Power Quality Improvement by Using UPQC: A Review

This paper presents literature review for improving the power quality by using the unified power quality conditioner (UPQC). There is a more complex network in the power system, in which generating station is connected with the load center through long transmission and distribution line. For improving the performance of distribution network the new concept came into existence known as custom devices. One of the custom power device is unified power quality conditioner is one of the custom power devices. The different configurations of UPQC system for single phase and three phases are well discussed in this paper. The various researchers have given different names to the UPQC according to their function, topology and application. The various topologies of UPQC explained are, left shunt (UPQC-L), right shunt (UPQC-R), open UPQC, Interlined UPQC (UPQC-I), Modular UPQC (UPQC-ML).