DC-DC變換器的級聯(lián)穩(wěn)定性分析與改善
[Abstract]:Distributed power supply system is more and more used as spacecraft power supply system because of its many advantages. In the distributed power supply system, there are many subsystems cascade parts, which will affect the dynamic performance and stability of the whole system. Based on the above problems, this paper will analyze the stability of the DC-DC converter cascade system. At the same time, the stability of the cascade system of DC-DC converter is improved. In view of the analysis of cascade stability of unobstructed filter and converter, this paper gives the basis of cascade instability from the point of view of baud diagram, Naiquist criterion and impedance matching, respectively, by establishing a small signal model. The stability of the actual cascade circuit is analyzed, and the corresponding experimental verification is given. on this basis, the critical conditions of the cascade stability of the unobstructed filter and the converter are verified and analyzed by using the actual experiment. In order to explain the correctness of this critical condition. In order to solve the problem of instability after cascade of undamped filter and converter, this paper uses the method of designing damping filter to solve this problem. Firstly, the advantages and disadvantages of damping filter with different structures are analyzed. Therefore, the damping filter can be selected according to different needs, and then the design principles and steps of damping filter with different structures are given. finally, the simulation and experimental results are given to verify the correctness of the design idea. At the same time, the influence of damping on the transfer function and output impedance of the filter is analyzed, and the corresponding conclusions are given. For the stability analysis of the cascade of the two converters, the stability of the cascade of the two converters is analyzed from different angles by using the small signal model established above. At the same time, the low frequency oscillations produced by the cascade of the two converters are studied. Based on the equivalent load switching principle, the back stage converter is equivalent to the load switching of the front stage converter, and the causes and laws of the low frequency oscillation after concatenation of the two converters are analyzed, and the influence of load on the low frequency oscillation is studied at the same time. This part not only gives the theoretical analysis, but also gives the experimental waveform to prove the correctness of the theoretical analysis. For the low frequency oscillation or other unstable problems caused by concatenation of two converters, this paper mainly uses the principle of impedance matching to ensure that the performance of the latter converter is not affected by the front converter to design the intermediate cascade filter. In this paper, on the basis of the previous method, the corresponding improvement is made to make the impedance difference between the two ports larger, so as to better meet the impedance matching. The specific design steps of the single-stage intermediate filter are given in this paper. At the same time, the simulation and experimental results are given to verify the correctness of the design idea. Finally, the influence of damping on the performance of the filter is studied, and the corresponding conclusions are given. The research of this paper provides a theoretical basis for cascade stability analysis and a reference solution for improving the engineering application of cascade instability.
【學(xué)位授予單位】:哈爾濱工業(yè)大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2014
【分類號】:TM46
【相似文獻】
相關(guān)期刊論文 前10條
1 李建泉;馮曉云;;中低速磁懸浮列車DC-DC變換器的研制[J];大功率變流技術(shù);2009年04期
2 肖永濤;朱理;;全數(shù)字化DC-DC變換器在電鍍電源中的應(yīng)用[J];電源技術(shù)應(yīng)用;2011年02期
3 湯自春;周紅雨;;DC-DC變換器電流電壓雙閉環(huán)控制系統(tǒng)應(yīng)用分析[J];科技資訊;2007年35期
4 蔣玉萍;;一種簡易型多路輸出DC-DC變換器[J];電源世界;2001年09期
5 杜春水;張承慧;陳阿蓮;趙方德;肖維榮;;光伏高效軟開關(guān)DC-DC變換器的數(shù)字化控制與實現(xiàn)[J];電工技術(shù)學(xué)報;2011年08期
6 劉健,程紅麗,王兆安;采用變結(jié)構(gòu)控制改善DC-DC變換器的性能[J];西安交通大學(xué)學(xué)報;2000年08期
7 邵丹;;等離子(PDP)彩電DC-DC變換器快修筆記[J];家電檢修技術(shù);2010年09期
8 張雪圓;張維戈;李景新;路其龍;;低壓大電流DC-DC變換器原理分析[J];電源技術(shù);2012年04期
9 蔡宣三;;開關(guān)電源主電路基本拓?fù)涞难葑?Ⅰ) DC-DC變換器理論早期的歷史回顧[J];電力電子;2003年02期
10 林良銳;張衛(wèi)平;;諧振式DC-DC變換器的無死區(qū)分析[J];電源世界;2007年06期
相關(guān)會議論文 前1條
1 樊立萍;姜龍;;DC-DC變換器模糊滑?刂凭C述[A];第八屆全國信息獲取與處理學(xué)術(shù)會議論文集[C];2010年
相關(guān)博士學(xué)位論文 前3條
1 沙廣林;電力電子變壓器中雙有源橋DC-DC變換器的研究[D];中國礦業(yè)大學(xué)(北京);2016年
2 王紅義;基于PVTL變化的集成電流模DC-DC變換器穩(wěn)定性研究[D];西安電子科技大學(xué);2007年
3 姚雨迎;航天器多路精確穩(wěn)壓DC-DC變換器數(shù)字控制研究[D];哈爾濱工業(yè)大學(xué);2009年
相關(guān)碩士學(xué)位論文 前10條
1 谷嶺;車載超級電容能量緩沖系統(tǒng)中DC-DC變換器設(shè)計[D];燕山大學(xué);2015年
2 周楚;基于DSP的數(shù)字PID控制DC-DC變換器的設(shè)計[D];華中師范大學(xué);2015年
3 楊云;適用于低噪聲供電的DC-DC變換器設(shè)計[D];電子科技大學(xué);2015年
4 況祖杭;雙向半橋三電平DC-DC變換器拓?fù)浣Y(jié)構(gòu)及控制策略研究[D];西南交通大學(xué);2016年
5 楊東杰;低噪聲DC-DC變換器的研究與設(shè)計[D];電子科技大學(xué);2016年
6 O@東方;DC-DC變換器的級聯(lián)穩(wěn)定性分析與改善[D];哈爾濱工業(yè)大學(xué);2014年
7 賈淑文;智能并聯(lián)均流的DC-DC變換器研究[D];西安科技大學(xué);2011年
8 劉洋;蓄電池充放電數(shù)字DC-DC變換器的研制[D];哈爾濱工業(yè)大學(xué);2010年
9 葉飛;DC-DC變換器并聯(lián)運行的研究[D];上海交通大學(xué);2012年
10 李建泉;中低速磁浮列車DC-DC變換器研制[D];西南交通大學(xué);2011年
本文編號:2494196
本文鏈接:http://sikaile.net/kejilunwen/dianlilw/2494196.html