AN ACTIVE DAMPER FOR STABILIZING POWERELECTRONICS-BASED AC SYSTEMS
ABSTRACT:
The interactions among the parallel grid-connected converters coupled
through the grid impedance tend to result instability and power quality problems.
To address them, this project proposes an active damper based on a high
bandwidth power electronics converter. The general idea behind this proposal is to
dynamically reshape the grid impedance profile seen from the point of common
coupling of the converters, such that the potential oscillations and resonance
propagation in the parallel grid-connected converters can be mitigated.
BLOCK DIAGRAM:
HARDWARE DIAGRAM:
AC supply
Active rectifier 1
Common coupling
Active rectifier 2
Output
Output
Driver
circuit
12 v dc
supply
Pulse
generating
unit
5 v dc
supply
TOOLS:
1. Orcad/pspice.
2. PIC controller.
3.Matlab/simulation