Fuzzy Linear Active Disturbance Rejection Control of Injection Hybrid Active Power Filter for Medium and High Voltage Distribution Network

Xuesong Zhou,Youjie Ma,Yangyang Cui

doi:10.1109/access.2021.3049832

Abstract

In order to reduce the capacity of the active power filter (APF), improve its dynamic tracking speed and anti-disturbance ability of harmonic currents, so as to better solve the problem of harmonic pollution in the medium and high voltage distribution network, this article is suitable for medium and high voltage distribution networks. The three-phase three-wire injection hybrid active power filter (IHAPF) of high voltage distribution network is the research object, and a fuzzy linear active disturbance rejection controller (Fuzzy-LADRC) suitable for IHAPF voltage outer loop control is proposed. The controller is composed of a fuzzy proportional controller, a linear extended state observer (LESO), and a total disturbance compensation link. The introduction of fuzzy logic control solves the difficult problem of controller parameter tuning, and uses Lyapunov stability definition to prove the stability of the system. Finally, the control performance of IHAPF under the control of Fuzzy-LADRC is simulated and verified by MATLAB&SIMULINK simulation platform, and compared with the traditional PI controller. The results show that the Fuzzy-LADRC controller is better than the traditional PI controller and has good tracking and anti-disturbance capabilities.

Highlights

With the development of science technology and the increasing demand for electricity, a large number of power electronic equipment and various non-linear loads have been invested in the power grid
The error e between the compensation current output by injection hybrid active power filter (IHAPF) and the harmonic current of the system and its derivative eare taken as the input variable of the fuzzy logic controller, and Kup is taken as the output variable
In order to reduce the capacity of the active power filter, the harmonics generated in the medium and high voltage distribution network are effectively controlled

Summary

INTRODUCTION

With the development of science technology and the increasing demand for electricity, a large number of power electronic equipment and various non-linear loads have been invested in the power grid. The traditional PI control algorithm cannot solve the contradiction between the "tracking" and "disturbance resistance" of the system, showing huge limitations This control method cannot suppress the passive filter of the grid series and parallel resonance problems. Linear active disturbance rejection controller (LADRC) is proposed in the process of continuous in-depth thinking on the inner thoughts of traditional PID controllers and modern control theory [12], [13] It does not depend on the mathematical model of the controlled object and can effectively perform the overall disturbance of the entire system. References [13] and [16] proposed a parameter tuning rule for active disturbance rejection controller based on ant colony algorithm and particle swarm optimization These methods successfully applied to the frequency conversion speed regulation of permanent magnet synchronous motor, which greatly improves the control effect. Simulation experiments verify the correctness and effectiveness of the control method proposed in this article

MATHEMATICAL MODEL OF IHAPF

ANTI-DISTURBANCE CHARACTERISTICS ANALYSIS

DESIGN OF IHAPF VOLTAGE OUTER LOOP SYSTEM BASED

SIMULATION ANALYSIS

CONCLUSION