公开(公告)号：EP3242383A1

公开(公告)日：2017-11-08

申请号：EP16167998.0

申请日：2016-05-03

Applicant: ABB Technology Oy

Inventor： Viitanen, Tero ,  Alahuhtala, Jarno ,  Heikkilä, Teemu ,  Routimo, Mikko

IPC: H02M1/12 ,  G01R31/42 ,  G01R27/26 ,  G01R31/28 ,  H02M7/48

CPC classification number: H02M1/126 ,  G01R27/2605 ,  G01R31/28 ,  G01R31/42 ,  H02M7/48

Abstract: A method for monitoring a change in a capacitance of an AC filter in an electric system, and an electric system comprising a converter (10), an AC filter (20) comprising at least one capacitance and being connected to the AC output of the converter, switching means (K) connected to an output of the AC filter, and control means (11) configured to control the switching means to open circuit the output of the AC filter, supply by the converter (10) an AC voltage with a predetermined magnitude and a predetermined frequency from the AC output of the converter to the AC filter, monitor a current or currents flowing through the AC output of the converter as a result of the AC voltage supplied to the AC filter, and determine on the basis of the monitored current or currents a change in the at least one capacitance of the AC filter.

Abstract translation: 一种用于监测电力系统中的交流滤波器的电容变化的方法，以及一种电气系统，该电气系统包括变换器（10），包括至少一个电容的交流滤波器（20）并且连接到变换器的交流输出 ，连接到AC滤波器的输出的开关装置（K），以及配置成控制开关装置以使AC滤波器的输出开路的变换器（10）提供具有预定电压的AC电压的控制装置（11） 振幅和预定频率从转换器的交流输出到交流滤波器，监视流过交流转换器的交流输出的电流或电流，作为交流电压供给交流滤波器的结果，并基于 监视交流滤波器的至少一个电容中的电流或电流的变化。