The functional architecture and overall design of the decision support system of urban distribution network planning based on electric power demand forecasting are introduced, with the focus on the function implementation and key planning results of the electric power demand forecasting module for the...

In this paper, a new frame beginning spinning position signal acquisition system is designed with reed sensors. Compared with the beginning spinning position signal acquisition device, the experiment proves that, the structure of the signal acquisition device is easy to adjust, stable and long usage...

This paper describes the design of control circuit which makes the TMS320LF2407 as the core. It mainly introduces the characteristics of DSP, the general development process of DSP system and the DSP chip TMS320LF2407’s characteristics adopted by this system. It focused on the peripheral circuit design...

since 1990s, the substation has entered the digital age along with rapid development of information control technology, power grid technology, computer technology and measuring technology, and a great breakthrough has been made in aspects of function improvement, cost reduction, reliability enhancement...

High-G accelerometer impact excitation using Hopkinson pressure bar was introduced. The impact excitation course was simulated on ANSYS/LS-DYNA using Lagrange's method and Johnson-Cook constitutive model. The effects of projectile nose shape, nose length, and adjustment pad material on acceleration waveforms...

According to the design requirement of the agricultural product intelligent logistics monitoring system, this paper uses integrate embedded technology to design a new intelligent logistics monitoring system based on GPS/GPRS. On this basis, this paper designs the GPS positioning module, RFID RF module...

According to the problem that traditional heart detection equipment is bulky and expensive, approach to designing and implementing portable heart sound detection instrument is proposed in this paper. After the heart sound signal is filtered and amplified by hardware circuits and FPGA, the SCM receives...

K-means fuzzy cluster analysis and matter element analysis have been used to select optimize points of water quality monitoring in Qinghe River, taking 8 monitoring section data in June 2014. K-means fuzzy clustering analysis method is suitable for the processing of continuous data set,and matter element...

This paper presents a new optimization approach for solving the economic operation with consideration of wind, solar, micro-turbine, fuel cells, battery and load in an energy system. Mathematical models of each micro source and the system model of the microgrid economic operation are established, and...

The paper design a Virtual Signal Generator based on Virtual Instrument,which can produce continuous adjustable amplitude and frequency signal .It’s contains of the most basic three waveform: sine wave, pulse wave and triangle wave. We design the signal generator by LabVIEW. Data acquisition is NIUSB-6009....

With the development of power electronic technology, it has become the main harmonic sources in the grid. This paper is based on the theory of induction meter and electronic energy meter. First the mathematical expressions of respective meter under harmonic are induced, and next the influence factor...

According to the actual demand of deformation monitoring for large buildings, the technology of laser image based on virtual instrument is put forward. The location of laser light spot relative to the reference position and the variation of tilt angle are measured, which can calculate the vertical deformation...

Deflection is an important indicator of bridge health. This paper puts forward a deflection measurement system for bridge based on laser image technology. In the measurement progress, the laser image is sampled, filtered and converted to binary image using threshold segmentation, which is used to coordinate...

It is important to segment prostate automatically in the daily treatment images. However, previous methods often ignore the previous segmented treatment images which contain valuable patient-specific information. To this end, this paper proposes a novel CT prostate segmentation method based on a random...

With more penetration of wind energy from onshore and offshore wind farms, wind generation will thus be exerting more influences on the original power system. The main purpose of this paper is to study two commonly adopted offshore wind turbine types, namely the doubly-fed induction generator and the...

For analyzing the effect of GEO(geostationary orbit satellite-GEO) Satellite Motion on Signal Performance in TWSTFT(Two-Way Satellite Time Frequency Transfer), the observation data of TWSTFT and GPS PPP(GPS Precise Point Positioning) which have the similar accuracy between the NTSC (National Time Service...

It has a very important role that emotion to coordinate the relationship between people in the numerous and complicated social life. Expression is the most important characteristics of emotion, it is indispensable means of information communication and emotional communication in interpersonal communication....

In order to improve the heating system’s intelligence and automation level, a wireless remote meter reading system is designed based on GPRS network technology. The system consists of heat meters, collector, concentrator and remote management centers. The hardware is constructed by STM32F103MPU, wireless...

Transformation equipment on-line monitoring device aims at monitoring substation equipment operation parameters. Through internal network, the data will be transported to the on-line monitoring platform of electric power internal network to provide maintenance basis for maintenance department. While...

Aiming at the existing problems such as heavy workload and low efficiency of intelligent substation state monitoring device calibration, combined with the current information technology and intelligent technology, his paper presents a vehicle-borne intelligent verification system. The system adopts vehicle...

Circuit breaker is a very important control and protective equipment in the field of grid system. When the electric equipment or circuit are in accident, the relay protection and circuit breaker will cut the fault section from grid rapidly and guarantee the grid running safely. However, there are a mount...

his paper studies the extraction of power line in aerial image based on the Hough transform method. In the detection of Hough transform, it is easy to be interfered by the noise, which leads to false detection. Considering the characteristic of power line in aerial images, we propose a set of threshold...

In the precision electro-hydraulic servo control system, grating is commonly used as displacement detecting element. To realize getting the data from the grating displacement sensor and send a command word rapidly, the dynamic link library (DLL) technology is used in this paper, it is that a dynamic...

Heavy rotating mechanical devices, such as ball mills in the mineral grinding process, produce strong mechanical vibration and acoustic signals. These signals consist of multiple components with different time scales and physical interpretations. Frequency spectra of these multi-scale sub-signals contain...

For the issues of feature extraction and scene recognition in the complex wireless transmission channel, this paper presents a feature recognition based on a "fingerprint library" algorithm. The algorithm is fully tap the different scenarios, differentiated features within the different regions of the...

This paper proposed a new RFID anti-collision algorithm on the basis of the frame slots of Multi-branched Tree.This new algorithm used for multi-grouped lies in the label prefix discrimination,which greatly prevents the situation that the frame length is not enough and reduces the transmission of bits...

For smoothing Wind-PV-Energy storage system output power fluctuation problem, this paper proposed Wind-PV-Energy storage coordinated control method based on variable weight self-adaption filter, considering the Wind-PV system volatility constraint conditions and the energy storage system SOC. With index...

With the arrival of the era of big data, wind power forecasting data develops to the massive and multi-dimensional direction. Single computer lack of resources is difficult to solve the problem of wind power forecasting. In this paper, Spark cloud computing platform is introduced to solve the massive...

In order to solve the problem of data security in smart grid wide-area measurement system(WAMS),this paper analyzes the characteristics of the existing data encryption solutions, and combines with the characteristics of massive data as well as high requirement of real time in WAMS, then introduces Storm...

In terms of the uncertainties and incompleteness of alarm information in power grid fault diagnosis, this paper proposes a fault diagnosis method based on rough set combined with Bayesian network. Using the ability of rough set to reduce knowledge and process indeterminate information and mine fault...

Routing protocol has been a challenging issue in the design of wireless sensor networks. This paper presents an improving LEACH protocol for heterogeneous wireless sensor networks. The new protocol consists of a number of rounds. The wireless sensor networks have some sensor nodes that have greater power...

We propose an unslotted CSMA with grouped sensing and analyze the throughput of SUs in multi-channel cognitive radio network. We model the system by 3-demensional continuous time Markov process, calculate the steady state probability of the system, and obtain throughput and transmission delay of SUs....

Protocol format reverse based on communication data has played an important role in the fields of network security and information countermeasures. In this paper, a format reverse analysis method for binary communication protocol which based on probability alignment and differential analysis of statistic...

A scheme for WSNs (wireless sensor networks) security is given by dividing sensing tetrahedron into clusters and using the symmetric polynomials in this paper. The sensing tetrahedron is divided into a number of small grids. All those sensor nodes, both ordinary sensor nodes and heterogeneous sensor...

The crushing effect of waste phone's circuit boards by mechanical–physical method under different pretreatment processes (without pretreatment, disassembling electrical components, heating treatment) was investigated. The composition, mass distribution, feature, liberation degree of crushed products...

Distributed antenna system (DAS) has emerged as a promising architecture for future mobile communications. Compared with collocated antenna system (CAS), DAS has advantages in reducing transmission power and improving the cell coverage area. In this paper, the downlink performance of DAS with linear...

This paper proposes a fireman positioning method based on RFID technology, which combined RSSI and TOF ranging in automatic positioning firefighters. When the system can't measure the distance due to various reasons, it will estimate the target location of the current based on historical data. The experimental...

In view of the nonlinearity and coupling in the coordinated control system (CCS) of thermal power plants, the paper introduces a Takagi-Sugeno (T-S) fuzzy model based generalized predictive control (GPC) of CCS. First, a T-S fuzzy model with three chosen typical operating point is employed to approximate...

This paper introduces a decentralized coordinated fuzzy stabilization control of power system. First, the Takagi and Sugeno (T-S) fuzzy model is employed to approximate system-wide nonlinear model of power system. Next, based on the fuzzy model, a fuzzy controller with decentralized constrain is developed...

The temperature of electrical machine is determined by the cooling effect and the temperature rise can affect the service life and the power rating of machines. Therefore, improving the method of cooling the machine has an important practical significance. In this paper, a 12-slot high speed PM machine...

The line loss is an important economic and technical index to evaluate electricity power enterprise production and management, according to the nature it can be divided into theoretical line loss and management line loss. Management line loss is caused by metering equipment error or by poor management....

We present a first-principles investigation of electron transport in graphene contact with Au electrodes. Using destiny function theory and a non-equilibrium Green’s function approach, we obtain the best transmission spectrum and current-voltage profiles for Au-graphene-Au contacting device. For this...

Metallic nanoparticles display unique properties that are quite different from those of individual atoms. In reality, the optical properties of the nanoparticles strongly depend on its shape. We present the electrostatic approach to evaluate scattering and absorption of different shaped nanoparticles...

n order to meet the structural and functional demands of power grid planning research simulation laboratory for application data processing, a set of application data subsystem serving the power grid planning research simulation laboratory is designed according to the actual demand of power grid planning...

As the power supply core for power consumers, the regional power grid is responsible for maximally absorbing new energy sources and providing reliable and economic electric energy to users, thus to become an important development link of modern smart power grid. In allusion to actual conditions of regional...

According to the problem that the intelligence is not high of the recognition of GIS PD types by SF6 decomposition components, using the real 110kV GIS platform, simulating two kinds of insulation defects PD of SF6 gas, and making the research on the change of the four kinds of gases of CO2?CF4?SO2F2,and...

Scope, modeling principle and methods of power distribution network equipment state control model are proposed after research according to actual needs of power distribution network equipment state control. Foundation model applicable to power distribution network equipment state control is tailored...

Standalone multi-element complementary microgrid plays a very important role in solving the electricity problems of many areas, which are rich in renewable energy but have problems in the power supply of traditional power grid. To ensure the reliability of power supply while improving overall economic...

The coupling interaction between multiple grid-connected inverters, inverters and grid in the clustered grid-connected distributed photovoltaic (PV) system can cause series and parallel harmonic resonance in the grid. The power quality of grid is seriously affected. Therefore, the resonance problem of...

To deal with the difficulties of getting network positioning signals existing in sensor network as well as the problem of the hunted signals being polluted by electromagnetic radiation, mechanism of hunting for sensor positioning signals based on correlator difference accumulative algorithm is proposed...

With the launch and implementation of the intelligent grid, the remote meter reading through power line carrier and GPRS wireless network has been widely deployed gradually. However, the wireless network based on SIM card is vulnerable to interference at present, the packet loss and drop occurring sometimes,...

In a navigation satellite system, the two-way satellite time and frequency transfer (TWSTFT) is mainly used for time synchronization at earth stations, and system time tracing, etc. The reason why the TWSTFT can realize high-precision time synchronization is its path symmetry; however, in practical applications,...

Power Euler-Lagrange(EL) mathematical model of three-phase three-switch Vienna rectifier is set up in synchronous rotation dq coordinate system based on its topological structure. According to power EL mathematical model and passivity of Vienna rectifier, passivity based power controller is designed...

Power transformers are key components in power distribution systems and ensuring transformer do not be destroyed in the earthquake is critical to the safe operation of power transmission grid. Finite element analyses of power transformer under the earthquake, dead load and wind load are described in...

With the constant expansion of Fuxin grid scale and the rapid development of wind farms, problems related with wind farms become increasingly prominent and voltage of wind farm is affected by changes in wind power active output and reactive output. This paper takes Fuxin area as example to analyze the...

With the construction of northern and western wind power base, large-scale regional wind power grid connection begins to affect power system and several power grid accidents in Fuxin grid resulted in partial off-grid in recent years, causing certain damages on the security and stability of power system....

Line loss consists of two parts: one is the unavoidable loss, such as the lost electric energy caused by resistance heating in the process of power transmission; the other is the avoidable loss, such as the excessive loss caused by the unreasonable power grid operation mode as well as the abstracting...

The analysis and record of data for traditional in-field calibration of electric energy meter relies on artificial work[1], which will easily lead to data error due to human factors and unable to realize standardization of calibration. The complete sets of mobile operation software for in-field calibration...

the advantages of the laser's monochromatic, bright, directional stability and coherence are good, and it is widely spread and applied in the field of precision measurement. In this paper, the method of laser phase distance measurement, based on the characteristics of laser ranging, has made a relative...

In power system, a large sum of harmonic produced by non-linear load will affect the loss of transformers. In the meanwhile, the traditional methods to measure the loss do not have enough adaptability. By analyzing the principle of one side measurement and two sides measurement methods, and making study...

The choice of the parameters of the secondary sound source which contain the number?position and strength is a key part in the design of active noise control system of power transformer. Countering the practical applications environment of noise control of transformer, acoustic radiation model in half-free...

In secondary path identification of power transformer Active Noise Control (ANC) system, the background noise regards as useful signal, which makes identification result can’t reflect the characteristic of secondary path and affect the stability and convergence of the ANC system. According to the actual...

An energy-saving de-icing technology of aircrafts with high efficiency and energy saving is discussed, which is based on the inverse piezoelectric effect. The finite elements analysis model of a testing skin is developed to analyze the natural modes and harmonic response by the software ANSYS, which...

Analyzing and dealing with massive data in time to provide proper and reliable data for advanced applications of substation is one of the main tasks of intelligent substation. This paper introduced the quality identify of multi-source data in detail based on the panoramic SCD model which intergrated...

Electricity production site operation and maintenance work and need to collect operation data, records information about a job, the widespread use of manual recording mode, even if the use of handheld terminal and the function is single. Based on electricity production site information collection method,...

With the development of mobile Internet technology, mobile applications will gradually replace the traditional equipment; become the mainstream of business applications. The operation of the pillar industries of electricity, will gradually realize the mobile application. The emergence and development...

In order to meet the needs of mobile inspection robot drives fast on flat road, and walks normally in the complex environment (roadside stone, grass, etc.). We designed a new mobile platform of robot with the wheel-track. The mobile platform used wheels to drive normally on flat cement road. If the mobile...

In accordance with the problems of phase selection method based on difference of phase-to-phase current, that is, phase selection mistake when double-phase ground fault occur and insufficient sensitivity of phase selection when the positive and negative sequence impedances of system are not equal, a...

According to the problem that a signal generator usually uses a lot of discrete devices which cost a large space and often designed to realize one function? such as sine wave for specified frequency. In this paper, the using of FPGA make the generator flexible and convenient. It uses PLL and DDS to make...

In this paper, we design a basic spectrum analyzer which can analyze the signal with the bandwidth in 10 MHz~100MHz and the minimum resolution in 100 KHz. We utilize the AD9854 DDS (Direct Digital Synthesizer), STM32F407, AD831, AD835 and the TFT LCD to design and implement a system that has menu-driven...

A new method of high-speed object detection using planar capacitive sensor was presented. The planar capacitive consists of two electrodes. A sine signal was applied on one electrode to form a quasi-electrostatic field and another electrode was use to detect the object signal. The voltage of the detecting...

This paper proposes a novel multi-sensor Bernoulli filter (MSBF) based on the finite set statistics (FISST) for tracking a single target under the presence of detection uncertainty and clutter. The proposed algorithm is an extension of original Bernoulli filter in multi-sensor tracking. First, FISST...

A closed-loop control algorithm has been developed for suppressing the vortex shedding of flow past a circular cylinder in an electrically low-conducting fluid (e.g. seawater). The intent is to avoid both vortex shedding and flow separation from the body, which is achieved through the introduction of...

To make the unmanned power substation perform independently and efficiently, the theory and structure of a real-time monitoring system based on audio recognition is introduced in this paper. It focuses on the monitoring and identification process of audio data. Firstly the audio signal of substation...

This paper is designed for wide input range of SerDes chip phase-locked loop circuit, using self-biased technology, there is a wide range of input reference frequency, the need for external bias circuit, and loop bandwidth can follow input reference frequency changes in noise with good inhibitory effect....

This paper examined HCL and H2SO4 Mixed Acid as the Supporting Electrolyte for Vanadium Redox Flow Battery. The results of Cyclic Voltammetry (CV) and electrochemical impedance spectroscopy (EIS) showed that the MAS sample had a better electrochemical activity than Pristine sample. At 20mAcm-2, VRFB...

This paper presents a new method for adaptive spectrum segmentation. In the field of wideband spectrum sensing, spectrum segmentation is regarded as the first procedure to detect sub-band signals. Wavelet Transform (WT) is sensitive to the rising and falling edges of signals in spectrum. Multi-scale...

Offshore wind power industry develop rapidly in recent years. Offshore wind has many advantages compared with onshore wind turbine. For example, it do not take up land and can make better use of the sea wind resources. However, the flexible components of wind turbines violent vibration will cause the...

In order to research the reliability of electric power communication network, this paper proposes a kind of vulnerability analysis method based on business. Firstly, it applies the improved fuzzy analytic hierarchy process to evaluate electric power business importance. Secondly, the business importance...

This paper proposes asymmetric cascaded multilevel inverter with unequal dc-link voltage ratio. Meanwhile, it’s proved when asymmetric topology with dc-link ratio of 1:2:4, the output voltage level can be maximized with the same number of devices. For this kind of topology, this paper designs the corresponding...

The regulation of earth resistivity and elastic wave velocity with the change of compaction degree under different moisture contents is studied by experiment. In addition, regression analysis is conducted on the relationship between compaction degree and soil resistivity and elastic wave velocity. Based...

This article discusses a new GNSS signal tracking architecture with a quasi-open tracking loop. Matched filtering is adopted for PRN code phase discrimination and FFT is used for frequency discrimination, which greatly shortens the duration of the pull-in step after acquisition. There is no loop filter...

This paper designs a low-cost embedded GPS/INS integrated navigation module ,using STM32 as control processing unit and the micro inertial measurement unit (MPU6050) as the sensor and GPS receiver. The GPS receiver is easily to be derived of navigation function because of the lock-loss when vehicles...

Reliability evaluation of the electric vehicle in the grid of random charging and discharging behavior is particularly important. To solve these problems, a mode is proposed in the time and space by their random behavior, probability density function based on the statistical analysis, and the bind distribution...

The accuracy and reliability of the main components of travelling wave natural frequency is the key of travelling wave in the fault location method based on the natural frequency. To avoid the problem that traditional algorithms rely on a single primary natural frequency are not reliable, a new method...

A novel ultra-wideband ( UWB) antenna is proposed in this paper ,which has a band-notched characteristic for the interference between the UWB applications and the IEEE802.11a wireless local area network (WLAN) and the WiMAX /C-band with combination of notched structures. The proposed antenna fed by coplanar...

The high voltage source of electrocurtain requirements for high power factor, high efficiency, output DC high voltage of low ripple, fast fault response. In order to improve the parameters to design a high voltage source which based on three-phase buck type PWM AC chopper. It has advantages of simple...

Electrical module is the control unit of oil and gas processing, so it must have the ability to withstand the impact of the explosion. By transient dynamic module of ANSYS, dynamic response of electrical module under explosion load is analyzed. The results show that the maximum stress and displacement...

Taking a certain type of photoelectric system of armored vehicle as an example, the influence of angular vibration on the optical system image quality is analyzed. Firstly, the paper introduces the characteristics of photovoltaic system and the basic theory of imaging; Then it uses the ZEMAX to build...