Satelite Image of Bonny Island

PRISMIC® Power Management Systems at Bonny Island, NigeriaIntroductionBonny Island is situated at the southern edge of Rivers State in the Niger Delta of Nigeria. In the early 1990s the Federal Government of Nigeria, in collaboration with 3 international partners, Shell Gas BV., CLEAG Limited (ELF) and AGIP International BV. started the multi-billion dollar project to create Nigeria Liquified Natural Gas (LNG) Limited.

Engineering consultants acting on behalf of Nigeria LNG recommended BRUSH to provide a reliable and bespoke Power Management System for their existing and new power generation plant.

The PRISMIC® PMS was required to control the voltage, frequency, watts and VArs of the on-site generators and operate as a single panel unit with a local and a remote desk HMI for the operator interfaces. A serial communications link using MODBUS RTU protocol to a third party monitoring system was also included for bi-directional data gathering.

The initial installation and commissioning of this system was successfully carried out. The PMS was soon called upon during operation under a live scenario. Load shedding prevented a power blackout and the PMS continued to control the electrical plant as 2 independent power systems.

The successful operation forged positive relationships and confidence for future business. Nigeria LNG had no hesitation in using the PRISMIC® PMS as their ongoing Power Management solution for their rapidly expanding LNG and power generation plant,

System DescriptionThe evolution of the LNG plant and power generation projects is summarised below along with the PRISMIC® PMS modifications necessary to maintain the reliable management of the power system.

Base Project3 generators and 1 sub station operating without a PMS.•

Expansion Project (2000)Existing 3 generators and 3 new generators.• Second 33kV sub station added.• PRISMIC• ® PMS installed to control and monitor the power system.Simulator provided for on site operational support and training.•

Plus Project (2004)2 new DLN generator sets added.• Third 33kV sub station added.• Second PMS panel with HMI added, in a remote location with serial communication links • to the existing PMS panel.PRISMIC• ® PMS hardware modified for dual redundant processor functionality.Complex control software included to control the DLN sets.• Software modified to include the additional loads and circuit breakers on the expanding • power system.

Six Project (2006)2 new generator sets added.• New bus section added to third 33kV sub station.• Software modified to include the additional loads and circuit breakers on the expanding • power system.Special load inhibit software added for large compressor loads.•

132kV Project (2007)132kV sub station with 6 transformer links to the 3 existing 33kV sub stations added.• Third PMS panel with HMI added in the 132kV sub station with communication links to the • existing PMS panels.Upgraded the PMS communications infrastructure to a dedicated managed fibre optic loop • configuration across all the PMS, utilising deterministic ethernet protocol.Time synchronising added via an NTP Server interface connection.• Software modified to include the additional loads and circuit breakers on the expanding • power system.Special hybrid topology software included to assist phased installation of the electrical plant • thus reducing the number of software alterations and changes.

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PRISMIC® PMS Panel During Commisioning

PRISMIC® Power Management SystemBonny Island, Nigeria

BRUSH The Netherlands

07/2009SM0000296A

BRUSH SEM s.r.o.Edvarda Benese 39/564301 00 Plzeň, The Czech RepublicTel: +420 37 8210111Fax: +420 37 8210214Email: prismiccz@brush.euWeb: www.brush.eu

BRUSH Electrical Machines LtdFalcon Works, Nottingham Road,Loughborough, Leics. LE11 1EX EnglandTel: +44 (0)1509 611511 Fax: +44 (0)1509 610440E-mail: prismicuk@brush.euWeb: www.brush.eu

BRUSH HMA b.v.PO Box 3007, 2980 DA RidderkerkThe NetherlandsTel: +31 180 445500Fax: +31 180 445566Email: prismicnl@brush.euWeb: www.brush.eu

BRUSH Turbogenerators Inc.15110 Northwest Freeway, Suite 150,Houston, Texas 77040, USATel: +1281 580 1314Fax: +1281 580 5801Email: prismicus@brush.euWeb: www.brush.eu

BRUSH TurbogeneratorsWorld Trade Tower, Suite 1803,500 Guangdong Road, Shanghai,P.R.ChinaTel: +86 21-63621313Fax: +86 21-63621690Email: prismiccn@brush.euWeb: www.brush.eu

BRUSH TurbogeneratorsPO Box 111209, Abu Dhabi,United Arab EmiratesTel: +971 4362 6391Fax: +971 2550 1920Email: prismicme@brush.euWeb: www.brush.eu

BRUSH TurbogeneratorsLot 7 Jalan Majistret U1/26 HicomGlenmarie Ind. Park, 40150 ShahAlam, Selangor DE, MalaysiaTel: +60 (0) 3 7805 3736Fax: +60 (0) 3 7803 9625Email: prismicmy@brush.euWeb: www.brush.eu

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System DescriptionThere are three intelligent PRISMIC® PMS control units installed at Bonny Island that are interconnected via Ethernet over a fault tolerant fibre optic ring. The PRISMIC® PMS is required to operate as a single unified system when all the control units are interconnected and able to control the individual stations when they are running islanded. All of the individual PMS units can perform master control of the system depending on the state of the fibre optic communications bus, leading to a highly reliable, multi-redundant system.

The site has three local human machine interfaces (HMI) and one remote HMI. Each HMI allows full control of the entire system allowing any alarms within the system to be rapidly resolved. All manually initiated commands are controlled according to a comprehensive password hierarchy.

BRUSH supplied the Bonny Island site with a PRISMIC® PMS simulator that allows training of operators without any effect on the live system. Using an identical configuration to the actual Bonny Island PMS, it provides a safe environment for swift PMS training where multiple scenarios can be replicated without serious consequence. The simulator is also used to test each stage of the PMS software before installation onto the live system.

The PRISMIC® PMS has provided a robust, reliable and scalable Power Management System solution, bringing major benefits to Nigeria LNG. Reliability and security of the electrical power system has ensured that their critical processes and operations are undisturbed with significantly reduced power outages. This has increased the plant uptime and the ease with which the entire system can be monitored and controlled.

Equipment Controller by PRISMIC® PMS10 Turbine/Generator sets (Totalling approximately 350 MW generation capability)• 6 33/11kV transformer tap changers.• 110 loads• Control and monitoring of over 183 circuit breakers.• 122 motors.• 6 transformers.• 18 bus sections.•

Key PointsFrequency and real power control via engine governors.• Voltage and reactive power control via generator AVRs on a per sub-station basis.• Interaction with tap changer control system• Fast acting load shedding in the event of a generator or interconector CB tripping.• Gradual overload load shedding due to excessive increase in load demand.• Under frequency load shedding.• Load shedding of appropriate loads in the event of a transformer overcurrent.• Load start inhibits to prevent loads being started during periods of insufficient • spinning reserve and when there is insufficient power capability for larger compressor loads.Turbine power capability based on the fuel type and ambient inlet temperature • enabling use of realistic power capability values for all the PMS calculationsInterconnector and bus tie synchronisation.• Control logic for DLN sets.• Setpoint load control for turbine water wash facility.• Numerous status monitoring alarms•

For further information on the BRUSH PRISMIC® Power Management Systems please visit our website: www.brush.eu

Alternatively please contact your local BRUSH PRISMIC® sales team.

LNG Tanker Approaching Bonny Island

Bonny LNG Plant

On Site

Bonny Loading Jetty

Bonny LNG Plant