基于模塊化多電平結(jié)構(gòu)的高壓大功率DC-DC變換器拓?fù)溲芯?/H1>
發(fā)布時間：2018-02-08 22:31
本文關(guān)鍵詞： DC-DC變換器 新型拓?fù)浣Y(jié)構(gòu) MMC-HVDC 海上風(fēng)電場 LCC-HVDC 出處：《華北電力大學(xué)(北京)》2014年碩士論文 論文類型：學(xué)位論文
【摘要】：隨著直流電網(wǎng)概念的提出,大容量新型直流輸電裝備成為了研究熱點(diǎn)。DC-DC變換器是直流電網(wǎng)的重要組成部分,一般直流電網(wǎng)中使用的變換器電壓等級較高,而現(xiàn)有的高壓直流變換器技術(shù)不夠成熟,因此急切需要一種可應(yīng)用于高壓大功率場合的DC-DC變換器。基于模塊化多電平(Modular Multilevel Converter,MMC)拓?fù)浣Y(jié)構(gòu),提出了一種可應(yīng)用于未來直流電網(wǎng)的模塊化多電平DC-DC變換器。論文首先介紹了研究學(xué)者在過去幾十年時間里所提出的高壓大功率DC-DC變換器拓?fù)?總結(jié)現(xiàn)有高壓大功率變換的解決思路和方法,包括功率器件的串并聯(lián)技術(shù)、多電平技術(shù)、變換器子模塊的串并聯(lián)技術(shù)等。介紹基于這三種技術(shù)的高壓大功率DC-DC變換器拓?fù)浣Y(jié)構(gòu),工作原理以及不同拓?fù)涞膬?yōu)缺點(diǎn)。其次,提出了一種單向降壓型DC-DC變換器,闡述了 DC-DC變換器拓?fù)浣Y(jié)構(gòu)、工作原理,對比子模塊串并聯(lián)技術(shù)介紹了該DC-DC變換器的優(yōu)勢。PSCAD/EMTDC環(huán)境下的仿真實(shí)驗(yàn)表明新型DC-DC變換器可以很好地實(shí)現(xiàn)直流變壓功能,開關(guān)頻率低且損耗小,直流電壓電流波形理想。在此基礎(chǔ)上,提出一種雙向DC-DC變換器,該變換器可實(shí)現(xiàn)功率的雙向流動。介紹了雙向變換器的拓?fù)浣Y(jié)構(gòu)和工作原理,針對變換器的功率傳輸能力,提出了兩相DC-DC變換器和多相DC-DC變換器,以適應(yīng)大功率場合,并通過仿真驗(yàn)證了兩相DC-DC變換器可以很好地實(shí)現(xiàn)直流變壓功能,且電壓電流波形理想。最后提出單向DC-DC變換器的和雙向DC-DC變換器的控制策略,仿真驗(yàn)證控制策略的可行性與可靠性。在所提拓?fù)浣Y(jié)構(gòu)的基礎(chǔ)上,分析DC-DC變換器的應(yīng)用前景,如海上風(fēng)電場的直流互聯(lián),VSC(Voltage Source Converter)與LCC(Line Commutated Converter)的互聯(lián),多終端高壓直流輸電系統(tǒng)給遠(yuǎn)程負(fù)荷供電等。這些應(yīng)用前景表明了 DC-DC變換器在未來直流電網(wǎng)建設(shè)中一定會擔(dān)當(dāng)起舉足輕重的角色。
[Abstract]:With the introduction of DC network concept, large capacity new DC transmission equipment has become a research hotspot. DC-DC converter is an important part of DC network. However, the existing high voltage DC / DC converter technology is not mature enough, so it is urgent to have a kind of DC-DC converter which can be used in high voltage and high power situation. Based on the modularized multilevel Modular Multilevel converter (MMC) topology, A modularized multilevel DC-DC converter for future DC networks is proposed. Firstly, the topology of high voltage and high power DC-DC converters proposed by researchers in the past decades is introduced. This paper summarizes the existing ideas and methods of high-voltage high-power conversion, including series-parallel technology of power device, multi-level technology, series-parallel technology of converter submodule, etc. The topology structure of high-voltage and high-power DC-DC converter based on these three technologies is introduced. The working principle and the advantages and disadvantages of different topologies. Secondly, a unidirectional step-down DC-DC converter is proposed, and the topology and working principle of the DC-DC converter are described. In this paper, the advantages of the DC-DC converter are introduced by comparing submodule series-parallel technology. The simulation results show that the new DC-DC converter can achieve the DC voltage function well, and the switching frequency is low and the loss is low. Based on the ideal waveform of DC voltage and current, a bidirectional DC-DC converter is proposed, which can realize the bidirectional flow of power. The topology and working principle of the converter are introduced, and the power transmission ability of the converter is discussed. A two-phase DC-DC converter and a multi-phase DC-DC converter are proposed to adapt to the high power situation. The simulation results show that the two-phase DC-DC converter can achieve the DC voltage function well. Finally, the control strategies of unidirectional DC-DC converters and bi-directional DC-DC converters are proposed, and the feasibility and reliability of the control strategies are verified by simulation. Based on the proposed topology, the application prospects of DC-DC converters are analyzed. For example, the direct current interconnection of offshore wind farms, the interconnection of VSC Commutated converters and LCC(Line Commutated converters, The applications of multi-terminal HVDC power supply system to remote load show that DC-DC converters will play an important role in the construction of DC power network in the future.
【學(xué)位授予單位】：華北電力大學(xué)(北京)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM46
【相似文獻(xiàn)】
相關(guān)期刊論文 前10條
1 馬小亮;;多電平電壓型變頻器(下)[J];變頻器世界;2011年11期
2 葉劍鋒;鐘，
本文編號：1496427
本文鏈接：http://sikaile.net/kejilunwen/dianlilw/1496427.html
本文關(guān)鍵詞： DC-DC變換器 新型拓?fù)浣Y(jié)構(gòu) MMC-HVDC 海上風(fēng)電場 LCC-HVDC 出處：《華北電力大學(xué)(北京)》2014年碩士論文 論文類型：學(xué)位論文
【摘要】：隨著直流電網(wǎng)概念的提出,大容量新型直流輸電裝備成為了研究熱點(diǎn)。DC-DC變換器是直流電網(wǎng)的重要組成部分,一般直流電網(wǎng)中使用的變換器電壓等級較高,而現(xiàn)有的高壓直流變換器技術(shù)不夠成熟,因此急切需要一種可應(yīng)用于高壓大功率場合的DC-DC變換器。基于模塊化多電平(Modular Multilevel Converter,MMC)拓?fù)浣Y(jié)構(gòu),提出了一種可應(yīng)用于未來直流電網(wǎng)的模塊化多電平DC-DC變換器。論文首先介紹了研究學(xué)者在過去幾十年時間里所提出的高壓大功率DC-DC變換器拓?fù)?總結(jié)現(xiàn)有高壓大功率變換的解決思路和方法,包括功率器件的串并聯(lián)技術(shù)、多電平技術(shù)、變換器子模塊的串并聯(lián)技術(shù)等。介紹基于這三種技術(shù)的高壓大功率DC-DC變換器拓?fù)浣Y(jié)構(gòu),工作原理以及不同拓?fù)涞膬?yōu)缺點(diǎn)。其次,提出了一種單向降壓型DC-DC變換器,闡述了 DC-DC變換器拓?fù)浣Y(jié)構(gòu)、工作原理,對比子模塊串并聯(lián)技術(shù)介紹了該DC-DC變換器的優(yōu)勢。PSCAD/EMTDC環(huán)境下的仿真實(shí)驗(yàn)表明新型DC-DC變換器可以很好地實(shí)現(xiàn)直流變壓功能,開關(guān)頻率低且損耗小,直流電壓電流波形理想。在此基礎(chǔ)上,提出一種雙向DC-DC變換器,該變換器可實(shí)現(xiàn)功率的雙向流動。介紹了雙向變換器的拓?fù)浣Y(jié)構(gòu)和工作原理,針對變換器的功率傳輸能力,提出了兩相DC-DC變換器和多相DC-DC變換器,以適應(yīng)大功率場合,并通過仿真驗(yàn)證了兩相DC-DC變換器可以很好地實(shí)現(xiàn)直流變壓功能,且電壓電流波形理想。最后提出單向DC-DC變換器的和雙向DC-DC變換器的控制策略,仿真驗(yàn)證控制策略的可行性與可靠性。在所提拓?fù)浣Y(jié)構(gòu)的基礎(chǔ)上,分析DC-DC變換器的應(yīng)用前景,如海上風(fēng)電場的直流互聯(lián),VSC(Voltage Source Converter)與LCC(Line Commutated Converter)的互聯(lián),多終端高壓直流輸電系統(tǒng)給遠(yuǎn)程負(fù)荷供電等。這些應(yīng)用前景表明了 DC-DC變換器在未來直流電網(wǎng)建設(shè)中一定會擔(dān)當(dāng)起舉足輕重的角色。
[Abstract]:With the introduction of DC network concept, large capacity new DC transmission equipment has become a research hotspot. DC-DC converter is an important part of DC network. However, the existing high voltage DC / DC converter technology is not mature enough, so it is urgent to have a kind of DC-DC converter which can be used in high voltage and high power situation. Based on the modularized multilevel Modular Multilevel converter (MMC) topology, A modularized multilevel DC-DC converter for future DC networks is proposed. Firstly, the topology of high voltage and high power DC-DC converters proposed by researchers in the past decades is introduced. This paper summarizes the existing ideas and methods of high-voltage high-power conversion, including series-parallel technology of power device, multi-level technology, series-parallel technology of converter submodule, etc. The topology structure of high-voltage and high-power DC-DC converter based on these three technologies is introduced. The working principle and the advantages and disadvantages of different topologies. Secondly, a unidirectional step-down DC-DC converter is proposed, and the topology and working principle of the DC-DC converter are described. In this paper, the advantages of the DC-DC converter are introduced by comparing submodule series-parallel technology. The simulation results show that the new DC-DC converter can achieve the DC voltage function well, and the switching frequency is low and the loss is low. Based on the ideal waveform of DC voltage and current, a bidirectional DC-DC converter is proposed, which can realize the bidirectional flow of power. The topology and working principle of the converter are introduced, and the power transmission ability of the converter is discussed. A two-phase DC-DC converter and a multi-phase DC-DC converter are proposed to adapt to the high power situation. The simulation results show that the two-phase DC-DC converter can achieve the DC voltage function well. Finally, the control strategies of unidirectional DC-DC converters and bi-directional DC-DC converters are proposed, and the feasibility and reliability of the control strategies are verified by simulation. Based on the proposed topology, the application prospects of DC-DC converters are analyzed. For example, the direct current interconnection of offshore wind farms, the interconnection of VSC Commutated converters and LCC(Line Commutated converters, The applications of multi-terminal HVDC power supply system to remote load show that DC-DC converters will play an important role in the construction of DC power network in the future.
【學(xué)位授予單位】：華北電力大學(xué)(北京)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM46
【相似文獻(xiàn)】
相關(guān)期刊論文 前10條
1 馬小亮;;多電平電壓型變頻器(下)[J];變頻器世界;2011年11期
2 葉劍鋒;鐘，
本文編號：1496427
本文鏈接：http://sikaile.net/kejilunwen/dianlilw/1496427.html
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