Solar Lattice

Measurement

Reactive power mode event log

ID
meas:reactive-power-mode-event-log
IRI
https://solarlattice.org/kb/meas/reactive-power-mode-event-log
Status
active
Also known as
Reactive Power Regulation Control

This signature is a record that the inverter's reactive power mode was set or changed. The mode is found under System and device control, then Inverter, then Reactive power mode. Separate mode parameters exist for active power output, for active power draw and for zero active power, so check which of these entries changed. Available modes include Off, a fixed Q setting and a cos phi setpoint. Note that the cos phi setpoint mode does not apply at zero active power. Other inverters offer PF mode, constant reactive power mode, PFP mode, Q(U) curve mode and Q(P) curve mode, and each has its own parameters. A mode switch can be expected when the setpoint goes missing, for example when communication with the superordinate control unit fails. In that case the grid operator can require a specified fallback reactive power mode. Which reactive power feed modes are used depends on the country or state of installation and on the grid company. Compare a logged change against the required grid settings. To confirm what the inverter actually did after the change, compare the reactive AC power output measurement in volt-amperes reactive.

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