【摘要】：針對(duì)常規(guī)的充放電機(jī)的功率因數(shù)低、效率低、諧波大等缺點(diǎn),為提高供電效率,提出一種由雙向AC/DC變換器和三電平半橋/全橋變換器兩級(jí)結(jié)構(gòu)組成的車(chē)載式充放電機(jī),系統(tǒng)具有獨(dú)立的控制環(huán)節(jié),前級(jí)雙向AC/DC變換器采用改進(jìn)的占空比預(yù)測(cè)控制策略,而后級(jí)雙向DC/DC變換器采用PWM加移相控制方式,實(shí)現(xiàn)了網(wǎng)側(cè)和車(chē)載電池側(cè)控制系統(tǒng)的解耦,分析了車(chē)載充放電機(jī)的原理,上述系統(tǒng)實(shí)現(xiàn)了電網(wǎng)側(cè)電流的正弦化和實(shí)現(xiàn)單位功率因數(shù)整流,具有動(dòng)態(tài)響應(yīng)快,跟蹤效果好,效率高等優(yōu)點(diǎn),并對(duì)供電性能進(jìn)行優(yōu)化,通過(guò)仿真驗(yàn)證了車(chē)載供電系統(tǒng)的有效性和可行性。
[Abstract]:Aiming at the disadvantages of low power factor, low efficiency and large harmonics of the conventional charging and discharging machine, in order to improve the power supply efficiency, a vehicle-borne charging and discharging machine consisting of a bi-directional AC/DC converter and a three-level half-bridge / full-bridge converter is proposed. The system has an independent control link. The former bi-directional AC/DC converter adopts an improved duty cycle predictive control strategy, and the latter uses the PWM phase-shift control mode to realize the decoupling between the grid-side control system and the vehicle-mounted battery side control system. The principle of on-board charging and discharging machine is analyzed. The system realizes sinusoidal current and rectifier of unit power factor, which has the advantages of fast dynamic response, good tracking effect and high efficiency, and the power supply performance is optimized. The validity and feasibility of the on-board power supply system are verified by simulation.
【作者單位】： 遼寧工程技術(shù)大學(xué);
【分類(lèi)號(hào)】：U469.72
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本文編號(hào)：2189449