中文摘要：

含Crowbar保护的双馈风力发电机在模型上不同于普通异步发电机。首先,双馈风力发电机在转子侧连接着变流器;其次对转子侧变流器采用Crowbar保护。因此,在短路电流计算方法上,两者也必然有相应的差异。目前,在双馈风力发电机短路电流计算方面,我国采用的国家标准为GB/T15544.1《三相交流系统短路电流计算》。该标准中,没有考虑广泛采用的Crowbar电阻元件对短路电流的影响。为此,在研究建立含Crowbar保护的双馈风力发电机新模型的基础上,推导双馈风力发电机短路电流实用计算公式。文中还用PSCAD/EMTDC软件的精确模型仿真结果对提出的含Crowbar电阻的双馈风力发电机三相短路电流实用计算公式进行了验证,并比较了国家标准计算方法。研究表明：推导提出的含Crowbar保护的双馈风力发电机三相短路电流实用计算公式准确、方便,对风电场的电气安全设计具有重要意义。

英文摘要：

Model of DFIG with crowbar protection is different from common asynchronous generator in those： firstly, DFIG rotor side is connected to converter; secondly, the converter is protected with crowbar. In calculation method, two generators also have corresponding differences. In term of short-circuit current calculation, national standard GB/T 15544.1《Short-circuit current calculation in three-phase a.c. systems》is adopted now in China. This calculation method does not consider crowbar resistance impact. Therefore, a new model of DFIG with crowbar protection was established to research practical calculation method of three-phase short-circuit current of DFIG with crowbar protection. Practical calculation method of three-phase short-circuit current was verified with PSCAD/EMTDC simulation. Comparison between national standard calculation method and practical calculation method with new model was performed. It demonstrates that practical calculation method of three-phase short-circuit current of DFIG with crowbar protection proposed in this paper is accurate and convenient. It is of great significance to electrical safety design of wind farm.