基于LCL的D-STATCOM配电网电压波动与闪变的抑制研究  

Study on Voltage Fluctuation and Flicker Suppression of D-STATCOM Distribution Grid Based on LCL

作　　者：邢宇婷 苏宏升[1] XING Yuting;SU Hongsheng(School of Automation ＆ Electrical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, Chin)

机构地区：[1]兰州交通大学自动化与电气工程学院,兰州730070

出　　处：《电力电容器与无功补偿》2018年第2期19-25,共7页Power Capacitor & Reactive Power Compensation

摘　　要：配电网静止同步补偿器(D-STATCOM)用于抑制配电网电压波动与闪变。为使D-STATCOM输出电流的谐波含量满足要求,多通过单电感L限制高频谐波电流。但中高功率时,满足谐波标准所需的L值增大,从而会引起D-STATCOM直流侧的电压值增加、装置的体积增加等问题。为此,本文使用LCL滤波器代替了传统L滤波器,从而减小了总电感值,降低了系统的体积与成本。仿真验证了理论的正确性,证明了基于LCL滤波器的D-STATCOM不仅对配电网电压波动与闪变有很好的抑制作用,同时与基于L滤波器的D-STATCOM相比,输出电流的谐波抑制效果更好。Distribution static synchronous compensator（D-STATCOM）is used to suppress voltage fluctuation and flicker in distribution grid.For keeping the harmonic contents of D-STATCOM output current meet the requirement,high frequency harmonic current is limited by the single inductor L.In case of intermediate and high power,however,the L value needed to meet the harmonic standard is increased,causing the increase of voltage at the DC side of D-STATCOM and of volume of the device.Therefore,in this paper,LCL filter is used to replace traditional L filter so to reduce the total inductance,system volume and cost.The correctness of the theory is verified by the simulation that D-STATCOM based on LCL filter not only has good suppression to the voltage fluctuation and flicker of the distribution grid,but also,compared to the D-STATCOM based on L filter,has good harmonic suppression result of output current.

关 键 词：静止同步补偿器(D-STATCOM) 电压波动和闪变 LCL滤波器 PI控制 

分 类 号：TM761.12[电气工程—电力系统及自动化]