Power angle and amplitude decoupling control method for electric springs and static synchronous series compensators

In this paper, a radial-chordal decomposition (RCD) technique is proposed to decouple the power angle and voltage control of a smart load based on the use of electric springs (ES). The paper gives a highlight of the decoupling feature and the merit of achieving multiple functionalities within a single ES. This RCD control method has been tested on a 2 kW small-scale power system. Experimental results confirmed that the power factor of the ES-integrated smart load can be improved by the chordal control while the mains voltage can be regulated by the radial control. It has also been demonstrated that the radial and chordal control can work simultaneously and independently.