Microgeneration technologies, such as small-scale
wind turbines, fuel cells and Photovoltaics (PV) arrays,
connected to low-voltage distribution networks offer the
potential to reduce carbon emissions, to improve security of
supply and to contribute significantly to the energy mix. Many
types of microgeneration technologies are interfaced with the
low-voltage distribution network through power electronic
converters. The converter provides conversion of the
microsource frequency to the conventional power system
frequency of 50/60 Hz and controls the power exchange
between the generator and the load/utility system Therefore;
new control methods for these converters need to be developed
in order to exploit the microgeneration as effectively as
possible when connected to the network. This paper presents
analysis and design of microsources DC current control with
considering reactive power control, power factor control and
voltage regulator. The objective is to show that with an
adequate control the converter can transfer the dc energy from
microsource and improve the voltage stability and power
quality of the electrical system. Also it can protect the inverter
from over current and the microsource from overload. The
feasibility of the proposed control schemes was verified by a
digital simulation in PSCAD/EMTDC software program. |
