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Unlike FCAS bids, Spot Traders will continue to manually submit energy bids to optimise the value of Alinta’s your energy portfolio. The last manually submitted bid is termed the reference bid. Under certain conditions the Solver may adjust volume within the reference bid by a limited amount. This amount is called the Trader delta Limit Volume, TdelLV. The following definitions and constraints apply to the calculation:
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Note that volume is taken from the first PB(s) that meets the condition of PBx >= FRRP if delOV > 0 (or conversely volume is taken from the first PB(s) that meets the condition PBx <= FRRP if delOV < 0) .
Suggested Trader Parameters
The following inputs would achieve comparable bid patterns as described and provided by Alinta.
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Input
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Acronym
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L5m
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L60s
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L6s
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Lreg
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R5m
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R60s
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R6s
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Rreg
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ENERGY
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MaxCapacity (as bid)
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MAV
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80
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136
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14
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75
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81
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131
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13
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75
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550/600
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Trader Limit Volume and Trader delta Limit Volume (MW)
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TLV and TdelLV
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40
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40
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null
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35
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35
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60
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null
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35
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20
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)
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TP1
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0.4
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0.5
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null
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6
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0.5
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.
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null
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7
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n/a
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TraderPrice2 ($/MW)
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TP2
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5
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5
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null
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18
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5
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10
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null
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20
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n/a
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TraderPrice3 ($/MW)
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TP3
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12000
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12000
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null
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12000
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12000
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12000
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null
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12000
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Glossary
Term | Acronym | |
|---|---|---|
BreakEvenRRP | BERRP | a calculated RRP where the service is marginal based on FRRP of other services. Note that the BERRP may be greater or less than FRRP. |
CurrentVolume | CV | is the expected energy target based on the reference bid and FRRP. This is required since Energy optimisation is limited by the reference bid. |
DiscretionaryVolume | DV | = Min(MAV, LV) for each FCAS This variable is an input into the Solver |
ForecastRRP | FRRP | is the forecast RRP of the service. Initially this will be the latest p5min forecast. |
Max Avail Volume | MAV | is the maxavail as bid for each FCAS. Note that the word Volume has been appended to the definition for consistency with other volume definitions. |
Maximum Discretionary Volume | maxDV | is the maximum energy volume that the Solver may determine as optimal. |
Minimum Discretionary Volume | minDV | is the minimum energy volume that the Solver may determine as optimal. |
NonDiscretionaryVolume | NDV | = MAV - DV Note that this variable is not an input into the Solver. |
NonOptimalVolume | NOV | = DV - OV |
OptimalVolume | OV | is an output of the Solver and is the optimal volume of each FCAS to be dispatched. |
ReferenceBid | the last manual energy bid submitted to AEMO for a given day. | |
Trader Delta Limit Volume | TdelLV | is a user inserted value that limits the volume that may be repriced from an energy reference bid. |
Trader Limit Volume | TLV | is a user inserted value that aims to limit the Discretionary Volume consumed by the Solver for each FCAS. |
TraderPrice1 | TP1 | is an optional user inserted value that limits the minimum price of a Priceband when applied to the allocation of OV. |
TraderPrice2 | TP2 | is an optional user inserted value that limits the minimum price of a Priceband when applied to the allocation of NDV. |
TraderPrice3 | TP3 | is an optional user inserted value that limits the maximum price when applied to allocation of NDV. Generally this is used to avoid allocating volume to PB10. |
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