ABSTRACT

This paper presents a seven levels inverter (MLI) used as 3Φ Modified Shunt Active Line Conditioner (MSALC) providing features of low harmonic distortion (low THD) and low Harmonic Current Ratio Factor (HCRF), reduced switching losses, suppressing harmonic currents, compensation of reactive power, enhancement of power factor, balancing load current under unbalanced non-linear load and distorted voltage conditions. It employs Self Tuning Filters (STF) for ideal (reference) current generation. Fuzzy Rule-Based (FRB) current controller generates switching patterns or sequence for Electrical potential source inverter. MATLAB fuzzy logic trainer toolbox is used for stimulating the proposed system. The effectiveness of the presented MSALC is desirable to suppress harmonics which is proved from the simulation results validated by experimental prototype hardware using the THD and HCRF values obtained which is not yet reported in other Shunt Active Line Conditioner (SALC) for various types of loads under both steady state and dynamic load conditions.

摘要

本文介绍了一种用作 3Φ 改进并联有源线路调节器 (MSALC) 的七电平逆变器 (MLI)，具有低谐波失真 (低 THD) 和低谐波电流比因数 (HCRF)、降低开关损耗、抑制谐波电流、补偿等特性无功功率，提高功率因数，在不平衡非线性负载和失真电压条件下平衡负载电流。它采用自调谐滤波器 (STF) 来生成理想（参考）电流。基于模糊规则 (FRB) 的电流控制器为电位源逆变器生成开关模式或序列。MATLAB 模糊逻辑训练器工具箱用于刺激所提出的系统。