During the operation of the independent DC microgrid, the bus voltage will fluctuate with the random changes of the load and source. To maintain the stability of the bus voltage, a control strategy needs to be introduced in the DC microgrid. According to the bus voltage change of DC microgrid, this paper establishes a large-signal mathematical model of DC microgrid with constant power load. Taking the bidirectional DC-DC converter as the control object, a sliding mode variable structure controller based on the washout filter is introduced, and the bus voltage is stabilized at the desired voltage value through the selection of control parameters. The simulation experiment results show that the control strategy proposed in this paper can effectively restrain the fluctuation of the bus voltage under the condition of random changes of the load and source and has strong robustness. © 2021 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

中文翻译：

---

恒功率负载直流微电网母线电压稳定控制方法

在独立直流微电网运行过程中，母线电压会随着负载和电源的随机变化而波动。为了保持母线电压的稳定，需要在直流微电网中引入控制策略。根据直流微电网母线电压的变化，建立了恒功率负载直流微电网大信号数学模型。以双向DC-DC变换器为控制对象，引入了一种基于洗出滤波器的滑模变结构控制器，通过控制参数的选择，将母线电压稳定在所需电压值。仿真实验结果表明，本文提出的控制策略能够有效抑制负载和电源随机变化条件下的母线电压波动，具有较强的鲁棒性。© 2021 日本电气工程师学会。由 Wiley Periodicals LLC 出版。