摘要:電能是當今社會的主要能源，隨著經濟社會的不斷發展，我國對電力的需求量也在逐年增加，迄今為止，我國電力工業已經進入了大機組、大電廠、大電力系統、高電壓和高自動化的新階段。這就對電力系統的安全、穩定運行提出了更高的要求，特別是國家正大力發展電力，加大了對大機組、大電廠的投資力度，因此電廠的設計就顯的尤為重要，基于此背景，故將火力發電廠的設計作為本次畢業設計的題目。

　　　本次畢業設計主要是針對2×100MW火電廠進行電氣一次部分的設計。設計的主要內容包括：電氣一次主接線和廠用電系統的構成與設計、短路電流計算、導體與電氣設備的設計與選擇。通過已知的原始資料，在結合相關的工程實踐，本次設計較好的完成了2×100MW火電廠電氣一次部分的設計，電氣主接線，導體，電氣設備的設計，都是經過理論的驗證和嚴格的計算，最后設計出了滿足火電廠安全運行的電氣一次部分，所有設計的內容均在計算機上完成，所設計出的火電廠電氣主接線圖紙在AUTOCAD上繪制完成。

關鍵詞：一次主接線 ；短路電流計算；導體 ；電氣設備

Abstract: The electricity is the main energy in today's society, with the development of social economy, China's demand for power in increase year by year, so far, our country electric power industry has entered the big unit, big power plant, big power system, high voltage and high automation of the new stage. This is in power system security and stable operation of a higher demand, especially the country is developing power, increase the power of large unit, the investment, so the design of the power plant on the significant particularly important, based on this background, the design of coal-fired power plants as the graduation design topic. 

　　　The graduation design is mainly aimed at 2 x 100 MW coal-fired power plant electrical a part of the design. The design of the main content includes: electrical a Lord wiring and factory electricity the structure of the system and design;Short-circuit, current calculation; Conductor and electrical equipment in the design and selection. Through the known original material, in combination with the engineering practice of related, the design good has completed 2 x 100 MW coal-fired power plant electrical a part of the design, the main electrical wiring, the conductor, electrical equipment design, it is through the verification, and strict theoretical calculation, and finally designed to meet the safe operation of the electric power is a part, all of the content is designed on the computer to complete, the design of the main electrical wiring drawings in thermal power plants on the painted AUTOCAD.

Keywords: A lord connects the line Go together;the electricity device; Electricity        Conductor;  Electricity equipments.