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

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罗氏线圈电流互感器传递特性及对保护继电器的影响

来源:电工电气发布时间:2019-11-19 13:19 浏览次数:14
罗氏线圈电流互感器传递特性及对保护继电器的影响
 
克帕依吐·吐尔逊
(国网新疆电力有限公司电力科学研究院,新疆 乌鲁木齐 830011)
 
    摘 要:罗氏线圈电流互感器具有线性系统的特性,阐述了罗氏线圈电流互感器的传递特性及其对保护继电器的影响,基于互感器的物理结构分析了罗氏线圈传感器和罗氏线圈电流互感器的频率特性和瞬态特性。分析结果表明,互感器的带宽可以提高保护中继的性能,带宽主要由罗氏线圈传感器和信号处理电路的参数决定。且瞬态电流的测量误差大小主要取决于电流互感器本身衰减直流分量精度的能力高低。针对空芯线圈电流互感器的性能提出了改进措施,以满足保护继电系统在结构设计和测试标准方面的要求。
    关键词:电流互感器;罗氏线圈;转移特性;保护继电器
    中图分类号:TM452     文献标识码:A     文章编号:1007-3175(2019)11-0021-04
 
Transmission Characteristics of Rogowski Coil Current Transformer and Its Influence on Protection Relay
 
KEPAIYITULLA ·Tursun
(Electric Power Research Institute of State Grid Xinjiang Power Company, Urumqi 830011 , China)
 
    Abstract: The Rogowski coil current transformer has the linear system characteristics. This paper expounded the transfer characteristic of Rogowski coil current transformer and its impacts on protection relays. Based on the physical structure of the transformer, this paper analyzed the frequency characteristics and transient characteristics of Rogowski coil sensor and Rogowski coil current transformer. The analysis result shows that the wide bandwidth of the transformer can improve the performance of the protection relay, and the bandwidth is mainly determined by the parameters of the Roche coil sensor and the signal processing circuit. It is also found that the measurement error of the transient current is mainly determined by the ability of the current transformer to replicate the DC component accuracy. Some measures have been put forward to improve the performance of air-core coil current transformers to meet the requirements of the protection relay system in structural design and test standards.
    Key words: current transformer; Roche coil; transfer characteristics; protection relay
 
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