基于导纳平面的发电机失磁保护整定计算  

Setting Calculation of Generator Field-Loss Protection Based on Admittance Plane

作　　者：朱太波 赵曙伟[1] 曹启明 ZHU Tai-bo;ZHAO Shu-wei;CAO Qi-ming(Suzhou Nuclear Power Research Institute,Suzhou 215004,China)

机构地区：[1]苏州热工研究院有限公司,江苏苏州215004

出　　处：《电工电气》2023年第3期34-37,共4页Electrotechnics Electric

摘　　要：基于导纳平面的发电机失磁保护采用定子电流和电压的正序分量计算出阻抗的倒数(导纳),总是产生物理上近似的稳定极限,导纳特性曲线与发电机运行极限特性曲线具有很高的相似性,因此在导纳平面上失磁保护能够直观地与低励限制特性配合。分析了基于导纳平面的失磁保护的整定原则,结合工程实例给出了基于导纳平面的失磁保护的整定算例,并通过发电机进相试验相关数据验证了整定计算的合理性。The reciprocal of impedance(admittance)calculated by positive-sequence component of stator current and voltage always produces a physically approximate stability limit based on field-loss protection of the admittance plane.The admittance characteristic curve has high similarity with the generator operating limit characteristic curve,so the field-loss protection of the admittance plane can match low excitation limit characteristic in a straight way.The paper analyzes the setting principle of field-loss protection based on the admittance plane,gives its setting calculation with engineering examples,and verifies the rationality of setting calculation by the relevant data obtained from the leading phase test of a generator.

关 键 词：发电机 导纳 失磁保护 低励限制 整定计算 

分 类 号：TM31[电气工程—电机] TM762