Voltage Regulation System Handles Coal
In 1999 PWCS commenced an expansion of their Kooragang facilities to become the largest and most efficient coal handling operation in the world. This expansion included installing a further three 10MVA 33/6.6kV onload tapchanging transformers. Following a review of available voltage regulating relays the local engineering consultants chose the a-eberle REGSys system for the new transformers.
Subsequently a further 3 relays were purchased to upgrade the original units. The voltage regulators were supplied by Protection and Monitoring Systems. A significant factor in this choice was the ability to simulate the voltage regulation environment prior to installation and commissioning via REGSim software. It was thus possible to pre-determine how the regulation system would behave in response to dynamic loading including surges, fault conditions, etc and therefore maximise system reliability before going on-line.