公开(公告)号：EP2293401A1

公开(公告)日：2011-03-09

申请号：EP09014871.9

申请日：2009-12-01

Applicant: ABB Research Ltd.

Inventor： Florkowski, Marek ,  Piasecki, Wojciech ,  Wahlroos, Ari ,  Altonen, Janne

IPC: H02H9/00 ,  H02H7/04

CPC classification number: H02H9/007 ,  H02H7/042

Abstract: The subject of the invention is a protective system for voltage transformers, finding application in the attenuation of ferroresonant states occurring in voltage transformers in high and medium voltage grids. A protecting system for voltage transformers comprising a damping burden (3) connected into an open delta system of three auxiliary secondary windings of three single-phase transformers (VT1, VT2, VT3), which is activated and deactivated by a switching element (2) connected in series with the damping burden (3). The protective system is characterised in that the switching element (2) has a control input (C) connected to an output of control means suitable for controlling a time sequence of deactivating the damping burden (3) by controlling the conductive and nonconductive states of the switching element (2).

Abstract translation: 本发明的主题是一种用于电压互感器的保护系统，可应用于高压和中压电网中电压互感器中发生的铁磁谐振状态的衰减。 一种用于电压互感器的保护系统，包括连接到三个单相变压器（VT1，VT2，VT3）的三个辅助次级绕组的开放三角形系统中的阻尼负载（3），所述三个单相变压器由开关元件（2） 与阻尼负载（3）串联连接。 该保护系统的特征在于，开关元件（2）具有连接到控制装置的输出端的控制输入端（C），控制装置适于通过控制阻尼负载（3）的导通状态和非导通状态来控制去激活阻尼负载 开关元件（2）。

公开(公告)号：EP2293401B1

公开(公告)日：2018-09-12

申请号：EP09014871.9

申请日：2009-12-01

Applicant: ABB Research Ltd.

Inventor： Florkowski, Marek ,  Piasecki, Wojciech ,  Wahlroos, Ari ,  Altonen, Janne

IPC: H02H9/00 ,  H02H7/04

CPC classification number: H02H9/007 ,  H02H7/042

Abstract: The subject of the invention is a protective system for voltage transformers, finding application in the attenuation of ferroresonant states occurring in voltage transformers in high and medium voltage grids. A protecting system for voltage transformers comprising a damping burden (3) connected into an open delta system of three auxiliary secondary windings of three single-phase transformers (VT1, VT2, VT3), which is activated and deactivated by a switching element (2) connected in series with the damping burden (3). The protective system is characterised in that the switching element (2) has a control input (C) connected to an output of control means suitable for controlling a time sequence of deactivating the damping burden (3) by controlling the conductive and nonconductive states of the switching element (2).