Shielding analysis-optimization method and system for 3D ground power-frequency electric field of UHVAC power transmission line

A technology of power frequency electric field and transmission line, applied in electromagnetic field characteristics, measurement of electrical variables, measurement devices, etc., can solve problems such as inability to obtain shielding effect and complex situations

Active Publication Date: 2016-09-07
STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, the shielding analysis of the power frequency electric field is carried out in two dimensions.
However, in engineering practice, there will be multiple power frequency electric f

Method used

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  • Shielding analysis-optimization method and system for 3D ground power-frequency electric field of UHVAC power transmission line
  • Shielding analysis-optimization method and system for 3D ground power-frequency electric field of UHVAC power transmission line
  • Shielding analysis-optimization method and system for 3D ground power-frequency electric field of UHVAC power transmission line

Examples

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Effect test

Embodiment 1

[0113] As shown, as shown in the figure, figure 1 It is a flowchart of the present invention. figure 2 It is the flow chart of three-dimensional power frequency electric field calculation when erecting shielded wires. image 3 It is calculated for the schematic diagram of line charge division in the present invention. Figure 4 Create a schematic diagram for the local coordinates of the invention. The three-dimensional shielding analysis and optimization method for the ground power frequency electric field of the UHV AC transmission line provided in this embodiment includes the following steps:

[0114] S1 establishes a three-dimensional power frequency electric field shielding effect analysis calculation model;

[0115] S2 sets the shielding effect first threshold and shielding line optimization objective function;

[0116] S3 uses the analog charge method to calculate the three-dimensional power frequency electric field in the sensitive area when erecting shielded wires...

Embodiment 2

[0169] Such as Figure 5 as shown, Figure 5 It is a block diagram of the ground three-dimensional power frequency electric field shielding analysis and optimization system of UHV AC transmission line of the present invention. The ground three-dimensional power frequency electric field shielding analysis and optimization system for UHV overhead AC transmission lines provided in this embodiment includes a shielding effect calculation model establishment module, an initial value setting module, a shielded line optimization objective function calculation module, an analog charge method calculation module, a sensitive Area first threshold judgment module and optimal shielding scheme output module;

[0170] The shielding effect calculation model establishment module is used to establish a three-dimensional power frequency electric field shielding effect analysis calculation model;

[0171] The initial value setting module is used to set the first threshold value of the shielding ...

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Abstract

The invention discloses a shielding analysis and optimization method for the 3D ground power-frequency electric field of an UHVAC power transmission line. The method comprises that S1) an analysis and calculation model for the shielding effect of the 3D power-frequency electric field is established; S2) a shielding effect threshold and a shielding line optimizing objective function are established; S3) the 3D power-frequency electric field of a sensitive area when shielding lines are erected is calculated; S4) whether the power-frequency electric field surrounding the sensitive area satisfies requirement of limiting value is determined, and if no, the positions, amount and length of the shielding lines are optimized and adjusted till the sensitive area satisfies the requirements; S5) the state of the shielding lines is adjusted repeatedly till the total length of the shielding lines is minimal and the sensitive area satisfies the requirement of the limiting value; and S6) an optimal shielding scheme is provided aimed at practical lines. On the basis of a simulated charge method, the shielding effect of the ground 3D power-frequency electric field of the UHVAC power transmission line can be analyzed and optimized, it can be ensured that optimal shielding effect is obtained, materials used by the shielding lines are reduced, and the application value is practical engineering is high.

Description

technical field [0001] The invention relates to the field of power frequency electric fields, in particular to a method and system for three-dimensional shielding analysis and optimization of ground power frequency electric fields of UHVAC (Ultra High Voltage Alternating Current: UHVAC) transmission lines. Background technique [0002] In recent years, UHV AC transmission technology has developed rapidly in my country, and large-scale UHV AC transmission line projects have started construction one after another. At the same time, the resulting electromagnetic environmental impact has also received extensive public attention. Due to the high voltage level and large span of the UHV AC transmission line, there are relatively many sensitive points of the power frequency electric field under the line. [0003] During the operation of the UHV AC transmission line, if the power frequency electric field value at the sensitive point below the line exceeds the electromagnetic environ...

Claims

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Application Information

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IPC IPC(8): G01R29/08
CPCG01R29/0835
Inventor 邹岸新徐禄文宫林胡晓锐王谦吴高林
Owner STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST
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