@misc{7c410df1a04542eaad3faf3dcb9f0ea6,
title = "Experimental Evaluation of Load Rejection Over-Voltage from Grid-Tied Solar Inverters: NREL (National Renewable Energy Laboratory)",
abstract = "This paper investigates the impact of load rejection over-voltage (LRO) from commercially available grid-tied photovoltaic (PV) solar inverters. LRO can occur when a local feeder or breaker opens and the power output from a distributed energy resource exceeds the load power. Simplified models of current controlled inverters can over-predict over-voltage magnitudes, thus it is useful to quantify testing. The load rejection event was replicated using a hardware testbed at the National Renewable Energy Laboratory (NREL), and a set of commercially available PV inverters was tested to quantify the impact of LRO for a range of generation-to-load ratios. The magnitude and duration of the over-voltage events are reported in this paper along with a discussion of characteristic inverter output behavior. The results for the inverters under test showed that maximum over-voltage magnitudes were less than 200 percent of nominal voltage, and much lower in many test cases. These research results are important because utilities that interconnect inverter-based DER need to understand their characteristics under abnormal grid conditions.",
keywords = "distributed energy, electric power systems, inverter, load rejection over-voltage, photovoltaic, solar",
author = "Austin Nelson and Anderson Hoke and Justin Chebahtah and Trudie Wang and Brian Zimmerly and Michael Ropp and Sudipta Chakraborty",
year = "2015",
language = "American English",
series = "Presented at the 42nd IEEE Photovoltaic Specialists Conference (PVSC-42), 14-19 June 2015, New Orleans, Louisiana",
type = "Other",
}