20KW的儲能功率變換系統(tǒng)
本文選題:微電網(wǎng) + SVPWM。 參考:《安徽工程大學(xué)》2017年碩士論文
【摘要】:面對日益嚴(yán)峻的環(huán)境問題和能源短缺危機,全球各國學(xué)者正在積極尋求新型可再生能源用來替代傳統(tǒng)的化石能源。太陽能以及風(fēng)能因其分布面廣,易于獲取而且清潔無污染,被越來越多的人們重視。由這些新型分布式電源、儲能系統(tǒng)以及負(fù)載組成的智能微電網(wǎng)系統(tǒng)減輕了大電網(wǎng)供電的壓力,因此微電網(wǎng)的發(fā)展顯示出極高的實用意義。儲能功率變換系統(tǒng)作為分布式電源與大電網(wǎng)之間的重要接口,在微電網(wǎng)系統(tǒng)中起到了關(guān)鍵性的作用,而儲能變換系統(tǒng)所采用的控制策略是其核心技術(shù),對微電網(wǎng)系統(tǒng)的輸出電能質(zhì)量和電壓電流的控制有著重要的影響。本文以學(xué)校110KW光伏微網(wǎng)系統(tǒng)為研究平臺,設(shè)計并搭建了一個20KW的儲能功率變換系統(tǒng)平臺。本文主要開展了以下幾個方面的研究工作。首先介紹了新型微電網(wǎng)的發(fā)展?fàn)顩r以及儲能系統(tǒng)的種類及作用,其次,重點分析了儲能功率變換器的類型、拓?fù)浣Y(jié)構(gòu)以及基本工作原理,并提出了總體的結(jié)構(gòu)設(shè)計框架,分別介紹各個模塊的功能,又分析它們的選型和參數(shù)設(shè)計,其中包括逆變電路、LC濾波模塊、IGBT驅(qū)動電路、電壓電流采樣模塊,并以DSP2812為控制芯片設(shè)計了主控電路及其外圍電路,還對一些重要的元器件的參數(shù)選型提供了計算的依據(jù)和方法,同時對關(guān)鍵的電路圖也給出了相應(yīng)的設(shè)計。再次,對處理器芯片DSP2812相應(yīng)的引腳進行配置,對SVPWM調(diào)制技術(shù)原理進行了深入的分析和研究,對比SPWM調(diào)制方法驗證了該調(diào)制方法的優(yōu)越性,并采用離網(wǎng)下的VF控制策略和并網(wǎng)下的PQ控制策略,對儲能功率變換系統(tǒng)的軟件進行了設(shè)計,主要包括對DSP2812程序的初始化、電壓電流采樣程序、數(shù)據(jù)計算程序、PWM程序、功率保護程序、PI控制程序的設(shè)計。最后完成了儲能功率變換系統(tǒng)的獨立測試并記錄各項指標(biāo)性能,并對系統(tǒng)的實驗波形進行了分析,驗證了本文的理論分析。
[Abstract]:Facing the increasingly severe environmental problems and the crisis of energy shortage, scholars all over the world are actively seeking new renewable energy to replace the traditional fossil energy. Solar and wind energy have attracted more and more attention because of their wide distribution, easy access and clean and pollution-free. The smart microgrid system composed of these new distributed generation, energy storage system and load reduces the pressure of power supply in large power grid, so the development of microgrid has high practical significance. As an important interface between distributed generation and large power grid, the energy storage power conversion system plays a key role in the microgrid system, and the control strategy used in the energy storage conversion system is its core technology. It has an important influence on the output power quality and voltage and current control of microgrid system. Based on school 110KW photovoltaic microgrid system, an energy storage power conversion system platform of 20KW is designed and built in this paper. This paper mainly carried out the following aspects of research work. Firstly, the development of the new microgrid and the types and functions of the energy storage system are introduced. Secondly, the type, topology and basic working principle of the energy storage power converter are analyzed, and the overall structure design framework is proposed. The functions of each module are introduced, and their selection and parameter design are analyzed, including inverter circuit, LC filter module, voltage and current sampling module. The main control circuit and its peripheral circuit are designed with DSP2812 as the control chip. It also provides the basis and method for the parameter selection of some important components, and also gives the corresponding design for the key circuit diagram. Thirdly, the DSP2812 pin of processor chip is configured, the principle of SVPWM modulation technology is deeply analyzed and studied, and the superiority of this modulation method is verified by comparing the SPWM modulation method. Using the off-grid VF control strategy and the PQ control strategy, the software of the energy storage power conversion system is designed, including initialization of the DSP2812 program, voltage and current sampling program, and data calculation program. Power protection program Pi control program design. Finally, the independent test of the energy storage power conversion system is completed and the performance of each index is recorded. The experimental waveforms of the system are analyzed, and the theoretical analysis of this paper is verified.
【學(xué)位授予單位】:安徽工程大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:TM46;TM727
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