Transient Stability by means of Generator Tripping, Under Frequency Load Shedding and a Hybrid Control Scheme

Abstract

Abstract An electrical network constantly faces unforeseen events such as faults on lines, loss of generation, etc. Under Frequency Load Shedding (UFLS) and Generator Tripping are traditional methods used to stabilise a network when a transient fault occurs. These methods will prevent any network instability by shedding load or tripping the most critical generator at a calcultated time when required. By executing these methods, the network can be stabilised in terms of balancing the generation and the load of a power system. A hybrid control scheme is proposed where the traditional methods are combined to reduce the stress levels exerted on the network and to minimize the load to be shed.