Results 11 to 20 of about 17,685 (234)
Dynamic Phasor Modelling of LCC-HVDC System Based on a Practical Project [PDF]
E3S Web of Conferences, 2021 This paper presents a detailed dynamic phasor modeling process of a line-commutated converter-based HVDC (LCC-HVDC) system. Firstly, the dynamic phasor models of the single-ended LCC rectifier station, inverter station and the DC line are established ...
Li Huan, Qin Kang
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Research on the Modification Plan of HVDC Transfer Switch Arrester
南方能源建设, 2022 [Introduction] During the earth return and metallic return mode conversion of China's HVDC transmission projects in operation, several MRTB (metallic return transfer breaker) or ERTB (earth return transfer breaker) oscillation platform arrester damage ...
LU Yuxin +5 more
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IET Generation, Transmission & Distribution, 2023 The impulse grounding impedance of tower grounding device is one of the important factors in the lightning protection evaluation of transmission line. The impulse characteristic test of the actual tower grounding device under lightning was rarely carried
Yi Zhang +7 more
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Energies, 2021 The internal pressure of a vacuum interrupter (VI) is increased by arc heat, ceramic cracking, gas leakage, and manufacturing defects. Accordingly, the dielectric strength of VI rapidly decreases.
Seungmin Bang +2 more
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Influence of Inverter Controller Parameters on the Small-signal Stability of LCC-HVDC System Based on a Practical Project [PDF]
E3S Web of Conferences, 2021 Unreasonable control parameters of the Line Commutated Converter based High Voltage Direct Current (LCC-HVDC) system may induce small-signal instability.
Li Huan, Qin Kang
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Study on Overvoltage of Wind Farm Under AC Fault at Sending End of HVDC Transmission System
Zhongguo dianli, 2023 When the short circuit ratio of receiving end AC system is small, the fault disturbance of sending end AC system may cause commutation failure of the inverter and overvoltage at the LCC-HVDC sending end AC bus.
Wei LIANG +5 more
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A novel HVDC circuit breaker for HVDC application [PDF]
International Journal of Electrical Power & Energy Systems, 2019 Hybrid high voltage direct current circuit breakers (DCCBs) are capable of interrupting fault current within a few milliseconds, but this technology has high capital cost, especially in a meshed HVDC grid. To increase the economic competitiveness of hybrid DCCBs, this paper proposes a capacitor commutated dc circuit breaker (CCCB).
Zhou, Meng +4 more
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Selective Harmonic Elimination Modulation for HVDC Modular Multilevel Converter
, 2021 This paper proposes the application of a mixed selective harmonic elimination mitigation modulation algorithm to three-phase HVDC modular multilevel converters. Defining 1 the number of levels, two cases have been considered: t=65 and t=257.
Cimoroni M. G. +5 more
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Optimal PMU Placement Considering with HVDC Links and Their Voltage Stability Requirements [PDF]
AUT Journal of Electrical Engineering, 2019 In wide area measurement systems, PMUs are the main component measuring real time synchronized data from different buses. Installation of PMUs at all buses is a primary way to provide full observability of the power network.
Milad Dalali, Hosein Kazemi Karegar
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The Journal of Engineering, 2019 Here, the uncontrolled rectification pre-charging characteristics of the VSC-HVDC system with different modular multilevel converter (MMC) topologies such as full-bridge, half-bridge, and hybrid topologies are proposed based on theoretical analysis and ...
Yuxin Lu +5 more
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