Use of a coded voltage signal for cable switching and fault isolation in cabled seafloor observatories

Zhang, Zhifeng; Chen, Yanhu; Li, Dejun; Jin, Bo; Yang, Canjun; Wang, Jun

doi:10.1631/fitee.1601843

Cited by 7 publications

(8 citation statements)

References 13 publications

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“…Supposing that the fault point in case of a fault in the middle of 3 kinds of cable sections, the distance between adjacent PNs is 25 km and the equivalent resistance value of the fault point is assumed 100, 200, 500, and 1k . The equivalent resistance value analysis at the fault was performed according to the simulation calculation contents in (33), and the results are shown in Table 6.…”

Section: Analysis Of Cable Short-circuit Ground-ing High-impedance Fault Between Pn-7 and Pn-8mentioning

confidence: 99%

“…In the CUINs, the current information can be collected by the PMACS and compared with the theoretical simulation results to diagnose whether the constant current remote supply system has faults. When the fault is determined to exist, the SPFE supplied the power for underwater system individually from both terminals, according to (33), the fault location is determined by calculating the shunt loss of the current in the trunk before and after the fault, the simulation results of equivalent resistance values of the fault are shown in Table 6. The simulation results show that the equivalent resistance of the fault obtained by this method is basically the same as the theoretical value.…”

Section: Analysis Of Cable Short-circuit Ground-ing High-impedance Fault Between Pn-7 and Pn-8mentioning

confidence: 99%

“…Chan T. et al designed a constant voltageconstant current (CV-CC) hybrid fault detection system [32] for open-circuit faults in constant voltage remote power supply systems. Zhang Z. et al reviewed the advantages and disadvantages of existing switching methods and proposed a novel active switching method for the network configuration, which provides a way to communicate with the shore station (SS) through an existing power transmission path [33]. Lyu F. et al [34], [35] summarized the typical topology of the CUINs based on the controllability of the electrical switching BU and the power monitoring and control system (PMACS) and communications monitoring and control system (CMACS), with a new method for the open-circuit fault location of the submarine cable proposed by analyzing the weighted least squares status estimation formula of the branching unit (BU) node voltage vector.…”

Section: Introductionmentioning

confidence: 99%

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A Novel Diagnosis and Location Method of Short-Circuit Grounding High-Impedance Fault for a Mesh Topology Constant Current Remote Power Supply System in Cabled Underwater Information Networks

et al. 2019

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Cabled underwater information networks (CUINs) have evolved over the last decade to provide abundant power and broad bandwidth communication to enable marine science. To ensure reliable operation of CUINs, it is essential to have the technology for high-impedance fault diagnosis and isolation with high reliability and accuracy. The short-circuit grounding high-impedance fault status of mesh topology constant current remote supply system was diagnosed by analyzing the variation difference of equivalent current in the Laplace transform domain. Shore power feeding equipment (SPFE) supplied the power for underwater system individually from both terminals, and the fault location was located by calculating the shunt loss of the current in the trunk before and after the fault. Thus, the fault was isolated to maintain normal operation of the rest of the system and improve the reliability of CUINs. According to the established typical mesh topology constant current remote supply system circuit model, the fault location scheme was designed to simulate the faults of the cable sections in the different links in the constant current remote supply system, and the changes of current located at the primary nodes (PNs) in the Laplace transform domain before and after the fault were analyzed. The results show that the equivalent current of each PN changes when a fault occurs in the system, and the location of the fault point can be analyzed by comparing the shunt loss of the current in the trunk before and after the fault. The designed method of short-circuit grounding high-impedance fault diagnosis and location for a constant current remote supply system is suitable for the fault monitoring and judgment of CUINs with high feasibility and practicality. Furthermore, it provides technical support for the resulting effective determination of faults, isolation of faults, protection of equipment, and improvement of the system reliability.INDEX TERMS Cabled underwater information networks (CUINs), constant current, short-circuit grounding high-impedance fault, fault diagnosis, point location, reliability.

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Section: Analysis Of Cable Short-circuit Ground-ing High-impedance Fault Between Pn-7 and Pn-8mentioning

confidence: 99%

Section: Analysis Of Cable Short-circuit Ground-ing High-impedance Fault Between Pn-7 and Pn-8mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Novel Diagnosis and Location Method of Short-Circuit Grounding High-Impedance Fault for a Mesh Topology Constant Current Remote Power Supply System in Cabled Underwater Information Networks

et al. 2019

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“…Currently, the mainstream cable fault diagnosis and processing technology, mainly fiber optic automatic switching protection technology, real-time monitoring of optical power of optical signals in the optical cable, when a fault occurs, the rapid work of the optical path automatically switched to the standby fiber optic cable, in a very short period of time to restore communications, to complete the rapid response to the optical cable failure and timely recovery [7][8]. Fiber optic cable online monitoring system is also widely used, the use of optical time-domain reflectometer and other equipment for long-term monitoring of fiber optic cable operation status to achieve the fiber optic cable failure alarm, analysis, positioning and other functions for the safe and efficient operation of the fiber optic cable network to provide protection [9][10].…”

Section: Introductionmentioning

confidence: 99%

Neural network-based fiber optic cable fault prediction study for power distribution communication network

Zhang,

Yan,

Shen

et al. 2023

Applied Mathematics and Nonlinear Sciences

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As the foundation of communication networks, optical fiber carries huge network traffic, so the prediction of fiber optic cable faults is an important guarantee for the operation of communication networks. Based on the combination of fiber optic system networking technology and network management data, this study constructs an alarm correlation analysis method by using data mining technology to obtain the data set of the fault prediction model for the problem of low fault prediction accuracy of traditional communication networks. The dataset is used to balance the sample data by generating a small number of new samples through the generative adversarial network. The memory-based feature generation convolutional network is proposed to enhance the feature interaction to realize fault prediction in communication networks. The prediction model has a high prediction accuracy of 98.68%, which saves about 160 min for repair work through the application of fiber optic cable fault prediction, which compares well with other models. Fault prediction based on neural networks can provide assistance in the operation and maintenance of distribution communication networks.

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“…Zhang Z. et al reviewed the advantages and disadvantages of existing switching methods and proposed a novel active switching method for network configuration. which provides a way to communicate with the shore station (SS) through an existing power transmission path [25]. Feng et al [26] summarized the typical topology of the CUINs, based on the controllability of the electrical switching BU and the power monitoring and control system (PMACS) and communications monitoring and control system (CMACS), with a new method for high-impedance fault location of the submarine cable proposed by analyzing the weighted least squares status estimation formula of the BU node voltage vector.…”

Section: Introductionmentioning

confidence: 99%

Research on High-Impedance Fault Diagnosis and Location Method for Mesh Topology Constant Current Remote Power Supply System in Cabled Underwater Information Networks

et al. 2019

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Cabled underwater information networks (CUINs) have evolved over the last decade to provide abundant power and broad bandwidth communication to enable marine science. To ensure reliable operation of the CUINs, the technology for high-impedance fault diagnosis and isolation with high reliability and accuracy is essential. In this paper, we review diagnosis and location methods as applied to a constant voltage ring and the tree topology network. A high-impedance fault diagnosis method based on the variation of the sampling voltage in the primary nodes (PNs) for a constant current remote power supply system is proposed. The methods for analyzing the fault voltage with using power monitoring and control system (PMACS) and communications monitoring, control system (CMACS), and hybrid detection with alternating current and direct current are used for research the high-impedance fault location based on the designed fault isolation circuit. In particular, a verification scheme for high-impedance fault location is designed for the CUINs based on the classical mesh topology. Furthermore, high-impedance faults of nodes and submarine cable sections in the trunk cable are simulated, and the variations of leakage voltage are analyzed. By researching the change of leakage voltage before and after the fault occurs, the feasibility and practicability of the diagnosis and location scheme are verified. INDEX TERMS Cabled underwater information networks (CUINs), constant current remote power supply system, high-impedance fault, mesh topology, diagnosis and location.

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Use of a coded voltage signal for cable switching and fault isolation in cabled seafloor observatories

Cited by 7 publications

References 13 publications

A Novel Diagnosis and Location Method of Short-Circuit Grounding High-Impedance Fault for a Mesh Topology Constant Current Remote Power Supply System in Cabled Underwater Information Networks

A Novel Diagnosis and Location Method of Short-Circuit Grounding High-Impedance Fault for a Mesh Topology Constant Current Remote Power Supply System in Cabled Underwater Information Networks

Neural network-based fiber optic cable fault prediction study for power distribution communication network

Research on High-Impedance Fault Diagnosis and Location Method for Mesh Topology Constant Current Remote Power Supply System in Cabled Underwater Information Networks

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