公开(公告)号：WO1998011645A1

公开(公告)日：1998-03-19

申请号：PCT/US1997014911

申请日：1997-08-25

Applicant: ABB POWER T & D COMPANY INC.

Inventor： ABB POWER T & D COMPANY INC. ,  BAPAT, Vinod, N. ,  RECKLEFF, John, G. ,  DANFORS, Per, A.

IPC: H02J03/38

CPC classification number: H02J9/06 ,  H01H9/548 ,  H01H2300/018 ,  H02J3/38 ,  Y10T307/615 ,  Y10T307/647 ,  Y10T307/735 ,  Y10T307/826 ,  Y10T307/839

Abstract: Methods and apparatus for switching a load between first (P) and second sources (A) is shown to include first (32) and second (42) solid state switches connected to the load. First (30) and second (40) mechanical breakers are connected between the switches and the sources so that each source is connected to the load through a circuit breaker and solid state switch. A controller (50) is connected to sense the voltage from the first (P) and second (A) sources. The controller (50) is connected to the first (32) and second (42) switches and the first (30) and second (40) mechanical breakers. The controller (50) senses the phase difference from the voltages from the first (P) and second (A) sources. The controller (50) causes the first (30) and second (40) mechanical breakers to open and close in response to sensing the phase difference between the sources. The first (30) and second (40) mechanical breakers can include medium voltage vacuum breakers. In a preferred embodiment, when the controller (50) senses that the phase differences between sources is more than 30 degrees out of phase, the controller (50) will open the circuit breaker (40) connected to the alternate source (A). In this manner voltages stress on the solid state switching devices is minimized.

Abstract translation: 示出了用于在第一（P）和第二源（A）之间切换负载的方法和装置，包括连接到负载的第一（32）和第二（42）固态开关。 第一（30）和第二（40）机械断路器连接在开关和源之间，使得每个源通过断路器和固态开关连接到负载。 连接控制器（50）以感测来自第一（P）和第二（A）源的电压。 控制器（50）连接到第一（32）和第二（42）开关以及第一（30）和第二（40）机械断路器。 控制器（50）感测与来自第一（P）和第二（A）源的电压的相位差。 响应于感测源之间的相位差，控制器（50）使得第一（30）和第二（40）机械断路器打开和关闭。 第一（30）和第二（40）机械断路器可以包括中压真空断路器。 在优选实施例中，当控制器（50）感测到源极之间的相位差超过相位差超过30度时，控制器（50）将打开连接到替代源（A）的断路器（40）。 以这种方式，固态开关器件的电压应力被最小化。