Research on fault clearing scheme for half-bridge modular multilevel converters high voltage DC based on overhead transmission lines
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Abstract
When a short-circuit fault occurs on the transmission lines of high voltage DC transmission system based on modular multilevel converters, the fault cannot be cleared by adjusting the converter control system, which results in longer recovery time. Aiming at the problem above, a fault self-clearing scheme based on the fault clearing module for the half-bridge converter station is proposed. Combined with the actual operating status of the flexible DC transmission project, centralized parameter models are utilized to analyze the fault self-clearing mechanism. Besides, the impact of the discharge branch on the fault clearing effect is studied in depth to provide a design consideration for the fault clearing module and improve the comprehensive benefits of the proposed scheme. PSCAD/EMTDC simulation results show that the introduction of the fault clearing module in the half-bridge converter station can effectively suppress the fault short-circuit current and shorten the fault clearing time. In addition, circuit breakers on both sides of the line do not need to be tripped, providing a reliable guarantee for the subsequent adaptive restart process.
Funding source: Department of Education of Shandong Province
Award Identifier / Grant number: SDYKC19103
Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: This study was supported by Department of Education of Shandong Province under the grant number SDYKC1910.
Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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- Frontmatter
- Research Articles
- Research on intelligent substation monitoring by image recognition method
- Design optimization of permanent magnet synchronous motor using Taguchi method and experimental validation
- Performance analysis of shunt active filter for harmonic compensation under various non-linear loads
- A neural network approach to detect winding faults in electrical machine
- Adaptive relay settings for distribution network with distributed generation (DG) using Sugeno fuzzy inference
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- A comparative study of the speed control of an IM–based flywheel energy storage system using PI–DTC and RFOC strategies
- Energy management of a microgrid using demand response strategy including renewable uncertainties
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- Analysing integration issues of the microgrid system with utility grid network
