Next Article in Journal
Fall Detection for Elderly from Partially Observed Depth-Map Video Sequences Based on View-Invariant Human Activity Representation
Next Article in Special Issue
Special Issue on Advancing Grid-Connected Renewable Generation Systems
Previous Article in Journal
Analyses of the Effect of Cycle Inlet Temperature on the Precooler and Plant Efficiency of the Simple and Intercooled Helium Gas Turbine Cycles for Generation IV Nuclear Power Plants
Previous Article in Special Issue
A Review of Flywheel Energy Storage System Technologies and Their Applications
Open AccessArticle

Zero-Voltage Ride-Through Capability of Single-Phase Grid-Connected Photovoltaic Systems

1
Department of Electrical Engineering, School of Automation, Northwestern Polytechnical University, Xi’an 710072, China
2
Department of Energy Technology, Aalborg University, Aalborg 9220, Denmark
*
Author to whom correspondence should be addressed.
Academic Editor: Allen Barnett
Appl. Sci. 2017, 7(4), 315; https://doi.org/10.3390/app7040315
Received: 10 December 2016 / Revised: 13 March 2017 / Accepted: 20 March 2017 / Published: 24 March 2017
(This article belongs to the Special Issue Advancing Grid-Connected Renewable Generation Systems)
Distributed renewable energy systems play an increasing role in today’s energy paradigm. Thus, intensive research activities have been centered on improving the performance of renewable energy systems, including photovoltaic (PV) systems, which should be of multiple-functionality. That is, the PV systems should be more intelligent in the consideration of grid stability, reliability, and fault protection. Therefore, in this paper, the performance of single-phase grid-connected PV systems under an extreme grid fault (i.e., when the grid voltage dips to zero) is explored. It has been revealed that combining a fast and accurate synchronization mechanism with appropriate control strategies for the zero-voltage ride-through (ZVRT) operation is mandatory. Accordingly, the representative synchronization techniques (i.e., the phase-locked loop (PLL) methods) in the ZVRT operation are compared in terms of detection precision and dynamic response. It shows that the second-order generalized integrator (SOGI-PLL) is a promising solution for single-phase systems in the case of fault ride-through. A control strategy by modifying the SOGI-PLL scheme is then introduced to single-phase grid-connected PV systems for ZVRT operation. Simulations are performed to verify the discussions. The results have demonstrated that the proposed method can help single-phase PV systems to temporarily ride through zero-voltage faults with good dynamics. View Full-Text
Keywords: single-phase photovoltaic (PV) system; grid synchronization; phase-locked loop (PLL); zero-voltage ride-through (ZVRT); grid fault single-phase photovoltaic (PV) system; grid synchronization; phase-locked loop (PLL); zero-voltage ride-through (ZVRT); grid fault
Show Figures

Figure 1

MDPI and ACS Style

Zhang, Z.; Yang, Y.; Ma, R.; Blaabjerg, F. Zero-Voltage Ride-Through Capability of Single-Phase Grid-Connected Photovoltaic Systems. Appl. Sci. 2017, 7, 315.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop