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A Distributed Secondary Control Algorithm for Automatic Generation Control Considering EDP and Automatic Voltage Control in an AC Microgrid

Author

Listed:
  • Mi Dong

    (School of Information Science and Engineering, Yuelu Road, Central South University, Changsha 410083, China)

  • Li Li

    (School of Information Science and Engineering, Yuelu Road, Central South University, Changsha 410083, China)

  • Lina Wang

    (School of Automation Science and Electrical Engineering, Xueyuan Road, Beihang University, Beijing 100191, China)

  • Dongran Song

    (School of Information Science and Engineering, Yuelu Road, Central South University, Changsha 410083, China)

  • Zhangjie Liu

    (School of Information Science and Engineering, Yuelu Road, Central South University, Changsha 410083, China)

  • Xiaoyu Tian

    (School of Information Science and Engineering, Yuelu Road, Central South University, Changsha 410083, China)

  • Zhengguo Li

    (ShenZhen Polytechnic, Shenzhen 518055, China)

  • Yinghua Wang

    (Huangshi Electric Power Supply Company in State Grid, Huangshi 435000, Hubei, China)

Abstract

This paper introduces a distributed secondary control algorithm for automatic generation control (AGC) and automatic voltage control (AVC), which aims at matching area generation to area load and minimizing the total generation cost in an alternating current (AC) microgrids. Firstly, the control algorithm utilizes a continuous-time distributed algorithm to generate additional control variables to achieve frequency-voltage recovery for all distributed generators (DGs). Secondary, it solves the economic dispatch problem (EDP) by a distributed economic incremental algorithm in the secondary control level, which avoids the problem caused by communication speed inconsistency between secondary and tertiary control levels. This study also utilizes a fully distributed strategy based on secondary communication network to estimate the total load demand. In addition, the proposed algorithm can be used to realize a seamless handover from the islanded mode to the grid-connected mode, run under the condition of short time communication system out of action, and help to realize the plug and play function. Lastly, the stability of the proposed control algorithm is analyzed and proved, and the effectiveness of the method is verified in some case studies.

Suggested Citation

  • Mi Dong & Li Li & Lina Wang & Dongran Song & Zhangjie Liu & Xiaoyu Tian & Zhengguo Li & Yinghua Wang, 2018. "A Distributed Secondary Control Algorithm for Automatic Generation Control Considering EDP and Automatic Voltage Control in an AC Microgrid," Energies, MDPI, vol. 11(4), pages 1-18, April.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:4:p:932-:d:141021
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    References listed on IDEAS

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