NDLI: Evaluation of an STSMO-based estimator for power control of rotor-tied DFIG systems

Content Provider	IET Digital Library
Author	Mbukani, Mwana Wa Kalaga Gule, Nkosinathi
Abstract	In this study, a sensorless vector control strategy of a rotor-tied doubly fed induction generator (RDFIG) system based on the association of the phase-locked loop (PLL) estimator and the super-twisting sliding mode observer (STSMO) is proposed and analysed. The proposed sensorless control strategy utilises the stator current and the back-electromotive force (EMF) as state variables. The advantage of the proposed sensorless control strategy is that the estimation process is conducted before the machine is connected to the grid. The slip angle/speed is extracted from the estimated back-EMF space vector by using a PLL. The parameters of the STSMO are selected such that the Lyapunov stability criteria are fulfilled and that fast response is achieved. The robustness of the proposed position/speed sensorless control strategy is validated through steady state and dynamic experimental measurements on a 5.5 kW custom-designed grid-connected mode RDFIG test bench based on a National Instruments PXIe-8115 controller.
Starting Page	1871
Ending Page	1882
Page Count	12
ISSN	17518660
Volume Number	13
e-ISSN	17518679
Issue Number	Issue 11, Nov (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-epa/13/11
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-epa.2019.0035
Journal	IET Electric Power Applications
Publisher Date	2019-04-10
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Acceleration Angular Velocity Control Asynchronous Generator Asynchronous Machine Back-EMF Space Vector Closed Loop System Control of Electric Power System Demodulator Discriminators And Mixers Estimation Process Grid-connected Mode RDFIG Test Bench Induction Generator System Lyapunov Method Mechanical Variables Control Modelling And Identification Modulator Multivariable Control System National Instrument PXIe-8115 Controller Observers Phase Locked Loop Phase-locked Loop Estimator PLL Position Control Position Sensorless Control Strategy Power 5.5 KW Power And Energy Control Power Control Power Grid Power System Control Reactive Power Control Rotation Control Rotor-tied DFIG System Rotors Sensorless Machine Control Sensorless Vector Control Strategy Simulation Sliding Mode Observer Spatial Variables Control Speed Sensorless Control Strategy Stability in Control Theory Stators STSMO-based Estimator Torque Control Variable Structure System Velocity Wind Power Plant
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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