基于暂态能量函数法的同步发电机失磁后稳定性控制研究  

Stability Control of Synchronous Generator after Excitation Loss Based on the Transient Energy Function Method

作　　者：林莉[1] 郭文宇[1] 

机构地区：[1]重庆大学电气工程学院,重庆400044

出　　处：《华东电力》2013年第7期1446-1451,共6页East China Electric Power

基　　金：国家自然科学基金项目(50807055);重庆市自然科学基金项目(cstc2012jjA90006)~~

摘　　要：为了对同步发电机失磁故障后稳定性控制问题进行深入研究,推导了是否计及阻尼功率两种情况下转子系统暂态能量函数的构成。通过发电机转子暂态能量函数与发电机稳定性和发电机转子势能与发电机失磁深度的相依关系分析,提出了一种按发电机转子暂态能量函数值的大小对部分失磁的发电机实施减载控制的方法。通过算例分析,验证了此方法的正确性,并且仿真结果表明:其减载速度与实时测量的发电机转子势能成正比,可最大限度地保证深度失磁的发电机不失去同步,使非深度失磁的发电机能保留较大的发电功率。For the further exploration into the stability control of synchronous generator after excitation loss,this paper derives the rotor system transient energy function considering the damping power or not.Based on the analysis of the relationship between transient energy function of generator rotor system and generator stability,and between the rotor potential energy of generator and the loss-of-excitation depth of generator,the load-shedding control method is applied to partial loss-of-excitation generator according to the transient energy function value of generator rotor system.Calculation examples verify the correctness of the method and simulation results show that the generator load-shedding speed is proportional to the real-time measurement of generator rotor potential energy,so this method can ensure that deep loss-of-excitation generator will not lose synchronization,while the partial loss-of-excitation generator keeps larger generating power.

关 键 词：同步发电机 励磁故障 稳定性控制 暂态能量函数 减载控制 

分 类 号：TM341[电气工程—电机]