Single-ended protection method for hybrid HVDC transmission line based on transient voltage characteristic frequency band

Protection and Control of Modern Power Systems

Original Research

Shunguang Lei¹  Shixin Wang²  Hongchun Shu² 

[1] School of Electrical Engineering and Automation, Harbin Institute of Technology, 150001, Harbin, Heilongjiang Province, China;Yunnan Key Laboratory of Green Energy, Electric Power Measurement Digitalization, Control and Protection, Kunming University of Science and Technology, 650500, Kunming, Yunnan Province, China;

关键词: Boundary frequency characteristics;    Characteristic frequency band;    Hybrid HVDC;    Single-end protection;    Transient voltage;   

DOI  :  10.1186/s41601-023-00301-1

 received in 2023-02-14, accepted in 2023-05-28,  发布年份 2023

来源: Springer

【 摘 要 】

Hybrid high-voltage direct current (HVDC) transmission has the characteristic of long transmission distance, complex corridor environment, and rapid fault evolution of direct current (DC) lines. As high fault current can easily cause irreversible damage to power devices, rapid and reliable line protection and isolation are necessary to improve the security and reliability of hybrid HVDC transmission system. To address such requirement, this paper proposes a single-ended protection method based on transient voltage frequency band characteristics. First, the frequency characteristics of the smoothing reactor, DC filter, and DC line are analyzed, and the characteristic frequency band is defined. A fault criterion is then constructed based on the voltage characteristic frequency band energy, and faulty pole selection is performed according to the fault voltage characteristic frequency band energy ratio. The proposed protection method is verified by simulation, and the results show that it can rapidly and reliably identify internal and external faults, accurately select faulty poles without data communication synchronization, and has good fault-resistance and anti-interference performance.

【 授权许可】

CC BY   
© The Author(s) 2023

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