本文選題：勵(lì)磁設(shè)備改造 + 勵(lì)磁調(diào)節(jié)單元��； 參考：《蘭州理工大學(xué)》2017年碩士論文

【摘要】：隨著科技的高速發(fā)展,無論是社會生產(chǎn)還是人們的日常生活都已離不開電力行業(yè),同時(shí)電力系統(tǒng)運(yùn)行的安全、可靠性是確保社會生產(chǎn)、生活的必要前提條件。電力系統(tǒng)由發(fā)電和輸電兩大部分組成,而勵(lì)磁控制系統(tǒng)是整個(gè)發(fā)電系統(tǒng)的重要組成部分之一,其在整個(gè)電力系統(tǒng)安全、穩(wěn)定運(yùn)行過程中有著不可取代的位置。本課題對水輪發(fā)電機(jī)自并勵(lì)勵(lì)磁控制系統(tǒng)進(jìn)行研究設(shè)計(jì),以達(dá)到改善勵(lì)磁控制系統(tǒng)和提高電力系統(tǒng)穩(wěn)定性的目的。本課題以某水電站勵(lì)磁設(shè)備改造項(xiàng)目為背景,闡述了勵(lì)磁控制系統(tǒng)在整個(gè)發(fā)電系統(tǒng)中的重要作用以及其重要構(gòu)成部分,確定勵(lì)磁控制系統(tǒng)的控制對象和控制目標(biāo);通過參閱國內(nèi)外文獻(xiàn)以及對舊勵(lì)磁控制系統(tǒng)設(shè)備存在的問題進(jìn)行調(diào)研和分析,并以水電自并勵(lì)勵(lì)磁控制系統(tǒng)的電力行業(yè)標(biāo)準(zhǔn)、現(xiàn)場環(huán)境以及本勵(lì)磁控制系統(tǒng)技術(shù)要求為依據(jù),選用適合本勵(lì)磁控制系統(tǒng)的數(shù)字式自并勵(lì)勵(lì)磁調(diào)節(jié)器,提出適合中小型水電勵(lì)磁控制系統(tǒng)的AVR+PID+PSS2A勵(lì)磁控制方式;通過與從事勵(lì)磁控制系統(tǒng)相關(guān)工作的專業(yè)人員進(jìn)行多次溝通,完成整個(gè)水輪發(fā)電機(jī)自并勵(lì)勵(lì)磁控制系統(tǒng)的研究設(shè)計(jì)和檢測實(shí)驗(yàn)。首先,本課題對勵(lì)磁電壓控制、勵(lì)磁電流控制、電力系統(tǒng)穩(wěn)定器和V/Hz限制等進(jìn)行理論模型分析和控制邏輯分析。其次,通過選擇EXC9000作為勵(lì)磁調(diào)節(jié)器,以威綸通觸摸屏為上位機(jī),結(jié)合實(shí)際工程對勵(lì)磁變壓器、整流單元、滅磁及過壓保護(hù)單元進(jìn)行分析,研究設(shè)計(jì)出既經(jīng)濟(jì)又滿足控制系統(tǒng)技術(shù)要求的勵(lì)磁控制系統(tǒng)。再次,通過對勵(lì)磁控制系統(tǒng)的控制流程進(jìn)行相關(guān)分析,完成軟件設(shè)計(jì),即利用威綸通EB8000軟件設(shè)計(jì)編程人機(jī)界面。最后,利用EXC9000 Debug軟件對勵(lì)磁控制系統(tǒng)進(jìn)行測試和參數(shù)校正,并進(jìn)行試驗(yàn)結(jié)果分析。本次課題結(jié)合實(shí)際工程研究設(shè)計(jì)開發(fā)的勵(lì)磁控制系統(tǒng)適用于中小型水電站,目前本勵(lì)磁系統(tǒng)已經(jīng)投運(yùn),運(yùn)行結(jié)果表明本勵(lì)磁系統(tǒng)具有均流系數(shù)高、整流單元散熱性能好、過壓保護(hù)性能好、安全性高等優(yōu)點(diǎn),智能控制不但節(jié)能,且降低了工人的工作強(qiáng)度,增強(qiáng)企業(yè)競爭力,所以本勵(lì)磁系統(tǒng)具有理論研究意義和實(shí)際應(yīng)用價(jià)值。
[Abstract]:With the rapid development of science and technology, both social production and people's daily life have been inseparable from the electric power industry. At the same time, the safety and reliability of power system operation is the necessary prerequisite to ensure social production and life. The power system is composed of two parts: generation and transmission. Excitation control system is one of the important parts of the whole power generation system, and it has an irreplaceable position in the whole power system safe and stable operation process. In order to improve the excitation control system and improve the stability of power system, the self-shunt excitation control system of hydrogenerator is studied and designed in this paper. Based on the retrofit project of the excitation equipment of a hydropower station, the important role of excitation control system in the whole power generation system and its important components are expounded, and the control object and control goal of the excitation control system are determined. By referring to the domestic and international literature and investigating and analyzing the problems existing in the old excitation control system equipment, and based on the power industry standard, field environment and the technical requirements of the excitation control system for hydropower self-shunt excitation control system, The digital self-shunt excitation regulator suitable for the excitation control system is selected, and the AVR PID PSS2A excitation control mode suitable for the small and medium-sized hydropower excitation control system is put forward, and the communication with the professionals engaged in the excitation control system is carried out many times. The research, design and testing experiment of self-shunt excitation control system of hydrogenerator are completed. Firstly, the theoretical model and control logic of excitation voltage control, excitation current control, power system stabilizer and V/Hz limit are analyzed. Secondly, the excitation transformer, rectifier unit, demagnetization unit and overvoltage protection unit are analyzed by selecting EXC9000 as excitation regulator and using the Wirunton touch screen as host computer. The excitation control system, which is economical and meets the technical requirements of the control system, is studied and designed. Thirdly, by analyzing the control flow of excitation control system, the software design is completed, that is, the man-machine interface is designed by using EB8000 software. Finally, the excitation control system is tested and corrected by EXC9000 Debug software, and the test results are analyzed. The excitation control system, which is designed and developed in combination with practical engineering research, is suitable for small and medium-sized hydropower stations. At present, the excitation system has been put into operation. The operation results show that the excitation system has high current sharing coefficient and good heat dissipation performance of rectifier units. The overvoltage protection has the advantages of good performance and high safety. Intelligent control not only saves energy, but also reduces the working intensity of workers and enhances the competitiveness of enterprises. Therefore, the excitation system has theoretical significance and practical application value.
【學(xué)位授予單位】：蘭州理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TP273;TM312

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