The Simulation of Distribution Parameter of the Three-Phase D-Dot Voltage Sensor

2014 ◽  
Vol 556-562 ◽  
pp. 2123-2127
Author(s):  
Li Yun Zhu ◽  
Jin Gang Wang ◽  
Yu Yi Fan ◽  
Yun Jie Bai
Keyword(s):  
Equivalent Circuit ◽  
Dynamic Range ◽  
Circuit Simulation ◽  
High Dynamic Range ◽  
Voltage Sensor ◽  
Input And Output ◽  
Three Phase ◽  
Voltage Signal ◽  
Electrode Capacitance ◽  
Simulation Results

As an electric coupling sensor, the D-dot voltage sensor can achieve non contact measurement of voltage. With the advantages of simple structure, a high dynamic range and measurement bandwidth, it can meet the needs of accurate measurement[1][2]. Thus it has great application prospects in voltage on-line monitoring, relay protection or other fields in the power system. This paper considered the operation of the three-phase lines, and established the D-dot voltage sensor simulation model in the simulation platform of Ansoft Maxwell 3D. With the simulation of the sensor working conditions, we can get the distributed parameters of the system under three-phase lines in operation, construct an equivalent circuit of measurement and analyze the simulation results to get a voltage signal of input and output. The simulation results show that, with the equivalent circuit simulation of the three-phase D-dot voltage sensor, if we improve electrode capacitance parameter, there will be a good linear relationship between the input and output.

scholarly journals Electrical equivalent circuit for modelling permanent magnet synchronous motors

2021 ◽  
Vol 72 (3) ◽  
pp. 176-183
Author(s):  
Esra Kandemir Beser
Keyword(s):  
Permanent Magnet ◽  
Equivalent Circuit ◽  
Circuit Simulation ◽  
Electrical Circuit ◽  
Simulation Program ◽  
Mechanical Parameters ◽  
Circuit Element ◽  
Electrical Equivalent Circuit ◽  
Mechanical Part ◽  
Simulation Results

Abstract In permanent magnet synchronous motor (PMSM) models, only the stator part is given as an electrical circuit and mechanical equations are used for modelling the mechanical part of the machine. In this study, electrical equivalents of mechanical equations are also obtained and mechanical parameters of a PMSM are expressed as an electrical circuit element. In this way, an exact electrical equivalent circuit is proposed in which both the stator and the mechanical part can be modelled as an electrical circuit for the PMSMs dynamic model. Although PMSM model includes mechanical parameters and variables, the complete model is expressed only in electrical elements and variables. The proposed PMSM circuit was simulated for different load torques in the circuit simulation program. Simulation results show that the proposed circuit operates like a PMSM. Simulation results were verified by another method in the form of solution of the differential equations that constitute the mathematical model of PMSM. Due to the proposed circuit that enables the conversion of mechanical parameters into electrical parameters, PMSM can be modelled and simulated as an electrical circuit with completely electrical elements in a circuit simulation program.

The Comparison of PID Excitation Controller Stabilizing Terminal Voltage

2012 ◽  
Vol 203 ◽  
pp. 153-160 ◽  
Author(s):  
Yin Peng Qu ◽  
Guan Bin Huang
Keyword(s):  
Fuzzy Control ◽  
Control Theory ◽  
Nonlinear Control ◽  
Circuit Simulation ◽  
Short Circuit ◽  
Load Shedding ◽  
Voltage Step ◽  
Three Phase ◽  
Terminal Voltage ◽  
Simulation Results

In order to stabilizing terminal voltage of a generator, this paper designs two excitation controller improved from the PID based on nonlinear control and fuzzy control theory. Then, simulation results of three excitation controllers in SIMULINK are compared in different disturbance and faults such as terminal voltage step, mutant Load-shedding, one-circuit broken and three-phase short circuit. Simulation results show that: three excitation controllers achieve the goal that stability of terminal voltage is maintained. And PID +Fuzzy excitation controller has the better robustness than the others.

Three Phase Induction Motor Inverter Defects Diagnosis Using Voltage Spectrum of an Auxiliary Winding

2014 ◽  
Vol 672-674 ◽  
pp. 1244-1252
Author(s):  
Lamiaâ El Menzhi ◽  
Abdallah Saad
Keyword(s):  
Fourier Transform ◽  
Induction Motor ◽  
Time Domain ◽  
Phase Voltage ◽  
Voltage Inverter ◽  
Three Phase ◽  
Voltage Signal ◽  
Simulation Results ◽  
A New Technique ◽  
The Time Domain

In this paper, a new technique for diagnosing faults in three phase voltage inverter feeding induction motor is presented. It is based on the so-called the voltage spectrum of an auxiliary winding. For this purpose, expression of the inserted winding voltage is presented. After that, discrete Fourier transform analyzer is required for converting the voltage signal from the time domain to the frequency domain. Simulation results curried out for non defected and defected inverter show the effectiveness of the proposed method.

A Systematic Design Method for 3-D Grid Multiscroll Chaotic Attractors and Its Circuit Implementation Employing CFOAs

2015 ◽  
Vol 25 (03) ◽  
pp. 1550041 ◽  
Author(s):  
Xianming Wu ◽  
Yigang He
Keyword(s):  
Dynamic Range ◽  
Design Method ◽  
Circuit Simulation ◽  
Chaotic Attractors ◽  
Systematic Design ◽  
Active Device ◽  
Current Feedback ◽  
Active Devices ◽  
Current Feedback Operational Amplifiers ◽  
Simulation Results

A systematic design method for 3-D grid multiscroll chaotic attractors by using staircase nonlinear functions (SNFs) is proposed in this paper. Equations of parameters for 3-D grid multiscroll chaotic attractors are derived in the consideration of the dynamic range for the active device and the number of multiscroll chaotic attractors. 5 × 4 and 4 × 3 of 3-D grid multiscroll chaotic attractors are generated by this method. A chaotic circuit is designed only using current feedback operational amplifiers (CFOAs). The circuit consists of three integrators and two nonlinear circuits. The parameters of the circuit are calculated by the parameters of 3-D grid multiscroll chaotic attractors. The circuit can generate 3-D grid multiscroll chaotic attractors. The central frequency of the circuit is higher with fewer active devices and simpler circuit construction for the good frequency characteristic and port characteristic of the CFOA. Numerical simulation results and the circuit simulation results show that the method is feasible and the designed circuit is correct.

scholarly journals Performance Analysis of Three-Phase Controlled Rectifier in various Switching Angles

2019 ◽  
Vol 9 (1) ◽  
pp. 1959-1965
Keyword(s):  
Performance Analysis ◽  
Output Voltage ◽  
Phase Delay ◽  
Input And Output ◽  
Three Phase ◽  
Calculation Results ◽  
Output Side ◽  
Simulation Results

This paper discusses the performance analysis the characteristics of three-phase controlled rectifier parameters based on various switching angles. The phase delay method with various switching angles is employed to generate output voltage. Analysis of calculations is engaged to determine the various desired parameters. Voltage and current waveforms both input and output side are considered. The analysis are verified by simultion. The results show that the calculation results and simulation results are the similarly.

An Experimental Study on Compact Equivalent Circuit Modeling of SiC Schottky Barrier Didoes

2013 ◽  
Vol 740-742 ◽  
pp. 1093-1097
Author(s):  
Makiko Hirano ◽  
Tsuyoshi Funaki
Keyword(s):  
Schottky Barrier ◽  
Equivalent Circuit ◽  
Circuit Simulation ◽  
Power Conversion ◽  
Power Device ◽  
Circuit Modeling ◽  
Device Model ◽  
Equivalent Circuit Modeling ◽  
Simulation Results ◽  
Switching Characteristics

Circuit simulation is of assistance to design and evaluate a power conversion circuit. A compact and accurate power device model is indispensable for obtaining appropriate circuit simulation results. This paper studies the compact equivalent circuit modeling of SiC Schottky Barrier diode (SiCSBD) and evaluates the developed model in turn-off switching operation. Two SiCSBDs having different specification are modeled and evaluated in this paper. The results show that the switching characteristics of SiCSBDs can be modeled with the equivalent circuit, whose configurations and parameters are identified from static I-V and C-V characteristics.

Simulation for the Control Strategy of Three-Phase Boost-Half-Bridge (BHB) DC-DC Converter with Series Voltage Doubler Rectifiers through Three-Phase High Frequency Transformer

2013 ◽  
Vol 325-326 ◽  
pp. 533-537
Author(s):  
Amir M. Soomro ◽  
Shahnawaz F. Khahro ◽  
Xiao Zhong Liao
Keyword(s):  
Control Strategy ◽  
High Frequency ◽  
Power Balance ◽  
High Frequency Transformer ◽  
Input And Output ◽  
Three Phase ◽  
Voltage Doubler ◽  
Input Side ◽  
Simulation Results ◽  
Secondary Side

This paper presents simulation for the control strategy of three-phase boost-half-bridge (BHB) DC-DC converter with series voltage doubler rectifiers through three-phase high frequency transformer. The control strategy is consisting of three voltage loops. All the three voltage loops are independent of the input side and controls the input and output power balance from the secondary side of the high frequency transformers only. Moreover, the control strategy has been verified for its appropriate operation by simulating the above said configuration for the same turn ratios as well as for the mismatch turn ratios of high frequency transformers. Finally, the satisfactory simulation results for the proposed control strategy are presented.

An Interface Model for Accurate TSP-EMTP Hybrid Simulation of Power Systems

2013 ◽  
Vol 448-453 ◽  
pp. 2439-2446
Author(s):  
Shuai Zhao ◽  
Da Zhong Fang ◽  
Wei Li ◽  
Li Gang Zhao
Keyword(s):  
Power Systems ◽  
Equivalent Circuit ◽  
Transient Stability ◽  
Equivalent Circuit Model ◽  
Hybrid Simulation ◽  
Simulation Method ◽  
Interface Model ◽  
Three Phase ◽  
Simulation Results ◽  
Electro Magnetic

An interface model used in hybrid simulation of power system of transient stability program (TSP) and electro-magnetic transient program (EMTP) is proposed. In the hybrid simulation, the EMTP subsystem is modeled by time-variant real and reactive powers for the TSP simulation of the AC subsystem, and an active frequency depended three-phase Norton multi-port equivalent circuit model is used to represent TSP subsystem for the EMTP subsystem simulation. The interface model makes the hybrid simulation results more precise than those produced by traditional hybrid simulation method. Case studies on a modified IEEE 9-Bus and 3-generator and the 4-generator and 2-area AC/DC test systems demonstrate that the model can effectively improve the accuracy of system TSP-EMTP hybrid simulation both for symmetrical and unsymmetrical contingencies.

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