中国电机工程学报2017，Vol.37Issue(24)：7133-7142,10.DOI:10.13334/j.0258-8013.pcsee.162513
基于隔直装置全局优化投切的直流偏磁治理方法
Suppression Method for DC Bias Based on Global Optimal Switching Method of Blocking Devices
摘要
Abstract
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. To effectively guide the suppression of DC bias, an optimization approach for the switching of DC blocking devices was presented. Firstly, the model scope of AC system was determined by the attenuation law of DC voltage in the soil. 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, the optimal scheme can be obtained by minimizing the maximum DC current through the neutral point of transformer. With the actual parameters of Yichang power grid, the superiority of the proposed method (optimizing by exhaustive method) is verified by comparing the result of conventional method. Furthermore, in order to ensure the efficiency of optimization when the scale of AC system is enlarged, various intelligent algorithms are used to solve the optimization problem which verify that the result of intelligent algorithm can also approximated to that of the exhaustive method.关键词
直流偏磁/隔直装置/优化投切/场–路耦合/穷举法/智能算法Key words
DC bias/DC blocking device/optimal switching/field-circuit coupling/exhaustive method/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,Muhammad Shoaib Khalid,Owolabi Sunday Adio,薄志谦..基于隔直装置全局优化投切的直流偏磁治理方法[J].中国电机工程学报,2017,37(24):7133-7142,10.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. （）
