Scope
QGE were part of a research consortium with the University of QLD (UQ), Powerlink, Manitoba Hydro and other parties to model the effects on the electricity grid based on the Queensland Government’s 50% renewable energy target for 2030 and beyond.QGE developed models for dynamically sizeable solar & wind farms and battery systems for the purpose of modelling the stability of the grid. The intention of this project was to design and develop a process and software tools for rapid deployment of grid connection electrical models that can be rapidly tuned to perform stably and meet the NER requirements.
Background
Connection of generators to the electrical grid is technically complex and requires dynamic modelling to ensure ongoing stability of the power system. The present transformation to renewable energy and battery storage is forecast to increase over the coming decades. This means that many new renewable generators and grid support technologies will need to be connected within Australia in a relatively short period.
QGE achieved the following technical objectives:
- Parameterised grid connection models in PSCAD & PSS/E
- Designed and developed a software tool to automate the control and stability tuning of the PSCAD and PSS/E models
- Designed and developed a software tool to automate the benchmark testing of the PSCAD and PSS/E models in an area wide model
Outcomes
Grid system strength and impedances have a significant impact on model performance and benchmark alignment. This can result in system instabilities which can be hard to overcome. Instabilities were resolved by QGE’s engineers, enabling the rapid deployment of the connected models in the state-wide QLD grid model.
The models and deployment methods developed by QGE were successfully deployed by the research team. The parameterized, resizable generation models can be created with acceptable alignment between PSCAD and PSS/E modelling packages, and can be rapidly deployed at a given grid connection point enabling a resizable model to be installed at multiple grid locations within hours.