The dynamic braking resistor is one of the effective methods to enhance the transient stability of power grid system. In this work, two new braking resistor models, namely, rectifier controlled braking resistor and chopper rectifier controlled braking resistor mod-els, using a single unit of braking resistor are proposed, and their performance is compared with the existing thyristor controlled braking resistor model. Comparison is made in terms of the speed indices, number of components used, heat loss, harmonics, and cost. The effectiveness of the proposed methodology is tested through Matlab/ Simulink simu-lations considering both temporary and permanent faults in power system. Simulation results for all braking resistor models are compared and analyzed. The performance of the proposed models is comparable to the existing braking resistor model. Therefore, the proposed braking resistor models can be considered as an alternative to the existing BR model for improving the transient stability of power systems
