【摘要】：摘要：混合動力動車組項目是由北車長春軌道客車股份有限公司和北京交通大學合作開展的。其中輔助供電系統(tǒng)是其電氣裝備核心組成部分之一,其為混合動力動車組上除牽引傳動系統(tǒng)之外的所有其他用電設備進行供電。輔助供電系統(tǒng)中輔助變流器又是一個必不可少的關鍵電氣組成部分,它為列車的空調(diào)系統(tǒng)、通風機、照明、充電機以及冷卻風機等交流負載提供穩(wěn)定的三相380V50Hz電源,其運行的穩(wěn)定與否,直接影響了列車上包括牽引系統(tǒng)在內(nèi)的其他電氣裝置的正常運行。本文基于理論和工程的研究基礎,設計了混合動力動車組的輔助變流器系統(tǒng),包括了主電路設計和控制系統(tǒng)設計,并對其可行性進行了仿真和實驗,最終驗證了方案的可行性。 首先,本文對不同型號CRH動車組的輔助供電系統(tǒng)進行了比較分析。比較了這些輔助供電系統(tǒng)的特點,并著重分析了其輔助變流器的拓撲結構。通過研究以及根據(jù)實際項目需求,我們選擇了適合混合動力動車組的輔助供電系統(tǒng)方案,并初步確定了輔助變流器的拓撲結構。 其次,根據(jù)已經(jīng)確定的輔助變流器拓撲方案以及項目實際技術指標要求,完成了主電路拓撲的最終設計。然后通過計算及仿真驗證,對主電路上的所有元器件進行選型,使其能夠滿足電壓、電流、溫度等條件。 完成了主電路的設計,接下來是對控制系統(tǒng)的設計。本文對雙動力輔助變流器的控制策略進行了分析并進行了軟件實現(xiàn)。整個系統(tǒng)采用數(shù)字控制技術,核心芯片采用TI公司生產(chǎn)的DSP TMS320F28335,調(diào)制策略采用SVPWM,中間通過PI進行雙閉環(huán)控制,并在雙閉環(huán)控制的基礎上進行了前饋改進。另外,對控制系統(tǒng)的保護策略也進行了介紹,通過硬件和軟件同時進行保護,保證了可靠性。最后,還對不平衡和非線性負載問題作了簡要分析。 本文的最后一部分是仿真和實驗部分。對之前的器件選型、控制策略方法等進行仿真驗證,證明之前的設計是行之有效的。在仿真成功的基礎上,再搭建實驗平臺,進行實驗。經(jīng)過實驗驗證,其結果與仿真結果及理論分析相吻合,驗證了整套方案設計的可行性,實現(xiàn)了功能,同時為以后的工程應用和產(chǎn)品化提供了一定理論依據(jù)和前期實驗基礎。
[Abstract]:Abstract: hybrid EMU project was carried out by North car Changchun Railway bus Co., Ltd and Beijing Jiaotong University. The auxiliary power supply system is one of the core components of its electrical equipment. It supplies power to all the electric equipment except traction transmission system on the hybrid EMU. Auxiliary converter in auxiliary power supply system is an essential key electrical component. It provides stable three-phase 380V50Hz power supply for AC loads such as train air conditioning system, ventilator, lighting, charger and cooling fan, etc. The stability of the train directly affects the normal operation of other electrical devices, including traction system. Based on the theory and engineering research, this paper designs the auxiliary converter system of hybrid EMU, including the main circuit design and control system design, and carries on the simulation and the experiment to its feasibility, finally validates the feasibility of the scheme. Firstly, the auxiliary power supply system of different types of CRH EMU is compared and analyzed in this paper. The characteristics of these auxiliary power supply systems are compared, and the topology of the auxiliary converters is emphatically analyzed. Through the research and according to the actual project demand, we select the auxiliary power supply system scheme suitable for the hybrid EMU, and preliminarily determine the topology of the auxiliary converter. Secondly, the final design of the main circuit topology is completed according to the determined auxiliary converter topology scheme and the actual technical requirements of the project. Then all the components on the main circuit are selected by calculation and simulation, so that they can meet the conditions of voltage, current, temperature and so on. Completed the design of the main circuit, followed by the design of the control system. In this paper, the control strategy of dual-power-assisted converter is analyzed and realized by software. The whole system adopts the digital control technology, the core chip adopts the DSP TMS320F28335, modulation strategy produced by TI Company and adopts the SVPWM, intermediate to carry out the double closed loop control through the PI. Based on the double closed loop control, the feedforward improvement is carried out on the basis of the double closed loop control. In addition, the protection strategy of the control system is also introduced, and the reliability is guaranteed by simultaneously protecting the hardware and software. Finally, the unbalanced and nonlinear load problems are briefly analyzed. The last part of this paper is simulation and experiment. The previous device selection, control strategy and so on are simulated and verified, and the previous design is proved to be effective. On the basis of the successful simulation, the experiment platform is set up and the experiment is carried out. The experimental results are in good agreement with the simulation results and theoretical analysis. The feasibility of the whole scheme design is verified and the functions are realized. At the same time, the theoretical basis and the preliminary experimental basis are provided for the future engineering application and product production.
【學位授予單位】：北京交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U266;TM46

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本文編號：2432549