基于分布式光伏逆变器的电能质量综合补偿装置

为解决配电网中日益突出的谐波超标、电压偏差、三相不平衡等电能质量问题,提出了一种利用分布式光伏逆变器的冗余容量实现无功、谐波、负序的综合补偿功能的控制策略,研究了一种在不影响正常光伏逆变器并网发电的情况下实现电能质量综合治理(DG-FACTS)的方法。首先分析了适用于DG-FACTS的谐波检测、无功指令提取及不平衡分量检测的算法,然后研究了指令合成及电流跟踪控制算法,并通过Matlab/Simulink仿真验证了DGFACTS功能的可行性。仿真结果表明:所提出的基于分布式光伏逆变器的电能质量综合补偿方法具有较好的实用性。

Comprehensive Compensation Device for Power Quality Based on Distributed Photovoltaic Inverter

In order to solve the problem of power quality, such as excessive harmonics, voltage deviation and three-phase imbalance in distribution network, This paper presents a control strategy based on the redundant capacity of the distributed PV inverter to realize the comprehensive compensation function of reactive power, harmonics and negative sequence. A method is proposed to realize the control of the inverter without affecting the power generation of the normal PV inverter Power Quality Integrated Management (DG-FACTS) method. Firstly, the algorithm of harmonic detection, reactive power instruction extraction and unbalanced component detection for DG-FACTS is analyzed. Then, the instruction synthesis and current tracking control algorithm is studied, and the function of DG-FACTS is verified by simulation based on Matlab/Simulink. Results of simulation show that the proposed method of comprehensive compensation of power quality based on distributed PV inverter has good practicability.