Pipes & Wires
From the editor’s desk…
Welcome
to Pipes & Wires #196. This issue starts with a look at some global trends
in energy storage, and then how cost over-runs on capital works might be
limited. We then look at some changing regulatory models, the rejection of an
acquisition bid, and two regulatory determinations. This issue closes with a
look at the draft report on closure options for Liddell Power Station in Australia.
So …
until next month, happy reading…
What we’re seeing…
Energy mix & grid security · Capacity and configuration of legacy
networks are limiting renewable penetration and decarbonisation. · Many events revealing that high
penetration of renewables is undermining grid security. · Increasing interest in nuclear to
provide both reliable and low emission generation. · Legal moves challenging the treatment
of forest bio-mass as renewable. · Heightened anxiety to get the carbon
price more precisely determined to unleash the next wave of decarbonisation
investment. · Diverging and seemingly inconsistent
views on the role of coal for dry-year security (less frequent, but more
critical). · Emerging battle between storing
solar, or over-building and curtailing · Charging EV’s with solar during the
day, and then use them to flatten the peaks. · Increasingly mixed messages about
closing down coal-fired stations to reduce emissions on the one hand, and
keeping them open to improve grid security on the other hand. · Inquiries and reviews that are
prompted by security of supply scares having their official terms of
reference subordinate security of supply to reducing CO2
emissions. · Legacy thermal generation facing
steeper evening ramping rates as solar hollows out the daily demand profile. · Heightened appreciation of
coal-firing capability during gas supply interruptions. |
Regulating emerging technologies · Increasing numbers of US state
regulators removing EV chargers from the definition of public utility. · Policy makers exhibiting specific
technologies biases, particularly between batteries and gas turbines. · A possibly diminished role for gas
turbines as grid peaks are de-layered to allow more insightful use of
batteries. · Regulators defining multiple classes
of services and payment categories for battery storage. |
Network access and price regulation · Increasing regulatory rejection of
grid modernization, EV charger and smart meter proposals. · What seems like regulatory push-back
against the large transmission lines required to interconnect wind-farms. · A possible step change in direction
from the previous trend of regulators squeezing fixed monthly charges to
legislation specifically allowing solar tariffs. · Some regulators warming to the idea
of allowing a “sand pit” for electric companies to play with emerging
technology ideas in, and allowing recovery of the reasonable costs of that
playing. · A mixed bag of revenue determinations
… some tougher than expected, some easier. |
General stuff · A potential decoupling of electricity
prices from gas prices as the influence of gas on the marginal electricity
price declines. · A possible need for a managed market
to strengthen certainty of gas supply. · The possibility of gas becoming
industry’s transition fuel away from coal. · More investment signals moving faster
and in different directions. · Increasing political awareness of the
need for a smooth transition that will minimise price shocks. · Mounting concern over the structural
integrity of many hydro dams, including the ability to fully de-water. · Heightening concern around foreign
ownership of essential infrastructure. · Diversified electric companies
reducing their exposure to volatile energy revenues and increasing their
exposure to predictable lines revenue (the opposite of what was fashionable a
few years ago). · A shortage of skilled project
managers and electricity network designers. |
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Cool video clips
Building
power stations (1940’s)
This 6
minute video examines the
building and subsequent operation of thermal power stations in the 1940’s. The grid
operating principles are still similar, just more automated.
Western Power Electricity Historical
Society
This cool website has heaps of stuff about
electricity and electric transport in the south-west of England for the last
120 years … articles, videos, audio casts etc. Thanks to Phil West (ex-WPD) for
pointing this out.
Technologies and techniques
Global – gravity might challenge Lithium-ion for storage
Introduction
The idea of gravity storage isn’t new … we’ve been
using pumped storage to store energy, but that seems to have been overtaken by
improving battery technologies. This article takes a more conceptual look at
the whole storage thing, and then examines mountain gravity storage.
The storage cycle
Until the last decade or so it wasn’t practical to
store electricity in big lumps, so it had to be stored as primary energy.
Pumped storage is an obvious example, which apparently began in Italy and
Switzerland as far back as the 1890’s and improved as reversible turbines and
variable speed drives were developed. Then came improved battery technologies
(particularly Lithium-ion), which arguably combined with increased sensitivity
around developing hydro sites led to the decline of pumped storage. Until now.
A look at mountain gravity storage
A key limitation of batteries is their ability to
store energy for months on end to arbitrage seasons eg. store
solar electricity for winter heating. It appears that mountain gravity energy storage (essentially boxes of sand hauled up a railroad track using off-peak
electricity, and then generating peak-period electricity by running down hill)
could have the following features…
· Ability to store energy up to several years.
· Possibly able to operate on a larger scale than batteries.
· Potentially able to compete with Lithium-ion batteries on price,
possibly as low as $50 to $100 per MWh of stored energy.
· Assist the integration of variable renewables (using surplus wind and
solar to haul up to the top).
· Be more cost effective than pumped hydro storage in the 1 to 20 MW
capacity range.
So … interesting … the cycle from storing primary
energy to storing electricity back to storing primary energy.
Global – declining battery prices and emerging chemistries
Introduction
Most of us are well aware that batteries are rapidly
shifting on 2 dimensions … prices ($/kWh) are declining, and chemistries are
also rapidly changing with a key dimension being increasing energy density
(kWh/kg). This article notes recent price declines and presents some views on
where prices and chemistries might go.
The decline in battery prices
Battery prices have declined broadly as follows…
Year |
Price ($/kWh) |
2010 |
1,100 |
2013 |
800 |
2016 |
300 |
2019 |
156 |
Prices are expected to further decline as follows…
Year |
Price ($/kWh) |
2023 |
100 |
2025 |
87 |
2030 |
60 |
These prices show a diminishing decline in Lithium-Ion
battery prices, however it wouldn’t be unreasonable to assume that Lithium-Ion
will be overtaken by other chemistries ie. disrupting
the disruptor.
Emerging battery chemistries
Within the broad Lithium-ion class, the
following specific battery chemistries are being developed around the specific
themes of anodes, cathodes, electrolytes and separators…
Specific chemistry |
Feature |
· Lithium Nickel
Manganese Cobalt Oxide. · Lithium Nickel Cobalt
Aluminium. |
Increasing energy density at an
affordable cost. |
· Lithium Iron Phosphate. · Lithium Titanate. |
Improving cycle life, but at the expense
of higher cost and lower energy density (noting that rapid charging of
conventional Lithium-ion batteries especially at high temperatures reduces
the cycle life). |
· Silicon anodes. |
Appears to be the key to improving energy
density. |
The following emerging battery chemistries
are also noted…
· Lithium Sulfur.
· Various forms of
Zinc-based batteries
· Redox flow batteries.
· Sodium ion
This article will be concluded in Pipes & Wires
#197.
Regulatory thinking and policy
UK – limiting cost over-runs on capital works
Introduction
Most of us understand that many
regulatory frameworks encourage the efficient delivery of capital works by only
allowing the efficient cost to be recovered through the regulated tariff. This
article examines a recent inclusion of a new clause in Heathrow Airport’s
license that will directly penalise Heathrow if the expansion costs exceed an approved
amount (as distinct from simply limiting their ability to recover the cost
over-run).
The Heathrow expansion and wider stakeholder concerns
Heathrow’s expansion plans focus on the addition of a third runway by about 2028, as the
current capacity constraint is encouraging airlines to fly to other European
airports. Estimated costs are in the order of £14b (after about £2.5b of scope
reductions).
Airport users concerns include
a lack of incentives for limiting costs, the ability to recover inefficient
costs, and an apparent unwillingness to consider alternative options.
The CAA’s new clause
Heathrow currently operates
under a license
from the CAA that
includes a price control component. That license was amended in December 2019
to include a clause that will penalize Heathrow if it fails to build the
expansion within the approved £14b.
The editor comments
From where I view the world
there is no shortage of apparent cost over-runs on infrastructure projects
ranging from trams to water to tunnels (although I suspect these aren’t so much
over-runs, but simply costs exceeding the published low end of the cost
estimates, but still within the estimated range). Anyway, pause for thought
that perhaps many regulatory bodies are searching for stronger tools to specifically
encourage efficient delivery of capital works.
US –
changing the regulatory models
Introduction
Most of us are familiar with the 2 dominant
regulatory models … cost-plus, and incentive (which seems to be morphing back
into cost-plus). This article quickly examines some regulatory history, and
then focuses on some regulatory models emerging in the US aimed at integrating
distributed energy resources (DER’s).
A quick
bit of regulatory history
A quick history of infrastructure
regulation includes…
· All
passenger train operators in England were required to run at least 1 train per
day offering a third-class fare of
no more than 1d per mile around 1844.
· Gas
distribution tariffs became regulated in England around the 1860’s.
· The
familiar cost-plus regulation of electric distribution tariffs emerged in the
US around the early 1900’s.
· Incentive
regulation emerged in England in the late 1980’s (but as noted above, has kind
of morphed back into cost-plus).
· Incentive
regulation re-emerged as RIIO in England around 2012.
The
emerging regulatory models
New regulatory models that seek what regulators
consider to be a better balance between electric company revenues on the one
hand, and customer demand for distributed energy resources (DER’s), lower
prices and better value on the other hand are emerging in the US states of
Illinois, Oregon and Hawaii. Key features of those emerging models include…
Illinois |
· Allowing
electric companies to recover the cost of the step-up to cloud computing that
is considered necessary to fully integrate DER’s into the grid. · Allowing
electric companies to have a sand box to allow reasonable recovery of the
costs of mucking about with new technologies (noting that other jurisdictions
are also considering this). |
Oregon |
· Stepping
back from pricing individual technologies to pricing overall value. · Allowing
price signals from specific services so that both customers and providers can
understand value. · Better
defining how specific technologies that provide capacity should be paid for. |
Hawaii |
· Recognising
the need to migrate away from very high prices and dependence on oil-fired
generation, but also recognising the need for fair cost recovery. · Introducing
energy efficiency standards (nothing remarkable about that). · Requiring
electric companies to competitively request new capacity and storage
investments. · Breaking
the traditional link between capital investments and cost recovery. |
Pipes & wires will continue to examine
new regulatory models as they emerge.
Industry structural changes
US –
Jacksonville rejects bids for electric and water business
Introduction
Pipes
& Wires #194 examined the City
of Jacksonville’s proposed controversial sale of its municipal
electric and water business. This article notes the City’s rejection of bids,
effectively terminating the sale process.
Recapping
the proposed sale process
Back
in August 2019 JEA sought
competitive bids from investors aligned to its strategic goals. The bidding
documents valued JEA at about $5.4b, but indicated that bids would need to be
in the range of $6.8b to $7.3b to even get consideration. In the end 16 bids
were received (including bids from NextEra Energy, Duke Energy, Macquarie and IFM Investors) from which 9 bids were chosen to
progress to the first round of negotiations.
Rejecting
the proposed sale
In the days before Christmas 2019 the City
asked the JEA board to end the negotiation process, which it did by unanimously
voting to reject all 9 bids even though all 9 of those bids appear to have met
the City’s minimum criteria. This rejection appears to have included the
resignations of several JEA executives.
The termination of the sale process has
included vague statements like “stakeholder trust has been lost”, so it appears
that city politics rather than commercial reasons have ended the sale process.
Network regulatory decisions
Aus – the Queensland electricity distribution revenue reset
Introduction
Energex and Ergon
Energy
recently submitted their Revised Regulatory Proposals (rate cases) to the Australian Energy Regulator (AER) for the 5 year regulatory control period commencing on 1st
July 2020. This article examines those Revised Proposals.
Regulatory framework
The regulatory
framework is based on the National Electricity (South Australia) Act 1996, which provides for the making of the National Electricity Rules (version 111 at the time of writing).
Electricity distribution determinations are principally made pursuant to Chapters 6 of the Rules.
Key features of the process to date
Key features of the Energex
process to date include…
Parameter |
Proposal |
Draft Determination |
Revised Proposal |
Final Determination |
CapEx |
$2,327m |
$1,793m |
$2,010m |
|
OpEx |
$1,806m |
$1,942m |
$1,938m |
|
Opening RAB |
$12,917m |
$12,887m |
$12,861m |
|
Nominal vanilla WACC |
5.46% |
4.87% |
4.67% |
|
Depreciation |
$804m |
$756m |
$822m |
|
Smoothed revenue |
$6,541m |
$5,840m |
$5,900m |
|
Key features of the Ergon process
to date include…
Parameter |
Proposal |
Draft Determination |
Revised Proposal |
Final Determination |
CapEx |
$2,905m |
$2,151m |
$3,007m |
|
OpEx |
$1,835m |
$1,973m |
$1,968m |
|
Opening RAB |
$11,634m |
$11,553m |
$11,513m |
|
Nominal WACC |
5.46% |
4.87% |
4.67% |
|
Depreciation |
$1,052m |
$997m |
$1,052m |
|
Smoothed revenue |
$6,516m |
$5,788m |
$5,997m |
|
Pipes & Wires will comment
further once the AER releases its Final Decisions.
UK –
setting the framework for RIIO – ED2
Introduction
Pipes
& Wires #173 and #179 set out
the framework that the UK energy regulator Ofgem would adopt for the second
RIIO price controls, whilst Pipes
& Wires #191 set some context
for the RIIO – GD2 gas price controls. This article examines Ofgem’s recently
released framework
decision for the RIIO – ED2 electricity
distribution price controls that will start on 1st April 2023.
Key
features of the decision
Key features of the decision include inter alia…
· The
stated objective of the RIIO – ED2 framework will be to ensure that DNO’s
deliver value for money services that both existing and future customers need.
· Adoption
of a default period of 5 years (a return from the 8 years adopted for RIIO –
ED1).
· Requiring
enhanced engagement to give customers a stronger voice.
· Adoption
of the output and incentive features that other sectors have adopted.
· Adoption
of the Network Asset Risk Metric as part of justifying and assessing proposed
investment preferences.
· Requiring
DNO’s to properly manage cyber risk, physical risk and workforce resilience.
· Supporting
the transition to a low carbon economy.
· Exploring
the use of indexing to reduce the risk of forecasting errors.
· Replacing
the fast-tracking process for excellent business plans with another mechanism.
· Calculating
the baseline ROE similar to other sectors.
Next
steps
Ofgem will continue more increasingly
company specific work throughout 2020, culminating in the submission of initial
business plans in Q2 of 2021 and final business plans in Q4 of 2021. Initial
(draft) decisions will emerge around Q2 of 2022, with final decisions expected
in Q4 of 2022.
Energy mix and grid security
Aus – the draft Liddell Task Force report
Introduction
Pipes
& Wires #192
examined the Federal and NSW Government’s joint task force into the planned
closure of Liddell. This article examines the task forces draft report.
Recapping the Liddell situation
Liddell is currently owned
by AGL and now has a recognised capacity of about 1,680 MW from 4 black coal
fired steam turbines. AGL originally planned to close Liddell in 2022, but has
since agreed to delay closure by 1 year to 2023. Concern
over declining security of supply in the NEM prompted the formation of a joint task force to examine the
possibility of keeping Liddell open beyond 2023.
The draft conclusion
The task forces’ draft report (which appears to have been leaked) is that Liddell’s life could
be extended by a further 3 years to 2026, at an apparent cost of $300m. Key
concerns raised by the draft report include…
· Liddell is likely to prove unreliable despite the proposed spend,
and hence should not be relied upon.
· Life extension of Liddell could curb gas expansion projects such
as Tallawarra
B.
· It is expected that this life extension would need to be taxpayer
funded, as AGL has previously indicated that it is unwilling to fund life
extension.
· That pumped storage, gas and batteries could feasibly replace
Liddell.
The editor comments
Any decision to extend the life
of coal-fired power station will be unpopular and politically difficult, and
the draft Liddell conclusions are no exception. There does however remain the
concern of blackouts expressed by the Energy Security Board which critics seem
to either ignore or dismiss.
Pipes & Wires will comment
further when the final report emerges.
Recent client projects
Recent
client projects include…
· Identifying best practices in
grid-scale and community-scale batteries for an Australian distributor.
· Identifying best practices in EV
charging on behalf of an Australian distributor.
· Recommending amendments to a security
of supply standard to better reflect demand density.
· Identifying best customer engagement
practices on behalf of an Australian distributor.
· Development of an asset management
journey aligned to ISO 55001.
· Identifying learnings from the RIIO –
ED1 reset on behalf of an Australian distributor.
· Developing a smart metering strategy.
· Advising on likely available electrical
contractors.
· Undertaking a customer survey to
identify customer preferences for off-peak EV recharging.
· Developing a strategy for complying
with the related party transaction provisions.
· Advising on the regulatory implications
of an aging timber transmission pole fleet.
· Compiling some introductory thoughts on
digital transformation and blockchain.
· Facilitating a series of client
workshops to better understand asset information criticality and in-service
failure risk.
· Assessing the strength of asset
management practices.
· Reviewing recent AER decisions to
understand the expectations around asset management practices and methods.
· Reviewing the AER’s recent treatment of
network transformation expenditure.
· Compiling overhead conductor and wooden
cross-arm fleet strategies.
· Identifying the issues around
customer-owned lines on private land.
· Developing a risk-based tree trimming
strategy.
· Developing an EV charging strategy.
· Analysing transmission charges as a
percentage of total electric bills.
· Compiling a strategy for improving the
resilience of a sub-transmission network.
· Developing a best-practice guideline
for smart metering.
General stuff
Guide to NZ electricity laws
I’ve
compiled a “wall chart” setting out the relationship between various past and
present electricity Acts, Regulations, Codes etc in
sort of a chronological progression. To request your free copy, pick here. It looks really cool printed in color
as an A2 or A1 size.
A bit of light-hearted humor
What
if price control had been around in the 1920’s and 1930’s ?
A collection of classic historical photo’s with humorous captions looks at some
of the salient features of price control. Pick here to download.
A potted history of electricity
transmission
I’ve
recently compiled a potted history of electricity transmission. Pick here to download.
Wanted – old electricity history books
Now
that I seem to have scrounged pretty much every book on the history of
electricity in New Zealand, I’m keen to obtain historical book, journals and pamphlets
from other countries. So if anyone has any unwanted documents, please email me.
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Disclaimer
These articles
are of a general nature and are not intended as specific legal, consulting or
investment advice, and are correct at the time of writing. In particular Pipes
& Wires may make forward looking or speculative statements, projections or
estimates of such matters as industry structural changes, merger outcomes or
regulatory determinations. These articles also summarise lengthy documents, and it is important that
readers refer to those documents in forming opinions or taking action.
Utility
Consultants Ltd accepts no liability for action or inaction based on the
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