基于零序电流TEO梯度能量的光伏场站集电线路故障选线方法  

A New Method for Fault Line Selection of Photovoltaic Power Station Collection Lines Based on TEO Energy

作　　者：郑燃 吴佳毅 杜浩良 潘武略 ZHENG Ran;WU Jiayi;DU Haoliang;PAN Wulue(State Grid Jinhua Electric Power Co.,Ltd.,Jinhua 321000,China;State Grid Zhejiang Electric Power Co.,Ltd.,Hangzhou 310000,China)

机构地区：[1]国网金华供电公司,浙江金华321000 [2]国网浙江省电力有限公司,浙江杭州310000

出　　处：《中国电力》2025年第2期147-153,共7页Electric Power

基　　金：国家自然科学基金资助项目(52077120);国网浙江省电力有限公司科技项目(5211JH230001)。

摘　　要：开展光伏场站集电线路快速故障选线对保证系统平稳运行十分重要。提出了基于零序电流梯度Teager能量算子(teager energy operator,TEO)的光伏场站集电线路故障选线方法。针对单相接地故障建立集电线路零序电流序网模型,并分析零序电流、电压分布规律以及故障期间光伏电源的馈出特性。采用TEO计算零序电流梯度能量值,基于故障线和非故障线测点处能量值差异整定阈值,提出故障选线判据,并搭建光伏场站集电线路模型。仿真验证表明:所提方法在不同故障位置、接地电阻、机组出力、噪声干扰场景下都有良好的选线效果。Carrying out rapid fault selection of PV power station collection lines is of great significance to ensure the stable operation of the system.A fault method for PV power station collection lines based on the zero-sequence current gradient Teager energy operator(TEO)is proposed.The zero-sequence current sequence model of the collection line for single-phase ground fault is established,and the distribution law of the zero-sequence current and voltage as well as the output characteristics of PV power supply during the fault period are analyzed.The TEO is used to calculate the energy value of the zero-sequence current gradient,and the threshold is based on the difference in energy values between the fault line and the non-fault line measurement points.A fault selection criterion is proposed,and a PV power station line model is built.Simulation verification shows that the proposed method has good selection effect under different fault positions,grounding resistances,unit outputs,and noise interference scenarios.

关 键 词：集电线路 快速傅里叶变换 梯度能量 故障选线 

分 类 号：TM862[电气工程—高电压与绝缘技术] TM615