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Multi-mode hidden-fault risk analysis method of relaying protection system

A technology for hidden faults and relay protection, applied in the fields of electrical digital data processing, instruments, calculations, etc., can solve problems such as failure to fully reflect the loss of fault consequences, and achieve the effect of improving calculation accuracy and reliability

Active Publication Date: 2014-01-01
POWER DISPATCHING CONTROL CENT OF GUANGDONG POWER GRID CO LTD
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Problems solved by technology

In actual power grid N-k faults, the consequential loss index cannot fully reflect the consequential loss of the fault

Method used

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  • Multi-mode hidden-fault risk analysis method of relaying protection system
  • Multi-mode hidden-fault risk analysis method of relaying protection system
  • Multi-mode hidden-fault risk analysis method of relaying protection system

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Embodiment Construction

[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0031] The invention belongs to the field of relay protection and risk analysis of electric power systems, and in particular relates to a modeling analysis of hidden faults in a relay protection system and a risk analysis method for evaluating hidden fault risks. The purpose of the invention is to carry out risk analysis on the hidden faults of the relay protection system. By analyzing the hidd...

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Abstract

The invention belongs to the field of relaying protection and risk analysis of power systems, and discloses a multi-mode hidden-failure risk analysis method of a relaying protection system. The method comprises the steps of building a multi-mode hidden-failure model of the relaying protection system; according to the multi-mode hidden-failure model, performing risk analysis on power grid N-k failures caused by relaying protection hidden failures, and obtaining risk index values of hidden failures of the relaying protection system. According to the method, simplified modeling analysis is performed on the hidden failures of the protection system; the multi-mode hidden-failure model is built by analyzing the characteristics of protection hidden failures with various typical modes; a power N-k grid failure analysis method is provided by aiming at the risk analysis problem of the hidden failures. An N-k failure probability solving method based on an improved functional group decomposition method and an event tree analysis method is adopted during the analysis, and corresponding cascading failure risk indexes are set up; the calculation accuracy of the power grid N-k failure probability is improved, and risk assessment and analysis can be performed on the hidden failures of the relaying protection system.

Description

technical field [0001] The invention belongs to the field of relay protection and risk analysis of electric power systems, and more specifically relates to a multi-mode hidden fault risk analysis method of a relay protection system. Background technique [0002] The relay protection system is an important defense line of the power system, which is related to the safe and stable operation level of the power grid. Due to the influence of various factors such as the equipment itself and the external environment, the protection system often has certain hidden faults. The hidden failure of protection (Hidden Failure HF) is defined as a persistent defect in the protection system: under normal circumstances, the defect is not exposed and perceived. However, it will be triggered when the system fails or has an abnormal operating state, resulting in incorrect action of the protection device. Several blackouts have shown that hidden faults in protection systems played a role in fuel...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 邱建朱林李一泉石东源陈志光孙光曾耿晖周特军黄明辉张弛
Owner POWER DISPATCHING CONTROL CENT OF GUANGDONG POWER GRID CO LTD
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