HMA HC800
Communication between
Dynamic Positioning System
and
Power Management System
What is needed?
DOCUMENT HISTORY
Revision
Index
Chapter
Description of changes
Prepared
01
Document first issue
KH/HMA
2012-04-25
02
Updated
KH/HMA
2013-02-02
HMA-B-HC800-DP_PMS-TD-01
Checked
Approved
Date
Høglund Marine Automation AS
HMA HC800 – Technical Description
INDEX
1 INTRODUCTION.....................................................................................................................................................3 1.1 1.2 1.3 1.4 2 INTENTION AND SCOPE .........................................................................................................................................3 NOTICE ................................................................................................................................................................3 ABBREVIATIONS AND DEFINITIONS ......................................................................................................................3 RELATED DOCUMENTS .........................................................................................................................................3 GENERAL.................................................................................................................................................................5 2.1.1 2.1.2 2.1.3 The redundancy aspect................................................................................................................................6 List of HMA vessels not having communication between DP and PMS ....................................................8 Contact details.............................................................................................................................................9 Technical Description
HMA HC800
HMA-B-HC800-DP_PMS-TD-01
Page 2/9
Høglund Marine Automation AS
HMA HC800 – Technical Description
1 Introduction
1.1 Intention and scope
The intention of this document is to emphasize and support the fact that DP systems and the PMS systems should be
independent from each other rather than connected together. This document further describes in text and pictures the
use of a non-existing communication between the DP system and the PMS. At last but not least there is a list of vessels
showing the vessels delivered with HMA PMS that do not have any communication what so ever, between the DP
and PMS. These systems are working independently.
1.2 Notice
The information in this document is subject to change without notice and should not be construed as a commitment by
Høglund Marine Automation AS. HMA will not and cannot be held responsible for any changes that might occur.
Copyright © 2012 Høglund Marine Automation AS.
1.3 Abbreviations and definitions
HMA
Høglund Marine Automation AS
DP
Dynamic positioning System
PMS
Power Management System
DP
Dynamic Positioning
MTBF
Mean Time Between Failure
1.4 Related documents
Document identity
Technical Description
HMA HC800
Title
HMA-B-HC800-DP_PMS-TD-01
Page 3/9
Høglund Marine Automation AS
HMA HC800 – Technical Description
ANY
INTERFACE
REQUIERED?
Technical Description
HMA HC800
HMA-B-HC800-DP_PMS-TD-01
Page 4/9
Høglund Marine Automation AS
HMA HC800 – Technical Description
2 General
Due to the fact that some companies want to mystify this subject in order to deliver an integrated DP-PMSICAS solution, a demand for this clarification document has risen.
There is a huge misunderstanding in this subject to day.
Many engineers among ship owners and yards believe that a communication between the DP and the PMS
is crucial for a safe operation of the vessel.
This is mainly caused by lack of detailed knowledge and experience in this field.
The truth is:
NO INTERFACE FROM PMS TO DP IS NEEDED AT ALL !
How is this possible?
The only signals needed by the DP, is the power signals from each generator.
In a systems with a bus tie breaker, a connected signal from bus tie is also needed.
For many decades there have been delivered systems with the demand for generator power information. It
became a common practice to install several power transducers in the switchboard for this information.
The reason for this is that in the early days, it was each consumer that had to limit its own power and protect
the generators from overload.
Typically this have been done for propellers (pitch controlled) compressors, pumps, drilling drives, and other
large consumers.
All this consumers would get an own generator power signal for load control.
This was also the case with the first DP systems as diesel electric propulsion become more common. The
DP system got its own power converter for each generator, and in some cases also the “connect” signal from
the breaker. The “connect” signal from the breaker is not necessary, as the power signal will give a clear
indication on the status of the generator breaker, because the power signal will be above zero KW when it is
connected.
There are other PMS information that might be sent from the PMS to the DP, however most of the installed
DP systems do not need such information for operating. This information must be understood as “nice to
have” only.
Technical Description
HMA HC800
HMA-B-HC800-DP_PMS-TD-01
Page 5/9
Høglund Marine Automation AS
2.1.1
HMA HC800 – Technical Description
The redundancy aspect
The DP system is 100% dependent of the load status of the generators in order to operate.
If this information is sent to the DP system from the PMS, the total operation of the vessel is dependent on a fully
operational PMS.
Any failure of the PMS or any PMS component will be crucial for the DP, as the generator power load situation will be
uncertain.
MTBF figures for the DP will drop significantly due to the dependency of a fully operating PMS.
Technical Description
HMA HC800
HMA-B-HC800-DP_PMS-TD-01
Page 6/9
Høglund Marine Automation AS
HMA HC800 – Technical Description
The only way to maintain safe DP operation independent of PMS, is with total separation of the signal interface,
In addition to the necessary power information there are additional information that might be sent between the PMS and
the DP:
PMS to DP
•
•
•
•
Number of available generators in the system
Critical failures in a running generator
Any load limitations on the connected generators
Status of other essential consumers requesting power
DP to PMS
•
•
•
DP – out of position
Requested power
Force preference trip
All this information is optional and rarely used, and may be sent via standard I/O signals, or a simple NMEA or Modbus
line.
Technical Description
HMA HC800
HMA-B-HC800-DP_PMS-TD-01
Page 7/9
Høglund Marine Automation AS
2.1.2
HMA HC800 – Technical Description
List of HMA vessels not having communication between DP and PMS
There are hundreds of vessels in operation to day, where there is no communication between the DP and the PMS.
The following list just shows some of this vessels where HMA has been involved in delivering the PMS.
None of the following vessels have any communication between DP and PMS.
Vessel
Shipyard
Owner
Type
Crystal Sea (BW Carmen)
Aker Langsten
DOF (BW Offshore)
FPSO
Sea Launch Rig
Kværner Rosenberg
Kværner
Launch Rig
Sea Launch Ship
Kværner Rosenberg
Kværner
Launch Support Vessel
Fresnel
Ulstein Verft
Crystal Ocean
Kvaerner Govan
Brøvig
Diesel Electric Cable Layer
Bideford Dolphin
Harland Wolf
Fred Olsen Energy
Drilling Rig
Normand Cutter
Ulstein Verft
Solstad Offshore
Cable layer
Diesel Electric Offshore Vessel
Yatzy
Boelverf, Belgium
Dimond Drilling
Oil Rig
Skandi Carla
Aker Aukra
DOF
ROV IRM
Normand Clipper
Ulstein Verft
Solstad Offshore
Cable layer
Stril Poseidon
Aker Langsten
Møkster
Standby Vessel
Tulpar
Ulstein Verft
BUE Marine UK
Ice Supply
Seaway Petrel
Aker Yards, Brattvaag
Uksnøy Petrel AS
Diesel Electric Offshore Vessel
Skandi Sotra
Myklebust
DOF
Diesel Electric Offshore Vessel
Viking Avant
Aker Langsten
Eidesvik
Supply
Bibby Sapphire
Aker Langsten
Volstad
Diesel electric ROV Vessel
Strilmøy
Aker Langsten
Møkster
Diesel Electric Supply
Havila Harmony
Havyard
Havila
Diesel electric Supply Vessel
Siem Louisa
Aker Aukra
Siem Offshore
Supply
Siem Danis
Aker Aukra
Siem Offshore
Supply
SBS Typhoon
Aker Aukra
SBS Marine
Supply
Pacific Endurance
Aker Langsten
Prisco Swire Offshore
Diesel Electric Ice supply
Pacific Enterprise
Aker Langsten
Prisco Swire Offshore
Diesel Electric Ice supply
Siem Sophie
Aker Langsten
Siem Offshore
Supply
Stril Odin
Aker Langsten
Møkster
Diesel Electric Supply
Far Swan (prev Sical Torino)
Aker Langsten
Siem Offshore
Supply
Pacific Endeavour
Aker Yards, Langsten
Prisco Swire Offshore
Diesel Electric Ice supply
Lewek Atlas (ex Siem Mollie)
Aker Aukra
Siem Offshore
Supply
Siem Hanne
Aker Aukra
Siem Offshore
Supply
Ocean Protector (Skandi Bergen)
Aker Aukra
DOF
ROV
Skandi Commander
Fitjar Mekaniske Verksted
DOF
Diesel electric Supply Vessel
Bibby Topaz
Fosen Mekaniske Verksted
Volstad
Diesel Electric Offshore Vessel
Volstad Supplier
Aker Yards, brattvåg
Volstad
Diesel electric Supply Vessel
Skandi Acergy
Søviknes Verft
DOF
Offshore Construction
Volstad Princess
Aker Brattvaag
Volstad Shipping
Offshore Vessel
Skandi Salvador
Aker Promar
DOF
Offshore Vessel
Skandi Brazil
Aker Promar
DOF
Offshore Vessel
B129
Aker Søviknes
DOF
Offshore Vessel
Technical Description
HMA HC800
HMA-B-HC800-DP_PMS-TD-01
Page 8/9
Høglund Marine Automation AS
Seabed Worker
HMA HC800 – Technical Description
Fjellstrand
Multipurpose vessel
Skandi Arctic
STX Søviknes
Doftech DA
Diving vessel
Skandi Salvatore
Fittjar Mek
DOF
Offshore Vessel
Skandi Flora
Aker Aukra
DOF
Offshore Vessel
Skandi Vitoria
Aker Promar
DOF
Offshore Vessel
Atlantis Dweller
WestCon
Møkster
ROV/Diving
Lewik Atria (Trico Star)
Tebma Shipyard, India
Emas Offshore
VS470 MK2 Supply
Abyss Dweller
WestCon
Møkster
VS470 MK2
Tebma Shipyard, India
Trico Marine
VS470 MK2 Supply
West Epsilon
Seadrill
Upgrade IAS-F&G-ESD
Stril Merkur
Astilleros Gondan
Simon Møkster Shipping
VS-482.II FSV
Stril Orion
STX Søviknes
Simon Møkster Shipping
PSV
Stril Polar
STX Søviknes
Simon Møkster Shipping
PSV
SCI Pawan
Cochin
Skandi Sotra
Bergen
SCI Kundan
Cochin
BW Athena
VS470 MK2
2.1.3
Tebma Shipyard, India
AHTS
DOF
Uppgrade IAS-PMS
BW Offshore
FPSO - Upgrade Cargo Control
Trico Marine
VS470 MK2 Supply
AHTS
Contact details
Høglund Marine Automasjon AS
Carl XV`s gate 19
N-3150 Tolvsrød
Norway
Telephone: +47 33 41 41 50
Technical Description
HMA HC800
HMA-B-HC800-DP_PMS-TD-01
Page 9/9