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文章从电池快速充电角度出发,基于蓄电池三段式充电策略,提出了一种基于BOOST变流器的多模式直流电源,提高了设备的功率等级、冗余度和可靠性。结合蓄电池三段式充电策略,分析了多模式直流电源的工作原理,藉此构建了系统动态模型。鉴于系统严重的非线性问题,采用了输入输出反馈线性化对系统模型线性化,进而设计了电流和电压的跟踪控制器。搭建了2k W的试验平台,试验发现在单路运行时稳态误差仅有0.3A,即使在稳定性影响最严重的并联运行中单路稳态误差也仅有0.9A,由于采用两路互补对称策略保证了总电流稳态误差在整个充电过程中仅有0.2A,而且总电流在切换瞬态过渡过程中严格无冲击,验证了设备可靠性以及控制策略有效性。
Based on the battery three-stage charging strategy, this paper presents a multi-mode DC power supply based on BOOST converter, which improves the power rating, redundancy and reliability of the device. Combined with battery three-stage charging strategy, the working principle of multi-mode DC power supply is analyzed, and the system dynamic model is constructed. In view of the serious non-linear system problems, the input-output feedback linearization is used to linearize the system model, and the current and voltage tracking controllers are designed. The experimental platform of 2kW is built. The experimental results show that the steady-state error is only 0.3A in single-channel operation, and the single-channel steady-state error is only 0.9A even in the parallel operation with the most serious stability. The symmetrical strategy ensures that the steady-state error of the total current is only 0.2A during the whole charging process, and the total current is strictly non-impact during the transition of transient state, which verifies the equipment reliability and the effectiveness of the control strategy.