公开(公告)号：WO2008106136A1

公开(公告)日：2008-09-04

申请号：PCT/US2008/002537

申请日：2008-02-26

Applicant: ABB TECHNOLOGY AG ,  ANDERSSON, Ulf ,  BJORKLUND, Hans ,  DANIEL, John ,  DICKMANDER, David

Inventor： ANDERSSON, Ulf ,  BJORKLUND, Hans ,  DANIEL, John ,  DICKMANDER, David

IPC: G05F1/00 ,  H02H1/04

CPC classification number: G05F1/00 ,  H02H3/023 ,  H02H7/04

Abstract: A method and apparatus for mitigating dynamic overvoltage (DOV) in an AC network. A distribution and power transformer has its primary connected to the high voltage bus of the network and its secondary connected to a switching device. Upon the occurrence of a condition known to cause a DOV and the DOV a control system cause the switching device to change from a nonconductive mode to a conductive mode in less than the time for one cycle of the operating frequency of the AC network. This change in switching device conduction places a short circuit across the transformer secondary.

Abstract translation: 一种用于减轻AC网络中的动态过电压（DOV）的方法和装置。 配电和电力变压器主要连接到网络的高压母线，其二次连接到开关装置。 在发生已知导致DOV和DOV的情况下，控制系统使得开关装置在小于AC网络的工作频率的一个周期的时间内从非导通模式改变为导通模式。 开关器件导通的这种变化在变压器二次侧产生短路。