The implementation and evolution of a SCADA system for a large distribution network

The Public Utilities Board of Singapore has procured and put into service a SCADA system for its 22 kV distribution network. The SCADA system was commissioned and became operational in mid 1988. Due to the continuous network expansion and increasingly higher expectations of the customers for a reliable supply, the system has been constantly undergoing extensions and upgrading to incorporate more remote terminal units (RTUs) as well as improved functional enhancements. The authors present the approach adopted in implementing the SCADA system and the benefits accrued through incorporating such a system. They also describe the subsequent development of integrating a real-time expert system to the SCADA system in preparation for the next steps in the progressive automation of the 22 kV distribution network