Abstract

The quality of electrical power plays vital role in the utility systems and industry. The quality of the power tends to have a direct economic impact on consumers and suppliers. Nowadays, standards and regulations are imposed to maintain the power quality parameters at the Point of Common Coupling (PCC). Growing consumer demands lead to power quality issues. Many consumers may experience severe technical and economic impacts due to power quality problems such as voltage sag, swell, harmonics and voltage interruptions. Therefore, the implementations of innovative and cost-effective compensation techniques are needed. Compensation methodology implemented by using high speed power electronic devices is an effective solution for the power quality issues. A custom power device such as Unified Power0 Quality Conditioner (UPQC) is one of the most versatile active power filter device with the promising ability of improving the quality of voltage and current at the point of installation in distribution and industrial power systems.The research work is primarily concentrated on compensation of voltage sag, voltage swell, and harmonics. The proposed UPQC system improves the power quality in power distribution systems using advance control strategy. The proposed system is based on the instantaneous active power (p) and reactive power (q) control theory. The control strategy of the UPQC system used in the proposed work includes two parts, namely series control and parallel control.