Comparative Study of DC/AC Inverter Control Techniques for Three Phase Grid Connected PV System

Abstract

The goal of this project is to develop and analyze a three-phase grid-connected photovoltaic (PV) system with a 250KW power capacity with expandable property. The PI, Slide, and MPC methodologies are used to test three distinct inverter current control techniques. The dynamic performances of the three inverter control techniques are virtually comparable under grid connected working conditions, although the dynamic performances of the traditional PI control technique are slightly better and smoother than the other two inverter control techniques. The unity power factor criterion was reached by all techniques. The output power levels obtained using the sliding mode inverter control method are higher than those obtained using the PI and MPC methods. MPC's DC link voltage readings are also consistent and match the intended voltage levels.

A Model Predictive Power Control Scheme for PV Inverter and Battery Energy Storage System for a Microgrid

“…Different formulations of the cost function, considering various norms and including multiple variables and weighting factors, are possible. MPC can also accommodate different prediction horizons, and the inputs can be treated as continuous, either through a modulator or by simplifying the implementation by modeling the converter with a finite number of switching states [4]. The paper introduces a straightforward MPC scheme for a three-phase inverter with an output LC filter.…”