Analysis of some operation problems of half-wave length power transmission lines

Gatta, Fabio Massimo; Iliceto, F.

doi:10.1109/afrcon.1992.624418

Cited by 41 publications

(18 citation statements)

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“…The power-voltage characteristics also determine the overvoltage on the HWACT line. These could be serious when the transmission power is high [3,16]. If the power factor is equal to 1, the overvoltage at the midpoint of the line is roughly equal to the ratio of the active power to the natural power [1-3, 17, 18].…”

Section: Introductionmentioning

confidence: 99%

Penetrating power characteristics of half-wavelength AC transmission in point-to-grid system

Liang

Liu

Wan³

et al. 2018

J. Mod. Power Syst. Clean Energy

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With the concept of global energy interconnection being proposed, half-wavelength alternating current transmission (HWACT) technology becomes of more interest. HWACT lines can be adopted to establish a pointto-grid system, in which the penetrating power (PP) is produced between receiving terminals, having a significant effect on the power flow distribution. In order to investigate this phenomenon, the PP characteristics of the HWACT system are researched in this paper. First, the mathematical relationship between the transmission power and terminal bus voltages of a single HWACT line is derived using the equations of a distributed parameter model. The research indicates that the relationship between power and terminal voltages shows ''reverse characteristics'' opposite to those of regular short transmission lines. Then, the concept and definition of PP in a point-to-grid system with two receiving terminals are proposed, and the corresponding relationship between PP and the terminal bus voltages is derived. Simulations are carried out to validate the theory under different conditions, so that the accuracy and adaptiveness of the theoretical analysis can be proved. In addition, the results demonstrate that selecting the location for a HWACT system has demanding requirements in order to control the value of PP.

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Section: Introductionmentioning

confidence: 99%

Penetrating power characteristics of half-wavelength AC transmission in point-to-grid system

Liang

Liu

Wan³

et al. 2018

J. Mod. Power Syst. Clean Energy

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“…The half-wavelength transmission is an attractive technique for those situations. This kind of transmission has been studied since the 1940s, however, there is no half-wavelength transmission system operating in the world [4,5]. The feasibility of half-wavelength transmission systems still needs further study.…”

Section: Introductionmentioning

confidence: 99%

Infeasibility Analysis of Half-Wavelength Transmission Systems

Yang

Sheng

2018

Energies

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This paper analyzes the infeasibility of half-wavelength transmission systems in the aspects of power-frequency overvoltage and synchronization stability. The circuit model of the long-distance transmission system is established at first for steady-state and transient analysis. The sending-end system and the receiving-end system are both considered in the model. A test system based on an actual transmission line is given to facilitate the description of system characteristics. Based on the circuit model, the resonant transmission distance of the system is found and calculated. Theoretical analysis and numerical calculations are carried out to determine the feasibility transmission distance. It is demonstrated that the transmission distance should be in a certain range, which is larger than the resonant transmission distance, to satisfy the steady-state overvoltage and the small signal synchronization stability as well as the frequency deviation constraints. For transmission distances in the feasible range, the three-phase short circuit fault at a certain point of the transmission line will cause the most serious transient power-frequency overvoltage, and the system is very likely to lose synchronization stability. Considering the transient power-frequency overvoltage and the transient synchronization stability, the half-wavelength transmission system is technically impossible to operate.

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“…Current studies on the characteristics of half-wavelength transmission are mainly in the theoretical stage. It is necessary to study the characteristics of half-wavelength transmission lines through different means of simulation [1][2][3][4][5][6][7]. In this paper, digital simulation and dynamic simulation are carried out to study the electrical characteristics of half-wavelength AC transmission lines.…”

Section: Introductionmentioning

confidence: 99%

Study on the characteristics of half-wavelength transmission line with digital simulation and dynamic simulation

Bin

Ban

et al. 2018

Journal of International Council on Electrical Engineering

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AC Half-Wavelength transmission in UHV stage is an alternate for the long distance and large capacity power transmission, because of its unique characteristics. The characteristics halfwavelength transmission lines and conventional transmission lines are quite different. In this paper, digital simulation and dynamic simulation are carried out to study the electrical characteristics of half-wavelength AC transmission lines. Simulation results are compared and analyzed. The model and parameters of assumed half-wavelength transmission system are presented in this paper. The steady-state and transient characteristics of the half-wavelength AC transmission line are studied by digital simulation and dynamic simulation. The simulation results are given and analyzed. The validity of the digital simulation model was verified by the comparison of results of digital simulation and dynamic simulation.

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Analysis of some operation problems of half-wave length power transmission lines

Cited by 41 publications

References 1 publication

Penetrating power characteristics of half-wavelength AC transmission in point-to-grid system

Penetrating power characteristics of half-wavelength AC transmission in point-to-grid system

Infeasibility Analysis of Half-Wavelength Transmission Systems

Study on the characteristics of half-wavelength transmission line with digital simulation and dynamic simulation

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