Know Your NEM: Heating demand up, wind output down, but low prices locked in

Cherry-tree infigen energy wind farm turbine iberdrola - optimised
Infigen Energy’s Cherry Tree wind farm (credit: Infigen Energy).

Figure 1. Source: NEM Review
Left hand columns are for latest 30 day period, right hand columns for the moving average for last 12 months. Source: NEM Review

The last month has thrown up a few interesting data points. Most notably an increase in total demand in the National Electricity Market (all states except W.A. and NT) to an annualised level of 209 terawatt hours. That’s above last year and the highest level in four years for an annualised figure in this particular period.

Perhaps it’s the case that office air-conditioning and heating is more efficient than home heating, and now most are working from home. But who knows. Maybe it’s just the weather.

Another notable point is the collapse in wind output in all states except Queensland, but particularly in South Australia and Victoria, the two states with traditionally the biggest output of wind power in absolute terms.

As a result the overall share of variable renewable energy (VRE, or wind and solar) is below the same period last year.

VRE
Figure 2. Source: NEM Review

 

Figure 3. Source: NEM Review
Figure 3. Source: NEM Review

The result of the reduction in VRE was a jump  in spot prices for electricity to not much below last year, and despite low coal and gas prices:

Figure 4. Source: NEM Review
Figure 4. Source: NEM Review

But the medium term outlook over the next two years is still for sharply lower prices, with a mid point of around $50/MWh a good working number for FY22:

Figure 5 Source: ASX
Figure 5 Source: ASX

 

Figure 6. Source: NEM Review
Figure 6. Source: NEM Review

David Leitch is a regular contributor to Renew Economy and co-host of the weekly Energy Insiders Podcast. He is principal at ITK, specialising in analysis of electricity, gas and decarbonisation drawn from 33 years experience in stockbroking research & analysis for UBS, JPMorgan and predecessor firms.

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