distributed power participation in the danish electricity market: regulation and dispatch issues...
DESCRIPTION
Участие распределенной энергетики в электроэнергетическом рынке Дании: вопросы регулирования и диспетчеризации. Докладчик: Андерс Стауге, Дания (Danish Energy Association, Заместитель Генерального директора). Семинар "Распределённая генерация: технические аспекты", 13 февраля 2013 г.TRANSCRIPT
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Distributed power participation in the Danish electricity
market: regulation and dispatch issues
Anders Stouge, Deputy Director General
Danish Energy Association
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Agenda
1. Danish Energy Association
2. The Danish Power System – a brief
3. Are we witnessing a change of paradigm
4. Centralized vs. Distributed electricity generation
5. Distributed generation and the liberalized power market
6. Subsidies for Distributed Energy in Denmark
7. Technical constraints for DG
8. Efficiency issues – central vs. decentral
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27-06-2012
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DNO (DSO)
Utilities – production-investors
Traders – electricity
Energy Service Providers
Optical Fiber
Intelligent Energy
EV Gas
Broad stakeholder Forums:
- Energy companies
- Tech companies
- Academia
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dato Forfatter, Titel 5
Electricity grid companies (69 companies and 99% of DSO network)
Electricity trading companies (27 companies and 90% of total retail)
Electricity production companies (14 companies and 60% of total generation)
Danish Electric Vehicle Alliance (56 companies – all major players)
Danish Intelligent Energy Association (135 companies - all major players)
Danish Energy Association is
a commercial and
professional organisation for
Danish energy companies.
Aims
The Danish Energy Association takes care of its member companies’
interests and thus works to improve conditions and competition among
these companies in order to ensure development, growth and well-being
in Denmark.
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Our offices in Copenhagen and in Brussels
Dansk Energi
Rosenørns Allé 9, 1970 Frederiksberg C,
T: +45 22 75 04 52
Denmark
Danish Energy Association
Rue de la Loi 227, B-1040 Bruxelles
T: +32 (0)491 25 30 23 F: +45 35 300 401
Lat/Lon:50.842027, 4.385166
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Øget produktion af VE
Øget anvendelse af el
Flere energibesparelser
Energy companies and business areas
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Agenda
1. Danish Energy Association
2. The Danish Power System – a brief
3. Are we witnessing a change of paradigm
4. Centralized vs. Distributed electricity generation
5. Distributed generation and the liberalized power market
6. Subsidies for Distributed Energy in Denmark
7. Efficiency issues – central vs. decentral
8. Technical constraints for DG
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About Denmarks current power system
Strong connections to
neighbouring countries
Part of Nord Pool market
Relatively small market
Denmark 36 TWh
Sweden 150 TWh
Norway 136 TWh
Germany 600 TWh
4000 MW wind power
installed (30 % of prod.)
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Transmission capacities in 2012, MW
1.750
950
710
600
600
1.500
600
700
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Electricity generation capacity – EU countries
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Kilde: ECF Roadmap 2050: a practical guide to a prosperous, low
carbon Europe. April, 2010
The revolution of the European energy system – long term
perspective
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The electrical grid in Denmark
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Goals for Danish Energy system
2020: 50% wind power in electricity consumption
2020: 40% reduction of GHG emissions vs. 1990
2030: Coal out of power plants
2035: 100% renewable energy in electricity and heating sector
2050: 100% renewable energy
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nn May 2010 EcoGrid EU 15
We need back up capacity with short back up time
Tomorrow 50% wind (2025) Today 20% wind (2008)
0
500
1000
1500
2000
2500
3000
3500
4000
4500
Wind power Demand
0
500
1000
1500
2000
2500
3000
3500
4000
4500 50% wind power
Wind power covers the entire demand for electricity
in 200 hours (West DK)
In the future wind power will exceed demand
in more than 1,000 hours
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Agenda
1. Danish Energy Association
2. The Danish Power System – a brief
3. Are we witnessing a change of paradigm
4. Centralized vs. Distributed electricity generation
5. Distributed generation and the liberalized power market
6. Subsidies for Distributed Energy in Denmark
7. Technical constraints for DG
8. Efficiency issues – central vs. decentral
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Traditional concept of power system
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New concept of power system
+ prosumers
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Definition
Distributed generation is considered as an electrical source connected to the
power system, in a point very close to/or at consumer´s site, which is small
enough compared with the centralized power plants.
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Denmark
Population: 5.5 mio.
BNP: 65500 mio. $
Energy production: 1137 PJ
Energi consumption: 864 PJ
Degree of self sufficiency: 130 %
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Point of departure: From a centralised to a decentralised RES based energy system
1980
Central power plant
Decentral power plant
Windturbine
Today
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Danish power infrastructure, 2009
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NUMBER OF CHP AND DH PLANTS IN DENMARK
Public-heat supply (cities):
• 16 centralised CHP
• 285 decentralised CHP
• 130 decentralised DH plants
Private heat supply (enterprises, institutions):
• 380 CHP
• 100 DH plants
In all:
• 665 CHP
• 230 DH plants
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From oil crisis to CHP and renewables (1970-2011)
Oil crisis in the 1970s lead to focus on
Energy savings
Renewable energy
Combined heat and power
Consequences
Decoupling on energy consumption and economic growth
Improved efficiency in consumption and production
Development of district heating
More decentralized energy system
Increase electricity trade beyond the borders
Increase in wind turbines
Decrease in emissions
Development of new technologies
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Energy Flow - Denmark Energy Flow - Denmark - 2011
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Electricity production by type of producer, Denmark
0
50
100
150
200
1990 '95 '00 '05 '11
PJ
Wind turbines and hydro Autoproducers
Small-scale CHP units Large-scale CHP units
Large-scale units, power only
Source: Danish Energy Agency
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Electricity capacity, Denmark
0
2000
4000
6000
8000
10000
12000
14000
1990 '95 '00 '05 '11
MW
Large-scale units Small-scale units Autoproducers Wind turbines
Source: Danish Energy Agency
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CHP share of thermal power and district heating production
0%
20%
40%
60%
80%
100%
1990 '95 '00 '05 '11
District heating Electricity
Source: Danish Energy Agency
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District heating production by type of production plant
0
20
40
60
80
100
120
140
160
1990 '95 '00 '05 '11
PJ
Large-scale CHP units Small-scale CHP units District heating units
Autoproducers, CHP Autoproducers, heat only
Source: Danish Energy Agency
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Distributed generation shares in total electricity production, EU-25
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Agenda
1. Danish Energy Association
2. The Danish Power System – a brief
3. Are we witnessing a change of paradigm
4. Centralized vs. Distributed electricity generation
5. Distributed generation and the liberalized power market
6. Subsidies for Distributed Energy in Denmark
7. Technical constraints for DG
8. Efficiency issues – central vs. decentral
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Why central power system?
The traditional central power systems is driven by:
Economies of scale
High energy efficiency
Alternative current – less transmission loss
Pooling of resources through transmission
networks
Environmental benefits
Regulation favoring larger generation facilities
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Drawbacks of centralized paradigm (I)
Decentralized power systems is driven by:
Transmission and distribution costs – 30% of
cost of delivered electricity and losses (line
losses, unaccounted for electricity, conversion
losses (changing voltage)).
Rural electrification
Investment costs to upgrade transmission and
distribution networks
Security and reliability (fuel diversity, back-up
capacity to prevent operational failures)
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Drawbacks of centralized paradigm (II)
Decentralized power systems driven is by:
Environmental impact (NOx, SO2, …)
Electricity deregulation and cost control device
(to hegde against negative price impacts or to
make a business based on price spikes on the
market investments are made in distributed
generation capacity)
Energy efficiency – combined heat and power
production to increase efficiency – steam and
heat are even less easily transported than
electricity, thus justifying distributed
generation through production next to the
point of consumption
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Agenda
1. Danish Energy Association
2. The Danish Power System – a brief
3. Are we witnessing a change of paradigm
4. Centralized vs. Distributed electricity generation
5. Distributed generation and the liberalized power market
6. Subsidies for Distributed Energy in Denmark
7. Technical constraints for DG
8. Efficiency issues – central vs. decentral
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The power market in Denmark
Trading takes place through different kinds of markets applying
different kinds of trade; you can read more about trade on the
pages: "Spot market", "Intraday" and "Reserve capacity and
regulating power". Below please find a figure showing how the
electricity market is structured.
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Liberalized power market Theoretical and in practice
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Power production capacity – Nordic countries
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Market volumes electricity markets
Source: Market prices and traded volumes obtained from Energinet.dk
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Agenda
1. Danish Energy Association
2. The Danish Power System – a brief
3. Are we witnessing a change of paradigm
4. Centralized vs. Distributed electricity generation
5. Distributed generation and the liberalized power market
6. Subsidies for Distributed Energy in Denmark
7. Technical constraints for DG
8. Efficiency issues – central vs. decentral
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Subsidy for DG in Denmark
Slides still under preparation
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Agenda
1. Danish Energy Association
2. The Danish Power System – a brief
3. Are we witnessing a change of paradigm
4. Centralized vs. Distributed electricity generation
5. Distributed generation and the liberalized power market
6. Subsidies for Distributed Energy in Denmark
7. Technical constraints for DG
8. Efficiency issues – central vs. decentral
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Technical constraints for DG (I)
Capacity: adding distributed generators at distribution level can
significantly impact the amount of power to be handled by the equipment
(cables, lines and transformers). May need reinforcement
The critical piece will often be transformers – if power generated exceeds
by far consumption, power will have to flow back from the low voltage
network to the medium voltage network or from the medium to the high
voltage network and be directed to other consumption areas.
Voltage: When power is carried over long distance, voltage tends to drop
due to resistance in cables. As generators connected to the distribution
network tend to increase the network voltage. This could benefit the
system. Adding another distributed generator might negatively impact the
network by increasing voltage above the specifications.
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Technical constraints for DG (II)
Voltage and current transients: short term abnormal voltage or current
oscillation may occur as distributed generators are switched on or off. The
result of these oscillations can have a destabilizing effect on the network.
Ancillary Services: As of today all the ancillary services positively impacting
the quality of electricity delivered are provided by centralized generators. For
example, centralized generators are requested to keep capacities in excess
of peak load to adjust production in case of demand surge, to hold voltage
control devices. As the share of distributed generation increases, distributed
generators will have to provide a larger share of these services??
The integration of distributed generation on a large scale will require the
distribution network to be active in the sense that they will have to manage
the flow coming from centralized generation through the transmission lines,
forecast the levels of output from distributed generators (and especially peak
generators), collect information, devise start-up procedures in case of system
failures, automation
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Vision - DSO will operate active networks – DSO will act as “local
and regional TSO”.
In the active networks vision, the principles of network management differ from
the classical view of networks
The ‘infinite network’ as customers used to know it, no longer exists!!!!!!.
The network interacts with its customers and is affected by whatever loads and
generators are doing
A dynamic pricing system and a market for ”using” the network at DSO-level will
evolve – DSO will set the framework, standards and rules for the market
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From passive to active network management at DSO-
level will be accompanied by developing new services
for the electricity market
With active management of distribution networks, the
amount of DG that can be connected to existing
distribution networks can be increased by a factor of
three to five without requiring network
reinforcement!!!!.
Source: Akkermans and Gordijn,
Business Models for Distributed Energy Resources in a Liberalized Market Environment,
summarising report of BUSMOD, Enersearch AB, Malmö, Sweden, 2004.
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Agenda
1. Danish Energy Association
2. The Danish Power System – a brief
3. Are we witnessing a change of paradigm
4. Centralized vs. Distributed electricity generation
5. Distributed generation and the liberalized power market
6. Subsidies for Distributed Energy in Denmark
7. Technical constraints for DG
8. Efficiency issues – central vs. decentral
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Efficiency issues – central vs. decentral
Slides still under preparation
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Extra
In case of questions related to other issues
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Electricity consumption by energy source
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Total Danish greenhouse gas emissions
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How will we reach 40% reduction of GHG emissions in 2020 vs. 1990
Wind Biomass and
closing of power plant units
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50% wind power in electricity consumption
How?
Calculations by Danish Energy Association
21,1%
5,4%
4,5%
11,1%
4,7%
3,2%
0,0%
10,0%
20,0%
30,0%
40,0%
50,0%
60,0%
Electricity from wind,2010
Adjustment, 2010 Offshore wind (400MW) - Anholt
Offshore wind (1000MW) - KriegersFlak+Horns Rev
Coastal Wind (500MW)
Onshore Wind (500MW net.)
Shar
e o
f w
ind
in e
lect
rici
ty c
on
sum
pti
on
, 202
0
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Doubling Energy Saving Obligations for energy companies
- Focus on buildings and industry
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4 groups of challenges and solutions following the EU Energy Roadmap 2050
1. Generation
2. Infrastructure
3. Energy Efficiency 4. Internal Energy Market
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Status for the 2020 targets before the adoption of the Energy Efficiency Directive
The EED will
achieve 15
% (+2 % on
agreed
transport
measures)
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Background Information for the European Council, 4 February 2011
What the EU renewable target means Will put pressure on thermal power plants!!!!
Share of renewable energy
in total energy mix (in %)
0%
10%
20%
30%
40%
50%
Be
lgiu
m
Bu
lga
ria
Cze
ch
Rep
ub
lic
Den
ma
rk
Ge
rma
ny
Esto
nia
Ire
lan
d
Gre
ece
Sp
ain
Fra
nce
Ita
ly
Cyp
rus
La
tvia
Lith
ua
nia
Lu
xe
mb
ou
rg
Hun
ga
ry
Ma
lta
Neth
erl
an
ds
Au
str
ia
Po
lan
d
Po
rtu
ga
l
Rom
an
ia
Slo
ve
nia
Slo
va
kia
Fin
lan
d
Sw
ed
en
Unite
d K
ing
do
m
EU
27
60%
EU 2020
EU 2005
2005 levels
Additional step to meet the 2020 target
Each Member State has a binding target - set as a combination of renewable
potential and GDP - to increase its share of renewable energy by 2020.
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Aging fleet of power plant in Europe
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6
0
Policy recommendations to facilitate modernisations and transition of the energy system
Align EU policy and incentives to investment life cycle in power generation
Life time of power plants: 25-50 years
900 TWH to be replaced before 2020
Investors need certainty on post 2020 setup now
ETS phase IV in line with 2050 objectives (80-95% GHG reduction)
2030 GHG targets for non ETS sectors
EU wide RES targets for 2030
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Proposal from the Commission
in 2013 on post 2020 policy
framework
- The political battlefield:
Economic crisis
and unemployment
No global agreement
climate agreement
in sight Internal market vs.
national regulation (GER, UK, PL, DK?)
Poland will veto all
post 2020 targets
and no MS but
Denmark favour a
new RES-target
Changes to the ETS
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The Future – power plants
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The future of the Danish Power Sector?
50% WIND
What about
The other 50% ?
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What’s in it for me?
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What’s in it for me?
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What’s in it for me?
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What’s in it for me?
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Continuous investment in new capacity in the Nordic region
Source: EIA.gov, 2012
0
10
20
30
40
50
60
70
80
90
100
GW
Nordic Countries Installed Electrical Capacity
Nuclear Conventional Thermal Hydro Wind Bio & waste
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Power surplus in the Nordic region
Source: THEMA CONSULTING GROUP, 2012
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Surplus leads to substantial price differences to the Continent
Source: THEMA CONSULTING GROUP, 2012
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How to secure the market value of power plants in Denmark: Focus on 3 or 4 types of Cash Flows ?
Electricity Heat
Ancillary services
(systemydelser) +
capacity payment?
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Important issues
Elspot
Heat
Ancillary
services
Flexible CHP plant
Earnings per MW
Reserves and other ancillary services
Great uncertainty about products and volumes going forward
Bilateral procurement in neighbouring areas without reciprocity reduce potential
market size and earnings
Roles and responsibilities of market players not clearly and unambiguously
defined
Heat
Current Danish regulation only allows for cost based price setting
Transformation from being secondary to electricity production to becoming a
primary product at certain times
Elspot
Subsidized wind expansion puts downward pressure on price level
CHP electricity production needs to take heat contracts into account
Regulated maximum price does not allow for pricing of real scarcity
Cash flow elements Issues that challenge the cash flow
General
Insufficient infrastructure due to constraints on existing cables and inertia in
build-out of new cables
Some products have been delivered implicitly as mandatory system services
instead of in a well-defined specific market
Markets closer to hour of operation lack liquidity
Cash flow elements
available to ensure
sufficient flexible capacity
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What will happen??
Minimum capacity to maintain
security of supply
MW
Time
Risk of
capacity gap
Purely market based capacity adjustment
with no changes to current market design
Current market design gives insufficient remuneration to flexible
capacity
If no intervention, a flexible capacity gap could arise (at least
locally) in the medium term