6. Regulation
6.1 Introduction
6.1.1 Overview
The GENSET and EMERGENCY genset controllers can use analogue and/or relay control functions for regulation.
While the controller is under PMS control, the controller sets the regulation mode according to the system conditions.
If you have a GAM3.2 module installed, then the controller also has a stand alone regulation mode for both governor and AVR.
When the controller is under
Switchboard control
, or when certain alarm conditions are active, regulation must be done manually.
More information
See
System principles
,
Control and modes
,
Switchboard control
for more information about how to control the
regulators manually through the controller.
INFO
All the input and output information in this chapter is written from the DEIF controller point of view, except if clearly stated
otherwise.
Overview of analogue control and relay control
Analogue control generally achieves finer control results than relay control. Analogue control also allows the controller to use a pulse
width modulation (PWM) output, for governors and automatic voltage regulators that support this as an input (as opposed to an
analogue input to the governor or AVR). DEIF recommends that you use the full capability of analogue control in situations which
require precision, such as static synchronisation.
Relay control is not able to produce the same precision as a well-tuned analogue controller. However, setting up relay control is
simpler. To extend the life of relays, the controller has a range around the set point where the controller does not send regulation
signals to the governor or automatic voltage regulator when using relay control. This range is called the regulation deadband.
Analogue regulation does not have a deadband area, which contributes to more accurate regulation of the governor or AVR.
6.1.2 Analogue regulation
For regulation, an analogue output is a continuous signal.
Configuring analogue outputs
Assign the analogue output regulation function(s) under
Configure > Input/output
.
Set
Configure > Parameters > Regulators > [Regulator] general configuration > Regulator output > Output type
to
Analogue
(where
[Regulator]
is
Governor
or
AVR
).
Configuring pulse width modulation
Some governors require a pulse width modulation (PWM) input. The controller converts the analogue output to a PWM signal for the
PWM terminals.
Connect the governor to the controller's PWM terminals.
Assign the
Regulators > GOV > GOV output [%]
function to the PWM terminals under
Configure > Input/output
.
More information
See
Hardware characteristics and configuration, Governor and AVR module GAM 3.1, Pulse width modulation
(PWM) output characteristics
for more information about the relationship between duty cycles and the PWM output.
DESIGNER'S HANDBOOK 4189340911K UK
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