Nonlinear control of a single phase shunt active filter connected photovoltaic systems via sliding mode

This paper presents the problem of controlling single-phase active power filter connected photovoltaic system via MPPT. We seek to meet a control strategy for the two following control objectives: i) ensuring the correction of the power factor (PFC) by eliminating harmonics generated by a non-linear load; ii) injecting in the power grid electric energy produced by solar panels, regulated by the MPPT. To achieve the above control objectives, a sliding mode control is designed as a nonlinear control technique applied in the inner loop and a simple proportional-integral (PI) controller is used in the outer voltage control. The System's stability is ensured by Lyapunov framework using system averaging theory. An experiment based on MATLAB/Simulink is designed to confirm the validity of proposed APF controller for this system.

I. Introduction

Electricity requirements are increasing in the recent years in equivalent to changes and technology developments. However, the fact that costs rise in meeting these requirements, Renewable sources of energy such as solar and wind energies, are considered as a good solution to the agenda. The sun is a clean but discontinuous source of energy. A major way of producing electricity directly is to use photovoltaic cells systems. The first solar cell was invented by Charles Fritts in 1884[1]. Now, there are various uses of photovoltaic panels, especially the transport, power satellites and others projects.