The Experts below are selected from a list of 14274 Experts worldwide ranked by ideXlab platform

O.p. Malik - One of the best experts on this subject based on the ideXlab platform.

  • real time implementation of a hybrid Protection scheme for bipolar hvdc line using fpga
    IEEE Transactions on Power Delivery, 2011
    Co-Authors: Xiaolei Liu, A H Osman, O.p. Malik
    Abstract:

    A hybrid Protection scheme for bipolar HVDC line has been implemented with field-programmable gate array (FPGA) and evaluation of its performance in real time is described in this paper. The Protection scheme amalgamates a traveling wave Protection unit, a Boundary Protection unit, and a lightning unit. A stationary wavelet transform (SWT) and its wavelet modulus maxima are used to remove noise and represent a useful traveling wave signal. Boundary Protection based on SWT is used jointly with traveling wave Protection to distinguish internal faults from external faults. The lightning unit is used to distinguish non-fault transients and to identify the faulty pole. Xilinx XtremeDSP Development Kit-4 is employed for the hardware implementation, with coding done using the Xilinx System Generator and AccelDSP. The cost-efficient hardware co-simulation approach is adopted here to evaluate the real-time performance of the Protection scheme.

  • correction to hybrid traveling wave Boundary Protection for monopolar hvdc line apr 09 569 578
    IEEE Transactions on Power Delivery, 2009
    Co-Authors: Xiaolei Liu, A H Osman, O.p. Malik
    Abstract:

    In the above titled paper (ibid., vol. 24, no. 2, pp. 569-578), there was an error in equation (2). The corrected equation and other corrections are presented here.

  • hybrid traveling wave Boundary Protection for monopolar hvdc line
    IEEE Transactions on Power Delivery, 2009
    Co-Authors: Xiaolei Liu, A H Osman, O.p. Malik
    Abstract:

    A novel hybrid Protection algorithm, based on traveling wave Protection principle and Boundary Protection principle for a monopolar HVDC line is proposed. Stationary wavelet transform (SWT) is adopted in the traveling wave Protection to process the dc signal and then wavelet modulus maxima are used to further represent the useful traveling wave signal. The Boundary Protection principle based on SWT is used jointly with traveling wave Protection to distinguish internal faults from external faults. The effect of border distortion, noise, high ground fault resistance, close-up faults, transients caused by lightning strokes and different dc line terminations are considered in the paper.

Xiaolei Liu - One of the best experts on this subject based on the ideXlab platform.

  • real time implementation of a hybrid Protection scheme for bipolar hvdc line using fpga
    IEEE Transactions on Power Delivery, 2011
    Co-Authors: Xiaolei Liu, A H Osman, O.p. Malik
    Abstract:

    A hybrid Protection scheme for bipolar HVDC line has been implemented with field-programmable gate array (FPGA) and evaluation of its performance in real time is described in this paper. The Protection scheme amalgamates a traveling wave Protection unit, a Boundary Protection unit, and a lightning unit. A stationary wavelet transform (SWT) and its wavelet modulus maxima are used to remove noise and represent a useful traveling wave signal. Boundary Protection based on SWT is used jointly with traveling wave Protection to distinguish internal faults from external faults. The lightning unit is used to distinguish non-fault transients and to identify the faulty pole. Xilinx XtremeDSP Development Kit-4 is employed for the hardware implementation, with coding done using the Xilinx System Generator and AccelDSP. The cost-efficient hardware co-simulation approach is adopted here to evaluate the real-time performance of the Protection scheme.

  • correction to hybrid traveling wave Boundary Protection for monopolar hvdc line apr 09 569 578
    IEEE Transactions on Power Delivery, 2009
    Co-Authors: Xiaolei Liu, A H Osman, O.p. Malik
    Abstract:

    In the above titled paper (ibid., vol. 24, no. 2, pp. 569-578), there was an error in equation (2). The corrected equation and other corrections are presented here.

  • hybrid traveling wave Boundary Protection for monopolar hvdc line
    IEEE Transactions on Power Delivery, 2009
    Co-Authors: Xiaolei Liu, A H Osman, O.p. Malik
    Abstract:

    A novel hybrid Protection algorithm, based on traveling wave Protection principle and Boundary Protection principle for a monopolar HVDC line is proposed. Stationary wavelet transform (SWT) is adopted in the traveling wave Protection to process the dc signal and then wavelet modulus maxima are used to further represent the useful traveling wave signal. The Boundary Protection principle based on SWT is used jointly with traveling wave Protection to distinguish internal faults from external faults. The effect of border distortion, noise, high ground fault resistance, close-up faults, transients caused by lightning strokes and different dc line terminations are considered in the paper.

A H Osman - One of the best experts on this subject based on the ideXlab platform.

  • real time implementation of a hybrid Protection scheme for bipolar hvdc line using fpga
    IEEE Transactions on Power Delivery, 2011
    Co-Authors: Xiaolei Liu, A H Osman, O.p. Malik
    Abstract:

    A hybrid Protection scheme for bipolar HVDC line has been implemented with field-programmable gate array (FPGA) and evaluation of its performance in real time is described in this paper. The Protection scheme amalgamates a traveling wave Protection unit, a Boundary Protection unit, and a lightning unit. A stationary wavelet transform (SWT) and its wavelet modulus maxima are used to remove noise and represent a useful traveling wave signal. Boundary Protection based on SWT is used jointly with traveling wave Protection to distinguish internal faults from external faults. The lightning unit is used to distinguish non-fault transients and to identify the faulty pole. Xilinx XtremeDSP Development Kit-4 is employed for the hardware implementation, with coding done using the Xilinx System Generator and AccelDSP. The cost-efficient hardware co-simulation approach is adopted here to evaluate the real-time performance of the Protection scheme.

  • correction to hybrid traveling wave Boundary Protection for monopolar hvdc line apr 09 569 578
    IEEE Transactions on Power Delivery, 2009
    Co-Authors: Xiaolei Liu, A H Osman, O.p. Malik
    Abstract:

    In the above titled paper (ibid., vol. 24, no. 2, pp. 569-578), there was an error in equation (2). The corrected equation and other corrections are presented here.

  • hybrid traveling wave Boundary Protection for monopolar hvdc line
    IEEE Transactions on Power Delivery, 2009
    Co-Authors: Xiaolei Liu, A H Osman, O.p. Malik
    Abstract:

    A novel hybrid Protection algorithm, based on traveling wave Protection principle and Boundary Protection principle for a monopolar HVDC line is proposed. Stationary wavelet transform (SWT) is adopted in the traveling wave Protection to process the dc signal and then wavelet modulus maxima are used to further represent the useful traveling wave signal. The Boundary Protection principle based on SWT is used jointly with traveling wave Protection to distinguish internal faults from external faults. The effect of border distortion, noise, high ground fault resistance, close-up faults, transients caused by lightning strokes and different dc line terminations are considered in the paper.

Jinyu Wen - One of the best experts on this subject based on the ideXlab platform.

  • DC Fault Protection Algorithms of MMC-HVDC Grids: Fault Analysis, Methodologies, Experimental Validations, and Future Trends
    IEEE Transactions on Power Electronics, 2021
    Co-Authors: Wang Xiang, Saizhao Yang, Grain Philip Adam, Haobo Zhang, Wenping Zuo, Jinyu Wen
    Abstract:

    To protect the converters and minimize the power transmission interruption during dc line faults, it is necessary to detect the faults at ultra high speed for the modular multilevel converter (MMC)-based HVdc grids. This article reviews the state-of-the-art of dc fault Protection methods of MMC-HVdc grids, and summarizes the underlying principles of each method. On this basis, the dc fault characteristics analysis in terms of modal-domain, time-domain, and frequency-domain are analyzed, which direct the Protection design. Typical Boundary Protection and nonBoundary Protection schemes are reviewed. The advantages and disadvantages of existing fault Protection methods are compared. A two-terminal MMC-HVdc prototype is developed to test the effectiveness of three fault Protection methods. Comprehensive quantitative assessments of the Protection methods discussed above are carried out in a four-terminal MMC-HVdc grid. Finally, the future trends of the Protection schemes are discussed and the findings are concluded.

Giancarlo Fortino - One of the best experts on this subject based on the ideXlab platform.

  • An Adaptive Trust Boundary Protection for IIoT Networks Using Deep-Learning Feature-Extraction-Based Semisupervised Model
    IEEE Transactions on Industrial Informatics, 2021
    Co-Authors: Mohammad Mehedi Hassan, Shamsul Huda, Shaila Sharmeen, Jemal Abawajy, Giancarlo Fortino
    Abstract:

    The rapid development of Internet of Things (IoT) platforms provides the industrial domain with many critical solutions, such as joint venture virtual production systems. However, the extensive interconnection of industrial systems with corporate systems in industrial Internet of Things (IIoT) networks exposes the industrial domain to severe cyber risks. Because of many proprietary multilevel protocols, limited upgrade opportunities, heterogeneous communication infrastructures, and a very large trust Boundary, conventional IT security fails to prevent cyberattacks against IIoT networks. Recent secure protocols, such as secure distributed network protocol (DNP 3.0), are limited to weak hash functions for critical response time requirements. As a complementary, we propose an adaptive trust Boundary Protection for IIoT networks using a deep-learning, feature-extraction-based semisupervised model. Our proposed approach is novel in that it is compatible with multilevel protocols of IIoT. The proposed approach does not require any manual effort to update the attack databases and can learn the rapidly changing natures of unknown attack models using unsupervised learnings and unlabeled data from the wild. Therefore, the proposed approach is resilient to emerging cyberattacks and their dynamic nature. The proposed approach has been verified using a real IIoT testbed. Extensive experimental analysis of the attack models and results shows that the proposed approach significantly improves the identification of attacks over conventional security control techniques.