DC-Link Voltage Disturbance Rejection Strategy of PWM Rectifiers Based on Reduced-Order LESO

Pan, Zhi Feng; Wang, Xiaohong; Hoang, Thi Thu Giang; Wang, Zijiang; Li, Tian

doi:10.1109/access.2019.2928226

Cited by 7 publications

(6 citation statements)

References 20 publications

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“…Therefore, the control strategy can effectively suppress the disturbance caused by a change in the power grid voltage. Where h is the differential of the total disturbance and b0=3/(2LC) [30]. According to Eq (8), the total disturbance can be recorded as:…”

Section: A Analysis Of Traditional Ladrc Control Principlementioning

confidence: 99%

Improved Linear Active Disturbance Rejection Control of Photovoltaic Grid Connected Inverter Based on Filter Function

Zhang¹,

Zhou

2021

IEEE Access

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Aiming at the problem of noise easily polluting the voltage measurement link of an inverter DC bus in photovoltaic grid, an improved linear active disturbance rejection control technology based on filter function is constructed by combining linear active disturbance rejection control technology with filter. The core of the method is to expand the filtered voltage into a new state variable and use the linear extended state observer to estimate the filtered voltage, which is used as the feedback quantity, so as to improve the ability of linear active disturbance rejection control technology to suppress high-frequency noise. Then, considering that the output of the system contains noise, the frequency domain characteristics of the improved linear active disturbance rejection control are analyzed theoretically and verified by Bode diagram simulation. Finally, the feasibility and effectiveness of the proposed control strategy are demonstrated by building a simulation platform for grid-connected PV inverter.INDEX TERMS Photovoltaic grid connected system; linear active disturbance rejection control; linear extended state observer; frequency domain.

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Section: A Analysis Of Traditional Ladrc Control Principlementioning

confidence: 99%

Improved Linear Active Disturbance Rejection Control of Photovoltaic Grid Connected Inverter Based on Filter Function

Zhang¹,

Zhou

2021

IEEE Access

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“…The grid voltage is instantaneous constant, the compensation in the inner current loop can be calculated by (25). Then the total current of feed-forward compensation in power-energy compensation control strategy can be obtained.…”

Section: B Feed-forward Compensation Control Strategy Of Current Loomentioning

confidence: 99%

“…Based on the linear active disturbance rejection control (LADRC) strategy proposed by Gao [23] , an observer based controller is proposed to regulate the DC-link voltage of the AC/DC converters against capacitance parameter variation [24] . In [25], considering the bandwidth of the closed-loop current dynamic, this paper presents a novel DC-link voltage control strategy of PWM rectifiers based on the reduced-order linear extended state observer (RLESO). Using a RLESO to observe and even compensate the model variations caused by grid voltage and DC BVF or load disturbance, the proposed method can effectively improve the dynamic performance against grid and load disturbances, as well as for sudden changes in DClink reference voltage.…”

Section: Introductionmentioning

confidence: 99%

Research on SCESS-DFIG DC Bus Voltage Fluctuation Suppression Strategy for Frequency Inertia Regulation of Power Grid

et al. 2020

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The doubly fed induction generator with super capacitor is helpful to enhance the system inertia. At the same time, its structural characteristics are more suitable for the power grid topology without communication lines. However, the change of its topology also brings some problems. In this paper, when SCESS-DFIG is participating in frequency regulation, DC bus voltage fluctuation caused by power imbalance of multiple converters is studied. The dynamic power response of super capacitor with DC-DC converter is a step load for grid side converter. The load of DC bus is nonlinear and random, so the balance and stability of the original system will change accordingly. Because of the complex topology and system composition of the doubly fed induction generator with super capacitor, the conventional feed-forward compensation control strategy can not be used to improve its dynamic response speed. Therefore, this paper designs a control strategy which is applied for DC bus voltage fluctuation of the doubly fed induction generator with super capacitor. The theory proposed in this paper is verified by simulation model and experiment.

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“…The proposed control strategy can well reject the grid voltage disturbances and achieve the good dynamic response. And in [25], another interesting DC-link voltage control strategy based on the reduced-order linear extended state observer is presented, which can compensate the model variations caused by grid voltage and DC-link voltage fluctuations. Therefore, the dynamic performance of the output voltage and current can be also improved.…”

Section: Introductionmentioning

confidence: 99%

Zero Dynamic DC-Link Voltage Control for Current Source Converter Under Grid Disturbances

Yang

Guo

Ding

et al. 2022

IEEE Trans. Power Electron.

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DC-link dynamic is one of the most important issues for current source converters (CSC). In practice, the dc-link voltage suffers from the slow dynamic due to grid disturbances, which will affect the quality of output waveform and damage the converter. Many solutions have been presented to cope with it, but none of them achieve the zero dynamic dc-link voltage control. In order to fill the technical gap, a novel solution is proposed in this paper. Firstly, the impact of grid disturbances on the current source converter (CSC) is discussed with instantaneous power theory and small signal model analysis. Secondly, a new solution is presented to eliminate the adverse impacts of grid disturbances, so as to achieve the zero dynamic dc-link control concept. Meanwhile, the power quality of grid current is improved. Finally, the experiments for the proposed solution under grid disturbances are carried out with TMS320F28335 DSP + XC3400 FPGA digital control hardware platform. The experimental results verify the effectiveness of the proposed solution.

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DC-Link Voltage Disturbance Rejection Strategy of PWM Rectifiers Based on Reduced-Order LESO

Cited by 7 publications

References 20 publications

Improved Linear Active Disturbance Rejection Control of Photovoltaic Grid Connected Inverter Based on Filter Function

Improved Linear Active Disturbance Rejection Control of Photovoltaic Grid Connected Inverter Based on Filter Function

Research on SCESS-DFIG DC Bus Voltage Fluctuation Suppression Strategy for Frequency Inertia Regulation of Power Grid

Zero Dynamic DC-Link Voltage Control for Current Source Converter Under Grid Disturbances

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