Kalibrasi Daya AC pada Power Quality Analyzer dengan Menggunakan Multiproduct Calibrator.id.en

Widyariset | Vol. 3 No. 1 (2017) Pg. 67-80
Calibration of the AC Power Power Quality Analyzer with
Use multiproduct calibrator
AC Power on Power Quality Analyzer Calibration Using a
multiproduct calibrator
biological Amalia 1 and Faisal Agah 2
1-2
1
Metrology Research Center - LIPI, PUSPIPTEK Complex, South Tangerang 15314, Banten, Indonesia
email: [email protected]
ARTICLEINFO
Abstract
Article history:
AC power calibration on power quality analyzer by using the indirect method has
been developed in the Research Center for Metrology, Indonesian In- stitute of
Science (LIPI). The measurement was performed by applying the input voltage and
input current from a standard multiproduct calibrator. Before being transferred to a
power quality analyzer, the input current was passed first to the current coil to
adapt the measuring range of the coil clamp of the power quality analyzer. Data
collection and evaluation to Determine the correction and uncertainty were Carried
out separately and alternately per phase. The analysis to Evaluate the
measurement of correction and uncertainty was developed by considering the
parameters that form the AC power, such as voltage, current, and phase angle.
Based on the result of the calibration data to the analysis,
Received date 31
May 2016
Received in revised form 3 February
2017 Accepted date date 29 March
2017 date Available online 31 May
2017
Keywords: Power quality analyzer, Current coil, AC power, Calibration,
Uncertainty
Keywords:
Abstract
Current coil power quality
analyzer
AC power calibration power quality analyzer with meng- use indirect
methods have been developed at the Research Center of Metrology LIPI.
Measurements carried out by applying a voltage and current inputs multiproduct
calibrator standard. Before it is fed to the power quality ana- lyzer, input
current is passed prior to the current coil
AC Power
Calibration
Uncertainty
to adjust the measuring range coil clamp on power quality analyzer. Data
retrieval and evaluation to find the corrections and uncertainty done separately
and alternately per phase. Analysis of the data for the evaluation of the
correction and the uncertainty pen- gukuran developed having regard to the
parameters that make up the amount of AC power, such as voltage, current,
and phase angle. From the analysis of calibration data, obtained a correction of
5% with the largest measurement uncertainty is
1.92% at the 95% confidence level and the coverage factor k = 2.
© 2017 Widyariset. All rights reserved
DOI: http://dx.doi.org/10.14203/widyariset.3.1.2017.67-80
67
Widyariset | Vol. 3 No. 1 (2017) Pg. 67-80
PRELIMINARY
φ
Sub-field at the Research Center of Metrology
voltage.
=
the phase angle of the current
Electrical Metrology LIPI (P2M-LIPI) has recently
In conducting the calibration service the
been utilizing a standard tool in the form of multiproduct
power meter, meter with a typical work- bench which
calibrator ( MPC) to be used in instrument
calibration services power meter ( power meter). MPC has a pair of terminal voltage and current pair of
terminals can be accommodated directly by
is a source ( source)
meng- use MPC (P2M-LIPI 2012). Therefore,
which is often used as a standard measurement
either input terminal voltage and input terminal flow
of electrical quantities in P2M-LIPI, one of which
of meters can be connected each in para- lel and
is for calibration of AC voltage on a meter
in series to output terminal
automatically (Syahadi, Sardjono, and Khairiyati
2012). Output voltage and current levels
simultaneously on the MPC, which is where the
voltage and output terminal MPC stream. But in
current signal can be synchronized with the
use, typical meter like this are usually only used
signal voltage, making it an apparent load power
in the laboratory. Utilization for use directly on the
plants ( phantom load). Phantom load This is an
utility transformer require additional
integrated system of components generating
instrumentation such as voltage transformers ( VT)
component voltages and currents that can work
and cur- rent transformers ( CT) (Bucci, Landi,
similarly to a source of electrical power as if
and Capua 1999).
weighed down by a burden (Faisal,
Perangin-wind, and Syahadi 2012). In addition,
the current phase can be removable in-phase
To access the power consumption directly
voltage from -180 ° to + 180 °. It represents a
from the utility, the typical utilization of the
state of pseudo lagging
measuring instrument portable more widely used.
Besides having a tang ren- larger measure, his
pemanfaatan- not need to break the load current
being used. Today, people who do da- lam AC
and leading an electrical power source that is
power measurement work activity began much
burdened by inductive and capacitive. The value of
use power measuring instrument called power
the power generated by a pseudo load source
quality analyzer ( PQA). In PQA application, users
no longer need to compose a meter and a current
source in series to obtain a large current flowing
in the load, but quite cupped coil clamp on
penghan- tar / cable and the current flowing is
already readable (Fluke Corporation 2006).
multiplication of individual constituent components
such as voltage, current, and phase angle of
current versus voltage, so follow a mathematical
equation as of Transportation equation is (1)
(Faisal 2015).
(
, ,φ )
[
× =IVWIVP
× cos] φ
(1)
Where: P
To get the value read correct AC power
=
AC power is supplied
from a PQA, the devices must be calibrated.
V
=
AC voltage supplied
Study on calibration PQA've done pre-set by
I
=
AC current is supplied
using the standard power quality calibrator Fluke
6100A, but
68
Amalia biological and Faisal Agah | Calibration of AC power to the Power Quality Analyzer ...
only for the amount of voltage, both voltages are
The division correction equation PQA reading
sinusoidal and non-sinusoidal (Cepisca et al.
on the magnitude of the AC power has been
2013). Da- lam this study, measurements were
described based on the phenomenon of actual
done by comparing the value of the AC power
measurement and evaluation of the uncertainty has
designation and appointment of the PQA
been derived from the equation (2) is. Corrections
standard MPC. Unlike typical work- bench power
and uncertainties pen- gukuran evaluated by taking
meter which can be accommodated directly using
standard procedures developed by P2M-LIPI
(Munir and Faisal in 2014), the development of
calibration methods necessary for typical portable
power meter this.
into account the parameters of voltage, current, and
phase angle supplied by the MPC and passed by
using coil current.
METHOD
AC power calibration method for PQA using
the MPC has been done in this study. This is
calibration power quality analyzer ( PQA) is
done to obtain a correction value and the
performed by using the indirect method where
estimated uncertainty valid and traceable to SI.
the standard used was a multiproduct cal- ibrator
Traceability power generated by the MPC is
( MPC) Fluke 5520A. This calibration also uses
current multiplier device
through
Standard Power Meter RMM 3001 which are
traceable to the SI through the National Institute
of Me- trologi Australia / NMIA (National
Measurement Institute of Australia 2012). AC
power calibration for PQA done by using
assistive devices such as flow multiplier is called
current coil 50- turn Fluke 5500A she'd connect on the
current channel MPC. The magnitude measured at
PQA is an active power, while the value of the
standard was released by the tense magnitude value
in an AC, AC current, and phase angle.
MPC is a source ( source)
current coil which is connected directly den- gan
which may deliver an AC voltage and AC current
MPC standards. Current coil This works like the
one phase. Therefore, in this calibration method,
working principle of the current transformer with a
data collection, evaluation, correction and
number of turns (N) specific (Fluke Corporation
evaluation to-tidakpastian done per phase carried
2002). When digu- nakan as the standard for power
out separately and alternately, and do not do the
plants, a combination of MPC and current coil This
measurement and evaluation of the AC three (3)
would generate power according to Equation (2)
phases in total. Each phase di- using a channel
(Fluke Corporation 2002).
measuring voltage, current channel, and coil clamp which
has been specifically determined as Table 1 beri-
][
STD STD STD VW
× ×P× =I N
cos φ
kut.
(2)
Where: P STD = power generated V STD = most
Table 1. connection settings
voltage settings the MPC I STD
Channel
phase Channel
= Current most settings the MPC N
= Number of turns current coil
φ
= The phase angle of current against voltage
69
coil Clamp
voltage Color Cable
Flow
1
line 1
Blue
line 1
SN. 93830035
2
line 2
Yellow
line 2
SN. 93930037
3
line 3
Red
line 3
SN. 93720129
Widyariset | Vol. 3 No. 1 (2017) Pg. 67-80
based on
schematic diagram
measurements presented in Figure
1,
Fluke 5520A (STD)
the voltage of the standard is fed directly to
I
V
the PQA using two-wire cabling. As for the
Hi
Hi
Lo
Lo
current path, before it is fed to the PQA, flow from
the MPC standard is passed prior to the toolkit
Blue /
Yellow /
Green
Red
input voltage
L1 L2 L3
current coil to adjust the measuring range coil
clamp as a current sensor. This is due to the
highest current range of MPC limited to 20 A only
(Fluke Corporation 2003),
while
N
Clamp
L ground
Lo Hi
1 2 3 N Current Input
Current Coil
Power Quality
Blue /
Analyzer
Yellow /
(UUT)
Red
Picture 1. A schematic diagram of a calibration system for
PQA calibration required in ga hing- current 100 A.
data retrieval PQA
Furthermore, coil clamp which has been linked to
the PQA linked to
coil current.
Table 2. Measuring point on the calibration PQA
In each phase measurement for the right
Voltage
Current
(Volt)
(Amperes)
120
5
different phase angles, namely 0 °, -36.87 °,
240
5
240
30
+ 36.87 °, -60 ° and + 60 °. For each phase angle at
240
100
dilaku- four-point measuring voltage and current
are shown in Table 2. Each of the current and
voltage measuring point is taken data for five
The quantity of electricity measured in this
one measuring point, data retrieval is done five
study are active AC power and the value which
times. Pengkuran at all phases and measuring point
evaluated the correction and the uncertainty of
performed at a frequency of 53 Hz. Selection of the
the reading function AC active power level. Di-
phase angle of 0 °, -60 ° and + 60 °, and the
use mathematical models shown by Equation (3),
frequency of 53 Hz is to follow the phase angle and
where P STD an active power generated by a
frequency bands in CCEM-K5 compare, Comparison
combination of MPC and current coil, while P UUC is
of 50/60 Hz Power (Carranza et al., Nd). While the
the average reading of the AC of PQA.
phase angle of -36.87 ° and + 36.87 ° is an angle To
Mathematically P STD defined by Equation (2) so as
toggle produce standard power factor, amounting to
to find a correction equation can be derived as in
a minimum of 0.8. The power factor to accommodate
Equation (4).
the assessment of the criteria limit the operating
requirements for generating units as stated in the
rules jaring- an electric power system of Java Madura - Bali (KESDM 2007)
[ ]
[ ] =
70
- UUC
STD= PPWC
[
, STD
STD
,
(3)
, cos
] -UUC
φ
PNIVWC(4)
Amalia biological and Faisal Agah | Calibration of AC power to the Power Quality Analyzer ...
tor-factors such as linearity, stability, tem-
Voltage and current values ​most settings
perature coefficient, and drift. Therefore it is
necessary to add the correction. Correction is
known, as obtained from a calibration certificate,
can been implemented in the equation and
correction of unknown value can been
implemented zero in the equation. However,
each of these sources of uncertainty still count in
the calculation of the uncertainty in which the
value taken from the MPC and the technical
specifications coil current.
on the standard (V STD and I STD) is the nominal value
indicated by the MPC. This value needs to be
corrected in advance to obtain the actual value of
the voltage and current supplied to the PQA. The
correction needs to be added include the
correction of the standard used (MPC) and the
correction caused by other factors, such as:
correction caused by gain and linearity MPC,
correction for their loading effect, correction caused
by drift MPC, corrections due temperature
coefficient, and corrections sourced from MPC
stability. Value correction along with the
uncertainty of the standards used were obtained
from a calibration certificate. Value corrections and
uncertainties are taken from the MPC's certificate
selan- consecutive jutnya called correction and
uncertainty (from) certificate. While the correction
values ​are derived from other factors (ie: gain, linearity,
loading effect, drift, temperature coefficient, and
stability) is derived from the reference data. In this
study, the determination of the correction factors
are ignored and zero at the calculation formula
correction. However, these correction factors are
taken into account and compensated for in the
calculation of uncertainty. Value uncertainties
combined to factors other than the calibration
certificate is taken from the technical specifications
MPC (Fluke Corporation 2003). To facilitate
The phase angle (φ) which is set on the MPC
is also the nominal value. Correction on the value of
the phase angle ignored by also considering the
uncertainty of the value taken from the MPC's
technical specification phase angle parameter.
Data shown by PQA is limited only to a
certain digit. Inya-Art, AC power data that is read
by PQA influenced by the smallest resolution of
the reading. Resolution correction is added in the
equation are equal to zero and uncertainties
whose value is proportional to half the resolution.
Based on the explanation above, the equation is of
Transportation (4) can be reduced to of Transportation
equation is (6), which is an equation to find the value of
active power correction AC readings.
After the evaluation to obtain a reading
correction AC active power, at every measuring
discussion,
point to be evaluated to get ketidakpas- tian
to further uncertainties as a result of other factors
measurement. The evaluation of the sources of
beyond the MPC certificate is referred to as the
uncertainty in the calibration PQA indirectly done
uncertainty (of) the MPC specifications.
by two methods, the type-A and type-B in
accordance with the rules of calculation of the
Flow issued by the MPC (I STD) passed prior to
measurement uncertainty (JCGM 2008) and
the
current coil and strengthened (N) before being fed
to the input channel flow PQA. Similar to the
voltage, the output current of of MPC then
through
current coil also influenced by fak-
lesson learned from case studies of current measurement
(Jaiswal, Ojha, and Singh 2005).
71
Widyariset | Vol. 3 No. 1 (2017) Pg. 67-80
[ ] =
[(
+
[ ] = [(
)spekN
• ( spekI+C SERTI C STD
+ I spekV )C• (
sertV+C STD
CNVWC )• cos ( φ+
+
+
Certi )C•(STD I sertV +
C STD VWC ) • N • cos
AC voltages most settings
=
+ PCres
C ave
]
(5)
]
(6)
value obtained through the statistical approach.
While the type-B uncertainty is the uncertainty
on MPC
I STD
Pave
)]- [
A-type uncertainty is the uncertainty that the
Description: V STD
=
() φ] -[
φ
that value is obtained based on information that
AC current most settings on MPC
makes it possible to obtain from the standard or
other tools used. Such information may include
N
=
the number of windings current coil
φ
=
the phase angle most settings on MPC
data on measurements taken before, experience
or knowledge about the behavior of the tool, the
manufacturer's technical specifications, data from
ser- tifikat calibration, or data from the manual
P ave
=
(JCGM 2008).
the average power readings at
PQA
C sertV =
MPC certificate un- tuk correction
parameter AC voltage
C certi
=
In this calibration method, measurement
MPC certificate tuk correction
uncertainty comes from two sources, namely the
parameter AC current un-
C spekV =
realization of the reference value and its AC power current
correction due to the gain,
coil and reading the value of the PQA. Based on the
linearity, loading effect, drift, temperature mathematical model of reference for reading
coeffi cient, and the stability of the
correction AC power levels of Transportation
MPC for AC voltage parameter
represented by the equation is (3), the sensitivity
coefficient values ​for all input quantities is equal to
one. The combined uncertainty can be written with
C spekI =
a formulation as in Equation (7).
correction due to the gain,
linearity, loading effect, drift, temperature
coeffi- cient, and the stability of the
MPC for AC current parameters
C spekN =
c
correction due ieritas lin,
()
[ ] =
u P u(WC u
)+
UUC 2 1
( P 2 2 STD )
(7)
stability, temper ture
coefficient, and coil current drift
Cφ
=
Where:
u 1 ( P STD
correction due to the gain,
)
=
Uncertainty AC
power most settings the
MPC and current coil
linearity, loading effect, drift, temperature
coeffi- cient, and the stability of the
MPC for the phase angle parameter
C res
=
u2
resolution correction
( P UUC )
=
Ketidakpastianyang
sourced from the
reading value by PQA
72
Amalia biological and Faisal Agah | Calibration of AC power to the Power Quality Analyzer ...
The most uncertainty AC Power
settings the MPC and Current Coil
(
u sertVu= 2 , where U is a discrepancy
MPC's uncertainty AC voltage parameters
obtained from calibration cert MPC 2015
(P2M-LIPI 2015). Uncertainties specifications for
parame- ter MPC AC voltage (u spekV) evaluated
using the method of type B with him- sumsikan
normally distributed with 99% confidence kat tingand mathematically expressed by
P( u STD 1 ) )
In accordance with a mathematical model of AC
active power shown by Equation (2), the
uncertainty u 1 the combined uncertainty of the
uncertainty that comes from the AC voltage
parameter MPC (u V), AC current MPC (u I), MPC
phase angle (u φ), and coil current ( u N). To simplify
step will accelerate the process and minimize the
u spekVu= 2, 6 , Where
U is defined as the absolute uncertainty obtained
from Operating Manual Book MPC (Fluke
Corporation
occurrence of errors of calculation formula to
2003).
the calculation,
discrepancy
This uncertainty is calculated in relative value. This
calculate the reduction coefficient of sensitivity, but
does not eliminate the factors making up the
Uncertainty of AC current parameters MPC (u I)
combined uncertainty.
Uncertainty derived from the parameters of
the AC current supplied by the MPC (u I) a
combination of uncertainty uncertainty certificate
for AC current parameters (u certi) the MPC's
Uncertainty of parameters MPC
AC voltage (UV)
uncertainty specifications AC current parameters
(u spekI). This uncertainty is mathematically
expressed by Equation (10). value u I is further
Uncertainty derived from the parameters of the AC
voltage supplied by the MPC (u V)
a combination of uncertainty certificate
uncertainty MPC specifications for an AC tense
expressed in relative form by using Equation (11)
where I settings is the supply current is shown by the
parameter (u spekV). This uncertainty is
MPC.
uncertainty for parameter AC voltage (u sertV) and
mathematically expressed by Equation (8). value
u V subsequently expressed in the form of equation
is relative to the use of Transportation (9) where
V settings is the supply voltage indicated by the MPC.
(10)
(11)
(8)
(9)
Certificate for PA-rameter uncertainty of
current (u certi) evaluated using the method of type B
Uncertainty
certificate
with him- sumsikan normally distributed and
for
mathematically expressed by
AC voltage parameter (u sertV) dieva- luasi using the
u certiu= 2
, where U is the uncertainty of the MPC to AC
current parameters obtained
type B is assumed to be normally distributed and
mathematically expressed as:
73
Widyariset | Vol. 3 No. 1 (2017) Pg. 67-80
of calibration certificate MPC 2015 (P2M-LIPI
2015). MPC's uncertainty cation spesifi- AC
current parameters (u spekI)
φ
=
the phase angle
Δφ
=
absolute uncertainty corner
phase for one year,
evaluated using the method with a type B is
based on the working frequency
assumed to be normally distributed with a 99%
is in use.
confidence level and is mathematically expressed
by
u spekIu= 2, 6 , where U is ketidakpastian absolute obtained from
Operating Manual Book MPC (Fluke Corporation
2003).
Uncertainty of the coil current assistive
devices (u N)
The uncertainty that comes from auxiliary devices current
coil evaluated using the method of type B. These
uncertainties diasum- sikan normally distributed
The uncertainty of the phase angle parameter
MPC (uφ)
with a confidence level of 99% (Fluke Corporation
Uncertainties from the phase angle parameters
2002), and mathematically expressed in Equation
are set on the MPC (u φ) die-valuation method type
(13).
B. formulations technical specifications that are
used to obtain the value of this uncertainty has
been expressed in the relative size and listed in Operating
Manual Book
effective output current current coil measured. U
value obtained from
distribution are scattered all normal means and
Instruction Sheet Fluke 5500A Coil Current
99% confidence level, the formulation to look for
(Fluke Corporation 2002).
this uncertainty is written in Equation (12).
φ [%]
(
cos
Φ-=
cos
21u
,
+
()φ Δ
φ )•
•
••
Uncertainty AC power most
settings the MPC and current coil
( u 1 ( P STD ) ) ketidakpas tian is defined as a
combination of four parameters in the above
formula expressed by Equation (14). To get the
absolute value, u 1 ( P STDRelatif) to be multiplied with the
most power settings the MPC standards were fed
to a PQA (P setting) in accordance with Equation (15).
(12)
, 100 6 %
Where: u φ
=
2 U uN
,6
U is defined as the total specification of the
MPC (Fluke Corporation 2003). With the assumed
•
•
••
(13)
[%] =
Parame ter uncertainty of the phase
angle
(14)
(15)
74
Amalia biological and Faisal Agah | Calibration of AC power to the Power Quality Analyzer ...
Uncertainties Sourced from reading value
by PQA (
u ( UUC 2 P
Value uncertainties final calibration PQA
sought on a stretch of uncertainty ( Expanded
))
Uncertainty)
with a 95% confidence level. Factors used and
calculation of coverage refers to the combined
uncertainty GUM guide (JCGM 2008).
AC power readings performed by PQA
mathematically represented by Equation (16)
where P ave is an average of five times the reading
of data retrieval. In this analysis method, the
correction resolution (C res) in Equation (5) be
considered zero. Therefore, the parameter C res
This included in one of the components of
RESULTS AND DISCUSSION
uncertainty as the late follow-compensation.
PQA calibration results data are successfully
Thus, the uncertainty that comes from reading
retrieved for all three phases as shown in Table 3 in
the data by PQA uncertainty consists of two
the column reading tool. The data is the average of
components, namely the repeated readings by
PQA ( repeatability) and the smallest scale reading
(resolution).
UUC
[]
five times the data retrieval and further be provided
a basis for seeking the value of the correction and
the uncertainty of measurement.
+ CPWP
ave
res
=
Correction designation AC power levels
(16)
found using Equation (6). Correction certificate for
voltage parameters (C sertV) and current (C certi) taken
Based on the equation (16), the uncertainty
from the calibration certificate MPC 2015. For
that comes from PQA (
(u P UUC 2 ) )
is uncertainty
measuring points that are not listed on the
certificate, carried out intra- polasi method to get
a combination of uncertainty repeat- ability and
the value of his corrections. By using Equation (6),
great uncertainty with coefficients of sensitivity
a score correction designation AC power levels for
and resolution of each is a valuable one.
each measuring point on phase 1, phase 2, and
Mathematically expressed by Equation (17).
phase 3 as shown in Table 3. The results showed
the largest correction for each measuring point
(
UUC 2
) []
P=u u u
(
) res+2 ave
WP
2
voltages and currents occur the phase angle of +
(17)
60 ° and -60 °. For all measuring points in all
Repeat readings uncertainty (u (P ave)) analysis
phases, the largest correction occurred in phase
evaluated using a type-A standard deviation of
1, which is the measuring point 240 V, 5 A, and
the average experimental ( Experiment Standard
the phase angle of + 60 °, with great value for the
Devi- ation of Mean) five times the retrieval of
data (JCGM 2008). Peng due to uptake of data is
done five times, the degree of freedom of this
uncertainty is the uncertainty 4. While reading the
smallest scale (u res) evaluated using the method
with a type-B was assumed rectangular
distributed with infinite degrees of freedom.
correction of 5%.
After correction for each measuring point is
obtained, the measurement uncertainty is
calculated by Equation (7) and also the calculation
of an uncertainty bentang-. The evaluation results
are presented in Table uncertainty 4 found that the
biggest uncertainty for any point of measuring
current and voltage occurs in
75
Widyariset | Vol. 3 No. 1 (2017) Pg. 67-80
+60 and -60 phase, amounting to 1.92%. This
the phase angle of + 60 ° and -60 °. From all points of
measuring current, voltage and phase angle is taken, the
happens in all phases (Phase 1, 2, and
biggest uncertainty at the point most can measure 120 V, 5
3).
A, and the angle
Table 3. Measurement data and correction of the Appointment of the AC power calibration PQA
tension
Current
settings
settings
(V)
(A)
120
5
Power
Angle
settings
(Deg)
(KW)
5
30
100
phase 3
Reading
(KW)
(%)
Tool (kW)
Reading
Correction
(KW)
(%)
Tool (kW)
Current
settings
(V)
(A)
120
5
240
240
240
5
30
100
(%)
0.60
0,00
0,00
0.60
0,00
0,00
0.60
0,00
0,00
0.49
- 0.01
- 2.09
0.48
0,00
0,00
0.49
- 0.01
- 2.09
0.47
0.01
2.08
0.47
0.01
2.08
0.47
0.01
2.08
- 0.01
- 3.34
- 60
0.30
0.31
- 0.01
- 3.34 0.31
- 0.01
- 3.34 0.31
+ 60
0.30
0.29
0.01
3.33
0.29
0.01
3.33
0.29
0.01
3.33
0
1.20
1.20
0,00
0,00
1.20
0,00
0,00
1.20
0,00
0,00
- 36.87
0.96
0.97
- 0.01
- 1.05 0.97
- 0.01
- 1.05 0.97
- 0.01
- 1.05
0.94
0.02
2.08
0.02
2.08
0.02
2.08
- 0.02
- 3.34
0.94
0.94
- 60
0.60
0.62
- 0.02
- 3.34 0.62
- 0.02
- 3.34 0.62
+ 60
0.60
0.57
0.03
5.00
0.02
3.33
0.58
0.02
3.33
0
7,20
7,20
- 0.01
- 0.14 7.19
0,00
0,00
7,20
- 0.01
- 0.14
- 36.87
5.76
5,83
- 0.08
- 1.36 5.80
- 0.05
- 0.84 5.83
- 0.08
- 1.36
5.69
0.06
1.07
0.05
0.90
0.06
1.07
- 0.11
- 2.92
0.58
5.70
5.69
- 60
3.60
3.70
- 0.11
- 2.92 3.67
- 0.08
- 2.09 3.70
+ 60
3.60
3.50
0.09
2,63
0.07
2.08
3.50
0.09
2,63
0
24.0
24.0
- 0.03
- 0.14 23.8
0.17
0.69
23.8
0.17
0.69
- 36.87
19.2
19.3
- 0.13
- 0.66 19.1
0.07
0.38
19.2
- 0.03
- 0.14
19.1
0.07
0.38
0.27
1.42
18.9
0.27
1.42
- 0.02
- 0.14 12.1
- 0.12
- 0.98
0.18
1.52
0.28
2.36
3.52
18.9
- 60
12.0
12.1
- 0.14
- 1.14 12.0
+ 60
12.00
11.8
0.18
1.52
11.80
11.70
Table 4. Uncertainty each measuring point on the calibration PQA
settings
(KW)
0.48
+ 36.87 19.2
tension
Correction
0.60
+ 36.87 5.76
240
Tool (kW)
phase 2
Correction
- 36.87
+ 36.87 0.96
240
Reading
0
+ 36.87 0.48
240
phase 1
Angle
(deg)
Uncertainty stretch
Uncertainty stretch
Uncertainty stretch
of Phase 1
of Phase 2
of Phase 3
(KW)
%
(KW)
%
(KW)
%
0
0.01
0.99
0.01
0.99
0.01
0.99
- 36.87
0.01
1.22
0.01
1.22
0.01
1.22
+ 36.87
0.01
1.22
0.01
1.22
0.01
1.22
- 60
0.01
1.92
0.01
1.92
0.01
1.92
+ 60
0.01
1.92
0.01
1.92
0.01
1.92
0
0.01
0.55
0.01
0.55
0.01
0.55
- 36.87
0.01
0.66
0.01
0.66
0.01
0.66
+ 36.87
0.01
0.66
0.01
0.66
0.01
0.66
- 60
0.01
1.01
0.01
1.01
0.01
1.01
+ 60
0.01
1.01
0.01
1.01
0.01
0
0.04
0.55
0.04
0.55
0.04
1.01
0.55
- 36.87
0.03
0.56
0.03
0.56
0.03
0.56
+ 36.87
0.03
0.56
0.03
0.56
0.03
0.56
- 60
0.02
0.61
0.02
0.61
0.02
0.61
+ 60
0.02
0.61
0.02
0.61
0.02
0.61
0
0.1
0.57
0.1
0.57
0.1
0.57
- 36.87
0.1
0.60
0.1
0.60
0.1
0.60
+ 36.87
0.1
0.60
0.1
0.60
0.1
0.60
- 60
0.1
0.81
0.1
0.73
0.1
0.73
+ 60
0.1
0.73
0.1
0.73
0.1
0.73
76
Amalia biological and Faisal Agah | Calibration of AC power to the Power Quality Analyzer ...
Table 5. The components of uncertainty for all measuring point on the measurement of phase 1
Figure 2. Graphs and uncertainties PQA correction value for all the measuring point on phase 1
77
Widyariset | Vol. 3 No. 1 (2017) Pg. 67-80
Typical measurements in phase 1 are
like contributor greatest uncertainty in this
presented in Table 5, tian ketidakpas- component
calibration method, which is the resolution of the
that acts as the biggest contributor is divided into
reading of data on the PQA and uncertainties MPC
two types based on current range given in the
certificate for the current parameter. Verification is
PQA. For low current (below 30A), the biggest
done by using an accuracy specification of PQA and
contributor to the uncertainty is the uncertainty of
didapa- VING correction value and the uncertainty
the resolution. While at high current ranges (over
of measurement for all measurement points that are
30 A), the biggest contributor to the uncertainty is
within the range of the upper limit and lower limit of
the uncertainty of the MPC certificate for the
the specification PQA. Therefore, it can be said that
current parameter.
the system calibration and analysis conducted can
be used to test the performance of PQA.
Value correction and the uncertainty that has been
obtained from the evaluation of the steering dian verified
the accuracy specifications of PQA. The graph in Figure
2 shows the value of the correction and the uncertainty
for all the measuring point does not exceed the upper
limit line and lower limits of the accuracy specifications
THANK-YOU NOTE
PQA. The entire correction and uncertainties, including
The author would like to thank Metrology
the biggest correction contained in the measuring point
Research Center LIPI has facilitated this
240 V, 5 A, and the phase angle of 60 ° by 5%, and the
research. In addition, the authors also thank Dr.
biggest uncertainty contained in the measuring point of
Ika Kartika of Materials and Metallurgical
120 V, 5 A, and the phase angle of 60 ° and -60 ° by
Research Center LIPI above guidance, criticism,
1.92%, fall within the accuracy specifications of PQA.
and constructive feedback during the writing of
Therefore, the calibration system and method of analysis
this.
has been conducted in this study can be used to test the
performance of PQA.
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