中国电机工程学报2017，Vol.37Issue(20)：5862-5872,11.DOI:10.13334/j.0258-8013.pcsee.162514
基于并联可调电阻组的直流偏磁柔性治理策略
Flexible Suppression Scheme for DC Bias Based on Adjustable Parallel Resistance
摘要
Abstract
The conventional suppression method for DC bias based on capacitor is easily to accelerate the corrosion of the metal components in the ground of other enterprises,and the responsibility conflict is difficult to mediate.Meanwhile,the conventional switching method of DC blocking devices can easily lead to the current through neutral point of other transformers in regional network over standard passive,due to the lack of consideration of the global distribution of DC current.Therefore,this paper presented a flexible suppression method for DC bias.Firstly,the concept of mean DC was put forward,and a new kinds of DC blocking device based on adjustable parallel resistance was designed.Besides,the mathematical model for global optimal switching of DC blocking devices was established by field-circuit coupling method with the equivalent resistance network of AC system and the location distribution of substations and ground electrodes.Finally,to minimize the global maximum DC current,the optimal scheme was obtained,which can flexible suppress the DC bias.The effectiveness and superiority of this method are verified by comparing the results of conventional method with the actual parameters of Yichang power grid.关键词
直流偏磁/均直/并联可调电阻组/柔性治理/智能算法Key words
DC bias/mean DC/adjustable parallel resistance/flexible suppression/intelligent algorithm分类
信息技术与安全科学引用本文复制引用
谢志成,林湘宁,李正天,郑颖,郭倩雯,熊卫红,薄志谦..基于并联可调电阻组的直流偏磁柔性治理策略[J].中国电机工程学报,2017,37(20):5862-5872,11.基金项目
国家自然科学基金项目(51537003,51577077) （51537003,51577077）
国家电网公司科技项目(适应变电站-网架形态演变趋势的新架构保护关键技术研究与开发).Project Supported by National Natural Science Foundation of China (51537003,51577077) （适应变电站-网架形态演变趋势的新架构保护关键技术研究与开发）
Science and Technology Project of State Grid Corporation of China. （）
