Operation and control of a dynamic voltage restorer using transformer coupled H-bridge converters |
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Authors: | Bingsen Wang Venkataramanan G. Illindala M. |
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Affiliation: | Dept. of Electr. & Comput. Eng., Wisconsin Univ., Madison, WI, USA; |
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Abstract: | The dynamic voltage restorer (DVR) as a means of series compensation for mitigating the effect of voltage sags has become established as a preferred approach for improving power quality at sensitive load locations. Meanwhile, the cascaded multilevel type of power converter topology has also become a workhorse topology in high power applications. This paper presents the detailed design of a closed loop regulator to maintain the load voltage within acceptable levels in a DVR using transformer coupled H-bridge converters. The paper presents system operation and controller design approaches, verified using computer simulations, and a laboratory scale experimental prototype. |
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