用于光伏低电压穿越测试的电压跌落发生器设计与试验  

Design and Test of Voltage Sag Generators for Low Voltage Ride-through Test of Photovoltaic Systems

作　　者：张军军[1] 郑飞[1] 黄晶生[1] 张晓琳[1] 

机构地区：[1]中国电力科学研究院(南京),江苏省南京市210003

出　　处：《电力系统自动化》2014年第19期108-113,共6页Automation of Electric Power Systems

基　　金：国家电网公司科技项目(NY71-13-036)~~

摘　　要：针对光伏低电压穿越测试,提出一种能适应多种电网电压等级的电压跌落发生器通用设计方案。依据国家标准GB/T 19964—2012中规定的低电压穿越曲线要求,阐述了典型阻抗形式电压跌落发生器的工作原理;提出一种该电压跌落发生器中限流电抗器和接地电抗器的拓扑结构及电气参数设计方法;给出一个电压等级为10kV,且可以5%步长实现从0%至100%电网额定电压的全范围20种电压跌落深度的电压跌落发生器设计实例。最后,针对一台500kW光伏并网逆变器,进行了多种深度尤其是零电压穿越的单相和三相跌落试验,试验结果证明了该方案的有效性。A general design scheme of voltage sag generators（VSGs）is proposed for low voltage ride-through（LVRT）test of photovoltaic （PV） systems.The VSG can also be adapted to a variety of power grid voltage levels.Based on the requirements of LVRT curve specified in the national standard GB/T 19964-2012,the working principle of the typical impedance-type VSG is expounded.A design method is then proposed for the topology structure and electrical parameters of current limiting reactor and grounding reactor of a VSG.Furthermore,a design example of VSG at 10 kV voltage rating is given.The VSG has 20 different sag depths ranging from 0% to 100% of rated voltage with the step of 5%.Finally,for a grid-connected 500 kW PV inverter,the single-phase and three-phase voltage sag tests with several sag depths,especially 0%,are conducted and the test results prove the effectiveness of the design scheme.

关 键 词：低电压穿越 电压跌落发生器 设计方案 拓扑结构 跌落深度 

分 类 号：TM615[电气工程—电力系统及自动化]