A Novel Control Method for
Shunt Active Power Filters Using SVPWM
ABSTRACT
A novel control method for shunt active power
filters using SVPWM is presented. In the proposed control method, The APF
reference voltage vector is generated to instead of the reference current, and
the desired APF output voltage is generated by space vector modulation. The
control algorithm is simple and can be realized by a low cost controller. The
active power filter based on the proposed method can eliminate harmonics,
compensate reactive power and balance load asymmetry. A 10kVA laboratory
prototype of APF is designed. This prototype adopts the voltage source inverter
as the main power circuit and low cost DSP ADMC326 as control core. Simulation
and experimental results proves the validity of the analysis and the
feasibility of the APF with the proposed control method.
KEYWORDS
1.
Active power
filter
2.
SVPWM
3.
DSP
SOFTWARE: MATLAB/SIMULINK
BLOCK
DIAGRAM:
Figure
1. Control block diagram of proposed active power filter
Figure
2.Configuration of an active power filter using a SVPWM
CONCLUSION:
In
this paper, a novel simplified control method, which is suitable for digital
control realization, for the active power filter using SVPWM is proposed. This
method requires few sensors, and is simple in algorithm, fixed in switching frequency
and able to compensate harmonics, reactive power and unbalance loads
instantaneously. The performance of active power filters with this method in
compensating harmonics is examined and proved to be excellent. The simple algorithm
will be able to reduce the complexity of the control circuitry and cut the cost
of the system.
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[4]
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[5]
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