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
參考文獻
[1] 劉威峰, 馬飛越, 雍福全, 等. 分布電容法在變壓器繞組變形故障中輔助分析[J]. 電工電氣,2016(12):48-51.
[2] 李汝來,朱義勝. 無芯PCB變壓器的基本結(jié)構(gòu)及其特性[J]. 電子器件,2001,24(2):151-157.
[3] 徐雁,畢然. 空心線圈電流傳感器對暫態(tài)電流響應的仿真分析[J]. 電工技術(shù)學報,2004,19(11):61-65.
[4] 龔勇鎮(zhèn),黃崇林,廖輝,等. PCB型羅氏線圈電流傳感器的設(shè)計與試驗研究[J]. 制造業(yè)自動化,2017,39(2):100-103.
[5] 張弛,康小寧,鄭永康,等. 羅氏線圈電流互感器的暫態(tài)傳變特性[J].高電壓技術(shù),2018,44(12):4105-4112.
[6] 金世鑫,李華,金曉非,等. 基于Matlab的電子式互感器傳變特性仿真研究[J]. 東北電力技術(shù),2018,39(1):46-50.
[7] 吳猛.電流互感器特性分析及應用[J].智能電網(wǎng),2014,2(11):27-30.
[8] 李偉,尹項根,陳德樹,等. 基于Rogowski線圈的電子式電流互感器暫態(tài)特性研究[J]. 電力自動化設(shè)備,2008,28(10):34-37.
[9] 翟小社,王穎,林莘. 基于Rogowski線圈電流傳感器的研制[J]. 高壓電器,2002,38(3):19-22.
[10] 胡曉慶,朱澤軍,張贛雷,等. 淺析互感器在電力系統(tǒng)中的應用[J]. 中國新通信,2019,21(4):148.