基于改进变分模态分解去噪的高频电应力下聚酰亚胺局部放电温-频特性研究

doi:10.19595/j.cnki.1000-6753.tces.221258

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Abstract Partial discharge (PD) is a significant reason for the deterioration of polyimide (PI) insulation in high-frequency power transformers (HFPT). In order to study the partial discharge mechanism of polyimide under high-frequency voltage and explore the influence of temperature and frequency on the partial discharge characteristics, a high frequency partial discharge test platform was established. Spherical plate electrode was selected to simulate the actual electric field distribution of polyimide in HFPT, and ETS-93686 high-frequency pulse current sensor was used to collect PD signal. Teck MDO3024 oscilloscope was used to simultaneously collect high-frequency sinusoidal signal and partial discharge signal.
Four temperatures (25℃, 50℃, 75℃, 100℃) and five frequencies (10kHz, 20kHz, 30kHz, 40kHz, 50kHz) were selected for the experiment. The partial discharge inception voltage (PDIV) was recorded at a boosting speed of 200V/s. The test selected 1.5~2 times of PDIV as the partial discharge test voltage, which means keeping each experiment at a constant voltage of 2.5kV.
There are a lot of noise signals in the data measured by the pulse current sensor. Because it is difficult to adaptively select decomposition parameters of variational mode decomposition (VMD), equilibrium optimizer (EO) algorithm was used to obtain the optimal number of modal decomposition K and the penalty factor α. First, initialized the parameters of the EO algorithm and generated n initial particles randomly. Limited K to an integer ranging from 1 to 10, and constrained the penalty factor α ranging from 100 to 7 000. Second, decomposed the initial particles by VMD, and obtained the minimum envelope entropy as the fitness value. Evaluated the fitness value, then selected the best four terms and the arithmetic mean value of these four terms as candidate solutions to build a balance pool. Updated the concentration to determine whether the maximum number of iterations has been reached. Finally, the optimal parameter K and α of VMD decomposition was obtained. The result of experimental data denoising shows that the EO-VMD algorithm proposed in this paper can remove the experimental noise very well.
The experimental results show that temperature and frequency have positive correlation with the characteristic quantity of partial discharge, such as the maximum discharge amplitude, the total discharge amplitude and the discharge times. At the same time, with the increase of temperature or frequency, the phenomenon of "clustering" and "delamination" of discharge decreases gradually. The influence of frequency on the characteristic quantity of PD is greater at high temperature, while the influence of temperature is greater at high frequency. These two variables have a coupling promoting relationship. In this paper, the mechanism of temperature-frequency synergy is analyzed. At high frequency and high temperature, the tangential electric field at the gas-solid interface increases, and the discharge develops to the weak electric field region. Therefore, the phenomenon of "clustering" and "delamination" of the discharge gradually weakens. High frequency will lead to the increasing times of space charge injection and extraction per unit time, which means the increase of displacement current and local temperature. High temperature will make it easier for carriers to overcome the work function and cause more hot electron emission. Therefore, under high-frequency sinusoidal voltage, temperature and frequency have a coupling promoting relationship to partial discharge.

Key words： Partial discharge equilibrium optimizer variational mode decomposition temperature frequency polyimide

Received: 29 June 2022

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TM855

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	Xu Huangkuan
	Zhang Li
	Bilal Iqbal Ayubi
	Zou Liang
	Wang Guan

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Xu Huangkuan,Zhang Li,Bilal Iqbal Ayubi等. Study on Temperature-Frequency Partial Discharge Characteristics of Polyimide under High Frequency Electrical Stress Based on Improved Variational Modal Decomposition Denoising[J]. Transactions of China Electrotechnical Society, 2023, 38(3): 565-576.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.221258 OR https://dgjsxb.ces-transaction.com/EN/Y2023/V38/I3/565

[1] 涂春鸣, 黄红, 兰征, 等. 微电网中电力电子变压器与储能的协调控制策略[J]. 电工技术学报, 2019, 34(12): 2627-2636.
Tu Chunming, Huang Hong, Lan Zheng, et al.Coordinated control strategy of power electronic transformer and energy storage in microgrid[J]. Transactions of China Electrotechnical Society, 2019, 34(12): 2627-2636.
[2] 高范强, 李子欣, 李耀华, 等. 面向交直流混合配电应用的10kV-3MV·A四端口电力电子变压器[J]. 电工技术学报, 2021, 36(16): 3331-3341.
Gao Fanqiang, Li Zixin, Li Yaohua, et al.10kV-3MV·A four-port power electronic transformer for AC-DC hybrid power distribution applications[J]. Transactions of China Electrotechnical Society, 2021, 36(16): 3331-3341.
[3] Qin Hengsi, Kimball J W.Solid-state transformer architecture using AC-AC dual-active-bridge converter[J]. IEEE Transactions on Industrial Electronics, 2013, 60(9): 3720-3730.
[4] Le Besnerais J, Fasquelle A, Hecquet M, et al.Multiphysics modeling: electro-vibro-acoustics and heat transfer of PWM-fed induction machines[J]. IEEE Transactions on Industrial Electronics, 2010, 57(4): 1279-1287.
[5] 马星河, 张登奎. 基于改进经验小波变换的高压电缆局部放电噪声抑制研究[J]. 电工技术学报, 2021, 36(增刊1): 353-361.
Ma Xinghe, Zhang Dengkui.Research on suppression of partial discharge noise of high voltage cable based on improved empirical wavelet transform[J]. Transactions of China Electrotechnical Society, 2021, 36(S1): 353-361.
[6] 李文华, 姜惠, 赵正元, 等. 基于波形匹配端点延拓法优化的经验模态分解算法在铁路继电器参数降噪上的应用[J]. 电工技术学报, 2022, 37(10): 2656-2664.
Li Wenhua, Jiang Hui, Zhao Zhengyuan, et al.Application of empirical mode decomposition algorithm based on waveform matching endpoint continuation method in noise reduction of railway relay parameters[J]. Transactions of China Electrotechnical Society, 2022, 37(10): 2656-2664.
[7] 李睿彧, 刘飞, 梁霖, 等. 基于参数优化变分模态分解的交流变频电机转子断条故障识别方法[J]. 电工技术学报, 2021, 36(18): 3922-3933.
Li Ruiyu, Liu Fei, Liang Lin, et al.Fault identification of broken rotor bars for the variable frequency AC motor based on parameter optimized variational mode decomposition[J]. Transactions of China Electrotechnical Society, 2021, 36(18): 3922-3933.
[8] 刘冲, 马立修, 潘金凤, 等. 联合VMD与改进小波阈值的局放信号去噪[J]. 现代电子技术, 2021, 44(21): 45-50.
Liu Chong, Ma Lixiu, Pan Jinfeng, et al.PD signal denoising based on VMD and improved wavelet threshold[J]. Modern Electronics Technique, 2021, 44(21): 45-50.
[9] 刘思华, 王健, 刘涛, 等. 高频电压下油纸绝缘系统的局部放电及产气特性研究[J]. 高压电器, 2018, 54(2): 121-127.
Liu Sihua, Wang Jian, Liu Tao, et al.Research on partial discharge and gas production characteristics of oil-paper insulation system under high frequency voltage[J]. High Voltage Apparatus, 2018, 54(2): 121-127.
[10] Cavallini A, Montanari G C.Effect of supply voltage frequency on testing of insulation system[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2006, 13(1): 111-121.
[11] 徐跃, 邓小军. 不同频率和温度的电晕放电对聚酰亚胺薄膜的损伤特性研究[J]. 绝缘材料, 2014, 47(1): 85-88.
Xu Yue, Deng Xiaojun.Study on the effect of corona discharge on the damage mechanism of polyimide film under different frequency and temperature[J]. Insulating Materials, 2014, 47(1): 85-88.
[12] 韩帅, 李庆民, 刘伟杰, 等. 温-频耦合效应对高频固态变压器绝缘局部放电特性的影响[J]. 电工技术学报, 2015, 30(2): 204-210.
Han Shuai, Li Qingmin, Liu Weijie, et al.Impacts of coupled temperature-frequency effects on partial discharge characteristics of high frequency solid state transformer insulation[J]. Transactions of China Electrotechnical Society, 2015, 30(2): 204-210.
[13] 罗杨, 吴广宁, 王鹏, 等. 连续方波脉冲电压下温度对聚酰亚胺薄膜局部放电特性的影响[J]. 中国电机工程学报, 2012, 32(19): 154-160, 199.
Luo Yang, Wu Guangning, Wang Peng, et al.Effect of temperature on partial discharge properties of polyimide film under continuous square impulse voltage[J]. Proceedings of the CSEE, 2012, 32(19): 154-160, 199.
[14] 刁常晋, 程养春, 邓春, 等. 阶梯升压试验和恒定电压试验中油纸绝缘局部放电发展规律的对比[J]. 高电压技术, 2013, 39(2): 365-373.
Diao Changjin, Cheng Yangchun, Deng Chun, et al.Contrast of the developing regularity of partial discharge of oil-paper insulation using step-stress test and constant-stress test[J]. High Voltage Engineering, 2013, 39(2): 365-373.
[15] 罗杨. 局部放电对聚酰亚胺薄膜的损伤特性及材料改性研究[D]. 成都: 西南交通大学, 2014.
[16] 肖洒, 陈波, 沈道贤, 等. 改进VMD和阈值算法在局部放电去噪中的应用[J]. 电子测量与仪器学报, 2021, 35(11): 206-214.
Xiao Sa, Chen Bo, Shen Daoxian, et al.Application of improved VMD and threshold algorithm in partial discharge denoising[J]. Journal of Electronic Measurement and Instrumentation, 2021, 35(11): 206-214.
[17] 杨蕾, 李胜男, 黄伟, 等. 基于平衡优化器的含高比例风光新能源电网无功优化[J]. 电力系统及其自动化学报, 2021, 33(4): 32-39.
Yang Lei, Li Shengnan, Huang Wei, et al.Reactive power optimization of power grid with high-penetration wind and solar renewable energies based on equilibrium optimizer[J]. Proceedings of the CSU-EPSA, 2021, 33(4): 32-39.
[18] 魏才懿, 杨军, 马建桥. 参数优化VMD对变压器声音信号的故障诊断[J]. 兰州交通大学学报, 2021, 40(4): 49-58.
Wei Caiyi, Yang Jun, Ma Jianqiao.Fault diagnosis of transformer sound signal by parameter optimization VMD[J]. Journal of Lanzhou Jiaotong University, 2021, 40(4): 49-58.
[19] 潘俊, 方志. 多脉冲均匀介质阻挡放电特性的仿真及实验研究[J]. 高电压技术, 2012, 38(5): 1132-1140.
Pan Jun, Fang Zhi.Simulation and experimental studies on discharge characteristics of multiple pulse homogeneous dielectric barrier discharge[J]. High Voltage Engineering, 2012, 38(5): 1132-1140.
[20] 张开放, 张黎, 赵彤, 等. 高频正弦电应力对气-固绝缘局部放电的影响[J]. 高电压技术, 2019, 45(12): 3879-3888.
Zhang Kaifang, Zhang Li, Zhao Tong, et al.Influence of high frequency sinusoidal electrical stress on partial discharge of gas-solid insulation[J]. High Voltage Engineering, 2019, 45(12): 3879-3888.
[21] 邢轩, 赵庆昕, 王志清, 等. 电压频率和环境湿度对聚酰亚胺薄膜局部放电特性的影响[J]. 绝缘材料, 2020, 53(1): 35-40.
Xing Xuan, Zhao Qingxin, Wang Zhiqing, et al.Effect of voltage frequency and ambient humidity on partial discharge characteristics of polyimide films[J]. Insulating Materials, 2020, 53(1): 35-40.
[22] 钟力生, 李盛涛, 徐传骧. 工程电介质物理与介电现象[M]. 西安: 西安交通大学出版社, 2013.
[23] Fabiani D, Montanari G C, Cavallini A, et al.Relation between space charge accumulation and partial discharge activity in enameled wires under PWM-like voltage waveforms[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2004, 11(3): 393-405.