Travelling wave pilot protection for LCC-HVDC transmission lines based on electronic transformers’ differential output characteristic

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

doi:10.1016/j.ijepes.2017.06.004

Cited by 41 publications

(17 citation statements)

References 26 publications

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“…If a fault happens at the negative pole, u(t) < 0 and the polarity of i F (t) is positive. Hence, in (17), E < 0. Fig.…”

Section: Rectifier Station Under External Faultmentioning

confidence: 93%

“…If PG or NG fault happens, the peak value of faulty transmission line will be greater than healthy transmission line [17]. If a fault happens between two polarities, the peak values of two transmission lines are generally equal.…”

Section: Faulty Pole Identification Principlementioning

confidence: 99%

“…Fig. 1 describes the VSC-HVDC transmission line's model [17], and the grounding fault occurs at F. The fault generated VTW could be defined as u F . Because C stands for distributed capacitance of VSC-HVDC transmission line…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Novel travelling wave directional pilot protection for VSC‐HVDC transmission line

Wang

Yang

et al. 2020

IET Generation, Transmission & Distribution

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“…If a fault happens at the negative pole, u(t) < 0 and the polarity of i F (t) is positive. Hence, in (17), E < 0. Fig.…”

Section: Rectifier Station Under External Faultmentioning

confidence: 93%

Section: Faulty Pole Identification Principlementioning

confidence: 99%

See 1 more Smart Citation

Novel travelling wave directional pilot protection for VSC‐HVDC transmission line

Wang

Yang

et al. 2020

IET Generation, Transmission & Distribution

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“…(1) The traveling wave based pilot directional protection method [15][16][17] constructs the protection criterion according to the characteristics of the forward and backward traveling waves. This method is poorly immune to the fault resistance and lacks the reference for protection setting.…”

Section: Introductionmentioning

confidence: 99%

A new pilot directional protection method for HVDC line based on the polarity of inductive energy

Kang

Zhou

et al. 2021

IET Generation Trans & Dist

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Concerning the poor immunity of DC line protection to fault resistance in the case of internal fault and its mal-operation proneness in the case of external fault, a new pilot directional protection scheme for HVDC line in AC/DC hybrid system based on the polarity of inductive energy is proposed. First, by analysing the conducting state of converter at different time sections, the impedance characteristic equations of converter in different commutation failure scenes are derived. On this basis, by combining the impedance characteristics of other components in DC system, the fault component network of an AC/DC hybrid system consisting of inductive impedances is established. Then, according to the difference in the flowing direction of the inductive energy in the fault component networks of internal and external faults, a protection criterion for identifying internal and external faults is constructed. Finally, simulation tests in RT-LAB verify that, the proposed method can accurately identify internal and external faults in different fault cases, unaffected by commutation failure and lightning interference and highly immune to the fault resistance. Besides, the proposed method does not involve real-time interaction of synchronous information, thus it is simple and reliable.

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“…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. Otherwise, it could lead to commutation failure or even an HVDC system blocking [7][8][9][10][11][12]. Commutation failure and complex electrical dynamics during the recovery process result in the backside system impedance exhibiting nonlinear time-varying characteristics, whereas the traditional AC system fault analysis theory is based on linear systems.…”

Section: Introductionmentioning

confidence: 99%

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

Travelling wave pilot protection for LCC-HVDC transmission lines based on electronic transformers’ differential output characteristic

Cited by 41 publications

References 26 publications

Novel travelling wave directional pilot protection for VSC‐HVDC transmission line

Novel travelling wave directional pilot protection for VSC‐HVDC transmission line

A new pilot directional protection method for HVDC line based on the polarity of inductive energy

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

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