Definition
A price area (or bidding zone) is a geographical region in which all electricity is traded at the same spot priceHourly electricity price set in the Nordic power market the day before delivery - basis for variable electricity prices to end users. in the day-ahead market. Price differences between areas arise when the transmission capacity of the main grid is fully utilised (network bottlenecks), causing the electricity price to fall in a surplus area and rise in a deficit area. Norway is divided into five price areas: NO1 (Eastern Norway), NO2 (Southern Norway), NO3 (Central Norway), NO4 (Northern Norway) and NO5 (Western Norway). Nord PoolNordic electricity exchange where power is traded in the wholesale market - the basis for electricity prices in Norway and the Nordic region. administers the price calculation, and StatnettNorway's system operator for the transmission grid - owns and operates the high-voltage network and operates Elhub. reports the capacity constraints. The price areas are defined in collaboration with European system operators (ENTSO-EEuropean Network of Transmission System Operators for Electricity - collaborative body for European TSOs coordinating joint grid operations and regulations.) and can in principle be changed if the network topology changes significantly.