發(fā)布時間：2018-04-22 06:10

  本文選題：光伏 + 非隔離逆變器��； 參考：《北京交通大學(xué)》2015年碩士論文

【摘要】：能源危機的日漸加重以及化石能源對環(huán)境的污染,都在不斷促使著新能源發(fā)電技術(shù)的進步。其中,光伏發(fā)電因為儲量大、無污染等優(yōu)勢得以被越來越多地推廣與應(yīng)用。分布式微網(wǎng)的快速發(fā)展以及我國諸多偏遠地區(qū)輸電困難等因素,也為我國光伏發(fā)電事業(yè)帶來了美好的前景。 本文對小功率家用光伏發(fā)電儲能系統(tǒng)進行了研究與設(shè)計。該系統(tǒng)集升壓控制、逆變、儲能等部分于一體,便于安裝、使用,擁有較好的商業(yè)前景。文中首先對本系統(tǒng)所采用的Boost升壓電路、全橋逆變電路以及儲能電路的工作原理進行了分析,并詳細介紹了逆變電路中的SPWM調(diào)制方式。由于采用了非隔離拓撲,系統(tǒng)在并網(wǎng)工作模式下,會產(chǎn)生嚴重的漏電流,文中對漏電流的產(chǎn)生和抑制原理進行了解釋和說明,決定采用加入共模濾波器的方式來抑制漏電流,并通過仿真驗證了該設(shè)計的可行性。本文對系統(tǒng)的閉環(huán)設(shè)計、光伏電池的特性、MPPT的實現(xiàn)、儲能環(huán)節(jié)的充電方案都進行了研究與設(shè)計,采用了變步長電導(dǎo)增量MPPT法和三段式充電控制方式對系統(tǒng)進行控制。 在本文理論研究基礎(chǔ)上設(shè)計了5kW小功率家用光伏發(fā)電儲能系統(tǒng)樣機。文中采用IGBT和MOSFET作為開關(guān)器件的選擇,對電感、電容等元件參數(shù)進行了詳細地設(shè)計,并針對系統(tǒng)需求,設(shè)計了相應(yīng)的采樣調(diào)理和保護電路。最后介紹了控制芯片TMS320F28335的外圍設(shè)計和端口分配。 本文最后對該系統(tǒng)進行了仿真和實驗,驗證了所用拓撲及調(diào)制方式的高效性,測試最高效率可達94.4%。仿真中就MPPT算法對整個光伏系統(tǒng)的可行性也進行了驗證,穩(wěn)態(tài)跟蹤效率保持在99%以上,能最大限度地利用電池板的功率。本文對雙向儲能電路也進行了仿真,驗證了該電路的可行性。
[Abstract]:The worsening energy crisis and the pollution of fossil energy to the environment are promoting the progress of new energy generation technology. Among them, photovoltaic power generation has been more and more widely used because of its large reserves and no pollution. The rapid development of distributed microgrid and the difficulties of transmission in many remote areas in China also bring a bright prospect for photovoltaic power generation in China. In this paper, the energy storage system of low-power household photovoltaic power generation is studied and designed. The system integrates booster control, inverter, energy storage and so on. It is easy to install and use, and has a good commercial prospect. In this paper, the working principle of Boost boost circuit, full-bridge inverter circuit and energy storage circuit used in the system are analyzed, and the SPWM modulation mode in the inverter circuit is introduced in detail. Due to the use of non-isolated topology, the system will produce serious leakage current in grid-connected operation mode. The principle of leakage current generation and suppression is explained and explained in this paper, and the common mode filter is adopted to suppress leakage current. The feasibility of the design is verified by simulation. In this paper, the closed-loop design of the system, the characteristic of photovoltaic cell and the realization of MPPT, the charging scheme of energy storage link are studied and designed. The variable step conductance increment MPPT method and the three-stage charging control method are used to control the system. Based on the theoretical research in this paper, the prototype of 5kW small power household photovoltaic energy storage system is designed. In this paper, IGBT and MOSFET are used as switching devices to design the inductance and capacitance in detail, and the corresponding sampling conditioning and protection circuits are designed according to the system requirements. Finally, the peripheral design and port allocation of TMS320F28335 are introduced. Finally, the simulation and experiment of the system are carried out, and the efficiency of the topology and modulation is verified. The highest efficiency of the test can be up to 94. 4%. In the simulation, the feasibility of the whole photovoltaic system is verified by MPPT algorithm. The steady-state tracking efficiency is over 99%, and the power of the battery panel can be used to the maximum extent. In this paper, the two-way energy storage circuit is also simulated to verify the feasibility of the circuit.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TM615

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本文編號：1785937