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Method, device and equipment for calculating lightning induced voltage of insulated joint and medium

An insulating joint and lightning induction technology, which is applied in computer-aided design, calculation, design optimization/simulation, etc., can solve the problem that the electrical connection of pipelines on both sides cannot be isolated, the frequency variation characteristics of soil resistivity are not considered, and the actual situation varies greatly. and other problems, to achieve the effect of flexible path planning, saving manpower and material resources, and convenient operation.

Active Publication Date: 2021-09-21
STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the voltage of the insulating joint is too high, its insulation may be broken down, and it will not be able to isolate the electrical connection of the pipelines on both sides
At the same time, when the insulating joint breaks down, there will be a discharge phenomenon, which may ignite the flammable substances in the pipeline and cause serious accidents
Although the existing calculation method can be applied to the voltage calculation of insulating joints, it does not consider the frequency-varying characteristics of soil resistivity, which is quite different from the actual situation, and the calculated results are too large

Method used

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  • Method, device and equipment for calculating lightning induced voltage of insulated joint and medium
  • Method, device and equipment for calculating lightning induced voltage of insulated joint and medium
  • Method, device and equipment for calculating lightning induced voltage of insulated joint and medium

Examples

Experimental program
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Effect test

Embodiment 1

[0039] refer to figure 1 , a method for calculating lightning-induced voltage at insulating joints of buried pipelines, comprising the following steps:

[0040] Step 1. Collect transmission line parameters and oil and gas pipeline parameters. The transmission line information includes the line span, the height of the overhead line, the structure of the tower and the structure of the grounding device, etc. Oil and gas pipeline parameters include pipeline size, oil and gas pipeline burial depth, anti-corrosion layer parameters, and the location of insulating joints. In addition, it is also necessary to collect the spatial relative positions of oil and gas pipelines and transmission lines, as well as the local power frequency soil resistivity.

[0041] Step 2. Based on the electric line parameters collected in step 1, the oil and gas pipeline parameters, the spatial relative position of the oil and gas pipeline and the transmission line, and the local power frequency soil resisti...

Embodiment 2

[0055] A calculation method for lightning induced voltage of an insulating joint, comprising the following steps:

[0056] Step 1, line parameters: tower height 85m, line span 500m, ground wire diameter 1.66cm, grounding device is a square frame with ray structure, the side length of the box is 15m, the ray length is 20m, and the grounding conductor is a steel conductor with a radius of 1cm. Pipeline parameters: the buried depth is 1.5m, the length is 50km, the diameter is 406mm, the wall thickness is 6mm, and the surface resistivity of the anti-corrosion layer is 10 5 Ω·m 2 , The thickness of the anti-corrosion layer is 3mm. The pipeline is parallel to the transmission line with a distance of 30m, and the insulating joint of the pipeline is located at the nearest position to the tower struck by lightning. The soil resistivity is 1000Ω·m.

[0057] Step 2, establish a frequency domain calculation model according to the above parameters;

[0058] Step 3, the lightning curren...

Embodiment 3

[0065] Such as image 3 As shown, a lightning induced voltage calculation device for insulating joints provided by the present invention includes an acquisition module and a calculation output module;

[0066] Among them, the collection module is used to collect data, and transmit the collected data to the calculation output module; the data includes electric line parameters, oil and gas pipeline parameters, spatial relative positions of oil and gas pipelines and transmission lines, and local soil resistivity.

[0067] The calculation output module is used to collect the data collected by the module, establish the frequency domain calculation model of the interference voltage of the transmission line to the nearby pipeline, and then calculate the lightning induced voltage of the buried pipeline insulation joint by the frequency domain calculation model of the nearby pipeline interference voltage.

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Abstract

The invention discloses a method, a device and equipment for calculating lightning induced voltage of an insulated joint and a medium. The method comprises the following steps: 1) collecting line and pipeline parameters and soil resistivity parameters; 2) establishing a frequency domain calculation model of the interference voltage of the power transmission line to the pipeline; 3) carrying out Fourier transform on the lightning current waveform, and converting time domain calculation into frequency domain calculation; 4) determining parameters of the soil under different frequencies; (5) calculating the voltage of the insulation joint under different frequencies, and (6) carrying out inverse Fourier transform on the frequency domain calculation result to obtain the time domain waveform of the insulation joint. In the calculation process, the actual soil resistivity changes along with the frequency, and the soil resistivity is closely related to the voltage. The frequency change characteristic of the soil resistivity is considered, so that the calculation result is closer to the actual situation.

Description

technical field [0001] The invention belongs to the technical field of energy engineering, and in particular relates to a calculation method, device, equipment and medium for lightning induced voltage of an insulating joint. Background technique [0002] With the development of the economy, the society's demand for energy is increasing. However, when the fossil energy-based energy layout and power consumption are geographically reversed, long-distance energy transmission becomes inevitable. The shortage of corridor resources and the similar path planning principles of power channels and oil and gas pipelines make it very common for power channels and oil and gas pipelines to cross and parallel. A large number of power channels and oil and gas pipelines in parallel make the electromagnetic interference between the two more and more serious. Once the pipeline system is damaged, it will cause serious damage to the ecological environment and may also cause major safety productio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/18G06F30/20G06F113/14
CPCG06F30/18G06F30/20G06F2113/14Y02E60/00
Inventor 郭磊寇晓适鲁海亮丁国君李纯张科董曼玲李元杰刘阳姚伟
Owner STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST
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