低压配网的改进均衡补偿电流检测法研究  

Study on Improved Balancing Compensation Current Detecting Method of Low Voltage Distribution Network

作　　者：潘峰[1] 安旭涛 王世伟 薛萍 PAN Feng;AN Xu-tao;WANG Shi-wei;XUE Ping(College of Electronic and Information Engineering,Taiyuan University of Science and Technology,Taiyuan Shanxi 030024,China)

机构地区：[1]太原科技大学电子信息工程学院

出　　处：《计算机仿真》2019年第11期54-58,共5页Computer Simulation

基　　金：山西省研究生教育创新项目(2017SY074)

摘　　要：低压配网为其区域负荷供应380V交流电,由于用电负载中含有大量非线性元件消耗无功功率,且易引起三相不平衡。采用D-STATCOM实现三相四线制电网的均衡补偿,由于ip-iq检测法无法精准计算电压相位和检测均衡补偿控制电流,应进行改进。分离负载电流中零序分量,引入信号延时分序法分离正序和负序,且引入基于电网电压正序分量的单同步软件锁相环计算相位。改进检测法经Simulink仿真和DSP半实物硬件在环仿真平台验证了其补偿电流检测效果及均衡补偿控制性能,可满足低压系统的均衡补偿。Low-voltage distribution network supplies 380 V AC-power for its regional loads which contain a large number of non-linear components that consumes reactive power and cause three-phase imbalance. Balancing compensation was realized using D-STATCOM, because ip-iq detection cannot accurately calculate voltage phase and detect balanced compensation control current, and it should be improved for this purpose. Zero-sequence component was separated from load current, and positive sequence and negative sequence wee separated by using signal-delay separate method and introducing single synchronous reference frame software phase-locked-loop based on positive sequence of grid voltage to calculate phase. Its compensation current detection effect and compensation control performance were verified through Simulink and DSP hardware-in-loop simulation platform, and the result shows it can meet the balancing compensation requirement of charging stations system.

关 键 词：均衡补偿 静止无功发生器 正负序分离 锁相环 硬件在环 

分 类 号：TM743[电气工程—电力系统及自动化]