Electrical energy is one of the simplest used forms of energy and with the betterment of technology, the dependency on the electrical energy has been increased rapidly. But, the quality of power is affected by different internal and external factors. Power quality problem is any power problems manifested in voltage, current, or frequency deviations that result in failure or missed operation of utility or end user equipment, due to increasing quantities of non-linear loads in the industries. Nowadays power quality problem is an issue to the industrial customers. As a result, many of the industries in our country faced with the problem of power quality, having various causes. In This research work, power quality problem identifications and mitigation techniques have been studied in Amhara pipe factory. The study focuses on investigating and identifying the power quality problems of the industry. The data required for the study is collected from the industry using power quality analyzer and from recorded data. Based on the measurement the following data have been recorded, voltage sags which is less than 90% of the rms voltage, voltage unbalance of 3.214% and current distortions of THD value that reach 44.63%. The collected data have been analyzed and computer simulations are done using Mat lab/Simulink model to show the effectiveness of mitigation techniques. In this thesis dynamic voltage restorer is used to mitigate the problem of voltage unbalance and the results shows that the device restores the decreased phase voltages to balanced value. For voltage sag also dynamic voltage restorer is identified as a solution and the results shows that the device restores the three phases from 190.5V, 195.2V, and 201.2 V, respectively to 230 V. Single-tuned multi-branch filters that are 5th and 7th harmonic filters are designed and simulated for the mitigation of harmonic distortion and the filters are filtered out the harmonics and reduces the THD value from 44.63% to 0.14%.