A Railway Power Conditioner Using Direct AC-AC Modular Multilevel Converter

Qin, Futian; Tu, Hao; Gao, Feng

doi:10.1109/sgre46976.2019.9020681

Cited by 7 publications

(3 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Many RPC topologies have been proposed in the literature using the MMC with high compensation capacity. For instance, an RPC based on a full-bridge back-to-back AC/DC/AC MMC and an open-delta (V/V) power transformer is presented in [22], an RPC based on a two-phase three-wire AC/DC/AC MMC and V/V power transformer is presented in [14,23], and an RPC based on an AC/AC MMC [24] and V/V power transformer is presented in [25]. In addition, authors in [26] present a classification of the RPC topologies.…”

Section: V/v Power Transformermentioning

confidence: 99%

Experimental Validation of a Reduced-Scale Rail Power Conditioner Based on Modular Multilevel Converter for AC Railway Power Grids

et al. 2021

View full text Add to dashboard Cite

Rail power conditioner (RPC) has the ability to improve the power quality in AC railway power grids. This power conditioner can increase the loading capacity of traction substations, balance the active power between the feeder load sections, and compensate for reactive power and current harmonics. At present, there is increasing use of multilevel converter topologies, which provide scalability and robust performance under different conditions. In this framework, modular multilevel converter (MMC) is emerging as a prominent solution for medium-voltage applications. Serving that purpose, this paper focuses on the implementation, testing, and validation of a reduced-scale laboratory prototype of a proposed RPC based on an MMC. The developed laboratory prototype, designed to be compact, reliable, and adaptable to multipurpose applications, is presented, highlighting the main control and power circuit boards of the MMC. In addition, MMC parameter design of the filter inductor and submodule capacitor is also explained. Experimental analysis and validation of a reduced-scale prototype RPC based on MMC topology, are provided to verify the power quality improvement in electrified railway power grids. Thus, two experimental case studies are presented: (1) when both of the load sections are unequally loaded; (2) when only one load section is loaded. Experimental results confirm the RPC based on MMC is effective in reducing the harmonic contents, solving the problem of three-phase current imbalance and compensating reactive power.

show abstract

Section: V/v Power Transformermentioning

confidence: 99%

Experimental Validation of a Reduced-Scale Rail Power Conditioner Based on Modular Multilevel Converter for AC Railway Power Grids

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Modular Multilevel Cascade Converters (MMCCs) have lately arisen as the best alternative to interface high-voltage and high-power systems [1]. Its modular and scalable structure, makes this topology a suitable alternative for several applications, such as energy generation systems [2]- [4], high-voltage direct-current (HVDC) transmission systems [5]- [8], high voltage power conditioning [9] and large-scale alternating current (AC) drives [10]- [13]. The Double Star Chopper Cell (DSCC) configuration for AC/DC conversion [5], [8], [14], [15] and the Triple Star Bridge Cell (TSBC) configuration for AC/AC conversion [16]- [19] are the most reported and studied in literature [20].…”

Section: Introductionmentioning

confidence: 99%

Faults in Modular Multilevel Cascade Converters–Part II: Fault Tolerance, Fault Detection and Diagnosis, and System Reconfiguration

Rojas

Jerez

Hackl

et al. 2022

IEEE Open J. Ind. Electron. Soc.

View full text Add to dashboard Cite

Modular Multilevel Cascade Converters (MMCCs) are considered a promising power electronics topology in industry. Their scalability allows to reach (ultra/very) high voltage levels with low harmonic content and high efficiency and makes MMCCs an ideal solution for high-power applications; such as electrical drives, solid-state transformers and high-voltage direct-current (HVDC) transmission systems. However, the high levels of thermal, electrical and mechanical stress on the power electronics devices and the large number of components (e.g. capacitors or semiconductors) make MMCCs prone to faults. Fault detection and diagnosis (FDD) in combination with fault isolation and system reconfiguration techniques, based on cell redundancy, can increase the reliability, availability and safety of MMCCs, which is crucial for their utilization in critical energy applications. This second part of the paper comprehensively surveys: (i) fault tolerance and fault detection & diagnosis (FDD; e.g. expert system, model-or hardware and data-based FDD methods) and (ii) system reconfiguration strategies (e.g. cold-or hot-redundant) for MMCCs. Finally, the state-of-the-art, challenges and future research trends and opportunities towards reliable MMCC-based systems are revealed.

show abstract

“…The complexity of this topology is higher than that of the DSCC configuration, but it enables bipolar operation [17]. The TSBC topology is mainly used in high-power AC drives applications [23]- [25]; particularly in cement or steel mill drives [6], wind energy conversion systems [26], railway power conditioning [27], grid-connected hybrid generation units (combination of solar and wind energy sources) [28] or applications incorporating Battery Energy Storage Systems (BESS) [29].…”

Section: Introductionmentioning

confidence: 99%

Faults in Modular Multilevel Cascade Converters—Part I: Reliability, Failure Mechanisms, and Fault Impact Analysis

Rojas

Jerez

Hackl

et al. 2022

IEEE Open J. Ind. Electron. Soc.

View full text Add to dashboard Cite

Modular Multilevel Cascade Converters (MMCCs) are considered a promising power electronics topology in industry. Their scalability allows to reach (ultra/very) high voltage levels with low harmonic content and high efficiency and makes MMCCs an ideal solution for high-power applications; such as electrical drives, solid-state transformers and high-voltage direct-current (HVDC) transmission systems. However, the high levels of thermal, electrical and mechanical stress on the power electronics devices and the large number of components (e.g. capacitors or semiconductors) make MMCCs prone to faults reducing its reliability. In this first part of the paper, a comprehensive overview of reliability on MMCCs, failure mechanisms and fault impact analysis in MMCCs, including failure rates and fault modes is presented. Also a set of tables which collect all information to easily detect and identify faults in MMCCs is presented.

show abstract

A Railway Power Conditioner Using Direct AC-AC Modular Multilevel Converter

Cited by 7 publications

References 15 publications

Experimental Validation of a Reduced-Scale Rail Power Conditioner Based on Modular Multilevel Converter for AC Railway Power Grids

Experimental Validation of a Reduced-Scale Rail Power Conditioner Based on Modular Multilevel Converter for AC Railway Power Grids

Faults in Modular Multilevel Cascade Converters–Part II: Fault Tolerance, Fault Detection and Diagnosis, and System Reconfiguration

Faults in Modular Multilevel Cascade Converters—Part I: Reliability, Failure Mechanisms, and Fault Impact Analysis

Contact Info

Product

Resources

About