Suzhou Electric Appliance Research Institute
期刊号: CN32-1800/TM| ISSN1007-3175

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套管介损在线监测测量误差及其影响因素试验研究

来源:电工电气发布时间:2020-08-22 10:22浏览次数:660
套管介损在线监测测量误差及其影响因素试验研究
 
周丹1,马志钦1,杨贤1,温爱辉2,靳宇晖1,姜烁1
(1 广东省电力装备可靠性企业重点实验室(广东电网有限责任公司电力科学研究院),广东 广州 510080;2 广东电网有限责任公司,广东 广州 510060)
 
    摘 要:结合工程实际,分析了介质损耗角正切值tanδ在线监测的误差影响因素。建立了考虑多元件参量包括套管、电流传感器、信号通道以及信号调理单元的复杂等值电路模型,通过试验得到了电路模型中主要的等效电气参数。搭建了高、低压试验平台以模拟套管介损测量,模拟在复杂电磁及大气环境下传感器接线方式、空间电磁场对测量回路以及tanδ测量结果的影响,结合电路仿真分析了温、湿度对电流传感器测量角差的影响规律,通过老化试验,研究了元器件老化对信号调理单元等值电气参数和输出相差的影响。理论分析和实验结果验证了多因素对测量二次系统的影响是导致测量结果波动的主要原因。
    关键词:套管;介质损耗角正切值;在线监测;电路模型;误差分析
    中图分类号:TM216+.5;TM835.4     文献标识码:A     文章编号:1007-3175(2020)08-0022-06
 
Experimental Research on Measurement Errors and Its Influencing Factors for On-Line
Tan Delta Monitoring of High-Voltage Bushings
 
ZHOU Dan1, MA Zhi-qin1, YANG Xian1, WEN Ai-hui2, JIN Yu-hui1, JIANG Shuo1
(1 Guangdong Key Laboratory of Electric Power Equipment Reliability (Electric Power Research Institute of Guangdong Power Grid Co., Ltd), Guangzhou 510080, China;  2 Guangdong Power Grid Co., Ltd, Guangzhou 510060, China)
 
    Abstract: In this paper, combined with engineering practice, the factors affecting the error of online monitoring of the dielectric loss tangent value tanδ are analyzed. A complex equivalent circuit model considering multi-component parameters including bushings, current sensors, signal channels and signal conditioning units is established, and the main equivalent electrical parameters in the circuit model are obtained through experiments.A high and low voltage test platform was built to simulate the casing dielectric loss measurement, simulate the sensor wiring method under complex electromagnetic and atmospheric environments, the influence of the space electromagnetic field on the measurement loop and the tanδ measurement results, and combined with circuit simulation, the influence of temperature and humidity on the angle difference measured by the current sensor is analyzed. Through the aging test, the influence of component aging on the equivalent electrical parameters and output phase difference of the signal conditioning unit is studied. Theoretical analysis and experimental results verify that the influence of multiple factors on the measurement secondary system is the main reason for the fluctuation of the measurement results.
    Key words: bushings; dielectric loss tangent tan δ; on-line monitoring; circuit model; error analysis
 
参考文献
[1] 王世阁. 变压器套管故障状况及其分析[J]. 变压器,2002,39(7):35-40.
[2] 任晓红,王伟,郑健康,等.500 kV变压器套管典型故障及分析[J]. 高电压技术,2008,34(11):2513-2516.
[3] 杜永永. 基于频域介电响应的油纸电容式套管受潮和老化状态评估[D]. 重庆:重庆大学,2017.
[4] 王昌长,李福祺,高胜友. 电力设备的在线监测与故障诊断[M]. 北京:清华大学出版社,2006.
[5] 袁飞. 容性设备介损测量算法的对比与改进[J].电工电气,2015(4):10-14.
[6] 付炜平. 电容型设备绝缘的现场带电检测[J]. 高电压技术,2006,32(1):111-113.
[7] 李亚伟,刘念,潘志强,等. 容性设备的故障诊断技术[J]. 四川电力技术,2006,29(5):57-60.
[8] SUN C X, LI Jian,ZHENG H P, et al.A New Method of Faulty Insulation Diagnosis in Power Transformer Based on Degree of Area Incidence Analysis[J].Power System Technology,2002,26(7):24-29.
[9] 陈卓,刘念,薄丽雅. 电力设备状态监测与故障诊断[J]. 高电压技术,2005,31(4):46-48.
[10] 王红斌,陈忠东,林春耀. 绕组结构对介质损耗测量的影响分析[J]. 广东电力,2006,19(7):8-10.
[11] 王卓,黄新波,邓凸,等. 变压器套管介质损耗在线监测装置[J]. 广东电力,2013,26(4):72-76.
[12] 夏健,丁卫东,孙旭东,等. 基于数据分析的变压器套管新型在线监测预警策略研究[J]. 高压电器,2018,54(9):171-176.
[13] 李斐明,张慧军,臧春艳,等. 高压套管运行状态的一种主客观融合评价方法[J]. 高压电器,2018,54(8):218-224.
[14] 张伏生,耿中行,葛耀中. 电力系统谐波分析的高精度FFT算法[J]. 中国电机工程学报,1999,19(3):63-66.
[15] 律方成,晁红军,徐志钮,等. 介质损耗数字化测量方法综述[J]. 华北电力大学学报(自然科学版),2008,35(6):21-26.
[16] 徐志钮,律方成,赵丽娟. 基于加汉宁窗插值的谐波分析法用于介损角测量的分析[J]. 电力系统自动化,2006,30(2):81-85.
[17] 徐志钮,律方成,李和明. 加Blackman-Harris 窗插值算法仿真介损角测量[J]. 高电压技术,2007,33(3):104-108.
[18] JAIN V K, COLLINS W L, DAVIS D C.High-accuracy analog measurements via interpolated FFT[J]. IEEE Transactions on Instrumentation and Measurement,1979,28(2):113-122.
[19] HARRIS F J. On the use of windows for harmonic analysis with the discrete Fourier transform[J].Proceedings of the IEEE,1978,66(1):51-83.
[20] GRANDKE T.Interpolation algorithms for discrete Fourier transforms of weighted signals[J]. IEEE Transactions on Instrumentation and Measurement,1983,32(2):350-355.