The parameter design method of smoothing inductance based on MMC-MTDC with R-type superconducting fault current limiter
The parameter design method of smoothing inductance based on MMC-MTDC with R-type superconducting fault current limiter
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- Author(s): P. Guo 1 ; Z. Yuan 1 ; G. Liu 2 ; Y. Zhao 2 ; Z. Shi 3
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View affiliations
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Affiliations:
1:
State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment, Department of Electrical Engineering , Tsinghua University , Beijing , China ;
2: Shenzhen Power Supply Corporation , Shenzhen , China ;
3: Sichuan Energy Internet Research Institute, Tsinghua University , Chengdu , China
Source:
The 16th IET International Conference on AC and DC Power Transmission (ACDC 2020),
2021
p.
297 – 304
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Affiliations:
1:
State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment, Department of Electrical Engineering , Tsinghua University , Beijing , China ;
- Conference: The 16th IET International Conference on AC and DC Power Transmission (ACDC 2020)
- DOI: 10.1049/icp.2020.0138
- ISBN: 978-1-83953-330-3
- Location: Online Conference
- Conference date: 02-03 July 2020
- Format: PDF
The rapid increase of voltage sourced converter brings the great development of the multi-terminal DC technology, both in the DC transmission and DC distribution fields. However, because of the weak impedance characteristic of the VSC-HVDC system, how to suppress and clear DC fault currents becomes a challenge. Considering the stability, the response speed and the system structure, it is not possible to apply excessive inductance at the DC side, hence, the current limiting effectiveness is relatively restricted. On the one hand, with the effective properties, Resistive type Superconducting Fault Current Limiter (R-SFCL) becomes an effective device to solve the problem of VSC-HVDC system under DC faults. On the other hand, because of dynamic energy-impedance characteristics of R-SFCL, the fixed impedance selection method at a certain time to carry out dynamic current limiting analysis is no longer applicable. Therefore, the DC fault current research and R-SFCL characteristic are comprehensively analyzed firstly in this paper. Based on that, a smoothing inductance determination method is proposed to cut off the DC fault current by DC breaker and ensure the continuous operation of remaining parts. Finally, based on a multi-terminal DC system simulation, the improvement and effectiveness of the proposed method are validated.
Inspec keywords: HVDC power transmission; superconducting fault current limiters; HVDC power convertors; power transmission faults; voltage-source convertors
Subjects: Other superconducting devices and material applications; DC-AC power convertors (invertors); Power electronics, supply and supervisory circuits; d.c. transmission; Protection apparatus; AC-DC power convertors (rectifiers)