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

Balancing · hour 09 · 2026-05-29

Stage status timestamp (balancing complete): 2026-05-29T10:50:00Z

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)

R854.47 / MWh

Indicative balancing price

R2000.00 / MWh

Net system imbalance

-7.5 MWh

system short (under-delivery)

Per-party imbalance settlement

Metered outturn vs final schedule. A modelled residual under-delivery of 7.5 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)	28470.7	28463.2	-7.5	R2000.00	R-14966.67

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=9 seed=42
[reclearIntraday] slip party=agg_renewables_01 -15.6% dam=18000 revised=15188 gap+=2812
[reclearIntraday] slip party=gen_ipp_solar_bw5_01 -4.1% dam=67620 revised=64827 gap+=2793
[reclearIntraday] slip party=gen_ipp_wind_01 -11.6% dam=81120 revised=71742 gap+=9378
[reclearIntraday] residual_gap=14983 backfilled=14983 uncovered=0 idm_smp=85447c backfill_awards=1
— BALANCING —
[computeBalancing] day=2026-05-29 hour=9
[computeBalancing] party=gen_eskom_coal_01 sched=1708243 metered=1707794 imb=-449 price=200000c amount=-1496667c
[computeBalancing] net_system_imbalance=-449 balancing_price=200000c