Voltage Coordinated Control Strategy for Distribution Network With Controllable Devices Based on Different Time Response Scales

In response to the current challenges of high penetration of renewable energy and excessive complexity of loads, this paper proposes an effective coordinated control strategy by integrating controllable devices with different time response scales in low-voltage distribution networks. Firstly, the controllable voltage regulation devices with different response time scales are analyzed. Then, a coordinated control strategy for multiple controllable voltage regulation devices is presented. Finally, MATLAB/SIMULINK is used to simulate and validate the proposed strategy in both an improved IEEE 33-node system and a practical low-voltage distribution system in a city in Zhejiang Province. In the improved IEEE 33-node system, the voltage deviation is reduced to 3%, and the voltage deviation improvement reaches 95.07%. In the practical low-voltage distribution system of the city in Zhejiang Province, the voltage deviation is reduced to 1.7%, and the voltage deviation improvement reaches 99.04%. These results effectively address the issues of voltage violations caused by renewable energy integration and the complexity of loads, providing assurance for the safe and stable operation of low-voltage distribution networks.