Decentralized Model-Based Predictive Control for DER Units Integration in AC Microgrids Subject to Operational and Safety Constraints

The dynamic performance of a microgrid is governed by the decentralized primary control strategy that is embedded in each of its hosted Distributed Energy Resource (DER) units. The primary control computes the voltage synthesized by the interfacing voltage-sourced converter such that the DER unit co...

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Bibliographic Details
Published inIEEE transactions on power delivery Vol. 36; no. 4; pp. 2479 - 2489
Main Authors Perez-Ibacache, Ricardo, Cedeno, Angel L., Silva, Cesar A., Carvajal, Gonzalo, Aguero, Juan C., Yazdani, Amirnaser
Format Journal Article
LanguageEnglish
Published New York IEEE 01.08.2021
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Constrained model predictive control
Constraints
converter current saturation
converter voltage saturation
Converters
distributed energy resources
Distributed generation
Electric potential
Energy sources
Frequency control
Integrated circuit modeling
islanding and grid-connected mode
Microgrids
Optimization
Power system dynamics
Predictive control
Safety
Short circuits
Voltage
voltage and frequency regulation
Voltage control
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Summary:The dynamic performance of a microgrid is governed by the decentralized primary control strategy that is embedded in each of its hosted Distributed Energy Resource (DER) units. The primary control computes the voltage synthesized by the interfacing voltage-sourced converter such that the DER unit contributes active and reactive powers in support of the microgrid voltage amplitude and frequency. These operational requirements must be satisfied with respect to the converter safety and physical limitations, such as the limited magnitude of the converter output current and terminal voltage. In this paper, all the control requirements mentioned above are taken into account in a single constrained optimization problem using the framework of Model-based Predictive Control (MPC). Solving the primary control problem in this way allows the microgrid to respond to major disturbances such short-circuit faults and transitions between modes of operation, while the electronically-interfaced DER units operate within operational and safety limits.
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ISSN:0885-8977
1937-4208
DOI:10.1109/TPWRD.2020.3037716