A Mitigation Technique for Inrush Currents in Load Transformers for the Series Voltage Sag Compensator
Keywords:
voltage sag, Flux linkage, inrush current, Transformer, power quality, voltage sag compensator.Abstract
In many countries, high-tech manufacturers concentrate in industry parks. Survey results suggest that 92% of interruption at industrial facilities is voltage sag related. An inrush mitigation technique is proposed and implemented in a synchronous reference frame sag compensator controller. The voltage sag compensator consists of a three phase voltage source inverter and a coupling transformer for serial connection. It is the most cost effective solution against voltage sags. When voltage sag happen, the transformers, which are often installed in front of critical loads for electrical isolation, are exposed to the disfigured voltages and a DC offset will occur in its flux linkage. When the compensator restores the load voltage, the flux linkage will be driven to the level of magnetic saturation and severe inrush current occurs. The compensator is likely to be interrupted because of its own over current protection. This paper proposes an inrush current mitigation technique together with a state-feedback controller for the Voltage sag compensator.
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D. L. Brooks and D. D. Sabin, “An assessment of distribution system power quality,” Elect. Power Res. Inst., Palo Alto, CA, EPRI Final Rep. TR-106249-V2, May 1996, vol. 2.
W. E. Brumsickle, R. S. Schneider, G. A. Luckjiff, D. M. Divan, and M. F. McGranaghan, “Dynamic sag correctors: Cost-effective industrial power line conditioning,” IEEE Trans. Ind. Appl., vol. 37, no. 1, pp. 212–217, Jan./Feb. 2001.
N. H. Woodley, “Field experience with dynamic voltage restorer (DVRTMMV) systems,” in Proc.
IEEE Power Eng. Soc. Winter Meeting, Jan. 23–27, 2000, vol. 4, pp. 2864–2871.
R. Affolter and B. Connell, “Experience with a dynamic voltage restorer for a critical manufacturing facility,” in Proc. IEEE Transmiss. Distrib. Conf. Expo., 2003, vol. 3, pp. 937–939.
C. N.-M. Ho, H. S. H. Chung, and K. T. K. Au, “Design and implementation 20of a fast dynamic control scheme for capacitor-supported dynamic voltage restorers,” IEEE Trans. Power Electron., vol.
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