Authors: S.Manmadha Rao, S.V.R.Lakshmi Kumari, B.Srinivasa Rao
Power quality is the most important aspect in the present power system environment. Among all the power quality problems most frequently occurring disturbances, affecting the quality of power are voltage sags and swells. Custom power device, Dynamic Voltage Restorer (DVR) connected in series with a goal to protect the loads from source side voltage disturbances. In this paper single phase DVR is adopted for each phase instead of using three phase DVR to compensate unbalanced sags/swells. Programmable voltage source is used to create sags/swells with required magnitude and time period. In this paper voltage type Impedance Source Inverter (ISI) is employed to compensate deep voltage sags/swells. DVR’s employed as series compensators in IPFC scheme to compensate voltage disturbances in individual feeders. Comparative study between PI and Fuzzy controllers is done. The project is carried out in Matlab/Simulink software.
Dynamic voltage restorer (DVR), Impedance source inverter (ISI), Interline power flow controller (IPFC)
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