大规模互联电网下发电机过励磁限制与励磁绕组过负荷保护的配合研究

Coordination of Over Excitation Limiter and Excition Winding Overload Protection for Large-scale Interconnected Power System

阐述发电机组过励磁限制与励磁绕组过负荷配合失当造成大电网事故的案例,分析励磁绕组过负荷保护和过励限制反时限特性配合关系。利用电网稳定计算结果找出失去配合的机组,给出一种优化的配合方式,对优化前后机组励磁电流和系统电压情况进行计算比较,证明了优化方案的有效性。

This paper expounds an accident owing to inappropriate coordination of the over excitation limiter and excition wind- ing overload protection.Analysis the coordination of the over excitation limiter and excition winding overload protection, Using power system calculation finds appropriate generator units.Presents a new method for their coordination. Comparing the eharic- ristie of the excitating current and Reactive voltage,it is concluded that the proposed scheme is efficacious.