Intelligent synchronous operation fast loop closing device

Abstract

The invention relates to an intelligent synchronous operation fast loop closing device, which comprises three fast vacuum circuit breakers and an intelligent controller, and is characterized in that the three fast vacuum circuit breakers are respectively arranged in three cabinet bodies, two of the cabinet bodies which are only provided with the fast vacuum circuit breaker are placed at master outlet switches of two transformer respectively, the cabinet body containing the fast vacuum circuit breaker acts as a bus connection switch, the intelligent controller is arranged on a bus connection cabinet body, the fast vacuum circuit breakers in the three cabinet bodies can be controlled simultaneously through a cable or an optical fiber, and the state of each fast vacuum circuit breaker is monitored in real time so as to realize self-inspection. According to the invention, the three fast vacuum circuit breakers are adopted to act as an executing mechanism, the opening time of the fast vacuum circuit breaker is ensured to be less than 3ms, and the closing time of the fast vacuum circuit breakers is ensured to be less than 5ms.

Description

technical field [0001] The invention relates to the technical field of electrical equipment, in particular to an intelligent synchronous operation fast ring closing device. Background technique [0002] With the development of the national economy, users have put forward higher requirements for the reliability of distribution network power supply. Bidirectional power supply is an effective power supply mode to improve the reliability of distribution network power supply. Usually, the distribution network generally adopts the power supply mode of closed-loop design and open-loop operation. [0003] At this stage, the power-down operation of the distribution network during normal maintenance and accident handling mostly adopts the "cold down" method, which is deeply troubled by the negative impact of user dissatisfaction and complaints caused by short-term power outages, as well as the contradiction between power outages and power supply tasks. With the power supply company. ...

AI Technical Summary

Problems solved by technology

[0004] However, the resulting circulating current has a great impact on the safe operation of the distribution network. The two busbars with the same voltage level come from different power plants or main transformers, which are affected by the difference in transformer wiring group, load nature and size, and line parameters. Affected by other factors, there must be a phase angle difference (loop closing angle) between the two sections of power supply, and a circulating current will be generated during the loop closing operation.

When the circulating current is too large, it will cause the overcurrent protection action of the power supply, resulting in the failure of the ring closing operation.

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