Earlier this week I came across an article about how New England Solar was planning to sell off its solar farms in Australia due to the impact of network congestion:
New Energy Solar’s CEO Liam Thomas said a flood of new projects had resulted in curtailment challenges spreading to other parts of the grid and cut the output of the Manildra solar farm by 40 per cent just as the company was looking for a buyer.
I thought that it would be interesting to dig into some of AEMO’s constraints data in order to investigate exactly how Manildra Solar Farm has been impacted by network congestion in FY-21.
Interestingly, it appears that the vast majority of the time a constraint impacted this solar farm, it could be attributed to a single factor: the 132 KV Molong to Orange North transmission line which you can see in the map below. This transmission line has a thermal limit that determines how much power can flow through it from generators in the area.