Electrical networks are designed and supplied through the use of industry standard simulation tools and hardware.
![[Image] Power Monitoring System](/Images/PMS_screen-250x266px_tcm92-48012.gif "[Image] Power Monitoring System")
An integrated analysis environment has been developed that allows power system analysis on a range of equipment including the mix of mechanical and electrical systems, hybrid configurations and their controls.
What next...
AFE Frequency drives
Rolls-Royce water cooled frequency convertors or drives are specially designed for marine installations, where there are special demands on ambient conditions and high power density. Active Front End (AFE) technology is used to avoid harmonic distortion and to transfer power in both directions.
![[Image] AFE Cabinet](/Images/AFE-cabinet300x286px_tcm92-48014.gif "[Image] AFE Cabinet")
Modular construction maximises availability and minimises maintenance times, while ensuring a common spares holding. Drives can be used for induction synchronous and permanent magnet AC motors.
Power range:
- 380-500V AC 400-2500kW
- 525-690V AC 700 – 5700kW
Power distribution and conversion
A comprehensive range of medium and low voltage marine switchboards, distribution and motor starter boards are designed and supplied to meet both naval and commercial standards.
![[Image] Rolls-Royce low-voltage switchboards optimised for the marine market](/Images/Power%20distr%20conv%20350x190px_tcm92-48015.jpg "[Image] Rolls-Royce low-voltage switchboards optimised for the marine market")
Rugged modular units have shock ratings from 15-22g, and bespoke naval designs up to 70g.
- Main/auxiliary switchboards
- Disrtribution/emergency switchboards
- Intelligent switchboards
- Motor control centres (MCC)
- LV Drives
Power Management Systems (PMS)
Simply shifting modes
A challenge with complex hybrid systems is that changing operating modes can be complicated. The newly developed Rolls-Royce ACON Mode Shift system automates the process, so that with a single keystroke on the bridge the captain can shift from one mode to another.
Optimal and economic operation also requires an overview of the ship systems, so the captain and the engineers need to see how efficiently the systems and equipment is working.
Here, the ACON Economy Picture provides the basis for optimisation, or indicates the need to move to a different mode.
Combining these products with a Rolls-Royce power and propulsion system gives a unique combination of user-friendliness and flexibility, not only when the vessel is new, but also later in life, when the operating profile may well have changed.
Key Functions
- Automatic load dependent start/stop
- Automatic stand-by start after black-out
- Sequential starting selection
- Automatic syncronisation/load sharing
- Load shedding
- Load and frequency control
Blackout Prevention System
- Ensures necessary power is always available
- Constantly monitors all key components which can cause an electrical blackout
- Reacts in milliseconds
Digital Excitation System
- Automatic voltage regulation for synchronous electrical machines
- Direct voltage sensing with dedicated protection, bus-communication monitoring and over-boost device
- Ensures stable network voltage in all load conditions
Voltage Quality Monitoring
- Monitors grid quality in electrical power plants with AFE drives
- Analyses several specific harmonic ranges affected if a failure in LCL filter occurs, total harmonic distortion and live ground to earth voltage
- Can be delivered as a stand-alone unit or integrated with black-out prevention
