Woodward easYgen-2000 Series User Manual page 298

Configuration
Configure Application > Configure Controller > Load Share Control
4.5.12.7.3 Re-synchronization Of The Busbar To The Mains
Example
4.5.12.7.4 Prerequisites
298
The parameter "Active power Load share factor" (param‐
eter 5530 Ä p. 301) can be used to define the priority of the refer‐
ence variable for real power sharing. A higher configured per‐
centage influences the control more towards frequency control. A
lower configured percentage influences the control more towards
real power sharing.
The parameter "React. power Load share factor" (param‐
eter 5630 Ä p. 302) can be used now to define the priority of the
reference variable for reactive power sharing. A higher configured
percentage influences the control more towards voltage control. A
lower configured percentage influences the control more towards
reactive power sharing.
The system is operating as an isolated system, for synchronization
to be performed the voltage and frequency differentials of the
mains and bus must be within the configured windows.
The bus frequency reference point is dictated by the measured
mains frequency and the configured frequency differential (+ slip
frequency setpoint offset (parameter
If + slip frequency setpoint offset = 0.2 Hz, the easYgen will calcu‐
late the bus frequency reference point as:
[measured mains frequency] + [slip frequency setpoint
n
offset] = bus frequency reference point
A practical example of this would be:
The monitored mains frequency is 60 Hz
n
Configured + slip frequency setpoint offset = 0.2 Hz
n
[60 Hz] + [0.2Hz] = 60.2 Hz bus frequency reference point
n
The differential voltage is configured as a window. The monitored
voltage from the potential transformers secondary for the mains
and the bus must be within the configured voltage differential limit
in relation to the rated voltage configuration.
This means that the voltage window dV [%] is in relation to the
rated voltage configuration [%].
When the monitored bus frequency and voltage are within the con‐
figured differential limits, the "Command: close MCB" relay will
enable, closing the MCB, and the system will be paralleled to the
mains.
All easYgen controllers connected to the system must have rated
system frequencies and breaker logic configured identically and
the parameter "Active power load share" (param‐
eter 5531 Ä p. 301) or "Reactive power load share" (param‐
eter 5631 Ä p. 301) must be enabled.
easYgen-2200/2500 | Genset Control
5502 Ä p. 276).
37535B