Magnetic field of high-phase order and compact transmission lines

Ismail, Hanafy M.

doi:10.1002/er.762

Cited by 15 publications

(6 citation statements)

References 8 publications

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“…However, multi-circuit overhead lines are also utilized in Kuwait, India, China, and Malaysia. [3][4][5][6] Fault location is well studied for single-circuit [7][8][9][10][11][12][13][14][15][16] and double-circuit [17][18][19][20][21][22][23][24] series-compensated transmission lines (SCTLs) compared with multi-circuit SCTLs. In Saha et al, 7 one-terminal measurements in the phase domain are used to determine the fault location for single-circuit SCTL.…”

Section: Discussionmentioning

confidence: 99%

“…Recently, single‐ and double‐circuit overhead lines are widely spread in most countries. However, multi‐circuit overhead lines are also utilized in Kuwait, India, China, and Malaysia . Fault location is well studied for single‐circuit and double‐circuit series‐compensated transmission lines (SCTLs) compared with multi‐circuit SCTLs.…”

Section: Introductionmentioning

confidence: 99%

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A new fault location technique for four‐circuit series‐compensated transmission lines

Saber

2018

Int Trans Electr Energ Syst

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Summary This paper introduces a new fault location technique for two‐terminal four‐circuit series‐compensated untransposed transmission line utilizing synchronized phasor measurements. The proposed technique is formulated based on theory of transmission lines and Taylor series expansion of distributed parameter line model considering the mutual couplings between the parallel lines. The technique does not require the fault type and the equivalent impedance model of metal‐oxide varistor (MOV) and series capacitor. Firstly, two subroutines are derived to determine the true fault location assuming that the fault occurs on both sides of the series compensator (SC). After that, the true fault location is selected based on the fact that the equivalent impedance of the SC must have resistive and capacitive components. A 500‐kV system with four‐circuit series‐compensated line is simulated in DIgSILENT Power Factory software while the fault location calculations are implemented in MATLAB. The proposed technique is investigated under different fault resistances and locations as well as all fault types including inter‐circuit faults. In addition, the effect of complex fault impedance, variation of earth resistivity, synchrophasors errors, and errors in line parameters is checked. The simulation study assures the validation of the technique for all simulated fault cases.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A new fault location technique for four‐circuit series‐compensated transmission lines

Saber

2018

Int Trans Electr Energ Syst

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“…The mutual impedances between phases of one line are eliminated first, and then the line-to-line mutual impedances are decoupled. The mutual impedances between phases can be eliminated by the symmetrical components shown in (3). The transforming matrix for symmetrical method for double-circuit line is the matrix Q, where a = e j 120 • = −1/2 + j ( √ 3/2).…”

Section: New Decoupling Methods For Double-circuit Linementioning

confidence: 99%

“…With the development of modern society, it is necessary to expand the power transmission capacity. The available land areas are shrinking, so the high phase order transmission system is considered as an alternative for increasing the power transmission capability [1][2][3]. Double-circuit transmission lines on the same tower can efficiently cut down the electric power infrastructure cost and enhance the capability of transmission lines.…”

Section: Introductionmentioning

confidence: 99%

A new decoupling method for double‐circuit transmission lines with asymmetrical parameters

Fan

Liu

2016

IEEJ Transactions Elec Engng

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The six-sequence component method is widely used in short-circuit calculation of double-circuit lines. However, this method can be used to decouple only two parallel transmission lines whose parameters are exactly the same. In this paper, a new sequence component method is introduced to deal with the lines whose parameters are not exactly the same. Mutual impedances between phases of the same line are decoupled first, and then the zero-sequence mutual impedances between different lines are decoupled. Six new independent components are obtained after decoupling. System impedances are modified based on the relationship between voltages and currents of the new sequence components and the traditional sequence components. According to the boundary conditions of the faults, the characteristics of new sequence components are studied, and the corresponding sequence networks are discussed. According to the combined sequence network, new sequence currents can be calculated, and the phase currents can be obtained easily from the new sequence currents by a transformation matrix. PSCAD simulation results demonstrate that the short-circuit calculation method proposed in this paper is appropriate and practical to deal with the two parallel transmission lines with different parameters and partially coupled transmission lines.

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“…Recently, doublecircuit HV transmission lines have become very common in many countries. Four-circuit transmission lines, which are also known as quadruple transmission lines in a single tower, are used more and more widely in Asian countries such as Malaysia, India, Kuwait and China [1][2][3][4][5]. The main advantage of using a four-circuit transmission line is that it helps to solve the environmentally related problems such as earth geography and land availability.…”

Section: Introductionmentioning

confidence: 99%