Planning for Projects
Investment Approvals Process
The Investment Approvals Process (IAP) is the decision-making framework for preparing investment proposals to meet Transpower’s plans for its grid. It is adaptable to the range of investment situations that arise - large and small value proposals with many or few options. Transpower’s stakeholders can be confident that the investment and delivery decisions are driven by verified need and are efficient, appropriate and defensible.
Investment Approvals Process [411kB]
Investment Tools
Transpower has a number of tools available to increase capacity in its network, including:
- Grid support contracts
- Squeezing capacity out of existing assets by way of:
- thermal upgrades (pdf: 61KB) (i.e. increasing the operating temperature of assets to allow more current to pass)
- reconductoring, (i.e. replacing conductor on lines with larger capacity conductor)
- duplexing (i.e. adding a conductor to the existing conductor for each phase)
- or installing reactive support (like capacitors or static var compensators which are helpful in maintaining voltage stability)
- Building new infrastructure like new lines and substations