Circuit breaker state online diagnosis method and system based on PMU (Phasor Measurement Unit) data

A technology of circuit breaker status and diagnosis method, applied in data processing applications, instruments, resources, etc., can solve the problems of online assessment of circuit breaker operation status, high installation cost, complex diagnosis method, etc., to achieve high adaptability and accurate assessment results , the effect of improving practical operability

Active Publication Date: 2018-04-06
STATE GRID LIAONING ELECTRIC POWER RES INST +2
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Problems solved by technology

[0003] However, for the circuit breaker on-line monitoring and diagnosis system, various sensors are generally installed on the circuit breaker body, and the circuit breaker diagnosis is realized through the data collected by various sensors. This method has the disadvantages of high i...

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  • Circuit breaker state online diagnosis method and system based on PMU (Phasor Measurement Unit) data
  • Circuit breaker state online diagnosis method and system based on PMU (Phasor Measurement Unit) data
  • Circuit breaker state online diagnosis method and system based on PMU (Phasor Measurement Unit) data

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Embodiment Construction

[0051] The specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0052] Each PMU in the power network of the present invention can perform synchronous data collection through the GPS time synchronization system, and then transmit the obtained node voltage and current phasor information to the local area network, and then transmit it to the data collection center through the fiber channel, and extract the power grid from the PMU device Run electrical parameters, perform signal processing on the acquired electrical parameters to obtain characteristic parameters that characterize the state of electrical equipment, and then implement online fault diagnosis of electrical equipment through advanced algorithms. figure 1 Shown.

[0053] The PMU data-based circuit breaker operating state evaluation index system provided by the present invention is as follows figure 2 As shown, the present invention proposes a...

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Abstract

The invention discloses a circuit breaker state online diagnosis method and a system based on PMU (Phasor Measurement Unit) data, which relate to the technical field of power system circuit breaker protection. A grey target theory is introduced to circuit breaker state diagnosis, the irrationality of adopting a weight average algorithm to calculate the approaching degree by the traditional grey target theory is improved, a hierarchy-entropy weight combined weight calculation method is put forward, the influence weight of each index for an evaluation result is solved, advantages of the two aretaken to remedy disadvantages of each, both subjective and objective factors are considered, defects of a single assignment method are avoided, weight determination is thus more rational, the safe andreliable operation is very important for improving reliable power supply of the power grid, and a basis is laid for realizing state maintenance for the circuit breaker.

Description

Technical field [0001] The invention relates to the technical field of power system open circuit protection, in particular to a method and system for on-line diagnosis of circuit breaker states based on PMU quantities. Background technique [0002] Phasor Measurement Unit (PMU) is a device used to measure and output synchronized phasor and perform dynamic recording. The PMU in the power system synchronously collects sub-second analog voltage and current signals from GPS, obtains the amplitude and phase angle of the voltage and current signals, and transmits them to the data concentrator in the dispatch center, where the entire power grid can be obtained The synchronized phasors are used for real-time monitoring, protection and control, and are widely used in all aspects of the power system wide-area measurement system. How to use PMU data to monitor the state of circuit breakers used on a large scale in the power grid plays a very important role. [0003] However, the circuit bre...

Claims

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Application Information

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IPC IPC(8): G06Q10/00G06Q10/06G06Q50/06
CPCG06Q10/06393G06Q10/20G06Q50/06
Inventor 葛维春刘树鑫张艳军高凯葛延峰何晓洋李铁张建刘凯刘扬
Owner STATE GRID LIAONING ELECTRIC POWER RES INST
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