Presentation on theme: "Software Analysis Tools Felix Wu University of Hong Kong Northeast Asian Power Grid Interconnection Shenzhen ， May 7, 2002."— Presentation transcript:
Software Analysis Tools Felix Wu University of Hong Kong Northeast Asian Power Grid Interconnection Shenzhen ， May 7, 2002
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
Interactions of Software Tools Planning tools: Benefits - Economy - Environment Investments Risk Operation tools: Performance analysis -Stability Control system design Investment decisions Schematic update
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
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 system Energy, fuel, pollution, etc.
Production Costing Simulation Load (GW) Annual Load Curve (Week)
Production Costing Simulation Load (GW) Annual Load Curve
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
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
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
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
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
UPLAN Developed by LCG Consulting Advanced algorithms to simplify computations PC based Multi-area capability
EGEAS Developed by Stone and Webster for EPRI (USA). Advanced optimization techniques Detailed production costing
Data Requirements Input data »Transmission network –Configuration –Parameters »Generation –configuration –Cost »Load Output data »Power flow pattern »Constraint violations
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)
PSAPAC Comprehensive modeling Advanced algorithms Accurate and reliable performance Extensive data requirement Elaborate output
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
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
Calibration of Tools Planning Operation UPLAN PROSYM PST PSAPAC More detailed modeling More data
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
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.
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.