张金华;陈琳浩;王晨清;张保会;郝治国;

• 1:西安交通大学电气工程学院
• 2:国网江苏省电力有限公司电力科学研究院

摘要(Abstract)：

双馈风电机组(doubly-fed induction generator,DFIG)多机并网系统发生故障时,各DFIG采用的控制方式和短路计算模型不尽相同,会对电网短路电流分布产生影响。为此,提出一种计及DFIG控制方式判断的电网短路电流计算方法。DFIG控制方式主要取决于机端电压跌落程度,因此针对具有辐射状接线结构的DFIG多机并网系统,分析了持续励磁控制和投crowbar保护两种控制方式下DFIG故障模型对系统故障电压分布的影响,根据所得电压分布特性提出一种故障后DFIG多机控制方式判断方法。然后与传统的同步发电机供电系统对比,给出了适用于DFIG并网系统的节点电压方程以及电网短路计算程序框图。最后以6台DFIG接入电网为例,仿真验证了所提DFIG控制方式判断方法和短路电流计算方法的有效性。

关键词(KeyWords)： 风力发电;双馈风电机组;短路电流;故障等值模型;低电压穿越控制

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划项目(2016YFB0900600)~~

作者(Author): 张金华;陈琳浩;王晨清;张保会;郝治国;

Email:

DOI: 10.13335/j.1000-3673.pst.2018.0666

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