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Ramp rate limiter (without HEMS)
Description
To avoid rapid changes in the active power and reactive power output, the "Ramp rate limiter" option allows the power generating system to follow a defined gradient to increase or decrease the active power output after receiving a new setpoint from the grid operator/third party.
Functions
The option ramp rate limiter is available for active and reactive power control. The ramp rate limiter is applied to the grid operator / third-party setpoint. The following options are available:
Active power
Ramp up | The gradient configured for ramp up only applies to the new setpoint from the grid operator / third party if it's increasing the active power output. |
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Ramp up/Ramp down | Ramp-up / Ramp-down" allows you to define separate gradients ("Gradient (ramp-up)" and "Gradient (ramp-down)") for increasing and reducing the active power output. |
Soft start | A soft start gradient will be used if the active power at the point of common coupling is ≤ 0 W. The gradient is valid until the new setpoint is reached. Example: Active power is 0 W and the setpoint is 0 % => Setpoint changes from 0 % to 100 % => Soft start is active until setpoint of 100 % is reached. ( e.g. for Ramp rate 1%/s = for 100 s gradient of "Soft start" is active) |
Activation | The ramp rate limiter can be activated via the user interface or via a Modbus command. |
Configuration of ramp rates | The ramp rate can be configured via the user interface or via a Modbus command. |
Reactive power
Ramp up | The gradient configured for the ramp rate applies to the new setpoint from the grid operator. |
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Activation | The ramp rate limiter can only be activated via the user interface. |
Configuration of ramp rates | The ramp rates can only be configured via the user interface. |
User interface
Ramp rate limiter for active power
Ramp rate limiter for active power
Ramp rate limiter for reactive power
Examples
Setpoint grid operator input signal | Output signal | |
|---|---|---|
Ramp rate limiter off |  |  |
Ramp up | .png?inst-v=2289eba8-badf-4303-8989-60e767d637fd) | .png?inst-v=2289eba8-badf-4303-8989-60e767d637fd) |
Ramp up/ramp down | .png?inst-v=2289eba8-badf-4303-8989-60e767d637fd) |  |
Soft start | .png?inst-v=2289eba8-badf-4303-8989-60e767d637fd)  |  |