Automated Procedure for Calculating the Controller Parameters in Photovoltaic DC/DC Converters

作者：Gonzalez D^*; Ramos Pajal C A; Petrone G

来源：International Review of Electrical Engineering, 2011, 6(7): 3027-3040.

• Photovoltaic Systems
• Grid Connected
• State Space Model
• Control Systems
• Automatic Controller Calculation

In the photovoltaic (PV) systems, the main objective of the control strategies is to extract the maximum power from the source, which is usually obtained by combining the action of the MPPT algorithm with a voltage regulator used to attenuate the disturbances at the source terminals. This work proposes an automatic procedure for designing the parameters of the voltage compensation network in which, the system stability margins and dynamic constraints are previously defined. Such a method permits the controller calculation by means of sequential operations without dealing with formal concepts of linearization and control design. Moreover, the method is based on the modeling of the complete PV system (source, converter and load) and takes into account the main parasitic components also. The method has been implemented in Matlab code, and validated by means of dynamic simulations and the power electronics simulator PSIM. The designed voltage control loop has been tested also together with a P&O MPPT algorithm in order to regulate the PV voltage in a double stage grid-connected system in presence of a wide voltage oscillation at the DC-bulk and with fast irradiance variation. Experimental results were also carried out to verifii the goodness the proposed approach.

• 出版日期2011-12