Event Database

Market Event History

Searchable database of Australian energy market events: price spikes, negative pricing, record renewable generation and major grid constraints. Each event is enriched with AI-generated causal analysis.

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988

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TAS

Constraint EventTASmajor9 Sept 2026, 05:55 pm

High-value binding constraint in TAS1: T_BLINK_TV_NGZ ($8352000 shadow price)

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Constraint EventNEMmoderate9 Sept 2026, 05:55 pm

High-value binding constraint in NEM: F_T+NIL_MRWF_TG_R6 ($403 shadow price)

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high_renewableTASminor9 Sept 2026, 04:55 pm

High renewable penetration in TAS1: 88.6%

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Negative PriceSAminor9 Sept 2026, 04:25 pm

Sustained negative pricing in SA1: $-20/MWh for 3 intervals

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Negative PriceTASminor9 Sept 2026, 03:40 pm

Sustained negative pricing in TAS1: $-15/MWh for 3 intervals

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high_renewableSAminor9 Sept 2026, 11:30 am

High renewable penetration in SA1: 94.0%

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Negative PriceSAminor9 Sept 2026, 10:35 am

Sustained negative pricing in SA1: $-8/MWh for 3 intervals

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Negative PriceVICminor9 Sept 2026, 10:25 am

Sustained negative pricing in VIC1: $-8/MWh for 3 intervals

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Negative PriceTASminor9 Sept 2026, 09:50 am

Sustained negative pricing in TAS1: $-8/MWh for 2 intervals

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Negative PriceSAminor9 Sept 2026, 04:45 am

Sustained negative pricing in SA1: $-1/MWh for 2 intervals

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Negative PriceVICminor9 Sept 2026, 04:35 am

Sustained negative pricing in VIC1: $-1/MWh for 2 intervals

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Negative PriceTASminor9 Sept 2026, 02:40 am

Sustained negative pricing in TAS1: $-2/MWh for 2 intervals

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Constraint EventTASmajor9 Sept 2026, 02:25 am

High-value binding constraint in TAS1: T_BLINK_TV_NGZ ($8352000 shadow price)

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high_renewableTASminor8 Sept 2026, 05:00 pm

High renewable penetration in TAS1: 92.1%

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Negative PriceTASminor8 Sept 2026, 03:05 pm

Sustained negative pricing in TAS1: $-15/MWh for 2 intervals

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high_renewableSAminor8 Sept 2026, 11:30 am

High renewable penetration in SA1: 85.4%

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Constraint EventTASmajor8 Sept 2026, 09:50 am

High-value binding constraint in TAS1: T_BLINK_TV_NGZ ($8352000 shadow price)

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Constraint EventNEMmoderate8 Sept 2026, 08:35 am

High-value binding constraint in NEM: F_S+SETB_L1 ($998 shadow price)

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high_renewableTASminor7 Sept 2026, 05:00 pm

High renewable penetration in TAS1: 87.3%

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Negative PriceQLDminor7 Sept 2026, 02:55 pm

Sustained negative pricing in QLD1: $-1/MWh for 2 intervals

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high_renewableSAminor7 Sept 2026, 10:30 am

High renewable penetration in SA1: 92.8%

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Negative PriceTASminor7 Sept 2026, 10:20 am

Sustained negative pricing in TAS1: $-1/MWh for 2 intervals

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Negative PriceNSWminor7 Sept 2026, 10:20 am

Sustained negative pricing in NSW1: $-1/MWh for 2 intervals

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Negative PriceVICminor7 Sept 2026, 10:20 am

Sustained negative pricing in VIC1: $-1/MWh for 2 intervals

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Negative PriceSAminor7 Sept 2026, 09:45 am

Sustained negative pricing in SA1: $-4/MWh for 2 intervals

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Constraint EventTASmajor7 Sept 2026, 08:35 am

High-value binding constraint in TAS1: T_BLINK_TV_NGZ ($8352000 shadow price)

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Negative PriceQLDminor7 Sept 2026, 07:30 am

Sustained negative pricing in QLD1: $-3/MWh for 2 intervals

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high_renewableTASminor6 Sept 2026, 05:00 pm

High renewable penetration in TAS1: 90.4%

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Negative PriceQLDmoderate6 Sept 2026, 01:40 pm

Sustained negative pricing in QLD1: $-34/MWh for 3 intervals

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high_renewableSAminor6 Sept 2026, 10:30 am

High renewable penetration in SA1: 90.8%

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Showing 30 of 988

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Recent Market Events

High-value binding constraint in TAS1: T_BLINK_TV_NGZ ($8352000 shadow price), TAS1, constraint_event, major
Tasmania experienced a major binding constraint event on 9 September 2026, with constraint T_BLINK_TV_NGZ reaching an exceptionally high shadow price of $8,352,000, causing significant price volatility across the settlement period. Regional prices spiked to $320.36/MWh by 07:55, up from a low of $61.16/MWh just 15 minutes earlier, reflecting acute system stress.
High-value binding constraint in NEM: F_T+NIL_MRWF_TG_R6 ($403 shadow price), NEM, constraint_event, moderate
A binding constraint (F_T+NIL_MRWF_TG_R6) with a marginal value of approximately $403/MWh became active in the NEM, indicating a localised network limitation was constraining dispatch during this period. This moderate-severity constraint event reflects transmission or generation congestion that required the market to accept higher prices to manage power flow within operating limits.
High renewable penetration in TAS1: 88.6%, TAS1, high_renewable, minor
Tasmania experienced high renewable penetration of 88.6% on 9 September 2026, with renewable sources (hydro, wind, and rooftop PV) dominating the generation mix across the observed settlement periods. Wholesale prices exhibited significant volatility during the early morning period, ranging from $20.12/MWh to $93.17/MWh across five-minute intervals.
Sustained negative pricing in SA1: $-20/MWh for 3 intervals, SA1, negative_price, minor
South Australia (SA1) experienced sustained negative pricing during the early morning of 9 September 2026, with the region settling at −$20/MWh in one interval and remaining negative across a 3-interval window. The period was characterised by high wind generation (1,370 MW) and moderate solar output (40 MW) coinciding with low demand typical of early morning hours.
Sustained negative pricing in TAS1: $-15/MWh for 3 intervals, TAS1, negative_price, minor
TAS1 experienced sustained negative pricing at approximately −$8/MWh across three consecutive intervals (05:45–05:50), with a spike to −$15.01/MWh at 05:45, driven by oversupply conditions during early morning low-demand periods. Wind generation remained elevated at 369–460 MW whilst hydro and gas-fired generation continued to operate, creating excess supply that the market cleared at negative prices.
High renewable penetration in SA1: 94.0%, SA1, high_renewable, minor
South Australia (SA1) experienced very high renewable energy penetration of 94.0% during the early morning period of 9 September 2026, driven predominantly by wind generation of 1,281.91 MW. Negative Regional Reference Prices (RRPs) ranging from −$7.01 to −$7.83 per MWh occurred across the six consecutive five-minute settlement intervals, indicating surplus renewable generation that required management through pricing signals.
Sustained negative pricing in SA1: $-8/MWh for 3 intervals, SA1, negative_price, minor
SA1 experienced sustained negative pricing at approximately −$8/MWh across three consecutive intervals during the early morning period of 9 September 2026. The region's generation mix was dominated by wind (1259 MW) and solar (113 MW combined), with minimal dispatchable generation, creating structural oversupply.
Sustained negative pricing in VIC1: $-8/MWh for 3 intervals, VIC1, negative_price, minor
VIC1 experienced sustained negative pricing at approximately -8/MWh across three intervals during the early morning of 9 September 2026. The region had high renewable generation (wind at 5,036 MW combined and solar at 849 MW) coupled with brown coal generation at 2,733 MW, creating an oversupply situation that drove prices negative.
Sustained negative pricing in TAS1: $-8/MWh for 2 intervals, TAS1, negative_price, minor
Negative pricing of approximately −$7.69/MWh occurred in TAS1 for two consecutive intervals (23:50 and 23:55 on 9 September 2026), representing a sharp reversal from the preceding $5.10/MWh baseline. The event was minor in severity and brief in duration, with prices recovering immediately thereafter.
Sustained negative pricing in SA1: $-1/MWh for 2 intervals, SA1, negative_price, minor
SA1 experienced sustained negative pricing at −$1.05/MWh during the 18:50 settlement interval on 8 September 2026, with negative prices persisting across 2 intervals. The event occurred during an evening period characterised by high wind generation (1558 MW) and minimal load-shedding capacity from battery and solar assets.
Sustained negative pricing in VIC1: $-1/MWh for 2 intervals, VIC1, negative_price, minor
VIC1 experienced sustained negative pricing reaching −$0.55/MWh across two intervals (18:35 and 18:45) on 8 September 2026, with prices hovering near zero in surrounding periods. The event occurred during elevated wind generation (approximately 5,901 MW combined) and brown coal baseload (2,934 MW), creating oversupply conditions in the region.
Sustained negative pricing in TAS1: $-2/MWh for 2 intervals, TAS1, negative_price, minor
TAS1 experienced sustained negative pricing at $-2.12/MWh across two consecutive intervals (16:40 and 16:50) on 8 September 2026. The event occurred within a narrow window of volatile pricing, with prices ranging from near-zero to $60.06/MWh across the surrounding half-hour periods.
High-value binding constraint in TAS1: T_BLINK_TV_NGZ ($8352000 shadow price), TAS1, constraint_event, major
Tasmania experienced a major constraint event on 9 September 2026 at 16:00–16:25 UTC, with binding constraint T_BLINK_TV_NGZ reaching an exceptional shadow price of $8.352 million/MWh. Regional reference prices fluctuated between $22.86 and $60.10/MWh during the five 5-minute settlement periods, indicating significant transmission or capability limitations.
High renewable penetration in TAS1: 92.1%, TAS1, high_renewable, minor
Tasmania experienced 92.1% renewable penetration during the early morning of 9 September 2026, with hydro and wind generation totalling approximately 3,653 MW against total generation of 3,964 MW. Regional reference prices rose from $102.68/MWh to a peak of $122.72/MWh at 06:50 UTC despite high renewable supply, before moderating to around $110/MWh by 07:00 UTC.
Sustained negative pricing in TAS1: $-15/MWh for 2 intervals, TAS1, negative_price, minor
TAS1 experienced sustained negative pricing at −$15/MWh across two consecutive intervals (05:05 and 05:10 on 8 September 2026), representing a minor severity event. Prices rebounded to the $24/MWh range in surrounding intervals, indicating the negative pricing was localised and temporary.
High renewable penetration in SA1: 85.4%, SA1, high_renewable, minor
South Australia (SA1) experienced high renewable energy penetration at 85.4% during the early morning period of 9 September 2026, driven predominantly by solar generation (907.8 MW combined) and wind output (38.6 MW). Spot prices during this period remained relatively moderate, ranging from $21.02 to $27.78/MWh, with minimal battery discharge and negligible OCGT contribution.
High-value binding constraint in TAS1: T_BLINK_TV_NGZ ($8352000 shadow price), TAS1, constraint_event, major
A binding constraint (T_BLINK_TV_NGZ) in TAS1 reached an exceptionally high shadow price of $8.352 million, indicating severe congestion or equipment limitation. This event occurred during a period of volatile pricing, with TAS1 RRP fluctuating between $20.12 and $52.14/MWh across the six settlement intervals, peaking in the 23:40–23:45 window.
High-value binding constraint in NEM: F_S+SETB_L1 ($998 shadow price), NEM, constraint_event, moderate
A high-value binding constraint (F_S+SETB_L1) with a shadow price of $998/MWh has emerged in the NEM, indicating significant transmission congestion or network limitations are restricting power flow and inflating marginal costs. This constraint is substantially more severe than concurrent binding constraints, which carry marginal values below $5/MWh, suggesting a localised but acute bottleneck in the network.
High renewable penetration in TAS1: 87.3%, TAS1, high_renewable, minor
Tasmania achieved 87.3% renewable energy penetration during the 06:35–07:00 UTC period on 7 September 2026, driven by combined hydro (2,286.6 MW) and wind (387.2 MW) generation. Despite high renewable supply, TAS1 region prices rose sharply from $41.21/MWh to $101.29/MWh across the six settlement periods.
Sustained negative pricing in QLD1: $-1/MWh for 2 intervals, QLD1, negative_price, minor
QLD1 experienced brief negative pricing in early morning of 7 September 2026, with the region reaching -$0.56/MWh during a single interval at 05:00 and remaining slightly negative (-$0.05/MWh) in the preceding interval. The negative pricing followed a period of zero or near-zero prices from 04:30 to 04:50, suggesting a temporary oversupply condition in the region during low-demand early morning hours.
High renewable penetration in SA1: 92.8%, SA1, high_renewable, minor
SA1 experienced very high renewable penetration of 92.8% during the early morning period of 7 September 2026, driven predominantly by wind generation (635.54 MW) and solar generation (448–461 MW). Negative and near-zero spot prices (ranging from −$4.32/MWh to $0/MWh) resulted from the substantial surplus of renewable energy supply relative to regional demand.
Sustained negative pricing in TAS1: $-1/MWh for 2 intervals, TAS1, negative_price, minor
TAS1 experienced sustained negative pricing during the 00:20–00:25 interval on 7 September 2026, with prices reaching −$0.58/MWh and −$0.57/MWh respectively. This minor pricing event occurred during a period of high renewable generation, with combined hydro output exceeding 1,867 MW and wind generation above 530 MW.
Sustained negative pricing in NSW1: $-1/MWh for 2 intervals, NSW1, negative_price, minor
NSW1 experienced sustained negative pricing at −$0.57/MWh across two consecutive intervals (00:20 and 00:25 on 7 September 2026). This occurred during an overnight period characterised by high solar generation (2,474 MW) and substantial wind output (551 MW), alongside significant coal baseload (2,575 MW), resulting in excess supply relative to demand.
Sustained negative pricing in VIC1: $-1/MWh for 2 intervals, VIC1, negative_price, minor
VIC1 experienced brief negative pricing in two consecutive intervals (00:20 and 00:25 on 7 September 2026), with prices reaching −$0.55/MWh. The event occurred during an overnight period characterised by high renewable energy supply (wind generation of approximately 4,854 MW and solar output of 1,093 MW) combined with significant brown coal generation (2,335 MW).
Sustained negative pricing in SA1: $-4/MWh for 2 intervals, SA1, negative_price, minor
South Australia (SA1) experienced sustained negative pricing at −$4.32/MWh across two consecutive five-minute intervals (23:45 and 23:50 on 6 September 2026), with the broader 2-hour window showing sporadic negative excursions. The region was operating with high renewable generation (443–794 MW from wind and solar) and minimal battery storage dispatch, creating conditions of excess supply relative to local demand.
High-value binding constraint in TAS1: T_BLINK_TV_NGZ ($8352000 shadow price), TAS1, constraint_event, major
A major binding constraint (T_BLINK_TV_NGZ) emerged in Tasmania with an exceptionally high shadow price of $8.352 million, indicating severe transmission limitations during the 22:10–22:35 period on 6 September 2026. Regional electricity prices remained relatively modest (ranging $18–$29/MWh) despite the constraint's extreme marginal value, suggesting the constraint actively suppressed potential price movements.
Sustained negative pricing in QLD1: $-3/MWh for 2 intervals, QLD1, negative_price, minor
QLD1 experienced sustained negative pricing at $-3/MWh across two consecutive intervals on 6 September 2026 at 21:30–21:35 AEST, following a steep price decline from $50.77/MWh. The negative pricing episode occurred during a period of substantial solar and wind generation (approximately 3,123 MW combined) alongside significant coal baseload output (4,118 MW), resulting in oversupply.
High renewable penetration in TAS1: 90.4%, TAS1, high_renewable, minor
Tasmania experienced a high renewable penetration event of 90.4% on 6 September 2026 at 07:00, driven predominantly by hydroelectric generation (1,926 MW across multiple units) with supplementary wind output (351 MW). Despite the high renewable share, regional prices escalated from $62.87/MWh to $88.49/MWh over a 25-minute period, indicating supply-side constraints.
Sustained negative pricing in QLD1: $-34/MWh for 3 intervals, QLD1, negative_price, moderate
QLD1 experienced sustained negative pricing across three settlement intervals on 6 September 2026 at 03:15–03:35, with prices reaching −$35/MWh, driven by high solar and wind generation (approximately 2,797 MW combined) during low-demand early morning periods. The negative pricing persisted across eight intervals in the sample, with minimal variation around −$34/MWh, indicating structural over-supply in the region.
High renewable penetration in SA1: 90.8%, SA1, high_renewable, minor
South Australia (SA1) experienced high renewable penetration of 90.85% during the 00:05–00:30 UTC period on 6 September 2026, driven predominantly by solar generation (359–373 MW) and wind (56 MW), with minimal thermal support. Despite the high renewable share, regional prices remained volatile, ranging from $9.10 to $42.02/MWh across five-minute intervals.