Dynamic Active Power-Frequency Performance Clause Samples

The Dynamic Active Power-Frequency Performance clause defines the requirements for how a power-generating facility must respond to changes in grid frequency by adjusting its active power output. In practice, this clause sets out the technical parameters and response times for the facility to either increase or decrease its power generation in response to frequency deviations, ensuring grid stability. Its core function is to maintain the reliability and balance of the electrical grid by mandating that generators actively support frequency regulation during dynamic events.
Dynamic Active Power-Frequency Performance. For a step change in frequency at the point of measure of the inverter-based resource [NOTE - MAY BE ADJUSTED AS THE RESULT OF IRS]: Reaction time: The time between a step change in frequency and the time when the resource active power output begins responding to the change shall be less than 500 Ms, or as otherwise specified by Company.* Rise time: The time when the resource has reached 90% of the new steady-state (target) active power output shall be less than 4 seconds, or as otherwise specified by Company.† Settling Time: Time in which the resource has entered into, and remains within, the settling band of the new steady-state active power (target) output shall be less than 10 seconds, or as otherwise specified by Company. Overshoot: Percentage of the rated active power output that the resource can exceed while reaching the settling band shall be less than 5% or as otherwise specified by Company.‡ Settling Band: Percentage of rated active power output that the resource should settle to within the settling time shall be less than 2.5%. When operating in parallel with the Company System, the Facility shall operate with its primary frequency response control in automatic operation and in accordance with Company directions. Notification of changes in the status of the frequency response controls and, where applicable, mode of operation must be provided to the Company System Operator immediately through SCADA telemetry indication. The Facility frequency response control shall adjust, without intentional delay and without regard to the ramp rate limits in Section 3(c) (Ramp Rates) of this Attachment B (Facility Owned by Seller), the Facility's net real power export based on frequency deadband and frequency droop settings specified by the Company. The Facility frequency response control shall increase the net real power export above the Power Reference Setpoint set under Section 1(g)(viii) of this Attachment B (Facility Owned by Seller) or further decrease the net real power export from the Power Reference Limit in its operations in accordance with the frequency response settings. The Facility frequency response control shall be in continuous operation unless directed otherwise by the Company.
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Dynamic Active Power-Frequency Performance. For a step change in frequency at the point of measure [NOTE - MAY BE ADJUSTED AS THE RESULT OF IRS]: The Facility frequency response control shall adjust, without intentional delay and without regard to the ramp rate limits in Section 3(c) (Ramp Rates) of this Attachment B (Facility Owned by Seller), the Facility's net real power export based on frequency deadband and frequency droop settings specified by the Company. The Facility frequency response control shall increase the net real power export above the Real Power Setpoint set under Section 1(g)(viii) of this Attachment B (Facility Owned by Seller) or further decrease the net real power export from the Power Reference Limit in its operations in accordance with the frequency response settings. The Facility frequency response control shall be in continuous operation unless directed otherwise by the Company.
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Dynamic Active Power-Frequency Performance. For a step change in frequency at the point of measure of the inverter-based resource [NOTE - MAY BE ADJUSTED AS THE RESULT OF IRS]: Reaction time: The time between a step change in frequency and the time when the resource active power output begins responding to the change shall be less than 500 Ms, or as otherwise specified by Company. 1 Rise time: The time when the resource has reached 90% of the new steady-state (target) active power output shall be less than 4 seconds, or as otherwise specified by Company.2 Settling Time: Time in which the resource has entered into, and remains within, the settling band of the new steady-state active power (target) output shall be less than 10 seconds, or as otherwise specified by Company. Overshoot: Percentage of the rated active power output that the resource can exceed while reaching the settling band shall be less than 5% or as otherwise specified by Company.3 Settling Band: Percentage of rated active power output that the resource should settle to within the settling time shall be less than 2.5%. When operating in parallel with the Company System, the Facility shall operate with its primary frequency response control in automatic operation and in accordance with Company directions. Notification of changes in the status of the frequency response controls and, where applicable, mode of operation must be provided to the Company System Operator immediately through SCADA telemetry indication. 1 Time between step change in frequency and the time to 10 percent of new steady-state value can be used as a proxy for determining this time.
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