Shunt active filtering of vector current-controlled VSC at a moderate switching frequency

Svensson, J.; Ottersten, Rolf

doi:10.1109/28.793369

Cited by 37 publications

(9 citation statements)

References 8 publications

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“…The method applied in this work is based on delaying the sampled values of i comp,dq with a period T delay = 1 2·f P LL −T c , where f P LL is the fundamental frequency calculated by the PLL, and T c is the control system closed loop response time defined in the previous paragraph. The method is further presented and discussed in [16].…”

Section: Active Filter Design and Controlmentioning

confidence: 99%

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Handling system harmonic propagation in a diesel-electric ship with an active filter

Årdal

Skjong

Molinas

2015

2015 International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles (ESARS)

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Abstract-Harmonic distortion is often a challenge in marine vessel power systems due to the presence of large motor drives containing diode or thyristor rectifiers. Governing standards impose requirements on bus voltage Total Harmonic Distortion (THD) which can be demanding to fulfil. An attractive measure to reduce THD is to use 12-pulse rectifiers, as they are known to cancel the 5 th and the 7 th harmonic. However, the added cost and space of this solution compared with standard 6-pulse rectifiers is significant. This paper proposes to base propulsion motor drives on 6-pulse rectifiers, and mitigate harmonic problems by means of power electronic based active filters. A detailed numeric simulation model is developed for evaluating the performance of the topology. A case study system is defined consisting of two propulsion motor drives and two synchronous generators. The active filter greatly improves the bus voltage THD in all defined simulation cases. The performance is also better than a corresponding system using 12-pulse rectifiers and no active filter.

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Section: Active Filter Design and Controlmentioning

confidence: 99%

“…There are several ways of implementing such feature, see [16] for an overview. A common factor for all methods is that they reduce the transient performance of the active filter, and they must therefore be applied with care.…”

Section: Active Filter Design and Controlmentioning

confidence: 99%

Handling system harmonic propagation in a diesel-electric ship with an active filter

Årdal

Skjong

Molinas

2015

2015 International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles (ESARS)

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“…The interest on Active Power Filters (APF) strategies capable of performing selective harmonic current compensation has increased in the last few years, especially for those applications where the harmonics produced by the loads are slowly varying [1][2][3][4]. Essentially, in the absence of severe dynamic requirements, control accuracy can be increased since the delay of the current control [6] can be compensated and instabilities or interactions [7,8] with possible dynamic components of the load can be reduced.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, it will be shown that this solution has some properties similar to those obtainable with closed-loop synchronous-frame regulators [1][2][3][4]. However, the proposed solution provides a more efficient algorithm, whose complexity is independent on the number of harmonics to be compensated and it features less sensitivity to rounding and quantization effects with a structure that suits very well Digital Signal Processors (DSPs) implementation, even if limited wordlength or fixed point arithmetic are used.…”

Section: Introductionmentioning

confidence: 99%

Generalized Average Model of the Class-E2 DC-DC Resonant converter

Marafão¹,

Mattavelli²,

Buso³

et al. 2024

REP

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This paper proposes selective harmonic current compensation using a closed-loop repetitive controller. The controller is based on measuring the line currents. It performs the compensation of specific harmonics selected by a DCT (Discrete Cosine Transform) digital filter, which is self-adjusted to track utility frequency deviations by means of a Phase Locked Loop (PLL) system. Compared to conventional solutions, this approach allows full compensation of selected harmonics, even if the active filter has limited bandwidth. This method also requires a simpler algorithm than, e.g., the synchronous frame harmonic regulators and its complexity is independent of the number of compensated harmonics. Moreover, it is more appropriate for DSP implementation and less sensitive to rounding and quantization errors when finite word length or fixed-point implementation is required. Simulations and experimental results confirm the theoretical expectations.

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“…However, an analog hysteresis controller is applied to generate switching pulses with the help of a generated source current reference and measured source current to avoid inherent delay of digital current controller. In [7], 4 different control techniques of ShAF are compared at a lower switching frequency of the Voltage Source Converter (VSC). [8] has developed a novel controller based on the Lagrange multiplier optimization technique to generate compensator current reference in DSP.…”

Section: Introductionmentioning

confidence: 99%