Post by Dietmar Beck

Handling of ramps, shorter MTUs Let’s discuss some Pros and Cons for shorter MTUs: Future (extreme) solar-ramps with 15min MTU will lead to under feed-in at the beginning of the 1/4hour resp. over feed-in at the end (instantaneous power related to 1/4h average, relevant for the balancing/market products). This will lead to frequency ups and downs and rumbling of aFRR, if handable at all. With a shorter MTU the effect would be significantly reduced, max 2 GW deviations instead of 6 GW peaks at the beginning and the end of the 1/4h, for a 200 GW solar ramp). However there seem to be arguments against, at least questions: Could our current/ future IT-systems and especially the German Mabis-Hub handle times 3 data? In 2030 we will have approx. 60. Mio. metering devices in Germany (20 Mio. iMSys / 40 Mio. mME). Means each day 60 Mio. times 96 values with current MTU, times 288 values at 5min MTU, times 30/31 for the monthly settlement of balancing deviations).   Would the current metering devices be easily adjustable for shorter MTUs? For (Flow-based) XB-capacity calculations we even today (can) only compute 24 daily domains, hence 96 (European-) network models not available, 288 even crazy? Happy to discuss (additional) pros and cons with you. Seems that we need alternatives to handle future ramps (solar, as explained above) but also ramps of battery devices (they can and want to operate infinite ramps to hit the high price ¼ hours). Which alternatives do we have? Artificial ramping via the settlement of balancing deviations, means creating incentives not to physically operate infinite ramps but accounting infinite ramps for securing the business cases ?