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                                                            Power electronic control in electrical systems 205
























                      Fig. 6.29 Key waveforms of the single-phase full-bridge phase-shifted controlled VSC circuit operation.
                      (a) output voltage v o ˆ v AB ; (b) control signal for switch S 1 ; (c) control signal for switch S 2 ; (d) control
                      signal for switch S 3 ; and (e) control signal for switch S 4 .






































                      Fig. 6.30 Key waveforms of the single-phase full-bridge phase-shifted controlled VSC circuit operation. (a) output
                      voltage v o ˆ v AB ; (b) output current i o ; (c) DC bus current i d ; (d) harmonic spectrum of the output voltage
                      v o ˆ v AB ; (e) harmonic spectrum of the output current i o ; and (f) harmonic spectrum of the input DC bus current i d .
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