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

Balancing · hour 16 · 2026-05-29

Stage status timestamp (balancing complete): 2026-05-29T17:50:00Z

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)

R865.47 / MWh

Indicative balancing price

R2000.00 / MWh

Net system imbalance

-6.8 MWh

system short (under-delivery)

Per-party imbalance settlement

Metered outturn vs final schedule. A modelled residual under-delivery of 6.8 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)	28264.6	28257.8	-6.8	R2000.00	R-13666.67

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=16 seed=42
[reclearIntraday] slip party=agg_renewables_01 -12.8% dam=18000 revised=15705 gap+=2295
[reclearIntraday] slip party=gen_ipp_solar_bw5_01 -8.9% dam=67620 revised=61576 gap+=6044
[reclearIntraday] slip party=gen_ipp_wind_01 -5.8% dam=92160 revised=86844 gap+=5316
[reclearIntraday] residual_gap=13655 backfilled=13655 uncovered=0 idm_smp=86547c backfill_awards=1
— BALANCING —
[computeBalancing] day=2026-05-29 hour=16
[computeBalancing] party=gen_eskom_coal_01 sched=1695875 metered=1695465 imb=-410 price=200000c amount=-1366667c
[computeBalancing] net_system_imbalance=-410 balancing_price=200000c