founded in 1991, is a Philadelphia based corporation that specializes in
the design of advanced analysis systems for measuring performance of large electrical
power systems during fault and disturbance conditions. Softstuf is the home of the
Wavewin® software and the Sniffer data acquisition tools.
Thank you to everyone who attended the Wavewin Users Group Meeting.
It was great seeing everyone again. Please mark your calendar for
the 4th Annual Wavewin Users Group meeting scheduled for the second week in June 2011.
Maria Rothweiler Makki
Maria Rothweiler Makki
The chair began by thanking the group for attending the annual Wavewin training and
user group meeting and then introductions were made. The chair reviewed the agenda
and discussed possible dates for next years meeting. The group agreed to meet
during the second week of June.
The three day meeting proceeded as follows:
1st day, morning session: "Dynamic Relay Testing Fundamentals" seminar
presented by Tony Giuliante.
1st day, afternoon session: "Understanding CT Saturation & Transformer Inrush"
seminar presented by Tony Giuliante.
2nd day, morning session: “Digital Fault Records Fundamentals & Analysis”
seminar presented by Amir Makki.
2nd day, afternoon session: “Software Development Review & Planning Session”
meeting moderated by Maria Rothweiler Makki.
3rd day, morning session: “Transient Data Acquisition & the Sniffer” seminar
presented by George Semati.
3rd day, afternoon session: “Digital Fault Records Collection & Management”
seminar presented by Amir Makki and Mark Taylor.
The sessions were held in open format and were made available via Webx. The minutes of the
previous meeting were approved and the group was briefed on the research and development
activities during the past year. The primary focus was on:
Simplifying the device configuration, data access, and poll upon demand procedures.
Enhancing the data management procedures by adding features to save retrieved
fault records to multiple folders, to periodically archive and/or delete them,
and to allow for their management in a friendly way (dispatch table).
Adding specialized functions to the software channels to allow for plotting
frequency, RMS, power factor, and active and reactive power.
Developing support for the double ended algorithm from the Tony Giuliante seminar
presented at last years user group meeting.
Identifying the requirements needed to automate fault location calculations
based on user defined associations between available equipment and recorded data.
Identifying the basic parameters and relationships that are needed for developing
a highlevel/graphical interface for configuring the device manager.
Identifying the requirements needed to interface with energy management systems
(EMS) so that operators can pick options on their current systems and request
data from a specific device in the substation.
By the end of the meeting the group had composed a considerable list of requested revisions,
enhancements, and additions as noted in the following sections:
The following issues were addressed in the analysis session:
The latest COMTRADE revision was reviewed. It was determined that the date and
time of the first sample and trigger points must be specified as critical in
the standard. Amir was asked to suggest this correction when the standard is reaffirmed.
COMTRADE should also allow for a novel method to support additional fields for
specifying positive and zero sequence line impedance parameters and line length
without losing compatibility with the 1999 version.
Jack Soehren noted that searching by fault date gives only “dat” type files.
Amir cautioned that, when using COMTRADE single file format with Binary type, Version
2010, a text editor cannot be used because this version combines the data and
configuration files into one file.
Bill Royse noted that it would be nice to provide a summary that defines the
terms used in the Standards C37.111 and C37.232
The F2 short cut key is used to edit a highlighted text file. Another technique
is to double click on the file.
Because there are standard system voltages used in North America, Tony Giuliante
noted that the pre-fault system voltage can be used to determine whether the scale
of the file is true peak or RMS peak.
Jeff Pond cautioned that files with filtered data will not show DC offset.
Jack Soehren asked how to change the phasor positions: Using the + or – keys,
a user can change the position of a marked channel by moving it up or down.
The web attendees requested that a list of attendees be sent to them.
Jeff Pond commented that a standard Event Summary format should be created for
the control center system operators.
Amir was asked to run a test to determine the Wavewin file limit size in RAM and
to describe some of the factors related to using large files.
Ralph Schneider (CVPS) noted that SEL uses RMS calibrated values. It is desirable
that Wavewin automatically convert the file to true peak anytime an SEL file is read.
A problem was noted that when using Wavewin, the user may not have administrative
rights (read/write access) to change configuration parameters. An alternative will
Wavewin does not allow resizing of the columns in the data display table. Plans to allow
for such resizing will be made and implemented.
Bill Royse would like to use the ++ scale on particular channels, not all channels.
It is desirable to be able to individually adjust the times for merged Sequence of
Jeff Pond suggested that when frequency calculations are made with the calculator,
the number of cycles be displayed so they can be easily determined.
Fault location should be modified to show both percent of line and distance
(miles or kilometers) in both calculators (single and double).
Jeff Pond described a bug in Wavewin regarding the new Hathaway IDM recorders using
the replay plus with extension “dat”. The problem was corrected in the latest release.
Shi Jiang noted that a function to calculate CT saturation would be very helpful.
The following is a list of motions approved:
Import Excel data to device manager and hide unneeded driver fields via a preference
Add a new field as an additional parameter sent to relay to specify number of
cycles to retrieve (usually should be 30 cycles, default should be 15 cycles).
Also, should allow user to specify how many cycles to retrieve (this was a recent
SEL firmware change).
Allow the user to compose a library of his/her own set of custom drivers by
manually selecting and assigning multiple drivers to the same device (from the
configuration dialog). An example custom driver may include drivers to: dial, login
to switch, switch to port, login to relay, request a history list, poll for events,
read meter values, logout from the relay, return back to the switch, logout from
the switch, and then hang up.
Allow the user to access terminal mode information from the dispatcher table.
The double ended algorithm should be automated. The goal is to automatically select
the files, align them, arrange the channels, run the algorithm, and then create a
summary file. The results should be presented in a paper at the Fault Disturbance
For the double ended calculator, allow the user to set the V & I phase names in
the preference window.
For the double ended calculator, allow the user to print a summary of the fault
For the double ended calculator, it must have a provision to synchronize
the data (by rotation).
User Group reports and minutes should be sent to all attendees. This may help sign
up additional members for future user group meetings.
Write drivers to support a circuit breaker timing application.
Write drivers to monitor battery during trip application.
Bill Royse announced that he will be retiring this year and Jeff Pond was nominated
without objection and agreed to serve as the vice chair of the user group.
The group agreed to meet again next year with facilities for up to 30 attendees
with web access and audio equipment.
The planning session was concluded with a summary of the listed “near term”
additions, fixes, and enhancements.
The following revisions were requested during the sniffer session:
The group was cautioned that IP LAN addresses 0 & 1 are reserved and should not be used.
For the gain settings, provide the actual measurement ranges, i.e.:
1) Gain 1 is 0.5 to 50 Amps,
2) Gain 2 is 0.25 to 25 Amps, and so on.
The group agreed to take the gain information to an advanced window because,
typically, Gain 1 is used with all sensors unless there is a special application.
“Connect” should say “Upload” (actually none of the fields should be editable
until an actual connection is made).
Once a connection is made, the “Connect” button should be mute (or consider
renaming the “Connect” button to “Disconnect”).
“Downloading” should operate like “Saving to Disk”. (Provide a warning – “Are
you sure you want to overwrite?”).
Time code field should be auto filled (it should be read from the computer
or provided via a pop-up function).
Need a message that says: the “Unused” title means its channel data will not be saved.
Amir asked to add a mouse over function to define each button.
Sensor type and model number should be affixed on each sensor and should
match what is shown in the sensors list in the configuration program.
Also, next to each sensor name the range of values or rating should be added.
The DC cancellation column should be taken out (the program should automatically
decide when to apply it) and moved to an advanced window where interested users
can control it.
The “Offset” and “Scale” columns should also be moved to the advanced
window (no need to see them all of the time).
Re-label the “RMS” column to “Actual Value”, or “Measured Value”, or just “Value”.
The trigger “Duration” column should be specified in milliseconds, not in samples.
The trigger limits for the “Upper” and “Lower” columns should be set automatically,
they should also be moved to the advanced window for interested users. Actually,
the best thing is to just have two fields:
1) Trigger Above, and
2) Trigger Below.
Remove the “Primary" column (not needed, this application is always in secondary
Change “P/S ratio” label to “CT & PT ratios”.
Add a new column labeled “Display in” with a dropdown menu (kA, kV, etc.).
Amir Makki, Bill Royse, Jeff Pond, Tony Giuliante & Maria Rothweiler Makki
800-818-3463 (Toll free) firstname.lastname@example.org