浅析发变组转子过负荷保护与励磁强励反时限配合

摘要

随着整个电网大型机组的逐渐增多,大型发电机组成为电网的主要机型.发电机保护与励磁系统参数设置不当会引起机组解列,造成系统功率波动,严重的可能引起系统震荡失步、系统瓦解等重大事故,有必要对发变组转子过负荷保护和励磁系统限制曲线之间的定值配合关系进行验证,提高整个电力系统的安全可靠性.%Along with the gradually increasing of the large unit in the power grid, the large generator has become the main model of the power grid. The improper setting of generator protection and generator excitation system parameters will cause the unit's disconnection and result in system power fluctuations, the serious may cause some tremendous accidents such as the system out-of-step oscillation and system break-down, so it is necessary to validate the fixed value cooperation relationship between generator-transformer unit rotor's overload protection and excitation system's limit curve to improve the safety and reliability of the whole power system.