Simplifying method for backup automatic switching device for double-internal-bridge connection

Abstract

The invention discloses a simplifying method for a backup automatic switching device for double-internal-bridge connection. The double-internal-bridge connection comprises three power input lines, a circuit breaker QF1, a circuit breaker QF2, a circuit breaker QF3, a circuit breaker QF4, a circuit breaker QF5, a first main transformer, a second main transformer and a third main transformer, wherein the three power input lines include a first circuit, a second circuit and a third circuit, the circuit breaker QF1, the circuit breaker QF3 and the circuit breaker QF5 are circuit breakers for the first circuit, the second circuit and the third circuit respectively, the circuit breaker QF2 is a bridge circuit breaker between the first circuit and the second circuit, the circuit breaker QF4 is a bridge circuit breaker between the second circuit and the third circuit, and the backup automatic switching device for the double-internal-bridge connection is simplified into two internal bridge backup automatic switching device bodies and one expanded internal bridge backup automatic switching device body. The simplifying method for the backup automatic switching device for the double-internal-bridge connection has the advantages that the backup automatic switching device is simple and clear in operation mode after being simplified, memorizing is facilitated, and requirements can be met only by means of logical arrangement among existing simple backup automatic switching devices.

Description

technical field [0001] The invention relates to a simplified method for self-injection of double inner bridge wiring equipment powered by a three-way power supply, and belongs to the technical field of electric power transmission and distribution. Background technique [0002] In the primary main wiring of many 110kV substations, the double inner bridge wiring powered by three power sources is used, and the corresponding backup power automatic input device (abbreviated as standby automatic input) has "exhaustive" operation modes, as many as 21 kinds, not many It is easy to remember; there is no product supply in the market for the wiring equipment automatic switch, and it needs special design. The logic of the wiring equipment automatic switch formed by the "exhaustive method" is also very complicated, and the operation mode is sometimes incomplete or difficult to exhaustively enumerate. The engineering example proves that the backup power automatic input device with complex...

AI Technical Summary

Problems solved by technology

However, how to simplify the self-switching of the double inner bridge wiring and how to verify the correctness of the operation mode has not been solved by the prior art.

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