[关键词]
[摘要]
传统双向能源充放电控制系统忽略了对电流内环和电压外环的控制,导致传统系统的应用效果不理想。为此,设计基于车联网的V2G模块开发及双向能源充放电控制系统。利用双向DC/DC控制电压升降,保持充放电情况下电流电压的恒定,利用电压电流双闭环的空间电压矢量,控制三相半桥电压型PWM整流器,通过PI调节器控制电流内环和电压外环,利用受控状态下的负载电流双向流动,实现双向DC/DC变换器的控制,最终实现能量的双向流动。试验结果表明:所设计的系统电池组电压、电流在0.1 s内即可趋于稳定,且三相交流侧的输出电压与单相交流侧电压分别在约0.02 s和0.12 s时达到稳定。电压相位与电流相位之间相差180°,电流波形良好,交流侧电流谐波得到有效抑制。
[Key word]
[Abstract]
The traditional two-way energy charge and discharge control system neglects the control of current inner loop and voltage outer loop, which leads to the unsatisfactory application effects. Therefore, a vehicle to grid (V2G) module based on internet of vehicle and a two-way energy charge and discharge control system are designed. Voltage fluctuation is controlled by two-way DC/DC converterto keep the current and voltage constant under charging and discharging conditions. Space voltage vector of the voltage and current double-closed-loop is used to control three-phase half-bridge voltage source PWM rectifier. The current inner loop and voltage outer loop are controlled by PI regulator, and the two-way flow of load current in a controlled state is used to realize the control of the two-way DC/DC converter, and finally realize the two-way flow of energy. The test results show that the voltage and current of the battery can be stable in 0.1 s, and the output voltage of the three-phase AC side and the single-phase AC side can be stable in 0.02 s and 0.12 s, respectively. The phase difference between voltage and current is 180°, the current waveform is good, and the current harmonics on AC side are effectively suppressed.
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