The Electricity Commission is expected to approve two grid investment proposals that would improve electricity reliability in Wellington and Wairarapa.
The projects, proposed by Transpower, are worth nearly $27 million.
A new $9.5 million transformer would be installed at the Wilton substation, which the commission says is a relatively small upgrade.
Conductors on the existing Woodville to Mangamaire and Masterton line would also be replaced, at a cost of $17.4 million.
Work in both areas would be completed by 2011.
