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。
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.
引文
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