Harmonic Suppression Guideline; Calculation Of Outgoing Harmonic Current - Mitsubishi Electric FR-D700 Manual

Harmonic suppression guideline

Harmonic currents flow from the inverter to a power receiving point
via a power transformer. The harmonic suppression guideline was
established to protect other consumers from these outgoing
harmonic currents.
The three-phase 200V input specifications 3.7kW or less, single-
phase 200V input specifications 2.2kW or less, single-phase 100V
input specifications 0.75kW or less are previously covered by
"Harmonic suppression guideline for household appliances and
general-purpose products" and other models are covered by
"Harmonic suppression guideline for consumers who receive high
voltage or special high voltage". However, the transistorized
inverter has been excluded from the target products covered by
"Harmonic suppression guideline for household appliances and
general-purpose products" in January 2004 and "Harmonic
suppression guideline for household appliances and general-
purpose products" was repealed on September 6, 2004.
All capacity and all models of general-purpose inverter used by
specific consumers are covered by "Harmonic suppression
guideline for consumers who receive high voltage or special high
voltage".
"Harmonic suppression guideline for consumers who receive high
voltage or special high voltage"
This guideline sets forth the maximum values of harmonic currents
outgoing from a high-voltage or especially high-voltage consumer
who will install, add or renew harmonic generating equipment. If any
of the maximum values is exceeded, this guideline requires that
consumer to take certain suppression measures.
Users who use models other than the target models are not covered
by the guideline. However, we ask to connect an AC reactor or a DC
reactor as before to the users who are not covered by the guideline.
For compliance to the harmonic suppression guideline for
consumers who receive high voltage or special high voltage
Input
Target
Power
Capacity
Supply
Make a judgment based on "Harmonic
suppression guideline for consumers who
receive high voltage or special high voltage"
issued by the Japanese Ministry of Economy,
Trade and Industry (formerly Ministry of
International Trade and Industry) in
Single-phase September 1994 and take measures if
100V necessary. For calculation method of power
Single-phase supply harmonics, refer to materials below.
200V All Reference materials
Three-phase capacities
200V
Three-phase
400V
31
Countermeasures
"Harmonic suppression measures of the
inverter"
Jan. 2004 Japan Electrical Manufacturer's
Association
"Calculation method of harmonic current of
the general-purpose inverter used by
specific consumers"
JEM-TR201 (revised in Dec. 2003): Japan
Electrical Manufacturer's Association
Japan Electrical Manufacturer's Association
For compliance to "Harmonic suppression guideline of the
transistorized inverter (input current of 20A or less) for consumers
other than specific consumers" published by JEMA.
Input
Target
Power
Capacity
Supply
Single-
Connect the AC reactor or DC reactor
phase 0.75kW or less
recommended in a catalog or an
100V
instruction manual.
Single- Reference materials
phase 2.2kW or less "Harmonic suppression guideline of the
200V general-purpose inverter (input current of
20A or less)"
Three-
JEM-TR226 (revised in Dec. 2003): Japan
phase 3.7kW or less
Electrical Manufacturer's Association
200V

Calculation of outgoing harmonic current

Outgoing harmonic current = fundamental wave current (value converted
from received power voltage) × operation ratio × harmonic content
Operation ratio: Operation ratio = actual load factor operation
Harmonic content: Found in Table.
Table 1: Harmonic Contents (Values at the fundamental current of 100%)
Reactor 5th 7th 11th 13th 17th 19th 23rd 25th
Not used
65 41
Used
Three-phase
38 14.5
(AC side)
bridge
Used
(Capacitor 30 13
(DC side)
smoothing)
Used
28 9.1
(AC, DC sides)
Single-phase Not used
50 24
bridge
Used
(Capacitor 6.0 3.9
(AC side)*
smoothing)
∗ The harmonic contents for "single-phase bridge/with reactor" in the table
1 are values when the reactor value is 20%. Since a 20% reactor is large
and considered to be not practical, harmonic contents when a 5% reactor
is used is written in the technical data JEM-TR201 of The Japan
Electrical Manufacturers'
Association and this value is recommended for calculation for the actual
practice.
Table 2: Rated Capacities and Outgoing Harmonic Currents for Three-phase
Inverter Drive
Outgoing Harmonic Current Converted from
Rated
Current [A]
200V 400V 5th
0.4
1.61 0.81 49 0.57 31.85 20.09 4.165 3.773 2.107 1.519 1.274 0.882
0.75 2.74 1.37 83 0.97 53.95 34.03 7.055 6.391 3.569 2.573 2.158 1.494
1.5
5.50 2.75 167 1.95 108.6 68.47 14.20 12.86 7.181 5.177 4.342 3.006
2.2 7.93 3.96 240 2.81 156.0 98.40 20.40 18.48 10.32 7.440 6.240 4.320
3.7
13.0 6.50 394 4.61 257.1 161.5 33.49 30.34 16.94 12.21 10.24 7.092
5.5
19.1 9.55 579 6.77 376.1 237.4 49.22 44.58 24.90 17.95 15.05 10.42
7.5
25.6 12.8 776 9.07 504.4 318.2 65.96 59.75 33.37 24.06 20.18 13.97
Countermeasures
time ratio during 30 minutes
8.5 7.7 4.3 3.1 2.6 1.8
7.4 3.4 3.2 1.9 1.7 1.3
8.4 5.0 4.7 3.2 3.0 2.2
7.2 4.1 3.2 2.4 1.6 1.4
⎯ ⎯
5.1 4.0 1.5 1.4
⎯ ⎯
1.6 1.2 0.6 0.1
6.6kV (mA)
(No reactor, 100% operation ratio)
7th 11th 13th 17th 19th 23rd 25th