中国电机工程学报2017，Vol.37Issue(12)：3400-3408,9.DOI:10.13334/j.0258-8013.pcsee.161221
基于电压-能量反比特性的避雷器型最后断路器保护优化策略研究
Study of Improved Arrester Based Last Circuit Breaker Protection Strategy Based on Voltage-Energy Inverse Proportional Characteristics
摘要
Abstract
The last circuit breaker protection is used for preventing the adverse effect on equipment caused by severe over-voltage when all the AC loads in the inverter side are shedding.In addition to conventional last circuit breaker protection,UHVDC convertor station is also equipped with arrester based last circuit breaker protection as backup protection.However,problem also exists on arrester based last circuit breaker protection for its adaptability of action speed under different over-voltage factors.To cover the deficiency of the existing method,firstly,instead of constant,the power integration of arrest was obtained by using real-time voltage,which form an improved arrest-based last circuit breaker protection.Besides,in order to improve the performance of the protection,a dynamic setting strategy of threshold based on the inverse characteristic of voltage and energy was proposed.Secondly,an UHVDC simulation model was established according to the actual parameters of Xiangjiaba-Shanghai UHVDC transmission system,which meet the demand of research.A series of simulation examples show that the improved method can shorten the duration time of equipment withstanding severe over-voltage under the premise of guaranteed operating reliability,which can protect the equipment in safe.关键词
最后断路器保护/实时电压/电压-能量反比特性/动态整定Key words
last circuit breaker protection/real-time voltage/inverse characteristic of voltage and energy/dynamic setting分类
信息技术与安全科学引用本文复制引用
林湘宁,何英发,谢志成,李正天,童重立,谭爱国,Muhammad Shoaib Khalid..基于电压-能量反比特性的避雷器型最后断路器保护优化策略研究[J].中国电机工程学报,2017,37(12):3400-3408,9.基金项目
国家自然科学基金项目(51277082,51577077).Project Supported by National Natural Science Foundation of China (51277082,51577077). （51277082,51577077）
