Shadow-day · stage 3 of 4 · balancing & imbalance

Balancing · hour 10 · 2026-05-29

Stage status timestamp (balancing complete): 2026-05-29T11:50:00Z

Illustrative imbalance pricing (Trading Rules R2 §07 placeholder formula). Balancing consumes the final post-IDM schedule and prices each party's deviation from it against the metered outturn.

Reference SMP (IDM)

R837.18 / MWh

Indicative balancing price

R2000.00 / MWh

Net system imbalance

-16.3 MWh

system short (under-delivery)

Per-party imbalance settlement

Metered outturn vs final schedule. A modelled residual under-delivery of 16.3 MWh sits on Eskom Holdings — coal fleet (Generator) so the balancing market has a real action to price.

Party	Final sched (MWh)	Metered (MWh)	Imbalance (MWh)	Imb. price (R/MWh)	Amount
Eskom Holdings — coal fleet (Generator)	28211.4	28195.1	-16.3	R2000.00	R-32600.00

Audit chain

Commit this balancing run to the append-only SHA-256 chain (balancing_complete event).

Full IDM + balancing transcript

[reclearIntraday] day=2026-05-29 hour=10 seed=42
[reclearIntraday] slip party=agg_renewables_01 -12.9% dam=18000 revised=15677 gap+=2323
[reclearIntraday] slip party=gen_ipp_solar_bw5_01 -18.6% dam=83940 revised=68304 gap+=15636
[reclearIntraday] slip party=gen_ipp_wind_01 -14.9% dam=97980 revised=83334 gap+=14646
[reclearIntraday] residual_gap=32605 backfilled=32605 uncovered=0 idm_smp=83718c backfill_awards=1
— BALANCING —
[computeBalancing] day=2026-05-29 hour=10
[computeBalancing] party=gen_eskom_coal_01 sched=1692685 metered=1691707 imb=-978 price=200000c amount=-3260000c
[computeBalancing] net_system_imbalance=-978 balancing_price=200000c