特高压变压器差动保护改进  

Improvement of ultra high voltage transformer differential protection

作　　者：牛红星 耿英三[2] 段周朝[3] 蔡常群 温选尧 

机构地区：[1]许继集团,河南许昌461000 [2]西安交通大学,陕西西安710049 [3]平顶山姚孟发电有限责任公司,河南平顶山467031 [4]成都电力职工大学,四川成都610072

出　　处：《继电器》2005年第19期14-18,共5页Relay

摘　　要：针对特高压系统变压器的特点及对保护带来的问题,通过合理配置差动保护,以及对变压器运行方式的智能识别,细分保护动作特性区间,提出利用短数据窗高比例制动特性来保证在特征明显的区内故障时差动保护的快速动作。该方案已应用于WBH-800变压器保护装置并通过实验验证。To ultra high votage system transformer＇s characteristics and its requirement to protection, this paper configures differential protection reasonably, recognizes transformer＇s mode intelligently, and derides protection characteristics area delicately. Based on the above, a method using short data windows and high ratio restraint to ensure the differential proteeton speed while obviously fault in inter area happened is presented. This scheme has adopted in WBH-800 transformer device and passed the examination.

关 键 词：差动 励磁涌流 短数据窗 高比例 

分 类 号：TM77[电气工程—电力系统及自动化]