Research on Synchronverter-Based Regenerative Braking Energy Feedback System of Urban Rail Transit

Li, Shuting; Wu, Shengde; Xiang, Shiqiang; Zhang, Yabo; Guerrero, Josep M.; Vasquez, Juan C.

doi:10.3390/en13174418

Cited by 8 publications

(4 citation statements)

References 33 publications

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“…Most of the existing construction monitoring systems focus on solving the problems of data organization and business process, lack of association with other information in construction, and do not put forward the complete process of data input, calculation, display, early warning, message push, early warning processing and so on [2,3].The main problems are:…”

Section: Fig 11 Integration Of Bim and Gismentioning

confidence: 99%

Design and Research on the Intelligent System of Urban Rail Transit Project based on BIM+GIS

Liu¹,

Shah

Pljonkin

et al. 2021

SCPE

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Building Information Modeling (BIM) technology has been widely used in the construction industry, especially in the field of civil construction. BIM standards, basic software and management platforms are relatively mature. The urban rail transit projects are linear projects, they not only span long lines, multiple regions, involve multiple disciplines, and are difficult to coordinate, but also have complex surrounding environments and high safety requirements. Therefore, their needs for integrated construction and operation applications are more concentrated. In order to solve the problems of data isolation, single display form, abnormal situation notification and delayed processing in urban rail transit construction monitoring, combined with GIS+BIM technology, a complete set of construction monitoring information management process and data organization plan is proposed, and the development is oriented. The construction monitoring system of project construction management focuses on solving the problems of the integration, display, early warning and secondary early warning of construction monitoring data. The system realizes the functions of input, storage, processing, three-dimensional display and early warning of measuring point information and daily measurement information. It is integrated with the GIS+BIM management and control platform, and the project is carried out in the construction project of Qingdao Rail Transit Line 8. Application, interact with functions such as model browsing, schedule control, engineering quantity management, video monitoring, etc., to improve the management efficiency and safety quality level of on-site construction.The mainstream GIS and BIM data based research on construction monitoring data standards promote the in-depth integration of construction monitoring data and improve the data entry and association efficiency.

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Section: Fig 11 Integration Of Bim and Gismentioning

confidence: 99%

Design and Research on the Intelligent System of Urban Rail Transit Project based on BIM+GIS

Liu¹,

Shah

Pljonkin

et al. 2021

SCPE

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“…For instance, synchronverters' robust stability is investigated in [5]. The synchronverter concept is also employed for various applications to control rectifiers as synchronous motors [6], control HVDC transmission systems [7], and operate as active shunt filters that provide a path for selected harmonics [8]. The synchronverter's controller makes an IIDG imitate the SG behavior.…”

Section: Introductionmentioning

confidence: 99%

Optimal Protection Coordination of Active Distribution Networks With Synchronverters

Pola

Azzouz

2022

IEEE Access

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Synchronverters are inverters imitating synchronous generators (SGs) to curb adverse impacts of traditional inverters on power networks. However, synchronverters may generate unlimited currents during faults. In addition, limiting the synchronverter's fault currents by hard limiters could malfunction directional overcurrent relays (DOCRs). Thus, this paper employs virtual-impedance fault current limiters (VI-FCLs) that preserve the synchronverter's voltage source model to guarantee a reliable operation of DOCRs. Also, an optimal protection coordination (OPC) scheme is developed to size the VI-FCLs and determine the DOCRs' settings in a decoupled manner. The proposed protection scheme determines the highest values of the VI-FCLs that correspond to bolted faults at the synchronverters' terminals. These conservative values are then relaxed by adaptively varying the VI-FCL based on the fault severity to enhance the DOCR sensitivity. Further, a short circuit calculation algorithm is formulated to incorporate the developed synchronverter with VI-FCL into an OPC program to determine the optimal settings of DOCRs that minimize the total operating time of all primary and backup relays. Case studies ensure the proposed protection scheme's effectiveness in reliably protecting a radial 9-bus Canadian distribution system and a meshed 14-bus system powered by synchronverters.

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“…A large number of surveillance cameras are installed within the station area for subway operation and public security monitoring. Such a video monitoring system has almost become a tool to provide post-evidence recording and has lost the ability to prevent or stop criminal activities from occurring [1]. Urban rail transit has small space and large passenger flow, so safe operation is always the most concerning thing for government departments, operating units, and public security organs.…”

Section: Introductionmentioning

confidence: 99%

Design and Study of Urban Rail Transit Security System Based on Face Recognition Technology

Guo

Xiao

Alroobaea

et al. 2022

IJCAI

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In the modern world, it is difficult to prevent terrorism due to the relatively closed environment, dense personnel, large passenger flow, long line and wide coverage of urban rail transit. Identity recognition is a core element of security. The design and study of an urban rail transit security system based on face recognition technology are proposed in this paper. Through the study on the face recognition algorithm of intelligent security systems in urban rail transit, the related introduction of face recognition technology is done. The analysis of the main mode of face recognition is carried out utilizing the practical application design ideas. The results by experimental analysis show that if FAR is set to a very low range (such as 0.1% or even 0.01%) meanwhile FRR can reach a very low level (such as less than 1%). Such a system has practical value and otherwise, it may face a large number of passenger affairs and complaints to be handled. When FAR is set to 0.1% and N is 1.6 million, FRR can reach 2.1%. However, according to the test, when the picture quality deteriorates (during image captured by a webcam), the FRR will increase by 2 to 3 times. If a Webcam is used for recognition in Mugshot, the lowest FRR of the three top algorithms is only 5.21%.Povzetek: Tehnologija prepoznavanja obrazov je uporabljena za nadzor osumljencev -teroristov na vlakih.

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Research on Synchronverter-Based Regenerative Braking Energy Feedback System of Urban Rail Transit

Cited by 8 publications

References 33 publications

Design and Research on the Intelligent System of Urban Rail Transit Project based on BIM+GIS

Design and Research on the Intelligent System of Urban Rail Transit Project based on BIM+GIS

Optimal Protection Coordination of Active Distribution Networks With Synchronverters

Design and Study of Urban Rail Transit Security System Based on Face Recognition Technology

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