Discrete Raise/Low/Function - Woodward easYgen-2000 Series User Manual

Configuration
Configure Application > Configure Controller > Discrete Raise/Low/Function
Function Droop Tracking
Droop Tracking On/Off
Load sharing in Droop mode On/Off
ID Parameter
5747 Droop tracking
5748 Load sharing in droop
mode
Table 57: Droop related parameters
4.5.12.8

Discrete Raise/Low/Function

General notes
306
The droop tracking for frequency/voltage control is implemented
such that when the control is switched to frequency/voltage control
with droop the frequency/voltage real value does not change at the
current active/reactive load. This is provided by pre-calculating a
setpoint offset, which is needed to hold rated frequency/voltage at
present load.
This is a feature in applications where for example the load sharing
over communication interface gets lost and the number of genera‐
tors remains the same.
The easYgen allows disabling the droop tracking for frequency and
voltage generally. This makes sense in applications where the
number of generators can vary during running in droop mode.
Multiple easYgens are load sharing under each other, if they run
isolated from mains or they control export/import power at a
common interchange point. For dynamic reasons it makes sense to
disable the load sharing, when the easYgens running in droop or
can fall into droop mode (Missing member case).
CL
2
The frequency / load and voltage / reactive power setpoints may be
raised and lowered using the LogicsManager functionality, i.e. it is
possible to use LogicsManager command variables to raise and
lower these setpoints. Most commonly a button may be used to
energize a discrete input on the control, which is used again as a
LogicsManager command variable to enable the respective Logi‐
csManager function to change the setpoint.
The discrete raise/lower function always uses the actual value at
the time when this function is enabled for the respective controller
setpoint as initial value. If the actual value is negative at this point
in time, the initial value is zero.
easYgen-2200/2500 | Genset Control
Setting Range Description
[Default]
[On] The frequency and
voltage setpoint offset is
pre-calculated to hold
the frequency and
voltage, when control is
switched into droop.
Off The setpoint offset is
always zero.
[On] As long the load sharing
function is enabled, it is
done in droop mode too.
Off The load sharing is gen‐
erally disabled in droop
mode.
37535B