Telephone Interference Criteria for HVDC Transmission Lines

Johansson, A.; Ekström, Å.

doi:10.1109/mper.1989.4310643

Cited by 8 publications

(4 citation statements)

References 1 publication

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“…where U mode and I mode are the voltage vector and the current vector in the mode domain corresponding to U ph and I ph , respectively, and T u and T i are the voltage and current phase-mode transformation matrices. According to (3) and (4), (1) and (2) can be rewritten as follows:…”

Section: Line Nodal Admittance Matrix Y Lmentioning

confidence: 99%

“…Under normal operating conditions, because of the converter's nonlinear characteristic, high-voltage DC (HVDC) systems generate a certain amount of harmonic currents on DC transmission lines. These harmonics interfere with the nearby communication lines through capacitive, inductive, and resistive coupling [1][2][3]. In order to limit the interference within an acceptable level, DC filters are always installed on the DC side.…”

Section: Introductionmentioning

confidence: 99%

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Research on transmission line model based on phase‐mode transformation in HVDC system

Lai

et al. 2019

IEEJ Transactions Elec Engng

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For a high-voltage DC (HVDC) transmission system, this paper describes an improved algorithm for the coupled multi-phase transmission line model and complete procedures for the calculation of the DC-side harmonic currents. First, based on the phasemode transformation, an improved coupled multi-phase transmission line model is proposed. In other words, the transmission line is represented as a nodal admittance matrix form, considering computational accuracy and efficiency. In addition, when calculating the DC-side harmonic currents, the line-commutated converters at the rectifier side and the inverter side are equivalent to the three-pulse harmonic voltage source models. Second, based on the DC-side equivalent models mentioned previously and the nodal voltage analysis method, an analytical method and complete procedures for the calculation of the DC-side harmonic currents in the HVDC systems, namely, the equivalent disturbing current, are described. Finally, a case study is carried out on a 4000 MW/±800 kV HVDC system. In the same condition, the analytical results are basically consistent with the simulation results of PSCAD/EMTDC, thus proving the accuracy of the proposed model.

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Section: Line Nodal Admittance Matrix Y Lmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Research on transmission line model based on phase‐mode transformation in HVDC system

Lai

et al. 2019

IEEJ Transactions Elec Engng

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“…Issue d) is due to the induction on TLC systems generated by the harmonic components of the current flowing through the link [9,11]. Many years ago this issue was extremely problematic; today, with the diffusion of digital telecommunication techniques, together with the increase of optical fiber cables, the impact of such phenomenon is generally more limited.…”

Section: Compatibility Aspectsmentioning

confidence: 99%

Technical and compatibility issues in the design of HVDC sea electrodes

Girdinio

Molfino

Nervi

et al. 2012

International Symposium on Electromagnetic Compatibility - EMC EUROPE

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The HVDC (High Voltage Direct Current) transmission system, although in use since about half a century, is gaining new popularity in recent years, as it can allow to transmit very large amounts of power over long distance at reasonable costs. Many plants are being commissioned and many others are in the design phase, both for mainland and submarine links. Ground/sea electrodes are normally used in such applications, either operated on a full time basis, or during partial failures of one pole of bipolar plants. Due to the adverse effects that stray currents dispersed by such electrodes may have in terms of corrosion to nearby structures, and to the growing concern for environmental issues, the design of sea electrode has to be defined with increasing attention. This paper deals with the technologies and with the design criteria that can be adopted to develop satisfactory sea electrodes.

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“…An analytical evaluation on the interference effect caused by an HVDC system upon a telephone line is presented in . Such an analysis, though, is directed to the steady‐state operation of the DC line harmonics.…”

Section: Introductionmentioning

confidence: 99%

Interference of a line-commutated converter high-voltage direct current system upon pipelines located in its vicinity

Jardini

Vasquez-Arnez

Kovarsky³

et al. 2013

Int. Trans. Electr. Energ. Syst.

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Summary In this paper, the simulation results related to the interference of a high‐voltage direct current (HVDC) system upon objects located in its vicinity, during faults in the dc line, will be presented. Specifically, the induction effect over gas pipelines that cross the HVDC line will be addressed. A similar study was also performed for railways crossing the direct current line. From the results obtained regarding the line‐commutated converter‐HVDC line and the ground electrode effect, it was found that the levels of induced voltage upon these objects could neither offer high risk of damage due to corrosion (in the case of the electrode current) nor could offer high risk of electric shock on beings (humans and animals) touching the object during fault periods. It is expected that the modeling and outcome presented herein could contribute to the study and design of the interference phenomenon from HVDC systems. Copyright © 2013 John Wiley & Sons, Ltd.

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Telephone Interference Criteria for HVDC Transmission Lines

Cited by 8 publications

References 1 publication

Research on transmission line model based on phase‐mode transformation in HVDC system

Research on transmission line model based on phase‐mode transformation in HVDC system

Technical and compatibility issues in the design of HVDC sea electrodes

Interference of a line-commutated converter high-voltage direct current system upon pipelines located in its vicinity

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