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

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羅氏線圈電流互感器傳遞特性及對保護繼電器的影響

來源:電工電氣發(fā)布時間:2019-11-19 13:19 瀏覽次數(shù):699
羅氏線圈電流互感器傳遞特性及對保護繼電器的影響
 
克帕依吐·吐爾遜
(國網(wǎng)新疆電力有限公司電力科學(xué)研究院,新疆 烏魯木齊 830011)
 
    摘 要:羅氏線圈電流互感器具有線性系統(tǒng)的特性,闡述了羅氏線圈電流互感器的傳遞特性及其對保護繼電器的影響,基于互感器的物理結(jié)構(gòu)分析了羅氏線圈傳感器和羅氏線圈電流互感器的頻率特性和瞬態(tài)特性。分析結(jié)果表明,互感器的帶寬可以提高保護中繼的性能,帶寬主要由羅氏線圈傳感器和信號處理電路的參數(shù)決定。且瞬態(tài)電流的測量誤差大小主要取決于電流互感器本身衰減直流分量精度的能力高低。針對空芯線圈電流互感器的性能提出了改進措施,以滿足保護繼電系統(tǒng)在結(jié)構(gòu)設(shè)計和測試標準方面的要求。
    關(guān)鍵詞:電流互感器;羅氏線圈;轉(zhuǎn)移特性;保護繼電器
    中圖分類號:TM452     文獻標識碼:A     文章編號: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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