Impact of Distributed Power Flow Controller to Improve Power Quality Based on Synchronous Reference Frame Method Best Electrical Engineering Projects

ABSTRACT

Modern power utilities have to respond to a number of challenges such as growth of electricity demand specially in non-linear loads in power grids, consequently, some policies about the power with a higher quality should be considered. In this paper, distributed power flow controller (DPFC) which is similar to unified power flow controller (UPFC) in structure, is used to mitigate the voltage sag and swell as a power quality issue. Unlike UPFC, the common dc-link in DPFC, between the shunt and series converters is eliminated and three-phase series converter is divided to several single-phase series distributed converters through the transmission line. Also to detect the voltage sags and determine the three single-phase reference voltages of DPFC, the synchronous reference frame method is proposed. Application of DPFC in power quality enhancement is simulated in Matlab/Simulink environment which show the effectiveness of the proposed structure.

 

KEYWORDS:

  1. FACTS
  2. Power quality
  3. Sag and swell mitigation
  4. Distributed power flow controller.

 

SOFTWARE: MATLAB/SIMULINK

 

CIRCUIT DIAGRAM:

 DPFC structure.

Fig. 1. The DPFC structure.

Active power exchange between DPFC converters.

Fig. 2. Active power exchange between DPFC converters.

 

EXPECTED SIMULATION RESULTS:

 Three-phase load voltage sag waveform.

Fig. 3. Three-phase load voltage sag waveform.

Mitigation of three-phase load voltage sag with DPFC.

Fig. 4. Mitigation of three-phase load voltage sag with DPFC.

Three-phase load current swell waveform.

Fig. 5. Three-phase load current swell waveform.

 Mitigation of load current swell with DPFC.

Fig. 6.Mitigation of load current swell with DPFC.

CONCLUSION

The power quality enhancement of the power transmission systems is an vital issue in power industry. In this study, the application of DPFC as a new FACTS device, in the voltage sag and swell mitigation of a system composed of a three-phase source connected to a non-linear load through the parallel transmission lines is simulated in Matlab/Simulink environment. The voltage dip is analyzed by implementing a three-phase fault close to the system load. To detect the voltage sags and determine the three single phase reference voltages of DPFC, the SRF method is used as a detection and determination method. The obtained simulation results show the effectiveness of DPFC in power quality enhancement, especially in sag and swell mitigation.

REFERENCES

[1] J. Faiz, G. H. Shahgholian, and M. Torabian, “Design and simulation of UPFC for enhancement of power quality in transmission lines,” IEEE International Conference on Power System Technology, vol. 24, no. 4, 2010.

[2] A. E. Emanuel and J. A. McNeill, “Electric power quality,” Annu. Rev. Energy Environ, 1997.

[3] I. N. R. Patne and K. L. Thakre “Factor affecting characteristics of voltage sag due to fault in the power system,” Serbian Journal of Electrical engineering. vol. 5, no.1, 2008.

[4] J. R. Enslin, “Unified approach to power quality mitigation,” in Proc. IEEE Int. Symp. Industrial Electronics (ISIE ’98), vol. 1, 1998.

[5] B. Singh, K. Al-Haddad, and A. Chandra, “A review of active filters for power quality improvement,” IEEE Trans. Ind. Electron. vol. 46, no. 5, pp. 960–971, 1999.

[6] M. A. Hannan and A. Mohamed, member IEEE, “PSCAD/EMTDC simulation of unified series-shunt compensator for power quality improvement,” IEEE Transactions on Power Delivery, vol. 20, no. 2, 2005.

 

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