Page 183 - From Smart Grid to Internet of Energy

100
0.22
0.21
FFT window: 5 of 19.7 cycles of selected signal
Fundamental (50Hz)=34.74, THD=2.37%
80
0.2
0.19
60
Harmonic order
0.18
Time (s)
0.17
40
0.16
0.15
20
0.14
0.13
FFT analysis
0
1.4
1.2
1.6
Signal
1.8
1
0.2
0
0.4
0.8
0.6
0
–40
–20
40
20
(C)
Mag (% of Fundamental)
100
0.21
90
FFT window: 5 of 48.96 cycles of selected signal Power line communication technologies in smart grids Chapter 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 4 159
Fundamental (50Hz)=383.7, THD=2.12%
80
0.2
70
0.19
Harmonic order
60
0.18
Time (s)
50
0.17
40
0.16
30
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