Multi-information fusion circuit breaker state monitoring method and system thereof

Abstract

The invention discloses a multi-information fusion circuit breaker state monitoring method and a system thereof. The method is characterized by during application, firstly, according to a rated breaking current and an interrupting capacity of a circuit breaker, determining a relation curve between breaking times allowed by a circuit breaker contact point and a tripping current; then, after the circuit breaker is disconnected every time, based on the relation curve, calculating a loss rate corresponding to disconnection of this time of the circuit breaker; accumulating the loss rates of disconnection of several times and acquiring a current total loss rate; if the current total loss rate reaches an alarm value, generating circuit breaker contact head wearing alarm data; and finally fusing the current total loss rate of the circuit breaker, the circuit breaker contact head wearing alarm data and protection measurement and control data into same IEC61850 model data and sending to a monitoring background. In the invention, on-line monitoring precision of a circuit breaker state can be increased to a certain degree; an access quantity of transformer substation control layer equipment is reduced; and operation cost of a transformer substation is decreased.

Description

technical field [0001] The invention relates to the technical field of electric power automation, in particular to a multi-information fusion circuit breaker state monitoring method and system. Background technique [0002] The normal operation of the circuit breaker affects the stable operation of the substation as a whole. The maintenance cycle of the circuit breaker equipment is generally determined according to the number of breaking times provided by the manufacturer. At present, the status monitoring of primary equipment mainly relies on various sensors. With the in-depth promotion of domestic smart substation technology, the online monitoring and maintenance technology of primary equipment status such as transformers and GIS switches in substations is becoming more and more stable and mature. The establishment of the IEC61850 standard enables the information of the circuit breaker status monitoring intelligent electronic equipment in the substation bay layer to be emb...

AI Technical Summary

Problems solved by technology

[0005] (1) The online monitoring algorithms of each manufacturer are different, and the actual monitoring effect of the equipment needs to be further improved;

[0006] (2) Configuring multiple online monitoring IED devices not only increases the cost in the station, but also affects the stability of the station control layer network

IED equipment such as online monitoring, protection, and measurement and control are all connected to the station control layer network, which has a certain impact on the stability of the existing network. If the online monitoring device and the system are independently networked, the construction and operation costs of the substation will inevitably increase.

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