Corporate publications

Each year Transpower publishes an Annual Planning Report which details the status of all projects that Transpower considers possible over the next 10 years.

Transpower’s Asset Management Plan (AMP) represents the intended asset management strategies and programmes of work for the National Grid infrastructure and related assets. It describes the significant ‘business as usual’ investment undertaken annually to maintain grid assets and perform minor equipment upgrades, and includes a summary of all planned operating and capital expenditure, including major grid reliability and grid investment expenditures.

This Briefing for Incoming Ministers (BIM) introduces Transpower and outlines the company's role and the key issues and challenges confronting the company.  The issues and challenges outlined include: building a platform for the future to take advantage of automation and technolgy; new transmission investment; performance of the exisiting grid and the regulatory environment.

This Compliance Statement was prepared by Transpower to demonstrate to the Commission its compliance or otherwise, with the Commerce Act (Transpower Thresholds) Notice 2008 and the Deed of Settlement at the assessment date 30 June 2009.

• Compliance Statement 2009 - covering letter to EC

This booklet provides a high level overview of the process to assess connection with investors.

The purpose of this Connection Policy is to:

Connection Requirements - set out the policy relating to and encompassing the connection requirements of the grid asset owner

Equipment Requirements - state the minimum requirements applicable to all equipment
Information Requirements - state the information which must be provided prior to connection of equipment to the grid assets and in the event of changes being made to that equipmen

This booklet is a guide to a specially protected area of Cook Strait called the Cook Strait Cable Protection Zone (CPZ). The CPZ protects vital submarine electricity and telecommunication cable links between the North and South Islands.

If you are a commercial operator or a recreational user of Cook Strait, you should read this booklet carefully.

This 12 page booklet is for those who want to learn more about the major transmission assets owned and operated by Transpower and the company's role in the New Zealand electricity industry.

It also provides the reader with some background information on the nature of electricity and how it is transported from the power station to your home.

The report describes Transpower’s financial and operational performance for the six months to 31 December 2009.

The primary focus of the Board and management is on engineering and operational performance, in order to strengthen and secure the national transmission system as a platform for economic growth.

This report describes Transpower’s financial and operational performance for the financial year ending 30 June 2009.

The surplus after tax and before net changes in fair value gain/(loss) for the year ended 30 June 2009 was $135.8 million compared with the equivalent 2007/2008 surplus of $107.7 million. The principal reasons for the rise in profit from last year, were an increase in transmission revenue and a lower impairment charge on System Operator assets.

The Electricity (Information Disclosure) Regulations 1999 form part of the Government's regulatory regime for the electricity sector. The purpose and nature of these Regulations is described in the Electricity Information Disclosure Handbook published by The Ministry of Economic Development. Transpower is covered by these regulations and is therefore required to publish the information prescribed in the Handbook.

The Investment Statement is a legal document that provides information about the role of Transpower, within the New Zealand electricity industry, and information about their potential investment into Transpower.

The Optimised Deprival Valuation (ODV) provides the value of Transpower New Zealand Limited's (Transpower's) transmission grid (system fixed assets), using optimisation and deprival techniques. The value of system fixed assets includes communications assets at their net book value. The ODV methodology provides a proxy for the market value of the grid assets in the absence of a ready market for such assets.

From April 2008, Transpower is required to use the Electricity Commission's Transmission Pricing Methodology (TPM) to allocate Transpower's revenue requirement via connection, interconnection and HVDC charges for its customers.

A copy of the TPM can be found at http://www.electricitycommission.govt.nz/rulesandregs/rules (EGR Part F, Section IV including Schedule F5). Each year Transpower determines the year specific information necessary to notify customers of their prices for the year commencing 1 April.

This is Transpower New Zealand Limited’s annual Quality Performance Report. It sets out operational data that enables Transpower’s stakeholders to make an assessment of the company’s performance against operational measures incorporated in the company’s Statement of Corporate Intent.

This statement is submitted by the Board of Directors of Transpower New Zealand Limited, in accordance with Section 14 of the State-Owned Enterprises Act 1986. It sets out the Board’s overall intentions and objectives for Transpower New Zealand Limited and its subsidiary companies for the year commencing 1 July and the succeeding financial years. 

Transmission rentals are the surplus created in the wholesale electricity market once purchasers have been invoiced and generators have been paid. Nodal pricing is used to calculate wholesale electricity prices based on marginal costs at injection and offtake points. Surpluses arise because:

• losses are priced at the marginal loss rate while loss quantities are determined by the average loss rate (which is lower than the marginal rate)
• when a constraint occurs, consumers pay for all the energy consumed at nodes “downstream” of the constraint at the (higher) marginal prices set at those nodes, but some of the energy consumed at the “downstream” nodes is generated at “upstream” nodes where the prices are lower, and generators injecting at those nodes receive those lower prices.

Each month Transpower allocates the transmission rentals back to customers in accordance with the methodology set out in Transmission Rentals (Losses and Constraints Excess Payments).

This brochure provides guidance to operating large irrigators near existing overhead high voltage power lines, and suggests ways to avoid electrical hazards.