Fuzzy Logic Technique For Pq Improvement

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Fuzzy Logic Technique for PQ Improvement by UPQC for Renewable Energy Recourse’s

1BJ SHIVA RAMA KRISHNA RAO, PG STUDENT, BRILLIANT GROUP OF INSTITUTIONS, HYD
2O SWATHI, PG STUDENT, BRILLIANT GROUP OF INSTITUTIONS, HYD
3B. NAGI REDDY, ASST.PROF, BRILLIANT GROUP OF INSTITUTIONS, HYD

ABSTRACT: -- In this a fuzzy logic control technique has been proposed for power quality improvement by using UPQC The UPQC is controlled to regulate the WF terminal voltage, and to mitigate voltage fluctuations at the point of common coupling (PCC), caused by system load changes and pulsating WF generated power, respectively. In order to reduce the voltage fluctuations that may cause “flicker”, and improve WF terminal voltage regulation, several solutions have been posed. The voltage regulation at WF terminal is conducted using the UPQC series converter, by voltage injection “in phase” with PCC voltage. On the other hand, the shunt converter is used to filter the WF generated power to prevent voltage fluctuations, requiring active and reactive power handling capability. The sharing of active power between converters is managed through the common DC link. A customized internal fuzzy logic control scheme of the UPQC device was developed to regulate the voltage in the WF terminals, and to mitigate voltage fluctuations at grid side. Simulation results show the effectiveness of the proposed compensation strategy for the enhancement of Power Quality.

Keywords — Wind Energy, UPQC, voltage

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