An Adaptive Model Predictive Voltage Control for LC-Filtered Voltage Source Inverters

Gholami-Khesht, Hosein and Davari, Pooya and Blaabjerg, Frede (2021) An Adaptive Model Predictive Voltage Control for LC-Filtered Voltage Source Inverters. Applied Sciences, 11 (2). p. 704. ISSN 2076-3417

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Abstract

The three-phase inductor and capacitor filter (LC)-filtered voltage source inverter (VSI) is subjected to uncertain and time-variant parameters and disturbances, e.g., due to aging, thermal effects, and load changes. These uncertainties and disturbances have a considerable impact on the performance of a VSI’s control system. It can degrade system performance or even cause system instability. Therefore, considering the effects of all system uncertainties and disturbances in the control system design is necessary. In this respect and to tackle this issue, this paper proposes an adaptive model predictive control (MPC), which consists of three main parts: an MPC, an augmented state-space model, and an adaptive observer. The augmented state-space model considers all system uncertainties and disturbances and lumps them into two disturbance inputs. The proposed adaptive observer determines the lumped disturbance functions, enabling the control system to keep the nominal system performance under different load conditions and parameters uncertainty. Moreover, it provides load-current-sensorless operation of MPC, which reduces the size and cost, and simultaneously improves the system reliability. Finally, MPC selects the proper converter voltage vector that minimizes the tracking errors based on the augmented model and outputs of the adaptive observer. Simulations and experiments on a 5 kW VSI examine the performance of the proposed adaptive MPC under different load conditions and parameter uncertainties and compare them with the conventional MPC.

Item Type: Article
Subjects: GO STM Archive > Engineering
Depositing User: Unnamed user with email support@gostmarchive.com
Date Deposited: 12 Jan 2023 11:59
Last Modified: 02 Jun 2024 13:42
URI: http://journal.openarchivescholar.com/id/eprint/39

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