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Analysis of Buck-Boost DC-DC converter Controlled SPRS using PWMVSI with Voltage and Current Control Techniques

Sita Ram Bhardwaj, Y. R. Sood, O. P. Rah, Veena Sharma

Abstract


Slip power recovery scheme (SPRS) employing semiconductor technology has a considerable role in the progress of variable speed slip ring induction motor drive (SRIMD). SPRS utilizing the various configurations of pulse width modulated (PWM) inverters are current source inverters, voltage source inverters (VSI) with voltage and current control techniques, while the choppers are buck, boost, and buck-boost configurations. The PWMVSI with chopper controller allows the reactive power and speed control simultaneously, therefore achieves the decoupled control of SRIM. This study presents the analysis of SPRS based SRIMD employing PWMVSI with voltage and current control techniques in combination with buck-boost DC-DC converter using MOSFET semiconductor devices. In the voltage control technique, the power is returned back to supply through reactor while in the PWMVSI using current control technique, the power is feedback to the supply through reactor and step-up transformer. The goal of voltage and current control techniques is to decrease the reactive power requirement of inverter from the supply, as a result of THD[WU1]  of supply current, and improve the power factor as well as efficiency of SRIMD. The simulation model of 2 hp motor has been developed in the Simulink to analyze the performance characteristics of SRIMD. From the simulation results it has been established the SPRS using buck-boost DC-DC and PWMVSI employing voltage and current control techniques have improved the power factor and efficiency as well as reduced the reactive power consumption of inverter, therefore THD of supply compared to SPRS without DC-Dc converter.

 


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References


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