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

Balancing · hour 13 · 2026-05-29

Stage status timestamp (balancing complete): 2026-05-29T14:50:00Z

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)

R841.83 / MWh

Indicative balancing price

R2000.00 / MWh

Net system imbalance

-9.5 MWh

system short (under-delivery)

Per-party imbalance settlement

Metered outturn vs final schedule. A modelled residual under-delivery of 9.5 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)	27896.6	27887.1	-9.5	R2000.00	R-19000.00

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=13 seed=42
[reclearIntraday] slip party=agg_renewables_01 -19.7% dam=18000 revised=14456 gap+=3544
[reclearIntraday] slip party=gen_ipp_wind_01 -18.0% dam=85920 revised=70468 gap+=15452
[reclearIntraday] residual_gap=18996 backfilled=18996 uncovered=0 idm_smp=84183c backfill_awards=1
— BALANCING —
[computeBalancing] day=2026-05-29 hour=13
[computeBalancing] party=gen_eskom_coal_01 sched=1673796 metered=1673226 imb=-570 price=200000c amount=-1900000c
[computeBalancing] net_system_imbalance=-570 balancing_price=200000c