Active Disturbance Rejection Control of <i>LCL</i>-Filtered Grid-Connected Inverter Using Padé Approximation

Benrabah, Abdeldjabar; Xu, Dianguo; Gao, Zhiqiang

doi:10.1109/tia.2018.2855128

Cited by 82 publications

(32 citation statements)

References 29 publications

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“…The ADRC estimates all the exogenous and endogenous disturbances, as a value called the lumped disturbance, in the system with the model-independent extended state observer (ESO), which is the main part of ADRC, and compensates them in the control law [19]. The reduction of the resonance harmonics for the LCL filter type GCI was investigated with ADRC in [20][21][22].…”

Section: Literature Reviewmentioning

confidence: 99%

Active Disturbance Rejection Control Scheme for Reducing Mutual Current and Harmonics in Multi-Parallel Grid-Connected Inverters

Saleem

Kim

et al. 2019

Energies

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With the increasing penetration of renewable energy sources into modern power systems, parallel inverters with LCL filters are commonly employed in the grid interface, giving rise to potential resonance problems. Among the different resonances, interactive resonance is triggered by interaction among inverters when different current references are applied to parallel inverters. It may also feature a mutual current that circulates among inverters instead of flowing into the grid and introduces harmonics or instability in the control system. In this paper, active disturbance rejection control based on a reduced-order extended state observer (RESO) was proposed for parallel inverters. With the proposed scheme, the interaction between inverters is considered as an exogenous disturbance caused by other parallel inverters, estimated by the RESO, and rejected by the controller. In the results, the mutual current and interactive harmonics, calculated via fast Fourier transform, were reduced with the proposed control scheme. Thus, the lower total harmonic distortion of each current was achieved. Additionally, the robust stability and less model-dependent control design are the other additive advantages over the derivative filtered capacitor voltage feedforward-based active damping using PI control. The simulation and real-time experimental results of the conventional and proposed scheme, obtained using the hardware-in-loop, were presented to verify the theoretical analysis under the similar and different current reference cases.

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Section: Literature Reviewmentioning

confidence: 99%

Active Disturbance Rejection Control Scheme for Reducing Mutual Current and Harmonics in Multi-Parallel Grid-Connected Inverters

Saleem

Kim

et al. 2019

Energies

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“…In general, the relationship between ω o and ω c is ω o = 3 ∼ 10ω c [10], in this paper, however, it is ω o = 6ω c . If the control effect needs to be further optimized, the influence of each parameter in [34] on the decoupling and stability of the system can be obtained. This paper only gives a conclusion:…”

Section: Controller Designmentioning

confidence: 99%

A Novel Strategy Based on Linear Active Disturbance Rejection Control for Harmonic Detection and Compensation in Low Voltage AC Microgrid

et al. 2019

Energies

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In an AC microgrid, harmonic distortion is mainly caused by power electronic equipment and nonlinear loads. In this paper, linear active disturbance rejection control (LADRC) is used to control the fundamental current at the point of common coupling (PCC). Meanwhile, an active power filter (APF) is added to eliminate the harmonic current generated by the nonlinear loads. The tracking differentiator (TD) in active disturbance rejection control (ADRC) serves as a low-pass filter (LPF) in the harmonic detection algorithm of APF. Compared to traditional harmonic detection algorithms, the improved strategy solves the contradiction between rapidity, accuracy, and overshoot of filtering. LADRC has good performance of disturbance rejection, internal decoupling, and accessible parameters tuning. It can observe the internal uncertainty and external disturbance of the system as the total disturbance through the extended state observer (ESO), and compensate it in time through state feedback to make the system achieve the desired performance. The abilities of resonance suppression for LCL-type filter and internal decoupling of LADRC demonstrates its advantages through frequency domain analysis and simulation. The proposed strategy was simulated in MATLAB/SIMULINK and realized in the experimental hardware platform, and the effectiveness of the proposed strategy is approved.

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“…The effectiveness of ADRC has been tested in many industrial applications and theoretical case studies such as motion control [28], grid connected inverter [29], buck converter [30], permanent magnet synchronous motor [31] and ALSTOM gasifier benchmark problem [32]. Zheng and Gao [33] summarise the performance of ADRC in several practical applications such as motion control and web tension regulation.…”

Section: Introductionmentioning

confidence: 99%

Active disturbance rejection control of DC–DC boost converter: a review with modifications for improved performance

Ahmad

Ali

2019

IET Power Electronics

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This study provides a comprehensive review of existing active disturbance rejection control (ADRC) techniques for the control of non-minimum phase (NMP) DC-DC boost converter (DBC). A boost converter presents a challenging control task due to its non-linear and NMP dynamics while operating in continuous conduction mode. ADRC schemes, specifically those that claim improved performance for NMP systems, have been experimentally evaluated for voltage control of DBC. Additionally, a new way of incorporating known system dynamics into the control structure is proposed through a modified scheme. An averaged non-linear model of DBC is used in the simulation to analyse the effectiveness of control schemes and the results are experimentally validated on hardware. It is shown that the proposed method outperforms the reported model-assisted ADRC techniques while utilising only the system pole information.

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Active Disturbance Rejection Control of LCL-Filtered Grid-Connected Inverter Using Padé Approximation

Cited by 82 publications

References 29 publications

Active Disturbance Rejection Control Scheme for Reducing Mutual Current and Harmonics in Multi-Parallel Grid-Connected Inverters

Active Disturbance Rejection Control Scheme for Reducing Mutual Current and Harmonics in Multi-Parallel Grid-Connected Inverters

A Novel Strategy Based on Linear Active Disturbance Rejection Control for Harmonic Detection and Compensation in Low Voltage AC Microgrid

Active disturbance rejection control of DC–DC boost converter: a review with modifications for improved performance

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