【正文】 hop substation and electrical system design of the factory is the design of power supply has targeted. Set A program to factory powersupply modes, the main equipment selection, protective device configuration and lightning proof grounding system are detailed narrated, content mainly includes high voltage side and low voltage side short circuit calculation, equipment selection and calibration, the main equipment relay protection design, power distribution equipment design, lightning protection and grounding design, etc. This design is given all electrical equipment and calculated to these load. Through the active, calculate the reactive power and ShiZai power transformer size and corresponding choice of main equipment of technical parameters, again according to user requirements of voltage capacitor pensation devices, calculating the requirements of power factor, concluded that the size of the capacitors. According to the agreement with the power supply departments, decided to always match the Lord and distribution system for substation hookup. The main electrical wiring for electrical equipment choice, the distribution place of decorate, operation reliability and flexibility, operation and maintenance of safety and future expansion of electrical engineering, construction and operation, saving the economy by influence. This design in the main equipment of relay protection design and setting calculation of power transformer, vacuum circuit breaker protection configuration of such main equipments proposed requirements, clear the protection setting value calculation method. Key Words: Substation； power distribution systems； load and short circuit calculation；equipment selection； relay protection. III 目 錄 引言 ............................................................................................................................................... 1 第一章 緒論 ................................................................................................................................... 2 畢業(yè)設(shè)計內(nèi)容及研究意義 ................................................................................................... 2 課題的研究現(xiàn)狀和發(fā)展趨勢 ................................................................................................ 2 課程設(shè)計任務(wù)書 ................................................................................................................. 3 第二章 負荷計算及無功功率補償 ................................................................................................... 5 負荷計算的方法 ................................................................................................................. 5 負荷計算 ............................................................................................................................ 6 無功功率補償 ..................................................................................................................... 8 無功補償容量的確定 ........................................................................................................ 10 第三章 主變壓器的選擇 ............................................................................................................... 12 變電所變壓器容量、臺數(shù)、型號選擇 ................................................................................ 12 總變電所位置和型式的選擇 ............................................................................................. 13 變壓器損耗計算 ............................................................................................................... 14 高壓側(cè)無功補 償計算 ........................................................................................................ 15 第四章 電氣主接線 ...................................................................................................................... 16 對電氣主接線的基本要求和原則 ....................................................................................... 16 電氣主接線設(shè)計程序 ........................................................................................................ 17 主接線設(shè)計 ...................................................................................................................... 18 第五章 短路電流的計算 ............................................................................................................... 21 概述 ................................................................................................................................ 21 短路電流的計算 ............................................................................................................... 22 第六章 電氣設(shè)備的選擇 ............................................................................................................... 25 電氣設(shè)備選擇的一般原則 ................................................................................................. 25 斷路器、隔離開關(guān)及互感器的選擇 ................................................................................... 26 變電所進出線的選擇校驗 ................................................................................................. 30 第七章 繼電保護和二次回路的確定 .............................................................................................. 39 概述 ................................................................................................................................ 39 二次回路 ......................................................................................................................... 39 繼電保護 的整定計算 ........................................................................................................ 42 第八章 防雷接地 .......................................................................................................................... 55 變電所的防雷保護 ........................................................................................................... 55 變電所接地裝置的計算 ..