Woodward easYgen-3000XT Series, Руководство пользователя

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4.5.3.3.2 Reconnecting Mains Operating Range
Introduction
After mains decoupling from the power generation device, with under-/over frequency or
under-/over voltage, the automatic reconnection to the grid after the mains settling time
is only possible, if the mains is within the following operation ranges.
The operation ranges for mains reconnecting uses the voltages according to the
configured mains voltage monitoring (ID 1771 Mains voltage monitoring, phase-phase/
phase-neutral/All). Only if all considered voltages are back in band the synchronization to
mains will be executed.
ID Parameter CL Setting range
[Default]
Description
5818 Upper voltage limit 2 100 to 150%
[105%]
The maximum permissible
positive deviation of the mains
voltage from the mains rated
voltage after mains decoupling.
5819 Lower voltage limit 2 50 to 100%
[95%]
The maximum permissible
negative deviation of the mains
voltage from the mains rated
voltage after mains decoupling.
5821 Upper frequency limit 2 66.7 to 150.0%
[100.2%]
The maximum permissible
positive deviation of the mains
voltage from the mains rated
voltage after mains decoupling.
5822 Lower frequency limit 2 66.7 to 100.0%
[99.8%]
The maximum permissible
negative deviation of the mains
voltage from the mains rated
voltage after mains decoupling.
4.5.3.4 Mains Decoupling
General notes
The mains decoupling function is intended for use in a mains parallel operation and
monitors a series of subordinate mains protection thresholds. If a threshold is exceeded,
the genset control initiates a breaker opening and separates the generator(s) from the
mains at the defined breaker.
The following thresholds are monitored:
• Overfrequency level 2 ( ╚═▷ “4.5.1.3.2 Generator Overfrequency (Level 1 & 2) ANSI# •
81O” )
• Underfrequency level 2 ( ╚═▷ “4.5.3.6 Mains Underfrequency (Level 1 & 2) ANSI# •
81U” )
• Overvoltage level 2 ( ╚═▷ “4.5.1.2.1 Generator Overvoltage (Level 1 & 2) ANSI# 59” ) •
• Undervoltage level 2 ( ╚═▷ “4.5.1.2.2 Generator Undervoltage (Level 1 & 2) ANSI# •
27” )
• Mains phase shift / df/dt (ROCOF) ( ╚═▷ “4.5.3.12 Change Of Frequency” ) •
489 easYgen-3000XT Series B37574
4 Configuration
4.5.3.3.2 Reconnecting Mains Operating Range
Released