Development and Deployment of Generic Models for Grid Code Compliance Studies

Abstract

A challenge faced by many Transmission System Operators (TSO) is how to adequately represent Inverter Based Resources (IBR) within TSO network models. At present most TSOs require a series of Grid Code compliance studies to be provided as part of the connection process, which use detailed vendor models. These are often encrypted, very detailed and contain multiple instances of the same controller for each sub-unit within a plant. This can be challenging to implement into existing TSO network models, and thus becomes a significant time and cost constraint. This paper demonstrates that the majority of IBR plant and the associated performance requirements, can be adequately represented using generic open source aggregated WECC models. A 50 MW, Battery Energy Storage System (BESS) plant connected to the UK network, following the UK Grid Code / RfG requirements, is studied by developing and deploying a aggregated Western Electricity Coordinating Council (WECC) model in DIgSILENT Powerfactory and is presented as a benchmark system.