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On-line measurement method for parameters of airport power transmission cable

A measurement method and transmission line technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problem of measuring three-phase four-wire system transmission cables and transmission cable parameters that are not applicable to three-phase four-wire transmission cables Problems such as unbalanced parameters and low measurement accuracy achieve the effect of less calculation, satisfactory measurement accuracy and simple measurement process

Pending Publication Date: 2022-04-12
SHAANXI HUANGHE GROUP
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Problems solved by technology

However, the parameters of transmission cables are affected by the layout shape, and there is an imbalance in the parameters of three-phase four-wire transmission cables.
At present, the measurement of unbalanced transmission cable parameters is mainly suitable for three-phase three-wire transmission cables, and the measurement accuracy is low, so it is not suitable for measuring the parameters of three-phase four-wire transmission cables.

Method used

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  • On-line measurement method for parameters of airport power transmission cable
  • On-line measurement method for parameters of airport power transmission cable
  • On-line measurement method for parameters of airport power transmission cable

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Embodiment Construction

[0048] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0049] Furthermore, the drawings are merely schematic illustrations of embodiments of the disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus repeated descriptions thereof will be omitted. Some of the block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically separate entities.

[0050] This examp...

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Abstract

The embodiment of the invention relates to an on-line measurement method for parameters of an airport power transmission cable. The method comprises the following steps: establishing a three-phase four-wire asymmetric circuit model; a test power supply is not added, and current phasors of each phase line and a neutral line of the three-phase four-line power transmission cable are measured on line; adding a single-phase or double-phase test power supply, and carrying out online measurement on current phasors of each phase line and a neutral line of the three-phase four-line power transmission cable; calculating according to two times of online measurement to obtain a calculation formula of parameters of the power transmission cable; and according to the power supply voltage output by the aviation ground power supply and the current phasor measured by the added single-phase or double-phase test power supply, calculating to obtain the numerical value of the electric cable parameter. According to the embodiment of the invention, the three-phase four-wire asymmetric circuit model is established and is measured by using the single-phase or bidirectional test power supply, so that the parameters of the three-phase four-wire power transmission cable of the aviation ground power supply system can be accurately measured, the measurement process is simple, the calculated amount is small, and the measurement precision can meet the requirements of actual engineering measurement.

Description

technical field [0001] Embodiments of the present disclosure relate to the technical field of cable measurement, and in particular to an online method for measuring parameters of power transmission cables at airports. Background technique [0002] With the acceleration of the strategic transformation of the Air Force and the profound changes in the combat training mode of the Air Force, higher requirements are put forward for the aviation ground power supply system to ensure the quality of power supply for military fighters. The aviation ground power supply system provides 115V / 400Hz three-phase AC power for the aircraft when it is on the ground for maintenance, inspection, and when the aircraft is started. However, the aviation ground power supply belongs to high-power and high-current power supply equipment, its capacity can reach 200KVA, and the current can reach 580A under the condition of 115V. At the same time, the power supply distance of the aviation ground power su...

Claims

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Application Information

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IPC IPC(8): G01R31/00
Inventor 赵旭光吴孟宸孟伟李亚秋田晓迪周雷孙墨祺刘志强
Owner SHAANXI HUANGHE GROUP
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