大型单元接线火电机组无起/备电源起停技术研究与应用  

Research and application of start stop technology of no start/standby power supply for large unit connected thermal power unit

作　　者：郭建仙 姜志成 郭航 Guo Jianxian;Jiang Zhicheng;Guo Hang(Shenhua Funeng Power Generation Co.,Ltd,Shishi,Fujian 362700)

机构地区：[1]神华福能发电有限责任公司,福建石狮362700

出　　处：《电气技术》2020年第7期103-107,共5页Electrical Engineering

摘　　要：某火电厂两台1050MW机组均采用发电机-变压器组单元接线,发电机出口未设置断路器,与主变之间的连接采用全连式分相封闭母线,发电机经主变升压后接入500kV配电装置,正常机组必须依靠起备变提供起/备电源起停。本项目主要研究发电机-变压器组采用单元接线,发电机出口未设置断路器的火电机组在起备变检修或故障、机组无起/备电源情况下,利用相邻机组主变倒送电或相邻机组高厂变提供备用电源起动,并且在机组起动后利用互备的方式,确保机组紧急情况下安全停机。Two 1050MW units in a thermal power plant are connected by generator transformer unit.There is no circuit breaker at the outlet of the generator.The connection between the generator and the main transformer is full chain split phase enclosed bus.The generator is connected to 500kV power distribution device after being boosted by the main transformer.The normal unit must rely on the start-up/standby power supply provided by the start-up/standby transformer to start and stop.This project mainly studies that the generator transformer unit adopts unit connection,the thermal power unit with no circuit breaker at the generator outlet will use the main transformer reverse power transmission of adjacent units or the high-voltage station transformer of adjacent units to provide the standby power for starting when the start-up/standby power supply is not available,and the mutual standby mode will be used after the start-up of the unit to ensure the safe shutdown of the unit in case of emergency.

关 键 词：倒送电 发电机-变压器组 起/备电源 起停 

分 类 号：TM621[电气工程—电力系统及自动化]