0BChapter 3
Functions
3-6
Functions
unctions
Measurement function
Measurement function
z
Active power
z
Active power
PMU1A
PMU1A
(Electric
power)
(Electric
power)
PMU2A
PMU2A
(Power
two-system)
(Power
two-system)
EMU8A
EMU8A
(Pulse/temperature)
(Pulse/temperature)
CTD8E
CTD8E
(CT
expansion)
(CT
expansion)
{
×
: two-system having measurement function O:
With
measurement function
X: Without measurement function
Measurement range: -99999999.9 to 99999999.9 W (minimum unit: 0.1 W)
The following active powers are measured: instantaneous value, maximum value, and
minimum value.
The active power means a consumed power. Power that is generating electricity is referred to
as regenerated power.
If the input current is less than low-cut setting value, the active power value is forced to be 0 W.
Measurement values to be logged include PMU1A (electric power) and PMU2A (power two-system)
only.
The measurement value of CTD8E (CT expansion) is excluded. (CTD8E (CT expansion)
does not have logging function.)
* CTD8E (CT expansion) can perform the two-system measurement only when it is
connected to PMU2A (power two-system).
z
Integrated power amount
PMU1A
(Electric
power)
PMU2A
(Power
two-system)
EMU8A
(Pulse/temperature)
CTD8E
(CT
expansion)
{
×
: Two-system having measurement function O: With
measurement function
X: Without measurement function
Measurement range: Excess of the measurement range of 0 to 999999999 Wh returns to 0
Wh, continuing the integration.
Power consumption (active power) and reverse power (regenerated power) are integrated
separated from each other. After the conversion of VT and CT ratios, power is also integrated.
Reactive power is also integrated. Via communication, integrated progression reactive power
amount, integrated delayed reactive power amount and integrated total reactive power
amount can be confirmed in units of varh. Each measurable amount is up to 999999999 varh.
When each amount measured reaches 999999999 varh, it is reset to 0 varh. The reactive
power amount to be integrated is divided into the three types: phase progression reactive
power, phase delayed reactive power, and total reactive power of phase progression and
phase delayed absolute values.
When the 3-STATE function is used for integration, the power measured during operation of
the facilities is specified as HIGH integrated power amount, the power measured while the
facilities are waiting is specified as MIDDLE integrated power amount, and the power
measured during stop of facilities is specified as LOW integrated power amount.
*
CTD8E
(CT expansion) can perform the two-system measurement only when it is
connected to PMU2A (power two-system).
* Measurement values to be logged include PMU1A (electric power) and PMU2A (power
two-system) only.
CTD8E
(CT expansion) does not have logging function.
¡
Definitions of phase progression and phase delayed of integrated reactive power amount
Whether the active power is active or regenerated, the integration progression reactive power
amount is integrated in the case of phase progression, and integrated delayed reactive power
amount is integrated in the case of phase delayed. In addition, for the integrated total reactive
power amount, the absolute value of progression reactive power amount and the absolute
value of delayed reactive power amount are integrated. The progression and delayed reactive
power amounts are calculated according to the phase of the voltage based current.
V
θ
進み無効電力
遅れ無効電力
－
90
ﾟ
＋
90
ﾟ
0
ﾟ
－
180
ﾟ
＋
180
ﾟ
I
－
Q
＋
Q
＋
Q
－
Q
瞬時電力の有効／回生に関わらず以下を積算
･積算進み無効電力量：－
Q
を積算
･積算遅れ無効電力量：＋
Q
を積算
･積算総合無効電力量：＋
Q
と－
Q
の両方の絶対値を積算
回
生
電
力
有
効
電
力
例
1
有効電力：有効
無効電力：遅れ
例
2
有効電力：回生
無効電力：進み
θ
I
Progression reactive power
The following power amounts are integrated whether point power is active or regenerated.
• Integrated progression reactive power amount: Integration of -Q
• Integrated delayed reactive power amount: Integration of +Q
• Integrated total reactive power amount: Integration of both absolute values of +Q and • Q
Example 2
Active power:
regeneration
Reactive power:
progression
Example 1
Active power: Active
Reactive power: Delayed
Regeneration powe
r
A
ctive powe
r
Delayed reactive power
