A novel whole-line quick-action protection principle for HVDC transmission lines using one-end voltage. (February 2015)

• Record Type: Journal Article
• Authors: Gao, Shu-ping; Chu, Xu; Shen, Quan-yu; Jin, Xing-fu; Luo, Juan; Yun, Ye-yi; Song, Guo-bing
• Is Part Of: International journal of electrical power & energy systems. Volume 65(2015:Feb.)
• Page Start: 262
• Page End: 270
• Publication Date: 2015-02
• Subjects: HVDC transmission line -- Relay protection -- Whole-line quick-action -- One-end voltage -- Special frequency-band; Electrical engineering -- Periodicals; Electric power systems -- Periodicals; Électrotechnique -- Périodiques; Réseaux électriques (Énergie) -- Périodiques; Electric power systems; Electrical engineering; Periodicals; 621.3
• DOI: 10.1016/j.ijepes.2014.10.013
• Languages: English
• ISSNs: 0142-0615

Abstract

Highlights: The reactor and DC-filter act as the boundary element in HVDC transmission systems. When internal and external fault occur, voltage of certain frequency is different. Internal fault can be distinguished using certain frequency-band sampling voltage. This protection can substitute traveling-wave-based method as primary protection. The algorithm has been verified by simulations. Abstract: A novel rapid protection principle for HVDC transmission lines only using voltage signal from one-end is proposed in this paper in order to solve the problems of traditional protection principle using one-end data of HVDC, such as poor reliability and insufficient sensitivity. By analyzing the transmission characteristic of the electric network, which is made of reactor and DC-filter of HVDC transmission systems, it is clear that when internal and external fault occurs, the measured voltage is obviously different for some special frequency-band signals. For the difference, internal and external fault can be distinguished. Compared with the traditional protection methods, the protection principle is simple and has absolute selective and a general setting principle, the sample frequency is lower, and it is easy to be implemented. It can substitute the traveling-wave-based method for primary protection with more practicability in project. Simulation results show that the proposed protection principle can identify the fault occurring in the DC line or beyond the DC line and it can identify the fault pole. Moreover, it can operate rapidly, reliably, with high sensitivity and selectivity, under different fault conditions.