Research Of Active Power Filter Based On Micro-grid Harmonic Suppression

In order to effectively control the micro-grid harmonics and improve the power quality, this paper presents a fuzzy direct power control (Fuzzy Direct Power Control: F-DPC) and LCL filter combination control strategy, and shunt active power filter (Shunt Active Power Filter:SAPF) were studied in this way.This paper briefly introduces the background and significance of this subject, and development status of active power filter, a brief overview of the micro-grid and control strategies. Then analyses the impact of distributed power supply access on the power quality of power grid, as well as micro-grid harmonic generation and improvement. This paper analyses requirements and control strategy of distributed power control, and uses active power filter for harmonic suppression and reactive power compensation. Then introduces APF control method for phase-locked theory, fuzzy direct power control, DC voltage control, LCL filters and other control strategies and all aspects of the control characteristics. The F-DPC controller regulates the DC-link voltage, active and reactive power-flows of the power filte. LCL filter having a high filtering performance.This paper introduces simulation study in Matlab/Simulink simulation software platform. Harmonic control method corresponds to proposed building micro-grid active filter circuit simulation, modeling and simulation analysis. Results of steady state and transient state indicates performance of the proposed control scheme are stable. Simulation results show that F-DPC controller in nonlinear load harmonic suppression can quickly improve the quality of electricity, are closed to sinusoidal line current harmonic content and is much lower than the national requirements. In active power filter, fuzzy direct power control and LCL technology can be an effective way to control harmonics and improve power quality.