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Vol: 57(71) No: 3 / September 2012 Development, Improvements and Validation of a PV System Simulation Model in a Micro-Grid Lucian Mihet-Popa Department of Electrical Engineering, Technical University of Denmark, 4000 Roskilde, Frederiksborgvej 399, Denmark, phone: (45) 2365 2984, e-mail: lmih@elektro.dtu.dk, web: http://www.elektro.dtu.dk C. Koch-Ciobotaru Department of Electrical Engineering, “Politehnica” University of Timisoara, 300223 Timisoara, V. Parvan 2, Romania, phone: (40) 256-403464, web: http://www.et.upt.ro F. Isleifsson Department of Electrical Engineering, Technical University of Denmark, 4000 Roskilde, Frederiksborgvej 399, Denmark H. Bindner Department of Electrical Engineering, Technical University of Denmark, 4000 Roskilde, Frederiksborgvej 399, Denmark Keywords: Distributed Energy Resources, Distributed Generators, incident and tilt angle, Micro-Grid, PV panels, solar radiation Abstract The increasing amount of Distributed Energy Resources (DER) components into distribution networks involves the development of accurate simulation models that take into account an increasing number of factors that influence the output power from the Distributed Generators (DG) systems. The modeling of DER components in power systems and the relative control architecture are an important part for the introduction of relevant quantity of renewable energy in the future smart grid. Therefore it is a strong necessity to have proper validated models to help operators to perform better studies and to be more confident with the results. This paper presents two simulation models developed and implemented in MATLAB/Simulink and DIgSILENT Power Factory of a PV system using the single-diode four-parameter model based on data sheet values. The component models were implemented first in MATLAB/Simulink and the simulation results have been compared with the data sheet values and with the characteristics of the units. To point out the strong dependency on ambient conditions and to validate the simulation models a complex data processing subsystem model has also been developed. A PV inverter model have also been developed and implemented in PowerFactory to study load flow, steady-state voltage stability and dynamic behavior of a distribution system. Validation of simulation models have been carried out using RISO experimental facility SYSLAB which include a PV System as well as a Vanadium Redox Flow Battery-VRB and various loads including an office building-FlexHouse in a LV network which can be operated in different configurations. References [1] K. Richardson, D. Dahl-Jensen, J. Elmeskov, C. Hagem, J. Henningsen, J. A. Korstgård, N. B. Kristensen, P. E. Morthorst, J. E. Olesen, and M. Wier, “Green energy - the road to a Danish energy system without fossil fuels,” Danish Commission on Climate Change Policy, 2010. Available: http://greengrowthleaders.org/green-energy-the-road-to-adanish-energy-system-without-fossil-fuels/. [2] Energynautics GmbH, Longen, Germany, 2010. Available: www.energynautics.com. [3] H. Jiayi, J. Chuanwen, and X. Rong, “A review on distributed energy resources and MicroGrid”, Renewable & Sustainable Energy Reviews, vol. 12, pp. 2472-2483, 2008. [4] S. Seme, G. Stumberg, and J. 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