The French nuclear plants, although a remarkable achievement, have had mutiple shutdowns of many units due to lack of adequate cooling - just when they're most needed ( during summer heat waves ).
"supplementing their "nuclear free" grid capacity with power generated in french nuclear plants" - it's true that a very significant chunk of French nuke power is exported - because it's too difficult to ramp more than a few plants up & down so the benefits cut both ways.
Yes, Denmark produced 110% of its demands - for less than 2 hours, on a warm afternoon with historic low demands
Actually, it peaked at 140% and it was high for a LOT longer than "less than 2 hours"
From a low of 390 MW at 10pm on July 7th, 2015, wind power production on the DK-West grid rose to 1 GW by 2am on July 8th, then to 2 GW by 8am and peaked just over 3GW by 3pm on July 9th.
At no time between 9am on July 8th and 7pm on July 10th did wind power on DK-West drop below 2GW and for the bulk of that period of two and a half days it was above 2.6GW. Gross power consumption on DK-West varied from 1.8GW - 2.8GW during that time.
For DK-East, wind power production from 6am on July 8th to 9pm on July 10th varied from 400MW to 920MW and for >80% of the time was above 800MW.
DK-East gross power consumption was from 1 - 1.6GW during that period.
"Interconnectors allowed 80% of the power surplus to be shared equally between Germany and Norway, which can store it in hydropower systems for use later. Sweden took the remaining fifth of excess power". Looks like it was of some benefit to the neighbors.
and "The figures emerged on the website of the Danish transmission systems operator, energinet.dk, which provides a minute-by-minute account of renewable power in the national grid. The site shows that Denmark’s windfarms were not even operating at their full 4.8GW capacity at the time of yesterday’s peaks"