Hybrid wiring high-voltage power distribution device and expansion and reconstruction method of high-voltage power distribution device

Abstract

The invention discloses a hybrid wiring high-voltage power distribution device and a method for expanding and rebuilding the high-voltage power distribution device. The high-voltage power distribution device is used in a substation and includes a single-bus connection part, a double-bus connection part and a tie circuit breaker, wherein the single-bus connection The part and the double-bus connection part are connected by a tie circuit breaker; the tie circuit breaker is located between the first bus of the single-bus connection part and the second or third bus of the double-bus connection part, and one end of the tie circuit breaker is connected to the first bus connection, and the other end is connected to the second or third busbar. The hybrid wiring high-voltage power distribution device can be obtained through the expansion and transformation method disclosed in the present invention. The invention can ensure higher reliability and flexibility of the expanded and reconstructed high-voltage power distribution device, avoid losses caused by long-term power outages during the expansion process, and effectively shorten the construction period.

Description

technical field [0001] The invention belongs to the field of electric power technology, and in particular relates to a hybrid wiring high-voltage power distribution device used in a substation and a method for expanding and reconstructing the high-voltage power distribution device. Background technique [0002] As a clean energy, wind energy is being developed and utilized on a large scale. In the construction of the booster station of the wind farm, it is often necessary to expand and transform the existing single-bus connection mode of the original booster station into a double-bus connection mode. [0003] figure 1 Shown is a single bus wiring diagram, where CBT1 is the transformer incoming circuit breaker, and CBL1 is the outgoing circuit breaker. When the two circuit breakers CBT1 and CBL1 are closed, the electric energy delivered by the transformer 1 is sent out through the outlet line 1 through the path formed by the two circuit breakers. When the number of transfo...

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Problems solved by technology

However, if the step-up substation is completely rebuilt according to the above-mentioned double-bus wiring method, although the reliability and flexibility are improved, the reconstruction work of the original transformer 1 and outgoing line 1 in the expansion stage is relatively large, and CBT1 and CBL1 need to be connected to two buses. , the transformation cycle is long, and the economic loss caused by power outage is relatively large

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