电子测量与仪器学报

张泽林,刘希喆.基于非接触式电压测量的电压监测系统[J].电子测量与仪器学报,2024,38(5):229-237

基于非接触式电压测量的电压监测系统

Voltage monitoring system based on non-vontact voltage measurement

DOI：

英文关键词:non-contact voltage measurement discrete wavelet threshold denoising hardware accelerated computing integrated learning

基金项目:

作者	单位
张泽林	华南理工大学电力学院广州510640
刘希喆	华南理工大学电力学院广州510640

Author	Institution
Zhang Zelin	School of Electric Power, South China University of Technology, Guangzhou 510640, China
Liu Xizhe	School of Electric Power, South China University of Technology, Guangzhou 510640, China

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中文摘要:

非接触式电压测量方法不直接与线路的金属导体部分接触，能适应多种应用场景的电压监测。设计一种利用改进的非接触式电压测量技术对线路电压进行测量并将测量得到的电压波形用于线路故障电压诊断的系统。对传统的非接触式电压测量技术进行拓扑分析并对测量电路拓扑进行改进，能够不受耦合电容影响并准确地测量线路上的电压。由于目前单一的故障特征提取方法具有局限性，为了利用由非接触式电压测量技术测量得到的电压波形实现准确地对线路故障电压进行识别诊断，提出了基于集成学习的故障电压状态识别系统，利用多种特征提取方法提取非接触式电压测量得到的电压波形特征，其识别结果用于对线路故障进行预警和处理。针对该电压监测系统，设计了测量精度和故障识别测试，得到稳态平均误差为0.9%，故障识别准确率最高可达到93%，表明该电压监测系统具有较高的精度和故障识别准确率。

英文摘要:

The non-contact voltage measurement method is not in direct contact with the metal conductor of the line and can adapt to the voltage monitoring in a variety of application scenarios. This paper designs a system which uses the improved non-contact voltage measurement technology to measure the line voltage and applies the measured voltage waveform to the line fault voltage diagnosis. Based on the topology analysis of the traditional non-contact voltage measurement technology and the improvement of the measurement circuit topology, the voltage on the line can be measured accurately without being affected by the coupling capacitance. Because of the limitation of the current single fault feature extraction method, in order to accurately identify and diagnose the line fault voltage by using the voltage waveform measured by the non-contact voltage measurement technology, in this paper, a fault voltage state identification system based on integrated learning is proposed, and a variety of feature extraction methods are used to extract the voltage waveform features obtained from non-contact voltage measurement. The identification results are used for early warning and processing of line faults. In this paper, aiming at the voltage monitoring system, the measurement accuracy and fault identification test are designed, and the steady-state average error is 0.9%, and the highest fault identification accuracy is 93%, which shows that the voltage monitoring system has high accuracy and fault identification accuracy.

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