發(fā)布時(shí)間：2018-11-25 07:40

【摘要】：隨著科學(xué)技術(shù)的進(jìn)步和經(jīng)濟(jì)的發(fā)展,電力電網(wǎng)發(fā)展速度也隨之增快,這對(duì)電網(wǎng)的設(shè)計(jì)和電力一、二次設(shè)備的選型要求也有所提高。330kV及以上等級(jí)的變電站在西部建設(shè)中迅猛發(fā)展,由于建設(shè)地理?xiàng)l件的錯(cuò)綜復(fù)雜和其他客觀條件限制,如何設(shè)計(jì)樞紐330kV變電站和高效利用電氣設(shè)備是西北電網(wǎng)建設(shè)、改造中,需要研究和解決的一個(gè)重要課題。本文以西北某330kV變電站為例,實(shí)際分析了該變電站設(shè)計(jì)運(yùn)行中存在的問(wèn)題,并提出了一定的改進(jìn)方案。論文的主要內(nèi)容如下:首先,本文在總結(jié)其發(fā)展成果的基礎(chǔ)上,研究了國(guó)內(nèi)外330kV變電站設(shè)計(jì)領(lǐng)域的發(fā)展情況,根據(jù)實(shí)際工程要求,提出了330kV變電站的設(shè)計(jì)目標(biāo)。新建的月牙湖330kV變電站不但可以提高銀川市濱河新區(qū)供電質(zhì)量的可靠性還能滿足銀川市濱河新區(qū)新增負(fù)荷的供電需求。本文對(duì)月牙湖330kV變電站的概括從安全性、經(jīng)濟(jì)性及可靠性方面考慮,確定了三個(gè)等級(jí)的主接線方式,根據(jù)負(fù)荷計(jì)算及短路電流確定了主變壓器臺(tái)數(shù)、容量及型號(hào),通過(guò)Matlab/Simulink軟件搭建模型進(jìn)行穩(wěn)態(tài)仿真分析。逐一對(duì)斷路器、隔離開(kāi)關(guān)、互感器進(jìn)行了選型,并設(shè)計(jì)了相關(guān)繼電保護(hù)配置和電氣設(shè)備平面布置,使變電站電氣一、二次部分的設(shè)計(jì)基本完成。根據(jù)變電站的負(fù)荷、主接線方式和設(shè)備的運(yùn)行情況,對(duì)電氣設(shè)備進(jìn)行了評(píng)估分析,統(tǒng)計(jì)電氣設(shè)備故障情況,體現(xiàn)出當(dāng)前變電站設(shè)計(jì)上的功能性不足。例舉現(xiàn)場(chǎng)設(shè)備故障,利用Matlab軟件搭建模型對(duì)變壓器和繼電保護(hù)裝置進(jìn)行系統(tǒng)的仿真分析,運(yùn)用現(xiàn)場(chǎng)試驗(yàn)數(shù)據(jù)的“標(biāo)準(zhǔn)對(duì)比法”分析出互感器故障的原因。通過(guò)總結(jié)主要一、二次設(shè)備故障產(chǎn)生的原因,提出相關(guān)整改預(yù)防措施,從而達(dá)到設(shè)備能正常運(yùn)行的目的。針對(duì)變電站直流系統(tǒng)運(yùn)行存在的問(wèn)題及對(duì)策進(jìn)行了分析討論。結(jié)合實(shí)際情況給出了對(duì)應(yīng)的解決措施。在現(xiàn)有直流系統(tǒng)的基礎(chǔ)上提出了優(yōu)化配置方案,通過(guò)Matlab軟件搭建模型進(jìn)行仿真分析來(lái)驗(yàn)證優(yōu)化后的直流系統(tǒng)可靠性。最后介紹了變電站綜合自動(dòng)化系統(tǒng)運(yùn)行中存在的問(wèn)題,提出了防范措施和整改意見(jiàn)。對(duì)原有系統(tǒng)從通信、計(jì)量等裝置的配置提出了優(yōu)化配置方案,進(jìn)行了可靠性計(jì)算分析。
[Abstract]:With the progress of science and technology and the development of economy, the speed of power grid development is also increasing. The selection requirements of secondary equipment have also been improved. Substations of 330kV and above have developed rapidly in the construction of western China, due to the complexity of construction geographical conditions and other objective conditions, How to design the hub 330kV substation and make efficient use of electrical equipment is an important subject to be studied and solved in the construction and transformation of Northwest Power Grid. Taking a 330kV substation in Northwest China as an example, this paper analyzes the problems existing in the design and operation of the substation, and puts forward some improvement schemes. The main contents of this paper are as follows: firstly, based on the summary of the development results, this paper studies the development of 330kV substation design field at home and abroad, and puts forward the design objectives of 330kV substation according to the actual engineering requirements. The newly built Yueqihu 330kV substation can not only improve the reliability of power supply quality in Binhe New area of Yinchuan City, but also meet the power supply demand of additional load in Binhe New area of Yinchuan City. In this paper, considering the safety, economy and reliability of the 330kV substation, three grades of main connection mode are determined, and the number, capacity and type of the main transformer are determined according to the load calculation and short-circuit current. The steady state simulation analysis is carried out by building a model with Matlab/Simulink software. The circuit breakers, isolators and transformers are selected one by one, and the relaying protection configuration and the layout of electrical equipment are designed, so that the design of the first and second parts of the substation is basically completed. According to the load of substation, the main connection mode and the operation of equipment, the electrical equipment is evaluated and analyzed, and the fault situation of electrical equipment is counted, which reflects the functional deficiency of substation design at present. In this paper, the system simulation analysis of transformer and relay protection device is carried out by using Matlab software, and the cause of transformer fault is analyzed by using the "standard contrast method" of field test data. By summing up the causes of the main primary and secondary equipment failures, the paper puts forward the relevant preventive measures to achieve the purpose of normal operation of the equipment. The problems and countermeasures of DC system operation in substation are analyzed and discussed. Combined with the actual situation, the corresponding solutions are given. On the basis of the existing DC system, the optimal configuration scheme is proposed, and the reliability of the optimized DC system is verified by the simulation and analysis of the model built by Matlab software. Finally, the problems existing in the operation of substation integrated automation system are introduced, and the preventive measures and corrective suggestions are put forward. The optimal configuration scheme of the original system from communication, metering and other devices is put forward, and the reliability calculation is carried out.
【學(xué)位授予單位】：湖北工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM63

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本文編號(hào)：2355330