GE Multilin
N60 Network Stability and Synchrophasor Measurement System
5-111
5 SETTINGS
5.4 FLEXLOGIC™
5
The summator performs the following operation:
(EQ 5.8)
where:
X
represents the programmed input of summator
N
(determined by the
SUMMATOR N INPUT1(6)
settings);
S
represents the programmed scale of summator
N
(determined by the
SUMMATOR N SCALE 1(6)
settings);
P
represents the programmed position of summator
N
(determined by the
SUMMATOR N POS1(6)
settings).
The resulting
Y
value can be set as absolute or signed, allowing switching between the signed and absolute values of the
summator.
A user-programmable threshold is available to compare the
Y
value with a constant when driving the output operand:
(EQ 5.9)
where:
Op is an output FlexLogic™ operand (for example,
SUMMATOR 1 OP
);
D
is the user-programmable threshold (for example,
SUMMATOR 1 PICKUP
);
Y is the operating value derived earlier (for example,
SUMMATOR 1 OUTPUT
)
The
Y
value becomes a FlexAnalog parameter itself. As such, it can be used by other summators, FlexElements™, and
user-programmable displays.
The settings for summator 1 are described below. The description applies to all six summators.
•
SUMMATOR 1 FUNCTION
: When set to “Enabled”, this setting allows summator functionality.
•
SUMMATOR 1 INPUT MODE
: This setting how the output data is formatted. When set to “Signed”, the sign (positive/
negative) of the input data summation remains intact. When set to “Absolute”, the absolute value of the summation is
used as the output value.
•
SUMMATOR 1 HOLD
: The output value to the summator is frozen when the FlexLogic™ operand assigned to this set-
ting is active (on).
•
SUMMATOR 1 PICKUP
: When the output value of the summator is greater than the value assigned to this setting, the
SUMMATOR 1 OP
FlexLogic operand is activated (set to on).
•
SUMMATOR 1 HYSTERESIS
: When the output value of the summator falls below the
SUMMATOR 1 PICKUP
–
SUMMA-
TOR 1 HYSTERESIS
value, the
SUMMATOR 1 OP
FlexLogic™ operand is deactivated (set to off). For example, if the
SUM-
MATOR 1 PICKUP
is “1.000” and the
SUMMATOR 1 HYSTERESIS
is “3.0%”, then the
SUMMATOR 1 OP
FlexLogic operand is
set to off when the resultant output value falls below 0.970.
•
SUMMATOR 1 UNITS
: This setting creates a character label for the summator output value display.
•
SUMMATOR 1 PU BASE
: This setting defines the per-unit base factor when using the
SUMMATOR 1 OUTPUT
FlexAn-
alog™ quantity in other N60 features, such as FlexElements™. This value is used to normalize the
SUMMATOR 1 OUT-
PUT
FlexAnalog™ quantity (that is, change it to a per-unit quantity). Refer to the
FlexElements™
section for additional
details on per-unit base values.
•
SUMMATOR 1 INPUT1(6)
: These settings select the FlexAnalog quantity to use as a summator input.
•
SUMMATOR 1 SCALE1(6)
: These settings apply a scale factor to their corresponding FlexAnalog input quantity as it
is evaluated.
•
SUMMATOR 1 POS1(6)
: These settings determines if a selected input is used during an evaluation of the summation
process. When the FlexLogic™ operand selected by this setting is activated (set to on), the summator will use the
SUM-
MATOR 1 INPUT
item multiplied by it's corresponding
SUMMATOR 1 SCALE
setting and apply it to the resultant output.
•
SUMMATOR 1 EVENTS
: This setting is used to generate events for the summator. The
SUMMATOR 1 OPERATE
event
is created on the rising edge of the
SUMMATOR 1 OP
FlexLogic™ operand.
Y
P
1
S
1
X
1
P
2
S
2
X
2
…
P
6
S
6
X
6
+
+
+
=
Op
Y
D
>
(
)
≡
or Op
abs
Y
( )
D
>
(
)
≡
