主变压器长距离保护方案的研究  

Research on Long Distance Protection Scheme for Main Transformer

作　　者：刘立城 LIU Licheng

机构地区：[1]广州市电力工程设计院有限公司,广东广州510000

出　　处：《电力系统装备》2024年第5期39-42,共4页Electric Power System Equipment

摘　　要：文章在主变压器、各侧一次设备与二次设备的布置存在长距离的特殊场景下,对主变压器保护进行了探讨。从电流互感器的选择及计算入手,结合线路光纤电流差动保护的二次接线特点等方面,对主变压器长距离保护进行了全面分析。主变压器长距离保护方案的快速保护、后备保护以及保护范围,均可替代典型方案,而且对电流互感器的选择不会提出少见的参数需求。对市面上成熟的保护设备进行灵活组合,调整电流互感器二次绕组和保护装置的二次接线,可有效解决长距离特殊场景下的主变压器保护配置问题。This article explores the protection of the main transformer in special scenarios where there is a long distance between the layout of the main transformer,primary equipment on each side,and secondary equipment.Starting from the selection and calculation of current transformers,combined with the secondary wiring characteristics of fiber optic current differential protection for transmission lines,a comprehensive analysis was conducted on the long-distance protection of the main transformer.The fast protection,backup protection,and protection range of the long-distance protection scheme for the main transformer can replace typical schemes,and there will be no particularly rare parameter requirements for the selection of current transformers.Flexible combination of mature protection equipment on the market,adjusting the secondary winding of current transformers and the secondary wiring of protection devices,can effectively solve the configuration problem of main transformer protection in long-distance special scenarios.

关 键 词：主变压器 长距离 差动保护 线路光纤电流差动保护 电流互感器 

分 类 号：TM774[电气工程—电力系统及自动化]