Risk assessment method and device for relay protection setting system
A protection device and relay protection technology, applied in the field of power systems, can solve problems such as chain tripping, and achieve the effects of high reliability, accurate reflection, and simple failure analysis.
Active Publication Date: 2022-07-19
GUANGXI POWER GRID CORP
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Problems solved by technology
[0003] Relay protection often exists in the power grid in the form of protection devices, and most of the protection devices have a cooperative relationship with the upper and lower levels. The refusal or malfunction of one protection device may cause sequential actions of other protection devices, or even Cascade trip risk
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[0018] The following describes in detail the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to be used to explain the present application, but should not be construed as a limitation to the present application.
[0019] At present, the research on the reliability and operation risk of the relay protection system is mostly described by the protection correct action rate, the malfunction rate and the refusal rate. These indicators are all from the statistical level to reflect the overall long-term average reliability of the relay protection. , is a statistical value obtained through long-term historical data statistics. It can be seen that the existing risk index evaluation...
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The present application discloses a risk assessment method and device for a relay protection setting system. The method includes: determining at least one protection device to be evaluated and its malfunction source; calculating the probability of failure of each hardware system for each protection device to be evaluated; traversing all protections in the corresponding malfunction source of each protection device to be evaluated, according to The fixed value and the measured value of the characteristic quantity corresponding to each protection device to be evaluated, calculate the probability of each principle failure of each protection device to be evaluated; For the probability of each principle failure, determine the failure probability of each protection device to be evaluated; calculate the loss load of each protection device to be evaluated after each failure occurs; Risk assessment of the relay protection setting system. The present application can more accurately reflect the characteristics of the relay protection and the actual risk factors of the operating environment.
Description
technical field [0001] The present application relates to the technical field of power systems, and in particular, to a risk assessment method and a risk assessment device for a relay protection setting system. Background technique [0002] As the first line of defense to protect the security of the power grid, the reliable operation of the relay protection system is of great significance to the security and stability of the power system, but its refusal and malfunction are also one of the important factors to trigger and accelerate the system disturbance. With the increasing requirements for secondary automatic devices in the power system, the technology and management level of protection reliability and risk assessment still need to be improved, and the basic data accumulation and mining of protection reliability, reliability and risk assessment and reliability enhancement are systematically carried out. It is of great significance to strengthen the protection reliability ...
Claims
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IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0635G06Q50/06
Inventor 黄超蒙亮田君杨杨彦刘斌何洪李海勇覃丙川巫聪云韩冰秦蓓孙翔
Owner GUANGXI POWER GRID CORP