作者：汪颖¹, 任杰¹, 许中², 金耘岭³, 肖先勇¹

作者单位：1. 四川大学电气信息学院, 四川 成都 610065;
2. 广州供电局有限公司, 广东 广州 510001;
3. 南京灿能电力自动化股份有限公司, 江苏 南京 211112

关键词：电压暂降特征;光伏逆变器;电压暂降耐受能力;过程免疫时间曲线;耐受能力测试

摘要：

为准确评估光伏逆变器的电压暂降耐受能力，弥补现有光伏逆变器低电压穿越能力研究的不足，对光伏逆变器的电压暂降耐受能力进行测试。提出从电压暂降特征入手，同时考虑电压暂降幅值、持续时间、暂降起始波形点等电压暂降特征的测试方法，在研究光伏逆变器电压暂降耐受能力测试向量的基础上，对实验室不同工况下的光伏逆变器进行测试，得到电压暂降耐受曲线。实验结果证明：不同工况和不同电压暂降特征对光伏逆变器电压暂降耐受能力均有影响，在研究光伏逆变器低电压穿越能力时应考虑多种暂降特征及设备工况。

Characterization and test of PV inverter for voltage sag tolerance

WANG Ying¹, REN Jie¹, XU Zhong², JIN Yunling³, XIAO Xianyong¹

1. College of Electrical Engineering and Information Technology, Sichuan University, Chengdu 610065, China;
2. Guangzhou Power Supply Bureau Limited, Guangzhou 510001, China;
3. Nanjing Shining Electric Automation Co., Ltd., Nanjing 211112, China

Abstract: In order to accurately evaluate the voltage sag tolerance of PV inverter and make up for the shortage of research on the existing PV inverter's low voltage ride through capability, the voltage sag tolerance of PV inverter is tested. The test method is proposed which has considered the amplitude, duration, the starting waveform of sag and other voltage sag characteristics. On the basis of studying the test vectors of PV inverter voltage sag tolerance, the PV inverter under the different working conditions is tested in the laboratory to obtain the voltage sag tolerance curve. The test result shows that PV inverter voltage sag tolerance is different depending on working conditions and the characteristics of voltage sags. Thus, it is suggested that a variety of characteristics of voltage sags and equipment working conditions be considered in the study of low voltage ride through capability of the PV inverter.

Keywords: voltage sag characteristics;PV inverter;voltage gas tolerance;process immunity time curve;tolerance test

2018, 44(1): 95-100  收稿日期: 2017-05-10;收到修改稿日期: 2017-06-27

基金项目: 

作者简介: 汪颖(1981-),女,重庆市人,副教授,博士,研究方向为电能质量与优质供电。

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