Network RMS Study
Understanding the Network RMS Study for Effective SWIS Integration
We’re dedicated to ensuring a seamless integration of new connections into the South West Interconnected System (SWIS). The Network RMS study plays a crucial role in this process by assessing the network impacts of integrating the Customer's Facility under various operational scenarios.
Key aspects of the Dynamic State Study
The Network RMS study is performed under system intact, N-1 and N-1-1 contingencies. These studies are to assess the adequacy of the model tuning via the compliance check of the Facility’s performance in the SWIS model against clauses in the Technical Rules (TR) and the Electricity System Market Rules (ESMR). These clauses are listed below and are in accordance with the type of the Facility:
| Criteria | Clause |
|---|---|
| Transient Rotor-Angle Stability | TR 2.2.7 |
| Oscillatory Rotor Angle Stability | TR 2.2.8 |
| Short Term Voltage Stability | TR 2.2.9 |
| Temporary Over-Voltages | TR 2.2.10 |
| Dynamic reactive power capability | ESMR A12.3.2.1 |
| Continuous uninterrupted operation (post-fault active power) | ESMR A12.9.2.5.(b) |
| Droop response | ESMR A12.6.1.10 |
| Rate of response | ESMR A12.6.2.1. (b) and (c) |
| Power system oscillations damping adequacy; No degradation of damping performance of power system; and Power system stability requirement |
ESMR A12.4.2.2 |
| Voltage Control System - support network voltage during fault | ESMR A12.4.2.5.(b) |
| Frequency Droop Response | ESMR A12.6.1.10.(a) and (b) |
| Continuous Uninterrupted Operation - 90% < nominal voltage < 110% | ESMR A12.8.2.1 |
| Continuous Uninterrupted Operation - specified disturbances requirements | ESMR A12.9.2.2 |
| Reactive current damping adequacy | ESMR A12.9.2.7 |
These assessments provide critical insights into whether modifications to the SWIS are necessary to accommodate the connection and interaction of your Facility with the network.
When considering the security of the system it is important that AEMO is engaged regarding operational limitations which may impact the design of the network and your Facility. It’s recommended that generation customers conduct their own economic modelling of Wholesale Electricity Market (WEM) constraints and contingency risks to ensure your project is economically viable before proceeding with your connection.
Options for Conducting your Network RMS Study
Western Power offers two approaches for completing the study:
- Western Power Expertise: Utilising our in-house expertise or collaborating with our panel suppliers, we can conduct the study for the integration of your Facility model to our SWIS model (PowerFactory). Our team's proficiency ensures a comprehensive evaluation, aligning with the latest industry standards and technological advancements.
- Network RMS Self-Serve: You have the option to self-perform the study either by engaging an external consultant directly or using your in-house expertise. This process involves using the SWIS model and study package, with Western Power verifying the outcomes. Each individual service provider must register with Western Power by providing:
- Professional details (name, organisation, contact details (email and telephone number).
- National Engineers Register (NER) number.
- Qualifications and experience in conducting technical studies related to transmission network connections (examples to include steady state study, network RMS and EMT studies, GPS assessments, model assessments).
Access to the Dynamic Encrypted SWIS Model
You can request the SWIS model by filling in our SWIS Base Model Terms of Use declaration form.
The RMS SWIS model (encrypted) is not accessible prior to submitting a connection application and is only available to Customers that have a current application with Western Power and meet the requirements to undertake the self-serve approach. A project specific confidentiality agreement needs to be set up with the consultant undertaking the study for Western Power to share the encrypted SWIS Base Model. Please contact your Senior Access Consultant to walk you through this process.