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洛陽理工學院畢業(yè)設計(論文) I 110kV 變電站一次系統(tǒng)設計 摘 要 隨著工業(yè)時代的發(fā)展,電能已經(jīng)成為人類發(fā)展的主要能源,科學合理的駕馭電能必須從電力工程的設計和方法上掌握其精髓,提高電力系統(tǒng)運行的可靠性和穩(wěn)定性。從而達到降低生產(chǎn)成本提供經(jīng)濟效益的目的。本文首先根據(jù)所擬訂的系統(tǒng)與線路及所有負荷的參數(shù),分析負荷發(fā)展趨勢。從負荷增長方面闡明了建站的必要性,然后通過對擬建變電站的概括以及出線方向來考慮,并通過對負荷資料的分析,安全,經(jīng)濟及可靠性方面考慮,確定了 110kV, 35kV, 10kV 以及站用電的主接線,然后又通過負荷計算及供電范圍確定 了主變壓器臺數(shù),容量及型號,同時也確定了站用變壓器的容量及型號,最后,根據(jù)最大持續(xù)工作電流及短路計算的計算結果,對高壓熔斷器,隔離開關,母線,絕緣子和穿墻套管,電壓互感器,電流互感器進行了選型,從而完成了 110kV 變電站一次部分的設計。 關鍵詞: 變電站,變壓器,系統(tǒng)設計,接線 洛陽理工學院畢業(yè)設計(論文) II The Design of Major System of 110kV Substation ABSTRACT With the development of the industrial in years, power had bee the primary energy of the development in our soicety, the scientific and reasonable control of power must be from the electrical engineering design method and grasp its essence, improving the power system reliability and stability. In order to reduce the cost of production is provided. The goal of economic first, the system worked out with the lines and all the load parameters, the analysis of load development trends. Clarify the need for the establishment of the station in terms of load growth, and then to consider the generalization of the proposed substation and outgoing direction, and through the analysis of load information, security, economic and reliability considerations, determine the 110kV, 35kV, 10kV station power wiring, load calculation and supply area and then determine the number of main transformer capacity and model, but also to determine the capacity and model of the substation transformer, and finally, according to the maximum continuous operating current a nd short circuit calculations, selection, highvoltage fuses, isolating switches, busbars, insulators and wall bushings, voltage transformers, current transformers, thus pleting the 110kv substation once part of the design. KEY WORDS: substation, transformer, system design, wiring 洛陽理工學院畢業(yè)設計(論文) III 目 錄 前 言 ....................................................................................................... 1 第 1 章 變電站的分析與設計 ............................................................... 2 變電站負荷情況及所址概況 ................................................... 2 變電站的負荷分析 ................................................................... 3 第二章 電氣主 接線設計 ........................................................................ 6 110kV 電氣主接線 .................................................................... 7 35kV 電氣主接線 ...................................................................... 7 10kV 電氣主接線 ..................................................................... 11 站用電接線 ...............................................................................12 第三章 負荷計算及變壓器選擇 ..........................................................14 負荷計算 ...................................................................................14 站用負荷計算 ...............................................................15 10kV 負荷計算 ..............................................................15 35kV 負荷計算 ..............................................................15 110kV 負荷計算 ............................................................15 主變臺數(shù)、容量和型式的確定 .............................................15 變電 所主變壓器臺數(shù)的確定 .......................................15 變電所主變壓器容量的確定 .......................................15 變電站主變壓器型式的選擇 .......................................16 站用變臺數(shù)、容量和型式的確定 .........................................17 站用變臺數(shù)的確定 .......................................................17 站用變容量的確定 .......................................................17 站用變型式的選擇 .......................................................17 第四章 最大持續(xù)工作電流及短路計算 ..............................................19 各回路最大持續(xù)工作電流 .....................................................19 短路電流計算點的確定和短路電流計算結果 ....................19 第五章 主要電氣設備選擇 ...................................................................27 電氣設備的選擇原 則 .............................................................27 洛陽理工學院畢業(yè)設計(論文) IV 高壓斷路器的選擇 .................................................................28 隔離開關的選擇 .....................................................................29 各級電壓母線及開關柜的選擇 .............................................30 絕緣子和穿墻套管的選擇 .....................................................33 電流互感器的配置和選擇 .....................................................33 參數(shù)選擇 ........................................................................33 型式選擇 ........................................................................33 電壓互感器的配置和選擇 .....................................................35 參數(shù)選擇 .......................................................................35 型式選擇 .......................................................................35 準確度測量 ...................................................................36 各主要電氣設備選擇結果一覽表 .........................................36 第六章 變電站防雷保護 .......................................................................37 防雷保護基本要求 ................................................................37 雷電侵入波保護 ....................................................................38 謝 辭 ........................................................................................................41 參考文獻 ..................................................................................................42 附錄一:短路電流計算公式 ................................................................43 附錄二:電氣主接線圖 .........................................................................46 外文資料翻譯 .........................................................................................48 洛陽理工學院畢業(yè)設計(論文) 1 前 言 電力工業(yè)是國民經(jīng)濟的一項基礎工業(yè)和國民經(jīng)濟發(fā)展的先行工業(yè),它是一種將煤、石油、天然氣、水能、核能、風能等一次能源轉換成電能這個二次