisheng Liu, Longnv Li, Bo Zhang
In this paper, a novel overlapping approach between the copper foil windings and copper bar is presented. The electromagnetic field is computed and analyzed using three-dimensional (3-D) finite element method based on an actual SCB transformer with amorphous foil winding. The current density cloud of...
Proceedings Article

Analysis of Main Insulation Electric Field of SFPSZ9-150000/220 Power Transformer

Yan Li, Haoming Wang, Longnv Li, Bo Zhang, Naisheng Liu
Main insulation electric field of a 220 kV oil-immersed power transformer is calculated. First of all, the main insulation structure is divided into three regions and the corresponding simplified model is established using a two-dimensional axisymmetric calculation field; then typical paths and locations...
Proceedings Article

Calculation of Stray Losses and Temperature Distribution in Power Transformer Using Coupled Electromagnetic-Thermal Field Analysis

Xiuke Yan, Xiangdong Yu, Min Shen
In order to calculate stray losses and predict temperature distribution as accurately as possible in power transformer tank walls and other mental constructive parts, an analysis method of the electromagnetic-thermal coupling is presented. TEAM Problem 21 (P21-B, P21a-2, P21c-M1) are adopted to verify...
Proceedings Article

CAN Communication Interface Design Based On TMS320F2812

Na Fang, Hanlin Huang, Zhimin Deng, Yunbo Zhu
The article presents a design of CAN(Controller Area Network) communication system based on DSP TMS320F2812. It introduces the hardware circuit and software design methods in detail. The schematic diagram of hardware is shown as well as the program diagram of system receiving and sending data. This system...
Proceedings Article

Open-Circuit Fault Diagnosis Based on the Filter Inductor Voltage for Single- and Three-Phase Inverters

Xuebing Pei
In this paper a new diagnostic method utilizing the voltage across the output-filter inductor as diagnostic criterion is presented for the voltage-source inverters. This voltage can be easily obtained by adding a winding across the inductor, thus the sensor is needless and the diagnostic system is naturally...
Proceedings Article

Structure Optimization of Corrugated Aluminium Sheath of XLPE Power Cables for Longitudinal Water Resistance

Lei Li, Hui Tang, Xuan Shao, Tong Wu
In this work, in order to solve the problem of longitudinal water resistance for XLPE power cable, nine kinds of corrugated aluminium sheath with different embossing depths and pitchs were pressed by argon arc welding machine. Each sheath was cut into six equal parts to study lateral pressure. After...
Proceedings Article

A New Adaptive Current Protection Scheme for Distributed Systems with Distributed Generation

Wanxing Sheng, XiaoLi Meng, Jing Ma
An adaptive protection scheme using digital relays is proposed for the protection of the distributed systems. Firstly, the impact of distributed generators on protection coordination is discussed. Then, an adaptive protection scheme is proposed for distributed systems with distributed generation (DG)....
Proceedings Article

A Novel Adaptive Distance Protection Principle for Distribution System with Distributed Generators

Jianfang Li, Xiaohui Song, Jing Ma
The value setting of the traditional distance protection has become very difficult for the distribution system with distributed generators (DGs) owing to the randomness of the DG output power. This paper proposes a new adaptive distance protection scheme to solve this problem. Firstly, on the basis of...
Proceedings Article

Corrosion Resistance of MB8 Magnesium Alloy after Ultrasonic Impact Treating

Bolin He, Songsong Xia, Yingxia Yu, Zhaoxia Chen, Jianping Shi
MB8 magnesium alloy was treated by using HJ-III type ultrasonic impact treatment machine. The effect of ultrasonic impact treatment parameters on the microstructure, residual stress in the surface and corrosion resistance was investigated. The test results indicate that the grain in the treated area...
Proceedings Article

Literature Review of Fault Location Research for HVDC Transmission Lines

Wang-Qing Mao, Qi Yang, Shuang Zhang, Feng Gao, Yun-ting Song, Ming-Yu Yang
The HVDC line fault location methods at home and abroad are surveyed in this paper. Firstly, the disadvantage of the existing fault location techniques of HVDC transmission line is analyzed, and it points out that the engineering applications of fault location based on traveling wave principle is most...
Proceedings Article

Static Voltage Stability Analysis of Power System Using the Combination of P-V Curve and the Modal Analysis

Wang-Qing Mao, Qi Yang, Ming-Yu Yang, Shuang Zhang, Feng Gao, Yun-ting Song
Acorrding to the poor effect of traditional voltage stability method in the actual power network, a new method, combination of the P-V curve and modal analysis, was put forward. First, Kp(power reserve coefficient) was calculated to measure the power system static voltage stability margin through P-V...
Proceedings Article

Effects of High Pressure Heater Splitting to Heat Economy of Double Reheat Unit

Silong Xu, Jianmeng Yang, Jian Li, Boshuo Sun
At present, mankind is faced with serious energy problems, as the energy-hungry, power energy saving is significant. Compared with the traditional single reheat unit, using secondary reheat to further improve the thermal efficiency of the unit, and meet the requirements of the unit low pressure cylinder...
Proceedings Article

The Effect of 10kv Lines Reactive Compensation Switching Mode for the Loss Impact

Zheyuan Wang, Li Jiang, Moyu Li
10 kV lines reactive compensation of the rural power distribution network can effectively decrease the loss, improve power factor, improve the voltage quality. 10 kV lines automatic switching control of reactive power compensation devices, are usually classified as according to the voltage switching...
Proceedings Article

Active Distribution Network Bifurcation and Voltage Stability Research

Xianbin Dai
It analyzes the common bifurcation categories in active distribution network; based on the active distribution network's wind field system model, it changes the reactive power parameters of its load model and conducts studies on the influence brought by reactive power on voltage stability based on bifurcation...
Proceedings Article

Semi-infinite Domain Artificial Boundary Conditions in Dynamic Analysis

Dan Ye, Yijia Sun, Yawei Li, Kexing Guo
The problem of wave propagation in a semi-infinite medium and its interaction with the structure was awalys encountered in the engineering numerical simulation.Artificial boundary conditions of truncated place in semi-infinite domain is the key to ensure accuracy of the calculation results.Adopting fixed...
Proceedings Article

Space Vector PWM for Three Series-Connected Permanent Magnet Synchronous Motors Drive System

Hua-qiang Zhang, Xiao-tong Lu, Xin-sheng Wang, Xue-yi Wang, Yan-li Leng
Since multiphase machines have more additional degree of freedom than three-phase machine, which can be utilized to control other machines, a number of machines can be controlled independently. The stator windings of the machines can be series connected by an appropriate phase transposition, with the...
Proceedings Article

Engine Control simulation Research of DRM-PCS

Kejun Jiang, Ren He, Yan Zhang, Kuiyang Wang
Double Rotor Motor Power Coupling System (DRM-PCS), as a new kind of power coupling system, can be used in hybrid electric vehicle to make the engine operate efficiently by decoupling the engine speed from the wheels. In this paper, the thought and method of the engine optimal control are put forward....
Proceedings Article

Ballistic Characteristics of Rocket Projectile with Deflection Nose

Yongjie Xu, Zhijun Wang, Guodong Wu, Jianya Yi, Shouli Pan
Deflection nose is a new concept of fast response control mode, partial nose of projectile can deflect certain angle relative to the axis of projectile body and pressure difference emerges in the windward and leeward side of warhead then generates aerodynamic control force, and this control way has high...
Proceedings Article

Static Experiments Research on Multi-Layer Steel Plate Isolator

Hui Yan, Lu Zhang, Guanghao Dai, Hongyuan Jiang
This paper developed multi-layer corrugated steel plate isolators in order to meet the needs of isolation in marine power systems, and the main parameters which affecting the performance of corrugated steel plate isolator are studied through the static experiments. The experimental results show that...
Proceedings Article

Simulation and Analysis of the Combined Power Process of LNG Cold Energy Recovery for Electricity Production

Ping Wang, Shuang-shuang Lv, Sheng-qiang Shen
The model of LNG cold energy recovery consisting of a Brayton cycle and a Rankine cycle is constructed in Aspen Plus. The effects of the inlet and outlet pressure of the turbines, ammonia-water flow rate, condensing temperature and the compressor outlet pressure to the thermal efficiency of the combined...
Proceedings Article

An Experimental Study of Sensor-less Fault Diagnosis on Rolling Bearing of Wind Turbine Generator System

Xianjiang Shi, Jiankun Zhang, Heng Du, Jingchun Zhang
This paper study sensor-less fault diagnosis on rolling bearing of wind turbine generator system, by means of establishing an experiment that can simulate doubly fed wind power generation system, on basis of the mathematical model that reflects magnetic flux density impacts on the electrical signal,...
Proceedings Article

Fault Diagnosis Simulation Model Study of Wind Turbine Drive Train Based on SIMULINK

Xianjiang Shi, Heng Du, Jingchun Zhang, Jiankun Zhang, Junshan Si
In order to study the response characteristics of the wind turbine drive system gear fault in its electrical signal in the stator theoretically, on the basis of considering the gear mesh stiffness change and simulating the broken gear fault characteristics, building the gear vibration dynamics differential...
Proceedings Article

Simulation of Viscous Dissipation on Forced Convection Heat Transfer In Porous Medium

Xingwang Tian, Ping Wang, Shiming Xu, Zhenhua Sun
Based on Darcy-Brinkman-Forchheimer flow model, this study analyzed the viscous dissipation effect on the forced, fully developed convection heat transfer in the flat channel filled with saturated porous medium of power-law fluid. Moreover, it derived the dimensionless calculation formulas for the axial...
Proceedings Article

Study on the prediction methods of aero engine fault parameters

Dewang Li, Dongxiang Jiang
This paper uses the least squares method, BP neural network and gray GM(1,1) model for trend forecasts and predicting the remaining life of the aero-engine fault parameters. By comparing the results of the three methods, the least squares method and BP neural network method predicting results are more...
Proceedings Article

Research of Doubly Fed Induction Wind Power Generation System Control and Experimental Platform Based on DSP

Tiantian Xu, Dongdong Li
This paper studied doubly fed induction wind power generation system and modeld its wind turbine and generation. The vector control algorithem was proposed to conduct MPPT (Maximum Power Point Tracking) strategy. An experimental platform was built based on DSP of TMS320F28335 series.The experimental...
Proceedings Article

Screening Method Research on Main Water Polluters of Liao River in Liaoyang

Xiang He, Fan Wang, Runlei Cai, Xuejiao Feng
The water polluters of Liao river in Liaoyang is elected preliminarily basing on the basin of the key water polluters of Liaoyang city, combining with the principle of polluters screening and the computing method of equal standard pollution load, optimizing and assessing the indexes which involves the...
Proceedings Article

Coordinated Restraining of SSO via SSDC and SEDC in hybrid AC-DC System Containing MMC-HVDC

Shupeng Li, Zhenyu Xu, Yuchao Qiao
In this paper, aiming on the sub-synchronous oscillation (SSO) of hybrid AC-DC transmission system which contains modular multilevel converter based High Voltage Direct Current (MMC-HVDC), the coordinated control of sub-synchronous oscillation damping controller (SSDC) and supplementary excitation damping...
Proceedings Article

A New Lightning Protection Method for Distribution Transformers

Xunjie Shi, Fangcheng Lu, Yujian Ding
The distribution transformers are easily damaged when struck by lightning, the reliability of power supply and distribution system as well as the operational safety will be affected seriously. Therefore, it is necessary to find out a relatively thorough lightning protection measure, to ensure the safe...
Proceedings Article

A Method to Forecast Photo-voltaic Power Outputs Based on Markov Chain

Hua Zhang, Xiaojuan Han, Jin-yue Dou
Large-scale grid-connected operation of photo-voltaic power station will influence the stable and economic operation of the grid. Effective forecast method of photo-voltaic power outputs is benefit for the whole scheduling and reasonable operating of the grid. A prediction method based on Markov chain...
Proceedings Article

The Effect of Adding Different Amount of Carbon Source on the Nitrogen Removal Efficiency of Tidal Flow Artificial Wetland

Xingguan Ma, Qiuju Zhao, Lei Wang
Based on the small trial of tidal flow artificial wetland, alkali-treated corn straw is used as carbon source supplement for denitrification. The author studys the effect of adding different amount of carbon source on removal efficiency of TN, NH4+-N, NO3--N, NO2--N and COD in the system. The results...
Proceedings Article

Experimental study of the effective indexes of refraction of ethyl red in ethanol solution as a nonlinear optical material

Shengwen Qi, Hongguang Lu
With the Z-scan method, the nonlinear optical properties of the sample of Ethyl red (ER) in ethanol solution (in which the content of ER is 1% by weight) were measured using the lasers of three wavelengths (441.6nm, 535nm and 633nm) respectively. As a result, the effective indexes of refraction n2 of...
Proceedings Article

Mechanism Simulation and Experiment of 3-DOF Parallel Robot Based on MATLAB

Ma Li, Dexue Bi, Zhipeng Xiao
Compared with the traditional serial robots, parallel robot has prominent features such as high rigidity, high bearing capacity, high precision, small error, low motion inertia and inverse kinematic solutions easily, which makes parallel robot widely used in light industrial automation production line...
Proceedings Article

Numerical Simulation of the Influence of Intake Grille Shape on the Aerodynamic Performance of a Passenger Car

Longwei Liu, Chang Jing, Xingjun Hu
The influence of the front intake grille shape on the aerodynamics of a passenger car is studied,and a numerical simulation is made on a full-scale CAD automobile model with different grille shapes, including straight, convex, concave, and M and W-shaped. The results show that the drag coefficient Cd...
Proceedings Article

Numerical Integration and Complex Trend Term Elimination of Acceleration Signal in Fault Diagnosis

Yi-zhou Yang, Dong-xiang Jiang
Acceleration signal is widely used in fault diagnosis of power machine, which can be numerical integrated to obtain displacement data. DC components and trend terms can’t be avoided in acceleration signal and it will be magnified during integration, causing distortion of the displacement waveform acquired....
Proceedings Article

Influence of Extraction Steam Pressure Loss on Exergy Economy of PWR Nuclear Power Plant

Shenglong Wang, Junpeng Li, Jun Ma
Reheat system of PWR nuclear power unit in use of steam reheat method.Heat recovery system and reheat steam system of PWR nuclear power units with strong coupling, so the impact of changes in heat recovery steam extraction pressure loss of nuclear power plants is more complex than thermal power.According...
Proceedings Article

A Method of Modeling of Security and Stability Control System Based on Virtual Relays

Guoyang Wu, Liang Yuan, Xinli Song, Yanjia Liu
Security and stability control systems (SSCSs) are effective measures to ensure the safe operation of power grids. A normal SSCS has a complex structure and is specific targeted. Therefore, it is difficult to model SSCSs accurately in large scale power system dynamic simulation. A new modeling method...
Proceedings Article

The application of unstructured grid in related numerical programming

Si Shen, Yan-ling Guan
In computational fluid dynamics programming, meshing quality determines the reliability of the results of numerical calculation. For numerical programming in heat and mass transfer of U-type ground heat exchangers (GHE) in ground source heat pump (GSHP) systems, considering the limitation of the structured...
Proceedings Article

Elastoplastic Analysis of Casing Stress in Thermal Recovery

Shimin Dong, Jie Yang
On the basis of the main thermal recovery wells casing damage characteristics, the temperature rise of the casing-cement is clearly defined by the simulation analysis of thermal recovery wells wellbore temperature field at the end of steam injection. Based on the theory of thick wall cylinder in the...
Proceedings Article

Wind Turbine Fault Diagnosis System Based on A Fuzzy Expert System

Wenguang Yang, Dongxiang Jiang
A fuzzy expert system which can simultaneously support many kinds of rules including fuzzy production rule, fault tree and decision tree in a unified framework are researched. Fuzzy rete algorithm is adopted to speed up the fuzzy reasoning chain. A wind turbine diagnosis expert system is developed based...
Proceedings Article

Wind-Photovoltaic-Storage Hybrid System Coordinated Optimal Control of Output Power

Hao Tian, Yutian Liu
For large wind-photovoltaic-storage hybrid system, in order to maximize the match between output of the hybrid system and the scheduling plan, it is very important to coordinate the output power of wind, photovoltaic and energy storage system. Taking the uncertain of wind, photovoltaic generation and...
Proceedings Article

Construction Technology Points of Large Diameter Bagged Concrete Bored Pile

Jiqing Zhong, Siyuan Ding, Yawei Li, Dan Ye
Large diameter bagged concrete bored pile has entered into the project practical stage as a new technology that guarantee the concrete durability in saline soil area, there is no construction norms, standards and test methods for large diameter bagged concrete bored pile at present. According to the...