Analysis of Interline Dynamic Voltage Restoration in Transmission Line

Analysis of the design and performance of interline dynamic voltage restorer (IDVR) is proposed in this paper. It provides economical solution to face the difficulty of voltage swell. IDVR consists of series-connected voltage compensator with DC link. This paper proposes the IDVR where the two or more DVRs are connected in multiline (different feeder) for compensating the voltage swell in the transmission line. The ability of dynamic voltage restorer (DVR) is involved to inject real power to the transmission line for long period voltage swell. One of the DVR in IDVR system compensates the voltage swell, and others are connected to the DC link which replenish the energy and maintain the DC link voltage at the desired value. Series-connected compensator compensates the source-side voltage disturbance either through voltage sag or swell, correspondingly. In this paper initially open-loop control IDVR system using PWM technique has been analyzed. The simulation result has been verified using MATLAB/Simulink.