In order to design model-based controllers applicable to hybrid renewable energy systems (HRES), it is essential to model the HRES mathematically. In this study, a standalone HRES, consisting of a photovoltaic (PV) array, a lead-acid battery bank, a pitch-controlled wind turbine, and a three-phase permanent magnet synchronous generator (PMSG), supplies a variable DC load demand through two boost-and buck-type DC-DC converters. It is shown that the mathematical model of the HRES can be represented by a system of nonlinear hybrid differential algebraic equations (hybrid DAEs). The developed model in this paper employs the Modelica language that allows object-oriented and acausal modelling of the multimode systems. The OpenModelica environment is utilised to compile the model and simulate the system. It is shown that the simulation provides a sufficiently accurate prediction of all the differential and algebraic states including mode transitions. The results of the simulation show a good match with the information available in the components datasheet.
|Title of host publication
|2013 UKSim 15th International Conference on Computer Modelling and Simulation
|David Al-Dabass, Alessandra Orsoni, Jasmy Yunus, Richard Cant, Zuwairie Ibrahim
|Number of pages
|Published - 2013
|UKSim-AMSS 15th International Conference on Computer Modelling and Simulation (UKSim) - Cambridge
Duration: 10 Apr 2013 → 12 Apr 2013
|UKSim-AMSS 15th International Conference on Computer Modelling and Simulation (UKSim)
|10/04/13 → 12/04/13
Bibliographical noteThe authors would like to thank the Synchron Technology Ltd. for their financial support of this research.
- photovoltaic (PV)
- wind turbine
- hybrid renewable energy system (HRES)
- acausal modelling
- hybrid DAE