本文關鍵詞：單相車載充放電機前級可逆整流器研究　出處：《重慶大學》2014年碩士論文　論文類型：學位論文

  更多相關文章： V2G 單相車載充放電機 可逆整流器 諧波抑制 陷波濾波器

【摘要】：隨著能源危機的不斷加重，電動汽車作為一種節(jié)能減排的有效手段正在不斷地被推廣應用，電動汽車動力電池作為一個移動的分布式儲能單元可以在電網(wǎng)高峰負荷時段向電網(wǎng)傳輸電能，而在電網(wǎng)非高峰負荷時段電網(wǎng)又向其充電，這就是目前日益受到關注的V2G技術。在典型的V2G技術中，電動汽車車載充放電機是實現(xiàn)電動汽車和電網(wǎng)能量互動的重要中間接口，其一般為雙向AC/DC和雙向DC/DC級聯(lián)的兩級結構，其前級變換器對于滿足車載充放電機高功率因數(shù)、能量雙向流動、較低的電流諧波畸變率的要求發(fā)揮了重要作用，本文將單相可逆PWM整流器作為其前級雙向AC/DC變換器，對其進行相關研究。 本文首先在單相可逆PWM整流器主電路拓撲結構的基礎上建立了其瞬時等值電路模型并對所采用的雙極性調制策略下電路的電流回路進行了分析。根據(jù)課題的指標要求設計了主電路參數(shù)并對電壓電流環(huán)均采用PI控制器的單相可逆PWM整流器進行了環(huán)路設計和仿真分析。 其次，針對車載充放電機低諧波畸變率和高功率密度的要求，提出在前級可逆PWM整流器中采用多重諧振控制器和陷波濾波器相結合的控制策略，相比于傳統(tǒng)PI控制器有效地降低了輸入電流中的低次諧波含量，同時避免了有源及無源濾波器的使用，，提高了功率密度；由于加入多重諧振控制器的電流內環(huán)成為一個高階系統(tǒng)，控制器參數(shù)設計困難，文中采用根軌跡分析法，利用系統(tǒng)的等效參量根軌跡對控制器的參數(shù)進行了詳細的分析和設計；在理論分析及參數(shù)設計的基礎上搭建了Matlab/Simulink仿真模型進行仿真研究，仿真結果驗證了理論分析及所提控制策略的有效性。 最后，根據(jù)課題指標要求搭建了3.5kW基于DSP28335的實驗樣機系統(tǒng)進行實驗研究和驗證，主要包括硬件系統(tǒng)和軟件系統(tǒng)，完成了硬件電路中主功率電路及控制電路的設計選型；完成了軟件系統(tǒng)的主體程序設計并對AD采樣、鎖相程序、SPWM波形產(chǎn)生子程序進行了詳細分析設計，提出一種簡單實用的軟件過零鎖相方法提高了鎖相精度；在所搭建的實驗樣機平臺的基礎上進行了各部分硬件及軟件程序的調試，并對前級單相可逆PWM整流器進行了穩(wěn)態(tài)及動態(tài)特性實驗測試，為下一步工作奠定了基礎。
[Abstract]:With the energy crisis worsens, the electric car as an effective means of energy saving and emission reduction are constantly being applied, the electric vehicle power battery as a mobile distributed storage unit can transmit power to the grid in the peak load period, while in power grid and off peak hours to charge it, this is at present, the V2G technology has been paid more and more attention. In a typical V2G technology, electric vehicle charging motor is an important intermediate interface electric vehicles and power grid energy interaction, which is generally two level structure with bidirectional AC/DC and two-way DC/DC, the pre stage converter for high power motor vehicle to meet the filling factor the two-way flow of energy, low current harmonic distortion rate requirements play an important role in the single-phase reversible PWM rectifier as the first stage of bi-directional AC/DC converter, related to the Research.
Based on the topology structure of single-phase reversible PWM rectifier main circuit is established on the equivalent circuit model of the instantaneous and the current loop circuit of the bipolar modulation strategy used was analyzed. The single-phase reversible PWM rectifier according to the requirement of the project design and the index of main circuit parameters on the voltage and current loop using PI controller the analysis of the loop design and simulation.
Secondly, according to the vehicle charge discharge low harmonic distortion and high power density requirements, puts forward the control strategy in the first level PWM reversible rectifier uses multiple resonant controller and notch filter combination, compared to the traditional PI controller can effectively reduce the harmonics in the input current, while avoiding the use of active and the passive filter, and improve the power density; the current loop add multiple resonant controller into a high order system, difficult parameter to design the controller, using the root locus method, the equivalent parameters of system parameters by using the root locus of the controller are analyzed and designed in detail; simulation model is built based on Matlab/Simulink the theoretical analysis and parameter design of the simulation, the simulation results verify the theoretical analysis and the effectiveness of the proposed control strategy.
Finally, according to the project requirements to build 3.5kW were studied and verified by an experimental prototype system based on DSP28335, including hardware system and software system, complete the design and selection of the main power circuit and control circuit in hardware circuit; completed the main body of program design software system based on AD sampling, phase lock procedures, SPWM waveform generation the subroutine of a detailed analysis of the design, puts forward a simple and practical software phase-locked zero method improves the precision of PLL; debugging of each part of the hardware and software program based on experimental prototype platform to build on, and the single-phase reversible PWM rectifier experiment of static and dynamic characteristics test, laid the foundation for the next step.

【學位授予單位】：重慶大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM461

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