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Control Strategies for Microgrids

Control Strategies for Microgrids. Ali Mehrizi-Sani Assistant Professor School of Electrical Engineering and Computer Science Washington State University Wuhan University Thursday, November 28, 2013 (Beautiful) Wuhan, China. Outline. Current and Envisioned Status of the Power System

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Control Strategies for Microgrids

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  1. Control Strategies for Microgrids Ali Mehrizi-Sani Assistant Professor School of Electrical Engineering and Computer Science Washington State University Wuhan University Thursday, November 28, 2013 (Beautiful) Wuhan, China

  2. Outline • Current and Envisioned Status of the Power System • Overview of control requirements • Proposed Control Strategy • Online set point modulation • Results of Evaluation of the Strategy • Offline simulation • Real-time implementation • Fine tuning the parameters of the strategy • Applications

  3. Proposed Solution • Improving the response by temporarily manipulating the set point

  4. Set Point Modulation • Best Strategy • Choose T1 so that the peak of the response equals the reference • Choose T2 to be the time of this peak • Not Implementable • Faster-than-real-time simulator • Closed-form solution • System parameters x(t) t

  5. Case Study I: Set Point Change • IEEE 34-Bus System • Added 3 DG units and a load • Operates in grid-connected mode • System Response • DG2 step change from 0.91 pu to 1.09 puDG1 and DG3 unchanged • (40% overshoot)

  6. Case Study III: Load Disconnection • IEEE 34-Bus System • Added 3 DG units and a load • Operates in grid-connected mode • System Response • Resistive 0.5 pu load change (15% overshoot)

  7. Thank You Control Strategies for Microgrids Ali Mehrizi-Sani mehrizi@eecs.wsu.edu http://eecs.wsu.edu/~mehrizi

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