Transmission & Distribution Technology
Substation boom in wake of transmission and distribution contracts
Growing investment in transmission and distribution networks to meet the demands of expanding populations also means demand for – and investment in – new substations. Eugene McCarthy reports.
La creciente inversión en redes de transmisión y distribución para satisfacer las demandas de la expansión de la población también significa una demanda de nuevas subestaciones e inversiones, afirma Eugene McCarthy.
Steigende Investitionen in Übertragungs- und Verteilernetze zur Erfüllung des Bedarfs einer wachsenden Bevölkerung erfordern auch neue Umspannwerke und ziehen somit weitere Investitionen nach sich. Eugene McCarthy berichtet.
A
lstom has been awarded a contract to supply a synchronous condenser for transmission grid operator TenneT. Tis
technology generates adjustable reactive power to ensure the grid stability needed due both to the upcoming closure of Grafenrheinfeld nuclear power plant in 2015, and the ever-increasing reliance on intermittent renewable energies. It will be installed in the new transformer station in Bergrheinfeld West in southeast Germany. Te project is set to be complete by the end of 2015 (Fig. 1). Alstom’s scope covers the supply of
a 400MVA Topair generator adapted for synchronous condenser operation to produce adjustable reactive power (+250MVar/-175MVar), along with all the required auxiliary systems. In addition, Alstom will prepare the 150,000m2 site for the new transformer station, and supply three air-insulated 380kV substations, a generator transformer with an output of 300MVA and a generator power switch.
Next door in Austria, Austrian Power Grid has awarded Pöyry with a project for the construction of new 380/110/30kV switchgears at Kaprun substation. Te deal includes detailed design engineering, project management and installation services as well as the supply of equipment. Dismantling of the existing 220kV switchgear and installation of the new components will be managed step by step, in close cooperation with Austrian Power Grid. Te project has just commenced and will be completed by the end of 2016. Kaprun substation is situated near Zell
am See in the province of Salzburg. Tis project provides the direct integration into the 380kV transmission grid by means of a 380kV gas-insulated switchgear (GIS), two 380/110kV power transformers (300MVA each) and a 380kV interconnection towards Tauern substation. Units three and four of Kaprun pump storage power plant, owned by Verbund Hydro Power, will be linked to the new 380kV level. Also included is the partial upgrading and modernisation of the existing 110 kV switchgear as well as the modernisation of the local 16 kV distribution grid coupling. Te project will be completed after deconstruction of the obsolete 220kV switchgear. In US news, Jersey Central Power
& Light (JCP&L) has completed a US$2 million (£1.2 million) substation upgrade in Wrightstown to enhance customer service reliability and help meet the growing demand for electricity in Burlington County.
Te upgrade included installing two
five tonne, 230 kV circuit breakers and connecting them to existing substation
Fig. 1. The synchronous condenser generates adjustable reactive power to ensure grid stability.
www.engineerlive.com 9
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