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Research of Distortion Current Detection Method and Compensation Current Control Method

Author: WangQingBiao
Tutor: LiDongHui
School: Tianjin University
Course: Control Theory and Control Engineering
Keywords: Distorted current detection Adaptive linear neurons Recursive integral PI Fuzzy Control
CLC: TM76
Type: Master's thesis
Year: 2007
Downloads: 94
Quote: 1
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Abstract


Active power filter as an ideal suppress harmonics and improve the power factor of the device to the nonlinear load current harmonics , reactive , negative sequence and zero-sequence current dynamic compensation to make up for the passive filter lack of control , and thus attracted widespread attention . Active power filter , two key issues : First, the real-time current distortion in the nonlinear load current , accurate detection ; compensation current detected precise control . Compare the distorted current detection method based on an algorithm that is simple , real time , distorted current detection method based on adaptive linear neuron adaptive ability , and expand the application to phase circuit . Using MATLAB M-file their simulation study , the simulation results prove that the the distortion current detection method is fully consistent with real - time active power filter , accuracy requirements . Compensation current control is a core part of the active power filter . Traditional PI control method of the cycle deficiencies of the distorted current tracking control , this paper, an improved method of fuzzy recursive integral PI control method combining fuzzy control and recursive integral PI control , in order to improve the system dynamic and steady-state performance . Created using MATLAB / Simulink simulation model and a simulation study , the simulation results show that the system has a small steady-state error and good dynamic performance , the filtering effect is better than conventional PI control method . In addition, the design of a DSP-based three-phase shunt active power filter , preliminary design of the hardware and software of the system .

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CLC: > Industrial Technology > Electrotechnical > Transmission and distribution engineering, power network and power system > Power system automation
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