基于多源异构信息融合的VSC-HVDC小电流接地故障检测算法  

VSC-HVDC Low-Current Ground Fault Detection Algorithm Based on Multi-Source Heterogeneous Information Fusion

作　　者：戴月明 应晓娟 吕兆康 冯超 DAI Yueming;YING Xiaojuan;LV Zhaokang;FENG Chao(Stade Grid Zhejiang Yongkang Power Supply Company,Yongkang Zhejiang 321300,China;Yongkang Guangming Electric Power Transmission&Transformation Co.,Ltd.,Yongkang Zhejiang 321300,China)

机构地区：[1]国网浙江省电力有限公司永康市供电公司,浙江永康321300 [2]永康市光明送变电工程有限公司,浙江永康321300

出　　处：《电子器件》2024年第6期1595-1600,共6页Chinese Journal of Electron Devices

基　　金：中国电力科学研究院有限公司“高比例新能源电力系统长时间尺度功率平衡能力研究”项目(5100-202055391A-0-0-00)。

摘　　要：针对小电流接地故障的故障特征不明显,故障检测难度较高的问题,研究了一种基于多源异构信息融合的VSC-HVDC小电流接地故障检测算法。结合VSC高频动态模型与VSC低频动态模型建立三相静止坐标系的VSC-HVDC相关数据的数学模型,在此基础上,选取D-S证据融合理论利用数据模型得到的VSC-HVDC系统的电气特征量、非电气特征量、电气量故障数据以及非电气量等多源异构信息进行数据融合;再利用模极大值和反向行波获取VSC-HVDC小电流接地故障检测结果。实验结果表明,所提算法可以有效检测VSC-HVDC小电流接地故障,实现小电流接地故障点的精准定位。Targeting at the problem that the fault characteristics of small current grounding fault are not obvious and the fault detection is difficult, a VSC-HVDC small current grounding fault detection algorithm based on multi-source heterogeneous information fusion is studied. Combined with VSC high-frequency dynamic model and VSC low-frequency dynamic model, the mathematical model of VSC-HVDC related data in three-phase static coordinate system is established. On this basis, D-S evidence fusion theory is selected, and multi-source heterogeneous information such as electrical characteristic quantity, non electrical characteristic quantity, electrical fault data and non electrical quantity of VSC-HVDC System obtained by data model is used for data fusion. Then the modulus maxima and reverse traveling wave are used to obtain the detection results of small current grounding fault of VSC-HVDC. The experimental results show that the algorithm can effectively detect the small current grounding fault of VSC-HVDC and realize the accurate location of the small current grounding fault point.

关 键 词：多源异构 接地故障 信息融合 VSC-HVDC 小电流 检测算法 

分 类 号：TM734[电气工程—电力系统及自动化]