Full-voltage grade reliability evaluation method considering action of separation device

Abstract

The invention relates to a full-voltage grade reliability valuation method in an electric system. According to the method, power grid topology is analyzed, a power grid is divided into an electric generation system, a power transmission system and a transformer substation main wiring and power distribution system, reliability evaluation is carried out on the electric generation system and the power transmission system under the full load condition, a specific topological structure of the power distribution system is taken into consideration to search for a common-mode related device of a separation device, a common mode failure table of the separation device is formed, reliability indexes of the common-mode related device of the separation device are evaluated, reliability indexes of nodes of the electric generation system and the power transmission system are used as equivalent source parameters of the power distribution system, the reliability indexes of the common-mode related device of the separation device in the step 3 are taken into consideration to determine the reliability indexes of the power distribution system, and finally the reliability indexes of full-voltage grade are determined. The full-voltage grade reliability evaluation method can achieve reliability evaluation of full-voltage grade, and the reliability evaluation level of the electric system can be improved.

Description

technical field [0001] The invention relates to a method for assessing reliability of all voltage levels in a power system, and belongs to the technical field of reliability analysis of power systems. Background technique [0002] Power system reliability is the application of reliability theory in power systems, and it is a measure of the power system's ability to continuously supply power and energy to power users in accordance with acceptable quality standards and required quantities. According to the content of power system reliability assessment, the theoretical research on power system reliability is divided into three levels: the first level is the reliability assessment of the power generation system, the second level is the reliability assessment of the combined power generation and transmission system, and the third level is the power generation system. , Power system reliability assessment including power transmission system and power distribution system. The pow...

AI Technical Summary

Problems solved by technology

In terms of the reliability evaluation of the full voltage level, the existing method uses the reliability evaluation results of the power generation and transmission system as the power parameter method of the distribution system reliability evaluation, which can effectively reduce the difficulty of unified evaluation, but the algorithm is based on the test system, and the structure is relatively It is simple and cannot reflect the complexity of real power grids including multiple voltage levels and multiple types of electrical equipment

[0003] The power supply reliability of the radiation grid is relatively poor, because most of the equipment is connected in series, especially the load at the end of the grid, and most equipment failures in the grid will cause power outages at the end load points

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