Multi-electric springs coordinated control method for grid voltage optimization

Abstract

The power imbalance between the source and the load is aggravated by the large number of new energy connections. Electric Spring (ES) can adjust the load side. Due to the limited capacity of a single power spring, it is necessary to install multiple power spring support system voltages in the power grid. However, multiple power springs need coordinated control methods to ensure their stable operation. In this paper, a coordinated control method for multiple power springs is proposed to optimize the voltage of the grid-connected points. First, the phenomenon of voltage deviation at each gridconnected point is analyzed. Then, according to the two-port impedance model of the power spring, an optimization model for the voltage deviation at the grid-connected point of the power spring is proposed, and solved by the particle swarm optimization algorithm. Finally, the coordinated control method for multiple power springs is given. The proposed method effectively reduces the voltage deviation of the grid connection point and enables the power spring to remain stable when the system voltage fluctuation is large. Finally, the validity of the proposed method is verified by PSACD simulation.