PQM-700 Operating Manual
36
Apparent energy
E
S
VAh
𝐸
𝑆
= ∑ 𝑆(𝑖)𝑇(𝑖)
𝑀
𝑖=1
where:
i
is subsequent number of the 10/12-period measure-
ment window
S(i)
represents apparent power
S
calculated in
i
-th
measuring window
T(i)
represents duration of
i
-th measuring window (in
hours)
5.2
Split-phase network
Split-phase network
(parameters not mentioned are calculated as for single-phase)
Parameter
Method of calculation
Name
Designa-
tion
Unit
Total active power
P
tot
W
𝑃
𝑡𝑜𝑡
= 𝑃
𝐴
+ 𝑃
𝐵
Total Budeanu reactive
power
Q
Btot
var
𝑄
𝐵𝑡𝑜𝑡
= 𝑄
𝐵𝐴
+ 𝑄
𝐵𝐵
Total reactive power of
fundamental component
Q
1tot
var
𝑄
1𝑡𝑜𝑡
= 𝑄
1 𝐴
+ 𝑄
1𝐵
Total apparent power
S
tot
VA
𝑆
𝑡𝑜𝑡
= 𝑆
𝐴
+ 𝑆
𝐵
Total apparent distortion
power
S
Ntot
VA
𝑆
𝑁𝑡𝑜𝑡
= 𝑆
𝑁𝐴
+ 𝑆
𝑁𝐵
Total Budeanu distortion
power
D
Btot
var
𝐷
𝐵𝑡𝑜𝑡
= 𝐷
𝐵𝐴
+ 𝐷
𝐵𝐵
Total Power Factor
PF
tot
-
𝑃𝐹
𝑡𝑜𝑡
=
𝑃
𝑡𝑜𝑡
𝑆
𝑡𝑜𝑡
Total displacement
power factor
cos
tot
DPF
tot
-
cos 𝜑
𝑡𝑜𝑡
= 𝐷𝑃𝐹
𝑡𝑜𝑡
=
1
2
(cos 𝜑
𝐴
+ cos𝜑
𝐵
)
Total tangent
tan
tot
-
𝑡𝑎𝑛𝜑
𝑡𝑜𝑡
=
𝑄
𝑡𝑜𝑡
𝑃
𝑡𝑜𝑡
where:
Q
tot
= Q
Btot
, when Budeanu method was chosen,
Q
tot
= Q
1tot
, when IEEE 1459 method was chosen,
Total active energy (con-
sumed and supplied)
E
P+tot
E
P-tot
Wh
𝐸
𝑃+𝑡𝑜𝑡
= ∑ 𝑃
𝑡𝑜𝑡+
(𝑖)𝑇(𝑖)
𝑀
𝑖=1
𝑃
𝑡𝑜𝑡+
(𝑖) = {
𝑃
𝑡𝑜𝑡
(𝑖) 𝑓𝑜𝑟 𝑃
𝑡𝑜𝑡
(𝑖) > 0
0 𝑓𝑜𝑟 𝑃
𝑡𝑜𝑡
(𝑖) ≤ 0
𝐸
𝑃−𝑡𝑜𝑡
= ∑ 𝑃
𝑡𝑜𝑡−
(𝑖)𝑇(𝑖)
𝑀
𝑖=1
𝑃
𝑡𝑜𝑡−
(𝑖) = {
|𝑃
𝑡𝑜𝑡
(𝑖)| 𝑓𝑜𝑟 𝑃
𝑡𝑜𝑡
(𝑖) < 0
0 𝑓𝑜𝑟 𝑃
𝑡𝑜𝑡
(𝑖) ≥ 0
where:
i
is subsequent number of the 10/12-period measure-
ment window
P
tot
(i)
represents total active power P
tot
calculated in
i
-th
measuring window
T(i)
represents duration of
i
-th measuring window (in
hours)
Summary of Contents for PQM-700
Page 85: ...85 Notes...
