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Traction power supply system risk assessment method considering relay protection reliability

A traction power supply system and relay protection technology, applied in the field of traction power supply system, can solve problems such as the degree of system risk and lack of theoretical system impact of traction power supply system relay protection that have not been considered, and achieve the goal of reducing risk loss and improving operation level. Effect

Inactive Publication Date: 2018-03-23
CHINA RAILWAYS CORPORATION +2
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Problems solved by technology

However, most of the current research has not considered the degree of risk brought by the relay protection of the traction power supply system to the system, and lacks a certain theoretical system to study the impact of the relay protection system on the traction power supply system

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  • Traction power supply system risk assessment method considering relay protection reliability
  • Traction power supply system risk assessment method considering relay protection reliability
  • Traction power supply system risk assessment method considering relay protection reliability

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Embodiment Construction

[0027] The method of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. The present invention considers the risk assessment method of traction power supply system for relay protection reliability, and its specific steps are as follows:

[0028] Step 1: Risk probability assessment based on Markov state space method

[0029] Considering the hardware and software factors of relay protection comprehensively, the state is divided according to two fault modes of maloperation and refusal to establish a Markov state space model of relay protection system. The hardware misoperation failure rate λ in the hardware module hw , hardware failure rate λ hj , hardware self-test coefficient c, hardware repair rate u h And the non-self-inspection hardware repair rate r and other index values ​​and software failure rate λs, software misoperation failure rate λsw, rejection failure rate λsj and software repair...

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Abstract

The invention discloses a traction power supply system risk assessment method considering relay protection reliability. The method comprises the following steps of building a Markov state space modelof a relay protection system, calculating out a probability of each state of the system according to a Markov state space method, and obtaining a probability Pw of relay protection in a non-self-checkmistake action state and a probability Pj of the relay protection in a non-self-check rejecting action state; classifying risk effects caused by relay protection failure into three types by adoptingpotential FMEA (Failure Mode And Effect Analysis), and quantizing three different economic losses; and calculating risk assessment indexes which are products of risk probabilities and the risk effects, and obtaining traction power supply system risk values of different relay protection faults, different device protection faults and different economic loss types. According to the method, an obtained assessment result assists in mastering the traction power supply system risk degree more comprehensively, guide a traction power supply system maintenance plan and improve the traction power supplysystem operation level.

Description

technical field [0001] The invention relates to the field of traction power supply systems, in particular to a risk assessment method for traction power supply systems considering the reliability of relay protection. Background technique [0002] The safe and reliable operation of the traction power supply and transformation system is of great significance to ensure the normal operation of railways and high-speed railways. With the rapid development of high-speed railway construction, the pressure on the operation and maintenance of my country's railway traction power supply system is gradually increasing. Rapid and accurate fault discovery and diagnosis of accidents that have occurred in the traction power supply and transformation system can shorten the fault processing time and control the scope of fault influence as much as possible; conduct health diagnosis and risk assessment on the current operating status of the traction power supply and transformation system , can h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0635G06Q50/06
Inventor 林圣冯玎杨茜茜高仕斌王贞
Owner CHINA RAILWAYS CORPORATION
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