Quantitative evaluation method for security risk of operation of power network

Abstract

The invention provides a quantitative evaluation method for the security risk of the operation of a power network. The method comprises the following steps: establishing a risk evaluation model, wherein the risk value of the power network is equal to a product of a consequence value and a probability value; determining the category of influence divisor items needing to participate in risk evaluation, and obtaining the weight value between influence divisor sub-items contained by each screened influence divisor item; according to harmful factors of the power network needing assessment, selecting corresponding influence divisor sub-items from each influence divisor item participating in the risk assessment, multiplying the selected influence divisor sub-items to obtain the probability value, and multiplying the probability value with the consequence value to obtain the risk value of the power network when the harmful factors occur in the power network. The method disclosed by the invention has higher scientificity and higher accuracy of the risk assessment, and reasonable quantitative evaluation can be performed on the risk and can be used as an objective measurement basis for guiding the actual production of electric power.

Description

technical field [0001] The invention belongs to the technical field of power grid safety assessment, and in particular relates to a quantitative assessment method for power grid operation safety risk. Background technique [0002] In recent years, my country's power grid has developed rapidly, and all walks of life in the society have higher and higher requirements for the safe and stable operation of the power grid. Once the power grid fails, the economic losses and social impact caused by it will become greater and greater. Therefore, an effective risk assessment of the power grid is carried out, that is, a risk assessment based on hazard factors that exists within a period of time caused by equipment outages, platform tests, equipment abnormalities, etc.; then, on the basis of the risk assessment, each unit formulates Power grid risk control measures within the scope of jurisdiction, including technical measures and organizational measures, etc., reduce the severity of th...

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, qualitative methods are mainly used for problem-based risk assessment of the power grid, which has problems such as inaccurate risk assessment results and strong subjectivity, and it is difficult to meet the current needs of relevant units for power grid risk assessment

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