摘要
分析了阻抗分压式电压跌落发生装置(SI-VSG)的设计特性,对比研究了SI-VSG产生的模拟电网故障和真实电网故障特性,发现两者在电网反馈作用、输出阻抗以及相角跳变等方面有着较大的差异。研究显示采用SI-VSG装置进行风电机组低压穿越(LVRT)试验时会产生失真现象,降低了LVRT能力检测的准确性。提出了一种电网故障模拟系统的拓扑结构,使被测风电机组能在接近真实电网环境下进行测试,提高了风电机组的运行可靠性。
The design characteristic of shunt impedance based voltage sag generator（ SI-VSG） was analyzed.The fault characteristics of the SI-VSG simulation grid and real power system. Great differences in the power feedback function,the output impedance and phase angle jump etc. were found. SI-VSG used for low voltage ride through（ LVRT） test will produce distortion,which can reduce the accuracy of the detection capability of LVRT.Finally,a kind of topological structure for power system fault simulation was put forward,which can be tested in close to real grid for wind turbine and improve the running reliability of wind turbine.
出处
《电器与能效管理技术》
2015年第1期41-45,共5页
Electrical & Energy Management Technology
基金
中-奥(地利)国际合作研究项目(2014DFG62710)
