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Software Analysis Tools Felix Wu University of Hong Kong Northeast Asian Power Grid Interconnection Shenzhen , May 7, 2002.

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Presentation on theme: "Software Analysis Tools Felix Wu University of Hong Kong Northeast Asian Power Grid Interconnection Shenzhen , May 7, 2002."— Presentation transcript:

1 Software Analysis Tools Felix Wu University of Hong Kong Northeast Asian Power Grid Interconnection Shenzhen , May 7, 2002

2 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

3 Interactions of Software Tools Planning tools: Benefits - Economy - Environment Investments Risk Operation tools: Performance analysis -Stability Control system design Investment decisions Schematic update

4 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

5 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.

6 Production Costing Simulation Load (GW) Annual Load Curve (Week)

7 Production Costing Simulation Load (GW) Annual Load Curve

8 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

9 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

10 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

11 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

12 Commercial Software Packages  PROSYM  UPLAN  EGEAS

13 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

14 UPLAN  Developed by LCG Consulting  Advanced algorithms to simplify computations  PC based  Multi-area capability

15 EGEAS  Developed by Stone and Webster for EPRI (USA).  Advanced optimization techniques  Detailed production costing

16 Transmission Planning  Siting »Route selection »Capacity »Costing »Scenario generation  Performance analysis »Fixed configurations (snap shot) »Power flows, optimal power flows, stability

17 Data Requirements  Input data »Transmission network –Configuration –Parameters »Generation –configuration –Cost »Load  Output data »Power flow pattern »Constraint violations

18 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)

19 PSAPAC  Comprehensive modeling  Advanced algorithms  Accurate and reliable performance  Extensive data requirement  Elaborate output

20 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

21 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

22 Calibration of Tools Planning Operation UPLAN PROSYM PST PSAPAC More detailed modeling More data

23 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

24 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.

25 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.


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