Open-Delta Three-Phase Inverter Current Control Using Predictive Control For PV System Connected To The Grid

Abstract. Predictive control method has advantages such as simple structure, functional and follow the simple mathematical. In this paper, a new method is provided for controlling the open-Delta three-phase inverter . Model-based predictive control system is used for controlling the current of a open-Delta three-phase inverter, which is in the process of converting the photovoltaic energy conversion plays a three-phase network. The controller at any time, the next period current are estimated using a model system. Four switches are used to build a open-delta three-phase inverter, that Four signal switches are necessary for inverter and Signals can be done based on the cost function minimization. Open-Delta Three-phase inverter, produces four pulses required to conduct two basic switching using switching PWM. Appropriate choice of switching states and estimated future states of the phase currents, the inverter may be provided with reasonable accuracy the phase currents. In this study the effect of different parameters such as: inductance coupling inductors, capacitors and reference current is evaluated on the performance of the proposed controller. A sample of inverters, with nominal power 3300 VA is simulated by SIMULINK MATLAB software.  At the simulation section of  paper, An example of the current predictive controller is designed for Open-Delta three-phase inverter , and is implemented in SIMULINK MATLAB software. The current predictive controller for the six-switch three-phase inverter is designed and implemented in SIMULINK MATLAB software and simulation results have been compared both three-phase inverter topology .