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Constraint Breakdown 2017-2018

Table Information

Date

Title Date
Type date
Description The date of the costs/volumes.
Comment
Example 2021-04-04
Unit ISO 8601

Reducing largest loss cost

Title Reducing largest loss cost
Type number
Description At times of low inertia we must take more actions to keep the potential RoCoF below trigger points. We limit RoCoF by limiting the largest credible loss. Trading or taking BM Actions can reduce the level of the generation or demand that comprises the largest loss. eg. reducing generation output in one area whilst increasing generation output elsewhere. Or reducing demand or export on an interconnector and reducing generation output to balance. Reducing the potential largest loss on the system reduces the RoCoF on the system that would ocur in the event of that loss. The costs of these Trading and BM Actions are shown here.
Comment
Example 2128995
Unit £

Increasing system inertia cost

Title Increasing system inertia cost
Type number
Description Increasing the level of inertia on the system can also reduce RoCoF. Taking BM Actions to increase synchronous generation can increase inertia. The costs of these BM Actions are shown here.
Comment
Example 9195
Unit £

Voltage constraints cost

Title Voltage constraints cost
Type number
Description Reactive power needs to be kept in balance to keep the voltage at the right level. Voltage requirements can vary from one region to another. Trades and BM Actions can support Voltage Control. The costs of these actions are shown here.
Comment
Example 120288
Unit £

Thermal constraints cost

Title Thermal constraints cost
Type number
Description Thermal constraints are taken when the amount of energy that would flow naturally from one region to another exceeds the capacity of the circuits connecting the two regions. Thermal constraints can be managed by Trades or BM Actions. The costs of these actions are shown here.
Comment
Example 2132332
Unit £

Reducing largest loss volume

Title Reducing largest loss volume
Type number
Description At times of low inertia we must take more actions to keep the potential RoCoF below trigger points. We limit RoCoF by limiting the largest credible loss. Trading or taking BM Actions can reduce the level of the generation or demand that comprises the largest loss. eg. reducing generation output in one area whilst increasing generation output elsewhere. Or reducing demand or export on an interconnector and reducing generation output to balance. Reducing the potential largest loss on the system reduces the RoCoF on the system that would ocur in the event of that loss. The volumes of these Trading and BM Actions are shown here.
Comment
Example -47450
Unit MWh

Increasing system inertia volume

Title Increasing system inertia volume
Type number
Description Increasing the level of inertia on the system can also reduce RoCoF. Taking BM Actions to increase synchronous generation can increase inertia. The volumes of these BM Actions are shown here.
Comment
Example 2047
Unit MWh

Voltage constraints volume

Title Voltage constraints volume
Type number
Description Reactive power needs to be kept in balance to keep the voltage at the right level. Voltage requirements can vary from one region to another. Trades and BM Actions can support Voltage Control. The volumes of these actions are shown here.
Comment
Example 17140
Unit MWh

Thermal constraints volume

Title Thermal constraints volume
Type number
Description Thermal constraints are taken when the amount of energy that would flow naturally from one region to another exceeds the capacity of the circuits connecting the two regions. Thermal constraints can be managed by Trades or BM Actions. The volumes of these actions are shown here.
Comment
Example 16436
Unit MWh