本文選題：微電網(wǎng) + 儲能單元��； 參考：《湖南工業(yè)大學(xué)》2014年碩士論文

【摘要】：微電網(wǎng)作為大型電網(wǎng)的有力補(bǔ)充，在電力系統(tǒng)中扮演著越來越重要的角色。但由于眾多非線性電力電子成員的加入，使微電網(wǎng)的電能質(zhì)量受到嚴(yán)重污染。在不增加成本的前提下，為解決微電網(wǎng)電能質(zhì)量問題，研究適用于微電網(wǎng)的儲能單元與APF組合裝置，實(shí)現(xiàn)“一機(jī)多能”。本文著重針對微電網(wǎng)儲能單元與APF組合裝置的原理及控制方法展開研究。 深入研究改善電網(wǎng)系統(tǒng)電能質(zhì)量的微電網(wǎng)儲能單元及APF的系統(tǒng)結(jié)構(gòu)及工作原理，對比分析兩者存在的諸多相似點(diǎn)，提出微電網(wǎng)儲能單元與APF組合裝置，進(jìn)一步提出二者組合系統(tǒng)的結(jié)構(gòu)設(shè)計(jì)方案。分析裝置諧波抑制、無功補(bǔ)償及UPS功能原理及裝置的工作模式，該裝置能在實(shí)現(xiàn)儲能單元并網(wǎng)調(diào)節(jié)微電網(wǎng)功率的同時(shí)，還可以發(fā)揮電能質(zhì)量調(diào)節(jié)的功能。 對組合裝置的控制方法進(jìn)行研究。建立DC-DC變換器數(shù)學(xué)模型，在傳統(tǒng)控制基礎(chǔ)上加入功率限制環(huán)節(jié)，確保儲能單元的穩(wěn)定運(yùn)行。建立DC-AC變換器數(shù)學(xué)模型，研究該變換器在并網(wǎng)模式和UPS模式兩種不同工作模式下的控制策略，提出并網(wǎng)模式下基于復(fù)合校正技術(shù)的改進(jìn)三角波比較控制方法，實(shí)現(xiàn)對DC-AC變換器的有效控制。研究組合裝置的電流指令合成方法及輸出電流限制方式。提出含前饋校正的直流母線電壓預(yù)測控制方法，實(shí)現(xiàn)對組合裝置直流母線電壓的有效控制。設(shè)計(jì)組合裝置的總控制器，，對鎖相環(huán)進(jìn)行設(shè)計(jì)，實(shí)現(xiàn)裝置的精確鎖相。在對系統(tǒng)控制方法研究的基礎(chǔ)上，設(shè)計(jì)基于DSP+FPGA系統(tǒng)的軟件設(shè)計(jì)流程圖。 為驗(yàn)證本文提出的組合裝置及控制方法的可行性及其運(yùn)行效果，進(jìn)行了詳細(xì)的仿真和實(shí)驗(yàn)研究。結(jié)果表明，本裝置不僅能夠?qū)崿F(xiàn)儲能單元并網(wǎng)調(diào)節(jié)微電網(wǎng)功率的功能，還可以發(fā)揮電能質(zhì)量調(diào)節(jié)的功能，為解決微電網(wǎng)電能質(zhì)量問題提供了一個(gè)新穎且成本較低的方法。
[Abstract]:As a powerful supplement of large power grid, microgrid plays a more and more important role in power system. However, the power quality of microgrid is seriously polluted by the addition of many nonlinear power electronic members. In order to solve the power quality problem of microgrid without increasing the cost, a combination of energy storage unit and APF for microgrid is studied to realize "one machine multi-power". In this paper, the principle and control method of microgrid energy storage unit combined with APF are studied, and the system structure and working principle of APF and micro-grid energy storage unit, which can improve the power quality of power system, are studied in detail. By comparing and analyzing the similarities between the two systems, an energy storage unit and an APF combination device are proposed, and the structural design scheme of the two combined systems is put forward. The harmonic suppression, reactive power compensation, UPS function principle and the working mode of the device are analyzed. The device can realize the power regulation of the microgrid while the energy storage unit is connected to the grid. The function of power quality regulation can also be brought into play. The control method of the combined device is studied. The mathematical model of DC-DC converter is established and the power limiting link is added on the basis of traditional control to ensure the stable operation of the energy storage unit. The mathematical model of DC-AC converter is established, and the control strategy of the converter in grid-connected mode and UPS mode is studied. An improved triangular wave comparison control method based on composite correction technique is proposed in grid-connected mode. The effective control of DC-AC converter is realized. The current command synthesis method and output current limiting mode of the combined device are studied. A predictive control method for DC bus voltage with feedforward correction is proposed to realize the effective control of DC bus voltage of the combined device. The main controller of the combined device is designed and the phase locked loop is designed to realize the precise phase lock of the device. Based on the research of system control method, the software design flow chart based on DSP FPGA system is designed. In order to verify the feasibility and operation effect of the combined device and control method proposed in this paper, the detailed simulation and experimental research are carried out. The results show that this device can not only realize the function of energy storage unit connected to grid to adjust the power of microgrid, but also can play the function of power quality regulation. It provides a novel and low cost method for solving the problem of power quality of microgrid.
【學(xué)位授予單位】：湖南工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM73

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