Distortion-Free Saturators for Power Converters Under Unbalanced Conditions

Rizo, Mario; Liserre, Marco; Bueno, Emilio; Rodríguez, Francisco; Rodrı́guez, Ana

doi:10.1109/tpel.2014.2329452

Cited by 23 publications

(13 citation statements)

References 39 publications

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“…It must be remarked that (11) does not need to be computed; the parallel implementation, (9) and (10), being used instead. Finally, the fraction of saturation voltage corresponding to each parallel controller must be calculated (14).…”

Section: B Efficient Implementationmentioning

confidence: 99%

“…However, this does not imply a correct harmonic compensation during the saturated state. As it was described in the introduction, several researchers [13], [14], [15], [16] have dealt with the problem of harmonic distortion during saturation. The use of the realizable references technique will further simplify the introduction of compensation mechanisms but the harmonic distortion will depend on the selection of the saturated complex vector.…”

Section: Saturation Strategiesmentioning

confidence: 99%

“…Along with the windup problem, saturation also produces harmonic distortion. A trajectory analyzer is proposed in [13], [14] to limit the controller output in case of saturation and avoid harmonic injection. This analyzer is used to adapt the output voltage in stationary reference frame.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Realizable References Anti-Windup Implementation for Parallel Controllers in Multiple Reference Frames

Guerrero

Gonzalez-Moral

Fernández

et al. 2018

2018 IEEE Energy Conversion Congress and Exposition (ECCE)

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Parallel controller structures are often used for the control of harmonic components in those power converters including harmonic compensation functions. The harmonic compensation can be distorted during saturation of the power converter output. This paper proposes an implementation of the realizable references anti-windup technique suitable for parallel controllers in multiple reference frames. The proposed implementation does not require a particular type of controllers nor special formulations. It allows canceling individual controller outputs during steady-state saturation to improve the waveform quality. Different saturation options are analyzed.

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Section: B Efficient Implementationmentioning

confidence: 99%

Section: Saturation Strategiesmentioning

confidence: 99%

See 1 more Smart Citation

Realizable References Anti-Windup Implementation for Parallel Controllers in Multiple Reference Frames

Guerrero

Gonzalez-Moral

Fernández

et al. 2018

2018 IEEE Energy Conversion Congress and Exposition (ECCE)

View full text Add to dashboard Cite

show abstract

“…In the paper, the use of the distortion-free saturators based on stationary reference frames (SRFs) is proposed. In particular, the saturators proposed in [20]. The SRF saturators reduce the amplitude of the signal while maintaining the original waveform.…”

Section: Stationary Reference Saturatormentioning

confidence: 99%

New Approaches to Circulating Current Controllers for Modular Multilevel Converters

et al. 2017

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In the next years, modular multilevel converters (MMCs) are going to be a next generation multilevel converters for medium to high voltage conversion applications, such as medium voltage motor drives, medium voltage flexible AC transmission systems (FACTS) and high voltage direct current transmission. They provide advantages such as high modularity, availability, low generation of harmonics, etc. However, the circulating current distorts the leg currents and increases the rated current of power devices, which further increases system cost. This paper focuses on analysis and suppression of these currents in a MMC using two algorithms for tracking of harmonics. For this work resonant controllers and repetitive controllers have been selected. Both controllers are analyzed and simulations results are presented. Moreover, the controllers have been tested and validated for a three phase MMC operating as an inverter using a real processing platform based on Zynq by Xilinx and designed to control large multilevel converters and in a real MMC prototype. These results are provided to demonstrate the feasibility of the proposed method.

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“…In [17], using average and second harmonic components of real and reactive powers, grid-connected inverter current references are generated in SYRF to limit the fault current. Distortion-free saturation strategies for a three-phase threewire inverter are proposed in [18] in which the control system is implemented in SYRF while a similar procedure can be used for STRF case. In [19], a hardware-circuit-based hysteresis current control strategy is proposed to limit output currents of three-phase three-wire inverters in which the control system is implemented in SYRF.…”

Section: Introductionmentioning

confidence: 99%

A Current Limiting Strategy to Improve Fault Ride-Through of Inverter Interfaced Autonomous Microgrids

Sadeghkhani

Golshan

Guerrero

et al. 2017

IEEE Trans. Smart Grid

184

120

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Abstract-With high penetration of distributed energy resources (DER), fault management strategy is of great importance for the distribution network operation. The objective of this paper is to propose a current and voltage limiting strategy to enhance fault ride-through (FRT) capability of inverter-based islanded microgrids (MGs) in which the effects of inverter control system and inverter topology (four/three-wire) are considered. A threephase voltage-sourced inverter (VSI) with multi-loop control system implemented in synchronous, stationary, and natural reference frames is employed in this study for both four-and three-wire configurations. The proposed strategy provides high voltage and current quality during overcurrent conditions, which is necessary for sensitive loads. Several time-domain simulation studies are conducted to investigate the FRT capability of the proposed strategy against both asymmetrical and symmetrical faults. Moreover, the proposed method is tested on the CIGRE benchmark microgrid to demonstrate the effectiveness of the proposed limiting strategy.Index Terms-Current control, fault current limiters, fault ride-through (FRT), reference frame, transient response, voltage limit, voltage-sourced inverter (VSI).

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Distortion-Free Saturators for Power Converters Under Unbalanced Conditions

Cited by 23 publications

References 39 publications

Realizable References Anti-Windup Implementation for Parallel Controllers in Multiple Reference Frames

Realizable References Anti-Windup Implementation for Parallel Controllers in Multiple Reference Frames

New Approaches to Circulating Current Controllers for Modular Multilevel Converters

A Current Limiting Strategy to Improve Fault Ride-Through of Inverter Interfaced Autonomous Microgrids

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