A device for load flow control of a direct current in a branch of a direct current voltage network node having a longitudinal voltage source which has a coupling device for connection or disconnection of electrical power. The coupling device for connection and disconnection of electrical power are connected to a coupling device for connection and disconnection of electric power of a further load flow control device which is disposed in another branch of the same direct current voltage network node. Thus the device can be used economically and flexibly for control of a load flow on or in a network node.