Improving Power System Stability in A National Grid Using the Dynamic Voltage Restorer (DVR)

Generation, transmission and distribution are the three subunits into which electric power grid is divided for efficient power supply. This paper proposes the method of power system stability in a national grid using Dynamic Voltage Restorer (DVR). DVR is a series custom connected power device meant to detect and compensate for sags in order to insulate loads from power reliability issues. They can be implemented at both low voltage (LV) and high voltage (HV) levels. Power system instability was established and its stabilization was demonstrated. The Nigerian 330KV, 30 bus system was used to demonstrate the DVR application. The characterized 330KV was made up of 6 generators, 24 loads, 30 buses and 31 transmission lines and used for the demonstration of the work. Using its Simulink model, the DVR was integrated into the Nigerian 330KV, 30 bus power system. This was simulated and results generated for analysis which showed stable power after the use of DVR. It was further discovered that there is need to optimize DVR operation using heuristic algorithms like particle swamp optimization (PSO), ant colony optimization (ACO) and simulated annealing (SA) for improved result