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What's New in PTW V5.0?
V5.0 contains lots of new features. It has been
sent automatically to all users with a valid update and maintenance agreement.
New Features: General PTW
- Project
Scenario Manager
- Multi-Scenario
Database Display and Editor
- Global Change
Capability
- Support for
multiple simultaneous users in a single project
- Expanded DXF
Export Options
- Export
Multiple Documents to DXF, WMF, Clipboard
- Form Print
Export to DXF, WMF, Clipboard
- Xref Utility
to update AutoCAD drawings with PTW schedules, one-lines and TCCs.
- Custom Arc
Flash Label
- Arc Flash
Line-side Report
- Arc Flash
Special Instantaneous Zone Protection (Differential, Zone Interlocking,
Optical Sensors, etc.)
- Group Print to
PDF
- Expanded
Protective Device Library
- Expanded
Switch Library
- Expanded
Transmission Line Library
- Link from TMS
Motor Plot to CAPTOR TCC
- New Motor
Damage Curves
- New Generator
Overload Curves
- Typical
Impedance Data for Motors and Transformers
- Copy/Paste
Text Blocks on one-lines
- Copy/Paste
Components between existing one-lines
- Global changes
for TCC display options
- Expanded Relay
modelling in I*SIM
- Expanded I*SIM
switching events and plot channels
- New Frequency
converter model in I*SIM.
- New option in
A_FAULT to follow IEEE 141 Table 4-2 Multipliers
- Meter
component for integration with on-line data and SCADA systems
- Expanded
DAPPER load flow module to include transformer LTC
- Optional DMS
Load Flow to compare meter data with system model
- Optional State
Estimation study module
- Optional
Optimal Power Flow study module
Project
Scenario Manager
The scenario
manager allows you to store multiple scenarios for each project. Changes made in
the base project may be automatically promoted to all of the scenarios. Study
results are stored with each scenario for comparison reporting.
The scenario
manager is accessed through the Project menu or the Scenario Manager button on
the Component Editor.
- Clone/Create a
new Scenario starting from the Base Project, or any of the existing Scenarios.
- Make any existing Scenario as the Base version and delete all other Scenarios.
- Delete the selected Scenario. Base Project can't be deleted.
- Rename the selected Scenario. Base Project can't be renamed.
- Promote base changes to the Scenario.
- Promote a Scenario to the base project.
Once you're in a
new Scenario, you can make any combination of changes including component state,
connections, input data changes, adding new components, deleting existing
components, etc.
Scenario
Manager Options:
- Add Scenarios
using the Clone button. The clone button will duplicate the selected scenario
and assign a default name.
- The Rename button allows you to enter a descriptive name for the scenario.
- The Delete button deletes the selected scenario. You can not use this function
to delete the Base Project.
- Promote to base allows you to replace the base project with one of the
scenarios. This option will delete all of the other existing scenarios.
Changes made in
the base project may be promoted to the scenarios with the following options:
- Promote changes only for fields that have not been modified in the scenario.
For example, if you modified the length of cable C1 in scenario1 and later
modified the length of cable C1 in the base project, the new length is stored in
the base project and updated in all scenarios except scenario1.
- Promote all changes made in the Base Project to all Scenarios. Any
component-level change made in the base project is automatically made in each
scenario.
- Do Not Promote Base Changes to Scenarios.
- The Component Editor with any Scenario activated (except the base) can help
identify components that have been changed or added in the Scenario.
- Show all components that have been modified (different than what's in the Base
Project) in the "Diff" set.
- Colour-coded the fields in the Component Editor that are different than what's
in the base.
- Show all components that have been newly created in the scenario.
Data Visualiser compares data from different versions
The Data
Visualiser is a 3-dimensional database viewer and editor. Any combination of
fields for any combination of components from any number of project scenarios
can be displayed and edited.
- Select any
number of scenarios to compare data
- Apply any datablock format to combinations of data fields from selected
scenarios.
- Run Queries to select components for display.
- Option to list data by Component or Attribute.
- Option to Replace or Append/Merge the newly selected/queried components.
- Jump to the next component/attribute or the next component type.
- Print the display or save to Excel.
- Modify project input data directly in the spreadsheet display.
- Modify data for multiple components in one single action by Global Change.
- Open multiple Data Visualiser windows for comparisons.
- Save the layout, selected components, selected scenarios, datablock format,
etc. as a Data Visualiser format. Recall any existing format.
Enhancements
to DXF, WMF, and Clipboard Export
- Single-layer one-line DXF conversion.
- Multi-layer one-line DXF conversion.
- Single-layer TCC DXF conversion.
- Export multiple One-lines, TCCs, Schedules, and Report files in a single
action.
- Export Form-Print Layouts
- Xref AutoCAD utility to dynamically update PTW Schedules, One-lines and TCC
drawings in AutoCAD.
Enhancements to Arc Flash Evaluation
- Added Arc Flash Current Limiting equation capability in Protective Device
library.
- Calculates Arc Flash incident energy and flash boundary based on the
user-defined current limiting equations when available.
- New Protective device Line-Side report. (Assumes working at the line side
protection and uses the next upstream device to trip).
- User definable colours for each PPE class for Bus Detail and Bus Label
reports.
- New "Descriptions" field in the Bus component to report Zone or Area in Arc
Flash labels.
- Enabled Go-To and Query Selections for Arc Flash, which can limit or select
buses shown in Arc Flash Table.
- Custom Arc Flash
Label format. To reach the custom label format editor, select the Bus Label
button on the Arc Flash Evaluation window.
Enhancements in CAPTOR - TCC
- New
segment named "Delay Band (I ^ Slope - T) with Current & Time Settings", defines
a line at a given slope and a given point defined by Current Setting at X
multiple of the LTPU, CT Ratio and Time Setting in seconds.
- New Generator Relay capability with Adjustable minimum pickup and min/max time
limits.
- Store TMS results for motor starting current with the motor component with new
option to plot it on CAPTOR-TCC.
- Replace the motor Stall Point with Rotor Damage Curve. (If only one point is
entered in the curve, it will plot as a single point similar to stall point)
- New motor Stator and Rotor Damage Curves.
- New generator Overload curve.
- Field Forcing Limit to start the generator decrement curve at a time other
than 100 seconds.
- Option to place the TCC generator damage point at a user defined per unit
current.
- Navigate from a selected protective device on the one-line/CE to the
appropriate TCC. Navigation uses the Window > Find in TCC menu function.
- Component "Existing" dialog support selecting multiple components to the TCC.
- Global change options for the current TCC or all TCCs in entire project to
turn on/off Device Label, SC Flag, Pickup Label, Cable Ampacity Flag,
Transformer FLA Label, Generator Rated Amps Label, and TCC Datablocks (with an
option to apply the datablock attributes from the selected curve to all curves).
- Updated TCC Crystal Report formats to include settings for all functions
defined for each protective device.
PTW Interface
Enhancements
- Support for multiple simultaneous users in a PTW project.
- Multiple selection dialog for adding "Existing" project components to a TCC or
One-line. Previously you could only select one component at a time.
- Option for transformer impedance to be based on Nominal kVA or Full Load kVA.
- Group Print multiple forms to a single PDF. Previously a separate file name
was required for each TCC. This feature requires the Acrobat Print driver from
Adobe.
- One-line display grid for symbol alignment. The grid display is selected from
the One-line>Grid menu.
- Function to copy text blocks and paste them to the same one-line.
- Option to export only the selected components from a one-line, or the
components currently listed in CE (could be a set from query, etc.)
- Added "Typical" data for transformer X/R in the "%Z Calculator". The typical
X/R values are based on rated size and can be found in graphical form in the
IEEE Red Book.
- Starting power factor separated from the fault contribution X/R for induction
and synchronous motors in order to run Load Flow study with the impact motor
staring option.
- Ability to Copy/Paste components from a one-line to another populated
one-line. Previously the target one-line had to be empty. Now you can paste to
any one-line where the copied components don't already exist. This is
particularly useful when merging multiple projects.
Enhancements
in A_FAULT
- New A_FAULT
study option to follow Std 141-1993 Table 4-2 multipliers for combined network.
The IEEE 141-1993
Combined network table contains a different set of motor multiplying factors
than those originally provided in the ANSI C37 standards.
Enhancements
in DAPPER Load Flow
- New load flow
option to include Transformer Load Tap Changer (LTC) representation. The
transformer taps will adjust automatically within the defined constraints to
hold the voltage at the specified control bus.
Enhancements
to DAPPER Panel / MCC Schedules
- New schedule report formats with load quantity included.
- New DXF Export capability and Xref AutoCAD utility to keep CAD drawings
current. Using Xref, the AutoCAD drawings store a reference to an existing
schedule. Each time the AutoCAD drawing is opened, the most recent schedule from
PTW is displayed.
I*SIM Enhancements
New Relay models in I*SIM, all models can sense voltage or current from anywhere
in the system, and trip any branches, loads or motors.
Relays include:
- Time Inverse Overcurrent
- Under Voltage Relay.
- Under Frequency Relay. (Trips individual loads, previously only tripped
percentage of static loads at the bus.)
- Power Rate of Change
- Frequency Rate of Change
- MHO Distance Relay.
- Impedance Distance Relay
I*SIM dynamic simulation expanded to use zero sequence network as well as
positive sequence network.
Expanded I*SIM
channel display to include:
- Branch P + j Q (From), P + j Q (To)
- Branch I1 (From), I2 (From), I0 (From), I1 (To), I2 (To), I0 (To)
- Branch IA (From), IB (From), IC (From), IA (To), IB (To), IC (To)
- Bus voltage V1, V2, V0, VA, VB, VC, and all voltage angles.
- Machine Mech. Torque, Elec. Torque, Ed", Eq", Ed', Eq'
New I*SIM
Switching Events (disturbance types)
- Apply 3Phase, SLG, LLG faults to a bus. Previously only allowed 3Phase fault.
- Apply 3Phase, SLG, LLG faults to a bus. Previously only allowed 3Phase fault.
- Apply 3Phase, SLG, LLG, LL faults to anywhere along a branch.
- Trip 1, 2, or 3 phases anywhere along a branch.
New I*SIM
Frequency Converter Model
- Two separate systems can be defined and connected through a Motor-Generator
Frequency Converter Model. The Frequency Converter allows you to specify the
operating frequency on the generator side of the converter. Disturbances may be
assigned and reflected in both systems.
Distribution
Management System (DMS)
New Meter
Component, reading meter measurement data from a SQL database. Some field
service customization is required for deployment of this feature.
Option to refresh
and display latest data from all meters on the one-line.
Load Profile
sub-view, store historical data for Loads and Motors.
DMS Load Flow compares meter measurement data with PTW Load Flow results using
existing load models, or Load Profile data.
Branch loss calculations from meter readings.
Branch impedance validation from meter readings.
Distribution
System State Estimation (balanced or unbalanced/single phase systems)
The State
Estimation program is a key component in the Distribution Management System
since measured data from meters may have errors, and it is impossible to use
meters to measure every power system state. The State Estimation program
estimates all the state variables by using measured data and pseudo-measured
data based on the users models.
The basic idea of state estimation is to "fine-tune" system state variables by
minimizing the sum of squares of the differences between the estimated and
measured power system data (real power P, reactive power Q, voltage V and
current I). The Weighted Least Square (WLS) approach is used to get the optimal
estimated load flow results.
Most State
Estimation is based on the balanced 3-Phase model. SKM's State Estimation
program is specifically designed to handle unbalanced 3-phase or single-phase
systems.
Both P, Q, V measurement set and I measurement set are used in our State
Estimation.
Pseudo-measurement data are used to improve the accuracy when no meters are
available at load buses.
Optimal Power
Flow (balanced or unbalanced/single phase systems)
The Optimal Power
Flow program obtains the load flow solution to minimize the selected objective
function while satisfying all constraints. The constraints could be balancing
the bus active and reactive power, satisfying lower and higher limits of bus
voltages and generator active and reactive power outputs, etc.
The Interior
point method (IPM) is used to get the optimal power flow solution.
Available objective functions are:
· Minimize Generation Cost
· Minimize System Active Power Loss
· Minimize System Reactive Power Loss
· Minimize Total Active Power Generation
· Minimize Total Reactive Power Generation
· Minimize New Shunt Mvar Devices Cost
Transformer taps,
generator P and Q could be adjusted to get the optimal power flow solution.
Most Optimal Power Flow programs are based on the balanced 3-Phase model. SKM's
Optimal Power Flow program is specifically designed to handle unbalanced 3-phase
or single-phase systems.
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