A Distributed-parameters Transmission Line Model Developed Directly in the Phase Domain

Souza, Newton V.; Carvalho, Carolina Goulart de; Kurokawa, Sérgio; Pissolato, J.

doi:10.1080/15325008.2013.809823

Cited by 8 publications

(1 citation statement)

References 7 publications

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“…In the distributed parameter line model of the EHV/UHV AC transmission line, the voltage and current at any point along the line can be calculated by when voltage and current at the end of the line are known :

[\begin{matrix} center \\ \overset{\cdot}{U} \\ \overset{\cdot}{I} \end{matrix}] = [\begin{matrix} center \\ \cosh γ italicx & Z_{c} \sinh γ italicx \\ \frac{\sinh γ italicx}{Z_{c}} & \cosh γ italicx \end{matrix}] [\begin{matrix} center \\ \overset{\cdot}{U_{2}} \\ \overset{\cdot}{I_{2}} \end{matrix}]

where

\overset{\cdot}{U}

and

\overset{\cdot}{I}

, respectively, represent the voltage and current at length x from the end of the line;

\overset{\cdot}{U_{2}}

and

\overset{\cdot}{I_{2}}

are the terminal voltage and current respectively; and γ is the line propagation coefficient.…”

Section: Transmission Line Model With Distributed Parameter Charactermentioning

confidence: 99%

Calculation method of corona loss in EHV/UHV system based on distributed parameter characteristic

Pan

Chen

2018

IEEJ Transactions Elec Engng

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For the calculation of corona loss of extra-/ultra-high voltage (EHV/UHV) transmission lines, especially the estimation of realtime corona loss, there exists no accurate method. In this paper, a calculation method of corona loss in the EHV/UHV system based on a distributed parameter characteristic is proposed. Based on the π -shaped equivalent circuit of the long-line distributed parameter characteristic, and considering the voltage distribution along the line, a formula for calculating the corona loss under a variety of weather and annual average conditions is derived and the power equation for the corona loss of EHV/UHV system is established by the method. The example results show that the method is quite accurate. The calculation method of this paper can consider different weather conditions of the line sections to calculate the corona loss. It is more in line with the actual weather conditions on the surface of the EHV/UHV transmission lines. And the method can analyze the corona loss and its proportion to the total loss of the system under the annual average and different weather conditions. It is of great significance to the design and operation of an EHV/UHV system.

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[\begin{matrix} center \\ \overset{\cdot}{U} \\ \overset{\cdot}{I} \end{matrix}] = [\begin{matrix} center \\ \cosh γ italicx & Z_{c} \sinh γ italicx \\ \frac{\sinh γ italicx}{Z_{c}} & \cosh γ italicx \end{matrix}] [\begin{matrix} center \\ \overset{\cdot}{U_{2}} \\ \overset{\cdot}{I_{2}} \end{matrix}]

where

\overset{\cdot}{U}

and

\overset{\cdot}{I}

, respectively, represent the voltage and current at length x from the end of the line;

\overset{\cdot}{U_{2}}

and

\overset{\cdot}{I_{2}}

are the terminal voltage and current respectively; and γ is the line propagation coefficient.…”

Section: Transmission Line Model With Distributed Parameter Charactermentioning

confidence: 99%

Calculation method of corona loss in EHV/UHV system based on distributed parameter characteristic

Pan

Chen

2018

IEEJ Transactions Elec Engng

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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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An alternative procedure to obtain the ABCD matrix of multiphase transmission lines: Validation and applications

Colqui

Kurokawa

Pissolato

2020

Electric Power Systems Research

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A Distributed-parameters Transmission Line Model Developed Directly in the Phase Domain

Cited by 8 publications

References 7 publications

Calculation method of corona loss in EHV/UHV system based on distributed parameter characteristic

Calculation method of corona loss in EHV/UHV system based on distributed parameter characteristic

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

An alternative procedure to obtain the ABCD matrix of multiphase transmission lines: Validation and applications

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