Reduction of Power Quality Issues in Micro-Grid Using Fuzzy Logic Based DVR

摘要

Power quality is one of major issues in the present world. It has become relevant, especially, with the addition of sophisticated devices, whose performance is very sensitive to the quality of power supply. Power quality issue is an occurrence noted as a nonstandard voltage, current or frequency that may results in a failure of end use devices. One of the major issue dealt here is the power sag & swell. In this paper, we present a novel methodology for the prevention of voltage sag & swell. To solve this issue, custom power devices are adopted. One of those devices is the Dynamic Voltage Restorer (DVR), which is the most efficient and effective modern custom power device used in power distribution networks. Its advantages include lower cost, smaller size, and its fast dynamic response to the disturbance. This paper presents modeling, analysis and simulation of a Dynamic Voltage Restorer (DVR) using MATLAB. In this model, a PI controller and Fuzzy logic controller is used for comparison. In the proposed method, Fuzzy logic controller implemented is replaced by the conventional PID controller to develop the performance of the system. The function of the controller is made faster than conventional technique based controller. By MATLAB simulation tool, the performance can be studied.