Safety level evaluation method of power grid

A security and power grid technology, applied in the direction of electrical components, circuit devices, AC network circuits, etc., can solve the problems of not considering the consequences and not coordinating safety and economy well
CN101800426BActive Publication Date: 2012-11-07STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST
Publication Date
2012-11-07

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Abstract

The invention relates to a safety level evaluation method a power grid, comprising the following steps of: firstly determining a supposed accident list, and sequentially disconnecting elements of the supposed accident list; after a certain element is disconnected, carrying out topological structure analysis and load flow calculation on a system, and then calculating a power grid loss load risk evaluation index, a power grid overload risk evaluation index, a power grid low voltage risk evaluation index and a power grid voltage collapse risk evaluation index; repeating the process till all the elements of the supposed accident list are completely calculated; and then calculating a system single-risk evaluation index and a system total-risk evaluation index. The invention introduces a risk theory and a utility theory to the safety evaluation of the power grid, separately diagnoses the safety of the system from different side surfaces, further obtains the risk evaluation index of the whole system by an analytic hierarchy process (AHP), obtains simple and clear results and has better discrimination and can reflect the occurrence possibility of different accidental accidents and severity degree of a consequence caused by the accidental accidents.
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Description

technical field

[0001] The invention relates to a method for evaluating the safety level of a power grid, and belongs to the application field of the electrical industry. Background technique

[0002] The research on power system security has gone through three main stages: deterministic assessment method, probabilistic assessment method and risk assessment method. 1. Deterministic safety assessment methods have been widely used in the power industry, but the use of this method must pay extra costs, and the results are too conservative because only the most serious and most credible accidents are emphasized. Therefore, from an operational point of view, the existing equipment is not fully utilized; from a planning point of view, unnecessary duplication of construction is caused. With the gradual rise of the power market, under the fierce competition, various power suppliers are reluctant to invest in new equipment, but are more willing to expand the transmission limit of ex...

Claims

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