本文選題：智能變電站　切入點(diǎn)：繼電保護(hù)　出處：《廣東工業(yè)大學(xué)》2014年碩士論文

【摘要】：基于IEC61580標(biāo)準(zhǔn)的智能變電站保護(hù)控制體系構(gòu)筑在網(wǎng)絡(luò)通信基礎(chǔ)上,信息網(wǎng)絡(luò)化傳輸可以實(shí)現(xiàn)高度信息共享,但是其實(shí)時(shí)性、安全性和可靠性直接決定了保護(hù)控制決策的有效性。而且智能變電站繼電保護(hù)將原來(lái)獨(dú)立繼電保護(hù)裝置的功能分解在不同的IED(intelligent electronics device)中實(shí)現(xiàn),從而使得影響繼電保護(hù)可靠性的因素和環(huán)節(jié)更加復(fù)雜和多元化。這些變化使得智能變電站的繼電保護(hù)系統(tǒng)從系統(tǒng)結(jié)構(gòu)和元件構(gòu)成較傳統(tǒng)變電站有很大的差異。如何對(duì)智能變電站繼電保護(hù)系統(tǒng)進(jìn)行準(zhǔn)確的可靠性評(píng)估,發(fā)現(xiàn)系統(tǒng)中的薄弱環(huán)節(jié)并加以改正,提高保護(hù)的可靠性,具有較大的理論和實(shí)際價(jià)值。 本文首先對(duì)智能變電站進(jìn)行了簡(jiǎn)單的介紹,在此基礎(chǔ)上分析了其繼電保護(hù)系統(tǒng)組成,然后以國(guó)電南自的廣東電網(wǎng)220kV智能變電站方案中過(guò)程層網(wǎng)絡(luò)接線方式為原型,采用可靠性框圖構(gòu)建了智能變電站在SV和GOOSE報(bào)文分網(wǎng)傳輸?shù)慕Y(jié)構(gòu)可靠性模型,最后采用最小路集和不交化算法,研究實(shí)際變電站主變保護(hù)、110kV線路保護(hù)、220kV線路保護(hù)和母線保護(hù)的可靠性。結(jié)果表明,在報(bào)文分網(wǎng)傳輸方式下,線路保護(hù)和主變保護(hù)的可靠性相當(dāng),母線保護(hù)的可靠性很低。 緊接著論文深入到元件層面,將元件重要度分析引入到智能變電站繼電保護(hù)系統(tǒng)中。選擇Birnbaum重要度、參數(shù)敏感性和關(guān)鍵重要度三個(gè)指標(biāo)用于評(píng)測(cè)智能變電站繼電保護(hù)系統(tǒng)的元件重要度,并對(duì)結(jié)果進(jìn)行了分析,通過(guò)Birnbaum重要度和參數(shù)敏感性可以幫助設(shè)計(jì)工作者定位系統(tǒng)中的薄弱元件,更好進(jìn)行系統(tǒng)的前期規(guī)劃和設(shè)計(jì)：關(guān)鍵重要度用于系統(tǒng)運(yùn)行階段幫助檢修人員合理分配維修資源以提高檢修效率。 最后論文針對(duì)母線保護(hù)可靠性過(guò)低的問(wèn)題,采用了環(huán)型網(wǎng)絡(luò)結(jié)構(gòu)的以太網(wǎng)冗余技術(shù),并且構(gòu)建了新方案下母線保護(hù)的可靠性框圖,通過(guò)計(jì)算結(jié)果對(duì)比發(fā)現(xiàn)改進(jìn)方案母線保護(hù)的各可靠性指標(biāo)都有比較明顯的提升 本論文受到國(guó)家自然科學(xué)基金項(xiàng)目(51377026)的資助。
[Abstract]:The intelligent substation protection control system based on IEC61580 standard is built on the basis of network communication. The safety and reliability directly determine the effectiveness of the protection control decision, and the function of the original independent relay protection device is decomposed into different IED(intelligent electronics device by intelligent substation relay protection. As a result, the factors and links affecting the reliability of relay protection are more complex and diversified. These changes make the relay protection system of intelligent substation more different from the traditional substation in terms of system structure and component composition. How to evaluate the reliability of intelligent substation relay protection system accurately, It is of great theoretical and practical value to find the weak links in the system and correct them to improve the reliability of the protection. This paper first introduces the intelligent substation, then analyzes its relay protection system composition, and then takes the process layer network connection mode in the 220kV smart substation scheme of Guangdong power grid as the prototype. The reliability block diagram is used to construct the structural reliability model of intelligent substation transmission in SV and GOOSE packet separation networks. Finally, the minimum path set and disjoint algorithm are adopted. The reliability of line protection and bus protection for 110kV line protection and bus protection in substation is studied. The results show that the reliability of line protection and main transformer protection is equal to that of main transformer protection under packet separation transmission mode, but the reliability of bus protection is very low. Then the paper goes deep into the component level and introduces the component importance analysis into the intelligent substation relay protection system. Select the Birnbaum importance. Three indexes of parameter sensitivity and critical importance are used to evaluate the component importance of intelligent substation relay protection system, and the results are analyzed. Through Birnbaum importance and parameter sensitivity, the designer can help to locate the weak components in the system. Better pre-planning and design of the system: the key importance degree is used to help the maintenance personnel to allocate the maintenance resources to improve the maintenance efficiency. Finally, aiming at the low reliability of busbar protection, the Ethernet redundancy technology of ring network structure is adopted, and the reliability block diagram of bus protection under the new scheme is constructed. By comparing the calculation results, it is found that the reliability indexes of the improved bus protection are obviously improved. This paper is supported by the National Natural Science Foundation of China (51377026).
【學(xué)位授予單位】：廣東工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM63;TM77

【引證文獻(xiàn)】

相關(guān)期刊論文 前10條

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相關(guān)碩士學(xué)位論文 前2條

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2 胡凡;智能變電站二次系統(tǒng)可靠性評(píng)估[D];山東大學(xué);2015年

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本文編號(hào)：1700139