Simulation and Analysis of Existing MPPT Control Methods in a PV Generation System

Abstract

-Maximum Power Point Tracking (MPPPT) techniques are employed in PV systems to make full utilization of PV array output power which depends on solar irradiation and temperature. Recently, many MPPT algorithms and control schemes of PV system have been proposed, but different control methods and different PID controller parameters lead to different output efficiency and dynamic response. Therefore, in this paper, a PSCAD/EMTDC user defined module of the solar array is established to easily simulate its inherent characteristics with the basic specification data. Moreover, we also compare the advantages and weakness of the existing MPPT control methods by simulations to give a reference to the Grid-Connected Photovoltaic System (GCPS) designers.

Modeling and Simulation of a Photovoltaic Field for 13 kW

“…The Incremental Conductance (INC-CON) algorithm is based on the observation that the following equations (12) and (13) hold for the MPP. The principle of this method is to judge whether the system work at MPP or work at the left or the right [9].…”

“…There exist various equations to define the output of an inverter according to the delivered power. We use the same formula of Macagnan presented previously in equation (9). For our inverter, the values of the outputs with 10 and 100% of Pnom are:…”

Electrical Modelling Of a Photovoltaic Module

“…The photovoltaic effect of a semiconductor PN-junction can be used to describe the working principle of a PV array [2]. An equivalent circuit of a PV module can be represented as shown in Fig.…”

“…Practically, R sh is very large and hence the current through this resistance can be neglected. The final expression for the load current considering I sh is as shown in equation 1 [2].…”

“…Using an appropriate simplified model of Fig. 2, equation (2) can be written in the form of equation 5 [2]. For an ideal PV module, there are no series losses and leakage losses to ground i.e.…”