NDLI: Improved passivity-based control method and its robustness analysis for single-phase uninterruptible power supply inverters

Content Provider	IET Digital Library
Author	Komurcugil, Hasan
Abstract	An improved passivity-based control (IPBC) method is proposed for single-phase uninterruptible power supply inverters. The proposed IPBC method is based on energy shaping and damping injection idea which is performed for regulating the energy flow of inverter to a desired level and assure global asymptotic stability, respectively. It is shown that the control of output voltage can be accomplished indirectly provided that the inductor current tracks its reference. Since the estimated parameters do not match with the actual parameters in practice, a perfect tracking without any output voltage error is not possible. To reduce the influence of parameter mismatch on the output voltage, an outer voltage loop is added into the feedback path of conventional passivity-based control (PBC) method. The robustness of both PBC methods has been investigated and analytical expressions in terms of estimated and actual parameters are derived for the output voltage. The effectiveness of the IPBC method in terms of both robustness and harmonic distortion is verified by the simulations and experiments under resistive and diode rectifier loads. The results demonstrate that the IPBC method not only leads to good quality output voltage with a reasonably low harmonic distortion, but also offers a global asymptotic stable operation with a strong robustness to wide range of parameter mismatch.
Starting Page	1558
Ending Page	1570
Page Count	13
ISSN	17554535
Volume Number	8
e-ISSN	17554543
Issue Number	Issue 8, Aug (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/8/8
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2014.0706
Journal	IET Power Electronics
Publisher Date	2015-03-31
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Control of Electric Power System Conventional Passivity-based Control Method Conventional PBC Method Damping Injection Diode Rectifier Load Energy Flow Regulation Energy Shaping Feedback Path Global Asymptotic Stability Harmonic Distortion Harmonics Improved Passivity-based Control Method Inductor Current Invertors IPBC Method Outer Voltage Loop Output Voltage Control Parameter Estimation Parameter Mismatch Influence Reduction Power Electronics Power Supply Power Supply Quality Resistive Load Robustness Analysis Single-phase Uninterruptible Power Supply Inverter Supervisory Circuit Uninterruptible Power Supplies Voltage Control
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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