The Pqf Current Generator Hardware - ABB PQFM Instruction Manual

Up to 8 PQFM master panels can be connected in parallel providing full redundancy to
-
the customer
- In addition to using master panels only, PQFM units can be connected in a master-slave
arrangement.
4.3

The PQF current generator hardware

The power circuit of a PQFM unit is represented hereafter.
The description of the main components is given in
Item
1
2
3
4
5
6
7
The current generator is physically organized in power units. Each filter cubicle contains
one power unit. A PQFM filter can contain up to 8 power units. Power units can be
combined in a master-slave arrangement or in a master-master arrangement, the latter
giving full operational redundancy. The current rating of different units in a filter does
16 Hardware description ç Manual Power Quality Filter PQFM
AC power supply
L
4
Output filter
1
Figure 6: Power circuit diagram of a PQFM active filter
Table 5: Main components of a PQFM active filter
Main components
IGBT inverter
DC bus capacitors
PWM reactor
Output filter
Preload resistor
Main contactor
Auxiliary fuses
6
7
Preload
5
resistor
3
2
IGBT
Inverter
Master Unit
Table 5.
L