Method for operating power converter and power converter

A method for operating a power converter and a power converter (10), the power converter comprising a plurality of controllable power semiconductor switches and configured to: operate in a networking mode of operation such that the controllable power semiconductor switches operate at a first switching frequency; and in response to detecting a short-circuit fault in an AC network (30) connected to the power converter (10), providing an AC current of at least a predetermined magnitude to the AC network (30) such that the controllable power semiconductor switch operates at a second switching frequency, where the second switching frequency is lower than the first switching frequency. 一种用于操作电力转换器的方法以及电力转换器(10)，该电力转换器包括多个可控功率半导体开关并且被配置成：以构网操作模式操作，使得可控功率半导体开关以第一开关频率操作；以及响应于检测到连接至该电力转换器(10)的AC网络(30)中的短路故障向该AC网络(30)提供至少预定幅度的AC电流，使得可控功率半导体开关以第二开关频率操作，其中，该第二开关频率低于第一开关频率。