PLANNING, IMPLEMENTATION AND VALIDATION OF A POWER SYSTEM SIMULATION MODEL FOR INTERNAL COMBUSTION ENGINE BASED HYBRID POWER PLANTS

The growth of renewable energy in energy production has opened substantial markets for hybrid energy systems. Great potential can be seen especially in integrating conventional engine-driven generators with renewables and energy storages. For example, in islands and remote areas, such hybrid solutions can lead to significant technical, economic and environmental benefits compared to traditional engine power plants in terms of fuel savings, reduced carbon emissions, improved plant efficiency and energy security. Wärtsilä has entered into renewable energy and energy storage markets recently. Profiling as an energy system integrator has created a need for modelling and simulation of hybrid power plant operations. The aim of this study is to develop an electrical power system simulation model to be used as a standard model for simulations of Wärtsilä’s hybrid power plant projects. The model is intended to perform power system transient stability studies and further utilized in project-specific sales support cases. As a result of this study, the hybrid power plant simulation model was constructed using DIgSILENT PowerFactory software. At this stage the simulation model was developed for hybrid power plants consisting of Wärtsilä engines and battery energy storage systems. The performance of the developed model was evaluated by three case studies. The results verified the validity of the model for representing the dynamics of engines and battery energy storage systems with a sufficient accuracy. Parametrization of the simulation model took a centre stage in the study. From now on, the simulation model with defined parameters can be used as a standard for simulations of operations of engines and battery energy storage systems.fi=Opinnäytetyö kokotekstinä PDF-muodossa.|en=Thesis fulltext in PDF format.|sv=Lärdomsprov tillgängligt som fulltext i PDF-format