Abstract: The problem of stability has been a great concern. There are voltage stability problems and power stability problem which are of concern in the power system. The transient stability is a severe stability problem and is the major disturbance in synchronous alternator which can be reduced in many ways. This disturbance may cause severe problems. By using proper control strategies it is made sure that the synchronous alternatorís rotor angle returns to a stable value after a sudden disturbance. In this project, HVDC links have been used in the IEEE 14 bus system and the difference of the voltage stability is seen in the system with and without HVDC links. Different control strategies have been implemented to solve the problem of transient stability. The project is designed with the help of ETAP software where IEEE 14 bus system is built, load flow and transient analysis is done by applying the fault on bus 5 and bus 10. Then HVDC links are connected between bus 1 and bus 5, bus 9 and bus10. A fault is done on bus 5 and bus 10 and transient analysis have been done for both the faults. The results are obtained, compared and discussed in detail, which makes it clear whether transients are improved or not.

Keywords: Transient Analysis, HVDC link, Design, ETAP, Improvement, AC system