微網(wǎng)系統(tǒng)超級(jí)電容儲(chǔ)能式APF的研究
文內(nèi)圖片:
圖片說明:圖2.1雙電層電容器結(jié)構(gòu)國逡逑Fig.邋2.1邋The邋structure邋diagram邋electric邋double邋layer邋capackors逡逑
[Abstract]:In recent years, people pay more and more attention to green energy and ecological environment. Microgrid, which can integrate solar energy, biological energy, wind energy and other renewable energy to generate electricity, emerges as the times require. It can save investment, reduce energy consumption, improve energy efficiency and meet the growing demand for electricity. However, the instantaneous power outage and voltage drop under the condition of microgrid will seriously affect the reliable operation of the power supply system. At the same time, there are still harmonics and reactive current caused by the application of a large number of nonlinear loads in the microgrid. Therefore, an active power filter (APF),) using supercapacitor as energy storage element is proposed in this paper, which can not only control harmonics and reactive current, but also solve the problems of short-term power outage and voltage sag, and can comprehensively improve the power quality of microgrid. In this paper, the basic characteristics, energy storage mechanism and ideal model of supercapacitors and the composition of supercapacitor energy storage system are introduced at first. Secondly, the topological structure of supercapacitor energy storage APF is established, and its working principle is expounded. Then the ip-iq method based on instantaneous reactive power theory is used to detect harmonics and reactive current. In the aspect of harmonic control, the hysteretic comparative control method is selected to track and control the harmonic current by comparing the advantages and disadvantages of various methods, and the APF using ip-iq detection method and hysteretic comparative control technology is simulated. In addition, the detection method and compensation process of voltage sag in microgrid are analyzed and simulated. Finally, a prototype of APF and a supercapacitor energy storage system based on TMS320F2812 high-speed digital signal processor and CPLD are designed. The hardware and software of the prototype are introduced in detail, and the preliminary experimental research is carried out. The results show that the device can effectively solve the power quality problems such as harmonics and voltage fluctuations.
【學(xué)位授予單位】:遼寧工程技術(shù)大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2014
【分類號(hào)】:TM53;TM761
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