本文關(guān)鍵詞：基于下垂控制的微電網(wǎng)運(yùn)行控制研究　出處：《安徽理工大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 微電網(wǎng) 下垂控制 功率分配 逆變器 虛擬阻抗

【摘要】：從人類的發(fā)展歷史來(lái)看,能源始終是人類文明發(fā)展的階梯,從早期的生物燃料,到后來(lái)煤炭石油等化石資源的應(yīng)用,能源與我們的生活息息相關(guān),可以說(shuō)人類科技的進(jìn)步離不開能源�；谙麓箍刂频奈㈦娋W(wǎng)在孤島運(yùn)行和并網(wǎng)時(shí)有很多優(yōu)勢(shì),它能更好的對(duì)微電源輸出的頻率和電壓進(jìn)行有效調(diào)節(jié),使微電網(wǎng)擁有更好的穩(wěn)定性,安全性,可靠性,并且不需要額外的通信手段。本文以傳統(tǒng)下垂控制方式為基礎(chǔ),通過(guò)建立dq中的數(shù)學(xué)模型,對(duì)其電流電壓環(huán)進(jìn)行分析,然后指出傳統(tǒng)下垂控制中,由于線路阻抗,會(huì)造成下垂傳統(tǒng)下垂不穩(wěn)定,產(chǎn)生環(huán)流等。為了改善微電源逆變器對(duì)線路的適應(yīng)性,對(duì)傳統(tǒng)下垂控制加入新型虛擬阻抗,該虛擬阻抗在低頻呈感性,能很好的適應(yīng)線路阻抗帶來(lái)的問(wèn)題。但是由于引入虛擬阻抗會(huì)對(duì)微電網(wǎng)的電壓造成一定的減小,為了彌補(bǔ)引入虛擬阻抗帶來(lái)的壓降,根據(jù)電力系統(tǒng)線路電壓降原理,引入電壓補(bǔ)償環(huán)節(jié)。然后在MATLAB中搭建加入虛擬阻抗和電壓補(bǔ)償?shù)南麓箍刂苾蓚�(gè)并聯(lián)的孤島模型和并網(wǎng)模型,驗(yàn)證了加入虛擬阻抗后能起到優(yōu)化功率分配,增加系統(tǒng)穩(wěn)定性,減少功率環(huán)流的作用。隨后基于DSP2812中對(duì)下垂控制主要部分的硬件和流程設(shè)計(jì)。
[Abstract]:From the history of human development, energy has always been the ladder of the development of human civilization. From the early biofuel to the later application of fossil resources such as coal oil, energy is closely related to our daily life. It can be said that the progress of human science and technology can not be separated from energy. Microgrid based on droop control has many advantages in island operation and grid connection, it can better adjust the frequency and voltage of micro-power output. The microgrid has better stability, security, reliability and no additional means of communication. Based on the traditional droop control method, the mathematical model of dq is established in this paper. The current and voltage loop is analyzed, and it is pointed out that in the traditional droop control, the traditional droop instability will be caused by the line impedance, and the circulation will be produced. In order to improve the adaptability of the micro-power inverter to the circuit. A new type of virtual impedance is added to the traditional droop control, which is inductive at low frequency, which can well adapt to the problems caused by line impedance. However, the introduction of virtual impedance will reduce the voltage of microgrid to a certain extent. In order to make up for the voltage drop caused by the introduction of virtual impedance, the principle of line voltage drop in power system is adopted. The voltage compensation link is introduced. Then the islanding model and grid-connected model of droop control with virtual impedance and voltage compensation are built in MATLAB. It is verified that virtual impedance can optimize power distribution, increase system stability and reduce power circulation. Then, the hardware and flow design of the main parts of droop control in DSP2812 is based on the design of hardware and flow chart.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM727

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