A Novel Seamless Reconnection and Islanding Technique for Upqc Connected Microgrid Using Fuzzy

This paper explains a new proposal for the placement, integration, and control of unified power quality conditioner (UPQC) in distributed generation (DG)-based grid connected/autonomous micro grid/micro generation (μG) system has been presented here along with fuzzy logic controller. Here we using fuzzy logic controller instead of using other controllers. The DG converters (with storage) and the shunt part of the UPQC Active Power Filter (APFsh) is placed at the Point of Common Coupling (PCC). The advantages of the proposed UPQCμG−IR over the normal UPQC are to compensate voltage interruption in addition to voltage sag/swell, harmonic and reactive power compensation in the interconnected mode. The series part of the UPQC (APFse) is connected before the PCC and in series with the grid. The dc link can also be integrated with the storage system. An intelligent islanding detection and reconnection technique (IR) are introduced in the UPQC along with fuzzy logic as a secondary control. Hence, it is termed as UPQCμG−IR. During the interconnected and islanded mode, DG converter with storage will supply the active power only and the shunt part of the UPQC will compensate the reactive and harmonic power of the load. It also offers the DG converter to remain connected during the voltage disturbance including phase jump. The simulation was done by using MATLAB/Simulink software.