1036MW机组注入式定子接地保护调试及动作分析  

Commissioning and operational analysis of voltage-injection stator grounding protection for 1 036 MW unit

作　　者：兀鹏越[1] 陈飞文[2] 黄旭鹏[2] 秦苓[2] 吴斌[2] 张杰[3] 

机构地区：[1]西安热工研究院有限公司,陕西西安710032 [2]华能海门电厂,广东汕头050310 [3]南京南瑞继保电气有限公司,江苏南京211100

出　　处：《电力自动化设备》2011年第3期147-150,共4页Electric Power Automation Equipment

摘　　要：大型汽轮发电机较多地采用2套完全相同的"零序电压+3次谐波"式定子接地保护,某百万千瓦级机组采用了国产注入式定子接地保护,实现了不同原理的保护双重化配置。阐述了注入式定子单相接地保护的原理,详细介绍了机组的保护静态调试、发电机静止状态下的现场调试、发电机30%额定电压下的现场调试内容并给出实验数据。针对机组启动调试期间发生的机端软连接开裂导致的定子接地事故,分析了该保护的实际动作情况,指出了注入式定子接地的优点。Large steam turbine generator unit normally adopts two identical ＂zero-sequence voltage plus 3rd harmonic＂ type stator grounding protection.The domestic voltage-injection stator grounding protection is recently applied to a unit to realize the redundant configuration of protections with different principles.The basic principle of voltage-injection stator single-phase grounding protection is introduced,and its factory commissioning,site commissioning with inoperative generator and that with 30 % rated voltage are detailed.The actual operating status for a stator grounding fault during unit startup commissioning is analyzed and its proper action shows the advantages of voltage-injection stator grounding protection.

关 键 词：百万千瓦 定子接地保护 调试 

分 类 号：TM77[电气工程—电力系统及自动化]