CDM Controller Design of a Grid Connected Photovoltaic System Jo˜ao Paulo Coelho 1(B) , Wojciech Giernacki 2 , Jos´e Gon¸ calves 1 , and Jos´e Boaventura-Cunha 3,4 1 Research Centre in Digitalization and Intelligent Robotics (CeDRI), Instituto Polit´ecnico de Bragan¸ ca, Campus de Santa Apol´onia, 5300-253 Bragan¸ ca, Portugal {jpcoelho,goncalves}@ipb.pt 2 Institute of Control and Information Engineering, Poznan University of Technology, ul. Piotrowo 3A, 60-965 Poznan, Poland Wojciech.Giernacki@put.poznan.pl 3 Escola de Ciˆencias e Tecnologia, Universidade de Tr´as-os-Montes e Alto Douro, Vila Real, Portugal jboavent@utad.pt 4 INESC TEC Technology and Science, Campus da FEUP, 4200-465 Porto, Portugal Abstract. Distributed power sources will become increasingly ubiqui- tous in the near future. In this power production paradigm, photovoltaic conversion systems will play a fundamental role due to the growing ten- dency of energy price, and an opposed trend for the photovoltaic panels. This will lead to increased pressure for the installation of this particular renewable energy source in home buildings. In particular, on-grid pho- tovoltaic systems where the generated power can be injected directly to the main power grid. This strategy requires the use of DC-AC invert- ers whose output is synchronized, in phase, with the main grid voltage. In order to provide steady output in the presence of load disturbances, the inverter must work in closed-loop. This work presents a new way to design an inverter controller by resorting to the CDM design tech- nique. The obtained results suggest that the controller achieved with this method, although simpler than other methods, leads to an accept- able and robust closed-loop response. Keywords: CDM · Power converter · Renewable energy 1 Introduction At the present time, there is a strong tendency toward a decentralised electric energy production paradigm. That is, an electrical energy consumer can be, at the same time, also an electric energy producer. This paradigm implies that the classical electrical grid topology will evolve in the future to a micro-grid network mesh. This trend results in several phenomena that can be identified at different social levels. Among them, is the increasing value paid by each kilowatt-hour c  The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Switzerland AG 2021 J. A. Gon¸calves et al. (Eds.): CONTROLO 2020, LNEE 695, pp. 570–581, 2021. https://doi.org/10.1007/978-3-030-58653-9_55