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

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225 articles

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...

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...

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...

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....

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,...

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,...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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)....

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...

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...

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...

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...

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...

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...

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...

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...

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...

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....

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...

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...

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...

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,...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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....

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...

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...

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...

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...

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...

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...

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...