WEBREVIEW

Harmonic current cancellation and control of a grid-connected synchronous generator entrained by a wind turbine

Nonlinear devices, such as power electronics converters inject harmonic
currents in the AC system and increase overall reactive power demanded by the
equivalent load. Also, the number of sensitive loads that require ideal sinusoidal supply
voltages for their proper operation has increased. In order to keep power quality under
limits proposed by standards, it is necessary to include some sort of compensation.
Different types of power quality compensators of higher or lower complexity have been
reported. It is now well known that an active filter can easily compensate for harmonic
current contents in the load current by inserting negative harmonics into the power
network. The aim of this paper is to present the efficiency of the electrical part of a wind
generation system with a synchronous generator. In attempt to minimize the commutation
frequency harmonics in the current and voltage in the stator and to avoid the overlap
phenomenon in the diode bridge, an LC filter is inserted between the excited circuit and
the DC-DC converter. Simulation results are curried out to validate the proposed
solution.


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