Expanding an Open-Source Modelica-Compliant Package of Generic Renewable Energy Source Models: Implementation of the REEC_D and REGC_B Models in Modelica and OpenIPSL

Abstract

Power systems undergoing large-scale renewable deploymentrequire accurate dynamic models of inverter-basedtechnologies such as solar photovoltaic plants, windturbine generators, and battery energy storage systems toperform the require studies that would allow to assess andmaintain power grid stability. The second generation of theWestern Electricity Coordinating Council (WECC) genericrenewable energy system (RES) models provides a generalframework for modeling inverter-based resources in powersystem dynamics and stability studies. In this paper, weexpand the existing Modelica-compliant open-sourceOpenIPSL.Electrical.Renewables package by implementing theRenewable Energy Generator/Converter B (REGC_B) model alongwith the Renewable Energy Electrical Controller (REEC\D)model, according to the second-generation WECC RESframework. Using Modelica's object-oriented features, theimplementation emphasizes modularity and reusability inbuilding scalable power system models using the OpenIPSLlibrary. This work highlights the potential of usingModelica and OpenIPSL to support a standardized, scalabledevelopment of inverter-based RES models within the WECCframework, and extents the only fully Modelica-compliantopen-source package that implements these models.