IEEE Power & Energy Magazine - March/April 2021 - 79

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The Fragile Grid
The Physics and Economics of Security
Services in Low-Carbon Power Systems

W

WORLDWIDE, THERE ARE UNSTOPPABLE FORCES
toward low-carbon power systems that can support the fight
against climate change and help solve the security of supply
issues in many countries. Low-carbon grids are likely to be
characterized by substantial renewable energy sources, both
centralized and distributed, combined with intelligent and
dynamic demand-side technology and multisector electrification (including heating, transport, and future fuels). In this
context, successfully resolving the " affordability-sustainability-reliability " energy trilemma is crucial for paving the
way to low-carbon energy futures.
When looking at the " reliability " pillar of the trilemma, it
becomes apparent that these transformations are of unprecedented scale and pose significant threats to operational security. Many of these are currently being experienced in the
Australian National Electricity Market (NEM), which has

one of the highest instantaneous renewable energy penetrations in the world, with 75% projected by 2025.
Due to changes in the physical characteristics of the system and in the supply- and demand-side resources connected
to it, low-carbon grids might be more intrinsically fragile
and, therefore, both less secure and less resilient. The system's new physics has a profound impact on its economics
too-in the requirements for security services and in the
technical, commercial, regulatory, and policy measures to
procure such services. These aspects are thoroughly discussed in the rest of this article.

Low-Carbon Grids: Technical
Challenges and Mitigation Options
Several technical challenges are being experienced in systems that are increasingly operating with large shares of

By Pierluigi Mancarella and Farhad Billimoria
Digital Object Identifier 10.1109/MPE.2020.3043570
Date of current version: 19 February 2021

march/april 2021

1540-7977/21©2021IEEE

ieee power & energy magazine

79


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IEEE Power & Energy Magazine - March/April 2021

Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - March/April 2021

Contents
IEEE Power & Energy Magazine - March/April 2021 - Cover1
IEEE Power & Energy Magazine - March/April 2021 - Cover2
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IEEE Power & Energy Magazine - March/April 2021 - Cover3
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