Paper Info
Title
Generalized Integrator-Extended State Observer With Applications to Grid-Connected Converters in the Presence of Disturbances
Abstract
Large-scale fast-varying sinusoidal disturbances (FVSDs) strongly impact the operation of Grid-connected Converters (GcCs). A conventional extended state observer (ESO) is not sufficiently capable to deal with these rapid disturbances. This critical weakness has limited ESO's applications to GcCs. Therefore, a generalized integrator-ESO (GI-ESO) is developed from ESO to address such issues. Knowing that grid common disturbances can be expressed as a phase, frequency, or magnitude disturbed sinusoidal signal, multi-GIs of selective resonant frequencies are, hence, applied into the disturbance estimation loop, which enables FVSD to be observed with relatively low bandwidth. Besides, a frequency-adaptive mechanism is introduced in order to mitigate the effects of frequency deviations. The proposed GI-ESO resolves the tradeoff between the observer's bandwidth and noise filtering. A case of the three-phase phase-locked loop control system of disturbed regimes is, in particular, studied to assess the performance of GI-ESO and the stability of the resulting controlled system. Theoretical analysis and experimental results have proven its effectiveness in applications to GcCs in the presence of various disturbances.
Year
DOI
Venue
2021
10.1109/TCST.2020.2981571
IEEE Transactions on Control Systems Technology
Keywords
DocType
Volume
Extended state observer (ESO),fast-varying sinusoidal disturbances (FVSDs),frequency-adaptive mechanism,generalized integrator (GI),grid-connected converters (GcCs),phase-locked loop (PLL)
Journal
29
Issue
ISSN
Citations 
2
1063-6536
1
PageRank 
References 
Authors
0.35
1
5
Name
Order
Citations
PageRank
Baoling Guo121.99
Seddik Bacha25317.58
Mazen Alamir311435.25
Ahmad Hably411216.79
Cedric Boudinet510.35