Paper Details

Most of the devices at present using in the automation industry are non-linear type and they are sensitive tovoltage disturbances. Super computers, patient monitoring systems in hospitals and manufacturing industry desires balancedvoltage continuously. But due to fault occurrence in the distribution network supply voltage will become unbalanced andhence connected load starts malfunctioning. To ensure the healthy working of the sensitive load devices during faultcondition Flexible AC Transmission System (FACTS) equipment’s are used in the transmission and distribution networks. Inthe FACTS family dynamic voltage restorer (DVR) is an important device used to control the power flow and provideprotection of sensitive loads against voltage issues in the modern power system. In this paper, Instantaneous SymmetricalComponent Theory (ISCT) based control process implemented to die out the electrical power quality difficulties like voltagesag/swell, transients, harmonics, interruption and distortion, from the supply voltage at the load bus. Extended SynchronousReference Frame Theory (ESRFT) with ISCT based Controller uses the concept of positive sequence extraction to balancethe phasors with the restoration of voltage and limit the third harmonic distortion (THD). In this case, extract positivesequence from voltage at PCC which then transformed to d-q components. Subsequently Controller performance the outputis transformed back to a-b-c component known as reference signals and matched with real voltage signals at the loadterminal or bus. PWM generator start working with difference of the signals as input excitation generate a sequence of sixpulses through which functioning of IGBT based convertor can be controlled.

Shakir, Amit Jain, Manish Sharma, Muzaffar Hussain, Pradeep Kumar Bhardwaj, “ESRFT WITH ISCT FUNDAMENTAL EXTRACTOR THEORY BASED DVR CONTROLLER USED FOR POWER QUALITY IMPROVEMENT”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 5, Issue 9, pp. 161-169, September 2018.