Post on 31-May-2020
transcript
Daniel Kuraspediani
BPA Technical Operations
PV TOOL / QV TOOLPW 19
POWER WORLD SLIDES
PV TOOL
Eliminates fictitious reactive reserve limitations
DO NOT WANT TO RAMP GEN = 100% loading
ECONOMIC DISPATCH
No reactive reserve leads to “cliff effect” PV simulation
ECONOMIC DISPATCH
Create Economic Dispatch for gen Add column options in Model Explr
Specify “economic range” 60 – 80% loading works well
ECONOMIC DISPATCH
Need accurate gen reactive capability curves Fictitiously optimistic results otherwise
GEN REACTIVE CAPABILITY CURVES
Full reactive capability at 100% loading
POWERFLOW SETTINGS
CONTINGENCY SETTINGS
Do not use this option
Set up post contingency assumptions Example: NO POST CTG REACTIVE SWITCHING
CONTINGENCY SETTINGS
Specify SOURCE and SINK injection groups
Ramps SOURCE and SINK until unsolved contingency or base case
PV TOOL– SETUP – SOURCE/SINK
PV TOOL – COMMON OPTIONS -
Set up Cont ingency Analys is Sett ings (post -cont ingency )
Set up Power F low Sett ings (pre-cont ingency )
Transfer Step s ize (how much to ramp) Stop within MW amount of unsolved soln Amount to reduce t ransfer s tep s ize by
Set up Cont ingency Analys is Sett ings (post -cont ingency )
PV TOOL – INJ. GROUP RAMP OPTIONS -
“Use Economic” if Economic Range is specif ied
PV TOOL – ADVANCED OPTIONS
Specify an interface to ramp instead of specif ic source/sink
Interface ramp constrained by user-defined OPF Options See PW HELP – “PV Curves setup: Interface Ramping Options”
PV TOOL – SETUP –INTERFACE RAMP
1. Ramp interface X and interface Y2. Maintain relationship of X to Y by angle 𝜽𝜽𝜽3. *Optional*: Maintain inter face Z flow by Zsetpoint
PV TOOL– SETUP –RAMPING INTERFACES
EXAMPLES:0𝜽 = Ramp X only45𝜽 = Ramp X & Y equally9𝟎𝟎𝜽 = Ramp Y only
Diagram from Power World HELP document
1. Ramp inter face X and inter face Y2. Maintain relat ionship of X to Y by angle 𝜽𝜽𝜽3. *O p tional* : Maintain inter face Z f low by Zsetpoint
PV TOOL– SETUP –RAMPING INTERFACES
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Select elements to track during run Ex: Buses, Interfaces Elements can be plotted at the end of the PV run
PV TOOL– QUANTITIES TO TRACK
Def ine monitored elements in L I M IT M O NITORING S E TTINGS
Track bus voltage violat ions
STOP PV run when bus voltage l imit is violated
END PV run when buses set to monitor dv/dq are negat ive.
PV TOOL – LIMIT VIOLATIONS
PV TOOL – RESULTS (PLOT)
1. Save PV run results2. Save Base Cases at dif ferent states during ramp
PV TOOL – SAVE RESULTS
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RUN QV AT PV LIMIT
QV TOOL
QV TOOL: SPECIFY WHAT TO PLOT
Enter Values for plotting
Choose Equipment to monitor *BUS Voltage *BUS DVDQ
SPECIFY EQUIP TO MONITOR
GENERAL OPTIONS / RUN
Power FlowSolution Options
Overrides Power FlowSolution Options
Sync Condenser: Aids in soln failures QV plotted from Fictious Sync Gen
OPTIONS – CTG’S
OPTIONS - OUTPUTS
Power World QV Slide [22]
QV - RESULT LISTS
Power World QV slide [23]
QV – RESULT PLOTTING
QV RESULT: (+) REACTIVE MARGIN
QV RESULT: (-) REACTIVE MARGIN
QV RESULT: LOW VOLTAGE SOLN STATE
LOW VOLTAGESOLUTION!!!!
PV – Find transfer l imit Ramp source and sink until transfers exceed supplied system
reactive power - Voltage Collapse Find Vstab IROLs – NOSE point Find SOLs – apply margin to NOSE Save case states during ramp Indicates voltage collapse, but doesn’t pinpoint exact collapse point
QV – Determine reactive margins Uses fictious reactive power injection at a single bus to determine
how much reactive power is available to support bus voltage schedule Determine where to place new reactive equipment Determine what bus a voltage collapse occurs
QV .VS. PV
Calculate pre- to post- contingency voltage deviation at monitored buses
Abil ity to define multiple SOURCE and SINK combinations Specify constraints for specific SOURCE/SINK pair
Revamp the Plot Designer Tool for scripting PV plots.
Add “nominal KV” column to PV Results\plot\Element Description
? FURTHER DEVELOPMENT ?