21.05.2015. elering is managing estonian electricity and gas transmission systems with purpose to...
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21.05.2015
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• Elering is managing Estonian electricity and gas transmission systems with purpose to ensure high-quality energy supply to Estonian consumers at every moment.
• Starting from 02 January 2015 Elering AS (electricity TSO) is majority shareholder of Estonian gas TSO Elering Gaas AS
• Efforts towards full ownership underway
• Target to finalize merger of electricity and gas TSO-s by 2016
Elering AS
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Estonian Gas Market – Recent Developments
• Forecasted demand for 2015 (ca 500 mcm) ca 50% from year 2006 (1008 mcm).
• Over 60% of gas is consumed in Tallinn area
• Elering operates pipelines with MOP38 and MOP55 bar; non-odorized gas
• Interconnections with Russia (2) and Latvia (1)
• In 2014 nearly 100% of import was by Eesti Gaas - in 2015 share of gas import from Lithuania ca 24%
Key figures 2014
Network length885km
Transmission volume538 mcm
Regulation stations
(#)37
Metering stations
(#)2
Peak day4,5 mcm
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Gas Demand
442
645
745
816786
736 719
826865
724
838
962991 10081004
963
655701
627679 689
538511
0
200
400
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800
1000
1200
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
PROGNOOS
0
20
40
60
80
100
120
MCM
/ milj
onit
kuup
mee
trit
2012201320142015
Annual Monthly profiles
Further decline in demand is expected due to fuel swich in district heating
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Grid development
• Estonia-Finland interconnection (Balticconnector) - 2019
• Estonia – Latvia interconnection enhancement (bidirectional flow) – 2019
• Projects are intended to develop regional Baltic-Finnish gas market
• An integrated market with a larger market area and higher gas demand enables additional opportunities for new market-based supply sources (incl renewable gases)
• Considering the huge potential of renewable gas (biomethane etc.) in Finland and other Baltic countries the new interconnections have a considerable role in developing a renewable gas sector in the region.
The vision is to support development of a renewable gas hub in the Baltic-Nordic area to contribute to climate goals by enhancing gaseous renewable fuel uses
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Developing regional gas marketAfter acquisition of gas transmission network by Elering in the beginning of 2015 the Baltic gas market coordination group worked out short-term measures brought out below. Complete Baltic-Finnish gas market action plan will be composed beginning of 2016.
- Harmonization of gas Network & Storage Access Rules in the entire gas market of the region
- Accounting of cross-border gas flows offsetting the differences in energy value
- Harmonization of gas quality requirements - Harmonization of the gas supply licencing framework (retail and
wholesale) in the region - Roadmap for harmonized implementation of requirements of European
Network Codes in Baltic States and Finland; - Financing of EU Projects of Common Interest (PCI)- Harmonization of measurement of gas flows for technical and commercial
purposes in energy units (kWh at gross calorific value) - Launching a common virtual trading hub and a gas exchange in the region - Establishment of common gas Data Hub platform - Data exchange - Common approach to the definition of protected customers
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Gas networks in Estonia
• Gas distribution grids covering only limited area close to transmission pipelines (green circles)
• Most of territory is not covered by distribution networks
• Low demand – most of potential sites of production can’t be connected to distribution grids
• Network configuration does not meet needs of distributed production/consumption, especially CNG stations
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Gas Quality Standards
• Quality standard of gas injected into Estonian transmission grid (MOP38; MOP55)o http://gaas.elering.ee/kasulikku/vorgugaasi-kvaliteedinouded/
• Quality requirements harmonazed with Baltic TSO-so Follows EN 16726 (Draft when Baltic standard was adopted); o Common requirements for gas transported between Baltic gas
systems
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Corrosion – the main issue with renewable gases in transmission
grid
• The corrosion due to substances like H2S, O2, H2O, etc• Increasing oxygen content from 0.2 to 1% doubles the carbonic acid corrosion rate (@14
bar)• The hazardous corrosion rate sensitive to pressure
o Oxygen limits for low (<75 mbar) pressure not limited and for intermediate pressure (75 mbar to 2 bar) up to 17.25 % molo Oxygen limits for transmission over 0,2 % mol, generally considered as substantially increasing risk of damage o Pipeline inspection have revealed considerable corrosion damage due to H2S, O2, H2O, whereupon the oxygen content was limited to 2 vppm
• It is likely that a complex interaction between oxide, carbonate and sulphide corrosion products will occur that could either lead to localised attack (and consequently higher corrosion rates)
• Further research would be required to determine the effect of higher oxygen partial pressures which would be generated in gas transmission and distribution pipelines
Elering is planning a reserch project in cooperation with Tallinn University of Technology to introduce justified requirements for renewable gases content, taking into account the aim to promote development of renewable gases
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Conclusions
• Elering as TSO promotes diversification of supply sources of gas, especially local (regional) production of renewable gaseous fuels
• Transport sector could be a driver of increased demand and also local renewable gas production
• Connection of new renewable gas production and CNG stations to grid is limited due to poor geographical coverage of todays network – need to review the topology
• Content of hazardous substances in renewable gases imposes certain risk to gas pipelines - target to find balance between risks and costs
• Based on the huge potential of renewable gas (biomethane etc.) in Finland and other Baltic countries, vision is to support development of a renewable gas hub in the area to contribute to climate goals by enhancing gaseous renewable fuels use.
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Thank [email protected]