PowerWorld Simulator Users Group Meeting

1
PowerWorld SimulatorUsers Group Meeting

• June 23-24, 2005
• Hosted by ERCOT
• Austin, Texas

2
New Features in Simulator 11.0

• James Weber
• PowerWorld Corporation

3
Graphical User Interface ChangesUpdated the
Look and Feel

• Updated the look and feel of Simulator to match
  the latest Windows versions

4
Graphical User Interface ChangesFree-Floating
Windows

• New optional "free-floating windows" mode.

5
Graphical User Interface Changes

• Ability to use keyboard shortcuts to open oneline
  diagrams or AUX files at a single key stroke.
• More options for howlog messages are generated
  so that you may format color and whether
  names/kv, numbers, or both are used.

6
Oneline Diagram Enhancements

• Unlimited Drawing Undo Feature

7
Oneline Diagram EnhancementsHandles changes in
aspect ratio

• Support of multi-monitor displays so that your
  onelines can be spread across your screens
  without distortion

Resize Horizontally ? Diagram zooms Resize
Vertically ? Diagram crops
Version 10
Version 11
8
Oneline Diagram EnhancementsResize/Rotate
Objects

• Ability to resize and rotate oneline objects
  easily with your mouse.

Green Circle Rotation Point
Gray Square For looks only
Black Square Resize Handle
9
Oneline Diagram EnhancementsSelect-By-Criteria
with Filtering

• Added more abilities to the Select-by-Criteria
  dialog
• Each type of object may use an advanced filter
• Field list is now based on the columns available
  with the case information displays
• A list of commonly used fields is shown by
  default
• You may now save the list of Criteria Sets so
  that they may be reused later
• Criteria Sets are also used in conjunction with
  Emphasis and Display Detail

10
Oneline Diagram EnhancementsSelect-By-Criteria
with Filtering
Advanced Filters
Field list is based on the case info columns
11
Oneline Diagram EnhancementsEmphasis

• Added ability to Emphasize parts of a oneline
  diagram
• Uses the Criteria Sets to specify what to
  emphasize
• Uses alpha-blending to merge two images together
• The following set of slides demonstrates what
  this looks like.

12
Oneline Diagram EnhancementsWeather Radar
A Weather Precipitation Radar Image on a Oneline
13
Oneline Diagram EnhancementsTransmission
Emphasized
A Weather Precipitation Radar Image on a
Oneline Transmission System Emphasized
14
Oneline Diagram EnhancementsWeather Radar
A Weather Precipitation Radar Image on a Oneline
15
Oneline Diagram EnhancementsWeather Emphasized
A Weather Precipitation Radar Image on a
Oneline Weather Radar Emphasized
16
Oneline Diagram Enhancements Dynamic Formatting

• Dynamic Formatting
• Allows for Conditional Dynamic Formatting of
  Onelines and Case Information Displays
• Builds on existing features Select-by-Criteria
  AND Advanced Filtering
• Choose Options, Dynamic Formatting, then pick
  which of the two levels of formatting you want
• With the Case Case Info / All Views and Onelines
• Can apply to case information displays, bus
  views, sub views, and ALL onelines
• With Individual Oneline Active Oneline
• Will apply to only a single oneline

17
Dynamic Formatting Dialog Case Info / All Views
And Onelines
Choose an Advanced Filter
Choose Object Type
Choose the screen objects (or case information)
this should apply to
Temporarily make the formatting inactive
Choose Fields to apply to for some kinds of
objects
You can also FORCE an object to be visible
Choose Format Attributes
Only some attributes apply to case information
displays
18
Example Formatting of Lines Loaded above 50 in
Pink
Lines above 50 loading are thick and pink
19
Oneline Diagram EnhancementsPie-charts for
out-of-service lines

• Added ability to use special pie charts to
  highlight out-of-service transmission lines.

20
Oneline Diagram EnhancementsMore format options

• Enhanced the formatting of multiple selected
  objects so that you can change the field,
  rotation angle, and other object characteristics.

21
Oneline Diagram EnhancementsDefault Draw Values
for More

• Enhanced the default drawing values so that
  areas, zones, super areas and substations have
  their own settings.
• This includes the ability to specify the default
  fields which should appear around the objects as
  they are drawn also.

22
Oneline Diagram EnhancementsApply Default Draw
to Selection

• Default Draw Values normally only apply to future
  additions to the oneline
• You may now modify Default Draw Values, select
  some objects, then right-click on the selection
  choose Apply Default Draw Values

23
Oneline Diagram Enhancements

• Added Translucent Image Support
• Added ability to specify whether a branch is
  normally open. You may then color circuit
  breakers differently based on whether they are
  normally open or not.
• Added the ability to specify oneline options and
  contour information with a saved view.
• Added the ability to create contour color maps
  which map by value directly instead of going
  through the percentage mapping between Maximum
  and Minimum values first.
• This is a new option under the Option to specify
  whether to "Show Field Suffixes". If you uncheck
  this option, then the units which appear on most
  fields will be removed. Using this in
  conjunction with the "Include Field Labels"
  option is encouraged.

24
Time Step Simulation A New Tool Simulation Over
Time

• Input Data Changes over Time
• Load changes
• Generation changes
• Line Status changes
• Any value which varies over time
• Specify what values to Track over Time
• These values will then be stored for each time
  point
• You may then plot/review information available
  from the time-series
• Will be discussed more in later presentations

25
Support for GISGeographic Information Systems

• Added to the PowerWorld Library of Borders to
  include Borders for the entire World.
• More use of screen layers by default
• Borders are added to a screen layer called
  Borders by default.
• Added a new map projection for use with borders
  outside of North America (Mercator projection).

26
Built-In Geographic Borders
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Built-In Geographic BordersWith US Counties
28
Built-In Geographic BordersEntire World
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Support for GISGeographic Information Systems

• More will be discussed in a later presentation
• Support for reading GIS ESRI Shapefiles.
• Added ability to split and merge background
  lines.
• Added ability to convert a background line into a
  transmission line, substation, or bus for use
  with GIS data you may read.
• Added specification of a latitude/longitude
  coordinate with Bus and Substation objects.

30
New Dialogs and DisplaysBranches that Create
Islands

• Added a tool to generate a list of branches which
  if taken out-of-service will split your system
  into islands.
• Choose which branches to consider
• All
• Area/Zone/Owner Filters
• Selected
• Advanced Filter
• Tool will also give you a list of buses that are
  islanded by this action.

31
New Dialogs and DisplaysBranches that Create
Islands
Choose which lines to consider
List of branches that create islands will be shown
For selected branch, a list of buses that are
islanded will be shown.
32
New Dialogs and DisplaysArea-to-Area Tie-Lines
(also Zone)

• List of all area-area tie-lines
• Also a list of all zone-zone tie-lines

33
New Dialogs and Displays

• Modified the Injection Group and Interface Case
  Information displays so you could more easily see
  what the elements of the aggregations are.
• Greatly enhanced the auto-insert injection groups
  method so that they may generated by Area, Zone,
  Super Area, Owners, or a selection.
• Added right-mouse button local menu option on the
  interfaces case information displays for
  automatically creating reverse-direction
  interfaces from the selected interfaces.

34
Power Flow ModificationsMin per unit for
constant power

• Added ability to specify the minimum per unit
  voltage for which constant power loads are
  allowed.
• When a bus voltage drops below this threshold the
  load will gradually decrease to zero at 0 per
  unit voltage (uses a cosine function)

MW
SMW
Vpu
Vminpu
35
Power Flow ModificationsAngle smoothing for a
series of lines

• Enhanced the angle-smoothing routine so that it
  works on any series of transmission lines which
  are closed in together.
• Previously it would only operate when closing
  in a single line.

36
Power Flow Modifications

• Added the ability to treat continuous shunts as
  PV buses.
• Nomograms can now be defined that exist in all
  four quadrants.
• Added log messages notifying the user when the
  impedance of a branch was changed due to the
  impedance correction tables.

37
Contingency Analysis ChangesCombined Tables

• Added more options for summarizing contingency
  results
• Combined Tables Contingency Violation Matrices
• Combined Tables Contingency Violation List

38
Contingency Analysis ChangesContingency
Violation Matrices

• Contingencies as Rows, Branches as Columns

39
Contingency Analysis ChangesContingency
Violation Matrices

• Branches as Rows, Contingencies as Columns

40
Contingency Analysis ChangesNew Contingency
Actions

• New Contingency Actions
• 3-winding transformers
• Phase-Shifter
• Injection Groups merit order dispatch
• Set Generator or Switched Shunt voltage setpoints
• Set DC Lines amp/power setpoints

41
Contingency Analysis Changes

• Specify whether and how a generators MW output
  responds in the post-contingency solution.
• Modified the use of Model Criteria used in
  conjunction with contingency blocks. Simulator
  will now perform an AND if a model criteria is
  specified at bother contingency block level and
  the individual actions inside the block.
• Modified the Combined Tables in Contingency
  analysis so that it also included columns for
  Contingency Owner, Area, and Zone when they are
  shown in the Contingency Violation and
  Contingency Definition Tables.
• Added a new SUBDATA section "CTGElementAppend" to
  the objecttypes Contingency, CTGElementBlock,
  GlobalContingencyActions, and PostPowerFlowActions
  . Actions inside these sections will be appended
  to a definition instead of replacing the actions
  presently specified.

42
PVQV Modifications

• Completely updated the monitoring used in the QV
  Curve Tool to allow monitoring throughout the
  entire system instead of only the terminal bus.
  This monitoring is the same as the PV tool now.
• Added QV-specific solution options.
• Modified the PV Curve tool to optionally use
  merit-order based ramping of the generation or
  load in an injection group.
• Added ability to track more quantities in the PV
  and QV tools.

43
OPF and SCOPF Enhancements

• Greatly enhanced the speed of the linear program
  solution on large power system cases.
• Added the ability to dispatch two-terminal DC
  transmission lines in the OPF and SCOPF
  algorithms.
• Great improvement of the handling of
  phase-shifting transformers inside the DC optimal
  power flow. A better coordination of the
  phase-shifters can improve or help insure
  convergence.
• Great improvement of the dispatch of Area-To-Area
  MW Transaction Controls to better handle
  situations where they conflict with one another.

44
New Data and Features

• Ability to specify that a specific AUX file be
  read at the end of reading any power system case.
  This can be used to store default options you'd
  like applied to all cases.
• Increased the number of custom floating point
  numbers and strings from 3 to 5. Made the custom
  floating point numbers double precision.
• Modified the Line Impedance Calculator to use the
  long-line model.
• Added ability to retain unlinked injection group
  elements and interface elements when reading them
  from an AUX file so that you may better determine
  what has changed in your case.

45
New Data and Features

• Added storage of the Case Summary Information and
  the case description to the Auxiliary File
  format.
• Added ability to scale by owner.
• Add the ability to specify Bus Group Calculated
  Fields.
• Areas, Substations, and Zones can now be left as
  empty. This allows you to create them first as
  empty and then assign their contents.
• Added a memo tab to most of the object dialogs in
  Simulator. These memos can be used throughout to
  document your case in greater detail.

46
File Format Support

• GE EPC Files
• All Extra Data from the GE EPC file is now
  stored inside of the PWB format so that it will
  be written back out when an EPC file is saved.
• PTI RAW Files
• PowerWorld Simulator tries to figure out what
  version a RAW file is for your
• This can be messed up by various additions that
  some programs (usually EMS systems) add to the
  file format
• You can now tell Simulator explicitly which
  version the file is and open that directly

47
File Format Support

• EPC, RAW, and older PowerWorld Simulator Formats
• Simulator has no limitation on the number of
  characters for any names (buses, areas, zones,
  etc)
• When writing out bus names to formats that do not
  support longer names, Simulator will create a
  shorter name (but will make sure unique names
  remain unique)
• Eight Character Limit Example
• PowerWorldCorp11 becomes PowerW1
• PowerWorldCorp10 becomes PowerW2
• Twelve Character Limit Example
• PowerWorldCorp11 becomes PowerWorld1
• PowerWorldCorp10 becomes PowerWorld2