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Victo C M Leung - One of the best experts on this subject based on the ideXlab platform.

  • Cable diagnostics with power line modems for smart grid monitoring
    IEEE Access, 2019
    Co-Authors: Yinjia Huo, Gautham Prasad, Laza Atanackovic, Lutz Lampe, Victo C M Leung
    Abstract:

    Remote monitoring of Electrical Cable conditions is an essential characteristic of the next-generation smart grid, which features the ability to consistently surveil and control the grid infrastructure. In this paper, we propose a technique that harnesses power line modems (PLMs) for monitoring Cable health. We envisage that all or most of these PLMs have already been deployed for data communication purposes and focus on the distribution grid or neighborhood area networks in the smart grid. For such a setting, we propose a machine learning (ML)-based framework for automatic Cable diagnostics by continuously monitoring the Cable status to identify, assess, and locate possible degradations. As part of our technique, we also synthesize the state-of-the-art reflectometry methods within the PLMs to extract beneficial features for the effective performance of our proposed ML solution. The simulation results demonstrate the effectiveness of our solution under different aging conditions and varying load configurations. Finally, we reflect on our proposed diagnostics method by evaluating its robustness and comparing it with existing alternatives.

  • Cable diagnostics with power line modems for smart grid monitoring
    arXiv: Signal Processing, 2018
    Co-Authors: Yinjia Huo, Gautham Prasad, Laza Atanackovic, Lutz Lampe, Victo C M Leung
    Abstract:

    Remote monitoring of Electrical Cable conditions is an essential characteristic of the next-generation smart grid, which features the ability to consistently surveil and control the grid infrastructure. In this paper, we propose a technique that harnesses power line modems (PLMs) as sensors for monitoring Cable health. We envisage that all or most of these PLMs have already been deployed for data communication purposes and focus on the distribution grid or neighborhood area networks in the smart grid. For such a setting, we propose a machine learning (ML) based framework for automatic Cable diagnostics by continuously monitoring the Cable status to identify, assess, and locate possible degradations. As part of our technique, we also synthesize state-of-the-art reflectometry methods within the PLMs to extract beneficial features for effective performance of our proposed ML solution. Simulation results demonstrate the effectiveness of our solution under different aging conditions and varying load configurations. Finally, we reflect on our proposed diagnostics method by evaluating its robustness and comparing it with existing alternatives.

Yinjia Huo - One of the best experts on this subject based on the ideXlab platform.

  • Cable diagnostics with power line modems for smart grid monitoring
    IEEE Access, 2019
    Co-Authors: Yinjia Huo, Gautham Prasad, Laza Atanackovic, Lutz Lampe, Victo C M Leung
    Abstract:

    Remote monitoring of Electrical Cable conditions is an essential characteristic of the next-generation smart grid, which features the ability to consistently surveil and control the grid infrastructure. In this paper, we propose a technique that harnesses power line modems (PLMs) for monitoring Cable health. We envisage that all or most of these PLMs have already been deployed for data communication purposes and focus on the distribution grid or neighborhood area networks in the smart grid. For such a setting, we propose a machine learning (ML)-based framework for automatic Cable diagnostics by continuously monitoring the Cable status to identify, assess, and locate possible degradations. As part of our technique, we also synthesize the state-of-the-art reflectometry methods within the PLMs to extract beneficial features for the effective performance of our proposed ML solution. The simulation results demonstrate the effectiveness of our solution under different aging conditions and varying load configurations. Finally, we reflect on our proposed diagnostics method by evaluating its robustness and comparing it with existing alternatives.

  • Cable diagnostics with power line modems for smart grid monitoring
    arXiv: Signal Processing, 2018
    Co-Authors: Yinjia Huo, Gautham Prasad, Laza Atanackovic, Lutz Lampe, Victo C M Leung
    Abstract:

    Remote monitoring of Electrical Cable conditions is an essential characteristic of the next-generation smart grid, which features the ability to consistently surveil and control the grid infrastructure. In this paper, we propose a technique that harnesses power line modems (PLMs) as sensors for monitoring Cable health. We envisage that all or most of these PLMs have already been deployed for data communication purposes and focus on the distribution grid or neighborhood area networks in the smart grid. For such a setting, we propose a machine learning (ML) based framework for automatic Cable diagnostics by continuously monitoring the Cable status to identify, assess, and locate possible degradations. As part of our technique, we also synthesize state-of-the-art reflectometry methods within the PLMs to extract beneficial features for effective performance of our proposed ML solution. Simulation results demonstrate the effectiveness of our solution under different aging conditions and varying load configurations. Finally, we reflect on our proposed diagnostics method by evaluating its robustness and comparing it with existing alternatives.

Shamass R - One of the best experts on this subject based on the ideXlab platform.

  • Modelling post-tensioned precast concrete segmental girder bridges with dry keyed joints – preliminary results
    2016
    Co-Authors: Sejkati E, Zhou X, Mancini M, Shamass R
    Abstract:

    Precast concrete segmental bridges (PCSBs) have been the most common design technology used in the last decades. It is widely recognized that segmental bridges have better durability, lower life-cycle costs and higher quality for maintenance than other types of bridges. PCSBs with externally prestressed tendons have become very popular in construction because of economical and safety reasons, fast and practical construction, and outstanding serviceability. Moreover, external tendons technique is widely used because it allows to inspect the Cables and to replace them or to reinforce the tendons in case of damage while such kinds of actions are difficult to be taken in case of internal prestressing. Therefore, box section is the most common solution due to its aesthetic appeal and elegance that reduces the environmental impact as well due to the convenient maintenance for the tendons. Besides, the hollow concrete box segment can be used for service/Electrical Cable ducts for bridges. However, there is lack of reliable computational model for analysing behaviour of post-tensioned PCSBs. This research investigates the behaviour of PCSBs with dry keyed joints and external tendons up to failure with the use of finite element method which is validated by comparing experimental results. Deflection, joint opening, tendon slip, stresses of the tendons and the concrete are obtained from numerical analysis with recommendation on further development towards a more accurate numerical model for PCSBs made

  • Modelling Post-tensioned Precast Concrete Segmental Girder Bridges with Keyed Joints – Preliminary Results
    Springer Verlag, 2016
    Co-Authors: Sejkati E, Zhou X, Shamass R, Mancini G
    Abstract:

    Precast concrete segmental bridges (PCSBs) have been the most common design technology used in the last decades. It is widely recognized that segmental bridges have better durability, lower life-cycle costs and higher quality for maintenance than other types of bridges. PCSBs with externally prestressed tendons have become very popular in construction because of economical and safety reasons, fast and practical construction, and outstanding serviceability. Moreover, external tendons technique is widely used because it allows to inspect the Cables and to replace them or to reinforce the tendons in case of damage while such kinds of actions are difficult to be taken in case of internal prestressing. Therefore, box section is the most common solution due to its aesthetic appeal and elegance that reduces the environmental impact as well due to the convenient maintenance for the tendons. Besides, the hollow concrete box segment can be used for service/Electrical Cable ducts for bridges. However, there is lack of reliable computational model for analysing behaviour of post-tensioned PCSBs. This research investigates the behaviour of PCSBs with dry keyed joints and external tendons up to failure with the use of finite element method which is validated by comparing experimental results. Deflection, joint opening, tendon slip, stresses of the tendons and the concrete are obtained from numerical analysis with recommendation on further development towards a more accurate numerical model for PCSBs made

Sejkati E - One of the best experts on this subject based on the ideXlab platform.

  • Modelling post-tensioned precast concrete segmental girder bridges with dry keyed joints – preliminary results
    2016
    Co-Authors: Sejkati E, Zhou X, Mancini M, Shamass R
    Abstract:

    Precast concrete segmental bridges (PCSBs) have been the most common design technology used in the last decades. It is widely recognized that segmental bridges have better durability, lower life-cycle costs and higher quality for maintenance than other types of bridges. PCSBs with externally prestressed tendons have become very popular in construction because of economical and safety reasons, fast and practical construction, and outstanding serviceability. Moreover, external tendons technique is widely used because it allows to inspect the Cables and to replace them or to reinforce the tendons in case of damage while such kinds of actions are difficult to be taken in case of internal prestressing. Therefore, box section is the most common solution due to its aesthetic appeal and elegance that reduces the environmental impact as well due to the convenient maintenance for the tendons. Besides, the hollow concrete box segment can be used for service/Electrical Cable ducts for bridges. However, there is lack of reliable computational model for analysing behaviour of post-tensioned PCSBs. This research investigates the behaviour of PCSBs with dry keyed joints and external tendons up to failure with the use of finite element method which is validated by comparing experimental results. Deflection, joint opening, tendon slip, stresses of the tendons and the concrete are obtained from numerical analysis with recommendation on further development towards a more accurate numerical model for PCSBs made

  • Modelling Post-tensioned Precast Concrete Segmental Girder Bridges with Keyed Joints – Preliminary Results
    Springer Verlag, 2016
    Co-Authors: Sejkati E, Zhou X, Shamass R, Mancini G
    Abstract:

    Precast concrete segmental bridges (PCSBs) have been the most common design technology used in the last decades. It is widely recognized that segmental bridges have better durability, lower life-cycle costs and higher quality for maintenance than other types of bridges. PCSBs with externally prestressed tendons have become very popular in construction because of economical and safety reasons, fast and practical construction, and outstanding serviceability. Moreover, external tendons technique is widely used because it allows to inspect the Cables and to replace them or to reinforce the tendons in case of damage while such kinds of actions are difficult to be taken in case of internal prestressing. Therefore, box section is the most common solution due to its aesthetic appeal and elegance that reduces the environmental impact as well due to the convenient maintenance for the tendons. Besides, the hollow concrete box segment can be used for service/Electrical Cable ducts for bridges. However, there is lack of reliable computational model for analysing behaviour of post-tensioned PCSBs. This research investigates the behaviour of PCSBs with dry keyed joints and external tendons up to failure with the use of finite element method which is validated by comparing experimental results. Deflection, joint opening, tendon slip, stresses of the tendons and the concrete are obtained from numerical analysis with recommendation on further development towards a more accurate numerical model for PCSBs made

Youji Tao - One of the best experts on this subject based on the ideXlab platform.

  • enhanced fire retardancy of poly ethylene vinyl acetate Electrical Cable coatings containing microencapsulated ammonium polyphosphate as intumescent flame retardant
    RSC Advances, 2016
    Co-Authors: Yan Zhang, Bibo Wang, Haibo Sheng, Bihe Yuan, Gang Tang, Ganxin Jie, Hao Feng, Youji Tao
    Abstract:

    There is a need to improve and maintain the protection function of ethylene-vinyl acetate copolymer (EVA) Cable materials from ageing degradation to avoid fire hazards and extend their service lives. Here, a flame retardant, branched silane precursor, pentaerythritol triacrylate-(3-aminopropyl) triethoxysilane (PETA-APTS), containing a vinyl group and hydrolysable silane structure was successfully synthesized and characterized, and it was used to prepare microencapsulated ammonium polyphosphate (MCAPP) particles with tetraethoxy silane via a successive Stober method, which aimed to immobilize the MCAPP into the EVA matrix through a crosslinking treatment. Damp-heat ageing tests (85 °C, 85% R.H.) were carried out on the EVA/APP (EVA-1 system) and EVA/MCAPP (EVA-2 system) to explore the protective effect of the microencapsulation method over 6 weeks. Digital photos, SEM images, gel-content tests and X-ray photoelectron spectroscopy results showed that the MCAPP particles had excellent compatibility with the EVA matrix and did not migrate or eroded with water vapor at 85 °C. Remarkably, this phenomenon led to great improvements in the mechanical properties, Electrical insulation performance and fire safety for the EVA-2 system compared to the EVA-1 system. This investigation provided a formulation for the industrial application of the EVA/IFR Cable as an insulated material with excellent long-term stability and fire safety.