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Limitations of wind power generation development in Polish Power System Robert Jankowski Krzysztof Madajewski Cezary Szwed EWEC 2010 Warsaw 21.04.2010. Wind generation in Poland Study analyzing system limitations of WG operation in Polish Power System Scope of study Assumptions Results - PowerPoint PPT Presentation
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Limitations of wind power generation development in Polish Power System
Robert Jankowski Krzysztof Madajewski
Cezary Szwed
EWEC 2010Warsaw 21.04.2010
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Scope of presentation
• Wind generation in Poland• Study analyzing system limitations of WG operation in
Polish Power System– Scope of study– Assumptions– Results
• Conclusions
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Wind generation in Poland• Installed power: around 800MW• Issued permissions for grid connection:
more than 12000MW (end of 2009)compared to 4000MW in the beginning of 2008
• EU directive 2009/28/WE and Energy policy in Poland by 2030 show strong need for wind generation development (according to Policy Poland needs: 3400MW of WG in 2015 and 6100MW in 2020)
• Tasks to do for Polish Operators: – enable fulfillment of obligations and – coordinate Polish Power System and Wind Generation development
• no guarantee to absorb all power from WG with issued permissions for grid connection before grid reinforcements
• not all connecting conditions will result in working WG
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Setting up a studyInfluence of wind generation on power system
performance and operationStudy started April 2008
Contractor:– Instytut Energetyki Oddział Gdańsk
Vendors:– PSE Operator SA (TSO)– ENERGA-Operator SA (DSO)– ENEA Operator Sp. z o.o. (DSO) }
operate in area where the most connection permissions are issued
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Scope of Study
Types of analyses:– Power flow – Short circuit – Dynamic – Economical
Study area
Analyzed area:– Whole EHV grid– Selected 110kV grid
Influence of WG in Germany
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AssumptionsFinding answers to the following questions:What amount of power of wind generation can operate in northern Poland without significant network investments?What is necessary to enable more WG connection?
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Assumptions model development
• Increased power demand • Grid development:
– EHV limited development in studied area (not associated with wind)
– 110 kVin accordance with development plan up to 2011
• Wind generation – collected data– Working ~450MW (now ~800MW)– With connection conditions ~8650MW (now ~12000MW)
including 2100 MW connected to MV network– Influence of wind generation from Germany
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Assumptions – approach • First approach – before data collection:
– Take into account WG with connection conditions– Look for possibilities to connect more WG
• Final approach – after data collection:– Take into account WG with connection conditions– Change WG in range 0-90% of nominal power– All WG treated equally
• Global approach N-1 analysis for the whole system– In EHV grid– In 110kV grid
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Wind generation - locations
8150 MWThe most attractive area for investors
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Results - EHV networkMaximum loadings recorded in n-1 analyses summer light load model with WG 0-90%
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Results - EHV network
Number of observedloadings 80-100%
Number of observed loadings > 100%
0
400
800
1200
1600
2000
90 80 70 60 50 40 30 20 10 90 80 70 60 50 40 30 20 10
summer peak load summer light load% GW
num
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summer peak load summer light load
% GW
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Prior to this level, WG is limited by other factors
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Results – 110 kV networkMaximum loadings recorded in n-1 analyses summer light load model with WG 0-90%
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ConclusionsIn present state of the system development:• Maximum acceptable WG results from:
– number and level of overloadings – operators ability to cope with it by reducing WG
• Maximum WG in northern and north-western part of Poland: 4200MW (~50%) resulting from EHV network limitations
• EHV network development is necessary to enable more WG connections and operation
• Parallel operation of EHV and 110kV – big mutual influence on required investments and acceptable level of WG
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ConclusionsIn present state of the system development: • Influence of system balancing needs on maximum WG
in light load demand• Preliminary dynamic results (not enough data for future WG
installations) show – no negative influence on transient stability and voltage recovery– around 1000MW can be lost after faults in EHV grid
(mainly connected to MV network)
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ConclusionsElimination of barriers limiting WG connection to PPS:• Grid development , first off all EHV grid
E.g., significant increase of maximum WG in system with new double circuit line north-south Dunowo-Żydowo-Piła-Plewiska:up to 5800MW (~70% of analyzed power)
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ConclusionsElimination of barriers limiting WG connection to KSE:• TSO and DSO update their development plans to enable connection
of more WG and fulfill requirements of EU – in progress– PSE Operator in 2009 updated system development plan up to 2025 – ENERGA-Operator, in the study, updated grid development plan up to 2018
• Improvement of balancing ability of the system – More units with wide range of active power operation – More units able to respond quickly to changing power balance – Less units in must-run mode
• Obligation to WG: to fulfill requirements of grid code (to avoid problems other power system experience now) and update connecting conditions issued before 2006
• Learn from experience of other countries
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Thank you for attention