Guidelines and Use Cases for Power Systems Dynamic Modeling and Model Verification using Modelica and OpenIPSL

Abstract

This paper offers systematic guidelines for modeling power systems components in the phasor time-domain using the Modelica language and their verification. It aims to share the authors’ experience in power system modeling with Modelica and the approaches used to meet the high expectations of the power industry w.r.t. to the models’ simulation results. While the modeling guidelines are generic, the verification procedure includes the validation against a domain-specific commercial software tool called PSS®E that is the de facto tool used for power system transmission planning and analysis. To formalize the proposed approaches, a schematic description of the processes of model implementation and validation is elicited through flowcharts. Challenging use cases are presented to point out some of the major difficulties that can be faced in the modeling steps because of unclear or missing documentation of the models’ dynamics in the reference tool. Finally, unique features of the Modelica language that allow for power system modeling and verification unavailable in traditional tools are illustrated.