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Quantifying the Protectability of Power Systems for Restoration Applications

Conference ·
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With the increasing availability of distributed energy resources, controllable switches, and advanced metering infrastructure, distribution systems are exploring opportunities for improving system reliability through fault location, isolation, and service restoration. During permanent outages, this requires islanding microgrids and/or reconfiguration of the feeders; however, it is critical to assess the protection of the islanded/reconfigured networks before transition because the rated load and fault current conditions change. This paper presents a novel “protectability” metric that quantifies the protection performance and allows the operators to compare the effectiveness of the protection between two or more possible reconfiguration and islanding approaches. We present the mathematical formulation and assumptions for the metric. Multiple configurations of the Electric Power Research Institute J1 feeder, both in grid-connected and weak-sourced islanded operation, are used to demonstrate the performance of the metric with reference to overcurrent protection. Takeaways for future studies on system planning integration are provided.

Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office
DOE Contract Number:
AC36-08GO28308
OSTI ID:
2221861
Report Number(s):
NREL/CP-5D00-84586; MainId:85359; UUID:d4381354-b153-45a8-b2a0-fe87a5aaf50d; MainAdminID:71128
Resource Relation:
Conference: Presented at the the 2023 IEEE Power & Energy Society General Meeting (PESGM), 16-20 July 2023, Orlando, Florida
Country of Publication:
United States
Language:
English

References (7)

Modeling Distributed Energy Resources for Analyzing Distribution Systems with High Renewable Penetration conference April 2022
Lessons learned from microgrid implementation at electric utility conference February 2018
Dynamic Adaptive Protection for Distribution Systems in Grid-Connected and Islanded Modes journal February 2019
A Framework for Coordinated Self-Assembly of Networked Microgrids Using Consensus Algorithms journal January 2022
A new index for evaluating protection vulnerability conference July 2011
Validation of Maui PSCAD Model: Motivation, Methodology, and Lessons Learned conference April 2021
High-Penetration PV Integration Handbook for Distribution Engineers report January 2016

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Related Subjects

POWER TRANSMISSION AND DISTRIBUTION
distributed energy resources
grid-following inverters
grid-forming inverters
inverter-based resources
microgrids
overcurrent protection
protectability