變壓器差動保護及勵磁涌流識別研究
發(fā)布時間：2018-10-15 17:13
【摘要】：電力變壓器是重要的電力設(shè)備,在實際應(yīng)用中,要求電力變壓器等電力設(shè)備長時間連續(xù)運轉(zhuǎn),這就不可避免的會誘導(dǎo)電力變壓器等電力設(shè)備出現(xiàn)故障和事故。當(dāng)其發(fā)生故障時,不僅會危及電網(wǎng)安全,而且嚴重時會造成重大經(jīng)濟財產(chǎn)損失。因此,為了監(jiān)測變壓器的內(nèi)部運行狀態(tài),實時精確的辨別出變壓器的潛伏性故障,有必要采取合理有效的保護性措施。變壓器的縱差保護最需要迫切解決的難題是怎樣精確的辨識出勵磁涌流和內(nèi)部短路故障電流,本文基于此作了相關(guān)的研究和分析,給出了一種新的辨識方法。另外,針對變壓器的微機保護裝置,本文以嵌入式技術(shù)為基礎(chǔ),給出了軟硬件的保護設(shè)計。本文的大致內(nèi)容如下:首先,介紹與研究了變壓器縱差保護的背景和意義,對縱差保護中的重難點作了理論分析;其次,研究分析了變壓器縱差保護的基本原理、勵磁涌流的特點以及幾種在實際中經(jīng)常用到的辨識勵磁涌流的判據(jù),同時,研究分析了變壓器微機縱差保護的判據(jù)和算法。接著,詳細的介紹了相空間重構(gòu)的理論,并以此為基礎(chǔ),重點利用3個幾何不變量(關(guān)聯(lián)維數(shù)、Kolmogorov熵和Lyapunov指數(shù))來辨識變壓器勵磁涌流和內(nèi)部短路故障電流。另外,通過MATLAB/SIMUL1NK軟件搭建變壓器的勵磁涌流和內(nèi)部短路故障電流的模型框架,針對變壓器在不同條件下的運行狀況實施模擬實驗,并重點研究和分析了仿真出來的勵磁涌流和內(nèi)部短路故障電流的波形和數(shù)據(jù)之間的差別。最后,給出了基于TMS320F28335DSP的變壓器繼電保護裝置的部分硬件模塊的設(shè)計,并針對硬件設(shè)計部分給出了部分主要的軟件設(shè)計流程圖。
[Abstract]:Power transformer is an important power equipment. In practical application, power transformer and other power equipment are required to run continuously for a long time, which will inevitably lead to power transformer and other power equipment failures and accidents. When the fault occurs, it will not only endanger the security of power grid, but also cause serious economic property losses. Therefore, it is necessary to take reasonable and effective protective measures in order to monitor the internal operation state of transformers and identify the latent faults of transformers in real time and accurately. The most urgent problem of transformer differential protection is how to accurately identify the inrush current and internal short-circuit fault current. Based on this, a new identification method is proposed. In addition, based on embedded technology, the protection design of hardware and software is given for the microcomputer protection device of transformer. The main contents of this paper are as follows: firstly, the background and significance of transformer differential protection are introduced and studied, and the important and difficult points in transformer differential protection are theoretically analyzed. Secondly, the basic principle of transformer differential protection is studied and analyzed. The characteristics of inrush current and several criteria for identification of inrush current are often used in practice. At the same time, the criterion and algorithm of microcomputer differential protection for transformer are studied and analyzed. Then, the theory of phase space reconstruction is introduced in detail, and based on this theory, three geometric invariants (correlation dimension, Kolmogorov entropy and Lyapunov exponent) are used to identify inrush current and internal short-circuit fault current of transformer. In addition, the model frame of the inrush current and the internal short-circuit fault current of the transformer is built by MATLAB/SIMUL1NK software, and the simulation experiment is carried out according to the operation condition of the transformer under different conditions. The difference between the waveform and data of excitation inrush current and internal short-circuit fault current is studied and analyzed. Finally, the design of some hardware modules of transformer relay protection device based on TMS320F28335DSP is given, and some main software flow charts are given for the hardware design part.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM774
本文編號：2273236
[Abstract]:Power transformer is an important power equipment. In practical application, power transformer and other power equipment are required to run continuously for a long time, which will inevitably lead to power transformer and other power equipment failures and accidents. When the fault occurs, it will not only endanger the security of power grid, but also cause serious economic property losses. Therefore, it is necessary to take reasonable and effective protective measures in order to monitor the internal operation state of transformers and identify the latent faults of transformers in real time and accurately. The most urgent problem of transformer differential protection is how to accurately identify the inrush current and internal short-circuit fault current. Based on this, a new identification method is proposed. In addition, based on embedded technology, the protection design of hardware and software is given for the microcomputer protection device of transformer. The main contents of this paper are as follows: firstly, the background and significance of transformer differential protection are introduced and studied, and the important and difficult points in transformer differential protection are theoretically analyzed. Secondly, the basic principle of transformer differential protection is studied and analyzed. The characteristics of inrush current and several criteria for identification of inrush current are often used in practice. At the same time, the criterion and algorithm of microcomputer differential protection for transformer are studied and analyzed. Then, the theory of phase space reconstruction is introduced in detail, and based on this theory, three geometric invariants (correlation dimension, Kolmogorov entropy and Lyapunov exponent) are used to identify inrush current and internal short-circuit fault current of transformer. In addition, the model frame of the inrush current and the internal short-circuit fault current of the transformer is built by MATLAB/SIMUL1NK software, and the simulation experiment is carried out according to the operation condition of the transformer under different conditions. The difference between the waveform and data of excitation inrush current and internal short-circuit fault current is studied and analyzed. Finally, the design of some hardware modules of transformer relay protection device based on TMS320F28335DSP is given, and some main software flow charts are given for the hardware design part.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM774
【參考文獻】
相關(guān)期刊論文 前10條
1 張小釩;蘭生;;變壓器勵磁涌流的識別方法綜述[J];電氣開關(guān);2016年03期
2 熊稚莉;梁大開;李彤椺;史璐;賈鴻宇;;基于關(guān)聯(lián)維數(shù)的光纖布拉格光柵的沖擊定位[J];中國激光;2016年08期
3 王青亞;陳靈峰;;基于MATLAB的高壓廠用變壓器空載合閘仿真[J];浙江水利水電學(xué)院學(xué)報;2016年02期
4 劉政;張嘉藝;羅浩林;鄧可月;;混沌對流下的半固態(tài)A356鋁合金初生相形貌演變研究[J];金屬學(xué)報;2016年02期
5 武靜;張偉偉;聶振華;馬宏偉;楊飛;;基于Lyapunov指數(shù)的管道超聲導(dǎo)波小缺陷定位實驗研究[J];振動與沖擊;2016年01期
6 毛向東;袁惠群;孫華剛;;關(guān)聯(lián)維數(shù)和Kolmogorov熵在變速箱狀態(tài)判別中的關(guān)聯(lián)性[J];機床與液壓;2015年13期
7 楊凌;蒲中柱;黃麟;鄧平聆;蘇婧;;有源磁控憶阻器的等效電路及濾波頻率特性研究[J];電子元件與材料;2015年07期
8 胡鞍鋼;鄢一龍;姜佳瑩;;“十三五”規(guī)劃及2030年遠景目標的前瞻性思考[J];行政管理改革;2015年02期
9 王東;李煒;沈奇威;;撥測系統(tǒng)探針端的設(shè)計與實現(xiàn)[J];電信工程技術(shù)與標準化;2015年01期
10 羅維求;張曉惠;;基于補償勵磁涌流的變壓器差動保護改進方法[J];國網(wǎng)技術(shù)學(xué)院學(xué)報;2014年04期
，本文編號：2273236
本文鏈接：http://sikaile.net/kejilunwen/dianlidianqilunwen/2273236.html
最近更新
教材專著
