Parker 890GTR, Руководство по эксплуатации продукта

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Operations
4-2
890GTR Inverter Power Manual HA502996
Utility Interconnection and Grid Fault Interface
Normal Grid Operation
Energy is transmitted back and forth to the grid through power, reactive power, or power factor commands delivered to the inverter
via network communications or through discrete I/O. The 890GTR will attempt to meet the requested real power, reactive power or
power factor commands unless a system or device protection setting or algorithm prevents the inverter from achieving the desired
output. See table on page E-4 for environmental derating that may limit inverter output. In addition, parameters from the energy
storage supply like charge and discharge limits may override commanded system output. A full list of parameters can be found in
Appendix B.
Voltage Ride Through Behaviour
A graph of pre-programmed and allowable voltage ride through settings can be found in Appendix E and in the Version 5 Firmware
manual. In the event of a grid voltage fault, the inverter will respond in the following manner:
Faults within the programmed trip time and voltage limits:
The inverter will respond in 1 of 3 ways.
1) Symmetric 3 phase fault with the “ LVRT k” parameter in the Grid Control Function Block Menu set to 0: the inverter
will attempt to provide the pre-fault power and reactive power or power factor to within the current limits of the inverter.
In the event of excessive current required, the 890GTR will reduce reactive power and then real power to stay within
the current limits of the product.
2) Asymmetric fault: The inverter will remain synchronized to the grid but cease to export real power during the fault.
Reactive power from the internal capacitors will be present during the fault.
3) Symmetric 3 phase fault with the “ LVRT k” parameter in the Grid Control Function Block Menu set to 1 or higher: the
inverter will output additional reactive current in proportion to the magnitude of the fault scaled by the “LVRT k”
parameter and use any remaining output current capacity to achieve the pre-fault power output setpoint. For example:
a product rated for 1000A output on a grid is outputting 300A of real power current and 100A of inductive reactive
current and has its LVRT k parameter set to 1. If the grid experienced a symmetric 3 phase fault causing its voltage to
drop down to 50% of its nominal value the inverter will: add 1*(50%*1000A)=500A of capacitive reactive current to its