Influences of Power Electronic Converters on Voltage–Current Behaviors During Faults in DGUs—Part II: Photovoltaic Systems

Author

Saleh, S.A. ; Aljankawey, A.S. ; Alsayid, B. ; Abu-Khaizaran, M.S.

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of New Brunswick, Fredericton, NB, Canada

Volume

51

Issue

4

fYear

2015

fDate

July-Aug. 2015

Firstpage

2832

Lastpage

2845

Abstract

Photovoltaic (PV) systems have become a popular type of distributed generation units (DGUs) for small and medium levels of renewable energy generation. When grid connected, these DGUs are designed and operated to deliver electric power to their host grid through power electronic converters. The nonlinear and switched natures, along with the control actions, of these PECs can influence the voltage-current behaviors during faults in grid-connected PV systems. This paper experimentally investigates the voltage-current behaviors during faults occurring in grid-connected PV systems. Results of these investigation show that voltages and currents at the point-of-common-coupling (PCC) experience changes in their magnitudes and harmonic distortions due to faults occurring on both sides of PCC. These results can be incorporated in the improvement of the accuracy and reliability of protective devices used for grid-connected PV systems.

Keywords

distributed power generation; photovoltaic power systems; power convertors; power generation faults; power generation protection; power grids; DGU; PCC; distributed generation units; grid-connected PV systems; harmonic distortions; host grid; photovoltaic systems; point-of-common-coupling; power electronic converters; protective devices; renewable energy generation; voltage-current behaviors; Circuit faults; Fault currents; Grounding; Photovoltaic systems; Power electronics; Switches; Voltage control; Distributed generation units (DGUs); Photovoltaic systems; distributed generation units; photovoltaic (PV) systems; point-of-common-coupling; point-of-common-coupling (PCC); power electronic converters; power electronic converters (PECs); power system faults; protection systems;

fLanguage

English

Journal_Title

Industry Applications, IEEE Transactions on

Publisher

ieee

ISSN

0093-9994

Type

jour

DOI

10.1109/TIA.2014.2387482

Filename

7001202