基于DSP的逆變器并聯(lián)的設(shè)計(jì)
[Abstract]:In this era of energy scarcity, new energy has been paid more and more attention, among which solar energy is especially favored for its clean and inexhaustible advantages. But how to use this kind of energy effectively is the problem which has been puzzling human beings all the time, people have carried on a lot of research for this reason. With the emergence of power electronics technology, this problem has been solved. The inverter composed of power electronic devices is an important device to convert solar energy into human available energy. It uses photovoltaic panels to collect solar energy and converts them into usable alternating current using various boost and inverter circuits. But because of the increasing number of human power devices, more and more power supply capacity is needed to meet them. Parallel technology can effectively solve such problems. Multiple power sources can be connected to each other to supply power to the equipment. Each voltage un is loaded with load power on average. Moreover, the modular design is more flexible and can be expanded at any time or with less capacity. Use flexibility. Redundant power supply can be realized, and the reliability of the system is greatly improved. The parallel control strategy proposed in this paper has no analog connection between the parallel modules, so the control is simple and the effect of loop suppression is better. Firstly, the paper summarizes the background and development trend of solar photovoltaic power generation, the necessity of parallel technology development, the research status of inverter parallel control technology, and introduces several main control strategies and their existing problems. The current sharing solution of the inverter parallel system is presented. Secondly, the design of inverter circuit and modulation mode are discussed, and the model of parallel inverter is analyzed. Then the parallel principle of inverter is discussed, and the principle of loop generation is analyzed, and the droop method is used to control it. Here, I innovate the original droop control method and use more flexible improved droop control method. Then, because the main control chip of this system is DSP, the DSP2821 used in this paper is introduced in detail. Finally, the matlab simulation results show that the theoretical idea is feasible.
【學(xué)位授予單位】:南昌航空大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2014
【分類號】:TM464
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