Journal of Power Electronics ( IF 1.4 ) Pub Date : 2022-06-20 , DOI: 10.1007/s43236-022-00472-4 Shizhen Sun, Hongjuan Zhang, Xiaoji Wang, Yan Gao, Baoquan Jin
In dual-motor drive systems, a supercapacitor is connected to a common direct current (DC) bus through a DC/DC converter for the storage and utilization of regenerative energy, which is an effective energy saving method. However, the uncoordinated control of this type of system results in undesirable power circulation and reduced energy utilization efficiency. In this paper, an optimal power tracking control strategy based on a power flow predictive model is proposed. The power flow of the system is analyzed and a power flow predictive model is established. In addition, an objective function is deduced from the perspective of optimal performance tracking and minimum grid side energy consumption. The reference power of a supercapacitor is obtained in real time under constraints. The power flows among the grid side, the motors, and the energy storage unit are fully coordinated to realize a reasonable energy distribution. Experimental results indicate that the energy utilization efficiency of the system is improved by 25.4% in comparison with double closed-loop control in one working period.
中文翻译:
潮流预测模型控制提高再生能源存储利用效率
在双电机驱动系统中,超级电容器通过DC/DC转换器连接到公共直流母线,用于再生能量的存储和利用,是一种有效的节能方法。然而,这类系统的不协调控制会导致不理想的动力循环,降低能源利用效率。本文提出了一种基于潮流预测模型的最优功率跟踪控制策略。分析了系统的潮流并建立了潮流预测模型。此外,还从最优性能跟踪和最小网侧能耗的角度推导出了一个目标函数。超级电容器的参考功率是在约束条件下实时获得的。电力在电网侧、电机、与储能单元充分协调,实现能量合理分配。实验结果表明,在一个工作周期内,与双闭环控制相比,该系统的能源利用效率提高了25.4%。