Statnett Transforms System Security

摘要

To improve reliability, the contingency plans of the Norwegian TSO now include spare extra-high-voltage transformers. The need for a new policy on spare extra-high-voltage (EHV) transformers emerged in 2011 when Statnett, the Norwegian transmission system operator (TSO), commenced a huge investment and reinvestment program. New renewables in the form of wind farms and a large number of small-scale hydro power plants were being connected to the TSO's 300-kV transmission system in areas with surplus energy. The energy had to be either transmitted to areas in Norway with an energy deficit or, alternatively, exported to other countries.