Hitachi Energy reduces rail grid connections
Static frequency converters will cut Lithuania’s rail grid connections from 14 to 7, lowering costs and emissions across the 377 km corridor.
Image credit: Karolis Kavolelis / Shutterstock_2135875245
Lithuania: Lithuanian Railways (LTG) is electrifying its most important 377 km rail corridor, connecting Vilnius with the port of Klaipeda. The project will replace diesel locomotives with electric trains, reducing CO2 emissions by 150,000 t annually and cutting operating costs by 40 %.
Traditionally, rail electrification requires multiple transformer substations, which can be costly and cause voltage imbalances. Instead, LTG has adopted Hitachi Energy’s static frequency converter (SFC) technology, which will reduce the number of grid connections required from 14 to 7. This translates into significant savings in both capital and operating expenditure.
The solution, supplied to Spanish company ELECNOR and its consortium partner Inabensa, includes eight pre-assembled and pre-tested SFCs from Hitachi Energy’s factory in Turgi, Switzerland. Unlike conventional substations, the converters eliminate voltage imbalance, ensure compliance with strict grid codes, and allow the use of medium-voltage distribution grids instead of higher-cost transmission grids.
In addition to stabilising catenary voltage, the SFCs remove the need for neutral zones between power sections, extending section lengths and improving reliability. The system could also allow LTG to provide grid stabilisation services, creating new revenue opportunities.
Once completed, the electrified line will carry three-quarters of Lithuania’s rail freight and two-thirds of passenger journeys, strengthening the country’s transition to cleaner, more efficient transport.
Source: Hitachi Energy
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