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 ?