基于二维多信号分类算法的外绝缘局部放电位置优化方案

IF 1.4 4区 工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC
Shaotong Pei, Dewang Liu, Zijian Ye, Jiajun Yang, Yunpeng Liu
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引用次数: 0

摘要

局部放电(PD)定位对于确保电力设备的安全运行至关重要。本文提出了一种外绝缘设备局部放电定位的优化方案。该优化方案基于八元交叉传感器阵列来接收PD产生的超声信号,并使用高精度的二维多信号分类(2-DMUSIC)算法来定位信号。采用模拟放电信号对优化方案进行了测试,结果表明,当信噪比在−5dB以上时,定位误差小于0.61°。此外,在不同的位置测试了三个放电模型。针板、锥板和球板放电模型的平均方位误差分别为0.9°、1.9°和1.55°,平均俯仰角误差分别为0.75°、2.1°和1.4°。由此可见,针板模型具有最佳的定位效果。在双放电源场景下进行了仿真和实验,误差在2.2°以内。基于所提出的优化方案,开发了PD位置可视化设备并在现场应用。该设备能够满足操作和维护的要求。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Optimization scheme of partial discharge location of external insulation based on 2-D multiple signal classification algorithm

Optimization scheme of partial discharge location of external insulation based on 2-D multiple signal classification algorithm

Partial discharge (PD) localization is critical to ensure the safe operation of power equipment. In this paper, an optimization scheme is developed for PD positioning of external insulation equipment. The optimization scheme is based on an eight-element cross sensor array to receive the ultrasonic signal generated by the PD, and uses the highly accurate 2-D multiple signal classification (2-D MUSIC) algorithm to locate the signal. Simulated discharge signal is adopted to test the optimization scheme, and the results show that the positioning error is less than 0.61° when the signal-to-noise ratio (SNR) is above −5 dB. In addition, three discharge models are tested at various locations. The average azimuth errors are 0.9°, 1.9°, and 1.55° for the needle-plate, cone-plate, and ball-plate discharge models, respectively, and the average pitch angle errors are 0.75°, 2.1°, and 1.4°, respectively. These show that the needle-plate model has the best positioning effect. Simulations and experiments are also carried out on the double discharge source scenario, and the error is within 2.2°. A PD location visualization equipment based on the proposed optimization scheme is developed and applied on-site. The equipment is capable of satisfying the requirements of operation and maintenance.

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来源期刊
Iet Science Measurement & Technology
Iet Science Measurement & Technology 工程技术-工程:电子与电气
CiteScore
4.30
自引率
7.10%
发文量
41
审稿时长
7.5 months
期刊介绍: IET Science, Measurement & Technology publishes papers in science, engineering and technology underpinning electronic and electrical engineering, nanotechnology and medical instrumentation.The emphasis of the journal is on theory, simulation methodologies and measurement techniques. The major themes of the journal are: - electromagnetism including electromagnetic theory, computational electromagnetics and EMC - properties and applications of dielectric, magnetic, magneto-optic, piezoelectric materials down to the nanometre scale - measurement and instrumentation including sensors, actuators, medical instrumentation, fundamentals of measurement including measurement standards, uncertainty, dissemination and calibration Applications are welcome for illustrative purposes but the novelty and originality should focus on the proposed new methods.
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