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Improving Power Quality Parameters in AC Transmission Systems Using Unified Power Flow Controller

Author Affiliations

  • 1Islamic Azad University, Najaf Abad Branch, Najafabad, Isfahan, IRAN
  • 2 Young Researchers Club, Najafabad Branch, Islamic Azad University, Najafabad, Isfahan, IRAN

Res. J. Recent Sci., Volume 2, Issue (4), Pages 84-90, April,2 (2013)


According to development of electric power consumption, and increasing nonlinear loads in power systems, production of electric power with a high quality is the main problem of power engineering. Therefore, it is necessary to evaluate the problems of power quality in the power systems in order to improve it. For improving these parameters a Unified Power Flow Controller is designed and simulated in multi-machine power system. The on-line designed process is based on PWM method which all the power quality parameters can be improved. In the proposed control method, the harmonic distortion of the system is decreased and the voltage oscillations of the DC capacitor will be improved. Simulations that are done by the PSCAD/EMTDC software show the effectiveness and precision of this designing.Also the experimental results are compared with the simulation results. From the results, it observed that the experimental results closely agree with the simulation results.


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