Concept of the real-time hybrid model (ReaTHM® 2) testing framework for marine hybrid power plant is presented. The benefits and challenges with regard to using the model-scale power plant for the testing are explained. As a feasibility study of the methodology, tests are performed at the Hybrid Power Laboratory with a model-scale physical diesel-electric power plant. In this test, a load profile from onboard measurements from a ship is used as a numerical part of the system. In the model-scale power plant, the electrical part of the plant is used as an actuator to generate the load for the diesel engine. The traceability of the components and the total system to the given load profile is quantified in terms of time delay and tracking errors. For conclusion, the limitation of the test is analyzed and suggestions for improving the results are provided.

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