Tag Archives: constraint

Article: AEMO updates generator combinations for SA system strength

AEMO has adjusted the formula (i.e. constraint equations) used to manage system strength in South Australia, which has been (since mid-2017) by constraining down the output of wind farms under certain conditions.

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Article: Why is wind production being curtailed (or “dispatched down”, more strictly speaking)?

It was inevitable that Semi-Scheduled plant would start to experience times when they are dispatched down. It’s a big prompt to take next steps up the learning curve.

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Article: How much wind-powered electricity production has been curtailed in SA since these new constraints were invoked?

An article that sums up some decidedly un-quick calculations we’ve performed – looking over an 8 week period to 13th September to estimate how much wind power has been curtailed by the AEMO.

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Article: Wind Farm output in SA constrained, again, by AEMO’s “System Strength” constraint

A quick note about high wind speeds in South Australia this afternoon leading to AEMO constraining wind farm output down for System Strength reasons.

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Article: Revisiting 2nd January 2013 in Queensland – to illustrate the interaction of rebidding and constraints

Beginning prior to 7am and progressing through the morning of Wednesday 2nd January 2013, there was significant volatility in the Queensland region of the National Electricity Market – including four spikes at or above $1,000/MWh.

Here’s a walk-through of how it unfolded, with some pointers to some of the contributing factors.

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Article: The 871-855 constraint returns

A snapshot of an instance of the Queensland regional constraint, which has returned after an absence over the autumn months.

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