Dynamic Performance Improving Sliding-Mode Control-Based Feedback Linearization for PV System Under LVRT Condition

Zhang, Yajing; Wang, Jing; Li, Hong; Zheng, Trillion Q.; Lai, Jih‐Sheng; Li, Jianguo; Wang, Jiuhe; Qian, Chen

doi:10.1109/tpel.2020.2983315

Cited by 35 publications

(32 citation statements)

References 42 publications

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“…The major drawback of classic sliding mode control is chattering [31]. This phenomenon occurs due to the basic assumption in variable structure control that the control can be switched from one value to another at each time instant with almost zero delay.…”

Section: Proposed Dynamical Sliding Mode Controlmentioning

confidence: 99%

“…These high-frequency oscillations may excite the un-modelled high-frequency dynamics of the system. Some attempts made on chattering cancelation [31] considered employing continuous functions rather than sign functions. However, such systems resulted in large steady-state errors.…”

Section: Proposed Dynamical Sliding Mode Controlmentioning

confidence: 99%

“…The distributed power generation systems produce harmonics due to the non-linearities in their converters. Moreover, such systems have major output quality issues, mainly due to the fact that the number of systems connected to the inverter is always increasing, indicating the significance of controlling the harmonics generated by these inverters to limit their adverse effects on the output voltage quality [27][28][29][30][31][32][33]. Therefore, to reject harmonics, the controller must be able to provide high-quality sinusoidal output with minimal distortion.…”

Section: Harmonic Rejectionmentioning

confidence: 99%

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Dynamic sliding mode control of single‐stage boost inverter with parametric uncertainties and delay

Mohammadhassani

Narm

2021

IET Power Electronics

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Here, a novel control strategy based on sliding mode control for the single‐stage boost inverter is presented. The goal is to achieve a system with robustness against inherent delays and variations in parameters, fast response, and high‐quality AC voltage. Therefore, according to the idea of current‐mode control, a new type of dynamic sliding mode control (DSMC) is proposed to improve the response performance on various input and parameter operation conditions. In comparison with the conventional controllers, the proposed DSMC utilized only a single loop while presenting attractive features such as robustness against parametric uncertainties and input delay by definition new sliding surfaces. Furthermore, the proposed system has a fast and chattering‐free response, provides an appropriate steady‐state error, good total harmonic distortion (THD), while its implementation is very simple. In a fair comparison with conventional sliding mode control, simulations and laboratory experiments verified satisfactory performance and effectiveness of the DSMC method.

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Section: Proposed Dynamical Sliding Mode Controlmentioning

confidence: 99%

Section: Proposed Dynamical Sliding Mode Controlmentioning

confidence: 99%

Section: Harmonic Rejectionmentioning

confidence: 99%

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Dynamic sliding mode control of single‐stage boost inverter with parametric uncertainties and delay

Mohammadhassani

Narm

2021

IET Power Electronics

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“…In recent years, restrictive sliding mode control (RSMC) has been developed for non-linear systems, offering faster convergence mechanism than conventional SMC with linear sliding surfaces. Based on the fast convergence properties of the terminal attractor, the RSMC can bring the system tracking error to zero in a restricted time and then establish more accurate control, which is suitable for the control of PWM voltage source inverters [ 12 , 13 , 14 ]. However, the RSMC described above still suffers from chatter problem.…”

Section: Introductionmentioning

confidence: 99%

Robust Optimal Control Design for Performance Enhancement of PWM Voltage Source Inverter

et al. 2022

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PWM (pulse-width modulation) voltage source inverters are used in a wide range of AC power systems where the output voltage must be controlled to follow a sinusoidal reference waveform. In order to achieve precision and fast-tracking control, restrictive sliding mode control (RSMC) provides a fast system state convergence time. However, the RSMC still suffers from the chattering problem, which leads to high harmonic distortion and slow response of the inverter output state. Furthermore, the load of the inverter may be severe load changing and the control parameters become difficult to adjust, worsening the adaptability to achieve the desired control of the inverter output. In this paper, a robust optimal control design comprised of an enhanced restrictive sliding mode control (ERSMC) and density particle swarm optimization (DPSO) algorithm is proposed, and then applied to PWM voltage source inverters. The ERSMC not only has finite time convergence but also provides chatter elimination. The DPSO is highly adaptable for acquiring the control parameters of the ERSMC and finding the best solution in the global domain. The proposed controller is realized for the actual PWM voltage source inverter controlled by a TI DSP-based development platform, so that the inverter output voltage has fast dynamic response and satisfactory steady-state behavior despite high load changing and non-linear disturbances.

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“…Though these computational methods are efficient and help in addressing the FRT problems, they enhance the complexity of the system. In light of the aforementioned issues, the modified inverter control techniques are gaining more attention to meet the grid code requirements at a lower cost and better accuracy [28] - [29]. Further, the use of these modified inverter control techniques also aids toward improving the system speed and its dynamic response [30].…”

Section: Introductionmentioning

confidence: 99%

A Comprehensive Review of Control Strategies to Overcome Challenges During LVRT in PV Systems

Joshi¹,

Swami

Jately

et al. 2021

IEEE Access

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Due to the high penetration of grid-connected photovoltaic (GCPV) systems, the network operators are regularly updating the grid codes to ensure that the operation of GCPV systems will assist in maintaining grid stability. Among these, low-voltage-ride-through (LVRT) is an important attribute of PV inverters that allows them to remain connected with the grid during short-term disturbances in the grid voltage. Hence, PV inverters are equipped with control strategies that secure their smooth operation through this ride-through period as per the specified grid code. During the injection of reactive power under LVRT condition, various challenges have been observed, such as inverter overcurrent, unbalance phase voltages at the point of common coupling (PCC), overvoltage in healthy phases, oscillations in active, reactive power and dc-link voltage, distortion in injected currents and poor dynamic response of the system. Several strategies are found in the literature to overcome these challenges associated with LVRT. This paper provides a critical review on the recent challenges and the associated strategies under LVRT conditions in GCPV inverters. The drawbacks associated with the conventional current control strategies are investigated in MATLAB/Simulink environment and each category of the advanced LVRT control strategy is analyzed under different types of grid faults. Moreover, this work categorizes different state-of-the-art LVRT techniques on the basis of synchronization methods, current injection techniques and dc-link voltage control strategies. It is found that the state-of-the-art control strategies like OVSS/OCCIDGS provides improved voltage support and current limitation which results in smooth LVRT operation by injecting currents of enhanced power quality.

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Dynamic Performance Improving Sliding-Mode Control-Based Feedback Linearization for PV System Under LVRT Condition

Cited by 35 publications

References 42 publications

Dynamic sliding mode control of single‐stage boost inverter with parametric uncertainties and delay

Dynamic sliding mode control of single‐stage boost inverter with parametric uncertainties and delay

Robust Optimal Control Design for Performance Enhancement of PWM Voltage Source Inverter

A Comprehensive Review of Control Strategies to Overcome Challenges During LVRT in PV Systems

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