發(fā)布時間：2018-06-14 21:59

  本文選題：微型逆變器 + 微型變換器�。� 參考：《南京航空航天大學》2014年碩士論文

【摘要】：光伏并網發(fā)電裝置和儲能裝置是新能源發(fā)電系統(tǒng)的重要組成部分。由于不同光伏組件，不同儲能裝置之間的差異性，傳統(tǒng)的集中式光伏發(fā)電架構和集中式儲能架構在可靠性以及系統(tǒng)能源利用率等方面存在重要缺陷。為解決該問題，分布式光伏發(fā)電架構與分布式儲能架構應運而生。微型逆變器和微型變換器在分布式新能源發(fā)電系統(tǒng)中得到了廣泛運用。 本文首先介紹了微型逆變器的特點以及優(yōu)勢。對交錯反激光伏并網微型逆變器的常用控制策略：電流臨界連續(xù)和電流斷續(xù)工作模式進行了損耗分析，指出針對200W交錯反激光伏并網微型逆變器，電流斷續(xù)工作模式更為有效。在此基礎上，針對電流斷續(xù)工作模式(DiscontinousConduction Mode, DCM)的損耗進行了詳細分析，提出一種在半個工頻周內采用一相DCM和兩相DCM混合調制的控制策略。所提混合調制策略可以根據負載情況不同，降低變換器的主導損耗，優(yōu)化變換器效率。為驗證理論分析的正確性，在實驗室搭建了一臺200W的交錯反激光伏并網微型逆變器，并給出了詳細的實驗結果和分析。 本文分析了傳統(tǒng)移相控制和三角波控制時雙有源全橋雙向DC-DC變換器的工作特性并進行了對比，指出采用傳統(tǒng)移相控制和三角波控制混合調制可以使變換器在全負載范圍實現高效率。在此基礎上，本文對三角波控制時雙有源全橋雙向DC-DC變換器的損耗分析進行了詳細分析，提出一種變頻混合調制策略；輕載時，采用變頻三角波控制方式；重載時，采用定頻傳統(tǒng)移相控制方式。所提變頻混合調制策略根據不同負載情況下主導損耗不同，，采用不同控制策略，降低變換器總損耗，提高變換器效率。為驗證理論分析的正確性，研制了一臺12V輸入、380V輸出的500W的雙有源全橋雙向變換器，并進行了實驗驗證。實驗結果驗證了所提變頻混合調制策略相比于傳統(tǒng)移相控制策略的優(yōu)勢。
[Abstract]:Photovoltaic grid-connected power plant and energy storage device are important components of new energy generation system. Because of the difference between different PV modules and energy storage devices, the traditional centralized photovoltaic power generation architecture and centralized energy storage architecture have important defects in reliability and energy efficiency of the system. In order to solve this problem, distributed photovoltaic generation architecture and distributed energy storage architecture emerged as the times require. Micro-inverters and micro-converters are widely used in distributed new energy generation systems. This paper first introduces the characteristics and advantages of miniature inverter. The current critical continuous mode and current intermittent mode are used to analyze the common control strategies of the interleaved inverter. It is pointed out that the current intermittent mode is more effective for the 200W interleaved laser grid-connected miniature inverter. On this basis, the loss of discontinuous production mode (DCMs) is analyzed in detail, and a control strategy using one-phase DCM and two-phase DCM mixed modulation in half frequency cycle is proposed. The proposed hybrid modulation strategy can reduce the dominant loss of the converter and optimize the efficiency of the converter according to the different load conditions. In order to verify the correctness of the theoretical analysis, a 200W interleaved inverse laser volt grid-connected miniature inverter is built in the laboratory, and the detailed experimental results and analysis are given. In this paper, the operating characteristics of dual active full-bridge bi-directional DC-DC converters with traditional phase-shifting control and triangular wave control are analyzed and compared. It is pointed out that the traditional phase-shift control and triangular wave control hybrid modulation can achieve high efficiency in the full load range. On this basis, the loss analysis of dual-active full-bridge bi-directional DC-DC converter under triangle wave control is analyzed in detail, and a frequency conversion hybrid modulation strategy is proposed. Adopt constant frequency traditional phase shift control mode. According to the different dominant loss under different loads, the proposed hybrid modulation strategy uses different control strategies to reduce the total loss of the converter and improve the efficiency of the converter. In order to verify the correctness of the theoretical analysis, a 500W dual-active full-bridge bidirectional converter with 12V input and 380V output is developed and verified experimentally. The experimental results show that the proposed hybrid modulation strategy is superior to the traditional phase shift control strategy.
【學位授予單位】：南京航空航天大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM46;TM615

【參考文獻】

相關博士學位論文 前1條

1 譚光慧;太陽能交流模塊逆變器及其控制技術的研究[D];哈爾濱工業(yè)大學;2009年

本文編號：2019091