Basler DECS-100, Инструкция по эксплуатации

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DECS-100 Functional Description 3-4
DECS-100 OPERATING FEATURES
The following paragraphs describe the characteristics of each DECS-100 operating feature.
Operating Modes
The DECS-100 provides up to four modes of operation selectable through BESTCOMS software. Automatic
voltage regulation mode and Manual mode are standard features. Var and Power Factor modes are an
option.
Automatic Voltage Regulation Mode
In Automatic Voltage Regulation (AVR) mode, the DECS-100 regulates rms generator output voltage. This
is accomplished by sensing generator output voltage and adjusting dc output excitation current to maintain
voltage at the regulation setpoint. The regulation setpoint is adjusted by the Raise and Lower contact inputs,
the Accessory input, or through BESTCOMS software. The regulation point may also be modified by the
Droop function or the Underfrequency function under certain conditions.
Manual Mode
In Manual mode, also known as Field Current Regulation (FCR) mode, the DECS-100 maintains dc excitation
current at a set level. The current-level setpoint is adjustable from 0 to 7 Adc in 0.1 Adc increments by the
Raise and Lower contact inputs, the optional Accessory input, or through BESTCOMS software.
Var Control Mode (Optional)
In Var Control mode, the DECS-100 maintains generator vars (volt-amperes, reactive) at a set level when
paralleling with an infinite bus. The DECS-100 calculates generator vars by using the sensed generator
output voltage and current quantities. It then adjusts the dc excitation current to maintain vars at the setpoint.
Var control is enabled and disabled through BESTCOMS software. When the software is turned on, var
control is enabled or disabled through the Var/Power Factor Control (52J/K) contact input circuit. The var
setpoint is adjustable from 100 percent absorb to 100 percent generate through the Raise and Lower contact
inputs, the optional Accessory input, or through BESTCOMS software.
Power Factor Control Mode (Optional)
In Power Factor Control mode, the DECS-100 maintains generator power factor at a set level when
paralleling with an infinite bus. The DECS-100 calculates generator power factor using the sensed generator
output voltage and current quantities and then adjusts the dc excitation current to maintain power factor at
the setpoint. Power factor control is enabled or disabled through BESTCOMS software. When the software
is turned on, it is enabled or disabled through the Var/Power Factor Control (52J/K) contact input circuit. The
power factor setpoint is adjustable between 0.6 lag and 0.6 lead through the Raise and Lower contact inputs,
the optional Accessory input, or through BESTCOMS software.
Reactive Droop Compensation
The DECS-100 provides a reactive droop compensation feature to assist in the sharing of reactive load during
parallel generator operation. When this feature is enabled, the DECS-100 calculates the reactive portion of
the generator load using the sensed generator output voltage and current quantities and then modifies the
voltage regulation setpoint accordingly. A unity power factor generator load results in almost no change in
generator output voltage. A lagging power factor generator load (inductive) results in a reduction of generator
output voltage. A leading power factor generator load (capacitive) results in an increase of generator output
voltage. Droop is adjustable up to 10 percent with rated, nominal B-phase line current (1 ampere or 5
amperes applied through terminals CT1 and CT2) and 0.8 power factor. The droop feature is enabled and
disabled through the Parallel Generator Compensation contact input circuit (terminals 52L and 52M). Droop
is also disabled when operating in var or power factor control modes.
CAUTION
The Manual mode excitation level must be evaluated prior to enabling this
feature. If the level of excitation current is inappropriate for the generator,
severe damage to the generator may occur.