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Selecting and ordering method for conductive wire of extra-high voltage AC line

An ultra-high voltage AC, arrangement technology, applied in AC network circuits, circuit devices, special data processing applications, etc., can solve problems such as large differences in results

Active Publication Date: 2009-01-07
STATE GRID ELECTRIC POWER RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many calculation methods for corona loss, power frequency electric field, power frequency magnetic field, audible noise and radio interference, but the results obtained by using the same calculation conditions are quite different

Method used

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  • Selecting and ordering method for conductive wire of extra-high voltage AC line
  • Selecting and ordering method for conductive wire of extra-high voltage AC line
  • Selecting and ordering method for conductive wire of extra-high voltage AC line

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Embodiment Construction

[0015] The present invention will be described in further detail below in conjunction with examples, but these examples should not be construed as limiting the present invention.

[0016] (1) For the annual average corona power loss of the three-phase line, it is the sum of the corona power loss generated by the three-phase wire under various weather conditions (good weather, snowy day, rainy day, foggy day), which can be pressed formula to obtain

[0017] P k = n 2 r 0 2 8760 { [ F 1 ( E av 1 δ ...

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Abstract

The invention relates to a type selecting and arranging method of ultra high-voltage alternating current line wires and includes the following specific methods: establishing a space coordinate system according to the given types and arrangement modes of the wires to confirm a calculation model; calculating the coronal loss of the wires in different situations according to a method of coronal loss estimation given by A Handbook of Design of High-Voltage Power Lines of Electric Power Engineering; calculating the power frequency electric field strength in different situations according to a charge equivalent method; applying the ampere law to a current-carrying lead, adding the calculation results and obtaining the intensity of magnetic fields around the lead; calculating the generated audible noise with a BPA formula; calculating the generated radio interference with an excitation function method; making economic comparison of annual cost in different situations with an annual cost method and finally comparing various technical factors and economic factors to obtain the optimal types and arrangement of the wires. The comparison of the test data obtained through tests proves that the method has high accuracy and can be applied to guiding the selection of the wire types and arrangement modes in the construction of ultra high-voltage power lines.

Description

technical field [0001] The invention belongs to the field of electromagnetic compatibility of high-voltage power transmission and transformation projects, and specifically relates to a method for selecting and arranging conductors of 1000kV extra-high voltage AC lines. Background technique [0002] In order to meet the electricity demand for sustainable economic and social development, the construction of a strengthened power grid with UHV power grid as the core has become a strategic goal of power construction. When long-distance and large-capacity transmission is adopted, UHV transmission can effectively save line corridors, help improve network structure, reduce transmission bottlenecks, and achieve a wide range of resource optimization. The economic and social benefits are very obvious. Due to the high voltage level, the electromagnetic environment of UHV is different from that of 500kV lines. If the same split conductors of 500kV are used, environmental factors such as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00G06F17/00G06F17/50
CPCY02E60/76Y04S40/22Y02E60/00
Inventor 张广洲陈豫朝邬雄万保权张小武
Owner STATE GRID ELECTRIC POWER RES INST
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