Power system model development
Power system models for DER and load
AEMO is improving power system models to better represent the behaviour of DER and load during power system disturbances.
PSS®E models for load and distributed PV in the NEM
In collaboration with Network Service Providers (NSPs), AEMO has developed dynamic models to represent the aggregate behaviour of distributed PV and composite load during NEM power system disturbances. The development of these models, and their validation against historical disturbances is documented in this report:
The models have been calibrated against fifteen different historical disturbances occurring in QLD, NSW, SA and VIC during 2018 to 2021, and are designed to represent distributed PV shake-off in response to voltage disturbances, achieving an uncertainty margin of ±30%.
The intention is for the models to be used by Transmission Network Service Providers to review network stability limits in periods with high levels of distributed PV generation, so that the possibility of distributed PV shake-off can be incorporated into those limits. This will allow limits to be updated to consider the increasing role of distributed PV in determining the operating envelope of the power system.
These models represent a first version, and continuing refinement and improvement is expected.
Other models in development
AEMO is also actively working on development and validation of the following models:
PSCAD models for load and distributed PV in the NEM (anticipated completion in mid-2023)
models for load and distributed PV in the SWIS (anticipated completion in 2023)
Further supporting materials
Materials prepared to support the parameters and development of these models include:
PEACE Consulting: Developing Dynamic Load Models for the Australian Eastern Interconnected System
This report provides an overview of the development and calibration of the first versions of AEMO’s load and DER power system models.3.03 MB
Delta Q Consulting: Commercial Load Composition
This report provides a detailed assessment of the composition of commercial load in each NEM region. The analysis is a foundation for development of AEMO’s load models in power system modelling platforms (PSS®E and PSCAD).3.29 MB
Energy Efficient Strategies (EES) Consulting: Air conditioning and refrigeration load composition
This report provides a detailed assessment of the proportion of load related to single phase air conditioning and refrigeration. This is another key input to AEMO’s load model development.4.66 MB
Energy Efficient Strategies (EES) Consulting: Stall measurements for refrigerators
This report provides field measurements conducted on a range of household and commercial refrigerators. This provides insight into the behaviour of these devices during power system disturbances, to inform AEMO’s model development.2.83 MB
These reports may be useful to those stakeholders utilising AEMO’s models. For further information regarding these reports and the models being developed by AEMO, contact DERProgram@aemo.com.au.