基于模糊逻辑的水轮发电机灭磁电阻性能评价  

Demagnetization Resistance Performance Evaluation of Hydro-generator based on Fuzzy Logic

作　　者：石鑫 刘伟 周俊 文云浩 SHI Xin;LIU Wei;ZHOU Jun;WEN Yunhao(School of Electrical and Electronic Engineering,Chongqing University of Technology,Chongqing 400054,China)

机构地区：[1]重庆理工大学电气与电子工程学院,重庆400054

出　　处：《大电机技术》2022年第6期68-73,77,共7页Large Electric Machine and Hydraulic Turbine

摘　　要：本文针对小型水轮发电机在线灭磁性能评价,研究提出其性能参数及量化指标;将性能参数作为模糊逻辑的输入变量,根据专家经验建立灭磁电阻灭磁性能的模糊评价规则和模糊推理模型。对某小型水轮发电机空载内部故障时的灭磁过程进行了实例仿真,得出了线性电阻灭磁过程中励磁电压、电流和电磁容量暂态过程曲线,计算出线性电阻的灭磁时间与灭磁能容量,并进行了灭磁性能评价,该评价方法为灭磁电阻的选择与在线性能分析提供了参考依据。Aiming at the on-line demagnetization performance evaluation of small hydro-generators,the performance parameters and quantitative indicators are researched and put forward.The performance parameters are used as the input variables of fuzzy logic,and the fuzzy evaluation rules and fuzzy reasoning model of demagnetization performance for demagnetization resistance are established based on expert experience.The de-excitation process of a small hydro-generator in condition of no-load and fault is simulated.The transient curves of excitation voltage,current and electromagnetic capacity in the de-excitation process of linear resistance are obtained.The de-excitation time and energy capacity of linear resistance are calculated,and demagnetization performance is evaluated.This evaluation method provides a reference for the selection and on-line performance analysis of demagnetization resistance.

关 键 词：水轮发电机 灭磁电阻 实例仿真 模糊逻辑 

分 类 号：TM312[电气工程—电机]