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Constrained Control of Low-Capacitance Delta Cascaded H-Bridge StatComs: A Model Predictive Control Approach.
- Source :
-
IEEE Transactions on Power Electronics . Dec2021, Vol. 36 Issue 12, p14312-14328. 17p. - Publication Year :
- 2021
-
Abstract
- This article presents a constrained model predictive control (MPC) strategy for a three-phase low-capacitance static compensator (LC-StatCom) with delta configuration. The controller consists of an outer loop that provides dynamic references for the active grid current component and the circulating current; whereas, the inner predictive loop minimizes the quadratic error of state variables subject to operating limit conditions, thus providing optimal control signals that produce a fast response while guaranteeing the prescribed safe operating limit conditions. The article also proposes an enhanced discrete-time model, which uses intersample values, that improves the accuracy of the model predictions when the sampling rate is not high enough to assume constant state variables. As a result, it facilitates the implementation of MPC on less powerful processors compared to the conventional modeling. The proposed control is especially suited for the LC-StatComs since it incorporates analytical computation of desired steady-state trajectories, which takes into account the induced oscillation on the capacitor voltages that are inherent to the LC-StatComs. The proposed approach has been verified by simulation and experimentally with a laboratory prototype. [ABSTRACT FROM AUTHOR]
- Subjects :
- *PREDICTION models
*CAPACITORS
*VOLTAGE control
*TRANSIENT analysis
Subjects
Details
- Language :
- English
- ISSN :
- 08858993
- Volume :
- 36
- Issue :
- 12
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Power Electronics
- Publication Type :
- Academic Journal
- Accession number :
- 153188024
- Full Text :
- https://doi.org/10.1109/TPEL.2021.3085880