The three GB transmission owners are tasked under their licence and the System Operator Transmission Owner Code (STC) to develop an efficient, coordinated and economic transmission system. This obligation sits in a background of challenging renewable generation targets that have triggered significant transmission infrastructure reinforcements. The drive on sustainable development has led to the application of new technologies such as HVDC links and Series Compensation to avoid where possible the construction of new circuits.
The safe and secure integration of these technologies requires exhaustive system design studies. However experience tells us that it is not possible, let alone economic to design a power system that is guaranteed free from unforeseen and potentially damaging events.