TITLE:
Hybrid Control Strategy for Matrix Converter Fed Wind Energy Conversion System
AUTHORS:
Jamna Ayadathil, Jamuna Venkatesan
KEYWORDS:
Hybrid Control Strategy, Wind Energy Conversion System, Three Phase Matrix Converter, Space Vector Modulation, Over Current/Clamp Circuit Protection, FPGA Controller
JOURNAL NAME:
Circuits and Systems,
Vol.7 No.10,
August
18,
2016
ABSTRACT: In this paper, a hybrid
control strategy for a matrix converter fed wind energy conversion system is
presented. Since the wind speed may vary, output parameters like power,
frequency and voltage may fluctuate. Hence it is necessary to design a system
that regulates output parameters, such as voltage and frequency, and thereby
provides a constant voltage and frequency output from the wind energy
conversion system. Matrix converter is used in the proposed solution as the
main power conditioner as a more efficient alternative when compared to
traditional back-back converter structure. To control the output voltage, a
vector modulation based refined control structure is used. A power tracker is
included to maximize the mechanical output power of the turbine. Over current
protection and clamp circuit input protection have been introduced to protect
the system from over current. It reduces the spikes generated at the output of
the converter. The designed system is capable of supplying an output voltage of
constant frequency and amplitude within the expected ranges of input during the
operation. The matrix converter control using direct modulation method,
modified Venturini modulation method and vector modulation method was
simulated, the results were compared and it was inferred that vector modulation
method was superior to the other two methods. With the proposed technique,
voltage transfer ratio and harmonic profile have been improved compared to the
other two modulation techniques. The behaviour of the system is corroborated by
MATLAB Simulink, and hardware is realized using an FPGA controller.
Experimental results are found to be matching with the simulation results.