励磁调节器低励限制曲线与汽轮发电机失磁保护整定配合研究

Study on the coordination between low excitation limit curve of excitation regulator and loss-of-excitation protection setting of turbo-generator

励磁调节器低励限制与发电机失磁保护的配合关系是否正确尤为重要,同时也是网源协调的一项重要内容。在概要介绍低励限制和失磁保护的基础上,提出了一种基于静稳阻抗圆双外切正六边形的汽轮发电机低励限制曲线整定方法。结合案例分析,通过与调控中心给定的低励限制定值和行业标准规定对比,证明了该整定方法的正确性和有效性,同时整定简单方便,易于实现。

Whether the coordination between low excitation limit of excitation regulator and loss-of-excitation protection of generator is correct is particularly important,and it is also an important content of grid source coordination.Based on the brief introduction of low excitation limit and loss-of-excitation protection,a setting method of low excitation limit curve of turbo-generator based on static stable impedance circle double external tangent hexagon is proposed.Combined with the case analysis,the correctness and effectiveness of the setting method are proved by comparing with the setting value of low excitation limit given by the control center and the industry standard.At the same time,the setting is simple,convenient and easy to realize.