A Reliability Evaluation Method for Power System Partitions

Abstract

The invention relates to a power system partition reliability evaluation method. The method comprises the steps of inputting the data of a to-be-evaluated power grid, marking the partition of a power system in a power grid topology structure to respectively marking out five regions in the power system, grading the rates of the five regions according to the sizes of loads, evaluating the reliability of the power grid at all voltage levels based on the Monte Carlo Simulation method, recording the result of the reliability evaluation, conducting the statistics on the accident information in each region according to the result of the reliability evaluation, classifying accidents based on the two standards of the out-of-load ratio and the power-outage user ratio, calculating the accident risk index value of the power grid, and adopting the obtained index value as the result of the reliability evaluation in each region of the power grid. According to the technical scheme of the invention, during the planning and running stage of the power grid, the risk levels of the power grid at different accident levels can be evaluated, so that improvement measures are conveniently and correspondingly provided for the power system. Therefore, the risk of the system is reduced. Meanwhile, the power supply capability of the power system is improved.

Description

technical field [0001] The invention belongs to the technical field of power system reliability analysis, in particular to a power system reliability evaluation method in the power system. Background technique [0002] According to the extent to which electric power safety accidents (hereinafter referred to as accidents) affect the safe and stable operation of the power system or the normal supply of electric power (heat), accidents are divided into particularly serious accidents, major accidents, major accidents and general accidents (see Order No. 599, "Regulations on Emergency Response and Investigation and Handling of Electric Power Safety Accidents"). In order to ensure the safe operation of electric power, it is necessary to take preventive measures against accidents to prevent and avoid accidents. Power companies need to assess the risk of grid accidents in order to prevent accidents when planning and operating the grid. In this regard, power system reliability is t...

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Problems solved by technology

[0004] Most of the existing reliability assessment methods divide the power system into power generation system, power generation and transmission synthesis system, power distribution system and substation main wiring system for evaluation separately, and only conduct risk assessment for each system as a whole, ignoring the reliability of different partitions in the system. sex level difference

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