GE Power Quality Meter Series

A-8 PQM Power Quality Meter GE Power Management
A.1 PQM APPLICATION NOTES APPENDIX A
A
The number of subtractions can be reduced between the calculations of real and imaginary components by not
repeating the same subtraction twice. The following subtractions are repeated:
Substituting in the above ‘delta’ values results in the form of the equations that will be used to calculate the
phasors:
∆
0
g
0
g
8
–=
∆
4
g
4
g
12
==
∆
8
g
16
g
24
–=
∆
12
g
20
g
28
–=
∆
1
g
1
g
9
–=
∆
5
g
5
g
13
–=
∆
9
g
17
g
25
–=
∆
13
g
21
g
29
–=
∆
2
g
2
g
10
–=
∆
6
g
6
g
14
–=
∆
10
g
18
g
26
–=
∆
14
g
22
g
30
–=
∆
3
g
3
g
11
–=
∆
7
g
7
g
15
–=
∆
11
g
19
g
27
–=
∆
15
g
23
g
31
–=
Re g
()
1
8
---
∆
0
∆
8
k
1
∆
1
∆
7
–
∆
9
∆
15
–+
()
k
3
∆
3
∆
5
–
∆
11
∆
13
–+
()
++ +
()
=
Im
g
()
1
8
---
∆
4
∆
12
k
1
∆
3
∆
5
∆
11
∆
13
++ +
()
k
2
∆
1
∆
7
∆
9
∆
15
+++
()
++ +
()
=