Constant switching frequency finite control set model predictive control applied to the boost converter of a photovoltaic system. (1st September 2019)

• Record Type: Journal Article
• Authors: Cunha, R.B.A.; Inomoto, R.S.; Altuna, J.A.T.; Costa, F.F.; Di Santo, S.G.; Sguarezi Filho, A.J.
• Is Part Of: Solar energy. Volume 189(2019)
• Page Start: 57
• Page End: 66
• Publication Date: 2019-09-01
• Subjects: Finite control set model predictive control -- Boost converter -- Photovoltaic systems -- Constant switching frequency; Solar energy -- Periodicals; Solar engines -- Periodicals; 621.47
• DOI: 10.1016/j.solener.2019.07.021
• Languages: English
• ISSNs: 0038-092X

Abstract

Highlights: A finite control set with constant switching frequency for a PV boost converter. Improved current response time compared to the 2p2z controller. Voltage settling time and overshoot improvements compared to the 2p2z controller. Abstract: This paper proposes a constant switching frequency finite control set model predictive control applied to the boost converter of a photovoltaic system. The controller consists of two control loops: the outer voltage control loop employs the voltage reference generated by the MPPT and the system model to calculate the inductor predicted current reference for the converter, in order to minimize the error in the voltage at the terminals of the panel. The inner current control loop minimizes the current error to obtain a cost function calculated from the current variation rates in the inductor for the two possible states of the switch. The resulting equation gives the converter's duty cycle, thus ensuring constant switching frequency. The obtained results are compared with a two-pole two-zero controller using an experimental setup presenting a reduction in the settling time, steady-state error and overshoot, attesting the controller performance.