Sliding Mode Fixed Frequency Current Controller Design for Grid-Connected NPC Inverter

Sebaaly, Fadia; Vahedi, Hani; Kanaan, Hadi Y.; Moubayed, Nazih; Al‐Haddad, Kamal

doi:10.1109/jestpe.2016.2586378

Cited by 91 publications

(44 citation statements)

References 41 publications

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“…To mitigate these issues, numerous seminal solutions have been proposed in various literature. These approaches are commonly based on a variety of advanced nonlinear controllers, including sliding mode control (SMC) [5][6][7][8], model predictive control [9][10][11], neural networks control [12], ect., bearing in mind the distinct features of nonlinear algorithms [13]. In this work, the focus is the SMC method owing to its superior ability to deal with nonlinear problems [14,15].…”

Section: Introductionmentioning

confidence: 99%

A High-Gain Observer-Based Adaptive Super-Twisting Algorithm for DC-Link Voltage Control of NPC Converters

et al. 2020

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Acting as an interface between the grid and many energy systems, the active front-end (AFE) has been widely used in a large variety of industrial applications. In this paper, in order to ensure the fast dynamic performance and good disturbance rejection ability of the AFE, a high-gain observer (HGO) plus adaptive super-twisting algorithm (STA) for the three-level neutral-point-clamped (NPC) converter is proposed. Comparing with the conventional PI control strategy, the proposed controller implements the adaptive STA in the voltage regulator to provide a faster transient response. The gains of the adaptive STA keep varying according to the rules being reduced in steady state but increasing in transient conditions. Therefore, the chattering phenomenon is mitigated and the dynamic response is guaranteed. Additionally, to undermine the impact of external disturbances on the dc-link voltage, a high-efficiency HGO is designed in the voltage regulation loop to reject it. Experimental results based on a three-level NPC prototype are given and compared with the conventional PI method to validate the fast dynamic performance and high disturbance rejection ability of the proposed approach.

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Section: Introductionmentioning

confidence: 99%

A High-Gain Observer-Based Adaptive Super-Twisting Algorithm for DC-Link Voltage Control of NPC Converters

et al. 2020

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“…Currently, sliding mode control (SMC) theory is widely introduced in power electronic converters control [33][34][35][36]. In grid-tied PV systems, SMC is employed for different purposes such as: to modify the voltage control loop of VO-MPPT [22,23], or internal current loop of VOC [36]. The application of SMC offers high control performance in addition to simple experimental implementation [33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

“…To reduce this phenomenon, numerous research works use the saturation as switching function [22]. In [23,36] the error between the selected variable and its reference has been used as input for switching surface. However, a steady-state error (SSE) remains.…”

Section: Introductionmentioning

confidence: 99%

A Robust Control of Two-Stage Grid-Tied PV Systems Employing Integral Sliding Mode Theory

et al. 2018

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This contribution considers an improved control scheme for three-phase two-stage grid-tied photovoltaic (PV) power systems based on integral sliding mode control (ISMC) theory. The proposed control scheme consists of maximum power point tracking (MPPT), DC-Link voltage regulation and grid current synchronization. A modified voltage-oriented maximum power point tracking (VO-MPPT) method based on ISMC theory is proposed for design of an enhanced MPPT under irradiation changes. Moreover, a novel DC-Link voltage controller based on ISMC theory is proposed to achieve good regulation of DC-Link voltage over its reference. To inject the generated PV power into the grid with high quality, a voltage-oriented control based on space vector modulation (SVM) and ISMC (VOC-ISMC-SVM) has been developed to control the grid current synchronization. Numerical simulations are performed in a MATLAB/Simulink TM (R2009b, MathWorks, Natick, MA, USA) environment to evaluate the proposed control strategy. In comparison with conventional control schemes, the developed control strategy provides an accurate maximum power point (MPP) tracking with less power oscillation as well as a fast and an accurate DC-Link regulation under varying irradiation conditions. Moreover, the transfer of the extracted power into the grid is achieved with high quality.

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“…In various industrial application areas, such as electrical drives, renewable energy generation, smart grids, and distributed generation (DGs) units, neutral point clamped active front‐end (NPC‐AFE) rectifiers are often used to connect the electrical system to the grid for applications in medium‐voltage high‐power (MV‐HP) drive systems . Compared to the conventional diode rectifiers, NPC‐AFEs offer several advantages including power flow from the source to the load and, vice versa, operation with unity power factor, independent control of active and reactive powers, and high‐quality voltage and current delivery to the load, among others.…”

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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Sliding Mode Fixed Frequency Current Controller Design for Grid-Connected NPC Inverter

Cited by 91 publications

References 41 publications

A High-Gain Observer-Based Adaptive Super-Twisting Algorithm for DC-Link Voltage Control of NPC Converters

A High-Gain Observer-Based Adaptive Super-Twisting Algorithm for DC-Link Voltage Control of NPC Converters

A Robust Control of Two-Stage Grid-Tied PV Systems Employing Integral Sliding Mode Theory

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

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