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Day1 WORKSHOP O PSSE FOR - SEC Bhutan.pptx
- 1. SAARC Workshop on Load/Power Flow Studies using PSS/E for Efficient National & Cross Border Interconnected Power Systems in South Asia Agenda Thimphu, Bhutan 18th to 20th July 2018
- 2. Day-1 (18-July-2018) Workshop on Power flow studies using PSSE at Thimphu, Bhutan 2 Time Description 1115-1300 Session-I “Introduction to power system simulation using PSSE” Views in Power flow interface File types in PSSE Program settings PSSE Documentation Creating a new case Familiarization with data types / Adding and Modifying power flow data 1300-1400 Lunch 1400-1530 Session-II “Getting started in power flow with PSSE” Power flow solution Hands-on exercise in power flow 1530-1700 Session-III “Diagrams in PSSE” Diagram view and Diagram Toolbar Diagram options Creating diagram of a subsystem Hands-on exercise
- 3. Day-2 (19-July-2018) Workshop on Power flow studies using PSSE at Thimphu, Bhutan 3 Time Description 1000-1200 Session-I “Exploring power flow solution” Solution methods Solution parameters Viewing power flow results Limit checking reports Hands-on exercise: Examining power flow results 1200-1300 Session-II “Toolbars and Diagrams” Usage of common toolbars Program preferences 1300-1400 Lunch
- 4. Workshop on Power flow studies using PSSE at Thimphu, Bhutan 4 Day-2 (19-July-2018)…contd.. Time Description 1400-1600 Session-III “Introduction to Fault Analysis” Generator and Load conversion Setting up a sav case for fault analysis Balanced switching options ANSI and IEC fault analysis options Hands-on exercise on fault level calculation at network buses Charging studies 1600 - 1700 Session- IV “Data checking in PSSE” Using program features for bad data detection Handling a blown-up power flow case Hands-on exercise
- 5. Workshop on Power flow studies using PSSE at Thimphu, Bhutan 5 Day-3 (20-July-2018) Time Description 1000-1200 Session-I “Introduction to Dynamic simulation” Basic logic flow for dynamic simulation activities Setting up a *.dyr case for dynamic simulation Dynamics documentation Defining channels for simulation output Initializing a dynamics case 1200-1300 Session-II “Dynamic simulation activities” Applying disturbance Hands-on exercise on running a basic dynamic simulation 1300-1400 Lunch 1400-1530 Session-III “Contingency analysis” Creating data files for basic contingency analysis Transfer limits calculation in PSSE (Activity TLTG) Contingency ranking in PSSE
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- 7. SAARC Workshop on Load/Power Flow Studies using PSS/E for Efficient National & Cross Border Interconnected Power Systems in South Asia Session I : Introduction to power system simulation using PSS/E Day-1 Thimphu, Bhutan 18th to 20th July 2018
- 8. Electric Power system => Largest machine every built • Interaction amongst millions of devices and their controllers • Simulate => Assess impact without disturbance / interruption Power System Simulation 8 Generation Delivery Consumption
- 9. Simulation => Actual run of a model system to gain insight into its performance. Steps in Simulation => Modelling is the Transition of a given Physical problem into it’s Mathematical representation Introduction to Simulation…(1) 9 Simulation Programming Analysis Modelling Probability & Statistics (Assumptions)
- 10. 10 Power System study : Timelines and Categories • Steady State • Time ‘t’ is invariant => Frequency ‘f’ is invariant • Power flow studies • Short-circuit • Instant of switching (t=0+ ) • Transient Stability (Time-domain) • Time ‘t’ is variant • t = 0+ to tens of seconds • Small-signal stability (Frequency domain) • Eigenvalue analysis • Electro-magnetic transient analysis (Fast transients)
- 11. 11 Time Regimes in power system simulations
- 12. Per Unit (p.u.) System In p.u. system, power system quantities (such as V, I, R, X, VA, P and Q) are expressed as decimal fractions of chosen base values. p.u. values of circuit parameters are the same on either side a transformer. Choosing base value: • Can choose any value as the Base Value • Choose value to make computation efficient • In PSSE, usually choose: • MVAbase = 100.0 Zp.u. (new) = Z p.u. (old) x 2 (new) base (old) base ) V V ( x (old) base (new) base VA VA Change of Base:
- 13. Workshop on Power flow studies using PSSE at Thimphu, Bhutan 13 • PSSE Program overview Tool for Linear power system analysis Steady state power flow Short circuit studies Transient simulation (Linear differential equations) Ancillary programs: PSSPLT Vcurve analysis Transmission line parameter estimation tool (Lineprop) Functions like a sophisticated and powerful handheld calculator PSS/E Program overview…(1)
- 14. 14 Program Overview…(2) Source : PSSE 34.2 PAG-1 Workshop on Power flow studies using PSSE at Thimphu, Bhutan
- 15. Workshop on Power flow studies using PSSE at Thimphu, Bhutan 15 Program overview…(3) File Classes Created by Type Accessible to Formats Working files PSSE Binary PSSE - Data input files User via Text Editor Text PSSE and user *.raw, *.dyr Output listing files PSSE Text User - Channel output files PSSE Binary PSSE *.out, *.outx Response files User via Text Editor Text PSSE and user *.idv Saved case and Snapshot files PSSE Binary PSSE *.sav, *.snp Source : PSSE 34.2 PAG-1
- 16. Workshop on Power flow studies using PSSE at Thimphu, Bhutan 16 Program overview…(4)
- 17. Workshop on Power flow studies using PSSE at Thimphu, Bhutan 17 Program overview…(5) Spreadsheet View Output Bar / Tree View Command Line Status Bar Toolbar Diagram View
- 18. Workshop on Power flow studies using PSSE at Thimphu, Bhutan 18 Program overview…(6) PSSE Help Topics PSSE Topicwise Help : Press F1
- 19. Workshop on Power flow studies using PSSE at Thimphu, Bhutan 19 PSSE Startup • Run => Siemens PTI => PSSE 34.x => • Starts in EXAMPLE file directory (Default)
- 20. Workshop on Power flow studies using PSSE at Thimphu, Bhutan 20 Program Options…(1)
- 21. Workshop on Power flow studies using PSSE at Thimphu, Bhutan 21 Program Options…(2)
- 22. Workshop on Power flow studies using PSSE at Thimphu, Bhutan 22 Creating a new case • File => New =>
- 23. 23 Power Flow Modeling Data
- 24. Workshop on Power flow studies using PSSE at Thimphu, Bhutan 24 Network Data Tabs…Bus Data…(1) • Buses => Similar to Geographical Nodes in power system • Mandatory information : Bus number, Bus Name, ID (Type of Bus), Voltage Level (Base KV)
- 25. Workshop on Power flow studies using PSSE at Thimphu, Bhutan 25 Network Data Tabs…Bus Data…(2) • Bus Types: Bus Code Type ConstantP Constant Q Constant V Constant δ 1 Load Bus X X 2 GeneratorBus X X 3 Swing Bus X X 4 Isolated Bus
- 26. Workshop on Power flow studies using PSSE at Thimphu, Bhutan 26 Network Data Tabs…Load Data • Mandatory information : Bus number, ID, Pload & Qload (or other types) • Types : Constant P, Constant I, Constant Z • Scalable / Non-scalable, Interruptible / Non-interruptible
- 27. Workshop on Power flow studies using PSSE at Thimphu, Bhutan 27 Network Data Tabs…Machine Data • Mandatory information : MVAbase, Pmax, Pmin, Qmax, Qmin, Pgen, Vscheduled, Xsource, Xtran • All Machines attached to a Plant (viz. a collective of machines) • For multiple machines => Use IDs to identify units • Importance of individual parameters • Generator transformer modelling => Implicit / explicit
- 28. Workshop on Power flow studies using PSSE at Thimphu, Bhutan 28 Network Data Tabs…Plant Data Non-editable Editable
- 29. Workshop on Power flow studies using PSSE at Thimphu, Bhutan 29 Network Data Tabs…Shunt Data Switched Shunt Fixed Shunt
- 30. Workshop on Power flow studies using PSSE at Thimphu, Bhutan 30 Network Data Tabs…AC Lines • Mandatory information : From Bus, To Bus, Branch-ID, R, X, B (in p.u.), Ratings, Length, Line Shunts (From end / To end)
- 31. Workshop on Power flow studies using PSSE at Thimphu, Bhutan 31 Network Data Tabs…2-winding transformer • Mandatory information : From Bus, To Bus, R, X, Ratings, Tap Settings
- 32. Workshop on Power flow studies using PSSE at Thimphu, Bhutan 32 Network Data Tabs…Area/ Owner / Zone Areas Owners Zones
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- 34. SAARC Workshop on Load/Power Flow Studies using PSS/E for Efficient National & Cross Border Interconnected Power Systems in South Asia Session II : Getting started with power flow in PSS/E Day-1 Thimphu, Bhutan 18th to 20th July 2018
- 35. Workshop on Power flow studies using PSSE at Thimphu, Bhutan 35 Power flow solution options Robust method : Newton-Raphson
- 36. Workshop on Power flow studies using PSSE at Thimphu, Bhutan 36 Power flow solution
- 37. Workshop on Power flow studies using PSSE at Thimphu, Bhutan 37 Modifying power flow data…(1) • Power flow data modification options: • Change topology (Split buses, Join buses, Move network elements, etc.) • Scale Load / Generation (Bus wise / Subsystem wise) Topology Toolbar
- 38. Workshop on Power flow studies using PSSE at Thimphu, Bhutan 38 Modifying power flow data…Scale…(2)
- 39. Workshop on Power flow studies using PSSE at Thimphu, Bhutan 39 Modifying power flow data…Scale…(3) • Scale Load / Generation / Fixed Shunts • Scale Active / Reactive power components • Utility : • Change subsystem wise data
- 40. 40 Exercise : Power flow modelling…(1) Steam : MVAb= 58 MVA Pmax = 50 MW Pmin = 20 MW Pgen = 40 MW Qmax = 20 MVar Qmin = -10 Mvar Xsource = 13% Xtran = 14.5% Vsched = 220 Hydro: MVAb= 28 MVA Pmax = 23 MW Pmin = 0 MW Pgen = 20 MW Qmax = 10 MVar Qmin = 0 Mvar Xsource = 20% Xtran = 12% Vsched = 21.21 Active Power: 50 MW Power factor : 0.9 Active Power: 50 MW Reactive : 15 MVAR 220 kV 21 kV 33 kV System Base : 50 Hz, 100 MVA Swing bus (Type-3) : Bus3 FSC = ? X = 12% (System base) Rating = 40 MVA X = 12% (System base) Rating = 70 MVA Workshop on Power flow studies using PSSE at Thimphu, Bhutan
- 41. Workshop on Power flow studies using PSSE at Thimphu, Bhutan 41 Exercise : Power flow modelling…(2) Line Data Impedances (PU on System Base) R X B (MVA) Rate A Rate B Rate C Bus1 – Bus2 0.0003 0.0124 0.5435 132 200 220 Bus1 – Bus4 0.0002 0.0020 0.0068 132 200 220 Bus2 – Bus4 0.0001 0.0015 0.0049 132 200 220 Problem statement: • Model the standard 5 bus system above using data given • Use appropriate bus types (Refer previous slides on Bus-type) • Save as ‘Case-1.1.sav’ • Solve power flow • Find the highest loaded line (in percentage terms)
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- 43. SAARC Workshop on Load/Power Flow Studies using PSS/E for Efficient National & Cross Border Interconnected Power Systems in South Asia Session III : Diagrams in PSS/E Day-1 Thimphu, Bhutan 18th to 20th July 2018
- 44. Workshop on Power flow studies using PSSE at Thimphu, Bhutan 44 Tree Views in PSSE • Tree views in PSSE present useful information at a glance • To enable tree views for a particular category => View > Tick/Untick • Useful for creating diagrams, plotting transient simulation results, viewing model data, etc. Data Items In Tree view
- 45. Workshop on Power flow studies using PSSE at Thimphu, Bhutan 45 Diagram View in PSSE • For ease of visualisation • SLD (Single Line Diagram) form • Add/modify network elements • Perform power flow solution • View results
- 46. Workshop on Power flow studies using PSSE at Thimphu, Bhutan 46 Single Line Diagram View (*.sld file)
- 47. To Create a New Diagram
- 49. Diagram Properties...(1) • Menu Bar -> Diagram -> Properties • Diagram Annotation • Diagram Range Checking • Diagram Settings • Used to modify visualisation experience on SLD files
- 50. Diagram Properties...(2) Diagram Range Checking Additional Diagram settings
- 51. Diagram Preferences • Menu bar -> Edit -> Preferences • For ‘Grow’ activity • For control on bind/unbind mode
- 52. Diagram Preferences • Menu bar -> Edit -> Preferences • For ‘Grow’ activity • For control on bind/unbind mode
- 53. Exercise A. Open Case 1_1.sav- Solve the system using Full Newton-Raphson Solution Method (under Powerflow > Solutions) with Defaults Options. B. Create a one-line diagram of the Case 1_1.sav system. Refer to the attached one-line diagram to check your progress. C. Use auto-draw to add the system components. When you are finished, save the diagram information to a file called Case 1-1.SLD D. Automate power flows E. Check branch loadings as percentage of RATE-B F. Tap Branch between Bus-1 and Bus-2 (at Bus#606) with 40:60 ratio of impedances between Bus-1 to Bus-6 and Bus-6 to Bus-2. Add Load-SEC with P=5 MW, p.f. 0.9. G. Save Modified case as Case 1_2.sav H. Find Pair of buses with maximum angular difference
- 54. Workshop on Power flow studies using PSSE at Thimphu, Bhutan 54 Case 1_1.sld
- 55. Case 1_1.sld => Branch Overload Checking
- 56. Case 1_2tapped.sld => Network after tapping
- 57. Thank You !! 57 Workshop on Power flow studies using PSSE at Thimphu, Bhutan