IEEE Power & Energy Magazine - November/December 2020 - 75

©SHUTTERSTOCK.COM/KAMPAN

On Good
Behavior

T

THE INTEGRATION OF INCREASING NUMBERS OF
larger photovoltaic (PV) power plants brings several challenges to traditional distribution system protection. Two
major considerations are managing back-feed and coordinating the inverter response to abnormal conditions.
With the 2018 updates to IEEE Standard 1547, distributed energy resources (DERs) must be able to support the
electric grid during both steady-state and abnormal conditions. The need to continue operating during voltage and
frequency events has focused attention on protection coordination. In this article, we address several practical protection
issues with inverter-connected PV plants, including temporary overvoltage, fault contribution and arc flash, response

Inverter-Grid
Protections
for Integrating
Distributed
Photovoltaics

to feeder open-phase events, and islanding-prevention and
reclosing practices.
We draw on field experiences to identify typical circumstances and issues as well as suggest practices to avoid some
problems and options to mitigate others. In addition, we
discuss DER power monitoring and data collection both for
visibility and as modeling input to predict performance. We
also identify the need for analytic tools to screen islanding
risk, verify settings/responses, and evaluate grounding.

Overvoltage and PV Plants
When islanded from the primary system ground, DERs can
contribute to a ground fault overvoltage (GFO) on unfaulted

By Tom Key, Gefei "Derek" Kou, and Michael Jensen
Digital Object Identifier 10.1109/MPE.2020.3014747
Date of current version: 16 October 2020

november/december 2020

ieee power & energy magazine

75



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IEEE Power & Energy Magazine - November/December 2020

Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - November/December 2020

Contents
IEEE Power & Energy Magazine - November/December 2020 - Cover1
IEEE Power & Energy Magazine - November/December 2020 - Cover2
IEEE Power & Energy Magazine - November/December 2020 - Contents
IEEE Power & Energy Magazine - November/December 2020 - 2
IEEE Power & Energy Magazine - November/December 2020 - 3
IEEE Power & Energy Magazine - November/December 2020 - 4
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IEEE Power & Energy Magazine - November/December 2020 - Cover3
IEEE Power & Energy Magazine - November/December 2020 - Cover4
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