微小温度信号的高压绕组轻微匝间短路双特征识别方法
By using a non-contact infrared micro-temperature sensing array and synchronous acquisition of three-phase current signals, a quantitative correlation model between temperature and phase difference is constructed, which solves the problem of identifying minor inter-turn short circuits in high-voltage stator windings and achieves accurate detection and stable identification of early faults.
CN122109935BActive Publication Date: 2026-07-17HARBIN UNIV OF SCI & TECH
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HARBIN UNIV OF SCI & TECH
- Filing Date
- 2026-04-29
- Publication Date
- 2026-07-17
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Figure CN122109935B_ABST
Abstract
本发明涉及电力装备故障检测领域，具体公开了微小温度信号的高压绕组轻微匝间短路双特征识别方法，采用非接触红外传感阵列实现狭小空间微温度采集，同步获取三相电流信号；经干扰剔除、微温差计算与微信号放大提取标准化温度特征，对电流信号预处理后得到相位差标准化特征；基于温度影响机理构建温度‑相位差耦合特征向量，计算双特征异常关联度并按分级阈值完成故障识别，实时更新基准特征库。本发明解决了高压绕组空间狭小测温难、微信号易被干扰、温度与电气特征脱节的问题，保留双特征融合创新点，实现了隐性匝间短路故障的早期、精准识别，误判漏判率低，适配高压电机、发电机定子绕组在线监测，工程实用性强。
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