In August NETcon completed stage one of an upgrade of Alpine Energy’s electrical zone substation in Pleasant Point.
The substation has been equipped with connection points for a mobile substation. A mobile substation is a fully equipped electrical substation which is mounted on a trailer and can be easily moved to the required location. It can be used to bypass a substation during maintenance work and also be put in service in emergency situations caused by accidents or weather events.
To prepare for the Alpine Energy mobile substation connection in Pleasant Point the 33kV line between Timaru and Pleasant Point was switched off. Two trailer mounted generators were used to boost the 11kV line for Pleasant Point and surrounding areas to provide continuous electricity supply. Trenches had to be dug at the Pleasant Point yard to redirect cables for the new connection points of the mobile substation.
During the same outage NETcon carried out maintenance work at the Timaru zone substation on the Pleasant Point and Pareora circuits.
Several months of planning and preparation resulted in a successful operation between Alpine Energy and NETcon. Over 20 staff from NETcon’s distribution and technical teams were involved in this project. Zone substations in Fairlie and Tekapo have been setup for mobile substations in previous years. These setups provide greater flexibility for maintenance work in the Alpine Energy network and will reduce power disruptions to the community.