Computationally efficient long-Horizon direct model predictive control for transient operation
- Publication Type:
- Conference Proceeding
- 2017 IEEE Energy Conversion Congress and Exposition, ECCE 2017, 2017, 2017-January pp. 4642 - 4649
- Issue Date:
© 2017 IEEE. In this paper we present modifications in the sphere decoder initially introduced in  and modified in  that allow for its implementation in transient operation. By investigating the geometry of the integer problem underlying direct model predictive control (MPC), a new sphere that guarantees feasibility and includes a significant smaller number of candidate solutions is computed. In a first analysis, the computational complexity can be reduced by up to 99.7% when a variable speed drive system consisting of a three-level neutral point clamped (NPC) voltage source inverter and a medium-voltage induction machine is examined. As also shown, optimality is sacrificed only to a limited extent, thus maintaining the very fast transient response inherent to direct MPC.
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