【摘要】：隨著我國(guó)能源互聯(lián)網(wǎng)的提出和智能電網(wǎng)的快速發(fā)展,僅利用本地信息和簡(jiǎn)單時(shí)間與靈敏性配合的傳統(tǒng)保護(hù)模式逐漸顯露出其固有的弊端,通過(guò)引入多信息來(lái)改善和提高傳統(tǒng)保護(hù)的性能,已成為當(dāng)前研究的熱點(diǎn)。本文立足新一代智能變電站研究與設(shè)計(jì)的項(xiàng)目背景,從智能電網(wǎng)對(duì)繼電保護(hù)的新要求出發(fā),設(shè)計(jì)了集保護(hù)體系、具體原理、可靠性驗(yàn)證為一體的保護(hù)配置方案。本文在研究分析了現(xiàn)有智能變電站保護(hù)配置和解決方案的基礎(chǔ)上,提出了解決智能站保護(hù)體系架構(gòu)的三點(diǎn)意見(jiàn),即明確智能站保護(hù)體系與傳統(tǒng)保護(hù)設(shè)備和原理的協(xié)調(diào)關(guān)系,明確智能站保護(hù)體系與全網(wǎng)保護(hù)體系的架構(gòu),明確智能站保護(hù)體系下的保護(hù)功能實(shí)現(xiàn)。在以上意見(jiàn)的指導(dǎo)下,分別從保護(hù)的功能實(shí)現(xiàn)和保護(hù)的地理約束出發(fā),建立了智能站保護(hù)保護(hù)功能一體化配置的兩個(gè)體系,即由主保護(hù)、域保護(hù)和后備保護(hù)組成的三層保護(hù)功能體系;和由就地保護(hù)、站域保護(hù)和廣域保護(hù)組成的三層保護(hù)機(jī)制體系。本文同時(shí)對(duì)兩個(gè)體系的實(shí)現(xiàn)邏輯和內(nèi)在機(jī)理進(jìn)行了較為細(xì)致的描述,并對(duì)其具體功能的實(shí)現(xiàn)方式進(jìn)行了開(kāi)放性的闡述。提出了一種基于邏輯量的智能變電站站域保護(hù)實(shí)現(xiàn)方案,立足于上述體系,根據(jù)變電站現(xiàn)有保護(hù)冗余信息邏輯量,結(jié)合變電站繼電器及斷路器的動(dòng)作狀態(tài),構(gòu)建邏輯值與故障情況匹配函數(shù),在變電站元件拓?fù)渥詣?dòng)更新的基礎(chǔ)上,快速定位單個(gè)或多重故障區(qū)域,并對(duì)匹配結(jié)果進(jìn)行定性的可靠性檢驗(yàn)。針對(duì)站內(nèi)各一次設(shè)備或間隔可能出現(xiàn)的故障情況,設(shè)計(jì)了每個(gè)保護(hù)范圍的判定方法和動(dòng)作方案。當(dāng)變電站范圍內(nèi)發(fā)生故障時(shí),通過(guò)站域邏輯量的協(xié)調(diào)配合,可有選擇地快速隔離故障。通過(guò)變電站故障案例分析結(jié)果表明證明該方案中提出的算法本身具有一定的容錯(cuò)性,且這個(gè)解決方案對(duì)傳統(tǒng)保護(hù)按時(shí)間及靈敏度整定配合難的問(wèn)題有了根本性的改善,有效提高了變電站站內(nèi)一次設(shè)備的保護(hù)性能,配置靈活,高效可靠。為了證明上述體系和方案帶來(lái)的優(yōu)越性,本文從功能配置可用性出發(fā),利用基于FMEA的可靠性分析方法,對(duì)智能站保護(hù)下的一體化配置體系進(jìn)行了建模、分析和可靠性驗(yàn)證;結(jié)果表明,該保護(hù)體系具有更為合理的體系架構(gòu),較傳統(tǒng)保護(hù)方案可靠性高。本文提出的智能變電站保護(hù)功能一體化配置方案在構(gòu)建完整體系結(jié)構(gòu)的基礎(chǔ)上,提出了面向工程實(shí)際的技術(shù)方案和具體算法,并體系和算法分別進(jìn)行了可靠性分析。所述體系的論證過(guò)程清楚,方案靈活性高,可靠性驗(yàn)證完整明確。目前,本方案所述保護(hù)原理部分已經(jīng)在浙江供電公司相關(guān)站點(diǎn)試運(yùn)行。
[Abstract]:With the introduction of energy Internet and the rapid development of smart grid, the traditional protection mode, which only uses local information and simple time and sensitivity, has gradually revealed its inherent drawbacks. The introduction of multi-information to improve and improve the performance of traditional protection has become the focus of current research. Based on the project background of the research and design of the new generation intelligent substation, this paper designs a protection configuration scheme which integrates the protection system, concrete principle and reliability verification from the new requirements of the smart grid for relay protection. Based on the research and analysis of the existing intelligent substation protection configuration and solutions, this paper puts forward three suggestions to solve the intelligent station protection architecture, that is, to clarify the coordination relationship between the intelligent station protection system and the traditional protection equipment and principle. The structure of the intelligent station protection system and the whole network protection system is defined, and the protection function is realized under the intelligent station protection system. Under the guidance of the above opinions, starting from the realization of the protection function and the geographical restriction of the protection, two systems of the integrated configuration of the protection function of the intelligent station, namely, the main protection, are established. Three-layer protection function system composed of domain protection and backup protection; And a three-layer protection mechanism system consisting of in-situ protection, station protection and wide-area protection. At the same time, the realization logic and internal mechanism of the two systems are described in detail, and the way of realizing the concrete functions of the two systems is described in detail. This paper presents an intelligent substation domain protection scheme based on logical quantity. Based on the above system, according to the existing protection redundancy information logic quantity of substation, combined with the operation state of substation relay and circuit breaker, this paper puts forward an intelligent substation protection scheme based on logical quantity. The matching function of logic value and fault condition is constructed. On the basis of automatic updating of substation component topology, the single or multiple fault areas are quickly located, and the matching results are tested qualitatively for reliability. In view of the possible failure of each equipment or interval in the station, the determination method and action scheme of each protection range are designed. When a fault occurs in the substation, the fault can be isolated selectively and quickly through the coordination of the logical quantity of the station domain. The results of substation fault case analysis show that the proposed algorithm itself has certain fault tolerance, and this solution has a fundamental improvement on the difficult coordination of traditional protection setting according to time and sensitivity. The protection performance of primary equipment in substation station is improved effectively, and the configuration is flexible, efficient and reliable. In order to prove the superiority of the above-mentioned system and scheme, this paper makes use of the reliability analysis method based on FMEA to model, analyze and verify the integrated configuration system under the protection of intelligent station based on the usability of function configuration. The results show that the protection system has a more reasonable architecture and is more reliable than the traditional protection scheme. On the basis of the integrated configuration scheme of intelligent substation protection function proposed in this paper, the engineering-oriented technical scheme and specific algorithm are proposed, and the reliability analysis of the system and algorithm is carried out respectively. The argumentation process of the system is clear, the scheme flexibility is high, and the reliability verification is complete and clear. At present, the protection principle of this scheme has been tested in Zhejiang Power supply Company.
【學(xué)位授予單位】：華北電力大學(xué)(北京)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TM63;TM76

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