Abstract:
This paper presents a modified instantaneous power control
scheme of D-STATCOM for power factor and harmonic
compensation. The proposed control strategy has been introduced
in order to enhance some steady-state performances besides its
functional elimination of power quality disturbances. Power
factor and harmonic current of a controlled feeder section are two
vital roles in steady-state power distribution system operation.
Utilizing an already installed D-STATCOM to achieve these
additional control objectives can help system operators maximize
overall system performances. In this paper, a control scheme with
constant power and sinusoidal current compensation [1,2] is
exploited. In order to correct the power factor, a power factor
control loop is required and therefore included in the control
block. To verify its use, a 22-kV power distribution feeder
with a three-phase rectifier load was tested. Results showed that
integration of the proposed reactive power control loop can
correct the power factor of the controlled feeder to be unity power
factor.
