Wellington Electricity

[4] The majority of electricity used in Wellington is taken from the national grid at Transpower substations located at Upper Hutt (Birchville), Haywards, Melling, Gracefield, Pāuatahanui, Takapu Road (to the east of Linden), Kaiwharawhara, Wilton and Central Park (Mount Cook).

The network also receives up to 12 MW of electricity from power generating facilities connected to the distribution network, including two landfill gas stations at Silverstream and Happy Valley, a gas fired cogeneration facility at Wellington Hospital, and a single wind turbine in Brooklyn.

A major project was completed in 2012 to replace 33 kV underground cables that supply part of the Wellington Central Business district.

[5] The Wellington Electricity 2016 Information Disclosure reported the performance of the network for the 2015/16 year as follows:[6] This level of network performance means that average consumer typically experiences a power outage lasting 55 minutes once every 20 months.

However, Wellington is subject to severe storm events and high wind gusts that can cause extensive interruptions for some consumers.