PROJECT TITLE: Energy Management and Advanced Control of Future Marine Power Systems
PhD period: 2018.07.01 - 2021.06.30 (has been prolonged till 2021.12.31).
Section: Power Electronic Systems
Research Programme: Efficient and Reliable Power Electronics
Supervisor: Frede Blaabjerg
Co-Supervisors: Tomislav Dragičević and Mohammad Hassan Khooban
Collaborator: Maersk Drilling.
By fluctuation of the fuel price, ship owners are forced to optimize the energy consumption in marine vessels. As a result, growing efforts have been reported to make the onboard energy systems more efficient. Reducing the fuel consumption decreases vessel operational cost and greenhouse gas (GHG) emission which has a destructive impact on the air quality. Therefore, this is a good incentive for the vessel owner to implement methods that reduce fuel consumption. Diesel engines are users of the fuel in ships therefore, the energy management of them and a proper advanced control system are efficient way to reduce the fuel consumption and GHG emission in marine power systems.
Ship diesel engines play a significant role in marine vessel systems and they are paired with generators to produce electric energy, which is used by electric motors for propulsion of the vessel, and also by other consumers, such as hotel loads and drilling drives. The power plant of the marine system consists of multiple pairs of diesel engines and generator set. The generator sets deliver power to the propulsion units as well as other consumers. Because of electrical equipment in shipboard power systems, there are many constraints related to power plants.
A fundamental constraint in the shipboard power system is the need to make the balance between supply and demand, immediately and robustly. Considering that the energy storage system (ESS) can store and release the energy and power at different times, the usage of them is a practical, reliable and efficient way of satisfying the power balance constrain. A power management system (PMS) is used for coordinated control of the shipboard power system. The main objective of PMS is to reduce the fuel consumption while making sure that sufficient power is available and preventing blackouts in case of faults. The PMS must communicate with all main consumers, producers, and distributors in the power plant. ESS increases the PMS freedom and as a result, installing a proper ESS in the ships leads to more efficient and flexible PMS.
This project will investigate the topology of shipboard power systems to find a convenient ESS, optimal sizing of that and efficient PMS for marine vessels for reducing operational cost while satisfying marine power system constraints. In addition, the project provides a dynamic method for controlling the marine power system.
Publications in journals and conference papers may be found at VBN.