Power quality improvement is an important issue in power system. Flexible AC Transmission (FACTS) devices are commonly used for solving problems related to power quality and improving it. In this paper a synchronous static series compensator (SSSC) is used for control and modulation of power flow in a transmission line. The Pulse Width Modulation (PWM) and SVPWM control techniques are employed in SSSC. The active performance of SSSC is evaluated using Matlab/Simulink environment. The simulation results validate that the power quality is enhanced properly using SSSC.
1. Power Quality
Figure 1. Functional model of SSSC.
EXPECTED SIMULATION RESULTS:
Figure 2. (a) Source voltage (b) Source current without SSSC.
Figure 3. (a) Load voltage (b) Load current without SSSC.
Figure 4. (a) Source voltage (b) Source current with SSSC.
Figure 5. (a) Load voltage (b) Load current with SSSC.
Figure 6. (a) Source voltage (b) Source current with SVPWM SSSC.
Figure 7. (a) Load voltage (b) Load current with SVPWM SSSC.
Figure 8. FFT analysis of (a) Source voltage (b) Source current-without SSSC.
Figure 9. FFT analysis of (a) Load voltage (b) Load current –without SSSC.
Figure 10. FFT analysis of (a) Source voltage (b) Source current with SSSC.
Figure 11. FFT analysis of (a) Load voltage (b) Load current with SSSC.
Figure 12. FFT analysis of (a) source voltage and (b) source current using SVPWM SSSC.
Figure 13. FFT analysis of (a) Load voltage and (b) Load current using SVPWM SSSC.
In this paper the problem of modulation and control of power flow in transmission line is carried out by using SSSC with PWM and SVPWM techniques. The performance of SSSC is validated using Matlab/Simulink software. Thus, simulation results and THD analysis shows that by using SVPWM based SSSC power quality gets improved more as compared to the SPWM based SSSC. Hence SVPWM technique proves better as compared to that of the SPWM technique for power quality improvement.
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