Reactive Power Regulation; Power Quality Response - Sungrow SG2K5-S User Manual

2 Product Introduction

2.4.3 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.

PF: Fixed power factor mode.

Qt: Fixed reactive power mode.

Q(p): The PF of the inverter output varies in response to the output power of
the inverter.

Q(u): The reactive power output of the inverter varies in response to the grid
voltage.

2.4.4 Power Quality Response

The inverter supports two power quality response modes.

Power response for voltage variations
Define the response curve with four reference voltages, which can be set via
the LCD menu. The power output will vary in response to the voltage curve.
Refer to "7.5.2 Setting Protective Parameters" for details.

Power response for frequency variations
The inverter provides built-in over/under frequency protective threshold values.
Refer to "Tab. 7-7 Protective Parameters of Grid Standards" for details.
When the grid frequency is lower than the under-frequency limit or higher than
the over-frequency limit, the inverter will be disconnected from the grid.
When there is an increase in grid frequency which exceeds 50.25 Hz, the
inverter will reduce the power output linearly with an increase of frequency until
the end value (52.00 Hz) is reached.
10
User Manual