摘要

本文首先根據任務書上所給系統與線路及所有負荷的參數，分析負荷發展趨勢。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，經濟及可靠性方面考慮，確定了變電站的主接線，然后又通過負荷計算及供電范圍確定了主變壓器臺數，容量及型號，同時也確定了站用變壓器的容量及型號，最后，根據最大持續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，電壓互感器，電流互感器進行了選型，從而完成了電氣一次部分的設計。

電氣主接線是發電廠、變電所電氣設計的首要部分，也是構成電力系統的重要環節。主接線的確定對電力系統整體及發電廠、變電所本身的運行的可靠性、靈活性和經濟性密切相關。電能的使用已經滲透到社會、經濟、生活的各個領域，而在我國電源結構中火電設備容量占總裝機容量的75%。本文是對配有300MW 汽輪發電機的大型火電廠一次部分的初步設計，主要完成了電氣主接線的設計。該設計主要從理論上在電氣主接線設計、短路電流計算、電氣設備的選擇、配電裝置的布局、防雷設計、發電機、變壓器和母線的繼電保護等方面做詳盡的論述，并與火力發電廠現行運行情況比較，同時，在保證設計可靠性的前提下，還要兼顧經濟性和靈活性，通過計算論證火電廠實際設計的合理性與經濟性。采用軟件繪制了大量電氣圖和查閱相關書籍，進一步完善了設計。

關鍵詞：變電站；短路電流計算；電氣主接線；發電廠

Abstract

Firstly, this paper analyzes the load development trend according to the parameters of the system, circuit and all loads given in the task book.?The establishment of the clarified the necessity from the aspects of load growth, and then through the proposed generalization of substation and line direction, and through the analysis of load data, safety, economy and reliability into consideration, determine the substation main wiring, then on the main transformer was determined by the load calculation and power supply scope sets, capacity and model number,?At the same time, the capacity and type of transformer used in the station are also determined. Finally, according to the calculation results of the maximum continuous working current and short circuit, the selection of high voltage fuses, isolation switches, busbars, insulators, voltage transformers and current transformers is carried out, so as to complete the design of the electrical primary part.

Main electrical wiring is the primary part of electrical design of power plant and substation, and also constitutes an important link of power system.?The determination of main wiring is closely related to the reliability, flexibility and economy of the whole power system and power plant and substation.?The use of electric energy has penetrated into every field of society, economy and life, and the capacity of thermal power equipment accounts for 75% of the total installed capacity in China's power supply structure.?This paper is a preliminary design of the primary part of a large thermal power plant with a 300MW turbogenerator, mainly completing the design of the main electrical wiring.?This design is mainly from the theory in the main electrical wiring design, short-circuit current calculation, the selection of electrical equipment, power distribution equipment layout, design of lightning protection, generator, transformer and bus do detailed discussion of relay protection, etc, and compared with the current operation of the coal-fired power plants, at the same time, under the premise that guarantees the reliability of the design, but also both economy and flexibility,?The rationality and economy of actual design of thermal power plant are proved through calculation.?Using software to draw a large number of electrical diagrams and refer to relevant books, further improve the design.

Key words: Substation;?Short-circuit current calculation;?Main electrical wiring;?Power plants

完整論文點擊如下鏈接下載：

https://download.csdn.net/download/weixin_45905610/88536898

火電廠電氣部分詳細設計資源-CSDN文庫

CAD圖紙點擊如下鏈接下載：

https://download.csdn.net/download/weixin_45905610/88536900

火電廠電氣部分設計-圖紙資源-CSDN文庫