Abstract:
This paper describes synchronized control of
distribution static compensator (DSTATCOM) and
distributed generators (DG) in a Micro grid. With large
diffusion of distributed sources and system with single
phase operation system may even have disturbance in
voltage quite often if crosses the permissible limit.
Reactive power compensation cannot be always possible
with the devices having three phases at place of good
position with the feeders physically spread out.
Communication with DSTATCOM in a loop with a simple
control strategy is proposed in this paper. The main
factors like power flow in the line and the voltage sag are
considered in the proposed reactive compensation
technique. In order to moderate the reactive
compensation, communication can be done to
DSTATCOM with the help of feeders located at different
points having the voltage and power flow in line.
Maximum power which is actively available is provided
by DGs and the reactive power compensation is done in
the phase having shortage of reactive power with the help
of single-phase DSTATCOM. In order to increase the
reactive power inoculation ability of the DGs, the
maximum available active power is fixed to a value lower
than maximum active power during the permissible limit
of the reactive power of the DG. In case of
communication failure, a part of reactive compensation is
always required by a primary control loop based on local
measurement in the DSTATCOM. Permissible voltage
regulation is observed and ensured in the proposed
method. To validate the proposed method, presentation of
analysis of data circulation of the communication scheme
and power network and communication network closed
loop simulation are done.
