NDLI: Grid Voltage Synchronization for Distributed Generation Systems Under Grid Fault Conditions

Content Provider	IEEE Xplore Digital Library
Author	Luna, A. Rocabert, J. Candela, J.I. Hermoso, J.R. Teodorescu, R. Blaabjerg, F. Rodriguez, P.
Copyright Year	1972
Abstract	The actual grid code requirements for the grid connection of distributed generation systems, mainly wind and photovoltaic (PV) systems, are becoming very demanding. The transmission system operators (TSOs) are especially concerned about the low-voltage-ride-through requirements. Solutions based on the installation of STATCOMs and dynamic voltage regulators (DVRs), as well as on advanced control functionalities for the existing power converters of distributed generation plants, have contributed to enhance their response under faulty and distorted scenarios and, hence, to fulfill these requirements. In order to achieve satisfactory results with such systems, it is necessary to count on accurate and fast grid voltage synchronization algorithms, which are able to work under unbalanced and distorted conditions. This paper analyzes the synchronization capability of three advanced synchronization systems: the decoupled double synchronous reference frame phase-locked loop (PLL), the dual second order generalized integrator PLL, and the three-phase enhanced PLL, designed to work under such conditions. Although other systems based on frequency-locked loops have also been developed, PLLs have been chosen due to their link with dq0 controllers. In the following, the different algorithms will be presented and discretized, and their performance will be tested in an experimental setup controlled in order to evaluate their accuracy and implementation features.
Sponsorship	IEEE Industry Applications Society
Starting Page	3414
Ending Page	3425
Page Count	12
File Size	1810459
File Format	PDF
ISSN	00939994
Volume Number	51
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Phase locked loops Synchronization Distributed power generation Vectors Reactive power Frequency estimation Voltage fluctuations Frequency locked loops Harmonic analysis Monitoring Electrical Engineering Electric variables measurements synchronization Electric variable measurements electrical engineering frequency estimation frequency-locked loops harmonic analysis monitoring
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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