【正文】 松元灣 220KV降壓變電所電氣部分的設(shè)計 (說明書 ) 學校：沈陽工程學院 專業(yè)： 發(fā)電廠及其電力系統(tǒng) 發(fā)電 051： 學號： 指導教師： 松元灣 220KV 降壓變電所電氣部分設(shè)計 I 摘要 眾 所周知，設(shè)計工作是工程建設(shè)的關(guān)鍵環(huán)節(jié)，做好設(shè)計工作對工程建設(shè)的工期、質(zhì)量、投資費用和建成投產(chǎn)后的運行安全可靠性和生產(chǎn)的綜合效益，起著決定性的作用。可以說設(shè)計是工程建設(shè)的靈魂。 在本次畢業(yè)設(shè)計中，我主要是對張士開發(fā)區(qū)一次降壓變壓所進行設(shè)計。其內(nèi)容包括對主變壓器、電氣主接線形式的選擇、對短路點進行短路計算以及對主要電氣設(shè)備的選擇和全所的保護配置、防 雷保護的設(shè)計。 設(shè)計中，首先，通過負荷計算選定了主變壓器的容量、臺數(shù)、型式。并根據(jù)任務書中給定的實際情況，初步擬定本所主接線為帶母線形式的，通過可靠性、經(jīng)濟性和靈活性等多方面的綜合比較，確定了本所的電氣主接線形式。短路計算中，在高壓側(cè)和低壓側(cè)各選定一點，作為最大短路點，進行了對稱短路計算和不對稱短路計算。 其次，在設(shè)計中還確定了本所用的主要電氣設(shè)備。如： 高壓 斷路器、隔離開關(guān)、電壓互感器、電流互感器、避雷針以及母線等。 再次，對本所變壓器、母線及主要線路進行了保護配置，并設(shè) 自動重合閘 裝置。通過計算，確定全所防 雷范圍，安裝 避雷針以防止變電所遭受雷擊。 以上是本變電所設(shè) 計的主要內(nèi)容，它們之間相互聯(lián)系，密不可分，構(gòu)成了一個完整的整體，從而 保持證供電的可靠性。 畢業(yè)設(shè)計使我對以前所學有關(guān)電力系統(tǒng)知識加深了理解，學會了靈活運用 。 由此可知，該設(shè)計在我們的大學學習中占有極其重要的作用，也為我們將來走向工作崗位奠定了良好的基礎(chǔ)。通過此次畢業(yè)設(shè)計，使我對變電所的布置結(jié)構(gòu)原理有了初步的了解，對原來不是特別熟悉的知識加深了理解，從而可以培養(yǎng)我們運用所學知識解決實際問題的能力和創(chuàng)新的能力，增強了工程觀念，以便更好的適應工作的需要 。 關(guān)鍵詞 :高壓 變壓器 斷路器 隔離開關(guān) 母線 防雷保護 沈陽工程學院畢業(yè)設(shè)計（論文） II Abstract As we know, designing work is one of engineering developments important link, a wonderful work means the work period, quantity, investment expenses of engineering developments with movement safe and dependable that set up hurl postnatal period with produce of synthesize the performance, rise the function of the decision. So the design is the soul of engineering developments. In this graduate design, I am designing the area of ZhangShi , a declining presses to change to press a proceeding design. Its contents includes the choice to connect the line form to main transformer, electricity lord, pute to a little bit shortcircuit proceeding short circuit and install, defends the protective design in thunder with the protection of the whole to the choice of the main electricity equipments. In designing, first of all is passing the burthen the calculation made selection the capacity, set of the main transformer number, pattern. And according to give the actual circumstance that settle in the mission book, the first step drafts what this lord connect line as to take the bus form, pass the dependable, economic to wait to synthesize the parison in many ways with the vivid, make sure the electricity lord of this connect the line form. In the shortcircuit calculation, is each to make selection point with lowpressure side at the high pressure side, be used as biggest the short circuit orders, proceeding the symmetry shortcircuit calculation with dissymmetry short circuit calculation. Second, make sure that a main electricity for using equipments in design. Such as: breaker and isolation switch, voltage transformer, current transformer, lightning rod and bus. Next, proceeded to this transformer, bus and main circuits the protection install, and establish the recloser. Pass the calculation, make sure the whole defend, the thunder scope, installing the lightning rod in order to prevent change to give or get an electric shock suffers to strike by lightning. Above is this change to give or get an electric shock a main contents for designing, they contacts mutually, inseparable, constituted a plete the whole. Keep the dependable of the certificate power supply. Graduate designing let me learn from the past the concerning electric power system knowledge ,deepen the prehension, academic association use flexibly, in a specific way and all now design inside. Key words: transformer breaker isolation switch bus Defend the thunder protection 目 錄 摘要 ........................................................................................................................................................................................ I ABSTRACT ........................................................................................................................................................................ II 引言 ................................................................................................................................................................................... 1 說明書 ............................................................................................................................................................................... 2 第一章 變壓器的選擇 ................................................................................................................................................... 2 主變?nèi)萘康拇_定 .................................................................................................................................................. 2 .............................................................................................................................................. 2 第二章 電氣主接線的選擇 ......................................................................................................................................... 4 主接線設(shè)計原則 .................................................................................................................................................. 4 主接線設(shè)計的基本要求 ...................................................................................................................................... 4 .......................................................................................................................................................... 4 .......................................................................................................................................................... 4 .......................................................................................................................................................... 5 方案一 雙母線接線形式： .................................................................................................................... 5 方案二 雙母帶旁路接線形式： ...............................................................