NDLI: Analysis and design of a three-phase PLL structure for utility connected systems under distorted utility conditions

Content Provider	IEEE Xplore Digital Library
Author	da Silva, S.A.O. Coelho, E.A.A.
Copyright Year	2004
Description	Author affiliation: Dept. of Electr. Eng., CEFET-PR, Procopio, Brazil (da Silva, S.A.O.)
Abstract	This paper presents a new phase detecting method by using a digital three-phase PLL (phase locked loop) system for utility- connected devices under distorted utility conditions. The PLL systems have been used in several equipment applications such as, UPS systems, active filters, PWM rectifiers, etc, in which phase angle Information of utility voltage is necessary. The PLL system proposed in this work is based on instantaneous power theory. The analysis is performed considering a three-phase stationary reference frame model, which uses the instantaneous active power as the PLL reference. To detect the positive sequence component of the voltage in an unbalance there-phase system, the method of symmetrical coordinates is used. To validate the theoretical analysis a model of the PLL system is presented and its dynamic response, obtained from digital simulation, is discussed considering distorted voltage conditions. Mathematical analysis of the PLL system is made and a design procedure to determine the controller gains is presented.
Starting Page	218
Ending Page	223
File Size	947192
Page Count	6
File Format	PDF
ISBN	0780387902
DOI	10.1109/CIEP.2004.1437585
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-10-17
Publisher Place	Mexico
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Phase locked loops Voltage Pulse width modulation Power system modeling Phase detection Phase distortion Uninterruptible power systems Active filters Rectifiers Performance analysis
Content Type	Text
Resource Type	Article

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