發(fā)布時(shí)間：2018-05-09 10:05

  本文選題：繼電保護(hù)系統(tǒng) + 隱性故障��； 參考：《天津大學(xué)》2014年碩士論文

【摘要】：隨著電力系統(tǒng)規(guī)模的不斷擴(kuò)大,對(duì)其安全、可靠和穩(wěn)定運(yùn)行的要求也相應(yīng)提高,但是,由于受系統(tǒng)自身因素以及外部擾動(dòng)等的影響,繼電保護(hù)系統(tǒng)作為保障電網(wǎng)安全的第一道防線所帶來(lái)的問(wèn)題也越來(lái)越突出,對(duì)電網(wǎng)穩(wěn)定運(yùn)行和社會(huì)發(fā)展都造成了嚴(yán)重影響。據(jù)調(diào)查顯示,繼電保護(hù)系統(tǒng)隱性故障成為引起保護(hù)不正確動(dòng)作以及推動(dòng)連鎖事故發(fā)生的一個(gè)重要原因。因此,對(duì)隱性故障的特征挖掘、辨識(shí)以及預(yù)警與預(yù)防技術(shù)的研究成為一個(gè)重大而迫切的課題,這對(duì)于保障電力系統(tǒng)的安全可靠運(yùn)行有著極為重要的意義。本文通過(guò)搜閱大量的相關(guān)文獻(xiàn)資料,首先對(duì)隱性故障的基本概念、產(chǎn)生原因和故障表現(xiàn)形式等進(jìn)行了簡(jiǎn)要介紹,在此基礎(chǔ)上總結(jié)了隱性故障現(xiàn)有的研究方法,探究了隱性故障的常用概率模型、脆弱性區(qū)域與脆弱性指數(shù)、風(fēng)險(xiǎn)評(píng)估以及監(jiān)測(cè)與控制方法。通過(guò)深入挖掘隱性故障的產(chǎn)生原因,并結(jié)合國(guó)內(nèi)外發(fā)生的多起大停電事故,對(duì)隱性故障的類型進(jìn)行了系統(tǒng)的劃分,并對(duì)繼電保護(hù)硬件設(shè)備和元件隱性故障進(jìn)行了特征挖掘與辨識(shí)。其中,主要就斷路器操作機(jī)構(gòu)和直流操作回路存在的問(wèn)題進(jìn)行了具體分析,并提出了相應(yīng)的在線監(jiān)視與故障診斷方法。通過(guò)對(duì)高壓斷路器二次回路及操作機(jī)構(gòu)工作特性進(jìn)行分析,指出其分合閘線圈電流信號(hào)中蘊(yùn)含的大量斷路器機(jī)械狀態(tài)信息,并提出一種分合閘線圈電流與最小二乘支持向量機(jī)算法結(jié)合的斷路器隱性故障在線診斷方法,該方法可以準(zhǔn)確地識(shí)別斷路器二次回路及操作機(jī)構(gòu)多種隱性故障類型,為斷路器隱性故障定位和狀態(tài)檢修提供了依據(jù)。通過(guò)分析直流操作回路的工作原理和特點(diǎn),并結(jié)合引起繼電保護(hù)隱性故障的主要問(wèn)題,提出了一種直流操作回路在線監(jiān)視與預(yù)警方法。該方法通過(guò)在線監(jiān)測(cè)直流操作回路流過(guò)的電流,實(shí)現(xiàn)跳、合閘回路完整性的同時(shí)監(jiān)視;利用時(shí)間繼電器在線監(jiān)視跳、合閘回路的工作狀況,實(shí)現(xiàn)跳、合閘回路元件的保護(hù)。最后,利用線路保護(hù)操作箱和斷路器裝置,對(duì)所提出的監(jiān)視與預(yù)警方法進(jìn)行了實(shí)驗(yàn)驗(yàn)證。
[Abstract]:With the continuous expansion of power system scale, the requirements of safe, reliable and stable operation of power system are raised accordingly. However, due to the influence of the system itself and external disturbances, As the first line of defense to ensure the security of the power grid, the relay protection system brings more and more serious problems, which has a serious impact on the stable operation of the power grid and the social development. According to the investigation, the hidden fault of relay protection system has become an important reason to cause incorrect action of protection and promote the occurrence of chain accidents. Therefore, the research of hidden fault feature mining, identification, early warning and prevention technology has become a major and urgent issue, which is of great significance to ensure the safe and reliable operation of power system. In this paper, the basic concepts, causes and forms of hidden faults are briefly introduced, and the existing research methods of hidden faults are summarized. Probabilistic models of hidden faults, vulnerability region and vulnerability index, risk assessment, monitoring and control methods are explored. By digging into the causes of hidden faults and combining with many power outages at home and abroad, the types of hidden faults are systematically divided. The hidden faults of hardware and components of relay protection are mined and identified. The problems existing in the circuit breaker operating mechanism and DC circuit are analyzed, and the corresponding on-line monitoring and fault diagnosis methods are put forward. By analyzing the working characteristics of the secondary circuit and the operating mechanism of the high voltage circuit breaker, it is pointed out that a large amount of mechanical state information of the circuit breaker is contained in the current signal of the switchover coil. An online fault diagnosis method for circuit breakers based on the combination of closing coil current and least square support vector machine (LS-SVM) is proposed. This method can accurately identify the secondary circuit of circuit breaker and various hidden fault types of operating mechanism. It provides basis for hidden fault location and condition maintenance of circuit breaker. By analyzing the working principle and characteristics of DC operation circuit and combining with the main problems that cause hidden fault of relay protection, an on-line monitoring and warning method of DC operation circuit is proposed. By on-line monitoring the current flowing through the DC operating circuit, the method can realize the jump and the integrity of the closing circuit at the same time, and use the time relay to on-line monitor the jump and the working condition of the closing circuit to realize the protection of the trip and closing circuit elements. Finally, the proposed monitoring and early warning method is verified by using line protection operation box and circuit breaker device.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM77

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 湯涌;卜廣全;易俊;;印度“7.30”、“7.31”大停電事故分析及啟示[J];中國(guó)電機(jī)工程學(xué)報(bào);2012年25期

2 徐建源;張彬;林莘;李斌;騰云;;能譜熵向量法及粒子群優(yōu)化的RBF神經(jīng)網(wǎng)絡(luò)在高壓斷路器機(jī)械故障診斷中的應(yīng)用[J];高電壓技術(shù);2012年06期

3 周華良;夏雨;鄒志楊;;帶跳閘回路監(jiān)視的斷路器操作回路設(shè)計(jì)與實(shí)現(xiàn)[J];江蘇電機(jī)工程;2011年06期

4 黃建;胡曉光;鞏玉楠;楊帆;;高壓斷路器機(jī)械故障診斷專家系統(tǒng)設(shè)計(jì)[J];電機(jī)與控制學(xué)報(bào);2011年10期

5 袁金麗;李奎;郭志濤;岳大為;王堯;;基于SVM與合分閘線圈電流參數(shù)的高壓斷路器機(jī)械故障診斷[J];高壓電器;2011年03期

6 宋錦剛;許長(zhǎng)青;朱統(tǒng)亮;;基于波形辨識(shí)技術(shù)的SF_6斷路器分/合閘線圈電流監(jiān)測(cè)[J];電力建設(shè);2011年03期

7 武萬(wàn)才;聶會(huì)軍;邊疆;;一起線路與主變保護(hù)定值配合失當(dāng)?shù)氖鹿史治鯷J];電力系統(tǒng)保護(hù)與控制;2011年02期

8 林晏;呂慶升;;數(shù)字化變電站繼電保護(hù)技術(shù)分析[J];科技信息;2010年27期

9 陳恒;王艷蘋;;智能電網(wǎng)下的繼電保護(hù)技術(shù)探討[J];科技信息;2010年27期

10 楊明玉;田浩;姚萬(wàn)業(yè);;基于繼電保護(hù)隱性故障的電力系統(tǒng)連鎖故障分析[J];電力系統(tǒng)保護(hù)與控制;2010年09期

相關(guān)博士學(xué)位論文 前2條

1 丁理杰;復(fù)雜電網(wǎng)連鎖故障大停電分析與預(yù)防研究[D];浙江大學(xué);2008年

2 唐發(fā)明;基于統(tǒng)計(jì)學(xué)習(xí)理論的支持向量機(jī)算法研究[D];華中科技大學(xué);2005年

相關(guān)碩士學(xué)位論文 前5條

1 彭搏;高壓斷路器在線監(jiān)測(cè)與故障診斷系統(tǒng)的研究[D];上海交通大學(xué);2013年

2 張雷;繼電保護(hù)出口回路監(jiān)測(cè)及狀態(tài)檢修的研究[D];華北電力大學(xué)（北京）;2010年

3 田浩;基于繼電保護(hù)隱性故障的電力系統(tǒng)可靠性分析[D];華北電力大學(xué)（河北）;2010年

4 齊冬梅;霍爾電流傳感器及其自動(dòng)調(diào)測(cè)系統(tǒng)的設(shè)計(jì)[D];上海交通大學(xué);2009年

5 羅小安;基于徑向基神經(jīng)網(wǎng)絡(luò)的高壓斷路器故障診斷應(yīng)用研究[D];西南交通大學(xué);2007年

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