【正文】 大學(xué)畢業(yè)設(shè)計(jì) II Abstract The requirement for the reliability of electric Power supply in electric Power system is everincreasingly high with the improvement of rated voltage. The loss incurred by Unreliable equipment insulation far exceeds the value of electrical equipment, but the Insulation test is an important method to demonstrate whether highvoltage electric equipment can run reliably and safely on site .Therefore, for highvoltage test electric equipment with automating current, Power frequency voltage endurance test plays an important role in highvoltage technique. The traditional control circuit of Power frequency voltagewithstand test is a manual relay system posed of relay and cont. actor, which Performs operating sequence and rate change of ascending or descending voltage. Voltage change by manual control is not very accurate, in the meantime, technician must spend time and vigor analyzing and finding the reason of fault. At the same time, there are some weaknesses of Programming plex, expensive, poor antiinterference ability for industrial puter control system. According to these circumstances, this dissertation puts forward a novel Power frequency voltagewithstand control system that the nuclear Part is a PLC, which can be used with manual control system in Parallel. In this dissertation, capacitance divider is selected to measures test voltage in parison with several kinds of cannon highvoltage measurement. In the meanwhile analyzing nominate ponent based on the Improved Fourier Transformations and Designing filter circuit to eliminate harmonic waves of test voltage. The designing of the main circuit of Power frequency voltagewithstand control system which consists contact voltage regulator, test transformer, NPS Protection equipment and so on. The control circuit consists working mode setting, movement sequence control, and voltagewithstand time setting, voltage regulator Position detection and alarming, overcurrent Protection of test circuit etc. In addition, detection circuit of voltage, current, and test voltage are designed and 石家莊鐵道大學(xué)畢業(yè)設(shè)計(jì) III Overvoltage Protection system for transient recovery is developed. Finally, S7300 Program software is applied to Programming and debugging digital signal and analog signal. Furthermore, WINCC interface is made to mate hardware control system to monitor test. The design of software and hardware in this dissertation meets the need of related test standard specifications, improve Precision and scientific of test, and attain the target result by debugging. Key Words: Power Frequency VoltageWithstand Test, Programmable Controller, Control System Design, WINCC 石家莊鐵道大學(xué)畢業(yè)設(shè)計(jì) IV 目錄 摘要 ...............................................................I Abstract ...........................................................I 第一章 緒論 .................................................... 1 關(guān)于工頻耐壓試驗(yàn) ......................................... 1 工頻耐壓試驗(yàn)控制系統(tǒng)研究的目的及意義 ..................... 1 國內(nèi)研究的現(xiàn)狀 ........................................... 4 課題研究的主要工作內(nèi)容 ................................... 5 第二章 試驗(yàn)原理及模擬試驗(yàn)電壓諧波分析 .......................... 6 工頻耐壓試驗(yàn)原理 ......................................... 6 試驗(yàn)電壓測量方法選擇 ..................................... 7 球隙法測量 ........................................... 7 靜電壓表法測量 ....................................... 9 峰值電壓表法測量 .................................... 10 分壓器法測量 ........................................ 11 模擬試驗(yàn)電壓諧波分析 .................................... 15 試驗(yàn)電壓諧波的產(chǎn)生 .................................. 15 諧波分析算法 ........................................ 16 仿真模型及結(jié)果分析 .................................. 17 工頻耐壓試驗(yàn)過程中應(yīng)注意事項(xiàng) ............................ 21 本章小結(jié) ................................................ 23 第三章 工頻耐壓試驗(yàn)控制系統(tǒng)硬件設(shè)計(jì) ........................... 24 控制系統(tǒng)主回路設(shè)計(jì) ...................................... 24 電氣圖設(shè)計(jì)原則 ...................................... 24 石家莊鐵道大學(xué)畢業(yè)設(shè)計(jì) V 工頻耐壓試驗(yàn)對控制系統(tǒng)的要求 ........................ 25 控制系統(tǒng)主回路 ...................................... 25 控制系統(tǒng)控制回路設(shè)計(jì) .................................... 27 控制系統(tǒng)測量電路設(shè)計(jì) .................................... 31 電壓測量電路設(shè)計(jì) .................................... 31 試驗(yàn)電壓測量電路設(shè)計(jì) ................................ 34 電流測量電路設(shè)計(jì) .................................... 34 電源電路設(shè)計(jì) ........................................ 36 電源濾波電路設(shè)計(jì) .................................... 37 PLC 控制系統(tǒng)整體設(shè)計(jì)方案 ................................. 39 暫態(tài)恢復(fù)過電壓的產(chǎn)生及危害 .......................... 40 暫態(tài)恢復(fù)過電壓消除方法 .............................. 40 變頻調(diào)速系統(tǒng)的設(shè)計(jì) ....................................... 41 變頻器型號及相關(guān)參數(shù) ................................ 41 變頻器調(diào)速控制回路 .................................. 42 本章小結(jié) ................................................ 44 第四章 工頻耐壓試驗(yàn)控制系統(tǒng)軟件設(shè)計(jì) ........................... 45 軟件設(shè)計(jì)的主要任務(wù) ...................................... 45 控制系統(tǒng)下位機(jī)程序設(shè)計(jì) .................................. 45 STEP 編程語言 ....................................... 45 STEP 7 程序設(shè)計(jì)步驟 ................................. 46 控制系統(tǒng)主程序設(shè)計(jì) .................................. 47 控制系統(tǒng)子程序設(shè)計(jì) .................................. 51 下位機(jī)程序調(diào)試 ...................................... 54 控制系統(tǒng)上位機(jī)界面設(shè)計(jì) .................................. 54 WINCC 簡介 .......................................... 54 WINCC 組態(tài)界面創(chuàng)建過程 .............................. 55 石家莊鐵道大學(xué)畢業(yè)設(shè)計(jì) VI WINCC 組態(tài)界面 .......................................... 57 初始組態(tài)界面 ........................................ 57 單步控制態(tài)界面 ...................................... 58 連續(xù)控制試驗(yàn)組態(tài)界面 ................................ 58 試驗(yàn)主回路組態(tài)界面 ..............................