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UT Power Engineering Laboratory - "Powering the Future "

Nonactive Power Compensation in Distributed Energy Systems

Sponsored by National Science Foundation and Oak Ridge National Laboratory


Yan Xu
Dr. Leon M. Tolbert
Dr. John N. Chiasson


There are several nonactive components in single and/or polyphase systems:
  • fundamental reactive current/power.
  • harmonics which frequencies are the integer multiples of the fundamental frequency.
  • subharmonics and nonperiodic components which frequencies are not the integer multiples of the fundmental frequency.
  • unblanced currents and/or voltages which may exist in polyphase systems.

    At present, different definitions of nonactive current/power, different compensation strategies are being used in nonactive power compensation. In this project, a new definition of nonactive current/power is used to study the nonactive power compensation in different cases. This generalized definition applies to single/polyphase, periodic/nonperiodic systems.

    nonactive 01

    Fig 1. System Configuration of a shunt compensator.

    nonactive 02
    nonactive 03
    Fig 2 and 3. 3-phase periodic compensation

    Related publications and presentations

    Y. Xu, J. N. Chiasson, L. M. Tolbert, “Nonactive Current Definition and Compensation Using a Shunt Active Filter,” IEEE International Conference on Harmonics and Quality of Power, September 12-15, 2004, Lake Placid, New York.

    Y. Xu, L. M. Tolbert, F. Z. Peng, J. N. Chiasson, J. Chen, “Compensation-based Non-active Power Definition,” IEEE Power Electronics Letters, vol. 1, no. 2, June 2003, pp. 45-50.

    L. M. Tolbert, Y. Xu, J. Chen, F. Z. Peng, J. N. Chiasson, "Definitions for Non-Periodic Current Compensation," 10th European Conference on Power Electronics and Applications - EPE 2003, September 2-4, 2003, Toulouse, France.

    L. M. Tolbert, Y. Xu, J. Chen, F. Z. Peng, J. N. Chiasson, "Compensation of Irregular Currents with Active Filters," IEEE Power Engineering Society General Meeting, July 13-18, Toronto, Canada.

    L. M. Tolbert, Y. Xu, J. Chen, F. Z. Peng, J. N. Chiasson, "Application of Compensators for Non-Periodic Currents," IEEE Power Electronics Specialist Conference, June 15-19, 2003, Acapulco, Mexico, pp. 1525-1530.

    L. M. Tolbert, Y. Xu, J. Chen, F. Z. Peng, J. N. Chiasson, "Active Filter Energy Storage Requirement for Non-Periodic Current Compensation," IASTED International Conference on Power and Energy Systems (PES 2003), February 24-26, 2003, Palm Springs, California, pp. 388-393.

    "Nonactive Power Compensation in Distributed Energy Systems"

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