Smart Transmission Network Emergency Control
For power system operators, this work offers a potential method to avoid economic damages from load shedding during emergencies, though it remains at an early conceptual stage.
The paper proposes using transmission line susceptance adjustment as an alternative to load shedding for emergency control in power systems, aiming to maintain seamless electricity service. Simple numerical simulations illustrate the concept, but no concrete performance numbers are provided.
Power systems normally operate at their stable operating conditions where the power supply and demand are balanced. In emergency situations, the operators proceed to cut a suitable amount of loads to rebalance the supply-demand and hopefully stabilize the system. This traditional emergency control scheme results in interrupted service with severely economic damages to customers. In order to provide seamless electricity service to customers, this paper proposes a viable alternative for traditional remedial controls of power grids by exploiting the plentiful transmission facilities. In particular, we consider two emergency control schemes involving adjustment of the susceptance of a number of selected transmission lines to drive either fault-on dynamics or post-fault dynamics, and thereby stabilize the system under emergency situations. The corresponding emergency control problems will be formulated and partly solved in some specific cases. Simple numerical simulation will be used to illustrate the concept of this paper.