公开(公告)号：US20140347101A1

公开(公告)日：2014-11-27

申请号：US14345421

申请日：2012-09-20

Applicant: ALSTOM Technology Ltd

Inventor： Wolfgang Grieshaber ,  Jean-Pierre Dupraz

IPC: H03K17/13 ,  H03K17/94 ,  G01R19/00

CPC classification number: H03K17/136 ,  G01R19/0092 ,  H02J3/36 ,  H02M7/797 ,  H03K17/94 ,  Y02E60/60

Abstract: The invention relates to a method of opening a shunt switch carrying a current, the switch being connected in parallel with at least one thyristor of a high voltage DC network, interruption of the current flowing through the switch being initiated at the time of a current zero of the current flowing through the switch, the method being characterized in that it includes, based on a measurement effected by means for measuring the current flowing through the switch, a step of adjusting a control angle of the thyristor to position the current zero in a zone in which the time derivative of the measured current is a continuous function and the absolute value of a peak value of the measured current is substantially equal to the absolute value of the inaccuracy of the measurement of the current zero.

Abstract translation: 本发明涉及一种打开承载电流的并联开关的方法，该开关与高压DC网络的至少一个晶闸管并联连接，流过开关的电流的中断在电流零点时启动 的方法，其特征在于，它包括：基于通过测量流过开关的电流的测量而实现的测量;调节晶闸管的控制角度以将电流零点定位在一个 测量电流的时间导数为连续函数的区域，测量电流的峰值的绝对值基本上等于电流零点测量的不准确度的绝对值。