基于虚拟仪器技术的光伏逆变器低电压穿越测试系统  

Low voltage ride-through test system of photovoltaic inverter based on virtual instrument technology

作　　者：曹磊[1] 秦筱迪[1] 夏烈[1] 徐亮辉[1] 孙耀杰[2] 

机构地区：[1]中国电力科学研究院新能源所,南京210003 [2]复旦大学光电源研究所,上海200433

出　　处：《电测与仪表》2015年第14期71-75,103,共6页Electrical Measurement & Instrumentation

基　　金：国家电网公司科技项目资助(NY71-13-036)

摘　　要：低电压穿越(Low Voltage Ride-through,LVRT)是考核光伏逆变器并网性能的一项重要指标。为了实现光伏逆变器在低电压穿越测试过程中交流侧电压与电流的实时监测以及测试结果评价,设计了一种基于虚拟仪器技术的光伏逆变器低电压穿越测试系统。介绍了光伏逆变器低电压穿越测试系统的硬件结构和软件设计方案,研究了光伏逆变器低电压穿越测试有功功率恢复和动态无功支撑等关键指标计算方法。在此基础上,通过实例验证了平台具有较高的测量精度。Low voltage ride through （LVRT） is an important evaluation index of photovoltaic inverter grid-connected per- formance. In order to monitor the AC side voltage and current of photovoltaic inverter in real time and evaluate the test re- sults during the LVRT test, a low voltage ride-＇through test system of photovoltaic inverter based on virtual instrument tech- nology is designed in this paper. The hardware structure and software design scheme of the photovohaic inverter low voltage ride-through test system are introduced and the critical index calculation method of the photovoltaie inverter active power re- covery and dynamic reactive power support in the low voltage ride through test is studied in this paper. On this basis, the example proves that the platform has high measurement precision.

关 键 词：低电压穿越 光伏逆变器 虚拟仪器 有功功率恢复 动态无功支撑 

分 类 号：TM934[电气工程—电力电子与电力传动]