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A method for accurately calculating the electric field strength of the conductor surface based on a simulated charge method

A method of simulating electric charge, a technique of simulating electric charge, applied in calculation, design optimization/simulation, electrical digital data processing, etc., can solve problems such as inability to calculate the surface electric field intensity of sub-conductors, and overcome the inability to accurately calculate and accurately calculate the electric field on the surface of conductors Evaluate, improve the effect of accuracy

Active Publication Date: 2019-02-15
STATE GRID ANHUI ELECTRIC POWER +1
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Problems solved by technology

[0004] In engineering analysis, the calculation method for calculating the electric field intensity on the surface of the line adopts the equivalent radius method. The basic idea is to replace the split wire with a single equivalent wire, then calculate the total charge of each equivalent wire, and further calculate the electric field on the wire surface Intensity, this method is simple and easy, but it cannot calculate the electric field intensity on the surface of the sub-conductor

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  • A method for accurately calculating the electric field strength of the conductor surface based on a simulated charge method
  • A method for accurately calculating the electric field strength of the conductor surface based on a simulated charge method
  • A method for accurately calculating the electric field strength of the conductor surface based on a simulated charge method

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Embodiment Construction

[0022] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] The invention is used to calculate the electric field strength on the surface of the direct current transmission line conductor, figure 1 The calculation flow is shown, and the method includes the following steps:

[0024] Step 1: According to the positional relationship of the DC transmission line, establish a coordinate system, instead of using the equivalent single wire method for the split wire, set n simulated charges Q inside each sub-wire of the split wire j (j=1, 2, . . . , n). Taking the four-split wire of ±500kV DC transmission line as an example, there are 8 sub-wires at the two poles (positive and negative), and a total of 8n analog charges are set.

[0025] Step 2: On the given boundary of each sub-conductor of each pole, set the same number of matching points as the number of simula...

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Abstract

The invention provides a method for accurately calculating the electric field intensity on the conductor surface based on a simulated charge method, which comprises the following steps of setting simulated charge inside each sub-conductor of a split conductor; at the given boundary of each sub-conductor of each pole, setting the matching points with the same number as the simulated charges, and obtaining the simulated charges in each sub-conductor by the linear algebraic equations established by the position and potential information of the matching points and the simulated charges; then by setting the same number of check points as the matching points, checking the potential of each check point by the simulated charge inside each sub-conductor, and obtaining the simulated charge quantitysatisfying the precision requirement; and finally calculating the electric field strength of each sub-conductor surface by using the formula. The method of the invention fully considers the influenceof the line splitting conductor, effectively overcomes the problem that the electric field on the surface of the conductor cannot be accurately calculated due to the equivalence of the splitting conductor, and greatly improves the accuracy of the calculation of the electric field strength on the surface of the conductor.

Description

technical field [0001] The invention belongs to the fields of high-voltage power transmission technology and electromagnetic field calculation, in particular to a method for accurately calculating the electric field intensity on the surface of a wire based on an analog charge method. Background technique [0002] With the rapid development of my country's economy, the demand for electricity is also increasing, and my country is vigorously building ultra-high voltage and ultra-high voltage transmission lines. Compared with AC transmission lines, the DC transmission system has obvious advantages such as stronger power transmission capacity and lower loss, no need for synchronization of the AC systems on both sides, and small losses to the power grid when a fault occurs, and is especially suitable for long-distance point-to-point high-power transmission , so the DC transmission system has developed rapidly in recent years, and a number of UHV DC transmission lines have been com...

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Application Information

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IPC IPC(8): G06F17/50G06Q10/06G06Q50/06
CPCG06Q10/06393G06Q50/06G06F30/20Y02E60/00
Inventor 朱克亮孙明刚任红昕郭鑫杨仲吕刘婕罗义华汪宏春刘大平张永奈姚兰波徐宁张青波王明李迎春
Owner STATE GRID ANHUI ELECTRIC POWER
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