Deere & Company

Purdue Research Foundation

Schweitzer Engineering Laboratories, Inc.

Dionysios Aliprantis

Guozhen Zhou

Ayesha Sayed

Dakota Hamilton

Techniques and apparatus presented herein are directed to improvements in maintaining voltage and frequency stability of an electric power delivery system. To do so, model predictive control (MPC) may be used. Input data may be obtained for a sampling period and may include a current system state. The MPC may predict an initial trajectory of the input data, output data, and a state of the system for a prediction period. The MPC may linearize the output and state trajectories and determine an updated input trajectory based at least in part on the linearized output trajectory. The MPC may determine control inputs to the system which achieve the updated input trajectory for a control period. The MPC may transmit control signals based at least in part on the control inputs to equipment associated with the input data.

Linearized-trajectory predictive control for microgrid stability

In an example embodiment, a method of controlling an electric machine includes obtaining an estimated position waveform, the estimated position waveform being based on a position of a rotor of the electric machine, the estimated position waveform having an error signal and an actual position waveform and determining a corrected position waveform based on the estimated position waveform. The determining the corrected position waveform of the rotor includes determining an estimated first coefficient and an estimated second coefficient and reducing at least one frequency component of the error signal using the estimated first coefficient and the estimated second coefficient to determine the corrected position waveform. The method further includes controlling the electric machine based on the corrected position waveform and reducing a ripple in a direct current (DC) link voltage based on the controlling.

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West Lafayette, IN, United States of America

Dionysios Aliprantis