本文選題：微電網(wǎng) + 微電源逆變器�。� 參考：《燕山大學(xué)》2016年碩士論文

【摘要】：當(dāng)前,常規(guī)能源短缺、環(huán)境保護(hù)和電力需求增長給可再生能源分布式發(fā)電相關(guān)的技術(shù)發(fā)展帶來了機(jī)遇。微電網(wǎng)可以綜合各種分布式電源,對其進(jìn)行協(xié)調(diào)控制,并可以運(yùn)行在獨(dú)立和并網(wǎng)兩種模式。微電網(wǎng)能夠有效解決大量分布式電源接入而產(chǎn)生的諸多問題,充分利用分布式發(fā)電的優(yōu)勢,提高電能質(zhì)量和供電可靠性。微電網(wǎng)中的各類微電源和儲能裝置通常通過電力電子器件組成的逆變器連接到網(wǎng)絡(luò),因此微電源逆變器的控制策略的研究對微電網(wǎng)安全穩(wěn)定具有重要意義。本文以微電網(wǎng)中微電源逆變器為研究對象,對其運(yùn)行及控制策略進(jìn)行了深入研究。首先,闡述微電網(wǎng)并網(wǎng)運(yùn)行和孤島運(yùn)行兩種模式,并分析了恒功率控制、恒壓恒頻控制、下垂控制的基本原理。其次,基于三相微電源逆變系統(tǒng)的拓?fù)浣Y(jié)構(gòu),建立數(shù)學(xué)模型,并研究設(shè)計(jì)微電源逆變器下垂控制系統(tǒng)。該控制系統(tǒng)采用基于模糊PI控制器的電壓電流雙閉環(huán)控制方案,大大提升了對微電網(wǎng)的控制效果。最后,基于單相微電源并網(wǎng)逆變系統(tǒng),考慮系統(tǒng)模型存在的不確定因素和干擾項(xiàng),研究提出了H∞魯棒控制策略,并運(yùn)用LMI的方法設(shè)計(jì)并求解控制器,使微電網(wǎng)不僅能夠穩(wěn)定運(yùn)行,同時有很好的干擾抑制能力。最后,搭建Matlab/Simulink仿真模型對理論方法進(jìn)行了仿真驗(yàn)證。
[Abstract]:At present, the shortage of conventional energy, environmental protection and the growth of electricity demand bring opportunities for the development of renewable energy distributed power generation technology. Microgrid can integrate various distributed power sources, coordinate and control them, and can run in two modes: independent and grid-connected. Microgrid can effectively solve many problems caused by the access of a large number of distributed power sources, make full use of the advantages of distributed generation, and improve the power quality and power supply reliability. All kinds of micro-power and energy storage devices in microgrid are usually connected to the network by inverter composed of power electronic devices. Therefore, the study of control strategy of micro-power inverter is of great significance to the safety and stability of micro-grid. In this paper, the operation and control strategy of micro-power inverter in microgrid is studied. Firstly, the two modes of microgrid grid-connected operation and islanding operation are described, and the basic principles of constant power control, constant voltage and frequency control and droop control are analyzed. Secondly, based on the topology of three-phase micro-power inverter system, the mathematical model is established, and the droop control system of micro-power inverter is designed. The control system adopts the double closed loop control scheme of voltage and current based on fuzzy Pi controller, which greatly improves the control effect of microgrid. Finally, based on the single-phase micro-power grid-connected inverter system, considering the uncertainties and disturbances in the system model, the H _ 鈭，

本文編號：1891999