Results 21 to 30 of about 3,457,300 (349)
Fast single-end line protection method for the meshed multi-terminal HVDC grid
The Journal of Engineering, 2019 In view of the short-circuit fault characteristics, the protection technique of the dc lines limits the development of the modular multi-level converter (MMC)-based HVDC grid in a large extent. This study derives the calculation formulas of the transient
Qiang Huang +4 more
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Internal faults in power transformers
IET Electric Power Applications, 2007 The paper deals with internal faults in large power transformers. The explanation of such faults is followed by the description of an analytical method proposed for the calculation of the power flow during an interturn fault, including the current supplied by the power grid, the current in a group of short-circuited turns and the current in the spot of
M. Jabloński, E. Napieralska-Juszczak
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ROCOV scheme for Fault Detection and Location in HVDC sytems [PDF]
, 2019 A reliable DC fault protection system is essential for the development of HVDC grids. Therefore, this paper deals with the voltage derivative ROCOV scheme to locate and detect DC faults.
Abarrategi, O. +4 more
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Novel protection method for VSC-HVDC transmission lines
The Journal of Engineering, 2019 The large shunt capacitances on both sides of VSC-HVDC transmission line will block and reflect the travelling waves when a fault occurs on DC cable lines.
Lingtong Jiang +5 more
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Analysis and Protection Scheme of Station Internal AC Grounding Faults in a Bipolar MMC-HVDC System
IEEE Access, 2020 The symmetrical bipolar configuration shows a great advantage in modular multilevel converter (MMC) based high-voltage dc-current (HVDC) transmission. In a bipolar MMC-HVDC system, station internal ac grounding faults cause sub-module (SM) capacitors to ...
Shimin Xue +3 more
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, 2009 Steven Spielberg's 1989 film Always represents one of the director's few critical and commercial disappointments. This paper examines the extent to which the film's failures are attributable to its formal, stylistic, and narrative features.
Bettinson, Gary
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Internal representation of a process, fault diagnosis and fault correction [PDF]
Ergonomics, 1979 This paper reports on an investigation into the relationship between the internal representation of a process on the one hand and on the other, control behaviour when diagnosing and correcting faults. The subjects were 87 process operator trainees, performing certain tasks in a simulated process control situation.
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Voltage pole-wave protection scheme for multi-terminal DC grid
The Journal of Engineering, 2019 With the rapid development of flexible DC transmission and multi-terminal high voltage direct current transmission (HVDC) (MTDC) grid, the protection schemes of flexible DC transmission lines are still the traditional methods, which do not achieve the ...
Zhongrun Xie +4 more
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IET Science, Measurement & Technology, 2021 A precise simulation of the internal faults of synchronous generators is very important for designing the main protection scheme; therefore, it is necessary to propose an accurate model.
Shiyong Xiao +3 more
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Integrating testing techniques through process programming [PDF]
, 1989 Integration of multiple testing techniques is required to demonstrate high quality of software. Technique integration has three basic goals: incremental testing capabilities, extensive error detection, and cost-effective application. We are experimenting
Clarke Lori A. +5 more
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