Observer-based grid voltage disturbance rejection for grid connected voltage source PWM converters with line side LCL filters

Hoffmann, Nils; Hempel, Michael; Harke, M.C.; Fuchs, Friedrich W.

doi:10.1109/ecce.2012.6342410

Cited by 25 publications

(11 citation statements)

References 23 publications

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“…PCC voltage disturbance Furthermore, as the line-voltages are usually unbalanced and superimposed with harmonics [33], it is advisable to improve disturbance rejection by accurate modelling [34] to ensure sinusoidal current waveforms. Therefore the linevoltages at the PCC are modelled as multiple superimposed ac waveforms in symmetrical components:…”

Section: B Converter and Dc-linkmentioning

confidence: 99%

Finite Control Set Model Predictive Current Control for Grid-Connected Voltage-Source Converters With <italic>LCL</italic> Filters: A Study Based on Different State Feedbacks

Panten

Hoffmann²,

Fuchs

2016

IEEE Trans. Power Electron.

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189

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Section: B Converter and Dc-linkmentioning

confidence: 99%

Finite Control Set Model Predictive Current Control for Grid-Connected Voltage-Source Converters With <italic>LCL</italic> Filters: A Study Based on Different State Feedbacks

Panten

Hoffmann²,

Fuchs

2016

IEEE Trans. Power Electron.

Self Cite

189

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“…. 4) of the characteristic polynomial (13) and the parameters of the discrete-time system (6), the closed-loop dynamics can be set almost arbitrarily within the limits of the accessible control effort and modeling precision. In the following, the analytical expressions are derived.…”

Section: A State-space Controllermentioning

confidence: 99%

“…The characteristic polynomial (13) and the gains formulate a fifth-order system of linear equations [a 0 a 1 a 2 a 3 a 4 ] T = f (Φ, Γ c , K), where the gains are unknowns to be solved and a i are constants. The solution for the gain k 4 is directly obtained as…”

Section: A State-space Controllermentioning

confidence: 99%

“…Thus, the pole-placement accuracy is decreased in [4] and [11]. In order to use state-space control, all the states must be measured or estimated [5], [7]- [10], [12], [13]. The direct discrete-time pole placement would be also convenient method for tuning of the state observer, but no analytical solution in synchronous coordinates has been reported.…”

Section: Introductionmentioning

confidence: 99%

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Observer-based state-space current controller for a grid converter equipped with an LCL filter: Analytical method for direct discrete-time design in synchronous coordinates

Kukkola

Hinkkanen

Zenger

2014

2014 IEEE Energy Conversion Congress and Exposition (ECCE)

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State-space current control enables high dynamic performance of a three-phase grid-connected converter equipped with an LCL filter. In this paper, observer-based state-space control is designed using complex-valued modeling and direct pole placement in the discrete-time domain and in grid-voltage coordinates. The proposed observer reduces the number of measurements in control, and retained connection between the physical parameters and the control algorithms enables automatic tuning. Parameter sensitivity of the control method is analyzed, and experimental results show that the resonance of the LCL filter is well damped.

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“…The extra sensors increase costs and decrease reliability. The number of measurements can be reduced by state estimation [6], [8], [11], [14]- [19]. In addition to state estimation, the grid-voltage sensors are eliminated in [6], [8], [15], [17] and grid-voltage disturbances are estimated in [15], [19].…”

Section: Introductionmentioning

confidence: 99%

Observer-Based State-Space Current Control for a Three-Phase Grid-Connected Converter Equipped With an LCL Filter

Kukkola

Hinkkanen

2014

IEEE Trans. on Ind. Applicat.

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Abstract-This paper presents a state-space current control method for active damping of the resonance frequency of the LCL filter and setting the dominant dynamics of the converter current through direct pole placement. A state observer is used, whereupon additional sensors are not needed in comparison with the conventional L filter design. The relationship between the system delay and instability caused by the resonance phenomenon is considered. Nyquist diagrams are used to examine the parameter sensitivity of the proposed method. The method is validated with simulations and experiments.

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Observer-based grid voltage disturbance rejection for grid connected voltage source PWM converters with line side LCL filters

Cited by 25 publications

References 23 publications

Finite Control Set Model Predictive Current Control for Grid-Connected Voltage-Source Converters With <italic>LCL</italic> Filters: A Study Based on Different State Feedbacks

Finite Control Set Model Predictive Current Control for Grid-Connected Voltage-Source Converters With <italic>LCL</italic> Filters: A Study Based on Different State Feedbacks

Observer-based state-space current controller for a grid converter equipped with an LCL filter: Analytical method for direct discrete-time design in synchronous coordinates

Observer-Based State-Space Current Control for a Three-Phase Grid-Connected Converter Equipped With an LCL Filter

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