Energy storage and market rules
Jalal Official (royalthree)
on
January 13, 2022
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Energy
storage is experiencing a boom in popularity.
In the U.S. Energy Storage Monitor Q4 2018,
it is estimated that 338 megawatts were
installed in 2018, and this will grow to 3.9
gigawatts in 2023, most of them front-of-the-
meter utility-scale projects.
The surge
in this exponential growth has been driven by
state mandates and regulatory actions
(especially in California) and limited to
vertically integrated utilities outside of
the organized power markets that serve two-
thirds of all consumers of electricity in the
United States. Despite storage's importance
to the grid, it has not been a success in
wholesale markets despite its potential.
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There are
two words that best describe this mismatch:
rules and revenue. Wholesale market rules are
structured around legacy assets, which means
that storage is unable to sell all potential
services, which in turn limits storage's
wholesale revenue streams.
Having
recognized these obstacles, the Federal
Energy Regulatory Commission (FERC) issued
Order 841 as a means of encouraging wholesale
market access. On December 31, 2018, FERC's
regulated independent system operators (ISOs)
filed their implementation plans with the
agency.
Energy
Storage Association provides helpful insight
into what these proposals are all about,
including filtered comments according to
their effects on possible revenue streams.
In
organized power markets, storage is able to
generate revenue in three ways: platforms,
products, and payouts. In the sense that
different projects tap these potential
revenue streams in different ways, the
implementation plans for Order 841 will
affect them in various ways.
The most important thing to
remember is to plan ahead.
ISOs
conduct planning processes to identify
opportunities for new transmission to improve
reliability or market efficiency, and storage
is increasingly being thought of as a lower-
cost, non-transmission alternative for
improving reliability.
Here is an
example: A relatively isolated area on the
grid needs to prepare for the possibility of
losing a transmission line or a local
generator during peak demand. By building
storage rather than adding transmission or
local generation, the local grid can be able
to survive in the face of emergency
situations. There is a possibility that
the project could be built and paid for on a
cost-of-service basis, financed through
transmission charges approved by the
regulatory authorities.
A storage
project here plays the same role as a
reliability transmission expansion project,
but it can also be viewed as a transmission
project with the purpose of moving surplus
energy to constrained areas and lowering
prices as a result. I believe this was part
of FERC Order 1000's vision, which mandated
regional transmission operators to consider
"non-transmission alternatives" as part of
the planning process.
However,
only one economic storage-as-transmission
project is known to have been proposed under
an Order 1000 solicitation within any ISO
territory today, a project that is located
near Baltimore on the PJM grid. After PJM
evaluated the project, it concluded the
project did not meet the required cost-
benefit threshold and was therefore not
included in the grid operator's Regional
Transmission Expansion Plan.
As a
result, ISOs have hesitated to fund such
projects, because, while "reliability"
storage is tied to an definite grid emergency
risk, which determines its use, "economic"
storage requires ISOs to give instructions on
when to buy and sell power. As a result,
ISO's might be challenged in their market
independence since how they dispatch their
storage invariably affects their prices,
which could make them look like self-dealing
market participants.
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