The Electricity Company of Ghana (ECG) are responsible for the distribution of electricity in the southern part of Ghana, namely the Ashanti, Central, Eastern, Greater Accra, Volta and Western Regions. They are owned by the government of Ghana and operating under the Ministry of Energy (ME).
ECG provides electricity to 2.5 million customers with peak demand delivered through a power distribution network consisting of 48,439km of 33kV, 11kV and low voltage overhead distribution lines.
ECG required an automation programme to focus on reducing electricity revenue losses, improving overall efficiency, minimising customer outages and reducing operational and maintenance costs.
The first phase entailed automating 33kV radial overhead feeders across the regions of Bogoso and Tokuse, in addition to parts of the 11kV underground network in the capital city of Accra for the electricity distribution operator ECG.
• Functionality over tough terrain
• Automated field devices that are remotely controlled
• Integration and technical training
Lucy Electric installed a variety of automation products and systems to meet these objectives and these included:
• Standalone GEMINI-SCADA package
• GEMINI-DC (Data Concentrators) to integrate the secondary RTUs into the existing DMS / SCADA systems
• Automated field devices such as the remotely controlled 33kV air break switch disconnectors (RAPIER RX-RC36) complete with fault passage indicators and retrofit RMU actuators with interfacing GEMINI-RTUs / communication modems
• High power radio communication links incorporating “store and forward” techniques at repeater locations to enhance the distances covered
• In-house system design, integration and technical training services.
The six month project encompassed the design, manufacture and delivery of the equipment to Ghana from the UK. Two representatives from ECG attended an intense training programme in the UK to gain a thorough understanding of the systems employed in this project.
The installation of radio repeaters at strategic locations along the network provided an ideal solution ensuring that communication functioned correctly over tough terrain such as rocky and jungle areas.
This was helped by successful design, manufacture and delivery of power and distribution equipment to ECG.
Lucy Electric has since secured a further substantial contract with ECG to extend the benefits of automated distribution networks to other parts of Ghana.