German Wind Swings Make Coal/Gas Dispatch More Volatile

German Wind Swings Make Coal/Gas Dispatch More Volatileby Andreas Franke, [email protected] -Edited by James Leech, [email protected]


German wind power output reached a new record this week, peaking above 33 GW overnight Tuesday, but dropped to just 1 GW by Friday, with coal and to a lesser extend also gas-fired power plants providing the flexibility needed to keep the system balanced, a Platts analysis of hourly generation profiles shows

by Andreas Franke, [email protected] -Edited by James Leech, [email protected]

German wind power output reached a new record this week, peaking above 33 GW overnight Tuesday, but dropped to just 1 GW by Friday, with coal and to a lesser extend also gas-fired power plants providing the flexibility needed to keep the system balanced, a Platts analysis of hourly generation profiles shows.

However, lower generation costs due to sharply lower coal, gas and carbon prices, weak demand and the return of solar output will limit the potential for spot prices to recover to their "usual" winter peak levels, with day-ahead baseload struggling to rise above Eur30/MWh.

Even with wind almost disappearing on Friday, maximum hourly prices barely reached Eur40/MWh after plunging to minus Eur19/MWh earlier this week, data from spot exchange Epex Spot and EEX transparency shows.

Spot power prices averaged just above Eur20/MWh for the first 12 days of February and, despite slightly colder and windier weather conditions forecast for the second half, this February is still on track for an average spot delivery below Eur23/MWh, compared with a Eur36/MWh average in February 2015, Platts data shows.

WIND RECORDS

Actual wind power output surpassed 33 GW for the first time ever on February 1, with four days registering wind peaks above 30 GW so far this month, while total daily wind generation on Monday reached a record 805 GWh, according to data from Fraunhofer ISE institute and EEX transparency, which collect near real-time data from TSOs.

Wind output during the first two weeks this February will be above 6 TWh, already double the total monthly output of last February, the data shows.

That compares with just 2.3 TWh of coal-fired output and only 0.8 TWh of gas-fired output so far this February as the massive swings in wind require unprecedented flexibility from conventional power plants and overall reduce the hours for the most-expensive forms of power generation, thereby depressing power prices.

Currently, coal-fired power plants provide most of this flexibility for swings in wind, with coal output ranging between a record 545 GWh on January 21 and just 109 GWh this Monday, the data shows.

For gas, the swing was from 261 GWh on January 21 to 66 GWh this Monday, although gas output is more driven by heating demand with some smaller CHP units not registered in the TSO data.

Another swing factor is cross-border power flows, with Germany also exporting record amounts of its oversupply across some 15 GW of cross-border links.

Germany boosted its wind power capacity by 12 GW over the past two years with the total now just above 45 GW, data from Platts Renewable Power Tracker shows.

Germany also added some 7 GW of highly-efficient new coal-fired power generation over the past two years with total coal-fired capacity around 27 GW, data from Platts Powervision shows.

(Platts.com, 12 Feb 2016)

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