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Analysis on Matching of Low Excitation Limitation of Excitation Regulator and Loss-of-excitation Protection of Generators
Author(s): 
Pages: 112-114
Year: Issue:  11
Journal: Guangdong Electric Power

Keyword:  失磁保护励磁限制整定配合防止误动;
Abstract: 为了验证失磁保护和低励限制参数的配合关系,即发电机的失磁保护必须在励磁调节器的低励限制之后动作,提出将二者归算到同一平面上进行对比的观点,通过探讨失磁阻抗圆和功率圆的关系,给出了发电机失磁阻抗圆转化为功率圆的具体方法.以广东某电厂机组参数为例,通过计算绘出了其发电机的低励限制曲线和失磁保护异步圆,从低励限制曲线位于失磁保护异步圆外直观地判断出二者的动作顺序满足配合要求.
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