中国电机工程学报2025，Vol.45Issue(7)：2791-2799,中插29-中插30,11.DOI:10.13334/j.0258-8013.pcsee.240292
基于共模阻抗的双馈异步发电机转子绕组绝缘在线监测
Online Monitoring for Rotor Winding Insulation of Doubly-fed Induction Generator Using Common-Mode Impedance
摘要
Abstract
In contrast to conventional synchronous generators,doubly-fed induction generators(DFIGs)are subjected to dynamic stress variations in their rotor windings,leading to accelerated insulation aging.This critical issue demands enhanced attention to insulation condition monitoring.While existing protection methods are limited to fault detection and subsequent machine shutdown during short-circuit events,this study proposes an innovative online monitoring approach that enables proactive prognosis of rotor winding insulation degradation.The common-mode equivalent impedance is measured online using the switching transient harmonics produced by the rotor-side converter and the corresponding response in leakage current harmonics.The theoretical analysis and experimental results prove that the proposed method can detect the change in the rotor winding insulation parameters online,enabling non-intrusive online monitoring for rotor winding insulation degradation.关键词
双馈异步发电机/绝缘老化/转子绕组/在线监测/共模阻抗Key words
doubly-fed induction generator(DFIG)/insulation degradation/rotor winding/online monitoring/common-mode impedance分类
信息技术与安全科学引用本文复制引用
郑大勇,乐振春,常玉红,谢欢,桂林,陆格野,党智敏,张品佳..基于共模阻抗的双馈异步发电机转子绕组绝缘在线监测[J].中国电机工程学报,2025,45(7):2791-2799,中插29-中插30,11.基金项目
国家电网有限公司科技项目(SGJBDKOODZJS2310042).Science and Technology Project of State Grid Corporation(SGJBDKOODZJS2310042). （SGJBDKOODZJS2310042）
