interestingly, the same question was asked last time this news appeared.
A100's TDP by Nvidia's spec sheet is ~350W.
so 100,000 of A100 leads to 35,000,000W (35MW), we can double or triple it to also include other power consumptions for CPUs & heat management, which means <100 MW.
let's say 100MW, if this system runs 24 hours with 100% utility, for each year it consumes 100MW * 24 * 365 = 876GWh or 0.876 TWh
since this new demand emerged in 9 months, so if China keeps adding the same systems at the same pace, then it needs to provide an extra 0.876 / 9 * 12 = 1.168 TWh electricity to power them.
On average, China adds ~250 TWh of energy generation capacity per year, so this newly added system occupies < 0.5% of China's newly added energy capacity.
fun part:
some other nations' annual electricity generation numbers(2022), as a comparison:
Germany: 582 TWh
France: 469 TWh
UK: 325 TWh
Italy: 279 TWh
yes, China basically adds electricity generation capacity equivalent to an entire Italy, per year. furthermore, in 2021, China set its record and added 750 TWh of electricity generation capacity, which is ~ 125% of Germany.
Total electricity generation - Our World in Data