Synchronous frame and resonant adaptive observers as disturbance estimators and their applications in power electronics

Miskovic, Vlatko; Blasko, V.; Jahns, T.M.; Lorenz, Robert D.; Romenesko, Charles; Zhang, Haojiong

doi:10.1109/ecce.2014.6953544

Cited by 5 publications

(6 citation statements)

References 7 publications

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“…From adaptation point of view, it is reasonable to approximate the full-order observer dynamics using quasi-steady-state gains. These gains are obtained forũ g andθ in (13) and (16), respectively, by making z = 1. It follows that…”

Section: Quasi-steady-state Analysismentioning

confidence: 99%

“…Sensorless synchronization has been obtained using the instantaneous power theory [4] and virtual flux models [5], [6]. Alternatively, the grid voltage can be estimated using observers [7]- [13]. Solutions relying on the Kalman filter have been proposed [7]- [9].…”

Section: Introductionmentioning

confidence: 99%

“…Adaptive observers have been used for estimation of the rotor speed, position, and flux magnitude in motor drives, e.g., in [14], and, correspondingly, for estimation of the grid-voltage frequency, angle, and magnitude in gridconnected converters [8], [10]- [13]. The estimation error of the converter current includes the information of the gridvoltage angle and amplitude [11], [12].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

State observer for sensorless control of a grid-connected converter equipped with an LCL filter: Direct discrete-time design

Kukkola

Hinkkanen

2015

2015 IEEE Energy Conversion Congress and Exposition (ECCE)

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Please cite the original version:Kukkola, Jarno & Hinkkanen, Marko. 2015 All material supplied via Aaltodoc is protected by copyright and other intellectual property rights, and duplication or sale of all or part of any of the repository collections is not permitted, except that material may be duplicated by you for your research use or educational purposes in electronic or print form. You must obtain permission for any other use. Electronic or print copies may not be offered, whether for sale or otherwise to anyone who is not an authorised user. Abstract-Synchronization with the power system is an essential part of control of grid-connected converters. This paper proposes a grid-voltage sensorless synchronization and control scheme for a grid-connected converter equipped with an LCL filter, measuring only the converter currents and the DC voltage. A discrete-time pole-placement design method is used to formulate an adaptive full-order observer for estimation of the angle and magnitude of the grid voltage. The analytically derived design is experimentally validated, and the results demonstrate rapid convergence of the estimated angle and magnitude.

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Section: Quasi-steady-state Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

State observer for sensorless control of a grid-connected converter equipped with an LCL filter: Direct discrete-time design

Kukkola

Hinkkanen

2015

2015 IEEE Energy Conversion Congress and Exposition (ECCE)

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show abstract

“…Sensorless synchronization has been obtained using the instantaneous power theory [4] and virtual flux models [6], [7]. Alternatively, the grid voltage can be estimated using observers [8]- [14]. Solutions relying on the Kalman filter have been proposed [8]- [10].…”

Section: Introductionmentioning

confidence: 99%

“…Adaptive observers have been used for estimation of the rotor speed, position, and flux magnitude in motor drives, e.g., in [17], and, correspondingly, for estimation of the grid-voltage frequency, angle, and magnitude in gridconnected converters [9], [11]- [14]. The estimation error of the converter current includes the information of the gridvoltage angle and amplitude [12], [13].…”

Section: Introductionmentioning

confidence: 99%

State Observer for Grid-Voltage Sensorless Control of a Converter Equipped With an LCL Filter: Direct Discrete-Time Design

Kukkola

Hinkkanen

2016

IEEE Trans. on Ind. Applicat.

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Abstract-Synchronization with the power system is an essential part of control of grid-connected converters. This paper proposes a grid-voltage sensorless synchronization and control scheme for a converter equipped with an LCL filter, measuring only the converter currents and the DC voltage. A discrete-time pole-placement design method is used to formulate an adaptive full-order observer for estimation of the frequency, angle, and magnitude of the grid voltage. The proposed discrete-time design method enables straightforward implementation and suits low sampling rates better than its continuous-time counterpart. The analytically derived design is experimentally validated, and the results demonstrate rapid convergence of the estimated quantities. Moreover, the experimental tests show that grid-voltage sensorless operation is possible under balanced and unbalanced grid disturbances and distorted grid conditions.

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Robust sensorless control of grid connected converters with LCL line filters using frequency adaptive observers as AC voltage estimators

Miskovic

Blasko

Jahns

et al. 2016

2016 IEEE Applied Power Electronics Conference and Exposition (APEC)

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Synchronous frame and resonant adaptive observers as disturbance estimators and their applications in power electronics

Cited by 5 publications

References 7 publications

State observer for sensorless control of a grid-connected converter equipped with an LCL filter: Direct discrete-time design

State observer for sensorless control of a grid-connected converter equipped with an LCL filter: Direct discrete-time design

State Observer for Grid-Voltage Sensorless Control of a Converter Equipped With an LCL Filter: Direct Discrete-Time Design

Robust sensorless control of grid connected converters with LCL line filters using frequency adaptive observers as AC voltage estimators

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