【正文】 I 摘 要 本次設(shè)計的內(nèi)容為 110kV 變電站一次及二次系統(tǒng)的的設(shè)計。本篇論文主要針對變電站設(shè)計過程中的負(fù)荷的統(tǒng)計與計算，電氣主接線方案的提出與確定，短路電流的計算，電氣設(shè)備的選擇及校驗(yàn)，繼電保護(hù)，二次接線，防雷保護(hù)等方面進(jìn)行了論述。在本次設(shè)計中，為了盡可能使設(shè)計貼近實(shí)際生活，查閱和參考了大量資料，請教了多位老師，最終完成了本次設(shè)計。 在我國始終存在一個嚴(yán)重的問題：絕大部分的供電網(wǎng)絡(luò)基礎(chǔ)比較薄弱，但是供電的半徑卻由于地理原因而很長，造成的結(jié)果就是電力在線路上傳輸時的損耗較大，導(dǎo)致的結(jié)果就是傳輸?shù)骄€路末端時用戶的電壓過低，從而對人民的正常的生產(chǎn)和生活影響。為了滿足人民生活用電兼顧工農(nóng)業(yè)發(fā)展，所以本次設(shè)計選擇了設(shè)計一座 110kV 變電站。本變電站主要用于負(fù)擔(dān)地方性負(fù)荷，包含的負(fù)荷區(qū)域內(nèi)大部分負(fù)荷均為三類負(fù)荷，其余只有一處為二類負(fù)荷，為了保證供電的穩(wěn)定性和可靠性，設(shè)計中盡可能選用電氣性能好的新型設(shè)備，同時為了兼顧經(jīng)濟(jì)性的原則，選用的設(shè)備在保證性能 的同時應(yīng)盡可能選擇價格合適的設(shè)備。 110kV單回路進(jìn)線，本變所有一處二類負(fù)荷，其余均為三類負(fù)荷，生活用電和工業(yè)負(fù)荷比重較大，共有 8條 10kV 出線。本變電所裝設(shè)兩臺等容量主變，主變采用雙繞組變壓器 SF7?10000 110? 型變壓器。斷路器型號根據(jù)系統(tǒng)要求及安裝地點(diǎn)綜合選擇 ZN5?10 630? 型 ， 電壓互感器同樣根據(jù)額定電壓和用途 、 安裝地點(diǎn)綜合考慮 選擇 JDZX10型電壓互感器。 10kV側(cè)的電力電容器按照規(guī)程的要求需要裝設(shè)過電壓保護(hù)以及無時限過電流裝置。而在 10kV的出線處，同樣按要求需要安裝速斷保護(hù)和過電流保護(hù)。主 變壓器處按規(guī)程要求需要安裝過電流、過負(fù)荷保護(hù)，瓦斯保護(hù)以及電流速斷等保護(hù)。 關(guān)鍵詞： 110kV變電所；主接線；電氣設(shè)備；繼電保護(hù) II Design of primary and secondary system of 110kVsubstation Abstract The design of the 110kV substation for the primary and secondary system design. This paper mainly focuses on the statistics and calculation of the load in the substation design process, the formulation and determination of the main electrical wiring scheme, the calculation of the short circuit current, the selection and verification of the electrical equipment, the relay protection, the secondary wiring, the lightning protection Aspects were discussed. In this design, in order to make the design as close as possible to the actual life, access and reference a lot of information, ask a number of teachers, and ultimately pleted this design. There is always a serious problem in our country: the vast majority of the power supply work is relatively weak, but the radius of the power supply is long due to geographical reasons, the result is the power transmission on the line when the loss is large, resulting in the result is the transmission To the end of the line when the user39。s voltage is too low, thus the people39。s normal production and life impact. In order to meet the people living electricity bined with industrial and agricultural development, so this design chose to design a 110kV substation. The substation is mainly used to bear the local load, including the load area of the majority of the load are three types of load, and the remaining only one for the second class load, in order to ensure the stability and reliability of power supply, the design as much as possible to use electrical performance Good new equipment, and in order to take into account the principle of economy, the choice of equipment to ensure the performance at the same time as much as possible to choose the right price equipment. 110kV single loop into the line, the change of all the two types of load, the rest are three types of load, the proportion of domestic electricity and industrial load larger, a total of eight 10kv outlet. The substation installed two equalcapacity main transformer, the main transformer dualwinding transformer SF7?10000 110? type transformer. Breaker type According to the system requirements and installation location Comprehensive selection ZN5?10 630? type, the voltage transformer also according to the rated voltage and use, installation site to consider the choice of JDZX10type voltage transformer. 10kV side of the power capacitor in accordance with the requirements of the requirements of the installation of overvoltage protection and no time limit over current device. And in the 10kV outlet, the same requirements as required to install quickbreak protection and overcurrent protection. The main transformer according to the regulations require the installation of overcurrent, overload protection, gas protection and current quickbreak protection. Key words: 110kV substation。 main wiring。 electrical equipment。 relay protection III 目 錄 摘 要 ..............................................................................................................................I ABSTRACT .................................................................................................................... II 1 前言 ......................................................................................................................... 1 變電站一次及二次設(shè)備的發(fā)展 .............................................................................. 1 變電站一次設(shè)備的發(fā)展 ..................................................................................... 1 變電站二次的發(fā)展 ............................................................................................ 1 2 設(shè)計說明書 ............................................................................................................... 3 負(fù)荷統(tǒng)計表 .......................................................................................................... 3 3 電氣主接線設(shè)計 ........................................................................................................ 4 方案的提出 .......................................................................................................... 4 兩種方案之間的比較 ............................................................................................ 4 4 負(fù)荷計算與主變壓器的選擇 ...................................................................................... 5 負(fù)荷計算 .............................................................................................................. 5 變電所最大負(fù)荷計算 ............................................................................................ 5 主變臺數(shù)、容量和型號的確定 .............................................................................. 6 變電站主變壓器臺數(shù)的確定 .................................................................. 6 主變?nèi)萘康拇_定 ..................................................................................... 6 5 短路電流 ......................................