South Australia System Strength Assessment
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In the 2016 National Transmission Network Development Plan, AEMO identified a Network Support and Control Ancillary Services gap to provide system strength in South Australia, and stated that the gap would be confirmed in 2017 after more detailed analysis was completed.
System Strength Assessment
AEMO has now conducted further power system studies to evaluate the adequacy of system strength for a range of operating conditions, including various levels of synchronous and non-synchronous generation, with normal operating conditions in South Australia.
This analysis has identified that a more complex arrangement of synchronous machines must remain online, to maintain sufficient system strength for various non-synchronous generation dispatch levels, as discussed in this report.
Independent Review of the South Australian Power System Modelling
AEMO has developed a highly-detailed, full-scale simulation model of the South Australian power system to improve its ability to assess system security with rapidly increasing amounts of non-synchronous generation. This integrated model was used to determine system strength operational requirements in SA.
AEMO has engaged both Power Systems Consultants (PSC) and Manitoba HVDC Research Centre (MHRC) to undertake separate, independent reviews of the models and methodology used to form the basis of the SA System Strength Assessment report and limits advice. The reviews have concluded that:
- AEMO have developed a criteria for system strength which is based on a well-founded methodology and a detailed and validated PSCAD model of the SA power system.
- It is reasonable to express the system strength requirements in terms of number of synchronous generators that must be online depending on the level of non-synchronous generation online.
PSC’s report is available here. (163 KB, pdf)
MHRC’s report is available here. (393 KB, pdf)