Digital Control Strategy for Harmonic Compensation of Dynamic Voltage Restorer - Intelligent Computing for Sustainable Energy and Environment - page 16

t (20ms/div ˅

(a) System voltage and compensation voltage waveform

1.5
1

0.5
0

0 200 400 600 800

f /Hz

(b) System voltage frequency spectrum

Fig. 2. Compensation effect for voltage harmonics

t (20ms/div ˅

(a) System voltage and compensation voltage waveform

1.5

1

0.5
0

0 200 400 600 800

f /Hz

(b) System voltage frequency spectrum

Fig. 3. Compensation effect for voltage sag and harmonics