This paper highlights the case studies of steel plant and Municipal Corporation taking into consideration the power quality improvements. The main reason we are interested in Power Quality is economic value. The increasing application of electronic equipment and Distributed Generation has heightened the interest in Power Quality in recent years and this has been accompanied by special development of special terminology to describe the phenomena. Meeting customer's expectations and maintaining customer confidence are the strong motivators behind maintaining the Power Quality. Distributed Generation has started gaining importance in our country and can become the answer for increasing the power failure. Power failure leads power interruption leading to insecure and unreliable Power System.