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Failure rate calculation method for relay protection device in consideration of covariates

A technology of relay protection and calculation method, which is applied in calculation, electrical digital data processing, instruments, etc., can solve the problem of inability to simulate the relationship between the internal characteristics of equipment failure rate and external working conditions, and achieve the effect of improving reliability

Active Publication Date: 2013-02-27
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

[0005] Aiming at the problem that the failure model of the existing relay protection equipment cannot simulate the relationship between the change of equipment failure rate and its internal characteristics and external working conditions, the invention proposes a relay protection failure model considering covariates, simulating the relay The failure of protection equipment changes with time and other measurement parameters, and calculates the failure rate of relay protection equipment

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  • Failure rate calculation method for relay protection device in consideration of covariates
  • Failure rate calculation method for relay protection device in consideration of covariates
  • Failure rate calculation method for relay protection device in consideration of covariates

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Embodiment Construction

[0012] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0013] figure 1 It is a flowchart of the present invention. figure 1 In the process, considering the internal characteristics of relay protection and its external working conditions, introducing covariates, simulating the failure characteristics of relay protection devices, and calculating the failure rate of relay protection equipment, including:

[0014] Step 1: Use the multiplication model to determine the functional relationship between the failure rate distribution parameters of relay protection and covariates.

[0015] The failure of electronic components may be due to internal or external factors, which can be defined as covariates. Covariates may be other metrics such as operating voltage, current, temperatu...

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Abstract

A failure rate calculation method for a relay protection device in consideration of covariates belongs to the technical field of protection of electric power systems. The method comprises the following steps of: determining the function relationship between relay protection failure rate distribution parameters and the covariates by using a multiplication model; obtaining failure rate distribution functions under the Weibull distribution condition by the function relationship between the parameters and the covariates; and obtaining unknown parameters of the distribution functions through the formula (referring to the Specification) in order to calculate the failure rate of the relay protection device, wherein m and Eta in the formula respectively represent Weibull distribution shape parameters and scale parameters. According to the failure rate calculation method for the relay protection device in consideration of the covariates disclosed by the invention, the failure characteristics of the relay protection device are accurately simulated in consideration of the intrinsic characteristics of the relay protection and the external working conditions thereof, so that the covariates and failure rate calculation method for the relay protection is built. And the method is helpful to find out the principal factors which influence the reliability indexes of the method, and provides the guidance to improve the relay protection reliability.

Description

technical field [0001] The invention relates to a calculation method for the failure rate of a relay protection device considering covariates, and belongs to the field of reliability of relay protection in electric power systems. Background technique [0002] Relay protection equipment is the first line of defense to ensure the safe operation of the power grid, and its reliability is closely related to the safe and stable operation of the power grid. Studying the reliability of relay protection, implementing reliability evaluation of relay protection, and finding out the factors affecting its reliability index can provide certain theoretical guidance for the maintenance of relay protection, improve and improve the reliability of relay protection, and ensure the safety of the power grid Stable operation. [0003] Determining the failure model of the relay protection device is the basis for reliability assessment, and the accuracy of the model directly affects the accuracy of...

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Application Information

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IPC IPC(8): G06F19/00
Inventor 薛安成王宝罗麟王睿琛毕天姝
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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