Power Export To Mains - Datakom D-500 MK2 User Manual

D-500 MK2 User Manual

31.2. POWER EXPORT TO MAINS

GENSET
The Export to Mains mode allows the multi genset system to supply the mains power grid under
constant power factor. Thus the multi genset system will be part of the mains power supply system.
The Export to Mains mode is activated by setting the program parameter Power Export Enable. This
operating mode is not compatible with Peak Lopping. Thus Peak Lopping Enable parameter must be 0.
When Export to Mains is enabled, the mains voltages and frequency are within limits and the D700 in
AUTO mode, the unit will run the genset system, synchronize with mains and close the Load Contactor.
Then the output active power of the genset system will ramp-up at the rate defined in program parameter
Active Power Ramp. The reactive power is continuously adjusted in order to hold the power factor
constant (defined in Exported Power Factor).
When the requested output power is reached, the ramping will be terminated. The requested power is
defined by Exported Power program parameter.
The G59 protections for mains failure in parallel are active during the Export to Mains operation, with the
exception of Mains Reverse Power protection. If a mains failure is detected during paralleling, then the
mains contactor will open, and the D700 will continue to feed the local load. When the mains is restored,
then the genset system will resume Export to Mains operation.
The Export to Mains operation is compatible with the Weekly Operating Schedule. Thus the genset can
be programmed for supplying the mains only during given time intervals.
The power export mode may be disabled momentarily with an external signal. In order to achieve this, a
digital input should be programmed as Disable Power Export function input. More information about
input programming is found in the PROGRAMMING chapter.
LOAD
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Firmware V-6.3
MAINS