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Managing microgrids with intermittent resources: A two-layer multi-step optimal control approach

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3 Author(s)
Dinghuan Zhu ; Dept. of Electr. & Comput. Eng., Carnegie Mellon Univ., Pittsburgh, PA, USA ; Rui Yang ; Hug-Glanzmann, G.

A novel multi-step coordinated control approach for microgrid management is proposed considering economic and environmental aspects. The proposed concept consists of a two-layer control algorithm, the component-layer and the top-layer controls. Both are based on look-ahead multi-step optimization techniques. Assuming the availability of renewable power forecasting methods, future states of the microgrid are taken into account in the multi-step optimization. The component-layer control is utilized to maintain the power output from renewable energy constant for short periods while the top-layer control properly alleviates the severe fluctuations of the power output from conventional generators caused by balancing the output from intermittent resources. Regarding those aforementioned goals, energy storage devices play a critical role in both control layers. A typical campus-wide microgrid is carefully examined as an example. Simulation results of each layer control applied to the test system are presented demonstrating the performance of the proposed two-layer control method.

Published in:

North American Power Symposium (NAPS), 2010

Date of Conference:

26-28 Sept. 2010