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随着智能电网向高比例新能源接入方向演进，架空输电线路的宽频带电流精确检测成为新型电力系统态势感知的关键技术需求。针对传统电磁式电流互感器受限于铁芯材料频响特性，难以实现千赫兹级高频电流准确传变的技术瓶颈，本研究聚焦非接触式测量方法的精度提升问题。现有的基于隧道磁电阻效应的电流传感器虽具备宽频带测量优势，但其用于架空线三相电流检测的解耦计算结果受架空线舞动引发的空间位移扰动影响显著。为解决上述问题，提出一种多物理量融合测量方法，首先利用隧道磁电阻电流传感器阵列对理想静止状态下的架空线三相电流进行解耦测量，并分析当导体发生位移时所产生的测量误差。继而提出一种利用微机电系统加速度传感器改进的架空线三相电流测量方法，将隧道磁电阻电流传感器与加速度传感器融合，在测量三相电流的同时，利用加速度传感器实时监测导线运动姿态，同步修正三相电流解耦方程，最终实现复杂环境下的架空线三相电流精确测量。
Abstract：With the evolution of smart grids towards high-proportion renewable energy integration,wide-frequency-band current accurate detection in overhead transmission lines has become a critical technological requirement for situational awareness in new power systems.Aiming at the technical bottleneck of traditional electromagnetic current transformers being limited by the frequency response characteristics of iron core materials,which makes it difficult to achieve accurate transformation of high-frequency currents at the kHz level,this study focuses on the accuracy improvement of non-contact measurement methods. Although existing current sensors based on the tunneling magnetoresistance(TMR) effect exhibit advantages in wideband measurement,their decoupling calculations for three-phase current detection in overhead lines are significantly affected by spatial displacement disturbances caused by overhead line galloping.A multi-physical quantity fusion measurement method is proposed to address these challenges. First,a TMR current sensor array is employed to perform decoupled measurements of three-phase current in overhead lines under ideal static conditions,followed by an analysis of measurement errors induced by conductor displacement.Subsequently,an improved three-phase current measurement method for overhead lines using micro electro mechanical systems(MEMS)acceleration sensors is proposed.By fusing TMR current sensors with MEMS acceleration sensors,this approach simultaneously measures three-phase current while utilizing MEMS acceleration sensors to monitor real-time conductor motion postures and synchronously correcting the three-phase current decoupling equations,ultimately achieving precise three-phase current measurement of overhead lines in complex environments.
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基本信息:
DOI：10.20097/j.cnki.issn1007-9904.2025.08.002
中图分类号:TP212;TM75;TM933.1
引用信息:
[1]周展帆,严宇,何泽宇,等.基于多源MEMS传感器的架空线电流精确测量方法[J].山东电力技术,2025,52(08):16-24.DOI:10.20097/j.cnki.issn1007-9904.2025.08.002.
基金信息:
国家自然科学基金联合基金重点项目(U22B20113); 变电智能运检实验室开放课题基金(SGHNJX00ZLJS2400192)~~
2024-12-19
2024
2025-05-27
2025
2
2025-08-25
2025-08-25