Newfield Peninsula Chermingat A
The Newfield Peninsula Chermingat A Platform is POWER BACK UP by DC Power Supply System built by Swift Energy.
The new satellite platform built and operate by Newfield Peninsula Malaysia is located offshore Terenganu, West Malaysia.
The complete platform power supply demand is met with Thermal Electric Generator which generates 24VDC supply. In order to maintain continuity of supply to the equipment operating on the platform, a DC Power Supply System with the following configuration as designed and supplied by EPCC fabricator, Oilfab Sdn Bhd:
- 2 x 100% Battery Charger (3 phase input, 50Hz rated at 100A@24Vdc) installed in IP65 Ex d SS316L Enclosure with the AC source supply from a 20KVA Portable Generator.
- 2 x 1000AH@24VDC VRLA Battery installed in IP56 SS316L Ex e Battery Box to provide 3 days autonomy back up capacity.
- 2 x 150A Battery Isolating Switch in IP65 EE x d SS316L Enclosure d) 1 x 24VDC Ex de IP65 Distribution Board.
The project is completed on time in April 2007.
Solar Power System
Solar energy is perhaps the most popular alternative renewable energy source in the world. Both the commercial and private sectors are showing increased interest in solar power generation.¬†
The main attractive features of the solar power system are:-
- renewable energy, no fuel required
- high reliability
- easy installation and the modularity of system
- no moving parts
- possibility of decentralization of generators
- simplicity of the system, ease of maintenance
- low running cost
The Erb West field and Tembungo offshore platform located in South China Sea off the coast of Sabah consists of integrated productionÔľĆprocessing and well head platform which requires uninterrupted continuous supply for the instruments. The Solar Power System was designed by Swift Energy to replace the existing system produce continuous output of 24Vdc to supply the instrument loads in 8 hours/day. The daily consumption is about 208W. A General alarm has to connect to the client‚Äôs SCADA system to report the failure of the system.¬†
The Solar Power System had to fit the existing space allocated which was the main constraint for the new system. An extended platform is required to ensure the solar panel receive the maximum sunlight and avoid the collision between the new solar panel and the existing. Total of 10 units of solar panels with size of 2550 x 2790mm are compact and fit precisely to the allocated space. The increased safety EEx e battery box managed to fit under the shed of the solar panel to avoid excessive high temperature of battery cells. ¬†
The Solar Power System consists of 3 main components:-
Both solar array panel and battery connected to the master controller to supply to the load. During day time, solar panel will supply to the load besides charging the battery. Controller‚Äôs main task is to monitor and control the solar power system, protect the battery against overcharge by the solar panel and excessive discharge by the load. Battery bank will only supply to the load during night or periods of low insolation¬Ļ. A low voltage pre-warning alarm and load disconnected alarm from master controller will alert the operations team during to any of these alarms. ¬† ¬† ¬† ¬† ¬† ¬†
- solar array panel
- master controller
- battery banks
Detail calculation was carried out to obtain the preliminary size (electrical and physical) of the Solar Power System. Some basic assumptions were made:-¬†
- End of cell voltage used for battery is 1.8V per cell and Depth of Discharge shall be 80%
- Battery ageing factor and battery temperature de-rating factor, battery autonomy,
- Solar array panel efficiency, albedo¬≤ effect, losses due to dust accumulation and diffuse percentage of insolation
The ATEX certified Zone 1 solar module can charge a 12V battery using a charge regulator. The glass fibre reinforced polyester junction box provides a high quality, dust and watertight IP66 rated housing and fitted with 2 EEx e M25 cable glands to connect the solar array in series and strings to deliver output of 24Vdc or higher in this system. The solar array support is supplied in Stainless Steel 304 or 316L which suitable for offshore application and withstand maximum continuous wind-loading 150km/hr. ¬†
Indicator LEDs in front of the master controller indicate the present of the external power supply to the controller, battery charge mode, sub-array disconnected condition, pre-warning low voltage and load disconnect in abnormal situation. The master controller also has a test switch to simulate a high or low battery voltage during maintenance period. The potentiometer is calibrated to the neutral position 2.37V/cell to adjust among both float and boost charge voltage setting.¬†
The Valve Regulated Lead Acid batteries that are installed in an EEx e battery box offer an excellent performance at 932.0Ah to supply to the load during the night or days with no or low solar insolation for 5 days. The lead acid battery permits the daily depth of discharge to 20%. Battery temperature will be continuously monitored through the temperature sensor in the battery box and cut off the battery load if high temperature found.¬†
The Solar power system supplied by Swift Energy is designed, constructed and tested for the best performance. We subject our system to rigorous testing to assure long term reliability and continued power production without any failure. This system is vital to provide continuous supply especially for unmanned and hazardous area. A complete solar solution from design, installation, and commissioning, training and technical support service by us will ensure the system work seamlessly with your utility power supply.¬† ¬†
By integrating a highly reliable solar power system, Erb West field and Tembungo offshore platform has a secure un-interrupted continuous power supply to the Test Separator Metering System. The uninterrupted availability of data transmitted by the metering system is essential to the operations and efficiency in the production.¬†
SWIFT ENERGY PTE LTD
629, Aljunied Road, #06-16
Cititech Industrial Building
Tel: +65 6846 8831
Fax: +65 6846 8839
Mobile: +65 97887759 (George Koh )
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