Power distribution area self-healing control method and system based on intelligent circuit breaker actions

Abstract

The invention provides a power distribution area self-healing control method and system based on intelligent circuit breaker actions. The method comprises the steps that a tripped topmost-stage intelligent circuit breaker executes reclosing operation after the electrification time of an upper pile head is larger than a set threshold value Tx; the tripped next-stage intelligent circuit breaker executes reclosing operation after the electrification time of the upper pile head is greater than the set threshold value Tx; reclosing operation is repeatedly conducted until the tripped last-stage intelligent circuit breaker executes reclosing operation after the electrified time of the upper pile head of is greater than the set threshold value Tx; and if the intelligent circuit breakers having undergone reclosing do not generate post-acceleration protection tripping within a time threshold Ty, it is determined that no fault point exists at a downstream position, and a backup protection detection function is started; or if the post-acceleration protection tripping occurs within the time threshold Ty, it is indicated that closing is unsuccessful and a fault point exists at the downstream position. According to the invention, on the premise of not depending on communication and information interconnection and intercommunication, fault positioning and isolation and non-fault area self-healing in the power distribution area can be realized by analyzing the action logic sequence of the intelligent circuit breakers.

Description

technical field [0001] The invention relates to the field of electric power system automation, in particular to a self-healing control method and system for a power distribution station based on the action of an intelligent circuit breaker. Background technique [0002] The low-voltage 400V distribution station area directly supplies power to thousands of households, with many points and a wide area. The existing distribution station area has a "bottleneck" in equipment management and information sharing. Once a fault occurs in the distribution station area, there is no mature and reliable failure The self-healing recovery method can only rely on manual troubleshooting to realize fault point judgment and fault type identification. Therefore, it takes a long time to troubleshoot and eliminate faults, and it is difficult to meet the requirements of power supply reliability and the pursuit of high-quality life for the general public. [0003] figure 1 Shown is the fault handli...

AI Technical Summary

Problems solved by technology

The main problem is that the power distribution area can only know that a power outage has occurred, but it is impossible to clearly determine whether the power outage is caused by an internal fault in the distribution area, and it is impossible to implement fault detection in the case of an internal fault in the distribution area Self-healing recovery functions such as point and fault nature research and judgment, automatic restoration of power supply in non-faulty areas

The above deficiencies are mainly due to: (1) The ammeter-type acquisition equipment contained in the distribution station area does not have the fault monitoring function. The fault detection function cannot be realized; (2) Although the circuit breaker equipment contained in the distribution station area can detect faults and trip, most of them cannot report the action information to the superior system; even if the action information can be reported to the superior system, due to the lack of The fault self-healing judgment system in the distribution station area cannot comprehensively judge the fault point and fault type, let alone realize the automatic recovery control of the subsequent non-faulty area

Images