A Discrete-Time Repetitive Sliding Mode Control for Voltage Source Inverters

Zheng, Ling; Jiang, Fayang; Song, Jiancheng; Gao, Yunguang; Tian, Mingliang

doi:10.1109/jestpe.2017.2781701

Cited by 73 publications

(40 citation statements)

References 31 publications

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“…General structure of three-phase grid-connected VSI with an LCL filter chattering issue and Ref. [21] proposed an exponential based bi-power reaching law to enhance the robustness to parameter fluctuation and load variation. Combined with these control methods, this paper presents a model-based discrete SMC.…”

Section: Introductionmentioning

confidence: 99%

Model‐Based Discrete Sliding Mode Control with Disturbance Observer for Three‐Phase LCL‐Filtered Grid‐Connected Inverters

Huang

et al. 2020

IEEJ Transactions Elec Engng

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Grid‐connected voltage source inverters with LCL filters have been widely used for distributed generation systems in renewable energy systems. The presence of LCL resonance influences the overall performance and complicates the system control design, especially when the uncertainties caused by the component parameter variations and disturbances are considered. In order to improve the system performance under uncertain conditions, this paper presented a model‐based discrete sliding mode control (SMC) with disturbance observer (DOB) for three‐phase LCL‐filtered grid‐connected inverters. In this work, the inverter model is modified by using a virtual damping resistor to eliminate the resonance of the LCL filter and improve the stability, even consider the variations of the grid impedance. To save the sensors and predict the forward step of the state variables, a discrete state observer is adopted in the control. To enhance the robustness of the system, a DOB is designed in the SMC controller to estimate the disturbances so that the system uncertainties can be effectively compensated. Finally, comparative simulations and experiments are constructed to demonstrate the effectiveness of the proposed method. © 2020 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

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Section: Introductionmentioning

confidence: 99%

Model‐Based Discrete Sliding Mode Control with Disturbance Observer for Three‐Phase LCL‐Filtered Grid‐Connected Inverters

Huang

et al. 2020

IEEJ Transactions Elec Engng

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“…In implementations, the existent harmonics of the DC source can introduce more noncharacteristic harmonics because of the finite DC bus capacitance and other realistic applicable conditions. A multicell cascade inverter structure was introduced in [22] and a repetitive control structure was illustrated in [23][24][25]. In all of these structures, the THD value is around 2.23%-8.8% for voltage and especially current signals.…”

Section: Introductionmentioning

confidence: 99%

THD minimization for Z-source-based inverters with a novel sinusoidal PWMswitching method

Ghaderi¹

2019

Turk J Elec Eng & Comp Sci

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This paper presents a modified sinusoidal pulse width modulation (SPWM) switching method for one-phase and investigated two-phase impedance-source inverter structures. The proposed structure generates pulses for a quasi-Z-source converter and this block produces a unilateral voltage sine wave in the block's output. This signal is applied to the inverter as its input wave. For this purpose, the novel SPWM method is proposed for power switches while being switched complementarily. Two power switches are used in the structure to generate the pure sinusoidal output voltage and to minimize total harmonic distortion (THD), which is an essential parameter in inverter design. The results show that the proposed method generates the pure sinusoidal voltage and current signals for resistive and inductive loads and pure voltage and improved current waves for capacitive loads in comparison with existing techniques, since the THD of the output voltage and current signals is strongly affected by the dynamic loads. This method leads to final cost improvement and reduction of the size of the system with fewer number of components, which are essential parameters for renewable energy resource applications. A mathematical model is validated with the 2017a version of MATLAB/Simulink and 1.51% and 1.33% THD values are reported for low and high power loads, respectively, in the one-phase structure and 0.95% and 0.87% in the two-phase system. Finally, a 120 W prototype has been implemented and tested. A sine-wave with 620 Vac peak to peak amplitude and 50 Hz frequency has been gained in the inverter's output and the quality of the voltage and current waveforms has been evaluated for different two 1.8 k Ω and 600 Ω resistive loads in the one-phase structure. Experimental results confirm all mathematical and simulation results.

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“…Due to the advantages of simple structure, easy digital implementation, strong ability to suppress harmonic interference, the repetitive controller is widely used in the control of inverters [3], [19], [20]. A control method consists of the SMC and the repetitive control is proposed in [21] to enhance the system robustness. However, the tuning of the low-pass filters and phase compensator is complicated.…”

Section: Introductionmentioning

confidence: 99%

Control Strategy Based on $\text{H}\infty$ Repetitive Controller With Active Damping for Islanded Microgrid

Ouyang

Zhang

et al. 2019

IEEE Access

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To overcome the drawbacks of the proportional plus integral (PI) control based strategy, i.e., limitation for harmonic suppression and performance deterioration under load variation, a voltage control strategy based on the H∞ repetitive controller with inverter-side current feedback damping is proposed for the inverter in islanded microgrid. The H∞ repetitive controller provides good robustness against parameter perturbation and ensures the output voltage of low total harmonic distortion. Compared with other damping methods, a good resonance suppression and a better attenuation of the high-order harmonics can be achieved under the proposed strategy, which further improves the control performance of the voltage repetitive control system. A state space model including the damping coefficient is built to implement order reduction of the high-order controller, thereby simplifying the digital implementation while nearly without performance degradation. Moreover, the frequency response analysis shows that the order reduction can improve the adaptability of the controller to parameter variation. Finally, experiments and simulations verify the correctness of the analysis. INDEX TERMS H∞ repetitive controller, microgrid, total harmonic distortion (THD), inverter, active damping.

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A Discrete-Time Repetitive Sliding Mode Control for Voltage Source Inverters

Cited by 73 publications

References 31 publications

Model‐Based Discrete Sliding Mode Control with Disturbance Observer for Three‐Phase LCL‐Filtered Grid‐Connected Inverters

Model‐Based Discrete Sliding Mode Control with Disturbance Observer for Three‐Phase LCL‐Filtered Grid‐Connected Inverters

THD minimization for Z-source-based inverters with a novel sinusoidal PWMswitching method

Control Strategy Based on $\text{H}\infty$ Repetitive Controller With Active Damping for Islanded Microgrid

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