Aggregator route /api/strommix now reads three RustyCMS history-mode
collections in parallel — strommix_history_de, price_de_history,
crossborder_history_de — and projects derived metrics on top of the raw
upstream snapshots stored there:
- todayHourly: per-slot Last + Wind+Solar for the residual-load chart
- negPriceHoursYtd: count of YTD slots where DE-LU day-ahead < 0
- crossborderTodayGwh / netCrossborderGwhYtd / crossborderByCountryGwhYtd:
GW × slot-hours integrated into a per-country GWh balance
- lastDunkelflaute / worstDunkelflauten: contiguous runs where
(wind+solar)/load drops below 10 % for at least 1 h, top 5 by duration
All four are null-graceful — collections that the CMS hasn't backfilled
yet leave the corresponding panel hidden instead of breaking the widget.
Five new components in lib/components/blocks/strommix/:
- ResidualLoadChart.svelte — SVG line chart, no chart-lib dep
- CapacityFactorBars.svelte — live vs installed Wind/Wind-Off/Solar
- DunkelflauteCounter.svelte — last phase card + top-5 list
- NegPriceCounter.svelte — YTD hours + manual EinsMan compensation
- FlowBalanceTodayYtd.svelte — today + YTD saldo with per-country breakdown
Block schema additions (block-types.ts + strommix-default.json5 in
cms_content): installed_*_gw / installed_as_of for the capacity-factor
bars (BNetzA Marktstammdatenregister snapshot, manually maintained), and
einsman_costs_ytd_eur_mio / einsman_costs_as_of for the NegPrice panel
(BNetzA quarterly report figures, no API).
Peter Meier