ade7880 Analog Devices, Inc., ade7880 Datasheet - Page 54

• Manufacturer Part Number: ade7880
• Description: Polyphase Multifunction Energy Metering Ic With Harmonic Monitoring
• Manufacturer: Analog Devices, Inc.

ADE7880
-reactive power of up to 3 harmonics:
-apparent power of up to 3 harmonics:
-power factor of up to 3 harmonics:
-total harmonic distortion plus noise of the phase current
Q
Q
Q
(
P
S =
S =
S =
pf
pf
pf
THD
z
x
y
z
x
z
IN, ISUM
y
x
y
z
=
=
=
=
IC, VC
= sgn
= sgn
IA, VA
IB, VB
= sgn
V
V
V
V
V
V
V
+
z
x
z
y
x
z
y
I
I
I
I
I
I
N
I
z
z
x
y
x
z
y
( )
( )
( )
)
cos
, x=2, 3, …, N
, z=2, 3, …, N
sin
, y=2, 3, …, N
Q
sin
Q
Q
I
sin
x
y
z
=
(
(
(
ϕ
(
ϕ
select the phase
ϕ
being monitored
ϕ
×
×
×
HCONFIG[2,1]
-HPHASE bits
z
z
x
y
I
S
S
P
P
S
P
−
−
−
2
−
y
y
z
z
x
x
I
γ
γ
γ
1
−
γ
, x=2, 3,…, N
, y=2, 3,…, N
, z=2, 3,…, N
z
z
x
I
y
)
)
)
1
2
)
, z=2, 3,…, N
, z=2, 3,…, N
, x=2, 3,…, N
, y=2, 3,…, N
-ACTPHSEL bits HCONFIG[9,8]
select the phase used to as time base
-HX, HY, HZ registers select the
harmonics to monitor
-HRATE bits HCONFIG[7:5] select the
update rate of harmonic registers
-HSTIME bits HCONFIG[4,3] select
the delay in triggering HREADY
interrupt
-HRCFG bit HCONFIG[0] selects if
HREADY flag in STATUS0 is set
immediately of after HSTIME
ADE7880 Harmonic
Calculations
Figure 57. ADE7880 harmonic engine block diagram
Rev. PrE | Page 54 of 103
HXVRMS
HYVRMS
HZVRMS
HXVRMS
HYVRMS
HZVRMS
results
FVRMS
ISUM
Output registers used when one of phases A, B, C is analyzed
-total harmonic distortion plus noise of the phase voltage
-harmonic distortion of up to 3 harmonics on the phase current
-harmonic distortion of up to 3 harmonics on the phase voltage:
(
HD
HD
HD
HD
HD
HD
THD
HXIRMS
HYIRMS
HZIRMS
HXIRMS
HYIRMS
HZIRMS
results
FIRMS
IN
V
V
V
I
I
I
x
z
y
x
y
z
+
=
=
=
=
=
=
N
V
V
I
I
V
V
V
I
I
V
I
I
1
1
HXWATT
HYWATT
HZWATT
x
1
z
1
y
x
z
1
results
1
HXVHD
)
y
FWATT
HYVHD
HZVHD
ISUM
V
, x=2, 3,…, N
, z=2, 3,…, N
, y=2, 3,…, N
, x=2, 3,…, N
, z=2, 3,…, N
, y=2, 3,…, N
=
V
2
V
results
HXVAR
HYVAR
Preliminary Technical Data
HZVAR
HXIHD
HYIHD
HZIHD
FVAR
−
1
IN
V
1
2
HXVA
HYVA
HZVA
current is analyzed
FVA
used when neutral
Output registers
HXPF
HYPF
HZPF
FPF
VTHDN
HXVHD
HYVHD
HZVHD
ITHDN
HXIHD
HYIHD
HZIHD