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158 From smart grid to internet of energy

(A)

(B)

(C)
FIG. 4.15 PLC infrastructure of designed remote monitoring system; (A) Block diagram of PLC
modem based on BPSK, (B) BPSK modulator in Matlab/Simulink, (C) BPSK demodulator in
Matlab/Simulink.

the modem in Matlab/Simulink are illustrated for one channel in Fig. 4.15B and
C, respectively.
Fig.4.16Ashowslinevoltagetotalharmonicdistortion(THD)analysisresultfor
unloadedcaseoftheMLI.TheTHDratioforthiscaseiscalculatedas0.04%inwhich
all baseband and carrier harmonics are nearly removed. The THD of line voltage
analysis for fully loaded case is depicted in Fig. 4.16B where the MLI is loaded