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

Balancing · hour 19 · 2026-05-29

Stage status timestamp (balancing complete): 2026-05-29T20:50:00Z

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)

R2219.54 / MWh

Indicative balancing price

R2552.47 / MWh

Net system imbalance

-600.0 MWh

system short (under-delivery)

Per-party imbalance settlement

Metered outturn vs final schedule. A modelled residual under-delivery of 600.0 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)	30000.0	29400.0	-600.0	R2552.47	R-1531482.00

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=19 seed=42
[reclearIntraday] slip party=agg_renewables_01 -7.1% dam=18000 revised=16722 gap+=1278
[reclearIntraday] slip party=gen_ipp_wind_01 -12.9% dam=65640 revised=57140 gap+=8500
[reclearIntraday] residual_gap=9778 backfilled=0 uncovered=9778 idm_smp=221954c backfill_awards=0
— BALANCING —
[computeBalancing] day=2026-05-29 hour=19
[computeBalancing] party=gen_eskom_coal_01 sched=1800000 metered=1764000 imb=-36000 price=255247c amount=-153148200c
[computeBalancing] net_system_imbalance=-36000 balancing_price=255247c