考虑动作误差的低励限制与失磁保护定值配合方法研究

Research and verification for setting value coordination of low excitation limit and loss of excitation protection considering the device operation error

关于低励限制与失磁保护定值匹配的研究多聚焦于将其转换到同一功率平面或阻抗平面进行校核的方法,鲜有文献考虑实际装置动作特性对定值匹配结果的影响。该文从理论上详细分析各参数变化对失磁保护和低励限制的影响,提出基于装置动作误差的低励限制与失磁保护定值匹配校核原则,并论述定值失配时的定值调整方法,为当前各发电厂开展低励限制与失磁保护定值校核及整定提供了有效指导原则。

The research on the setting value coordination between the low excitation limit and loss of excitation protection is mostly concentrated on converting them to the same power plane or impedance plane for checking,but few works of literature consider the influence of actual device operating characteristics on the setting value matching results.This paper analyzes the influence of various parameter variations on the loss of excitation protection and low excitation limit in detail.Then,the setting value coordination test principle is proposed for low excitation limit and loss of excitation protection based on the device operation error.In addition,the adjustment method is presented when the setting value mismatch.It provides an effective guidance principle for power plants to set and check the setting value for low excitation limit and loss of excitation protection.