A Novel Hybrid Finite Control Set Model Predictive Control Scheme With Reduced Switching

Ramírez, Roberto O.; Espinoza, José; Villarroel, Felipe; Maurelia, Eduardo; Reyes, Marcelo

doi:10.1109/tie.2014.2308137

Cited by 83 publications

(37 citation statements)

References 32 publications

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“…In the second case, regarding the commutation harmonics, the main disadvantage is that they can cause unexpected resonances in the electric system, similar to the hysteresis control technique. This issue is not easily solvable and some efforts have been made in order to concentrate the spectra of the resulting waveforms [48,49]. …”

Section: Example 89mentioning

confidence: 99%

Control of Multilevel STATCOMs

Muñoz

Melín

2014

Static Compensators (STATCOMs) in Power Systems

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Control strategies suitable for multilevel STATCOMs are reviewed in this chapter. First of all, the models are systematically deducted and especial emphasis is given to the dynamic and steady state analysis in order to facilitate the study of the control techniques. Then, these control schemes aimed to achieve the overall compensation objectives are classified in linear and nonlinear approaches. In fact, among the linear alternatives, the Proportional-Resonant (PR) and the Proportional-Integral (PI) controllers are presented as feasible ways to achieve zero steady state error in the stationary and the Synchronous Reference Frame (SRF), respectively. For nonlinear strategies, the input/output linearization control technique is applied. Hysteresis and predictive controllers are also discussed as alternatives to control the STATCOM in the stationary abc or α-β frame. The main features of all the aforementioned control techniques will be presented and because the balanced operation of the modules is not natural, dedicated control strategies in charge of balancing the DC side variables, DC voltages for Voltage Source Converters (VSC) and DC currents for Current Source Converters (CSC) based topologies, are shown as an important part of the control of the multilevel STATCOM. Indeed, the inclusion of these dedicated controllers to balance the operation of the different modules is mandatory for multilevel compensators if high performance overall waveforms are required. In order to illustrate the controllers performance operation, key current and voltage waveforms are shown for linear load compensation, using Cascade H-Bridge (CHB), Neutral Point Clamped (NPC) and Multilevel Current Source Converter (MCSC) based STATCOMs.

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Section: Example 89mentioning

confidence: 99%

Control of Multilevel STATCOMs

Muñoz

Melín

2014

Static Compensators (STATCOMs) in Power Systems

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“…Among these, finite‐control‐set model predictive control (FCS‐MPC) is an attractive candidate to ensure excellent performance in steady‐state operation. FCS‐MPC is straightforward to implement and provides the ability to incorporate various operational variables and constraints without affecting the dynamic response . In this method, the prediction values of the controlled variables are estimated for all valid switching states of the converters.…”

Section: Introductionmentioning

confidence: 99%

A performance assessment of model predictive direct power control and model predictive direct current control for switched reluctance motor drive systems

Wang

2018

IEEJ Transactions Elec Engng

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In this paper, a performance assessment between model predictive direct power control and model predictive direct current control is proposed by using a simplified computational approach for switched reluctance motor drive systems. To reduce the calculation efforts, a reduced set of switching states is employed by combining the space vector modulation strategy with the dead-beat predictive control technique. Specifically, an optimal state of the reduced set of switching states is directly selected and applied in neutral point clamped active front-end rectifiers of switched reluctance motor drive systems. In comparison with the conventional method, the proposed scheme takes into account the 27 candidate switching states to 10. The number of admissible switching states is drastically reduced, which saves the execution time by up to 45% for model predictive direct power control and up to 56% for model predictive direct current control. The unwanted exploration for all available voltage vectors can be eliminated while the flying capacitor voltages are maintained balanced. Meanwhile, the use of the well-known modulation methods can be avoided by the proposed strategy, thus enhancing the dynamic performance. Simulation results obtained with the neutral point clamped active front-end rectifiers confirm the efficacy of two proposed methods.

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“…Moreover, this scheme is not effective to mitigate the harmonic currents in a grid-connected inverter in the presence of the distorted grid condition. Other methods considering multiple active voltage vectors during sampling time have been proposed in [20,21]. However, none of these methods have dealt with the presence of harmonic distortion in the grid voltages.…”

Section: Introductionmentioning

confidence: 99%

Finite Control Set–Model Predictive Control with Modulation to Mitigate Harmonic Component in Output Current for a Grid-Connected Inverter under Distorted Grid Conditions

Nguyen

Kim

2017

Energies

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This paper presents an improved current control strategy for a three-phase grid-connected inverter under distorted grid conditions. In terms of performance, it is important for a grid-connected inverter to maintain the harmonic contents of inverter output currents below the specified limit even when the grid is subject to harmonic distortion. To address this problem, this paper proposes a modulated finite control set-model predictive control (FCS-MPC) scheme, which effectively mitigates the harmonic components in output current of a grid-connected inverter. In the proposed scheme, the system behavior in the future is predicted from the system model in the discrete-time domain. Then, the cost function is selected based on the control objective of system. This cost function is minimized during the optimization process to determine the control signals that minimize the cost function. In addition, since the proposed scheme requires pure sinusoidal reference currents in the stationary frame to work successfully, the moving average filter (MAF) is employed to enhance the performance of the traditional phase lock loop (PLL). Due to the control performance of the FCS-MPC scheme as well as the harmonic disturbance rejection capability of the MAF-PLL, the proposed scheme is able to suppress the harmonic distortion even in the presence of distorted grid condition, while retaining fast transient response. Comparative simulation results of different controllers verify the effectiveness of the proposed control scheme in compensating the harmonic disturbance. To validate the practical feasibility of the proposed scheme, the whole control algorithm is implemented on a 32-bit floating-point digital signal processor (DSP) TMS320F28335 to control a 2 kW three-phase grid-connected inverter. As a result, the proposed scheme is a promising approach toward improving the current quality of a grid-connected inverter under distorted grid conditions.

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A Novel Hybrid Finite Control Set Model Predictive Control Scheme With Reduced Switching

Cited by 83 publications

References 32 publications

Control of Multilevel STATCOMs

Control of Multilevel STATCOMs

A performance assessment of model predictive direct power control and model predictive direct current control for switched reluctance motor drive systems

Finite Control Set–Model Predictive Control with Modulation to Mitigate Harmonic Component in Output Current for a Grid-Connected Inverter under Distorted Grid Conditions

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