Case Study 1: Alice Springs
The Alice Springs Electricity Supply system is a small autonomous network supplying a
population of approximately 30,000 residential and commercial customers and with a load
in the range of 15 MW to 55 MW and averaging around 26 MW. It is supplied by three
centralized power generation stations consisting of a total of 19 primarily gas-fired
generators, with a network of high-voltage (HV) sub-transmission and distribution feeders
feeding an LV distribution system, all of which mainly supply electricity to urban
customers. As such, the Alice supply system has particular operational characteristics that
can be different than those of large interconnected electricity supply systems primarily
because it has far fewer and smaller generators and loads spread throughout a relatively
small network. In particular, the Alice system experiences a wider range of system
operating frequencies both during normal system operation and during system events