Page 184 - From Smart Grid to Internet of Energy

Power line communication technologies in smart grids Chapter 4 159

0.22 0.21 0.2 100 80
FFT window: 5 of 19.7 cycles of selected signal 0.19 0.18 0.17 0.16 Time (s) Fundamental (50Hz)=34.74, THD=2.37% 60 40 Harmonic order

0.13 0.15 0.14 20 0
Signal 40 20 0 –20 –40 FFT analysis 1.8 1.6 1.4 1.2 1 0.8 0.6 Mag (% of Fundamental) 0.4 0.2 0 (C)

100
0.21 0.2 90 80 70
FFT window: 5 of 48.96 cycles of selected signal 0.19 0.18 0.17 0.16 Time (s) Fundamental (50Hz)=383.7, THD=2.12% 60 50 40 30 Harmonic order THD analyses of designed solar microgrid, (A) THD of line voltages at unloaded operation, (B) THD of line voltages for fully loaded case, (C) THD of

0.13 0.15 0.14 FFT analysis 20 10 0
Signal 400 200 0 –200 –400 1 0.8 0.6 0.4 Mag (% of Fundamental) 0.2 0 (B)

100
0.17 0.16 0.15 80
FFT window: 5 of 9.346 cycles of selected signal 0.14 0.13 0.12 0.11 Time (s) Fundamental (50Hz)=386.8, THD=0.04% 60 40 Harmonic order kW. 13 with loaded

0.09 0.1 20 when
0.08 FFT analysis 0 0 currents
0
Signal 300 200 100 –100 –200 –300 0.03 0.025 0.02 0.015 0.01 Mag (% of Fundamental) 0.005 (A) FIG. 4.16 line