A comprehensive evaluation method for the health degree of the operating state of the station DC system

Abstract

The invention discloses a comprehensive evaluation method for the operating state health degree of a direct-current system for a station. The method includes the following steps that: A, an evaluationindex system taking factors such as equipment health, operation defects, service life, voltage and current operating status of the direct-current system into consideration is built; B, index values are obtained through statistical calculation, and the index values are standardized and normalized; subjective and objective weights are calculated on the basis of an improved analytic hierarchy process and standard deviation and average difference algorithms; and D, and two quantitative evaluation results of the operating state health degree of the direct-current system to be evaluated are obtained through a linear weighting method. According to the comprehensive evaluation method, an evaluation process takes into account not only the subjectivity and objectivity of evaluation, but also embodies the degree of the importance of different evaluation indexes on the evaluation results; the evaluation results tend to be more reasonable and can better distinguish the change process of the healthdegree of the operating state of the system in a more microcosmic and detailed manner; and quantitative basis can be provided for optimal decision-making in the maintenance and repair programs of thedirect-current system.

Description

technical field [0001] The invention relates to the field of quantitative evaluation of the operating state of a power system used in a power system substation, specifically a multi-view comprehensive evaluation method for the operating state of a DC system used in a station, which is suitable for subjectively and objectively refined quantification of the actual operating state of a DC system The evaluation can provide a basis for further DC system operation risk assessment and optimization decision-making of maintenance plan. Background technique [0002] The substation AC and DC power supply system is the provider of intra-station communication, various protection, automation device power supply and operation control power supply. It is the prerequisite for the normal operation of substation intelligent equipment and an important link to ensure the safe and reliable operation of the substation. The AC and DC power supply system is divided into different power modules accor...

AI Technical Summary

Problems solved by technology

However, this evaluation method lacks consideration of the importance of the impact of different degrees of equipment operation defects on the evaluation results in the DC system, resulting in too conservative evaluation results, and the evaluation method also lacks consideration of the real-time operating status of the DC power system.

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