Sungrow SH5K - Demand Response and Reactive Power Regulation

User Manual 3 Function Description
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3.2.2 External Demand Response
The inverter provides a terminal block for connecting to a demand response
enabling device (DRED). The DRED asserts demand response modes (DRMs). The
inverter detects and initiates a response to all supported demand response
commands within 2s. For the connections, see “12.1 Demand Response Modes”.
The following table lists the DRMs supported by the inverter.
Tab. 3-1 Demand Response Modes (DRMs)
Mode Explanation
DRM0 The inverter is in the state of “Key-stop”.
DRM1 The import power from the grid is 0.
DRM2 The import power from the grid is no more than 50 % of the rated power.
DRM3 The import power from the grid is no more than 75 % of the rated power.
DRM4
The import power from the grid is 100 % of the rated power, but subject to
the constraints from other active DRMs.
DRM5 The export power to the grid is 0.
DRM6 The export power to the grid is no more than 50 % of the rated power.
DRM7 The export power to the grid is no more than 75 % of the rated power.
DRM8
The export power to the grid is 100 % of the rated power, but subject to the
constraints from other active DRMs.
The DRED may assert more than one DRM at a time. The following shows the priority
order in response to multiple DRMs.
Multiple Modes Priority Order
DRM1…DRM4 DRM1 > DRM2 > DRM3 > DRM4
DRM5…DRM8 DRM5 > DRM6 > DRM7 > DRM8
3.2.3 Reactive Power Regulation
The inverter is capable of operating in reactive power regulation modes for the
purpose of providing support to the grid. These various operating modes can be
enabled or disabled via the LCD menu. For details, see “12.2 Reactive Power
Regulation”.
y
PF: Fixed power factor mode.
y
Qt: Fixed reactive power mode.
y
Q(p): The PF of the inverter output varies in response to the output power of the
inverter.
y
Q(u): The reactive power output of the inverter varies in response to the grid
voltage.