CN112332297A - A Method for Determining Temporary Grounding Devices of Construction Lines - Google Patents
A Method for Determining Temporary Grounding Devices of Construction Lines Download PDFInfo
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- CN112332297A CN112332297A CN202011298596.XA CN202011298596A CN112332297A CN 112332297 A CN112332297 A CN 112332297A CN 202011298596 A CN202011298596 A CN 202011298596A CN 112332297 A CN112332297 A CN 112332297A
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- 238000010276 construction Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000005540 biological transmission Effects 0.000 claims abstract description 26
- 230000005674 electromagnetic induction Effects 0.000 claims abstract description 15
- 238000004088 simulation Methods 0.000 claims abstract description 10
- 239000002689 soil Substances 0.000 claims description 8
- 238000000819 phase cycle Methods 0.000 claims description 4
- 239000000725 suspension Substances 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 22
- 229910052742 iron Inorganic materials 0.000 abstract description 11
- 238000005094 computer simulation Methods 0.000 abstract description 2
- 230000006698 induction Effects 0.000 abstract description 2
- 238000007418 data mining Methods 0.000 abstract 1
- 239000004020 conductor Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/18—Network design, e.g. design based on topological or interconnect aspects of utility systems, piping, heating ventilation air conditioning [HVAC] or cabling
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2113/00—Details relating to the application field
- G06F2113/16—Cables, cable trees or wire harnesses
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Abstract
The invention provides a method for determining a temporary grounding device of a construction line, which comprises the steps of obtaining ground wire data, basic electric parameters of a live-line operation transmission line and the construction line, iron tower parameters and other electric basic parameters, inputting the obtained electric basic parameters in a CDEGS (compact data mining algorithm) and establishing a transmission line simulation model; and grounding both ends of the construction line, calculating electromagnetic induction current on the temporary grounding device according to the established simulation model, and selecting a proper temporary grounding device according to the magnitude of the electromagnetic induction current. If the calculated induced current is within the range of the rated current for a certain type of grounding device, then that type of grounding device can be selected. The invention accurately calculates the electromagnetic induction current on the temporary grounding device through simulation modeling, and determines the temporary grounding device of the construction line according to the calculated induction current, so as to make anti-induction electric measures and ensure the safety of constructors and equipment.
Description
Technical Field
The invention belongs to the technical field of high voltage of power systems, and particularly relates to a method for determining a temporary grounding device of a construction line.
Background
Along with the construction of high-voltage and ultra-high-voltage transmission line engineering, land resources are more and more tense, and dangers caused by induced voltage and induced current are more and more serious in the construction process of the transmission line. Therefore, in order to secure safety of constructors and equipment, it is necessary to research a method of determining a temporary grounding device of a construction line. How to improve the construction safety level of the transmission line has been paid increasing attention by people, and the downlead of the temporary grounding device of the transmission line lead is connected with the cross arm of the iron tower, and the temporary grounding device has the main function of limiting the level of the induced voltage on the transmission line lead within a certain range so as to reduce electric shock and personal accidents caused by the induced voltage. Undoubtedly, the rated current level of the temporary grounding device of the transmission line is an important index for selecting the temporary grounding device.
Therefore, in power transmission line construction, the induced voltage and the induced current level are key factors influencing the safety and reliability of construction, and the temporary grounding device arranged according to the requirement of construction safety has the important function of reducing the line induced voltage, so that the 'induced electricity prevention is considered to be grounded'.
In reality, the grounding device is mainly determined according to a universal grounding standard, and the temporary grounding device does not have adaptive changes for different soils, different geographic environments and different construction parallel conditions, so that the determined temporary grounding device has poor effect. Particularly, it is unclear how to use and assemble the grounding device according to local conditions in an area with high soil resistivity. Aiming at the model selection of the temporary grounding device in the actual use in the prior art, an effective solution is not provided at present.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a method for determining a temporary grounding device of a construction line, so that an anti-induction electric measure is made to ensure the safety of constructors and equipment.
A method of determining a temporary grounding device for a construction line, comprising the steps of:
step 1: acquiring basic electrical parameters including ground wire data, basic electrical parameters of live-line operation transmission lines and construction lines and iron tower parameters;
step 2: inputting the electrical basic parameters obtained in the step 1 into a CDEGS, and establishing a power transmission line simulation model;
and step 3: grounding both ends of the construction line, and calculating electromagnetic induction current on the temporary grounding device according to the simulation model;
and 4, step 4: and selecting a proper temporary grounding device according to the magnitude of the electromagnetic induction current.
Further, the ground wire data includes the ground wire model, the inner diameter, the outer diameter, the number of splits, the split spacing, and the sag.
Further, the basic electrical parameters of the live-line operation power transmission line and the construction line comprise the operation parameters of the live-line operation line, the radius, the split number, the phase sequence distribution and the soil resistivity along the live-line operation power transmission line and the construction line.
Further, the iron tower parameters include the type of the iron tower, the calling height, the span, the suspension point of the lead on the iron tower and the parameters.
Further, the operating line operating parameters include operating line voltage and current levels, and delivered power.
Further, in the step 4, if the calculated induced current is within the rated current range of a certain type of grounding device, the type of grounding device can be selected.
The invention has the beneficial effects that: the invention can overcome the defects of the prior art, accurately calculates the electromagnetic induction current on the temporary grounding device through simulation modeling, and determines the temporary grounding device of the construction line according to the calculated induction current, thereby making anti-induction electric measures and ensuring the safety of constructors and equipment.
Drawings
Fig. 1 is a flowchart of a method of determining a temporary grounding device of a construction line according to the present invention.
Detailed Description
The following describes in further detail embodiments of the present invention with reference to the accompanying drawings.
The invention provides a method for determining a temporary grounding device of a construction line, and referring to fig. 1, electromagnetic induction current on the temporary grounding device is subjected to simulation calculation by combining CDEGS software.
The CDEGS software is a set of engineering software package with powerful functions and high integration developed by SES company in Canada, and is tool software capable of accurately analyzing engineering problems such as grounding, electromagnetic field, electromagnetic interference and the like of a power system. According to the invention, the grounding working condition of the alternating current line during construction is combined with CDEGS software, factors such as line trend, sag, soil resistivity and the like are comprehensively considered, a temporary grounding device of the construction line is established, and the electromagnetic induction current on the temporary grounding device is more accurately calculated.
A method of determining a temporary grounding device for a construction line, comprising the steps of:
step 1: and acquiring electrical basic parameters.
The electrical basic parameters comprise ground wire data, basic electrical parameters of live-line operation transmission lines and construction lines, iron tower parameters, operation line operation parameters and the like.
The ground wire data comprises the ground wire model, the inner diameter, the outer diameter, the split number, the split distance and the sag; basic electrical parameters and iron tower parameters of live-line operation transmission lines and construction lines comprise radiuses, splitting numbers, phase sequence distribution, soil resistivity and iron tower types along the lines, breath height, span, suspension points of wires on the iron towers and parameters of the live-line operation transmission lines and the construction lines. The power transmission line data comprises the power transmission line model, the number of splits, the split spacing, the sag, the inner diameter, the outer diameter, the phase sequence, the height and the like. The operation parameters of the live operation line comprise voltage, current grade and transmission power of the operation line.
Step 2: the CDEGS was used to build a simulation model.
Selecting a HIFREQ module, setting a soil model, setting corresponding voltage and current excitation, setting conductor and coating types, and building a simulation model by using an SECAD (segmented alternating current) in CDEGS (compact disc integration software) according to the acquired parameters of the power transmission line, the grounding device, the resistivity of the soil along the power transmission line, the parameters of the iron tower and the like; when calculating the electromagnetic induction current, the established line model can be equivalent to a straight line segment of a cylindrical conductor, and the actual line is simulated by defining the diameter, resistivity, length and other parameters of the conductor. However, it should be noted that the surface or body-shaped metal facility cannot be simulated, so the HIFREQ module is only limited to modeling the line, and other devices such as transformers, lightning arresters, circuit breakers, etc. cannot be modeled. The sescd is a CAD graphical tool for creating, modifying and viewing complex grounded nets and above-ground metal objects. In HIFREQ, it is used to plot a network of wires.
And step 3: and calculating the electromagnetic induction current on the temporary grounding device.
And calculating the electromagnetic induction current on the temporary grounding device according to the simulation model. When calculating the electromagnetic induction current, both ends of the construction line need to be grounded.
And 4, step 4: and selecting a proper temporary grounding device according to the magnitude of the electromagnetic induction current.
And determining what type of construction line temporary grounding device is used according to the electromagnetic induction current obtained in the step 3. The model can be selected according to the existing temporary grounding device of the line if the calculated current is within the rated current range of the grounding device, and if not, the model is selected to be larger.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011298596.XA CN112332297A (en) | 2020-11-19 | 2020-11-19 | A Method for Determining Temporary Grounding Devices of Construction Lines |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011298596.XA CN112332297A (en) | 2020-11-19 | 2020-11-19 | A Method for Determining Temporary Grounding Devices of Construction Lines |
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| CN112332297A true CN112332297A (en) | 2021-02-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114709782A (en) * | 2022-04-11 | 2022-07-05 | 国网陕西省电力有限公司电力科学研究院 | A method for reducing potential difference in substation grounding grid caused by inrush current |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104810632A (en) * | 2015-04-29 | 2015-07-29 | 宗伟 | Method and device for determining grounding device of transmission line tower |
| CN108984959A (en) * | 2018-08-14 | 2018-12-11 | 国网安徽省电力有限公司 | The emulated computation method of newly-built DC power transmission line inductive voltage and current based on PSCAD |
| CN109002648A (en) * | 2018-08-20 | 2018-12-14 | 国网安徽省电力有限公司 | The emulated computation method of construction line inductive voltage and current based on CDEGS |
-
2020
- 2020-11-19 CN CN202011298596.XA patent/CN112332297A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104810632A (en) * | 2015-04-29 | 2015-07-29 | 宗伟 | Method and device for determining grounding device of transmission line tower |
| CN108984959A (en) * | 2018-08-14 | 2018-12-11 | 国网安徽省电力有限公司 | The emulated computation method of newly-built DC power transmission line inductive voltage and current based on PSCAD |
| CN109002648A (en) * | 2018-08-20 | 2018-12-14 | 国网安徽省电力有限公司 | The emulated computation method of construction line inductive voltage and current based on CDEGS |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114709782A (en) * | 2022-04-11 | 2022-07-05 | 国网陕西省电力有限公司电力科学研究院 | A method for reducing potential difference in substation grounding grid caused by inrush current |
| CN114709782B (en) * | 2022-04-11 | 2024-04-05 | 国网陕西省电力有限公司电力科学研究院 | A method for reducing the potential difference in the grounding network of a substation caused by an impulse current |
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Application publication date: 20210205 |