基于梯度油温的变压器局部放电定位技术

IF 2.6 4区 工程技术 Q3 ENERGY & FUELS Frontiers in Energy Research Pub Date : 2024-07-31 DOI:10.3389/fenrg.2024.1428012
Ruidong Yu, Zhousheng Zhang
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摘要

引言 传统的局部放电定位改进策略主要从智能算法入手,但没有考虑铁芯绕组和油温对局部放电定位的影响。通过有限元仿真,建立了变压器模型,分析了局部放电产生的超声波信号在梯度油温和绕组干扰下的传播特性。提出了混沌萤火虫-粒子群混合算法,并通过计算舒伯特多峰函数。结果变压器局部放电产生的超声波速度无法固定,建议在变压器顶部中心附近安装超声波传感器。在多个局部极值点的情况下,所提出的算法可以得到更好的优化。在梯度油温实验下,该算法在有绕组阻挡和无绕组阻挡的情况下,定位误差分别小于 100 mm 和 55 mm,平均定位误差分别为 74.2 mm 和 35.2 mm。
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Transformer partial discharge location technology based on gradient oil temperature
IntroductionThe traditional partial discharge localization improvement strategy mainly starts from the intelligent algorithm, but fails to consider the influence of core winding and oil temperature on partial discharge positioning.MethodsThis paper also considers the influence of the iron core winding and oil temperature. Through finite element simulation, a transformer model was established to analyze the propagation characteristics of ultrasonic signals generated by partial discharge under the interference of gradient oil temperature and winding. The chaotic firefly-particle swarm hybrid algorithm is proposed, and through the calculation of Shubert’s multi-peak function. Finally, a partial discharge defect platform based on gradient oil temperature was built to verify the chaotic firefly-particle swarm hybrid localization algorithm.ResultsThe ultrasonic velocity generated by partial discharge in transformers cannot be fixed, and it is suggested that ultrasonic sensors should be installed near the center of the top of the transformer. The proposed algorithm can be better optimized in the case of multiple local extreme points. Under gradient oil temperature experiments, the algorithm achieves positioning errors less than 100 and 55 mm for cases with and without winding obstruction, respectively, with average positioning errors of 74.2 and 35.2 mm.DiscussionThe positioning method in this paper can provide a technical reference for the partial discharge positioning of transformers in actual operation.
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来源期刊
Frontiers in Energy Research
Frontiers in Energy Research Economics, Econometrics and Finance-Economics and Econometrics
CiteScore
3.90
自引率
11.80%
发文量
1727
审稿时长
12 weeks
期刊介绍: Frontiers in Energy Research makes use of the unique Frontiers platform for open-access publishing and research networking for scientists, which provides an equal opportunity to seek, share and create knowledge. The mission of Frontiers is to place publishing back in the hands of working scientists and to promote an interactive, fair, and efficient review process. Articles are peer-reviewed according to the Frontiers review guidelines, which evaluate manuscripts on objective editorial criteria
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