Enhancement Performance and Stability of Variable Speed Drive Systems with 12-Pulse Rectifier in Modern Industrial Facilities

This paper suggests improving the quality and performance of electrical grid by using Four Chopper circuit in the DC –Link of the variable speed drive system with 12 pulse rectifier. In addition, it analyses the effects on the ripple factor for both current and voltage in DClink and improving the system's stability. For this study a variable speed drive system has been simulated and designed with the proposed chopper and 12 pulse rectifiers. In order to confirm the ability of Using four - quadrant chopper with rectifier circuits and its ability to improve the stability of the power systems, a variable speed system has been simulated Finally, A discussion of the results was introduced. The giving results show the advantages of using the proposed chopper with variable speed drive systems.