Journal ArticleDOI
Switching Frequency Reduction Using Model Predictive Direct Current Control for High-Power Voltage Source Inverters
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TLDR
A novel current control approach called model predictive direct current control (MPDCC) is presented, which takes into account the discrete states of the voltage source inverter (VSI), and the current errors are predicted for each sampling period.Abstract:
In this paper, a novel current control approach called model predictive direct current control (MPDCC) is presented. The controller takes into account the discrete states of the voltage source inverter (VSI), and the current errors are predicted for each sampling period. Voltage vectors are selected by a graph algorithm, whereby the most appropriate vector is chosen based on an optimization criterion. However, this depends on whether the state of the system is transient or steady. In the first case, the current error should be minimized as fast as possible in order to obtain fast dynamics. In the latter one, the VSI switching behavior is optimized since the switching losses account for a large amount of the total converter losses in high-power drive systems. MPDCC has been developed for a general neutral-point isolated resistive-inductive load with an internal voltage source. For demonstration, the presented control strategy has been implemented on a small-scale permanent-magnet synchronous machine drive system with a two-level VSI. This new approach has several advantages. The most important one is that the switching frequency is reduced up to 70% compared to linear control combined with pulsewidth modulation. Second, MPDCC obtains fast dynamic responses, which are already known from, e.g., direct torque control.read more
Citations
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Journal ArticleDOI
Band-Based Multi-Step Predictive Torque Control Strategy for PMSM Drives
TL;DR: A band-based multi-step predictive torque control (BM-PTC) strategy for permanent magnet synchronous motor (PMSM) drives that can reduce the switching frequency by more than 37% while ensuring high performance.
Journal ArticleDOI
Predictive Common-Mode Voltage Suppression Method Based on Current Ripple for Permanent Magnet Synchronous Motors
TL;DR: A variable FCS scheme based on current ripple can be suppressed under the premise that the current distortion is small, and the switching frequency is not significantly increased, and it can be well balanced under different load conditions by setting the relative error limits.
Proceedings ArticleDOI
Short-circuit fault protection strategy of parallel three-phase inverters
TL;DR: In this article, a five-stage fault protection scheme against the short-circuit fault for parallel high-power three-phase combined inverter to achieve high reliability is proposed, where the pre-synchronized state is added to achieve the current sharing at any time and to achieve simultaneous mode change for each inverter.
Symmetric Constrained Optimal Control: Theory, Algorithms, and Applications
TL;DR: In this article, the authors developed the theory of symmetry for constrained linear systems and used it to design model predictive controllers with reduced complexity, which can significantly reduce the memory requirements of explicit model predictive control.
Proceedings ArticleDOI
Model-predictive control of grid-connected inverters for PV systems with flexible power regulation and switching frequency reduction
TL;DR: In this article, a model-predictive direct power control (MPDPC) strategy for a grid-connected inverter used in a PV system is presented, which is aimed at use in distributed generation.
References
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Book
Predictive Control With Constraints
TL;DR: A standard formulation of Predictive Control is presented, with examples of step response and transfer function formulations, and a case study of robust predictive control in the context of MATLAB.
Journal ArticleDOI
A New Quick-Response and High-Efficiency Control Strategy of an Induction Motor
Isao Takahashi,Toshihiko Noguchi +1 more
TL;DR: In this article, the authors proposed a limit cycle control of both flux and torque using optimum PWM output voltage; a switching table is employed for selecting the optimum inverter output voltage vectors so as to attain as fast a torque response, as low an inverter switching frequency, and as low harmonic losses as possible.
Journal ArticleDOI
Current control techniques for three-phase voltage-source PWM converters: a survey
TL;DR: Current control techniques for three-phase voltage-source pulsewidth modulated converters, including bang-bang (hysteresis, delta modulation) controllers and predictive controllers with on-line optimization are reviewed.
Journal ArticleDOI
Model Predictive Control—A Simple and Powerful Method to Control Power Converters
TL;DR: The feasibility and great potential of FCS-MPC due to present-day signal-processing capabilities, particularly for power systems with a reduced number of switching states and more complex operating principles, such as matrix converters are found.
Journal ArticleDOI
Predictive Control in Power Electronics and Drives
TL;DR: A simple classification of the most important types of predictive control is introduced, and each one of them is explained including some application examples.