Jin-Hyuk Park, Hae-Gwang Jeong, and Kyo-Beum Lee, "Second Order Harmonics Reduction Technique Using Model Predictive Control for Household Energy Storage Systems," in Proc. APEC Conf., Mar. 2014, pp. 3060–3065. > Paper

This paper proposes an output current ripple reduction algorithm using model-based predictive control (MPC) for an energy storage

system (ESS). In single-phase systems, the DC/AC inverter has a second-order harmonic at twice the grid frequency of a DC-link

voltage caused by pulsation of the DC-link voltage. The output current of a DC/DC converter has a ripple component because of the

ripple of the DC-link voltage. The second-order harmonic adversely affects the battery lifetime. The MPC predicts the output current

of next state from a converter model. The optimal duty is determined by minimizing the error between the reference and the

predicted current. Due to the calculated optimal duty, the dynamic response is fast. The proposed algorithm has an advantage of

reducing the second-order harmonic of the output current in the variable frequency system. The proposed algorithm is verified from ​

the PSIM simulation with the 3 kW ESS model.