Modeling and Control of Photovoltaic Systems Integrated to Distribution Networks

This paper presents a simulation model of all the electrical components constituting a PV (Photovoltaic) power plant connected to distribution network. The model contains a detailed representation of the main system components, this modeling is an essential step to evaluate the characteristics of a PV plant, all equipment represent the PV system connected to the network are modeled and simulated, such as, PV field, boost, inverter, filter and distribution network. It is opted for PWM (Pulse Width Modulation) command, because the power involved is important, which requires a control of the switching frequency. This paper focus on the control system which uses two control loops: an external control loop which adjusts the DC voltage and an internal control loop which regulates the active and reactive currents. The performance of the proposed model is verified by several simulation studies conducted under MATLAB/Simulink environment.