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

Balancing · hour 08 · 2026-05-29

Stage status timestamp (balancing complete): 2026-05-29T09:50:00Z

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)

R847.24 / MWh

Indicative balancing price

R2000.00 / MWh

Net system imbalance

-12.7 MWh

system short (under-delivery)

Per-party imbalance settlement

Metered outturn vs final schedule. A modelled residual under-delivery of 12.7 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)	28403.0	28390.3	-12.7	R2000.00	R-25366.67

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=8 seed=42
[reclearIntraday] slip party=agg_renewables_01 -14.7% dam=18000 revised=15359 gap+=2641
[reclearIntraday] slip party=gen_ipp_solar_bw5_01 -15.5% dam=47400 revised=40030 gap+=7370
[reclearIntraday] slip party=gen_ipp_wind_01 -13.3% dam=115800 revised=100431 gap+=15369
[reclearIntraday] residual_gap=25380 backfilled=25380 uncovered=0 idm_smp=84724c backfill_awards=1
— BALANCING —
[computeBalancing] day=2026-05-29 hour=8
[computeBalancing] party=gen_eskom_coal_01 sched=1704180 metered=1703419 imb=-761 price=200000c amount=-2536667c
[computeBalancing] net_system_imbalance=-761 balancing_price=200000c