基于不同测试环境的光伏并网逆变器低电压穿越能力验证方法  

Validation of LVRT Capability of PV Grid-connected Inverters in Different Test Environments

作　　者：时珊珊[1] 张双庆[2] 林小进[2] 李红涛[2] 包斯嘉[2] 

机构地区：[1]国网上海市电力公司电力科学研究院,上海200437 [2]中国电力科学研究院,江苏南京210003

出　　处：《电气自动化》2015年第5期43-46,共4页Electrical Automation

摘　　要：针对光伏发电站可能出现的由于逆变器低电压穿越问题引起的电网事故,在不同的测试环境下,我国针对光伏并网逆变器开展了光伏发电站低电压穿越性能测试,包括实验室型式试验、光伏电站现场试验和人工接地短路试验。研究了以上三种不同测试环境下的试验原理,并对三种模拟短路故障方法进行分析。采用三种试验方法对某型号500 k W光伏并网逆变器进行测试.测试结果表明,三种方法有效地验证了光伏并网逆变器的低电压穿越能力,并起到了较好的互补作用,有力地保障了我国光伏电站实现健康有序的并网。Perspective to possible grid accidents in photovohaic （ PV ） power stations caused by low-voltage ride through （ LVRT ） , China has made tests on the LVRT performance of PV grid-connected inverters of PV power stations under different test environments, including laboratory type test, field test on the site of PV power stations, and artificial grounding short-circuit test. This paper studies the test principles in these three different test environments, analyses three methods for simulating short-circuit fault. Furthermore, a 500 kW PV grid-connected inverter is tested in three test methods. The test results show that these three methods verify the LVRT capability of the PV grid-connected inverter and produce good complementary effects, thus providing a strong guarantee for healthy orderly grid connection of China＇ s PV power stations.

关 键 词：低电压穿越 型式试验 现场试验 人工短路试验 光伏并网逆变器 

分 类 号：TM615[电气工程—电力系统及自动化]