發(fā)布時(shí)間：2018-01-20 09:58

  本文關(guān)鍵詞： 電流互感器 羅氏線圈 TPY 最小二乘法 建模 龍格庫塔算法　出處：《電子科技大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：近幾十年來,隨著光學(xué)技術(shù)及電力電子科學(xué)技術(shù)的進(jìn)步,人類社會(huì)逐步進(jìn)入了數(shù)字化時(shí)代,這些技術(shù)的發(fā)展同時(shí)也推動(dòng)了電力工業(yè)的進(jìn)步,并進(jìn)一步促進(jìn)了電子式互感器技術(shù)的研究與發(fā)展。電子式互感器能直接提供數(shù)字信號給計(jì)量保護(hù)設(shè)備,可簡化二次設(shè)備,提高電網(wǎng)系統(tǒng)的準(zhǔn)確度和可靠性,故電子式互感器開始逐漸得以廣泛應(yīng)用。超、特高壓電力系統(tǒng)中,當(dāng)電子式互感器處于過渡工作狀態(tài)時(shí),短路電流非周期分量衰減時(shí)間較長,而要求切除短路故障的時(shí)間很短,故對電子式互感器暫態(tài)過程中數(shù)據(jù)進(jìn)行磁化曲線擬合、分析暫態(tài)過程參數(shù)以及對暫態(tài)過程進(jìn)行建模等工作對電網(wǎng)安全有重要意義�；陔娮邮交ジ衅鞔呕瘮M合與暫態(tài)特性建模對電網(wǎng)安全的必要性,本文對羅氏線圈原理電子式電流互感器進(jìn)行了建模及暫態(tài)特性研究,同時(shí)還對TPY電流互感器磁化擬合及建模進(jìn)行了研究,根據(jù)電流互感器數(shù)據(jù)得出相應(yīng)暫態(tài)模型,并基于模型作了仿真及實(shí)測數(shù)據(jù)分析。主要工作體現(xiàn)在以下方面:(1)針對不同工作環(huán)境下羅氏線圈電流互感器等效模型,分析不同模型參數(shù)的理論計(jì)算方法及適用范圍。(2)對羅氏線圈原理互感器建模,并根據(jù)羅氏線圈對應(yīng)參數(shù)模型,基于Matlab平臺仿真及實(shí)測數(shù)據(jù)驗(yàn)證其正確性。(3)對電流互感器暫態(tài)特性參數(shù)進(jìn)行理論分析,包括二次時(shí)間常數(shù)、勵(lì)磁電感和剩磁系數(shù)�；贛atlab平臺對TPY電流互感器數(shù)據(jù)進(jìn)行擬合,驗(yàn)證最小二乘法在電流互感器暫態(tài)建模數(shù)據(jù)處理中的可行性,進(jìn)而對暫態(tài)特性測量誤差進(jìn)行分析。(4)建立TPY數(shù)學(xué)模型,分析當(dāng)一次回路出現(xiàn)故障時(shí),TPY電流互感器的輸出變化。由于數(shù)學(xué)模型為非線性方程,故采用數(shù)值計(jì)算方法求解其顯示解,為提高計(jì)算的精度,本課題采用4階龍格-庫塔方法。最后對TPY電流互感器數(shù)據(jù)進(jìn)行實(shí)測分析,驗(yàn)證模型的正確性、可靠性與穩(wěn)定性。
[Abstract]:In recent decades, with the progress of optical technology and power electronics science and technology, human society has gradually entered the digital era, the development of these technologies has also promoted the progress of the power industry. Electronic transformers can directly provide digital signals to metering and protection equipment, simplify secondary equipment, and improve the accuracy and reliability of power system. Therefore, electronic transformers have gradually been widely used. In ultra-high voltage power systems, when electronic transformers are in transition, the attenuation time of short-circuit current is longer than that of non-periodic components. The time required to remove the short-circuit fault is very short, so the magnetization curve fitting of the data in the transient process of electronic transformer is carried out. Analysis of transient process parameters and modeling of transient process are of great significance to power network security. Based on magnetization fitting of electronic transformer and modeling of transient characteristics, it is necessary for power network security. In this paper, the modeling and transient characteristics of the electronic current transformer based on the principle of Roche coil are studied, and the magnetization fitting and modeling of the TPY current transformer are also studied. According to the data of current transformer, the corresponding transient model is obtained. Based on the model, the simulation and the analysis of the measured data are made. The main work is as follows: 1) the equivalent model of the Roche coil current transformer under different working environment. The theoretical calculation method and applicable range of different model parameters are analyzed to model the principle transformer of Roche coil, and according to the corresponding parameter model of Roche coil. Based on the simulation of Matlab platform and measured data to verify its correctness, the transient characteristic parameters of current transformer are analyzed theoretically, including the quadratic time constant. Based on the Matlab platform, the data of TPY current transformer are fitted to verify the feasibility of the least square method in the transient modeling data processing of current transformer. Then the measurement error of transient characteristics is analyzed. (4) the mathematical model of TPY is established, and the output variation of the current transformer is analyzed when the primary circuit fails. The mathematical model is a nonlinear equation. In order to improve the accuracy of the calculation, the fourth order Runge-Kutta method is adopted. Finally, the data of TPY current transformer are measured and analyzed to verify the correctness of the model. Reliability and stability.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM452

【參考文獻(xiàn)】

相關(guān)期刊論文 前8條

1 喬立山,王玉蘭,曾錦光;實(shí)驗(yàn)數(shù)據(jù)處理中曲線擬合方法探討[J];成都理工大學(xué)學(xué)報(bào)(自然科學(xué)版);2004年01期

2 張婷;方志;李春;趙龍章;;自積分式Rogowski線圈的電磁參數(shù)對其頻帶影響的研究[J];電測與儀表;2009年03期

3 趙乾麟;呂新明;;磁化曲線的連續(xù)可導(dǎo)擬合方法[J];機(jī)電產(chǎn)品開發(fā)與創(chuàng)新;2012年03期

4 梁建鋒;李軍浩;吳磊;郭磊;李彥明;;羅氏線圈低頻/高頻模型研究[J];陜西電力;2011年05期

5 王新和,程世洲;曲線擬合的最小二乘法[J];新疆職業(yè)大學(xué)學(xué)報(bào);2004年02期

6 李維波,毛承雄,李啟炎,姚宗干;神光III強(qiáng)激光能源模塊測量線圈研究[J];中國電機(jī)工程學(xué)報(bào);2003年05期

7 富明慧;梁華力;;一種改進(jìn)的精細(xì)-龍格庫塔法[J];中山大學(xué)學(xué)報(bào)(自然科學(xué)版);2009年05期

8 陳新琪;顧益磊;裘鵬;劉正富;翁華;徐政;;大規(guī)模交直流系統(tǒng)電磁暫態(tài)仿真關(guān)鍵技術(shù)[J];中國電力;2012年12期

，

本文編號：1447764