Risk assessment of power wheeling in extra high voltage transmission systems

Power wheeling can have an intensive impact on the reliability and availability of the transmission network that is utilized with it. The extended risk for the transmission system network should be considered by fixing the operation charge for the customer. With the method presented in this paper, the increased risk of disturbances, which are caused by asset outages in the 380 kV level, on feeds of the power plants and the supply of customers in the network area can be clearly identified with a self-developed method which uses a Value at Risk (VaR) analysis. For the presentation a transmission network model is used, which represents the main network of a German transmission system operator (TSO). The illustrated scenario for the application of the developed method consists of a power wheeling operation (PWO) with a transmission capacity of 1 GW, which is carried out from the northernmost to the southernmost coupling points of the transmission network.