Improving the integration of electric propulsion systems in Royal Navy vessels

摘要

Following the introduction of Integrated Electric Propulsion (IEP) systems into the Royal Naval, several important lessons have been learnt. These lessons must be pulled through to the wider community to improve the operability, reliability and survivability of future IEP design. It is believed that the areas that will offer the greatest benefits are in the field of whole system integration. This includes the integration of power generation, distribution, propulsion and other end user equipments as well as the less obvious services such as heat management. Recent experience has identified that the availability of a broad range of equipment is being compromised on vessels fitted with IEP systems. This is due to its susceptibility to large voltage and frequency variations. As such, on-board equipment is severely damaged and/or prematurely aged by power system transients. This directly degrades the readiness and capability of the platform and has adverse affects on the through life cost. Due to the nature of Naval operations and current training routines the systems installed can face unique operating conditions. Present experience shows that problems appear to be occurring in normal operation of the plant, and are not only attributable to the extreme operating environment. Discussion of the issues encountered is provided with details of voltage and current perturbations found on operational vessels. The impact and ramification of these perturbations is highlighted with the high support costs in the initial life of the platforms. Work has been conducted to identify methods to reduce the disturbances observed onboard; this includes improvements for pre and post platform production. In addition, work has focused on raising the profile of system integration issues. The way forward for the Royal Navy will be examined, looking at potential modifications to current vessels as well as methods for improving the system integration of new vessels coming through i.e. T45, CVF.