發(fā)布時間：2018-05-25 15:04

  本文選題：抽水蓄能 + 雙饋感應(yīng)電機��； 參考：《廣東工業(yè)大學(xué)》2015年碩士論文

【摘要】：目前,我國電力系統(tǒng)建設(shè)正處于快速發(fā)展階段,存在用電高峰時供電緊張、有功無功儲備不足,用電低谷時輸配電容量利用率不高和輸電效率低等問題,發(fā)展具有調(diào)峰填谷,調(diào)頻調(diào)相、事故備用等多種功能的抽水蓄能系統(tǒng),是我國新型電力系統(tǒng)的一個重要組成部分。本文針對傳統(tǒng)抽水蓄能系統(tǒng)所采用的同步水輪機組效率低、轉(zhuǎn)速適應(yīng)能力弱的情況,研究一種基于雙饋方式的抽水蓄能系統(tǒng),通過分析雙饋感應(yīng)電機(DFIG)基本理論的基礎(chǔ)上,探討雙饋型抽水蓄能機組的矢量控制策略,并對機組的零速啟動及同步并網(wǎng)過渡過程進行了仿真和實驗研究。首先,分析國內(nèi)外雙饋式抽水蓄能發(fā)電產(chǎn)業(yè)的發(fā)展現(xiàn)狀和趨勢,介紹抽水蓄能機組啟動方式和雙饋感應(yīng)電機主要控制技術(shù)。其次,分析雙饋型抽水蓄能系統(tǒng)結(jié)構(gòu)模型,介紹雙饋感應(yīng)電機的基本運行機理和坐標(biāo)變換原理,推導(dǎo)雙饋感應(yīng)電機在三相靜止坐標(biāo)系、兩相靜止坐標(biāo)系及同步旋轉(zhuǎn)坐標(biāo)系下的數(shù)學(xué)模型。在此基礎(chǔ)上推導(dǎo)了電網(wǎng)側(cè)變換器數(shù)學(xué)模型,并探討電網(wǎng)側(cè)變換器矢量控制策略,結(jié)合經(jīng)典PI控制技術(shù)、空間矢量控制技術(shù)和三相數(shù)字鎖相環(huán)控制技術(shù),建立基于電網(wǎng)電壓定向的網(wǎng)側(cè)變換器控制框圖,利用Matlab/S imulink建立網(wǎng)側(cè)變換器仿真模型進行分析和研究。通過對電網(wǎng)側(cè)變換器的分析和雙饋感應(yīng)電機轉(zhuǎn)子側(cè)變換器的控制策略研究,提出基于轉(zhuǎn)子側(cè)零速自啟動矢量控制方法,推導(dǎo)了空載并網(wǎng)及發(fā)電運行的控制策略,并對電機啟動過渡到空載并網(wǎng)和功率解耦進行仿真研究。仿真結(jié)果表明,所采用的控制策略能夠?qū)崿F(xiàn)機組自啟動至并網(wǎng)發(fā)電過程,控制簡單,運行可靠。最后,以2.2 KW的雙饋感應(yīng)發(fā)電機為樣機,搭建雙饋式抽水蓄能系統(tǒng)實驗平臺,詳細介紹各個硬件模塊的功能設(shè)計及軟件流程的設(shè)計,完成雙饋型抽水蓄能機組啟動至并網(wǎng)過渡過程的實驗研究。
[Abstract]:At present, the construction of electric power system in our country is in the rapid development stage, there are some problems such as tight power supply at the peak of power consumption, insufficient reserve of active and reactive power, low utilization ratio of transmission and distribution capacity and low transmission efficiency in the period of low power consumption, so the development has the characteristics of peak shaving and valley filling. The pumped storage system with various functions, such as frequency modulation and phase modulation, accident reserve, is an important part of the new power system in China. In this paper, a pumped storage system based on doubly-fed induction motor (DFIGM) is studied, which has low efficiency and weak speed adaptability in the traditional pumped storage system, based on the analysis of the basic theory of doubly-fed induction motor (DFIGM). The vector control strategy of doubly-fed pumped storage unit is discussed, and the zero-speed start-up and synchronous grid-connected transition process of the unit are simulated and experimentally studied. Firstly, the development status and trend of doubly-fed pumped storage power generation industry at home and abroad are analyzed, and the start-up mode of pumped storage unit and the main control technology of doubly-fed induction motor are introduced. Secondly, the structure model of doubly-fed pumped storage system is analyzed, the basic operation mechanism and coordinate transformation principle of doubly-fed induction motor are introduced, and the three-phase static coordinate system of doubly-fed induction motor is deduced. The mathematical model of two phase stationary coordinate system and synchronous rotating coordinate system. On this basis, the mathematical model of grid-side converter is derived, and the vector control strategy of grid-side converter is discussed, which combines classical Pi control technology, space vector control technology and three-phase digital phase-locked loop control technology. The control block diagram of grid-side converter based on grid voltage orientation is established, and the simulation model of grid-side converter based on Matlab/S imulink is analyzed and studied. Based on the analysis of the grid-side converter and the study of the control strategy of the rotor side converter of the doubly-fed induction motor, a zero-speed self-starting vector control method based on the rotor side is proposed, and the control strategy of no-load grid-connected and generating operation is deduced. Simulation research on the transition of motor start to No-load grid-connected and power decoupling is carried out. The simulation results show that the proposed control strategy can realize the process from start-up to grid-connected generation, and the control is simple and the operation is reliable. Finally, taking the 2.2 KW doubly-fed induction generator as the prototype, the experimental platform of the doubly-fed pumped storage system is built, and the function design of each hardware module and the design of the software flow are introduced in detail. The experimental study on the transition from start-up to grid connection of doubly-fed pumped storage unit is completed.
【學(xué)位授予單位】：廣東工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TV743;TV734

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