發(fā)布時(shí)間：2018-07-05 08:09

  本文選題：光伏并網(wǎng)發(fā)電 + 重復(fù)控制��； 參考：《湘潭大學(xué)》2014年碩士論文

【摘要】：在傳統(tǒng)能源日漸枯竭的今天，作為被大力提倡的綠色能源之一，太陽能光伏發(fā)電的機(jī)遇與挑戰(zhàn)并存�；趦�(nèi)模原理的重復(fù)控制，通過在控制反饋閉環(huán)過程中加入外部激勵(lì)周期性信號的產(chǎn)生模型，該模型能夠?qū)χ芷谛盘栠M(jìn)行零穩(wěn)態(tài)誤差跟蹤抑制。本文通過理論分析太陽能光伏并網(wǎng)系統(tǒng)系的逆變器傳統(tǒng)控制策略，指出其所存在的不足，并在這一基礎(chǔ)上引入太陽能光伏并網(wǎng)逆變器的重復(fù)控制方法。 首先通過分析數(shù)種太陽能光伏并網(wǎng)逆變器拓?fù)浣Y(jié)構(gòu)，建立了PI雙環(huán)控制，輸出反饋，狀態(tài)觀測器等太陽能光伏并網(wǎng)逆變重復(fù)控制器結(jié)構(gòu)，，并依次構(gòu)建其物理模型。并在這一過程中，從坐標(biāo)變換的角度，證明了傳統(tǒng)PI控制策略無法無靜差跟蹤周期信號的本質(zhì)，同時(shí)論述了并網(wǎng)逆變器在光伏系統(tǒng)中的重要性和獨(dú)立性。 接著從頻域分析基于雙環(huán)太陽能光伏并網(wǎng)逆變重復(fù)控制器的物理模型，計(jì)算獲得其開閉環(huán)傳遞函數(shù)，建立其H模型，通過matlab工具箱hinfsyn求解其待定參數(shù)，在此基礎(chǔ)上建立matlab數(shù)值仿真模型，分析設(shè)計(jì)雙環(huán)太陽能光伏并網(wǎng)逆變重復(fù)控制器的可行性。 對于基于狀態(tài)觀測器的太陽能光伏并網(wǎng)逆變重復(fù)控制器物理模型，本文通過理論推導(dǎo)，重構(gòu)狀態(tài)空間方程，將其轉(zhuǎn)化為離散二維模型。然后構(gòu)建其李雅普諾夫泛函，并證明該李雅普諾夫泛函的保守性，給出了狀態(tài)觀測器參數(shù)的線性矩陣不等式(LMI)求解方法，在此基礎(chǔ)上，搭建了matlab數(shù)學(xué)仿真模型，最后采用基于Concerto微處理器的太陽能光伏并網(wǎng)實(shí)驗(yàn)平臺驗(yàn)證該方法的實(shí)用性。 對于基于輸出反饋的太陽能光伏并網(wǎng)逆變重復(fù)控制器，本文從線性矩陣不等式(LMI)的角度，進(jìn)行理論推導(dǎo)，得到該太陽能光伏并網(wǎng)逆變重復(fù)控制器的H2/H混合多目的魯棒穩(wěn)定條件。在數(shù)值求解過程中，應(yīng)用了matlab的多種軟件工具箱，有效地簡化了計(jì)算求解過程，并通過數(shù)值仿真驗(yàn)證了該設(shè)計(jì)控制方法具有穩(wěn)定性好，諧波含量低，收斂速度快等優(yōu)點(diǎn)。 本文對于數(shù)種太陽能光伏并網(wǎng)逆變重復(fù)控制器，采用了不同的理論分析手段和策略，如頻域分析，開閉環(huán)傳遞函數(shù)，線性矩陣不等式(linear matrix inequalities,LMI)，并結(jié)合現(xiàn)代控制理論中的李雅普諾夫方法，魯棒控制理論，最后通過多個(gè)數(shù)值仿真及實(shí)物實(shí)驗(yàn)驗(yàn)證了所設(shè)計(jì)方法的可行性，為在應(yīng)用領(lǐng)域的重復(fù)控制器的設(shè)計(jì)提供了設(shè)計(jì)思路和一定的參考價(jià)值。
[Abstract]:As one of the green energy sources, the opportunities and challenges of solar photovoltaic power generation coexist. Based on the repetitive control of internal model principle, by adding the generation model of external excitation periodic signal in the closed-loop process of control feedback, the model can suppress the zero steady-state error tracking of the periodic signal. Based on the theoretical analysis of the traditional inverter control strategy of solar photovoltaic grid-connected system, the shortcomings of the inverter are pointed out, and the repetitive control method of solar photovoltaic grid-connected inverter is introduced on this basis. Firstly, by analyzing the topology of several solar photovoltaic grid-connected inverters, Pi double-loop control, output feedback, state observer and other solar photovoltaic grid-connected inverter repetitive controller structures are established, and their physical models are constructed in turn. In this process, from the point of view of coordinate transformation, it is proved that the traditional Pi control strategy can not track the nature of periodic signal without static error, and the importance and independence of grid-connected inverter in photovoltaic system are discussed. Then the physical model based on double-loop solar photovoltaic grid-connected repetitive controller is analyzed in frequency domain. The open and closed loop transfer function is obtained and its H model is established. The undetermined parameters are solved by hinfsyn of matlab toolbox. On this basis, the matlab numerical simulation model is established, and the feasibility of designing double ring solar photovoltaic grid-connected inverter repetitive controller is analyzed. For the physical model of solar photovoltaic grid-connected repetitive controller based on state observer, this paper reconstructs the state space equation by theoretical derivation and transforms it into discrete two-dimensional model. Then the Lyapunov functional is constructed, and the conservatism of the Lyapunov functional is proved. The linear matrix inequality (LMI) solution method for the parameters of the state observer is given. On this basis, the matlab mathematical simulation model is built. Finally, a solar photovoltaic grid-connected experimental platform based on Concerto microprocessor is used to verify the practicability of the method. For the solar photovoltaic grid-connected inverter repetitive controller based on output feedback, the H _ 2 / H hybrid multi-purpose robust stability condition of the solar photovoltaic grid-connected repetitive controller is derived theoretically from the point of view of linear matrix inequality (LMI). In the process of numerical solution, several software toolboxes of matlab are used to simplify the calculation process effectively. The numerical simulation shows that the design control method has the advantages of good stability, low harmonic content and fast convergence speed. In this paper, several kinds of solar photovoltaic grid-connected inverter repetitive controllers are analyzed by different theoretical methods and strategies, such as frequency-domain analysis, open-closed-loop transfer function. Linear matrix inequality (LMI), combined with Lyapunov method and robust control theory in modern control theory, the feasibility of the proposed method is verified by several numerical simulations and physical experiments. It provides the design idea and certain reference value for the design of repetitive controller in application field.
【學(xué)位授予單位】：湘潭大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM464

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