基于主客观融合赋权的新能源场站暂态电压支撑能力综合评估方法

A Comprehensive Evaluation Method for Transient Voltage Support Capability of Renewable Energy Stations Based on Subjective-Objective Integrated Weighting

中文关键词:新能源场站  主客观融合赋权  暂态电压支撑能力

keywords:new energy stations  subjective-objective integrated weighting  transient voltage support capability

中文摘要:准确评估新能源场站的暂态电压支撑能力可有效应对新能源汇集区的连锁脱网事故。现有研究采用单一赋权方法，难以准确、全面地衡量暂态电压支撑能力。考虑了动、静态指标的影响，提出了一种基于主客观融合赋权的新能源场站暂态电压支撑能力综合评估方法。首先，分析了动、静态指标对暂态电压支撑能力的关联关系；其次，运用层次分析法获得各指标的主观权重，结合改进熵权法所计算的客观权重，构建了主客观融合的综合权重体系。最后，基于实际案例进行分析，分析结果表明，该方法能够准确量化评估新能源场站的暂态电压支撑能力，可有效识别电压薄弱点，为预防因暂态电压引起的新能源连锁脱网事故提供了理论依据和分析方法。

Abstract:Accurate evaluation of the transient voltage support capability of renewable energy stations can effectively mitigate cascading tripping incidents in renewable energy collection areas. However，existing studies adopting single weighting methods cannot evaluate the transient voltage support capability comprehensively and accurately. Considering the influences of both dynamic and static indicators，this paper proposes a comprehensive evaluation method for the transient voltage support capability of renewable energy stations based on subjective-objective integrated weighting. Firstly，the correlation between dynamic and static indicators and the transient voltage support capability is analyzed. Secondly，the analytic hierarchy process （AHP） is adopted to determine the subjective weight of each indicator，and combined with the objective weights calculated by an improved entropy weight method，a comprehensive weighting system integrating subjective and objective factors is established. Finally，the results of case studies show that the proposed method can accurately quantify the transient voltage support capability of renewable energy stations and effectively identify voltage weak points，thus providing a theoretical basis and analytical methods for preventing cascading tripping accidents caused by transient voltage problems.