Deliverable D2.2 – Definition of control and monitoring architecture

This deliverable presents the definition of the control and monitoring architecture of the
FLEXSHIP concept. It also reports the outcome of the Task 2.2 – “Model-based
development of control and monitoring architecture”. The deliverable outlines the
proposed control and management system architecture of the hybrid power system
(HPS) and electric propulsion system, from high-level to low-level control layers, defining
functional and communicational links between various control components and
functions. For this objective, both functional and physical layers of the control system are
sketched.

In a modern HPS, a Power Management System (PMS) is responsible for the secure
control and monitoring of the power system, containing functions like load sharing, power
system monitoring, and protection. The PMS functions as the “brain” of the power system.
In this work, a PMS is developed, implemented in simulation environment, and verified
based on simulations. The developed PMS is applicable to both demonstrator vessels
(DEMOs), such as DEMO-1/Research Vessel Gunnerus and DEMO-2/Atatürk vessel, and
is tuned individually for both DEMOs. Here the focus is reliability and power availability
rather than the optimality. The PMS will then manage the power dispatch between the
engine-generator sets (EGs) and energy storage systems (ESSs), and including both
alternating current (AC) and direct current (DC) grid, to ensure that the required power and
thrust is available under worst case failure. The PMS continuously and on real-time basis
monitors the power system with variables such as available power, state of the ESS,
required propulsion power, and other electric loads such as hotels loads and auxiliaries.

To verify the PMS functionalities, power components, such as battery ESS, EGs, and
propulsion loads are modelled, and integrated with the control system. Then, load sharing
strategies are developed, implemented, and validated with real load profiles from the use
case vessels and under load fluctuations. Fault situations are also tested to verify the
control performance under failures. The software package of the PMS, as an outcome of
the T2.2, will be integrated into the FLEXSHIP Green Digital Twin (GDT), with Energy
Management System (EMS) and other controllers. The functionality of the total vessel
control system with the power components is then verified in the GDT setup as part of the
T2.5.

The report is confidential, though a comprehensive summary is shared here.