一种多接地极主动互联及隔直装置协同的直流偏磁治理策略  

Suppression Strategy of DC Bias Based on Coordination Between Grounding Electrodes Interconnecting and DC Blocking Devices

作　　者：戎子睿 马书民 林湘宁[1] 金能[1] 汪致洵 李正天[1] 张培夫 邢家维 RONG Zirui;MA Shumin;LIN Xiangning;JIN Neng;WANG Zhixun;LI Zhengtian;ZHANG Peifu;XING Jiawei(State Key Laboratory of Advanced Electromagnetic Engineering and Technology,(Huazhong University of Science and Technology),Wuhan 430074,Hubei Province,China)

机构地区：[1]强电磁工程与新技术国家重点实验室(华中科技大学),湖北省武汉市430074

出　　处：《电网技术》2021年第9期3453-3462,共10页Power System Technology

基　　金：国家自然科学基金项目(51877088)。

摘　　要：高压直流输电系统在单极不平衡运行时会产生较大的接地极入地电流,严重威胁变压器乃至交流电网的安全稳定运行。研究表明,单纯采用隔直装置全局优化投切、多接地极主动互联等治理方案均无法保证在所有电网交流拓扑变化场景下满足直流偏磁治理要求。为此,提出了一种多接地极主动互联及隔直装置协同的直流偏磁治理策略,对待选方案集满足/不满足治理要求的场景选取了不同的评估指标,采用量子遗传算法和组合赋权法,选取得到所选评估指标下的最优治理方案。基于宜昌地区电网拓扑结构搭建了仿真模型,仿真验证了所提策略的有效性。所提策略可为未来偏磁治理方案的选择提供必要参考。The powerful grounding current generated in the monopolar unbalanced state will seriously threaten the safe and stable operation of the transformer and even the AC grid in the HVDC transmission system. Previous researches show that the suppression schemes such as global optimization switching of blocking devices and grounding electrodes interconnecting cannot guarantee to meet the suppression requirements in all AC topologies. This paper proposes a suppression strategy of DC bias based on the coordination between grounding electrodes interconnecting and DC blocking devices. Different evaluation indexes are selected for the scenarios when the optional schemes meet the suppression requirements or not. Quantum genetic algorithm and the combinatorial weighting method are used to select the optimal suppression scheme based on the evaluation indexes above. Yichang Power Grid is taken as an example to verify the effectiveness of the proposed strategy. The proposed strategy can provide a reference for the selection of bias suppression schemes.

关 键 词：直流偏磁电流 多接地极互联 隔直装置 组合赋权法 全局优化策略 

分 类 号：TM721[电气工程—电力系统及自动化]