A New Predictive Control Strategy for Multilevel Current-Source Inverter Grid-Connected

Estévez-Bén, Adyr A.; Tapia, Héctor Juan Carlos López; Carrillo-Serrano, Roberto V.; Rodríguez‐Reséndiz, Juvenal; Nava, Nimrod Vázquez

doi:10.3390/electronics8080902

Cited by 14 publications

(8 citation statements)

References 36 publications

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“…1. According to the inverter output voltage and grid voltage, the inverter output current in one control cycle is calculated, as shown in (8).…”

Section: Proposed Current Ripples Predictionmentioning

confidence: 99%

Archives of Electrical Engineering

2022

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In the finite control set model predictive control (FCS-MPC) strategy of the grid-tied inverter, the current ripple (CR) affects the selection of optimal voltage vectors, which leads to the increase of output current ripples. In order to solve this problem, this paper proposes a CR reduction method based on reference current compensation (RCC) for the FCS-MPC strategy of grid-tied inverters. Firstly, the influence of the CR on optimal voltage vector selection is analyzed. The conventional CR prediction method is improved, which uses inverter output voltage and grid voltage to calculate current ripples based on the space state equation. It makes up for the shortcomings that the conventional CR prediction method cannot predict in some switching states. The improved CR method is more suitable for the FCS-MPC strategy. In addition, the differences between the two cost functions are compared through visual analysis. It is found that the sensitivity of the square cost function to small errors is better than that of the absolute value function. Finally, the predicted CR is used to compensate the reference current. The compensated reference current is substituted into the square cost function to reduce the CR. The experimental results show that the proposed method reduces the CR by 47.3%. The total harmonic distortion (THD) of output current is reduced from 3.86% to 2.96%.

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“…1. According to the inverter output voltage and grid voltage, the inverter output current in one control cycle is calculated, as shown in (8).…”

Section: Proposed Current Ripples Predictionmentioning

confidence: 99%

Archives of Electrical Engineering

2022

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“…Alfredo Alvarez-Diazcomas et al [12] proposed a bidirectional, multiple-input DC-DC converter topology which allows the interaction of the energy sources with a wide range of voltages. Adyr A. Estévez-Bén et al [13] presented a new predictive-control strategy for the multilevel, current-source inverters' topology to simplify the calculation. Héctor López et al [14] presented a five-switch, common-mode, current-source inverter for grid-connected applications, and the control scheme reduces the current leakage in photovoltaic systems.…”

Section: Introductionmentioning

confidence: 99%

Power Dispatching of Multi-Microgrid Based on Improved CS Aiming at Economic Optimization on Source-Network-Load-Storage

Wang

Zhao

et al. 2022

Electronics

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The multi-microgrid is gradually springing up with widespread use of the distributed generation. It is of great meaning to have research on the energy mutual optimization of the multi-microgrid to improve the new energy-consumption capacity. In this paper, a comprehensive economic model of the multi-microgrid is proposed for optimizing the power dispatching, and the source-network-load-storage is taken into account. Different from other studies, the special novelty of this paper is the improved cuckoo search (CS) algorithm which is adopted to optimize the power dispatching of the multi-microgrid. Comparing with the particle swarm optimization (PSO) algorithm, the improved CS algorithm has better performance in solving the proposed model. The optimal power supply strategy is determined by predicting the optimal state of charge of the battery in the model of the multi-microgrid. The model effectiveness of the multi-microgrid is confirmed in the case study of Wangjiazhai area. With this method, the optimal power dispatching is determined.

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“…To compensate for this drawback, Z-source inverters (ZSI) have been proposed which can operate in either voltage or current source modes [8]. They employ both buck and boost operations in one single-stage topology [9], using fewer switching devices [7], which results in a simple design and a high efficiency [10]. The shoot-through state of the ZSI is triggered by charging/discharging of capacitors and inductors in an X-shaped impedance circuit [11].…”

Section: Introductionmentioning

confidence: 99%

Data-Driven Model-Free Adaptive Control of Z-Source Inverters

Asadi

Ahmadi

Mohammadi

et al. 2021

Sensors

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The universal paradigm shift towards green energy has accelerated the development of modern algorithms and technologies, among them converters such as Z-Source Inverters (ZSI) are playing an important role. ZSIs are single-stage inverters which are capable of performing both buck and boost operations through an impedance network that enables the shoot-through state. Despite all advantages, these inverters are associated with the non-minimum phase feature imposing heavy restrictions on their closed-loop response. Moreover, uncertainties such as parameter perturbation, unmodeled dynamics, and load disturbances may degrade their performance or even lead to instability, especially when model-based controllers are applied. To tackle these issues, a data-driven model-free adaptive controller is proposed in this paper which guarantees stability and the desired performance of the inverter in the presence of uncertainties. It performs the control action in two steps: First, a model of the system is updated using the current input and output signals of the system. Based on this updated model, the control action is re-tuned to achieve the desired performance. The convergence and stability of the proposed control system are proved in the Lyapunov sense. Experiments corroborate the effectiveness and superiority of the presented method over model-based controllers including PI, state feedback, and optimal robust linear quadratic integral controllers in terms of various metrics.

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A New Predictive Control Strategy for Multilevel Current-Source Inverter Grid-Connected

Cited by 14 publications

References 36 publications

Archives of Electrical Engineering

Archives of Electrical Engineering

Power Dispatching of Multi-Microgrid Based on Improved CS Aiming at Economic Optimization on Source-Network-Load-Storage

Data-Driven Model-Free Adaptive Control of Z-Source Inverters

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