Method for evaluating operation risk degree of power distribution network

A technology of hazard degree and evaluation method, applied in the field of distribution network, can solve the problems of inability to study the uncertainty of hazard sources, difficult to determine the network topology, questioning the reliability of evaluation results, etc., so as to overcome the subjectivity and increase accuracy. Sexuality, the effect of enhancing credibility

Pending Publication Date: 2021-02-26
ECONOMIC TECH RES INST OF STATE GRID HENAN ELECTRIC POWER +1
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  • Claims
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Problems solved by technology

At present, when evaluating the hazard source evaluation system, the commonly used methods include probabilistic risk analysis method, multi-level gray comprehensive evaluation method, fuzzy comprehensive evaluation method, neural network evaluation method, etc., but each has its own shortcomings: the probabilistic risk analysis method The analysis is based on the failure probability of component-level hazard sources, and the uncertainty of hazard sources cannot be studied
Fuzzy evaluation methods and gray evaluation methods have solved the problem of describing the uncertainty of hazards to a certain extent, but because probability theory, fuzzy mathematics and gray system theory are relatively independent branches, it is difficult to integrate them into the same framework
The neural network evaluation method has shortcomings such as long training time, difficult to determine the topology of the network, and the training effect is greatly affected by the initial parameters, which makes the reliability of the evaluation results questioned.

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  • Method for evaluating operation risk degree of power distribution network
  • Method for evaluating operation risk degree of power distribution network
  • Method for evaluating operation risk degree of power distribution network

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Embodiment Construction

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0037] The evaluation method of the risk degree of distribution network operation in a certain area, such as figure 1 shown, including the following steps:

[0038] Step 1: Obtain the types of hazard sources in distribution network operation, and establish a hazard source factor set

[0039] Constructable risk source factor set U={u 1 , u 2 ,...,u 17}, where u 1 , u 2 ,...,u 17 Representing figure 2 The 17 hazard evaluation indicators in the

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Abstract

The invention discloses a method for evaluating the operation risk degree of a power distribution network, and the method comprises the following steps: obtaining the types of risk sources, and establishing a risk source factor set; establishing a risk source factor occurrence frequency evaluation set and a risk source factor influence degree evaluation set; establishing a comprehensive credibility evaluation matrix of the risk source factor occurrence frequency, calculating a risk source factor occurrence frequency credibility entropy, and determining the weight of each risk source factor occurrence frequency; establishing a comprehensive credibility evaluation matrix of the risk source factor influence degree, calculating the risk source factor influence degree credibility entropy, and determining the weight of each risk source factor influence degree; calculating the occurrence frequency measure of the risk source event and the influence measure of the dangerous source event; calculating the operation risk degree of the power distribution network; determining a confidence interval of a risk degree value, and analyzing and evaluating the risk degree for operation of the power distribution network; according to the power distribution network operation risk assessment device, subjective analysis results are objectively analyzed and processed, and the credibility of the weight is enhanced, so that the accuracy of power distribution network operation risk assessment is improved.

Description

technical field [0001] The invention relates to the technical field of distribution network, in particular to a method for evaluating the risk degree of distribution network operation. Background technique [0002] The safe operation of electric power and distribution network is of great significance in the development of national economy. With the development of society, the coverage of the power grid is getting wider and wider, and the operating environment of the power system is becoming more and more complex, which puts forward higher requirements for the safe operation of power and distribution networks. If the distribution network cannot maintain a safe and stable operation, it will have a major impact on the safety of the power grid, social construction and production safety, and even the development of the national economy. Therefore, it is of great practical significance to identify possible hazard sources in the operation of distribution network and then evaluate ...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0635G06Q50/06
Inventor 李勇杰杨红旗刘湘莅郭新菊齐道坤李大鹏李旭阳李凌云康艳芳郭晓菡张俊波周铁军卫璞牛鑫徐扬
Owner ECONOMIC TECH RES INST OF STATE GRID HENAN ELECTRIC POWER
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