ASPEN OneLiner software is a comprehensive engineering program for short-term analysis and coordination of relays, as well as calculating short-circuits for relay engineers. This software is a productivity tool that makes tedious and time-consuming tasks such as batch analysis of wells and drawing relay curves and single-line diagrams easy. ASPEN OneLiner works quickly and under the engineer’s control. The engineer can change relay settings and network configurations and see the results of the changes immediately. This software also includes an internal API engine that allows users to create custom programs for specific studies using Python and other programming platforms. ASPEN OneLiner software performs various tasks in the field of relays. You can use this software for modeling and analyzing the performance of relays in power systems. One of the main applications of this software in the field of relays is the analysis of protection and control of power systems. With ASPEN OneLiner, you can create accurate models of relays in your power network. You can simulate relay settings and examine their performance in different scenarios. You can also analyze the response of relays to events such as short circuits, voltage drops, and other potential issues. ASPEN OneLiner also has features for designing and optimizing relays. You can adjust relay parameters and ensure better performance in various scenarios. You can also improve the response time of relays through detailed analysis and ensure that your power system operates correctly under normal and abnormal conditions. Additionally, with ASPEN OneLiner, you can model the interaction of relays with other components of the power system. You can examine how relays interact with transformers, communications, and other components and ensure that all components of the power system operate in real coordination. Some features of ASPEN Oneliner include:

• Desktop application for Microsoft Windows with user-friendly graphical interface for easy use.
• Accurate modeling of two or three-winding transformers, phase shifters, lines, switches, series capacitors (with or without nonlinear MOV element), series reactors, DC lines (including VSC converters), generators, wind turbines, continuous converter sources, loads, shunts, and zero sequence coupling effects.
• Partial modeling of fuses, reclosers, and overcurrent relays. It has an extensive relay library that is user-editable.
• Partial modeling of distance relays using parameters and specific logic of operation for each type and model. User-defined distance relay methods using DLLs written in C++.
• Modeling of line differential relays, voltage relays, and protection and line recloser logic schemes.
• Simulation of various fault types: bus faults, line-end faults, external faults, mid-line faults, bus-to-bus faults, and breaker opening faults.
• Unlimited system size with moderate memory requirements. Very fast solving speed. Multi-core CPU parallel processing.
• Graphic display of post-fault response and relay operating time on single-line diagrams and phasor diagrams.
• Advanced analysis tools: step-by-step event analysis, bus fault summary, boundary equivalencing, voltage collapse analysis, fault location determination, electric arc flash analysis, and more.
• Automatic coordination check of overcurrent and distance relays, plus automatic review of overcurrent relay settings and instantaneous overcurrent relay settings.
• Automatic plotting of overcurrent and distance relay curves on the display screen, plus plotting time-distance diagrams based on faults for all types of relays.
• Tools for compliance with PRC standards: PRC-023-3, PRC-025-1, PRC-026, and PRC-027
• High-quality printing on various multi-page printers and plotters.
• Production of relay test files end-to-end in formats such as Doble, COMTRADE, and other formats.
• Management of internal model data with the ability to compare two-sided or three-sided files and project creation tools.
• Automatic generation of professional and customizable reports from short-term analysis and relay coordination results. You can create custom templates or layouts for your reports, display results as tables, graphs, or maps, and export your reports to Word, Excel, or PDF formats.
• Access to internal API for developing custom programs using Python and other programming platforms. You can exchange your data with software such as Excel, MATLAB, Python, or R using the ASPEN Oneliner API, or create custom programs for specific studies.