中低压直流配电网母线电压稳定控制

为了抑制直流配电网内间歇性电源输出功率以及负荷扰动对直流母线电压的冲击,设计一种基于降阶扩张状态观测器的线性自抗扰控制方法,实现直流母线电压的稳定控制.在不增加负荷电流传感器的情况下,实现直流电压控制单元对扰动的快速响应与跟踪,有效提高控制系统的抗扰动性和稳定性.在理论和仿真分析的基础上,将所提控制算法嵌入自主开发的A...

Stability control of bus voltage for medium-and low-voltage DC distribution network

In order to suppress the impacts of intermittent power output and load disturbance on DC bus voltage in DC distribution network, a linear active disturbance rejection control method based on reduced-order extended state observer is proposed to realize stable control of DC bus voltage. In the case of not increasing load current sensor, the DC voltage control unit can quickly respond and track the disturbance, and effectively improve the anti-disturbance and stability of the control system. On the basis of theoretical and simulation analysis, the proposed control algorithm is embedded into the self-developed digital signal processing module of AC/DC converter, and the experiment is designed to simulate DC bus voltage load under the large-disturbance condition, and the comparative analysis is conducted. The results show that the designed controller has better robustness, stability and real-time performance for DC bus voltage control than the traditional dual-PI controller.