Active Disturbance Rejection Control Based Single Current Feedback Resonance Damping Strategy for LCL-Type Grid-Connected Inverter

Ma, Weijiao; Guan, Yuanpeng; Zhang, Bo; Wu, Lihao

doi:10.1109/tec.2020.3006151

Cited by 41 publications

(21 citation statements)

References 33 publications

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“…The LCL type grid-connected inverter has inherent resonance spikes. By optimizing the parameters [3][4][5][6], adopting active damping control [7][8][9][10][11], and reasonably designing voltage and current control loop bandwidth [12], the resonance of a single inverter is suppressed and its grid-connected performance is improved. In practice, the filter and control side parameters are generally designed based on the ideal grid without considering the grid impedance of the actual grid as well as background harmonic voltage.…”

Section: Introductionmentioning

confidence: 99%

Resonance analysis of multiple grid‐connected inverters’ series and parallel network

Ruan³

2022

IET Renewable Power Gen

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Multiple inverters are connected to the distribution network with complex non-linear loads and may interact with the background harmonics in some cases. In addition to the parallel resonance caused by the harmonic current, the harmonic voltage also causes the series resonance. The matching of frequencies of the resonance voltage and current results in serious distortion of the grid-connected bus voltage waveform, or even threatens the stability of its operating point. A general method to analyze the network series and parallel resonance of multiple grid-connected inverters is yet to be proposed. In view of this, the authors provide an inverter model and an analytical method to traverse all the resonance points. Two typical control inverters were modelled under the transfer function model, and the defects of the traditional modal analysis method in traversing the series resonance were analyzed. Then, the authors propose to use an improved modal analysis method by adding virtual branches for resonance analysis. The obtained analytical results are consistent with the frequency sweeping results and simulation results, verifying the effectiveness of the proposed method. In order to prove the generality of the proposed method for traversing the series and parallel resonance of multiple grid-connected inverters, the inverter to suppress background harmonics of the grid voltage was incorporated into the multiple inverters network for case study. Using the improved modal analysis method to traverse the series and parallel resonance, the participation factor values of each node and loop under resonance mode were calculated. Finally, the proposed method was verified by hardware-in-the-loop simulation, and the result shows its universality.

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Section: Introductionmentioning

confidence: 99%

Resonance analysis of multiple grid‐connected inverters’ series and parallel network

Ruan³

2022

IET Renewable Power Gen

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“…On the other hand, the latter one is sensitive to parameter variations as it needs prior information about grid impedance; but it is less expensive to implement [1]. To address those issues, active damping schemes based on the active disturbance rejection control method [8] and dual-current active damping control strategy [4,9] are proposed, but complicated computing procedures are experienced for obtaining the parameters of the methods. Moreover, grid impedance variation has always been a major concern.…”

Section: Introductionmentioning

confidence: 99%

An Improved Dynamic Control and Resonance Damping for Voltage Source Inverters in Microgrids Through a Novel Active Damping Technique

Zhang¹,

Bitew²,

Zheng³

et al. 2022

EPES

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Microgrids have the potential to provide customers with improved power quality and reliability. However, there are technical challenges related to the operation and control of microgrids and the distributed energy source (DERs) that constitute them. Resonance caused by the low-pass filters connected to the voltage source inverters of the DERs is one of those issues in the operation of microgrids. This paper proposes a novel technique of Active Damping Algorithm (ADA) for resonance damping and improving the dynamic stability of a microgrid composed of multiple converter-interfaced DERs. The paper considers two cases; one is where the resistor and the filter capacitor are connected in parallel, and the other is where they are connected in series. The proposed active damping method is based on output current feedback with automatically calculated and adjusted damping coefficients to suppress resonance. The proposed method was verified through simulation and experimental tests carried out using PSCAD/EMTDS and an operational microgrid in Beijing, China. The results from both the experiment and simulation analysis showed that the devised method was able to achieve the intended target; where the filter resonance is effectively surpassed and the voltage and frequency dynamic responses are quite stable and within the acceptable range during large power changes in the microgrid system.

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“…The key advantage of this controller is that it can maintain the original fast dynamic response achieved by feedback control even in the presence of external perturbation and model mismatch. Literature [20] proposed a control strategy based on active disturbance rejection control by selecting grid-side current as the unique feedback signal. The inverter possesses stronger robustness against parameter fluctuation after the adoption of extended state observer which can mathematically transforms the inverter downgrade to a simple gain module.…”

Section: Introductionmentioning

confidence: 99%

Grid Current Feedback Active Damping Control Based on Disturbance Observer for Battery Energy Storage Power Conversion System with LCL Filter

Gao

Lin

et al. 2021

Energies

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Adopting the battery energy storage system is an effective way to compensate the continuously growing fluctuating power generated by renewable sources. The power conversion system is considered as one of the core equipment used for interfacing battery packs to the grid in a battery energy storage system. This paper aims to apply an improved active damping control to a grid-tied power conversion system with LCL filter to attenuate its inherent resonance characteristics. The anti-interference ability is enhanced by estimating the second-order derivation of grid-injected current based on a modified disturbance observer. Meanwhile, the negative effects of parameter mismatch are equivalent to unmeasurable disturbances, which are possible to be compensated by subtracting the estimated values from the modulated voltage references. Moreover, the design method and robustness issue of the disturbance observer are discussed in detail. The presented control algorithm is implemented based on Simulink and dSpace. Detailed simulation results are provided, which can verify the feasibility and correctness of control strategy. Furthermore, an experimental prototype rated at 2.3 kW/110 V is constructed. The experimental results confirm that the presented control method is effective to be applied in the power conversion system (PCS).

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Active Disturbance Rejection Control Based Single Current Feedback Resonance Damping Strategy for LCL-Type Grid-Connected Inverter

Cited by 41 publications

References 33 publications

Resonance analysis of multiple grid‐connected inverters’ series and parallel network

Resonance analysis of multiple grid‐connected inverters’ series and parallel network

An Improved Dynamic Control and Resonance Damping for Voltage Source Inverters in Microgrids Through a Novel Active Damping Technique

Grid Current Feedback Active Damping Control Based on Disturbance Observer for Battery Energy Storage Power Conversion System with LCL Filter

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