Transmission & Distribution Technology
Fig. 1. The valve hall of the 500 MW back-to-back HVDC system that will power up to 180,000 homes in India and Bangladesh.
Interconnectors improve integration
Around the world, cross-border interconnector technology is helping countries to even out their electricity usage and improve efficiency. Sean Ottewell reports.
La tecnología de interconectores transfronterizos está ayudando a nivel mundial a los países a igualar su uso de la electricidad y mejorar el rendimiento. Informa Sean Ottewell.
Weltweit gleichen Länder durch grenzübergreifende Stromverbünde ihren Energieverbrauch aus und steigern die Effizienz. Sean Ottewell berichtet.
I
n February the first cross-border power interconnection between Bangladesh and India was completed. Te 500MW, back-to-back high-voltage direct current (HVDC) system will power up to 180,000 homes and is capable of future expansion to 1000 MW (Fig. 1). Te initial contract was awarded in March
2011 by Power Grid Company of Bangladesh (PGCB) to Siemens. Te first 175MW of power flowed from India to Bangladesh in September last year. Tis is the first such electricity grid interconnection among South Asian Association for Regional Cooperation (SAARC) countries. Te system links India’s eastern electrical
grid to Bangladesh’s western grid. Te HVDC station in Bangladesh is connected to the
country’s existing 230 kV grid. A new 400 kV alternating current high-voltage overhead line provides the cross-border connection to the 400 kV substation in India. Tis project also enables Bangladesh’s power generation from less inefficient diesel power plants to be reduced, helping the country to lower emission levels.
Converter stations Siemens has also completed the EstLink 2 project, an HVDC link consisting of converter stations in Anttila, Finland, and Püssi, Estonia. Power is now transmitted by the customers, Fingrid – the transmission system operator in Finland, and the Estonian transmission system operator Elering. Te new link increases the power
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