公开(公告)号：US3821629A

公开(公告)日：1974-06-28

申请号：US37218973

申请日：1973-06-21

Applicant: ASEA AB

Inventor： LISS G

IPC: H02M1/08 ,  H02M7/00 ,  H02M7/757 ,  H02M1/18

CPC classification number: H02M7/7575 ,  H02M1/081 ,  Y02E60/60

Abstract: A converter station is composed of two parallel static converters each provided with a control system including a current regulator which is adjusted in accordance with a predetermined load distribution over the two converters. Each of the control systems is provided with an upper and a lower limit value emitter for the control angle. In order to equalize the load distribution between the static converters in the event of a commutation fault in one of them, current sensitive and comparing members are provided which sense the current distribution between the converters. These members emit a signal in the least loaded static converter to the lower limit value emitter in the same static converter for temporarily reducing the lower limit value for the control angle, in response to deviation from the normal current distribution exceeding a certain value.

公开(公告)号：US3806793A

公开(公告)日：1974-04-23

申请号：US35648873

申请日：1973-05-02

Applicant: ASEA AB

Inventor： LISS G

IPC: G05F1/10 ,  G01R25/00 ,  G01R31/00 ,  H02M7/155 ,  H02M7/46

CPC classification number: H02M7/1557 ,  G01R25/00

Abstract: For measuring the delay angle in a static converter, a rampfunction generator is provided for each rectifier phase connected to the alternating current network. The ramp-function generator includes a timing device responsive to passage through zero of the commutation voltage derived from the network, and a connecting member which connects the ramp-function generator to a sensing and holding circuit. The connecting member is controlled by the control pulse device of the converter so that the signal stored in the sensing and holding circuit at any moment corresponds to the delay angle for the rectifier last ignited.

Abstract translation: 为了测量静态转换器中的延迟角，为连接到交流网络的每个整流器相位提供了斜坡函数发生器。 斜坡函数发生器包括响应于从网络导出的换向电压通过零的定时装置，以及将斜坡函数发生器连接到感测和保持电路的连接构件。 连接构件由转换器的控制脉冲装置控制，使得存储在感测和保持电路中的信号在任何时刻对应于最后被点燃的整流器的延迟角。