Conference Paper

Modeling and nonlinear control of shunt active power filter in the synchronous reference frame

Dept. of Electr. Eng., Ecole de Technol. Superieure, Montreal, Que.
DOI: 10.1109/ICHQP.2000.896994 Conference: Harmonics and Quality of Power, 2000. Proceedings. Ninth International Conference on, Volume: 1
Source: IEEE Xplore

ABSTRACT This paper presents a modeling and a nonlinear control of
three-phase voltage source shunt active filter. The modeling is based on
the abc/dq transformation of the AC system variables. The currents
injected by the active filter are controlled in the synchronous
orthogonal dq frame using a decoupled nonlinear control strategy. The
reference harmonic components are extracted from the sensed nonlinear
load currents by applying the synchronous reference frame method, where
a three-phase thyristor bridge rectifier with R-L load is taken as the
nonlinear load. The voltage level of the DC side is regulated using a
linearizing feedback control. The reference current needed to maintain a
regulated DC voltage is added to the current loop reference. The
transfer functions of the two loops are developed and synthesized to
obtain the desired stability and dynamic response. Simulation results
confirm the performances considered theoretically for the shunt active
filter topology

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    • "Further, the proposed control law has a discontinuous component forcing the system's trajectory to the sliding surface and a continuous component namely the equivalent control which is valid on the sliding surface. The active filter performance is tested when compensating for nonlinear load current harmonics and unbalances[6]. This paper also proposes a new simplified algorithm for the solution of the space vector PWM to the least degree by avoiding finding the solutions of the trigonometric functions, and is easy to implement practically. "
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