Scaling down a small island control and distribution system for use as a Microgrid power solution in Africa

By T Spearing, Lucy Electric, United Kingdom, and R St John, Lucy Electric, South Africa

 

Published in:

Electricity+Control, November 2015 (pages 14 – 17)

Enquiries: Email tim.spearing@lucyswitchgear.com

 

Read the full article on Scaling down a small island control and distribution system for use as a Microgrid power solution in Africa in PDF format.

 

The project in the Caribbean was to design and implement a control system to manage the distribution of power and to improve the quality of service on the existing 11 kV network supplying small industry, hotels and residences. The overall size of the island is approximately 29 km long by 8 km wide. The island had a peak demand of approximately 40 MW which was on a small grid supplied from a single power station, comprising 10 diesel generators and 12 feeders. The power was distributed throughout the island via more than 60 secondary substations, of both ground mount and overhead design. The generators were managed by their own control system but there was no means of monitoring and reporting the performance to the end user. Equally, there was no remote control of the electrical plant on the 11 kV distribution network.

 

The project involved installing a Supervisory Control and Data Acquisition (SCADA) system at a centralised control centre to manage the outgoing feeders from the primary substation, and to monitor and control selected switchgear on the secondary distribution feeders.

 

Take note

 

  • This project in the Caribbean involved installing a SCADA system at a centralised control centre.
  • It provided immediate benefits to the system operator by enabling monitoring and controlling of the electrical distribution network.
  • It also laid the foundations for allowing planning and more effective connection of distributed generation and renewable energy resources.