A Dynamic Voltage Restorere with a selective Harmonic Mitigation and Robust Peak Detection.pdf

A Dynamic Voltage Restorere with a selective Harmonic Mitigation and Robust Peak Detection 1 1 2 1 Hyunsik Jo , Ilyong Lee , Byung-Moon Han Hanju Cha 1Chungnam National University, 2Myongji University, Korea Abstract—In this paper, a three-phase dynamic voltage restorer but it takes a longer delay time to calculate the RMS value [7], and control algorithms are proposed. The compensator detects a [8]. This paper proposes a fast and robust sag detection voltage sag or interruption within 2-msec delay and provides algorithm for the line-interactive DVR, which calculates the rated voltage from supercapacitor bank to the critical load. The fundamental and harmonic components by using the discrete proposed peak detection method calculates the fundamental and Fourier transform and has a constant detection response time harmonic components by using the discrete Fourier transform, regardless of phase angle at which sag occurs. During the sag and has a constant detection response regardless of phase angle compensation, a new selective harmonic mitigating method at which sag occurs. The proposed detection method shows a for voltage controller is proposed. Control of fundamental fast and robust response even under the distorted grid voltage output voltage uses the synchronous reference frame PI condition, which is polluted by harmonics. During the sag control which makes difference between reference value and compensation, a new selective harmonic mitigating method for