Abstract: A method controls power flow in an electrical supply network. The method includes: providing at least one power flow control device, providing a model of the electrical supply network for estimating the distribution of the power flow in the electrical supply network in accordance with predefined network parameters, and simulating the power flow in the network using the model such that a potential congestion path in the electrical supply network is identified. As a result of the simulation, a positioning scheme for the at least one power flow control device is provided, such that congestion in the identified potential congestion path can be avoided. The at least one power flow device is configured in accordance with the positioning scheme. The power flow in the supply network is controlled by means of the at least one power flow control device.