Tesla big battery steps in after big Loy Yang coal unit trips, and arrests and reverses a dramatic fall in frequency – before the contracted coal unit had time to respond. The Tesla big battery is having a big impact on Australia’s electricity market, far beyond the South Australia grid where it was expected to time shift a small amount of wind energy and provide network services and emergency back-up in case of a major problem. Last Thursday, one of the biggest coal units in Australia, Loy Yang A 3, tripped without warning at 1. 59am, with the sudden loss of 560MW and causing a slump mind lies by daniel rechnitzer pdf frequency on the network.
What happened next has stunned electricity industry insiders and given food for thought over the near to medium term future of the grid, such was the rapid response of the Tesla big battery to an event that happened nearly 1,000km away. 129MWh had responded, injecting 7. 3MW into the network to help arrest a slump in frequency that had fallen below 49. Gladstone coal generator in Queensland. Gladstone injected more than Tesla did back into the grid, and took the frequency back up to its normal levels of 50Hz, but by then Tesla had already put its gun back in its holster and had wandered into the bar for a glass of milk. So why did the Tesla big battery respond when not contracted? One reason is because it can, and so it did.
The other reason is less clear, but more intriguing. It is contracted to provide such grid services by the South Australia government. Over the weekend was again illustrating its rapid fire charging and discharging. The rapid re-bidding is likely to change the market forever, particularly when the 5-minute settlement rule finally comes into effect in 2021.
It should be an interesting 2018. Note: The Tesla big battery is known to the grid as the Hornsdale Power Reserve, as it is located near the Hornsdale wind farm in South Australia, also owned and operated by Neoen. Hence the acronym HPR in such tables. Update: We just realised that a paragraph explaining the timings of the Tesla intervention went missing in the transfer from one document to another.
FCAS, the moment they dropped below 50Hz. The interesting thing here is the speed with which Tesla responded to the contingency FCAS market, which is triggered after frequency gets to 49. That was pretty much instantaneous. And they did it from a standing start, unlike the other generators.