Adaptive restart scheme based on active injection current ratio for half-bridge MMC-HVDC with overhead transmission lines
-
Jingru Zhang
,
Baina He
,
Renzhuo Jiang
Abstract
Modular multilevel converter for high voltage DC system has great potential as the key role in global energy interconnection. Adaptive reclosing or restarting after suffering from short-circuit faults is a critical segment to realize safe and stable operation. An adaptive restart scheme for the half-bridge sub-module transmission system is proposed, which is based on the active current injection of the auxiliary fault discriminate module. Combined with the engineering experience, the transient characteristics of the line current during the fault restart stage are analyzed. The ratio of the current peaks at both ends of the fault point is used as the criterion. Moreover, the restart current suppression strategy is introduced into the adaptive restart scheme. It provides a decision-making basis for discriminate the property of the fault and improves the success rate of fault restart. The simulation results show that after the external auxiliary module is introduced into the adaptive restart stage, the restart current does not exceed the rated value. Finally, The permanent fault and the transient fault can be successfully distinguished, providing a reliable guarantee for the subsequent action decision of the protection devices.
Funding source: Department of Education of Shandong Province
Award Identifier / Grant number: SDYKC1910
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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© 2021 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
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- Comparison between saturated-iron core and shielded-iron core superconducting fault current limiters on recloser-fuse coordination of radial distribution systems connected with distributed generation
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- Adaptive restart scheme based on active injection current ratio for half-bridge MMC-HVDC with overhead transmission lines
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Articles in the same Issue
- Frontmatter
- Research Articles
- Design of a one kilowatt wireless charging system for electric vehicle in line with Bharath EV standards
- DC-link current based position estimation and speed sensorless control of a BLDC motor used for electric vehicle applications
- Controller design for output constrained thyristor controlled series capacitor (TCSC) of time-delayed power system
- Maximum power point tracking algorithm for photovoltaic systems considering error minimization and power derivative
- Techno-economic approach towards reactive power planning ensuring system security on energy transmission network
- Comparison between saturated-iron core and shielded-iron core superconducting fault current limiters on recloser-fuse coordination of radial distribution systems connected with distributed generation
- A composite power quality index for low-voltage active distribution networks
- Adaptive restart scheme based on active injection current ratio for half-bridge MMC-HVDC with overhead transmission lines
- Fast recovery strategy for MMC-HVDC based on coordination of fault current suppression and adaptive restart
