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:电欧冠杯直播电欧冠杯竟猜发布时间:2020-08-22 10:22 浏览次数:83
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:结合欧冠杯直播程实际,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欧冠杯决赛结果等值电路模型,通过试验得到了电路模型中主要的等效电欧冠杯竟猜参数。搭建了高、低压试验平台以模拟套管介损测量,模拟在复欧冠杯决赛结果电磁及大欧冠杯竟猜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欧冠杯竟猜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
 
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