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Energies 2018, 11(1), 243; https://doi.org/10.3390/en11010243

Adaptively Constrained Stochastic Model Predictive Control for the Optimal Dispatch of Microgrid

1
College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
2
Shandong Longkou Electricity Supply Company, State Grid Corporation of China, Longkou 267000, China
*
Author to whom correspondence should be addressed.
Received: 19 December 2017 / Revised: 9 January 2018 / Accepted: 17 January 2018 / Published: 19 January 2018
(This article belongs to the Section Electrical Power and Energy System)
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Abstract

In this paper, an adaptively constrained stochastic model predictive control (MPC) is proposed to achieve less-conservative coordination between energy storage units and uncertain renewable energy sources (RESs) in a microgrid (MG). Besides the economic objective of MG operation, the limits of state-of-charge (SOC) and discharging/charging power of the energy storage unit are formulated as chance constraints when accommodating uncertainties of RESs, considering mild violations of these constraints are allowed during long-term operation, and a closed-loop online update strategy is performed to adaptively tighten or relax constraints according to the actual deviation probability of violation level from the desired one as well as the current change rate of deviation probability. Numerical studies show that the proposed adaptively constrained stochastic MPC for MG optimal operation is much less conservative compared with the scenario optimization based robust MPC, and also presents a better convergence performance to the desired constraint violation level than other online update strategies. View Full-Text
Keywords: adaptive control; chance constraints; microgrid; stochastic model predictive control; dispatching adaptive control; chance constraints; microgrid; stochastic model predictive control; dispatching
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Guo, X.; Bao, Z.; Li, Z.; Yan, W. Adaptively Constrained Stochastic Model Predictive Control for the Optimal Dispatch of Microgrid. Energies 2018, 11, 243.

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