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arXiv · 1903.07339

Data-Enabled Predictive Control for Grid-Connected Power Converters

Linbin Huang·Jeremy Coulson·John Lygeros·Florian Dorfler
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Abstract

We apply a novel data-enabled predictive control (DeePC) algorithm in grid-connected power converters to perform safe and optimal control. Rather than a model, the DeePC algorithm solely needs input/output data measured from the unknown system to predict future trajectories. We show that the DeePC can eliminate undesired oscillations in a grid-connected power converter and stabilize an unstable system. However, the DeePC algorithm may suffer from poor scalability when applied in high-order systems. To this end, we present a finite-horizon output-based model predictive control (MPC) for grid-connected power converters, which uses an N-step auto-regressive-moving-average (ARMA) model for system representation. The ARMA model is identified via an N-step prediction error method (PEM) in a recursive way. We investigate the connection between the DeePC and the concatenated PEM-MPC method, and then analytically and numerically compare their closed-loop performance. Moreover, the PEM-MPC is applied in a voltage source converter based HVDC station which is connected to a two-area power system so as to eliminate low-frequency oscillations. All of our results are illustrated with high-fidelity, nonlinear, and noisy simulations.

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Linbin Huang, Jeremy Coulson, John Lygeros, Florian Dorfler. 2019-03-18. Data-Enabled Predictive Control for Grid-Connected Power Converters. https://arxiv.org/abs/1903.07339

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