基于拓扑结构分析的多端直流系统转换开关参数优化  

Parameter Optimization of Multi-terminal DC System Transfer switch Based on Topology Analysis

作　　者：李倩 陈海永 甘卿忠 朱博[1] 黄华[1] Li Qian;Chen Hai-yong;Gan Qing-zhong;Zhu Bo;Huang Hua

机构地区：[1]中国南方电网超高压输电公司广州局,广东广州510405

出　　处：《电力系统装备》2021年第23期5-6,172,共3页Electric Power System Equipment

摘　　要：多端直流系统的拓扑结构和运行方式直接影响转换开关的分断电流参数和操作次序。在明确钳制电位接地点的条件下建立多端直流系统接地回路的拓扑结构图,针对对称双极接线方式下不同结构多端直流电网金属—大地回线转换过程中遇到的转换电流和分断次序最优化选取问题,给出了相应的解决方案,并结合三端特高压直流输电工程进行了仿真验证。The topology and operation mode of the multi-terminal DC system directly affect the breaking current parameters and operation sequence of the transfer switch.Establish the topological structure diagram of the ground loop of the multi-terminal DC system under the condition of the grounding point of the clamped potential,and optimize the switching current and the breaking sequence encountered in the conversion process of the metal-earth loop of the multi-terminal DC grid with different structures under the symmetrical bipolar connection mode The problem is selected,the corresponding solution is given,and the simulation verification is carried out in combination with the three-terminal UHV DC transmission project.

关 键 词：直流转换开关 多端直流输电 拓扑结构分析 分断电流 

分 类 号：TM721.1[电气工程—电力系统及自动化]