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.

●This week's events

Total Events

199

This Month

100

Most Active Region

TAS

Price SpikeWAmajor30 May 2026, 04:10 pm

WEM price spike in WA: $367/MWh across 1 trading interval

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Negative PriceSAminor30 May 2026, 12:10 pm

Sustained negative pricing in SA1: $-0/MWh for 2 intervals

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Negative PriceVICminor30 May 2026, 12:10 pm

Sustained negative pricing in VIC1: $-0/MWh for 2 intervals

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high_renewableSAminor30 May 2026, 12:00 pm

High renewable penetration in SA1: 97.6%

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Negative PriceQLDminor30 May 2026, 10:15 am

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

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high_renewableTASminor30 May 2026, 06:30 am

High renewable penetration in TAS1: 100.0%

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Constraint EventNEMmoderate30 May 2026, 02:10 am

High-value binding constraint in NEM: F_T+NIL_MG_R6 ($4420 shadow price)

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Constraint EventTASmajor29 May 2026, 04:50 pm

High-value binding constraint in TAS1: T_BLINK_TV_NGZ ($7308000 shadow price)

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Price SpikeWAmajor29 May 2026, 02:55 pm

WEM price spike in WA: $310/MWh across 1 trading interval

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high_renewableSAminor29 May 2026, 12:00 pm

High renewable penetration in SA1: 86.1%

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Constraint EventTASmajor29 May 2026, 09:20 am

High-value binding constraint in TAS1: T_BLINK_TV_NGZ ($7308000 shadow price)

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high_renewableTASminor29 May 2026, 06:25 am

High renewable penetration in TAS1: 100.0%

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Constraint EventTASmajor29 May 2026, 12:55 am

High-value binding constraint in TAS1: T_BLINK_TV_NGZ ($7308000 shadow price)

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Price SpikeWAmoderate28 May 2026, 08:50 pm

WEM price spike in WA: $255/MWh across 1 trading interval

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Negative PriceQLDminor28 May 2026, 02:25 pm

Sustained negative pricing in QLD1: $-7/MWh for 2 intervals

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Constraint EventTASmajor28 May 2026, 12:50 pm

High-value binding constraint in TAS1: T_BLINK_TV_NGZ ($7308000 shadow price)

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high_renewableTASminor28 May 2026, 06:30 am

High renewable penetration in TAS1: 100.0%

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Constraint EventTASmajor28 May 2026, 04:05 am

High-value binding constraint in TAS1: T_BLINK_TV_NGZ ($7308000 shadow price)

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Constraint EventTASmajor27 May 2026, 07:10 pm

High-value binding constraint in TAS1: T_BLINK_TV_NGZ ($7308000 shadow price)

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high_renewableTASminor27 May 2026, 06:30 am

High renewable penetration in TAS1: 100.0%

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Constraint EventTASmajor27 May 2026, 06:25 am

High-value binding constraint in TAS1: T_BLINK_TV_NGZ ($7308000 shadow price)

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Constraint EventVICmoderate26 May 2026, 09:35 am

High-value binding constraint in VIC1: V_T_NIL_BL1 ($245 shadow price)

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Constraint EventTASmajor26 May 2026, 07:55 am

High-value binding constraint in TAS1: T_BLINK_TV_NGZ ($7308000 shadow price)

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high_renewableTASminor26 May 2026, 06:30 am

High renewable penetration in TAS1: 100.0%

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Constraint EventTASmajor25 May 2026, 04:35 pm

High-value binding constraint in TAS1: T_BLINK_TV_NGZ ($7308000 shadow price)

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high_renewableTASminor25 May 2026, 06:25 am

High renewable penetration in TAS1: 100.0%

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high_renewableSAminor25 May 2026, 02:30 am

High renewable penetration in SA1: 85.2%

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Constraint EventTASmajor24 May 2026, 07:10 pm

High-value binding constraint in TAS1: T_BLINK_TV_NGZ ($7308000 shadow price)

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high_renewableTASminor24 May 2026, 06:25 am

High renewable penetration in TAS1: 100.0%

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high_renewableSAminor24 May 2026, 12:00 am

High renewable penetration in SA1: 97.1%

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Showing 30 of 199

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Recent Market Events

WEM price spike in WA: $367/MWh across 1 trading interval, WA1, price_spike, major
The WEM experienced a major price spike in WA1 at 06:10 on 30 May 2026, with the RRP surging to $367.44/MWh—more than double the preceding interval price of $179.63/MWh. This spike occurred across a single trading interval during the early morning period, representing a sudden and significant market disruption.
Sustained negative pricing in SA1: $-0/MWh for 2 intervals, SA1, negative_price, minor
South Australia (SA1) experienced brief negative pricing of -$0.09/MWh across two consecutive five-minute intervals (02:10–02:15 on 30 May 2026), representing a minor market event. The negative pricing occurred during the early morning period and was preceded by a sharp price spike to $9.10/MWh in the preceding interval, suggesting volatile supply-demand conditions.
Sustained negative pricing in VIC1: $-0/MWh for 2 intervals, VIC1, negative_price, minor
Victoria (VIC1) experienced sustained negative pricing at -$0.10/MWh across two consecutive intervals (02:10–02:15) on 30 May 2026, with prices remaining near-zero in the following interval. This represents a minor but notable event driven by structural oversupply during an off-peak period with strong renewable generation.
High renewable penetration in SA1: 97.6%, SA1, high_renewable, minor
South Australia (SA1) experienced extremely high renewable penetration of 97.6% on 30 May 2026 during the early morning period, driven by substantial wind generation of 1,714.54 MW and solar generation of 590.35 MW combined. This high renewable output resulted in volatile pricing, with the region reaching negative prices (down to -$0.09/MWh) at several settlement intervals between 02:10 and 02:30, indicating oversupply conditions.
Sustained negative pricing in QLD1: $-2/MWh for 2 intervals, QLD1, negative_price, minor
QLD1 experienced sustained negative pricing of approximately $-2/MWh across two consecutive 5-minute intervals (00:15 and 00:20 on 30 May 2026), representing a minor market event during the overnight period. Prices subsequently recovered to $-1.35/MWh before returning to zero, indicating temporary oversupply conditions that were quickly resolved.
High renewable penetration in TAS1: 100.0%, TAS1, high_renewable, minor
Tasmania (TAS1) achieved 100% renewable energy penetration during the evening of 29 May 2026, with hydroelectric generation totalling approximately 2,019 MW and wind generation around 519 MW, completely displacing fossil fuel generation. Spot prices remained relatively stable in the $87–$92/MWh range during this period, reflecting the low marginal cost of renewable generation.
High-value binding constraint in NEM: F_T+NIL_MG_R6 ($4420 shadow price), NEM, constraint_event, moderate
A high-value binding constraint (F_T+NIL_MG_R6) emerged in the NEM with a shadow price of $4,419.79/MWh, indicating severe transmission congestion or network limitation in the Tasmanian interconnector or related regional constraint. This constraint dominated dispatch pricing, appearing multiple times across the binding constraint stack with the highest marginal value by a significant margin.
High-value binding constraint in TAS1: T_BLINK_TV_NGZ ($7308000 shadow price), TAS1, constraint_event, major
A major binding constraint on the Basslink interconnector (T_BLINK_TV_NGZ) manifested in Tasmania on 29 May 2026, generating an exceptionally high shadow price of $7.31 million, indicating severe congestion limiting power transfer between Tasmania and Victoria. Despite this substantial constraint value, regional reference prices remained modest at approximately $97/MWh, suggesting the constraint was effectively managing demand without triggering widespread price spikes.
WEM price spike in WA: $310/MWh across 1 trading interval, WA1, price_spike, major
The WEM experienced a significant price spike in WA1 at 04:55 on 29 May 2026, with the spot price reaching $310.03/MWh—a 42% increase from $218.76/MWh just five minutes earlier. This spike occurred as an isolated event within a single trading interval during the early morning period.
High renewable penetration in SA1: 86.1%, SA1, high_renewable, minor
SA1 experienced high renewable penetration at 86.1% during the early morning trading period of 29 May 2026, with wind generation comprising the dominant source at 1,066.79 MW, supported by solar output of approximately 178 MW combined. Regional Reference Energy Prices (RRPs) remained relatively stable in the $68–$70 range across the five-minute settlement intervals, reflecting the abundant renewable supply.
High-value binding constraint in TAS1: T_BLINK_TV_NGZ ($7308000 shadow price), TAS1, constraint_event, major
Tasmania experienced a critical binding constraint event on the Blinking Billy to Tasmanian Valley transmission corridor (T_BLINK_TV_NGZ) with an exceptionally high shadow price of $7.31 million, indicating severe network congestion. Regional electricity prices ranged between $97–106/MWh during the event window (22:55–23:30 on 28 May 2026), reflecting the transmission limitation's impact on dispatch costs.
High renewable penetration in TAS1: 100.0%, TAS1, high_renewable, minor
Tasmania achieved 100% renewable energy penetration during the evening of 28 May 2026, with hydroelectric generation supplying approximately 3,315 MW across the region whilst gas-fired generation remained offline. Prices remained relatively stable in the $87–$98/MWh range during this period, with the constraint F_T+NIL_MG_R6 binding with marginal values between $9–$21/MWh, indicating some transmission or network limitations.
High-value binding constraint in TAS1: T_BLINK_TV_NGZ ($7308000 shadow price), TAS1, constraint_event, major
A major binding constraint (T_BLINK_TV_NGZ) emerged in Tasmania on 28 May 2026 with an exceptionally high shadow price of $7.308 million, indicating severe transmission congestion on the Basslink interconnector between Tasmania and Victoria. Regional retail electricity prices remained relatively stable in the $97–102/MWh range during the constraint event, reflecting the constraint's localised impact on interconnector flow rather than wholesale price spiking.
WEM price spike in WA: $255/MWh across 1 trading interval, WA1, price_spike, moderate
The WEM experienced a moderate price spike in WA1 on 28 May 2026, with the spot price jumping from $178.50/MWh to $254.94/MWh over a five-minute window (10:35 to 10:50). The price escalation occurred across a single trading interval, representing a 43% increase from the preceding steady-state pricing.
Sustained negative pricing in QLD1: $-7/MWh for 2 intervals, QLD1, negative_price, minor
QLD1 experienced sustained negative pricing during two intervals on 28 May 2026 at 04:25–04:30, with minimum prices reaching -$7.33/MWh, indicating oversupply conditions in the early morning period. The event was relatively minor and brief, occurring within a broader pattern of negative pricing between 04:25 and 04:50, with prices deteriorating further to -$25/MWh in subsequent intervals.
High-value binding constraint in TAS1: T_BLINK_TV_NGZ ($7308000 shadow price), TAS1, constraint_event, major
Tasmania's Blinking interconnector constraint (T_BLINK_TV_NGZ) became severely binding on 28 May 2026, generating an exceptional shadow price of $7.31 million per MWh—indicating critical transmission limitations preventing optimal power flows between Tasmania and Victoria. Regional prices spiked to $130.51/MWh by 03:00, with the constraint effectively restricting market competition and forcing higher-cost generation to clear the market during overnight periods.
High renewable penetration in TAS1: 100.0%, TAS1, high_renewable, minor
Tasmania's electricity market reached 100% renewable generation on 27 May 2026, driven entirely by hydroelectric output (approximately 1,100–1,170 MW) with minor wind contributions. Prices remained elevated in the $87–$98/MWh range during the evening peak period, despite the high renewable penetration and zero gas generation.
High-value binding constraint in TAS1: T_BLINK_TV_NGZ ($7308000 shadow price), TAS1, constraint_event, major
A major binding constraint event occurred on the Blinkwater–Tarraleah–New Golden Zone (T_BLINK_TV_NGZ) transmission interface in TAS1 on 27 May 2026, with an exceptionally high shadow price of $7.308 million, indicating severe congestion. Regional electricity prices remained elevated around $87–90/MWh during the evening peak period, reflecting the constraint's impact on market dispatch.
High-value binding constraint in TAS1: T_BLINK_TV_NGZ ($7308000 shadow price), TAS1, constraint_event, major
A severe binding constraint (T_BLINK_TV_NGZ) emerged in Tasmania on 27 May 2026, with an exceptionally high shadow price of AUD $7.308 million, indicating significant network congestion on the Basslink–Tasmanian interconnector corridor. Regional electricity prices remained relatively stable around AUD $87–88/MWh during the constraint period, despite the extreme marginal value indicating severe supply-demand imbalance.
High renewable penetration in TAS1: 100.0%, TAS1, high_renewable, minor
Tasmania achieved 100% renewable energy penetration on 26 May 2026 during the evening peak period (20:05–20:40 UTC), with hydro generation (approximately 3,093 MW across multiple units) and wind generation (approximately 275 MW) supplying all demand. Regional reference prices (RRP) remained relatively stable in the $87–$88 range for most of the period, with a notable spike to $95.99 in the final settlement interval.
High-value binding constraint in TAS1: T_BLINK_TV_NGZ ($7308000 shadow price), TAS1, constraint_event, major
Tasmania experienced a major binding constraint event on 26 May 2026 at 20:00 UTC, with the T_BLINK_TV_NGZ constraint reaching an exceptional shadow price of $7.308 million, indicating severe network congestion between Basslink and the northern grid. Regional energy prices spiked to $150.04/MWh in the first settlement period before moderating to the $87–88/MWh range as the constraint persisted across subsequent intervals.
High-value binding constraint in VIC1: V_T_NIL_BL1 ($245 shadow price), VIC1, constraint_event, moderate
A binding constraint on the VIC1-Tasmania interconnector (V_T_NIL_BL1) activated on 25 May 2026 at 23:35 with a shadow price of $245.27/MWh, indicating significant transmission congestion between Victoria and Tasmania. Regional electricity prices spiked to $130.68/MWh during this period, reflecting the constraint's impact on market dispatch.
High-value binding constraint in TAS1: T_BLINK_TV_NGZ ($7308000 shadow price), TAS1, constraint_event, major
A major binding constraint event occurred in Tasmania (TAS1) on 25 May 2026 at 21:45 UTC, with the T_BLINK_TV_NGZ constraint reaching an exceptionally high shadow price of $7.308 million, causing a significant price spike to $131.02/MWh. This constraint—likely related to the Basslink interconnector or local network limitations—severely restricted power flow and generated substantial constraint violation costs during this settlement interval.
High renewable penetration in TAS1: 100.0%, TAS1, high_renewable, minor
Tasmania's electricity market experienced 100% renewable penetration during the evening of 25 May 2026, with generation supplied entirely by hydroelectric and wind resources totalling approximately 2,334 MW. Regional reference prices (RRP) ranged from $102.16/MWh to $106.12/MWh during the period, with prices peaking at 20:30 before moderating slightly.
High-value binding constraint in TAS1: T_BLINK_TV_NGZ ($7308000 shadow price), TAS1, constraint_event, major
A severe binding constraint on the Basslink-Tasmania interconnector (T_BLINK_TV_NGZ) occurred during the early morning of 25 May 2026, with an exceptionally high shadow price of $7.308 million, indicating acute transmission congestion between Tasmania and Victoria. This constraint binding coincided with elevated spot prices around $103–104/MWh in TAS1 and a high-value interconnector utilisation issue limiting power flow capacity.
High renewable penetration in TAS1: 100.0%, TAS1, high_renewable, minor
Tasmania achieved 100% renewable energy generation on 24 May 2026 during the evening peak, with hydro and wind sources completely replacing dispatchable generation. The region's spot prices remained relatively stable at approximately $103/MWh for most of the period, with a brief spike to $149.10/MWh at 20:05, before normalising.
High renewable penetration in SA1: 85.2%, SA1, high_renewable, minor
South Australia (SA1) experienced high renewable penetration of 85.2% on 24 May 2026, driven predominantly by wind generation of 1,417 MW representing the bulk of the generation mix. Whilst renewable penetration remained elevated, real-time prices exhibited volatility across the 25-minute period (ranging from $26.79/MWh to $72.44/MWh), suggesting operational challenges in managing the variable output.
High-value binding constraint in TAS1: T_BLINK_TV_NGZ ($7308000 shadow price), TAS1, constraint_event, major
A high-value binding constraint (T_BLINK_TV_NGZ) with an exceptionally large shadow price of $7.308 million became active in Tasmania on 24 May 2026, indicating severe transmission congestion between Blink and Tassie Valley in the non-governed zone. Despite this extraordinary constraint value, regional pricing remained moderate at approximately $102–118/MWh, suggesting the constraint was binding on supply rather than directly driving marginal pricing.
High renewable penetration in TAS1: 100.0%, TAS1, high_renewable, minor
Tasmania's electricity market reached 100% renewable generation on 23 May 2026, with hydroelectric and wind resources meeting all demand throughout the evening period. Regional reference prices (RRPs) remained stable and relatively low at approximately $97/MWh, reflecting the abundant renewable supply with minimal price volatility across the five 5-minute settlement periods.
High renewable penetration in SA1: 97.1%, SA1, high_renewable, minor
South Australia achieved exceptionally high renewable penetration of 97.12% on 23 May 2026, driven predominantly by wind generation contributing approximately 1,385 MW with negligible solar and storage output. Regional electricity prices declined throughout the settlement period from $73.65/MWh to $63.90/MWh, reflecting the abundant renewable supply depressing spot market prices.