中压配电网的高可靠性接线模式综合评估方法

Research on Comprehensive Evaluation Method of High Reliability Wiring Mode for Medium Voltage Distribution Network

为解决高可靠性地区的中压配电网接线模式在规划设计时评价指标多样、没有统一标准的问题,针对中压配电网的高可靠性接线模式综合评估方法展开研究。首先,从可靠性、经济性、技术性和适应性4个方面构建了高可靠性接线模式的综合评估指标体系;其次,采用DEMATEL-ANP-反熵权法和改进灰色关联度法确定各评估因素的权重;接着,采用多项式差值法构成高可靠性接线模式的指标评分函数;最后,结合江苏某A类区域高可靠性改造工程,对单环网接线、双环网接线、花瓣形接线和含柔直合环的三路同供接线模式进行综合评估和比较分析,研究结果表明含柔直合环的三路同供接线模式的可靠性、适用性较高,最终综合评分较高,符合工程实际,验证了综合评估方法的可行性和有效性。

In order to solve the problem that there are too many evaluation indicators and no unified standards for planning and design of medium-voltage distribution network wiring mode in high-reliability area,this paper studies the comprehensive evaluation method of high-reliability wiring mode for medium-voltage distribution network.Firstly,a comprehensive evaluation indicator system of high-reliability wiring mode is constructed from four aspects:reliability,economy,technology and adaptability.Secondly,the DEATEL-ANP-anti-entropy weight method and improved gray correlation method are used to determine the weights of each evaluation indicator.And then,the polynomial difference method is used to analyze the indicator rating function of high-reliability wiring mode.Finally,based on a high-reliability renovation project in a type A area in Jiangsu,a comprehensive evaluation and comparative study is carried out on the single-ring network wiring,double-ring network wiring,petal type wiring and three-way for same supply wiring mode with flexible DC loop.The results show that the three-way for same supply wiring mode with flexible DC loop has higher reliability and applicability with high comprehensive ratings,which conforms to the engineering reality,and proves the feasibility and effectiveness of the proposed comprehensive evaluation method.