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

Balancing · hour 12 · 2026-05-29

Stage status timestamp (balancing complete): 2026-05-29T13:50:00Z

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)

R847.99 / MWh

Indicative balancing price

R2000.00 / MWh

Net system imbalance

-12.9 MWh

system short (under-delivery)

Per-party imbalance settlement

Metered outturn vs final schedule. A modelled residual under-delivery of 12.9 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)	28324.5	28311.5	-12.9	R2000.00	R-25900.00

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=12 seed=42
[reclearIntraday] slip party=agg_renewables_01 -7.5% dam=18000 revised=16657 gap+=1343
[reclearIntraday] slip party=gen_ipp_solar_bw5_01 -14.4% dam=101280 revised=86726 gap+=14554
[reclearIntraday] slip party=gen_ipp_wind_01 -14.9% dam=67140 revised=57150 gap+=9990
[reclearIntraday] residual_gap=25887 backfilled=25887 uncovered=0 idm_smp=84799c backfill_awards=1
— BALANCING —
[computeBalancing] day=2026-05-29 hour=12
[computeBalancing] party=gen_eskom_coal_01 sched=1699467 metered=1698690 imb=-777 price=200000c amount=-2590000c
[computeBalancing] net_system_imbalance=-777 balancing_price=200000c