Software Analysis Tools
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Transcript of Software Analysis Tools
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Software Analysis Tools
Felix WuUniversity of Hong Kong
Northeast Asian Power Grid InterconnectionShenzhen , May 7, 2002
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Software Tools: Functions
Planning tools» Cost / benefit analysis of alternative plans» Financial risk assessment» Feasibility of plans: identify potential operating
disasters
Operating tools» Engineering design» Operational procedure
Data requirement Interactions of the tools
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Interactions of Software Tools
Planning tools:
•Benefits - Economy - Environment•Investments•Risk
Operation tools:
•Performance analysis -Stability•Control system design
Investmentdecisions
Schematicupdate
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Investment Decision Support
Investment costs» Fixed cost» Operating costs
Calculating capital costs» Assumptions» Accounting practice
Estimating operating costs» How the system operates
– Plant availability– Merit order loading (Unit commitment and economic dispatch)
» Production costing simulation
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Production Simulation
Load» Forecast load-A.
Generation» Existing generation A
» Export to B
» Merit order
Load» Forecast load-B
Generation» Existing generation B» Import from the
interconnection.» Merit order
Simulate power system operation To calculate production cost
From each generator and for the whole systemEnergy, fuel, pollution, etc.
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Production Costing Simulation
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ExpensiveThermal
Hydro
CheapThermal
Load (GW) Annual Load Curve
(Week)
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Production Costing Simulation
0
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ExpensiveThermal
CheapImport
Hydro
CheapThermal
Load (GW) Annual Load Curve
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Probabilistic Production Costing
Taking into account of uncertainties in generator scheduling, forced outages, hydro availability, etc.
Multi-year breaking down to a series of monthly or weekly simulations
Output provides information of » Fuel usage and cost» Pollution generated» Reliability level (Loss of load probability)» System marginal cost
Can be used to assess benefits (economical and environmental) of interconnection.
Data requirements
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Data
Input data» Load demand (peak load growth and load shape)
» Generator capacity, availability, fuel type, heat rate, start-up/ shutdown cost, pollution generation
» Fuel cost
Output data» System reliability
» System and individual generator operating cost (fuel, O&M), emission…..
Main tool in generation planning
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Multi-area Production Costing
Two approaches» Simultaneous simulation» External input
External input» Determine transfer capability between areas
– Rated and actual– Transmission planning tool
» Estimate transfer schedule» Model import as generator and export as load in
production costing– Deterministic or probabilistic modeling
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Generation Planning
Requirement for generation addition» Reliability (Loss of load probability)
What, where, when and how much to add» Scenario study» Optimization approach
Production costing
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Commercial Software Packages
PROSYM UPLAN EGEAS
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PROSYM
Developed by Henwood Energy Services. More than 80% of utilities in the North American
use it. Scenario modeling Stand-alone production costing or comprehensive
optimal generation planning. Detailed representation of performance, cost and
constraint characteristics of physical and financial resources
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UPLAN
Developed by LCG Consulting Advanced algorithms to simplify
computations PC based Multi-area capability
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EGEAS
Developed by Stone and Webster for EPRI (USA).
Advanced optimization techniques Detailed production costing
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Transmission Planning
Siting» Route selection» Capacity» Costing» Scenario generation
Performance analysis» Fixed configurations (snap shot)» Power flows, optimal power flows, stability
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Data Requirements
Input data» Transmission network
– Configuration– Parameters
» Generation – configuration– Cost
» Load
Output data» Power flow pattern» Constraint violations
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Software Packages
PSAPAC (EPRI, USA) DSA Power Tools (PowerTech Labs,
Canada) PSS/E (Power Technologies, Inc. USA) EuroStage (EDF) Netomac (Siemans) Power System Toolbox (Cherry Tree)
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PSAPAC
Comprehensive modeling Advanced algorithms Accurate and reliable performance Extensive data requirement Elaborate output
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Major Components of PSAPAC
INFLOW: Interactive power flow analysis ETMSP: Extended transient and mid-term
stability program SSSP: Small signal stability program VSTAB: Voltage stability analysis DYREN: Dynamic reduction program
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Power System Toolbox
Characteristics» A set of coordinated Matlab files
» Source code availability
Capability» Designed for small to medium sized system (800 nodes,
200 generators)
Functions» Load flow
» Transient stability
» Small signal stability
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Calibration of Tools
Planning
Operation
UPLAN
PROSYMPST
PSAPAC
More detailed modeling
More data
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Conclusion
For the Northeast Asian Power Interconnection Study, the following factors should be considered in the selection of software tools» Achievement of objectives» Minimum data requirement» Commonly used» Transparent» Ease of use
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Conclusion
For a preliminary study, we recommend that» For a particular analysis, a software is selected as the
defacto standard
» The interface between countries are specified according to the data requirement of that software
» Each member country can use the standard software or their own software for their part of the analysis
» The results are shared with the group
» Nautilus conducts an overall study and also provides assistance to each member country.
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Conclusion
We recommend that UPLAN and Matlab/PST be used initially for the preliminary study. More sophisticated tools may be used for future engineering analysis.