Feedback Linearization Control of Supercapacitor Energy Storage Systems in Distribution Networks

This paper designs a feedback linearization control (FLC) scheme for a supercapacitor energy storage (SCES) system in distribution network, which aims to achieve effective and efficient active/reactive power support considering high-penetration of renewable energy. At first, the input-output linearization is undertaken for SCES system, then FLC is developed by fully compensating the nonlinearities. Thus, a globally consistent control performance can be realized. Two case studies are undertaken which verify that FLC can achieve the faster active/reactive power regulating and effectively suppress the oscillation of active/reactive power under renewable energy penetration in comparison to PID.