Current control implementation with deadbeat algorithm for three-phase current-source active power filter

Graduate School of Science and Engineering, Yamaguchi University, Yamaguti, Yamaguchi, Japan
IEE Proceedings - Electric Power Applications (Impact Factor: 1.26). 08/2002; 149(4):275 - 282. DOI: 10.1049/ip-epa:20020257
Source: IEEE Xplore

ABSTRACT An effective system control method is presented for applying a
three-phase current-source PWM convertor with a deadbeat controller to
active power filters (APFs). In the shunt-type configuration, the APF is
controlled such that the current drawn by the APF from the utility is
equal to the current harmonics and reactive current required for the
load. To attain the time-optimal response of the APF supply current, a
two-dimensional deadbeat control scheme is applied to APF current
control. To cancel both the delay in the two-dimensional deadbeat
control scheme and the delay in DSP control strategy, an adaptive line
enhancer (ALE) is introduced in order to predict the desired value of
three sampling periods ahead. The ALE also brings robustness to the
deadbeat control system. Owing to the ALE being in a transient state,
the settling time is short. By comparison in a steady state, the total
harmonic distortion ratio of source currents can be reduced as much as
possible compared to the case that ideal identification of a controlled
system could be made. The experimental results obtained from a DSP-based
APE are also reported. The compensating ability of this APF is very high
in accuracy and responsiveness, although the modulation frequency is
rather low

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    • "La corriente de referencia se compone de las componentes que se pretenden eliminar de la corriente de la carga, las cuales deben ser inyectadas en contrafase en el punto de conexión común y, además, esta corriente incluye una pequeña componente de corriente activa para mantener la tensión de continua o, lo que es lo mismo, para restituir las pérdidas del filtro [6] y mantener su capacidad de compensación. Las prestaciones del filtro dependen en gran medida del método empleado para obtener la corriente de referencia en tiempo real. "
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    ABSTRACT: Non-linear electrical loads connected to power systems introduce non-active power components. The current harmonics and reactive power deteriorate the power quality and reduce the electrical system efficiency. These non-desirable effects can be avoided by using shunt active power filtering. This is a relevant topic in electrical and power electronics systems and, as a consequence, it must be included in undergraduate engineering courses. The aim of this paper is to present a laboratory set-up of a three-phase three-wire shunt active power filter (SAPF) which allows undergraduate and postgraduate engineering students to evaluate experimentally the performance of different control algorithms in SAPFs. As an example a complete didactic application is described using the developed laboratory set-up.
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    • "For this purpose , artificial neural networks and deadbeat control have been applied to the compensation schemes to reduce the delay time. However, a neutral network requires a learning process in advance [13] and deadbeat control is subject to system parameter perturbation [14]. "
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    ABSTRACT: In this paper, a novel control scheme compensating for source voltage unbalance and current harmonics in series-type active power filter systems combined with shunt passive filters is proposed, which focuses on reducing the delay time effect required to generate the reference voltage. Using digital all-pass filters, the positive voltage sequence component out of the unbalanced source voltage is derived. The all-pass filter can give a desired phase shift and no magnitude reduction, unlike conventional low-or high-pass filters. Based on this positive-sequence component, the source phase angle and the reference voltage for compensation are derived. This method is easier to implement and to tune controller gains. In order to reduce the delay time effect in the voltage control loop, the reference voltage is predicted a sampling period ahead. The validity of the proposed control scheme has been verified by experimental results.
    IEEE Transactions on Industrial Electronics 03/2004; 51(1-51):132 - 139. DOI:10.1109/TIE.2003.822040 · 6.50 Impact Factor
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    ABSTRACT: This paper discussed the principle and filtering characteristics of hybrid active power filters (HAPF) using a combined control method. From the single-phase equivalent model of HAPF, a fast current tracking control is necessitated for harmonic compensation current and periodic disturbances. In order to decrease the tracking error and to improve dynamic response of HAPF, a fuzzy proportional repetitive controller was proposed based on internal model principle. The controller can also suppress non-periodic disturbances and has well adaptability in case of the severe fluctuation of the loads. The steady state and dynamic experiment waveforms were gotten in a laboratory prototype, rated at 10 kVA. Experiment results proved the feasibility and validity of the novel control strategies.
    01/2007; DOI:10.1109/IECON.2007.4460149
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