Non-unit transient based boundary protection for UHV transmission lines

Luo, Sibei; Gao, Houlei; Wang, De Ming; Zou, Guibin

doi:10.1016/j.ijepes.2018.05.005

Cited by 27 publications

(12 citation statements)

References 24 publications

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“…The AC filters and RPDC are all connected in parallel, which is the same as the ground stray capacitance for the AC substation [1]. The case of the line boundary is shown in Fig.…”

Section: Frequency Characteristics Of Ac Boundary Of Inverter Stationmentioning

confidence: 99%

“…It has no effect on the accuracy of the boundary protection and can ensure reliability. (4) The boundary elements of R 2 depend on the characteristics of the line boundary N. For ultrahigh voltage AC lines, the line boundary N consists of only the busbar ground stray capacitance which has significant attenuation on high frequency components [1]. Thus, the time-domain energy of the high frequency components can be used to identify the fault.…”

Section: Protection Principlementioning

confidence: 99%

“…An HVDC transmission system has many advantages over an AC transmission system such as long transmission distance, high efficiency and large transmission capacity [1][2][3][4][5][6]. However, as an LCC-HVDC inverter station is severely affected by an AC transmission line (ACTL) fault, it is important that an ACTL fault is cleared quickly and reliably.…”

Section: Introductionmentioning

confidence: 99%

“…To improve the performance of boundary protection, the line boundary and corresponding characteristics in UHVAC transmission systems have been analyzed comprehensively based on real projects. Busbar stray capacitance, the shunt reactor, series capacitance and combined line boundary are used as the line boundary to distinguish internal and external faults considering fault characteristic differences, while a more precise setting method is proposed [1].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A fast boundary protection for an AC transmission line connected to an LCC-HVDC inverter station

Liu

Gao

Luo

et al. 2020

Prot Control Mod Power Syst

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For AC transmission lines connected to an LCC-HVDC inverter station, commutation failure can lead to the wrong operation of traditional protection. To solve the problem, this paper proposes a fast protection scheme using transient information from one end of the AC line. The boundary frequency characteristics of the AC line connected to LCC-HVDC inverter are analyzed first. This reveals the existence of significant attenuation on both high frequency signals and some specific frequency signals. Based on the boundary characteristics, a novel boundary protection principle utilizing a backward traveling wave is then proposed. A PSCAD/EMTDC simulation model of a ± 800 kV LCC-HVDC and 500 kV AC transmission system is established, and different fault cases are simulated. The simulation results prove that the novel protection principle is immune to commutation failure, fault resistance and fault type.

show abstract

“…The AC filters and RPDC are all connected in parallel, which is the same as the ground stray capacitance for the AC substation [1]. The case of the line boundary is shown in Fig.…”

Section: Frequency Characteristics Of Ac Boundary Of Inverter Stationmentioning

confidence: 99%

Section: Protection Principlementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A fast boundary protection for an AC transmission line connected to an LCC-HVDC inverter station

Liu

Gao

Luo

et al. 2020

Prot Control Mod Power Syst

View full text Add to dashboard Cite

show abstract

“…Guillen et al [7] proposed an algorithm for transmission line protection using discrete WT and singular value decomposition which has advantages of the reduced computational burden. Miscellaneous methods reported for transmission line fault recognition include phasor measurement unit [8], travelling wave theory [9], decision tree aided travelling wave [10], single ended travelling wave [11], non-unit transient [12], voltage response [13], transmission line topology, and source impedance [14]. Barbosa et al [15] introduced a machine learning algorithm to detect faults on anchor rods of the transmission line, which has high-detection accuracy.…”

Section: Introductionmentioning

confidence: 99%