双馈电源接入对变压器差动保护的影响机理分析Influence Mechanism Analysis of Doubly Fed Induction Generator Access on Differential Protection of Transformer
肖繁,尹柳,戚宣威,张哲,尹项根
XIAO Fan,YIN Liu,QI Xuanwei,ZHANG Zhe,YIN Xianggen
摘要(Abstract)：
变压器是电网的重要组成部分,其正常运行对电网安全运行极为重要。然而双馈风电机组异于传统同步发电机的故障电流特性,将可能影响变压器差动保护性能。首先,考虑双馈风电感应机组低电压穿越运行的影响,分析了双馈风电感应机组的短路电流特征。其次,分析双馈风电感应机组接入对变压器差动保护的影响。最后,通过仿真案例对研究结论的正确性进行了验证。为双馈感应发电机组接入后的电网继电保护配置提供参考。
Transformer is a key part of the power system, and its normal operation is critical to operation safety. The fault current characteristics of the doubly fed induction generator are different from that of the traditional synchronous generator, and it may have impact on differential protection performance of the transformer. Firstly, the impact of LVRT operation of doubly fed induction generator is considered, and short-circuit current characteristics are analyzed; secondly, the impact of doubly fed induction generator access on differential protection of transformer is analyzed. Finally, the correctness of the conclusion is verified by the simulation case to provide a reference to relay protection configuration of the power grid with doubly fed induction generators integrated.
关键词(KeyWords)：
风电机组;低电压穿越;故障电流;继电保护;变压器
wind turbine generator system;low-voltage ride-through(LVRT);fault current;relay protection;transformer
基金项目(Foundation): 国家自然科学基金项目(51177058)
作者(Author):
肖繁,尹柳,戚宣威,张哲,尹项根
XIAO Fan,YIN Liu,QI Xuanwei,ZHANG Zhe,YIN Xianggen
DOI: 10.19585/j.zjdl.201812008
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