本文關(guān)鍵詞：和應(yīng)涌流對(duì)保護(hù)影響及對(duì)策的研究　出處：《山西大學(xué)》2014年碩士論文　論文類(lèi)型：學(xué)位論文

  更多相關(guān)文章： 變壓器 和應(yīng)涌流 繼電保護(hù) MATLAB仿真 小波分析

【摘要】：隨著經(jīng)濟(jì)社會(huì)的不斷進(jìn)步,科學(xué)技術(shù)與信息化的發(fā)展壯大,全球資源和能源暴露出越來(lái)越多的問(wèn)題,這些問(wèn)題也重重沖擊著電力行業(yè)。面對(duì)可持續(xù)發(fā)展提出的要求,敢于正視問(wèn)題,勇于承擔(dān)責(zé)任的電力行業(yè)積極作出響應(yīng),全力推動(dòng)智能電網(wǎng)的向前發(fā)展,這也促使對(duì)繼電保護(hù)裝置性能的加強(qiáng)必須落到實(shí)處。保護(hù)裝置作為電力系統(tǒng)的第一道防線(xiàn),以及變壓器在電力系統(tǒng)中關(guān)鍵地位,使得變壓器保護(hù)與整個(gè)電力系統(tǒng)的關(guān)系為牽一發(fā)而動(dòng)全身,正因如此,對(duì)變壓器保護(hù)的深入研究顯得至關(guān)重要。本文主要研究的是變壓器和應(yīng)涌流,首先對(duì)和應(yīng)涌流的產(chǎn)生過(guò)程的理論進(jìn)行分析,然后使用MATLAB軟件搭建了三種類(lèi)型的和應(yīng)涌流模型,對(duì)和應(yīng)涌流的產(chǎn)生和部分影響因素進(jìn)行了直觀生動(dòng)的仿真實(shí)驗(yàn)。在仿真過(guò)程中,本文在已有研究結(jié)論的基礎(chǔ)上,創(chuàng)新的研究了部分因素,這些因素在之前的研究中被忽略,但是卻對(duì)和應(yīng)涌流有著不可忽視的影響。本文還搭建了一種更貼合實(shí)際運(yùn)行狀況的混聯(lián)模型,將串并聯(lián)變壓器兩種情況結(jié)合起來(lái)進(jìn)行綜合分析。總結(jié)了和應(yīng)涌流對(duì)于變壓器差動(dòng)保護(hù)、零序電流保護(hù)、過(guò)電流保護(hù)及其他保護(hù)的影響。然后借助MATLAB中的小波工具箱,選擇合適的小波基對(duì)和應(yīng)涌流波形和各類(lèi)變壓器內(nèi)部故障電流的波形進(jìn)行分解重構(gòu),對(duì)重構(gòu)后的波形進(jìn)行歸納分析,根據(jù)小波變換后和應(yīng)涌流波形的獨(dú)有特征提出一條理論,作為鑒別和應(yīng)涌流的依據(jù)；最后本文利用智能電網(wǎng)環(huán)境下數(shù)字化變電站的優(yōu)勢(shì),提出防止和應(yīng)涌流影響保護(hù)誤動(dòng)的一些簡(jiǎn)單易行的方法。
[Abstract]:With the continuous progress of the economic and social development, science and technology and information technology growth, global energy and resources exposed more and more problems, these problems had impact on the power industry. Facing the sustainable development request, the courage to face the problem of electric power industry, the courage to assume responsibility actively respond to push forward the development of smart grid. This also led to the relay protection device must be carried out to strengthen the performance of the protection device. As the first defense line of power system, and the transformer in the power system the key position, makes the relationship between transformer protection and the electric power system is far-reaching, because of this, in-depth study of transformer protection is very important. This paper mainly studies the transformer sympathetic inrush, first to analyze the sympathetic inrush process theory, and then use the MATLAB software To build three types of sympathetic inrush model on and inrush and some influence factors were simulated vividly. In the simulation process, based on the existing research results, some factors of innovation research, ignored the study of these factors in the past, but on and we should have a negligible impact on current. This paper also built a hybrid model closer to the actual operation situation, the situation of the two kinds of series parallel transformer integrated analysis are summarized. And the inrush current for transformer differential protection, zero sequence current protection, overcurrent protection and other protection effect. Then with the help of the wavelet toolbox in MATLAB, select the appropriate wavelet basis on sympathetic inrush waveform and various transformer internal fault current waveform decomposition and reconstruction, analyzed the reconstructed waveform, according to small A unique theory is put forward after the wave transformation and the characteristics of the inrush waveform. As a basis for identifying and responding to the inrush current, this paper puts forward some simple and feasible methods to prevent and correct the impact of the inrush current by using the advantages of the digitalized substation in the smart grid environment.

【學(xué)位授予單位】：山西大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TM774

【參考文獻(xiàn)】

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1 宋蕓,樂(lè)秀t，

本文編號(hào)：1399080