Introduction to OmniPES: A Novel Modelica Library for Power Systems Modeling and Analysis

This paper introduces OmniPES, a Modelica library tailored for the swift prototyping of small to medium-scale power systems, facilitating analysis in both steady-state and transient conditions. The primary contribution of this new library is to enable the development and enhancement of models in an effective and efficient manner within a Modelica integrated development environment, without the need for external computational software. Notable features include sigmoid-based switches that enforce reactive power constraints in power sources during steady-state or quasi-steady-state operation. Moreover, the library incorporates a transient stability modeling framework, offering a structure akin to those utilized in production-grade power systems programs. These features are illustrated through a tutorial system operating under a secondary voltage regulation loop. The presented results validate and clearly demonstrate the accuracy and effectiveness of the proposed library.