Power and quality of power have its significance in all electrical works. It is very important to maintain a balanced power in all system. In this paper, the distributed side of power system is analyzed for voltage sag and swell. Whenever these faults occur it is important to protect the load, so the authors use some device to isolate the fault from source to load. Here a custom power device namely Interline Unified Power Quality Conditioner (IUPQC) is used to balance the power. IUPQC is used with a new control technique such as the series filter is designed as current controlled and the shunt filter is designed as voltage controlled. The existing technique is compared with another algorithm namely, fuzzy control technique.