What's New in ASPEN OneLiner V15

 

The following are the new features in Version 15, the latest major version release of the ASPEN OneLiner program.

NOTE: clicking on the hyperlinks below will open a demo video in a new browser page 

  1. Enhanced overcurrent relay model:
    • Support for multi-level Definite Time overcurrent element

OneLiner V15 will correctly convert the instantaneous setting (in primary amperes) and delays in existing relays when reading OneLiner files from the previous program versions.

    • Support for directional element reverse flag and corresponding pickup settings of the directional element:

      The directional element was assumed to always look in the forward direction in OneLiner V14 and earlier.
  2. User-defined data fields: Users can define additional data fields to save custom data for all network and relay objects. These data fields can be used for many purposes, such as workflow management, auditing, external database connections, and others. The following pictures show some custom fields are defined in the File | Preferences | User-defined Data Fields dialog box and the Custom data field Owner of a line object is displayed in the data dialog box:

    Users can also modify all object UDF fields in the Data browser Edit mode.

  3. New converter-interfaced resource model for solar and type-4 wind plants and battery storage based the findings of IEEE PSRC C24 Working Group. This model is capable of injecting negative-sequence reactive current per the latest German grid code.

    Click on THIS LINK to watch a 45-minute webinar where Sherman Chan introduced the new type-3 wind plant model and the converter-interfaced resource model in OneLiner v15 and talked about how you can migrate the existing models in version 14 to the newer and better models in the new version.
  4. New Type-3 (doubly-fed induction machine) wind plant model using findings from IEEE PSRC C24 Working Group. You can turn on the “crowbar” state by marking a checkbox in the wind plant model’s dialog box.

    Click on THIS LINK to watch a 45-minute webinar where Sherman Chan introduced the new type-3 wind plant model and the converter-interfaced resource model in OneLiner v15 and talked about how you can migrate the existing models in version 14 to the newer and better models in the new version.
  5. Enhancements in the Check Relay Coordination using Stepped-Event command:
    • Checking stubbed lines: A stub line is defined as a line with a relay group at only one end.
    • Relay coordination checking of two-terminal lines and stub lines now includes checking of faults on the remote end of tapped transformers: A tapped transformer is a transformer that is connected to a tap bus on the study line and has no relays on either end.  The checking algorithm makes sure that no relay in the network will trip on 3-phase or single-line-to-ground faults on the remote end of each tapped transformer.
    • Ability to simulate pilot outage in the relay-coordination checking of 2- and 3-terminal lines in N and N-1 scenarios.
  6. Ability to simulate logic scheme operation with outage of pilot comm channels: when a logic scheme equation includes one or more signals from other buses, users will be able to run simulation of the logic schemes in local and remote relay groups with the communication channel on- or off-line as desired.
  7. Longer limit in object name and ID fields:
    • Lengthened bus name field to 16 characters from the 12 character length in version 14 and earlier. The first 12 characters have to be unique among all the buses.
    • Lengthened bus location field to 24 characters from the 8-character length in version 14 and earlier.
    • Lengthened branch name fields of lines, transformers, switches, series capacitors, and phase shifters from12 to16 characters.
    • Lengthen name field of relays, logic schemes, circuit breakers from 20 to 24 characters.
  8. Graphical User Interface enhancements:
    • Option for a non-white background for the program main 1-line window as well as the overcurrent and distance relay window.
    • Ability to adjust the size of relay groups on the time-distance diagram.
    • Ability to select a bigger size for toolbar buttons.
    • Show as a grayed-out symbol when not all relays in a relay group are online.
    • Show as a grayed-out symbol when not all units in a generator are online.
  9. Data browser edit mode: In the Edit mode, users can modify network and relay model data directly in the data browser grid cells and commit the changes to the network file. The edit mode also supports the pasting of cell data that you had copied to the Windows clipboard from a spreadsheet program. This will allow users to use a spreadsheet program to perform the desired update in the data then apply the changes quickly to the OneLiner network by executing the Copy/Paste commands.
  10. Improved phase shifter model: The new model is capable of modeling the shunt conductances and susceptances on both sides, in all three sequences.
  11. New facility for network model management: This new built-in facility is designed to serve as the foundation for OneLiner users in teams of all sizes to implement manual workflow and automatic system to manage their network model and relay data in OneLiner effectively and easily. It includes following program feature and commands:
    • A new built-in case comparison engine designed to detect differences between OneLiner networks at data field level. The engine also supports 3-way comparison, which takes into account the common base of the two files being compared. This comparison method will correctly identify all changed data fields in each file and will accurately report all conflicts when the same data field is changed in both files.
    • New Global Unique Identifier (GUID) in all network and relay data objects as well as in OneLiner The GUID will allow accurate tracking of the cases and data object for network model management applications.
    • A new text data file format OLX designed for storing network and relay data as well as all the configuration and simulation options in OneLiner The OLX format is XML-based and is compatible with the CIM standards.
    • A new change file format ADX designed for storing the difference data produced by the comparison engine. The ADX format is XML-based and is compatible with the CIM standards.
    • The new Compare and Merge File commands: User can run this command to compare one OneLiner file to another, view the differences in the network and relay data, and select to merge desired changes.
    • The new Case Builder command: Build new OneLiner network by applying a set of ADX files to a base case;
    • New Scripting engine API to execute the comparison and merge from a PowerScript program or an OlxAPI application.
  12. Two new 3-phase transformer models: Zigzag-zigzag-wye, with the wye leading and lagging the zig zag windings. Also instructions are given on how to create Zigzag-wye-delta transformers using the 2-winding Zigzag-wye transformer model.
  13. New in/out service date attribute for relays of all types.
  14. OneLiner Application Programming Interface module (OlxAPI) that can be called from Python and other programming languages. Users can use these API in building custom applications to process OneLiner network and relay models data and to run custom fault simulations and relay coordination studies. Click on the links below to see a demo of some real-world OlxAPI-based applications:
  15. OlxAPI Python Apps Library: This collection includes sample Python programs that show how to carry out various operations on OneLiner network data and run calculations. The library also includes several useful tools that users can use directly in their studies.
  16. New OlxAPI Apps Dashboard: The dashboard lets users find and execute OlxAPI Python applications on the PC. Applications that are launched from the dashboard will have access to the OneLiner network currently open in the program.
  17. Require “Start from linear network solution” or “Start from power flow solution” prefault voltage option for the following models to work in v15: voltage-controlled current source (VCCS), converter-interfaced resource, and type-3 wind plants. We briefly allowed VCCS to work under the “Assumed flat” prefault voltage profile in v14.8, but we discovered that was a bad idea.
  18. New CT polarity flag in DS relay model: user can use this flag when a distance relay is connected to a CT with reversed polarity to protect the network located behind the relay group. In OneLiner v14 and earlier, this type of distance relay application must be simulated using a negative value of the CT ratio.
  19. The “Ignore Instantaneous” option is stored in the OLR file, instead of on the local computer registry as in the previous versions: This will guarantee that the program will generate the same simulation results from the OneLiner file in any program installation.
  20. New Network Options (File | Preferences | Network)
    • Require a unique non-zero bus number for all buses: You can set this option to make sure all new buses that are added to the OneLiner network will have a non-zero bus number value.
    • Do not save journal data: When this option is set, OneLiner will not record the record creation date stamp and user ID details in the data file journal.
  21. Built-in client for the new OneLiner Enterprise Module (EDX): Users having the ASPEN Enterprise module will be able to execute Check-out, Check-in and Get Latest operations directly using their copy of OneLiner V15. Click on THIS LINK for more details about the ASPEN Enterprise Module EDX.
  22. Network Access to HASP HL-Net Key will be discontinued: ASPEN OneLiner, Power Flow, and DistriView software (ASPEN software) released after January 1, 2022 will no longer work with “Network access to HL-Net key”. Click on THIS LINK to view the ASPEN blog post with additional details (PDF version of the blog post is available at THIS LINK).
  23. New and updated overcurrent curves:
    Library STANDARD.RLY: Revised the equation for IEEE curves:IEEE-LTEI*, IEEE-LTI*, IEEE-LTVI*, IEEE-STEI*, IEEE-STI*
    Library AREVA.RLY: ALSTOM IEC Standard curves
    Library S&C.RLY: S&C Trip Saver II cutout mounted recloser
    Library Mersen.RLY: AMP-TRAP Class L fuse, Medium Voltage OSP Shortie
    Library Siba.RLY: Siba URS Fuse
    Library Hi_Tech.RLY: Trans-Guard OS Shorty 17.2kV Oil submersible back-up current-limiting fuse
    Library Eaton.RLY: Eaton Type T Silver Fuse Link, , AB DE-ION circuit breakers Series C F-frame circuit breakers
    Library COOPER.RLY: Cooper Bay-O-Net Dual Element 108C fuse link In Transformer Oil, Cooper 8.3, 15.5, 23.0 KV X-Limiter Full Range Parallel Mounted Fuse.