Journal
PROTECTION AND CONTROL OF MODERN POWER SYSTEMS
Volume 5, Issue 1, Pages -Publisher
SPRINGER SINGAPORE PTE LTD
DOI: 10.1186/s41601-020-00157-9
Keywords
Flexible DC power grid; Fault analysis; Protection; Fault isolation; Reclose
Funding
- Fundamental Research Funds for the Central Universities [2019YJS179]
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With the development of power electronics technology, the flexible DC grid will play a significant role in promoting the transformation and reformation of the power grid. It is immune to commutation failure and has high flexibility in power control and renewable energy grid integration. However, the protection and fault handling technology for a flexible DC grid is a big challenge because of the limited overcurrent capability of the converters. This paper summarizes the development of the flexible DC grid, and analyzes the fault characteristics in detail. Next, the applicability, advantages and disadvantages of the existing protection principle, fault isolation and recovery schemes are reviewed. Finally, the key problems and development trend of the future flexible DC grid are pointed out and forecasted respectively.
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