基于改进G1-CRITIC的直流多馈入受端系统故障筛选与排序  

Fault Screening and Sorting of DC Multi-infeed Receiving End System Based on Improved G1-CRITIC Method

作　　者：王源[1] 姜懿郎 王长江[1] 韩奕 WANG Yuan;JIANG Yilang;WANG Changjiang;Han Yi(Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology,Ministry of Education(Northeast Electric Power University),Jilin 132012,China;China Electric Power Research Institute,Beijing 100192,China)

机构地区：[1]现代电力系统仿真控制与绿色电能新技术教育部重点实验室(东北电力大学),吉林132012 [2]中国电力科学研究院有限公司,北京100192

出　　处：《电力系统及其自动化学报》2021年第12期43-52,共10页Proceedings of the CSU-EPSA

基　　金：国家电网有限公司总部管理科技项目(5104-202055128A-0-0-00)。

摘　　要：为了快速、准确地实现直流多馈入受端系统交流故障筛选与排序,本文提出一种基于改进序关系分析-基于指标相关性的指标权重确定的直流多馈入受端系统故障筛选与排序方法。首先,为多层次、多角度表征直流多馈入受端系统的故障特性,构建了暂态电压稳定、功角稳定、极限切除时间、平均三相短路电流过流率、潮流转移熵和多馈入有效短路比6个维度的综合评价指标;其次,为合理量化主观因素与客观因素所占权重,综合考虑电网运行人员的经验和指标数据的客观信息,借助改进序关系分析法和基于指标相关性的指标权重确定方法计算主观及客观权重,通过逼近理想解排序法计算各故障线路与理想解的相对贴进度,依据相对贴近度的大小实现故障筛选与排序;最后,通过华东电网实际系统的仿真分析,验证所提方法的有效性和实用性。To quickly and accurately realize the AC fault screening and sorting of a DC multi-infeed receiving end system,a fault screening and sorting method based on the improved order relation analysis(G1)-criteria importance through intercriteria correlation(CRITIC)method is proposed.First,to characterize the fault characteristics of the DC multi-infeed receiving end system from multiple levels and multiple angles,six comprehensive evaluation indexes are constructed,including the transient voltage stability,power angle stability,limit clearing time,average three-phase short-circuit current over flow rate,power flow transfer entropy and multi-infeed effective short-circuit ratio.Then,to reasonably quantify the weights of subjective and objective factors,the experiences of power grid operators and the objective information of index data are comprehensively considered,and the subjective and objective weights are calculated by means of the improved G1-CRITIC method.The relative closeness coefficient between each faulty line and the ideal solution is calculated by the technique for order preference by similarity to ideal solution(TOPSIS),according to which the fault screening and sorting is realized.Finally,the effectiveness and practicability of the proposed method are verified through the simulation analysis of an actual system in East China power grid.

关 键 词：改进序关系分析 基于指标相关性的指标权重确定 故障筛选与排序 高压直流输电 

分 类 号：TM712[电气工程—电力系统及自动化]