[FOR FACILITIES WITH STORAGE] Alternate Active Power/ Frequency Response Modes. The Facility will provide the capability to supply isochronous or fast frequency response modes of operation, in addition to normal droop, which can be set remotely or locally. The control design shall allow for a bumpless transfer between modes of operation. Fast Frequency Response (FFR): This mode of operation will permit the Facility to respond to system frequency disturbances with a fast charge/discharge response in accordance with the frequency response droop settings. In this mode of operation, the Facility frequency response is configured to provide fast frequency response, as an alternative setting to the typical steady-state frequency response. When in this mode of operation, the frequency droop characteristics are configured to charge or discharge with a different set of parameters to allow for a faster and larger proportional charge and discharge in response to frequency changes outside of the configurable deadband. The initial parameter settings will be specified by Company following the IRS and additional tuning and adjustment of configurable parameters may be required based on review of response to actual system events. When in FFR mode, when system frequency is within the fast frequency response deadband, the Facility will operate to maintain a percentage state of charge, which is configurable on Company request (i.e., 50%) managed at a charging/discharging rate, also specified by Company. Isochronous / Black Start: The Facility will be capable of operating in a zero droop (isochronous) mode of operation. When in this mode of operation, the frequency droop characteristic will be configured as needed to keep system frequency at a target. In a black start configuration, the target shall be 60 Hz. If isochronous is specified while in operation, the target shall be initialized to the grid frequency and the target increased or decreased from the Company System through the control interface.
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Samples: Energy Storage Power Purchase Agreement, Energy Storage Power Purchase Agreement
[FOR FACILITIES WITH STORAGE] Alternate Active Power/ Frequency Response Modes. The Facility will provide the capability to supply isochronous or fast frequency response modes of operation, in addition to normal droop, which can be set remotely or locally. The control design shall allow for a bumpless transfer between modes of operation. Fast Frequency Response (FFR): This mode of operation will permit the Facility to respond to system frequency disturbances with a fast charge/discharge response in accordance with the frequency response droop settings. In this mode of operation, the Facility frequency response is configured to provide fast frequency response, as an alternative setting to the typical normal steady-state frequency response. When in this mode of operation, the frequency droop characteristics are configured to charge or discharge with a different set of parameters to allow for a faster and larger proportional charge and discharge in response to frequency changes outside of the configurable deadband. The initial parameter settings will be specified by Company following the IRS and additional tuning and adjustment of configurable parameters may be required based on review of response to actual system events. When in FFR mode, when system frequency is within the fast frequency response deadband, the Facility will operate to maintain a percentage state of charge, which is configurable on Company request (i.e., 50%) managed at a charging/discharging rate, also specified by Company. Isochronous / Black Start: The Facility will be capable of operating in a zero droop (isochronous) mode of operation. When in this mode of operation, the frequency droop characteristic will be configured as needed to keep system frequency at a target. In a black start configuration, the target shall be 60 Hz. If isochronous is specified while in operation, the target shall be initialized to the grid frequency and the target increased or decreased from the Company System through the control interface.
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[FOR FACILITIES WITH STORAGE] Alternate Active Power/ Frequency Response Modes. The Facility will provide the capability to supply isochronous or fast frequency response modes of operation, in addition to normal droop, which can be set remotely or locally. The control design shall allow for a bumpless transfer between modes of operation. Fast Frequency Response (FFR): This mode of operation will permit the Facility to respond to system frequency disturbances with a fast charge/discharge response in accordance with the fast frequency response droop settings. In this mode of operation, the Facility frequency response is configured to provide fast frequency response, as an alternative setting to the typical normal steady-state frequency response. When in this mode of operation, the frequency droop characteristics are configured to charge or discharge with a different set of parameters to allow for a faster and larger proportional charge and discharge in response to frequency changes outside of the configurable deadband. The initial parameter settings will be specified by Company following the IRS and additional tuning and adjustment of configurable parameters may be required based on review of response to actual system events. When in FFR mode, when system frequency is within the fast frequency response deadband, the Facility will operate to maintain a percentage state of charge, which is configurable on Company request (i.e., 50%) managed at a charging/discharging rate, also specified by Company. Isochronous / Black Start: When in FFR mode the active power-frequency control system shall have an adjustable FFR proportional droop characteristic with a default value of [1%] percent. The Facility will FFR droop setting shall permit a setting from 0.1% to 5%. This setting shall be capable changed upon Company’s written request as necessary for fast frequency response coordination. The FFR droop shall be a permanent value based on Pmax (maximum nominal active power output of operating in a zero the plant) and Pmin (typically 0 for an inverter-based resource). This keeps the proportional droop (isochronous) mode constant across the full range of operation. When The curve for an inverter-based XXXX may include the negative active power quadrant of this curve. The droop response must include the capability to respond in this mode of operation, both the frequency upward (underfrequency) and downward (overfrequency) directions. Frequency droop characteristic will be configured as needed to keep system frequency at based on the difference between maximum nameplate active power output (Pmax) and zero output (Pmin) such that the [1%] percent droop line is always constant for a target. In a black start configuration, the target shall be 60 Hz. If isochronous is specified while in operation, the target shall be initialized to the grid frequency and the target increased or decreased from the Company System through the control interfaceresource.
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