Simulation Studies and Modelling Requirements
Importance of Simulation Models
Simulation models are important for assessing the impacts of the installations on the network.
Customers are required to:
- Develop accurate models of their facilities
- Conduct simulation studies using the models
- Submit their self-assessment studies to SONI
Requirements for WECC Models
Customers Required to Submit WECC Models
SONI doesn’t require any WECC model submission from the DSO customers < 5MW.
Generator Type | Customer Type | Registered Capacity |
|---|---|---|
Wind Farms Solar PV Plants Battery ESPS | TSO Customers | All Customers |
Wind Farms Solar PV Plants Battery ESPS | DSO Customers | Reg. Cap. ≥ 5 MW* |
WECC Study Submission Requirements
Item | Detail | Timeline |
|---|---|---|
Submission of WECC Model Parameters | Use our spreadsheet for WECC model parameters submission | At least 6 months before energisation |
Validation Report for the Provided WECC Model Parameters | As described in our Requirements for WECC Model Submission document | No later than 2 months after the completion of Grid Code Compliance Tests, including approval of the test reports by SONI |
EMT Model Specification Documents For All Customers
Electromagnetic transient (EMT) studies are now required to assess the impact of new connections to the transmission system and to ensure the reliability of the power system operated with high levels of wind and solar generation.
EMT model specifications provide guidance on model structure, fidelity, interoperability, and usability for a range of technologies, including BESS, Solar PV PPMs, HVDC systems, Wind Power Plants, Synchronous Generators, Synchronous Condensers, and other Converter-Based Reactive Support Systems.
The models are essential for capturing fast control dynamics, studying complex interactions, and supporting large-scale EMT simulation studies.
The documents below outline the technical requirements for model submission, integration, and ongoing maintenance in line with industry best practice.