| Abstract: |
| Half-wavelength AC Transmission (HWACT) can improve capability of AC transmission significantly. According to the
basic principle of HWACT, the electromagnetic transient model of HWACT is built to analyze the fault transient
process of transmission line. Based on fault characteristics of HWACT, the adaptability of traditional protections for
transmission lines is analyzed briefly, such as current differential protection, distance protection and over current
protection. In order to solve the problems of conventional protection caused by HWACT, a novel integrated
protection based on multi-frequency domain information is proposed in this paper, which uses both the power
frequency information and transient information. The integrated protection based on multi-frequency domain
information takes advantages of power frequency and transient protections, which can not only improve the
performance of traditional protection of AC transmission line but also realize fast fault judgment by transient
travelling wave protection. |
| Key words: Half-wavelength AC transmission, Relaying protection, Electromagnetic transient simulation, Travellingwave |
| DOI：10.1186/s41601-016-0027-8 |
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| Fund: |
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