Video | Agriculture | Confidence | Economy | Energy | Employment | Finance | Media | Property | RBNZ | Science | SOEs | Tax | Technology | Telecoms | Tourism | Transport | Search


Proposal to upgrade HVDC link submitted to Commisn

Half-billion dollar proposal to upgrade inter-island HVDC link submitted to Electricity Commission - 03 Oct 2005

Transpower has submitted to the Electricity Commission an investment proposal for increasing the capacity of the high voltage direct current (HVDC) link between the South and North Islands.

The intention is to increase the maximum capacity of the HVDC inter-island bipole link from 1040 megawatts to 1400 megawatts, by 2010. The estimated capital cost of the project in current dollar terms is $520 million.

The work will involve the decommissioning and replacement of the 40 year old mercury arc valve technology associated with Pole 1 of the bipole link. This equipment is located at the Benmore substation in the South Island’s Waitaki Valley, and at Haywards substation near Wellington.

Pole 1 will be replaced with a new 700 MW thyristor pole, similar to the Pole 2 equipment commissioned in 1991. The project also involves the laying of two additional submarine cables across Cook Strait.

Transpower Chief Executive Dr Ralph Craven says the original mercury valve equipment commissioned in 1965 has served New Zealand well, but is now the last remaining technology of its type in use anywhere in the world.

“The HVDC link is a vital part of Transpower’s network, enabling a national electricity market and efficiently balancing power supply and demand between islands for the benefit of all New Zealanders. It is also a sustainable alternative to the increased generation that would otherwise be required in both the North and South Islands. However, it needs to be a reliable link, and the 40 year old mercury-based technology associated with Pole 1 is progressively falling short of the reliability and availability standards that we require of a 21st century power system.”

Dr Craven says the documentation provided to the Electricity Commission summarises the work Transpower has done on the project to date. It includes the reliability and economic imperatives for the investment and a cost-benefit analysis of having the 1400MW capacity in service by 2010.

The HVDC upgrade proposal is part of the first Grid Upgrade Plan (GUP) that Transpower is submitting to the Electricity Commission.

The GUP also includes the North Island 400 kV Project (which was initially submitted to the Commission in May 2005), a comprehensive plan for asset management and operation of the grid, and information on contracted investments. Transpower is currently finalising a further volume of the GUP, detailing an extensive programme of regional upgrades.


© Scoop Media

Business Headlines | Sci-Tech Headlines


Reserve Bank: Policy Lessons From A Year Of Covid-19

The Reserve Bank of New Zealand – Te Pūtea Matua was in a sound position to continue to meet its mandate in the face of the COVID-19 induced economic shock. However, we must continue to transform so as to remain relevant and effective in addressing longer-term challenges, Reserve Bank Governor Adrian Orr said... More>>

Transport Industry Association: Feb 2021 New Vehicle Registrations Strongest On Record

Motor Industry Association Chief Executive David Crawford says that the February 2021 figures are the strongest for the month of February ever. Registrations of 12,358 were 8.0% up on February 2020. Year to date the market is up 7.1% (1,735 units) compared to the first two months of 2020... More>>

Paymark: Lockdown Equals Slowdown For Some

The three days of lockdown for Auckland earlier this month made a clear impression on our retail spending figures. While only Auckland moved into Level 3 lockdown, the impact was felt across the country, albeit at different levels. Looking at the ... More>>

Infrastructure Commission: Te Waihanga Releases Report On Water Infrastructure

The New Zealand Infrastructure Commission, Te Waihanga’s latest discussion document highlights the importance of current reforms in the water sector. Its State of Play discussion document about water infrastructure is one of a series looking at the ... More>>

OECD: Annual Inflation Picks Up To 1.5% In January 2021 While Euro Area Records Sharp Increase To 0.9%

Annual inflation in the OECD area picked up to 1.5% in January 2021, compared with 1.2% in December 2020. Following a rebound between December and January, the annual decline in energy prices was less pronounced in January (minus 3.9%) than in December... More>>

Hemp Industries Association: Could The Next Team NZ Boat Be Made Entirely Of Hemp?

With The America’s Cup due to start in a few days’ time, innovators from a very different sphere have been wondering how long it could be before New Zealand could be competing in a boat entirely built from hemp, with the crew eating high-energy, nutritious hemp-infused foods and wearing high-performance hemp kit..? More>>

ACT: Matariki Almost A Half Billion Dollar Tax On Business

“Official advice to the Government says an extra public holiday at Matariki could cost almost $450 million,” ACT Leader David Seymour can reveal. “This is a perfect example of the Prime Minister doing what’s popular versus what’s responsible. ... More>>

Genesis: Assessing 6,000 GWh Of Renewable Generation Options For Development By 2025

Genesis is assessing 6,000 GWh of renewable generation options for development after starting a closed RFP process with 11 partners. Those invited to participate offer a range of technologies as Genesis continues to execute its Future-gen strategy to ... More>>