Decentralized Control for Redundant Parallelism of Uninterruptible Power Supplies with Different Ratings Using Only Current Sensors

Sato, Eduardo Kazuhide; Kawamura, Atsuo

doi:10.1109/pesc.2005.1582033

IEEE 36th Conference on Power Electronics Specialists, 2005.

DOI: 10.1109/pesc.2005.1582033

|View full text |Cite

Decentralized Control for Redundant Parallelism of Uninterruptible Power Supplies with Different Ratings Using Only Current Sensors

Eduardo Kazuhide Sato

Atsuo Kawamura

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Publication Types

Select...

Article2

Relationship

Self Cite0

Independent2

Authors

Journals

Cited by 2 publications

(2 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In order to be effective and efficient, a parallel layout requires the synchronization of all of its units. The goal can be achieved by means of proportional-integral (PI) regulators as in [13] for the parallel operation of redundant uninterruptible power supplies. A quite unique synchronization method for parallel converters also based on PI regulator is proposed by Soldati et al [14]: The distributed control operates directly at pulsewidth-modulation (PWM) level and allows minimizing the circulating current even without filter inductors by relying on the natural parasitic inductance of each converter.…”

mentioning

confidence: 99%

On the Synchronization of Parallel Power Converters via Emulation of Linear Mechanical Oscillators

Dalboni

Soldati

2024

IEEE/ASME Trans. Mechatron.

View full text Add to dashboard Cite

There exist some modular mechanical systems that exhibit inherent synchronization capabilities. Among these, arrays of pendula connected to the same moving platform, under some particular conditions that are analyzed in this work, tend to approach the synchronous in-phase or antiphase motion. Such an appealing behavior can be replicated within modular electronic circuits equipped with multiple power converters to achieve the coordination of all units. The approach consists in recasting the mechanical equations of motion of interconnected pendula to the equivalent electrical circuit by impedance or mobility analogy. This allows obtaining a self-synchronizing network without the need of explicit communication between the modules. The effectiveness of the proposed distributed controller is assessed through experimental tests. Therefore, the fundamental points of novelty are the derivation of two (series and parallel) self-synchronizing electrical linear circuits through analogy with mechanical models and the introduction of a distributed voltage-source controller for parallel operation of converters based on a fully linear model. The proposed methodology is effective for both parallel-output converters with independent inputs (as in microgrid applications) and parallel-input and paralleloutput converters (as in high-current applications).

show abstract

mentioning

confidence: 99%

On the Synchronization of Parallel Power Converters via Emulation of Linear Mechanical Oscillators

Dalboni

Soldati

2024

IEEE/ASME Trans. Mechatron.

View full text Add to dashboard Cite

show abstract

“…In [33], an additional virtual resistance loop is necessary since the inverter output impedance cannot be equal to zero due to the PI controller in voltage control loop. A decentralized control for redundant parallel connection of multiple UPS using only current sensors is proposed [35], [36]. The active and reactive components of output current are used instead of active and reactive power to mimic the droop control, while the LPFs are still necessary.…”

mentioning

confidence: 99%

A New Way of Controlling Parallel-Connected Inverters by Using Synchronous-Reference-Frame Virtual Impedance Loop—Part I: Control Principle

Guan

Guerrero

Zhao

et al. 2016

IEEE Trans. Power Electron.

View full text Add to dashboard Cite

A novel simple and effective autonomous current-sharing controller for parallel three-phase inverters is proposed in this paper. The proposed controller provides faster response and better accuracy in contrast to the conventional droop control, since this novel approach does not require any active or reactive power calculations. Instead, a synchronous-reference-frame (SRF) virtual impedance loop and an SRF-based phase-locked loop are used. Stationary analysis is provided in order to identify the inherent mechanism of the direct and quadrature output currents in relation to the voltage amplitude and frequency with different line impedances by means of the system transfer functions. Comparison experiments from two parallel inverters are presented to compare the control performance of the conventional droop control and the proposed control with different line impedances. In addition, experimental results from a setup with three parallel 2.2 kW inverters verify the effectiveness of the proposed control strategy in different scenarios. Index Terms-Parallel inverters, synchronous reference frame, phase-locked loop, virtual impedance, droop control. I. INTRODUCTION ROOP control method has been widely used in the last decade as the decentralized control of parallel converters in several applications such as parallel redundant uninterruptible power supplies (UPS) to avoid critical communication among units, distributed power systems, microgrids (MGs), and so forth [1]-[12]. This well-known control technique aims to proportionally share active and reactive powers which adjusting frequency and output voltage amplitudes of each inverter locally in order to emulate the behavior of a synchronous generator [3]. Although this technique only requires local information, it presents a number

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Decentralized Control for Redundant Parallelism of Uninterruptible Power Supplies with Different Ratings Using Only Current Sensors

Cited by 2 publications

References 7 publications

On the Synchronization of Parallel Power Converters via Emulation of Linear Mechanical Oscillators

On the Synchronization of Parallel Power Converters via Emulation of Linear Mechanical Oscillators

A New Way of Controlling Parallel-Connected Inverters by Using Synchronous-Reference-Frame Virtual Impedance Loop—Part I: Control Principle

Contact Info

Product

Resources

About