System interconnection device and method of designing same

Details System interconnection device and method of designing same System interconnection device and method of designing same

H - Electricity

02

H

H02H 3/08 (2006.01) H02H 7/26 (2006.01) H02J 3/04 (2006.01)

Patent

CA 2268203

A system interconnection device connected between two systems, such as a commercial bus line carrying power from a commercial power line and a private bus line carrying power from a private power generator, is able to connect and disconnect the two systems, and, in the event of a fault, has a current-limiting effect, thus preventing instantaneous voltage drop of the respective bus lines. In the system interconnection device, unit parallel circuits made up of diodes and DC reactors are serially connected so that the diodes thereof have opposite directions. With this structure, in realizing operations equivalent to those of a conventional system interconnection device having a DC reactor between DC terminals of a single-phase rectifying bridge circuit, the number of diodes, which are rectifying elements, can be halved. This not only enables reduction of the total cost of elements, but also, particularly in high-voltage and extra-high-voltage systems, enables great reduction of the cost and space devoted to insulation.

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