Analysis method and management method of dynamic load capacity of circuit breaker

Abstract

The invention relates to an analysis method and a management method for circuit breaker dynamic load capacity. The analysis method comprises the following steps: a threshold value pre-setting step; and judgment steps including a real-time judgment step, an accumulation judgment step and an electrical endurance judgment step. By adopting at least one of the judgment steps, a circuit breaker dynamic load real-time data evaluation result, a circuit breaker dynamic load cumulative data evaluation result and a circuit breaker dynamic load possible electrical endurance evaluation result are synthesized to obtain a circuit breaker dynamic load evaluation result to be output. Through conducting real-time analysis and evaluation according to property and magnitude of a main loop current of a circuit breaker, the margin of the circuit breaker in withstanding various types of current, the load which can be increased to the circuit breaker and the possible failure that the circuit breaker can tolerate are determined, thereby providing basic support for the management of the circuit breaker, being capable of avoiding failure rate, prolonging failure-free operation time of the circuit breaker and prolonging the service life of the circuit breaker.

Description

technical field [0001] The invention relates to the field of switchgear, in particular to an analysis method and a management method for the dynamic load capacity of a circuit breaker. Background technique [0002] A circuit breaker refers to a switching device that can close, carry and break current under normal circuit conditions and can close, carry and break current under abnormal circuit conditions within a specified time. In the field of switchgear, circuit breakers are the main equipment for power distribution control, and are important equipment for extinguishing fault currents and isolating faulty equipment and lines from the grid. When the circuit breaker is turned on, the transmission of electric energy is realized. During the opening process of the circuit breaker, the power transmission is cut off and the fault current is cut off when the grid fails. [0003] During the process of the circuit breaker transmitting electric energy, the circuit breaker uses the r...

AI Technical Summary

Problems solved by technology

[0005] At present, the protection of the power grid and equipment from the perspective of circuit breakers is often judged and driven to open the circuit breaker when the main circuit of the circuit breaker fails or the voltage exceeds the allowable voltage, thereby protecting the power grid and equipment, but there is a lack of circuit breakers. The dynamic load protection method cannot conduct real-time analysis and evaluation based on the nature and magnitude of the main circuit current of the circuit breaker to determine the dynamic load capacity of the circuit breaker, thereby improving system performance and effectively protecting power equipment including circuit breakers

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