一种高压电子式电流互感器在线校验系统

发布时间：2018-03-04 22:20

本文选题：电子式电流互感器　切入点：在线校验　出处：《电工技术学报》2014年07期 　论文类型：期刊论文

【摘要】：电子式互感器由于具有数字量输出、测量频带宽等优点而应用的愈加广泛,但由于是新兴技术,与传统互感器相比故障率高,因此需要缩短校验周期。传统校验方式需要线路停电,操作复杂且会造成停电损失。针对这些问题,本文提出一种高压电子式电流互感器的在线校验方法。在线校验时,高精度标准电流互感器和在线操作方式是研究的关键。设计了一种包含钳形铁心和钳形空心线圈的钳形双线圈作为标准互感器,校验时,通过分析比对两种线圈的输出特性,实现钳形双线圈准确度的自动校准,保证了校验系统的精度。在线操作时采用地电位作业法,利用绝缘操作杆将钳形双线圈接入高压母线,操作简单安全。国家高电压计量站检定及现场运行结果证明:该在线校验系统精度可达0.05级。
[Abstract]:Electronic transformers are more and more widely used because of their advantages of digital output and frequency bandwidth measurement. However, as a new technology, the failure rate of electronic transformers is higher than that of traditional transformers. Therefore, it is necessary to shorten the checkout period. The traditional calibration method needs line blackout, operation complexity and blackout loss. In view of these problems, this paper presents an on-line calibration method for high voltage electronic current transformer. High precision standard current transformer and on-line operation mode are the key points of the research. A kind of double clamp coil with clamp core and clamp hollow coil is designed as the standard transformer. When checking, the output characteristics of the two kinds of coils are analyzed and compared. The precision of the calibration system is ensured by the automatic calibration of the clamp double coils. The ground potential operation method is used in the on-line operation, and the clamp double coils are connected to the high voltage busbar by using the insulating operating rod. The operation is simple and safe. The verification and field operation results of the national high voltage metering station show that the accuracy of the on-line calibration system can reach 0.05 grade.
【作者单位】：华中科技大学强电磁工程与新技术国家重点实验室;贵州电力试验研究院;
【基金】：中国南方电网公司科技资助项目(K-GZ2011-050)
【分类号】：TM452

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