The three 220kV/66kV transformers at WMTS have reached the end of their useful life. Most of the 220kV and 66kV switchgear equipment within the station is also reaching the end of their technical lives. Zinfra was engaged by AusNet to rebuild the 220kV and 66kV switchyards as well as replace the three 220/66kV transformers with three new 225MVA transformers.
The completion of the WMTS rebuild includes the fit out of a new control room with over 50 protection panels, 220kV, 66kV and 22kV protection works, rebuild and modification of the 220kV, 66kV and 22kV yard, testing and commissioning and civil works.
Each of these substation rebuilds form part of an overall program of works called Project Edison, aimed at replacing ageing assets and upgrading capacity at BTS, RTS and WMTS. WMTS in particular supplies approximately 55% of the CBD. All three terminal stations remain fully operational throughout the works. These factors have made the Edison Project one of Melbourne’s most critical and complex infrastructure projects due to the technical expertise needed and the number of delivery and community partners involved.