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The North Auckland and Northland (NAaN) grid upgrade project reinforces transmission into the Auckland Region and across the harbour to North Auckland and the Northland Region. It adds new 220 kV transmission capacity to the National Grid by providing 37 km of underground cable between the Pakuranga, Penrose, and Albany substations. The project includes new grid exit points at Hobson Street (Auckland CBD) and Wairau Road (North Shore) and a cable across the Auckland Harbour Bridge. The estimated total cost of the cable aspects of the works is $415 million.〔(【引用サイトリンク】title= North Auckland and Northland Grid Upgrade Project )〕 ==Overview== The NAan project establishes a 220 kV connection between the Pakuranga and Penrose substations, and a further 220 kV connection between the Penrose and Albany substations. The Penrose to Albany section includes connections to the zone substations owned by Vector at Hobson Street in the Auckland CBD, and Wairau Road in the North Shore, and establishing new grid exit points at both of those locations. The 220 kV circuit from Pakuranga to Penrose: * increases capacity to the Penrose substation by adding a third 220 kV circuit alongside the existing 220 kV Otahuhu–Penrose double-circuit line * adds to the security provided by the Whakamaru to Brownhill Road transmission line (known as the North Island Grid Upgrade or NIGU project), increasing the diversity of transmission from the south into the Auckland region by establishing a 220 kV transmission connection from Pakuranga to Penrose. The 220 kV circuit from Penrose to Albany: * increases capacity to the Northland region (including the North Isthmus) by adding a third 220 kV circuit to the existing 220 kV double-circuit line from Otahuhu to Henderson * builds on the NIGU project and increases the diversity for transmission from the south into the Northland region (including the North Isthmus), by establishing 220 kV transmission from Pakuranga, through Penrose, to Albany * provides capacity and security to Vector‘s Hobson Street and Wairau Road substations through a 220 kV connection to the Albany–Penrose circuit, and enables Vector to redistribute load from existing grid exit points, particularly the Albany 33 kV and 110 kV (Wairau Road) loads and Auckland CBD loads. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「North Auckland and Northland grid upgrade project」の詳細全文を読む スポンサード リンク
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