Summary
The report describes the transmission and distribution developments in Singapore for the past 25 years up to approximately 2014.
In Singapore, approximately 1.3 million electricity consumers are supplied through high voltage, transmission network comprising 400kV, 230kV and 66kV cables which are wholly underground and lower-voltage distribution network comprising 22kV, 6.6kV and 400V cables, which are 99% underground.
An international benchmark study for the electricity industry spanning 26 global cities in 2006 shows that Singapore has one of the world’s best performing electricity networks. According to this study by KEMA International, Singapore has the lowest duration of electricity outages per customer per year based on the System Average Interruption Duration Index (SAIDI = 0.5 minutes per customer) and the least number of outages per customer per year based on the System Average Interruption Frequency Index (SAIFI = 0.01 incident per customer per year).
Singapore with 6.8GW of demand is supplied by fifteen 230kV/66kV substations with an estimated total network capacity of 16900MVA. In comparison, Toronto in Ontario, Canada with 6.0GW of demand is supplied by 4 supply points via 23 transmission circuits at 230kV level with a total network capacity of 13861MVA. The installed network capacity per maximum power delivered for Singapore and Toronto are therefore 2.485MVA/MW and 2.310MVA/MW respectively.