公开(公告)号：US20160313387A1

公开(公告)日：2016-10-27

申请号：US15100575

申请日：2014-11-27

Applicant: ABB TECHNOLOGY LTD

Inventor： Mario Schweizer ,  Roman Grinberg

IPC: G01R31/02 ,  G01R31/40 ,  H02M1/088

CPC classification number: G01R31/028 ,  G01R31/40 ,  H02M1/088 ,  H02M7/483 ,  H02M2001/0006 ,  H02M2007/4835

Abstract: A method and arrangement for determining a capacitor degradation parameter associated with the degree of degradation of a cell capacitor in a converter cell of a power converter including a plurality of identical converter cells, including redundant converter cells, which converter cell, prior to determining the capacitor degradation parameter, has been bypassed. The method includes a) obtaining a measurement parameter value associated with discharging of the cell capacitor, forming a dc-link, from a measurement start voltage level at a measurement start time to a measurement end voltage level at a measurement end time, and b) determining a value of the capacitor degradation parameter based on the measurement parameter value.

Abstract translation: 一种用于确定与包括冗余转换器单元的多个相同的转换器单元的功率转换器的转换器单元中的单元电容器的劣化程度相关联的电容器劣化参数的方法和装置，该转换器单元在确定电容器之前 降解参数，已被绕过。 该方法包括：a）从测量开始时的测量开始电压电平到测量结束时间的测量结束电压电平，获得与单元电容器的放电相关联的测量参数值，形成dc-link，以及b） 基于测量参数值确定电容器劣化参数的值。