中国电机工程学报2018，Vol.38Issue(9)：2609-2621,13.DOI:10.13334/j.0258-8013.pcsee.170617
基于动态权重修正D-S证据理论的最后断路器多判据保护跳闸策略
Tripping Strategy of Multi Criteria of Last Breaker Protections Based on Dynamic Weight Correction D-S Evidence Theory
摘要
Abstract
The last breaker protection is one of the most important protection of high voltage direct current (HVDC) transmission system. Due to various operation scenarios of HVDC, single criterion of last breaker protection cannot suit every scenario. The "2-out-of-3" voting strategy is often used in practice to integrate multiple protection criteria, however, it is possible that the majority of criteria make mistakes in some scenarios, which may reduce the correct-judgement rate of"2-out-of-3" voting strategy. Combining with the existing arrester based last circuit breaker protection and two kinds of improved protections, a tripping strategy of arrester based last breaker protections based on dynamic weight correction D-S evidence theory was designed to integrate different results in this paper. According to the weight coefficient obtained by previous two protection actions, D-S evidence theory was used to integrate the results of different criteria, so as to improve the correct rate of protection in various scenarios. At last, by constructing a simplified simulation model of ±800kV"Xiangjiaba-Shanghai" ultra high voltage direct current (UHVDC) transmission system, the accuracy of the proposed strategy and other combining methods were compared in 1000 cases and other 12 cases, the accuracy rates are 98. 5％ and 50％ respectively, both of them are the highest among all the methods, thus the effectiveness and superiority of the proposed strategy are verified.关键词
特高压直流输电系统/最后断路器保护/信息融合/动态权重修正/D-S证据理论Key words
ultra high voltage direct current (UHVDC)/last breaker protection/multi information integration/dynamic weight correction/D-S evidence theory分类
信息技术与安全科学引用本文复制引用
林湘宁,刘畅,汪致洵,谢志成,何英发,李正天,童重立,邓科,黄景光..基于动态权重修正D-S证据理论的最后断路器多判据保护跳闸策略[J].中国电机工程学报,2018,38(9):2609-2621,13.基金项目
国家自然科学基金项目(51477090，515770777) （51477090，515770777）
中央高校基本科研业务费专项资金资助(HUST:2014QNRC042) （HUST:2014QNRC042）
国家电网公司科技项目(SGTYHT/15-JS-191).Project Supported by National Natural Science Foundation of China (51477090，51577077) （SGTYHT/15-JS-191）
Fundamental Research Funds for the Central Universities (HUST:2014QNRC042) （HUST:2014QNRC042）
Science and Technology Project of State Grid Corporation of China (SGTYHT/15-JS-191). （SGTYHT/15-JS-191）
