Asset Testing

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Participants should agree a test plan with the System Operator when they intend to perform system tests or tests to ascertain asset capability, and when the tests may impact on the System Operator's ability to comply with its Principal Performance Objectives (PPOs).

Examples of the types of tests include distributors conducting drop load tests and generators conducting reactive capability, load rejection or indication and measurement tests.

Asset Owners are to use the Test Plan Form to notify the System Operator of their intention to conduct system tests. For routine and planned asset tests, the completed forms are to be submitted at least 15 business days in advance for approval. This allows the System Operator and Asset Owners to put in place any necessary operational plans to mitigate the effects of the tests. Where the required advance notice cannot be provided, you will need to contact the Duty Operations Manager.

If you are an Asset Owner and are unsure whether system tests will affect the System Operator's ability to comply with the PPOs, please consult the Duty Operations Manager on 07 843 0618

PR-EA-010 Planned and Urgent Asset Testing [ pdf 482.42 KB ]
FM-EA-010 Asset Test Plan Form [ docx 95.03 KB ] (MS Word)
FM-EA-502 Single Frequency Keeper Test Plan [ docx 78.63 KB ] (MS Word)
GL-EA-010 Companion Guide for Testing of Generating Assets [ pdf 1.67 MB ]
GL-EA-765 Companion Guide for Testing of Grid Assets [ pdf 1.29 MB ]
GL-EA-766 Companion Guide for Testing of Distribution Assets [ pdf 1.18 MB ]
DT-EA-601 Extended Reserve Example TRS Compliance Report [ docx 492.18 KB ] (Testing described in GL-EA-010)
GL-EA-959 Asset Capability Information Overview [ pdf 305.53 KB ]

Modelling Requirements

This guide is intended to provide direction to Asset Owners and their Consultants who submit mathematical models of power system equipment to the System Operator in New Zealand to ensure models are fit-for-purpose and appropriately validated prior to submission. This should help eliminate rework by Asset Owners which can be a costly and time-consuming process.

GL-EA-716 Power Plant Dynamic Model Validation and Submission Prerequisites [ pdf 1.27 MB ]
PowerFactory Example For Asset [ zip 1.61 MB ]

​Electricity Industry Participation (Dispatch Compliance Minor Amendment) Code Amendment 2013

Clause 13.82(h) of the Code is amended to allow generators and ancillary service agents to depart from a dispatch instruction if the participant has no reasonable means of complying with the instruction while acting in accordance with a commissioning or test plan. A commissioning or test plan must expressly allow a generator or ancillary service agent to depart from the dispatch instruction for clause 13.82(h) to apply.

Letter - Electricity Industry Participation (Dispatch Compliance Minor Amendment) Code Amendment 2013 [ pdf 71.86 KB ]

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

Generation Fault Ride Through [ pdf 611.76 KB ]