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Title: Experimental Determination of PV Inverter Response to Grid Phase Shift Events: Preprint

Abstract

With the continued growth of renewable energy resources which interface to the electric grid via inverters, the understanding of such devices becomes ever more important to the safe and reliable operation of the bulk power system. This work investigates the specific response of a utility-scale PV inverter to grid voltage phase shift-type disturbances which sometimes occur during grid fault events. The role of the PV inverter's phase-locked-loop (PLL) is identified as important to modeling the response. Switching-level simulations of a utility-scale PV inverter with a modeled PLL show a characteristic response when phase shift disturbances require the PLL to track what appear as fast frequency changes. Additionally, in this work a full-scale laboratory testing was carried out using the Opal real time (RT) OP5142 real time simulator and a large grid simulator to create phase shift disturbances with a high degree of repeatability. A photovoltaic (PV) inverter was connected to a grid simulator, and phase shifts were instantaneously implemented on the simulated grid, the results of the currents were then obtained. The experimental results obtained were validated with simulation results obtained from MATLAB/Simulink.

Authors:
 [1]; ORCiD logo [2]
  1. University of Pittsburgh
  2. National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Electricity Delivery and Energy Reliability (OE)
OSTI Identifier:
1569202
Report Number(s):
NREL/CP-5D00-70496
DOE Contract Number:  
AC36-08GO28308
Resource Type:
Conference
Resource Relation:
Conference: Presented at the 2018 IEEE Power and Energy Society General Meeting, 5-9 August 2018, Portland, Oregon
Country of Publication:
United States
Language:
English
Subject:
24 POWER TRANSMISSION AND DISTRIBUTION; DER; frequency response; harmonics; inverter; photovoltaics; T&D

Citation Formats

Aworo, Oluwafemi J., and Mather, Barry A. Experimental Determination of PV Inverter Response to Grid Phase Shift Events: Preprint. United States: N. p., 2019. Web. doi:10.1109/PESGM.2018.8586118.
Aworo, Oluwafemi J., & Mather, Barry A. Experimental Determination of PV Inverter Response to Grid Phase Shift Events: Preprint. United States. doi:10.1109/PESGM.2018.8586118.
Aworo, Oluwafemi J., and Mather, Barry A. Thu . "Experimental Determination of PV Inverter Response to Grid Phase Shift Events: Preprint". United States. doi:10.1109/PESGM.2018.8586118. https://www.osti.gov/servlets/purl/1569202.
@article{osti_1569202,
title = {Experimental Determination of PV Inverter Response to Grid Phase Shift Events: Preprint},
author = {Aworo, Oluwafemi J. and Mather, Barry A},
abstractNote = {With the continued growth of renewable energy resources which interface to the electric grid via inverters, the understanding of such devices becomes ever more important to the safe and reliable operation of the bulk power system. This work investigates the specific response of a utility-scale PV inverter to grid voltage phase shift-type disturbances which sometimes occur during grid fault events. The role of the PV inverter's phase-locked-loop (PLL) is identified as important to modeling the response. Switching-level simulations of a utility-scale PV inverter with a modeled PLL show a characteristic response when phase shift disturbances require the PLL to track what appear as fast frequency changes. Additionally, in this work a full-scale laboratory testing was carried out using the Opal real time (RT) OP5142 real time simulator and a large grid simulator to create phase shift disturbances with a high degree of repeatability. A photovoltaic (PV) inverter was connected to a grid simulator, and phase shifts were instantaneously implemented on the simulated grid, the results of the currents were then obtained. The experimental results obtained were validated with simulation results obtained from MATLAB/Simulink.},
doi = {10.1109/PESGM.2018.8586118},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {9}
}

Conference:
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