Asset testing

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Guidance for Asset Owners on planning and notifying the System Operator of tests that may impact the power system.

Testing Requirements

Whether you are performing routine or special case checks, or are progressing through the commissioning generation process, testing helps you to demonstrate that you can meet your Code obligations by clarifying your asset’s capabilities. The System Operator has prepared the following documents to help you understand what testing we require, depending on your asset:

DocumentWhat it’s for
GL-EA-010 Generator Testing RequirementsDetails requirements for demonstrating the performance and limitations of generating assets through testing.
GL-EA-765 Grid Asset Test RequirementsDetails testing requirements for grid assets other than generators, including STATCOM and SVC.
GL-EA-766 Distribution Asset Test RequirementsOutlines testing requirements for distribution assets

If you have any questions about any of the requirements that may apply to you, reach out to [email protected].

Submitting Test Plans

The Code requires Asset Owners to advise the System Operator of proposed testing that would result in certain changes at the grid interface. You must also inform us if your testing aims to demonstrate asset capability or may affect our ability to meet our Principal Performance Obligations (PPOs). Such situations may include: 

  • Distributors conducting drop load testing
  • Generators conducting reactive capability testing
  • Load rejection testing
  • Indication and measurement testing

You must complete and submit operational test plans for all such situations. Please fill out our FM-EA-010 form and email it to [email protected]. If you are planning to test single-frequency keeping capability in particular, use FM-EA-502 SFK Test Plan.

It is important to send test plans to the System Operator at least 15 business days before planned testing, as your testing may have effects that we must mitigate with our own operational planning. If you cannot provide the required advance notice, you must contact the Duty Operations Manager at 07 843 0618. Consult them also if you are unsure whether your testing will have a wider impact on the power system.

To find out more about how asset test plans are managed within the System Operator, refer to our PR-EA-010 Planned and Urgent Asset Testing document.

DocumentWhat it's for?
DT-EA-601 Extended Reserve Example TRS Compliance ReportTemplate for providing details to prove an installation’s compliance with the Technical Requirement Schedule (TRS).

After Testing

Following your operational testing , please:

  • update your Asset Capability Statement 
  • submit your test results
  • submit a validated model of your asset to the System Operator if the connection is new. 
    • If the connection is not new, but the test demonstrated that the performance of your generating asset has changed, you should also submit a validated model to the System Operator. 
    • If the performance of the plant has stayed the same, then you should share the test results and confirm no changes to your plant’s mathematical model are required.

Learn more about our modelling requirements by visiting our Power System Studies and Modelling page.

Fault ride through testing

Details of the study case and assumptions required by asset owner’s to evaluate compliance against the fault ride through and temporary over-voltage envelopes has been published by Transpower, as outlined in clause 8.25A(3) of the Electricity Industry Participation Code.

For further information please contact us at [email protected].