Augmentation of Transient Stability Limit of a Power System by Automatic Multiple Application of Dynamic Braking

Dynamic braking is known to be a powerful method of augmenting transient stability margins. Investigations of analytical studies supported by experimental verification using micro-machine model of a power system, are presented. A simple strategy based on speed deviation signal has been developed and successfully utilized for automatic single or multiple insertion of braking resistor, whenever required. The stability limit for a transient three phase fault is found to be appreciably raised. A fair degree of agreement between the analytical and experimental results enhances confidence in their reliability.