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Sensonics Meet the Challenges of Cruachan Power Station Upgrade

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Sensonics Meet the Challenges of Cruachan Power Station Upgrade
Sensonics Meet the Challenges of Cruachan Power Station Upgrade
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Sensonics
Northbridge Rd
Berkhamsted Hertfor, HP1 1EF
United Kingdom



Press release date: February 1, 2011

Turbine Instrumentation specialists SENSONICS have recently completed the retrofitting of two static digital excitation systems at Cruachan power station in Scotland. Contracted by Scottish Power for the Unit 3 and Unit 4 upgrade, Sensonics worked closely with Optimised Systems and Solutions (OSyS) to replicate the equipment fitted to Unit 1 and Unit 2 during previous works.

Constructed in the early 1960's, Cruachan Power Station is one of only four pump storage facilities in the UK and due to it's location presented a number of unique challenges to Sensonics. The power station is completely concealed within the hollowed out rock under Ben Cruachan and houses four generator / motor sets driven from an upper reservoir which are capable of generating 400MW of electricity. The station can produce electricity for the grid in less than 2 minutes when demanded and the need for high integrity turbine control systems is essential to meet these operational requirements.

The original AVR offered no hardware redundancy and with spare parts becoming obsolete, the reliability and availability was becoming of major concern. The new system has been designed to offer extremely high availability by utilising separate and diverse digital controller hardware in combination with dual thyristor bridges providing 100% full redundancy. These are all backed up by duplicate power supplies and independent protective trips. A power system stabiliser was also included in the software algorithm to ensure Grid Code compliance.

For the Unit 3 and 4 equipment, Scottish Power contracted Sensonics to provide the same Optimised Systems and Solutions equipment configuration which were fitted to Units 1 and 2 in 2002. Sensonics managed the entire project on a 'turnkey' basis in terms of mechanical design, manufacture, factory testing and installation, through to commissioning the entire system in conjunction with the OSyS engineers.

The successful upgrading of the AVR equipment at Cruachan Power Station is another example of Sensonics position as a leading supplier of high integrity systems for turbine supervisory, control and protection applications, even in the most demanding environments.

Russell King, Managing Director at Sensonics commented. 'The partnership with OSyS to deliver this critical turbine system to Scottish Power utilised the OSyS technology and expertise in combination with Sensonics turn key project capability. Working closely with Scottish Power to develop the safe working systems and appropriate procedures to deliver this project half a mile under a Scottish mountain was a real challenge. The project timeframe and working environment were particularly demanding and the retrofit activity was successfully completed within the requested 4 week period.'

Further details are available from: Russell King, Sensonics Ltd, Berkhamsted, Hertfordshire, UK. Tel: +44 (0) 1442 876833.Fax: +44 (0) 1442 876477 Email: sales@sensonics.co.ukwww.sensonics.co.uk

Case Study-Application PR issued for Sensonics Ltd by: Andrew Harvey - Harvey Communications Tel: +44 (0) 1342 714447 Fax: +44 (0) 1342 713233 Email: admin@harveycomms.co.uk www.harveycomms.co.uk
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