电动汽车充电对城市电网供电负载均衡补偿  

Balancing Compensation for Power Supply Load of Urban Power Grid with Electric Vehicle Charging

作　　者：安旭涛 潘峰[1] 刘旭强 常馨方 AN Xu - tao, PAN Feng, LIU Xu - qiang, CHANG Xin - fang(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,山西太原030024

出　　处：《计算机仿真》2018年第10期140-144,共5页Computer Simulation

基　　金：山西省研究生教育创新项目(2017SY074)

摘　　要：电动汽车无序充电加剧了城市电网无功消耗和三相不平衡,采用配网静止无功发生器实现电网供电负载的均衡补偿。基于瞬时无功功率理论的ip-iq检测法采用的锁相环技术稳定性差,且易造成补偿偏差和延时。为实现城市电网供电负载均衡补偿,采用信号延迟法快速分离电压电流的正负序分量,且引入基于电网电压正序分量的单同步坐标系锁相环检测不平衡电网系统的电压相位以改进传统ip-iq瞬时无功检测法,采用基于前馈解耦的正负序同步补偿策略使D-STATCOM输出电流实时跟踪补偿电网。通过MATLAB仿真软件对研究的电动汽车充电对城市电网供电负载均衡补偿策略建模调试仿真,结果表明改进均衡补偿策略提高了D-STATCOM补偿实时性和精确性。电动汽车充电破坏城市电网均衡运行,接入D-STATCOM可快速就地均衡补偿,提高电网电能质量。Disorderly charging of electric vehicle has exacerbated reactive power consumption and three - phase unbalance of urban power grid, and D - STATCOM was adopted to realize balancing compensation. The ip - iq detection based on instantaneous reactive power theory using phase - locked loop has poor stability, and easily causes compensation deviation and delay. To realize balancing compensation of urban power supply load, using signal delay method fast separates positive and negative sequence component, and introducing single synchronous coordinate system based on positive sequence component of grid voltage to phase - locked loop detects the voltage phase of unbalanced power system to improve traditional ip - iq detection, the positive and negative sequence synchronous compensation strategy based on feed - forward decoupling algorithm makes the output current of D - STATCOM follow and compensate power grid in real time. Through MATLAB build and debug model simulation for power supply load balancing compensation of urban power grid with electric vehicle charging. Simulation results show the improved balancing compensation strategy can improve the compensation real - time and accuracy. Electric vehicle charging damages balancing operation of urban power grid, and accessing D - STATCOM can rapidly achieve local balancing compensation, improve the power quality of power grid.

关 键 词：信号延迟 均衡补偿 前馈解耦 静止无功发生器 

分 类 号：TM743[电气工程—电力系统及自动化]