CN105203021A - Measuring device and method of roughness coefficient of high-voltage conducting wire - Google Patents
Measuring device and method of roughness coefficient of high-voltage conducting wire Download PDFInfo
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Abstract
The invention belongs to the technical field of measurement of high pressure gas discharge electromagnetism, and discloses a measuring device and method of roughness coefficient of a high-voltage conducting wire. The measuring device is characterized in that: a cylindrical electrode is horizontally placed on a bracket, and is electrically grounded; the to-be-tested high-voltage conducting wire is horizontally fixed on support rods, and is coaxial with the cylindrical electrode; the probe of a direct-current electric field measuring device is placed in a circular hole in the cylindrical electrode, and is parallel and level with the inner surface of the cylindrical electrode; the to-be-tested high-voltage conducting wire is connected with the output end of a high-voltage direct current power supply, a synthesis electric field is formed between the inner surface of the cylindrical electrode and the to-be-tested high-voltage conducting wire, and ion current is generated; one end of a sample resistance is connected with a metal thin film, and the other end of the sample resistance is grounded; a voltmeter is connected with the two ends of the sample resistance in parallel; the output voltage of the high-voltage direct current power supply is adjusted, so as to obtain the synthesis electric field intensity at the cylindrical electrode, the ion current density and the synthesis electric field intensity of the surface of the be-tested high-voltage conducting wire; the roughness coefficient of the to-be-tested high-voltage conducting wire is obtained according to the Peek formula. According to the measuring device and method of roughness coefficient of the high-voltage conducting wire, accurate measurement of the roughness coefficient of the to-be-tested high-voltage conducting wire can be achieved.
Description
Technical field
The invention belongs to high-pressure discharge technical field of electromagnetic measurement, especially relate to a kind of measurement mechanism and method of the high-voltage conducting wires coefficient of roughness.
Background technology
Extra-high voltage direct-current transmission technology has become the core technology of China's transferring electricity from the west to the east strategy, bears the important mission ensureing economic development and energy resource supply, abatement atmospheric haze and environmental protect.China builds and many extra-high voltage direct-current transmission engineerings that put into operation successively.The electromagnetic environment of extra high voltage direct current transmission line is the Important Parameters of line design and operation.When transmission line of electricity normally runs, due to the generation of conductor corona phenomenon, circuit ambient air molecule is ionized generation negative ions, forms space charge.Ion directed movement under the effect of electric field forms gas current, referred to as ion current.The electric field of space charge superposes with the original nominal electric field of circuit, forms total electric field, or is called Ion Flow Field.At Near Ground, total electric field and ion current density are the important electromagnetic environment parameters of extra high voltage direct current transmission line.The generation of conductor corona also brings the phenomenon such as radio interference and audible noise.
The coefficient of roughness of wire is the basic parameter calculating extra high voltage direct current transmission line total electric field and ion current density.The coefficient of roughness of wire can be obtained by corona cage experiment.Wire applies different voltage, obtains the relation curve of corona cage side-walls total electric field and voltage.Curve is divided into two sections usually, and the point of two sections of connecting places, namely the undifferentiable point of curve, correspond to corona inception voltage.The coefficient of roughness is obtained again by corona inception voltage.In like manner, the relation curve of the relation curve of ion current density and voltage, radio interference level and voltage, and the curved line relation of audible noise and voltage can obtain the coefficient of roughness of wire.This method is " polygometry ".
But, due to the randomness of corona phenomenon, a certain physical quantity of acquisition and the undifferentiable point of voltage curve often not obvious, there is comparatively big error in corona inception voltage, cause obtain the coefficient of roughness inaccurate.Therefore, the present invention proposes a kind of measurement mechanism and method of the high-voltage conducting wires coefficient of roughness, can the Measurement accuracy high-voltage conducting wires coefficient of roughness.
Summary of the invention
The object of the invention is to the measurement mechanism and the method that propose a kind of high-voltage conducting wires coefficient of roughness.
A measurement mechanism for the high-voltage conducting wires coefficient of roughness, is characterized in that, comprises cylinder electrode 1, high-voltage conducting wires to be measured 2, support 3, pole 4, base 5, voltage equalizing ball 6, DC electric field measurement instrument 7, metallic film 8, metal screen layer 9; Being specially cylinder electrode 1 is placed horizontally on support 3, cylinder electrode 1 electrical grounding; Pole 4 is vertically fixed on cylinder electrode 1 both sides, and support 3 and pole 4 are fixed on base 5; High-voltage conducting wires 2 level to be measured is fixed on pole 4, and coaxially places with cylinder electrode 1; High-voltage conducting wires 2 two ends to be measured suit voltage equalizing ball 6, is used for preventing high-voltage conducting wires 2 to be measured from point discharge occurring; Cylinder electrode 1 there is a circular hole, in the probe placement of DC electric field measurement instrument 7 circular hole on cylinder electrode 1, and concordant with the inside surface of cylinder electrode 1, distort to prevent total electric field;
The inside surface of described cylinder electrode 1 posts insulation film, the upper surface metal clad film 8 of insulation film, metallic film 8 surrounding metal clad screen layer 9.
Described cylinder electrode 1 is the hollow cylinder be made up of 304 type stainless steel materials.
Described pole 4 is made up of electrically insulating material, and quantity is 2.
Described metallic film 8 and metal screen layer 9 are Copper Foil; Metallic film 8 is for measuring ion current density, and metal screen layer 9 is for weakening the edge effect of metallic film 8.
Utilize described measurement mechanism to measure a method for the high-voltage conducting wires coefficient of roughness, it is characterized in that, comprise the steps:
1) check that the probe of DC electric field measurement instrument is in the circular hole on cylinder electrode, guarantee that the probe of DC electric field measurement instrument is concordant with the inside surface of cylinder electrode;
2) high-voltage conducting wires to be measured connects the output terminal of a high-voltage DC power supply, opens high-voltage DC power supply, forms total electric field, and produce ion current between the inside surface and high-voltage conducting wires to be measured of cylinder electrode;
3) get a sampling resistor, signal wire connection metal film is passed through, other end ground connection in one end of sampling resistor; The two ends of sampling resistor are connected in parallel a voltage table;
4) regulate the output voltage of high-voltage DC power supply, record the reading of DC electric field measurement instrument and the reading of voltage table simultaneously; The reading of DC electric field measurement instrument is the total electric field strength at cylinder electrode place; According to reading and the formula of voltage table
obtain ion current density; Formula
in, J is ion current density; U
rfor the reading of voltage table; R is the resistance value of sampling resistor; S is the area of metallic film;
5) step 4 is utilized) total electric field strength, the ion current density at cylinder electrode place that obtain, according to formula
obtain the total electric field strength on high-voltage conducting wires surface to be measured; Formula
in, E
1for the total electric field strength on high-voltage conducting wires surface to be measured; E
2for the reading of DC electric field measurement instrument; R
1for the radius of high-voltage conducting wires to be measured; R
2for the radius of cylinder electrode; K is ion mobility; ε is the specific inductive capacity of air;
6) the total electric field strength E on high-voltage conducting wires surface to be measured is utilized
1, according to Peek formula
obtain the coefficient of roughness of high-voltage conducting wires to be measured; Peek formula
in, m is the coefficient of roughness of high-voltage conducting wires to be measured; δ is the relative density of air.
The invention has the beneficial effects as follows for the inaccurate problem of the polygometry measure traverse line coefficient of roughness, a kind of measurement mechanism and method of the high-voltage conducting wires coefficient of roughness are proposed, coaxial cylindrical electrode structure ensure that the electric fields uniform degree under same radius, by the measurement of ion current density, total electric field strength, the coefficient of roughness of different high-voltage conducting wires can be obtained, thus realize the Measurement accuracy of the high-voltage conducting wires coefficient of roughness; Contact closely with the actual measurement of industry field, for the surface state and total electric field studying high-voltage conducting wires provides technical support.
Accompanying drawing explanation
Fig. 1 is the measurement mechanism schematic diagram of the high-voltage conducting wires coefficient of roughness.
Fig. 2 is the method flow diagram utilizing measurement mechanism to measure the high-voltage conducting wires coefficient of roughness.
Fig. 3 is the measurement result figure of the high-voltage conducting wires coefficient of roughness.
Number in the figure: 1-cylinder electrode, 2-high-voltage conducting wires to be measured, 3-support, 4-pole, 5-base, 6-voltage equalizing ball, the probe of 7-DC electric field measurement instrument, 8-metallic film, 9-metal screen layer.
Embodiment
The present invention proposes a kind of measurement mechanism and method of the high-voltage conducting wires coefficient of roughness, elaborates to the present invention below in conjunction with the drawings and specific embodiments.
Figure 1 shows that the measurement mechanism schematic diagram of the high-voltage conducting wires coefficient of roughness; Comprise cylinder electrode 1, high-voltage conducting wires to be measured 2, support 3, pole 4, base 5, voltage equalizing ball 6, DC electric field measurement instrument 7, metallic film 8, metal screen layer 9; Being specially cylinder electrode 1 is placed horizontally on support 3, cylinder electrode 1 electrical grounding; Pole 4 is vertically fixed on cylinder electrode 1 both sides, and support 3 and pole 4 are fixed on base 5; High-voltage conducting wires 2 level to be measured is fixed on pole 4, and coaxially places with cylinder electrode 1; High-voltage conducting wires 2 two ends to be measured suit voltage equalizing ball 6, is used for preventing high-voltage conducting wires 2 to be measured from point discharge occurring; Cylinder electrode 1 there is a circular hole, in the probe placement of DC electric field measurement instrument 7 circular hole on cylinder electrode 1, and concordant with the inside surface of cylinder electrode 1, to prevent total electric field from distorting, as shown in Fig. 1 (a);
The inside surface of described cylinder electrode 1 posts insulation film, the upper surface metal clad film 8 of insulation film, and metallic film 8 surrounding metal clad screen layer 9, as shown in Fig. 1 (b); Metallic film 8 to be areas the be Copper Foil of 100 square centimeters in the present embodiment, metal screen layer to be width the be Copper Foil of 2.5 centimetres; Metallic film 8 is for measuring ion current density, and metal screen layer 9 is for weakening the edge effect of metallic film 8.
Wherein, described cylinder electrode 1 is the hollow cylinder be made up of 304 type stainless steel materials.
Wherein, described pole 4 is made up of electrically insulating material, and quantity is 2.
Figure 2 shows that the method flow diagram utilizing measurement mechanism to measure the high-voltage conducting wires coefficient of roughness; Comprise the steps:
1) check that the probe of DC electric field measurement instrument is in the circular hole on cylinder electrode, guarantee that the probe of DC electric field measurement instrument is concordant with the inside surface of cylinder electrode;
2) high-voltage conducting wires to be measured connects the output terminal of a high-voltage DC power supply, opens high-voltage DC power supply, forms total electric field, and produce ion current between the inside surface and high-voltage conducting wires to be measured of cylinder electrode;
3) get a sampling resistor, signal wire connection metal film is passed through, other end ground connection in one end of sampling resistor; The two ends of sampling resistor are connected in parallel a voltage table;
4) regulate the output voltage of high-voltage DC power supply, record the reading of DC electric field measurement instrument and the reading of voltage table simultaneously; The reading of DC electric field measurement instrument is the total electric field strength at cylinder electrode place; According to reading and the formula of voltage table
obtain ion current density; Formula
in, J is ion current density; U
rfor the reading of voltage table; R is the resistance value of sampling resistor; S is the area of metallic film;
5) step 4 is utilized) total electric field strength, the ion current density at cylinder electrode place that obtain, according to formula
obtain the total electric field strength on high-voltage conducting wires surface to be measured; Formula
in, E
1for the total electric field strength on high-voltage conducting wires surface to be measured; E
2for the reading of DC electric field measurement instrument; R
1for the radius of high-voltage conducting wires to be measured; R
2for the radius of cylinder electrode; K is ion mobility; ε is the specific inductive capacity of air;
6) the total electric field strength E on high-voltage conducting wires surface to be measured is utilized
1, according to Peek formula
obtain the coefficient of roughness of high-voltage conducting wires to be measured; Peek formula
in, m is the coefficient of roughness of high-voltage conducting wires to be measured; δ is the relative density of air.
Particularly:
High-voltage conducting wires to be measured is placed on cylinder electrode axle center place, high-voltage conducting wires to be measured is fixed on pole, and high-voltage conducting wires two ends to be measured are set with voltage equalizing ball.The probe of DC electric field measurement instrument is put into the circular hole on cylinder electrode, and make the probe of DC electric field measurement instrument concordant with cylinder electrode inside surface.The output terminal of high-voltage conducting wires to be measured with a high-voltage DC power supply is connected, opens high-voltage DC power supply, between cylinder electrode and high-voltage conducting wires to be measured, produce total electric field.
Regulate high-voltage DC power supply, make output voltage stabilization at 8.1kV, record the reading of DC electric field measurement instrument and the reading of voltage table simultaneously; The reading of DC electric field measurement instrument is the total electric field strength at cylinder electrode place; Ion current density is obtained according to the reading of voltage table and formula (1)
In formula (1), J is ion current density, U
rfor the reading of voltage table, R is the resistance value of sampling resistor, and S is the area of metallic film.
Utilize total electric field strength, the ion current density at the cylinder electrode place obtained, according to electromagnetic field principle, obtained the total electric field strength on high-voltage conducting wires surface to be measured by formula (2):
In formula (2), E
1for the total electric field strength on high-voltage conducting wires surface to be measured; E
2for the reading of DC electric field measurement instrument; R
1for the radius of high-voltage conducting wires to be measured; R
2for the radius of cylinder electrode; K is ion mobility; ε is the specific inductive capacity of air.
The coefficient of roughness of the high-voltage conducting wires to be measured when being 8.1kV according to Peek formula acquisition voltage, Peek formula is:
In Peek formula, m is the coefficient of roughness of high-voltage conducting wires to be measured; δ is the relative density of air.
Regulate high-voltage DC power supply, make output voltage be stabilized in 8.2kV, 8.3kV, 8.4kV and 8.5kV respectively, record the reading of DC electric field measurement instrument and the reading of voltage table simultaneously.According to formula (1), formula (2) and Peek formula, obtain the coefficient of roughness of the high-voltage conducting wires to be measured when high-voltage DC power supply output voltage is respectively 8.2kV, 8.3kV, 8.4kV and 8.5kV respectively.
Figure 3 shows that the measurement result figure of the high-voltage conducting wires coefficient of roughness; Can find out according to Fig. 3: the high-voltage conducting wires coefficient of roughness obtained measured by the measurement mechanism of the high-voltage conducting wires coefficient of roughness utilizing the present invention to propose and method is stable under different voltage.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (5)
1. the measurement mechanism of a high-voltage conducting wires coefficient of roughness, it is characterized in that, comprise cylinder electrode (1), high-voltage conducting wires to be measured (2), support (3), pole (4), base (5), voltage equalizing ball (6), DC electric field measurement instrument (7), metallic film (8), metal screen layer (9); Being specially cylinder electrode (1) is placed horizontally on support (3), cylinder electrode (1) electrical grounding; Pole (4) is vertically fixed on cylinder electrode (1) both sides, and support (3) and pole (4) are fixed on base (5); High-voltage conducting wires to be measured (2) level is fixed on pole (4), and coaxially places with cylinder electrode (1); High-voltage conducting wires to be measured (2) two ends suit voltage equalizing ball (6), are used for preventing high-voltage conducting wires to be measured (2) from point discharge occurring; (1) has a circular hole to cylinder electrode, in the probe placement of DC electric field measurement instrument (7) circular hole on cylinder electrode (1), and concordant with the inside surface of cylinder electrode (1), distort to prevent total electric field;
The inside surface of described cylinder electrode (1) posts insulation film, the upper surface metal clad film (8) of insulation film, metallic film (8) surrounding metal clad screen layer (9).
2. the measurement mechanism of a kind of high-voltage conducting wires coefficient of roughness according to claim 1, it is characterized in that, described cylinder electrode (1) is the hollow cylinder be made up of 304 type stainless steel materials.
3. the measurement mechanism of a kind of high-voltage conducting wires coefficient of roughness according to claim 1, it is characterized in that, described pole (4) is made up of electrically insulating material, and quantity is 2.
4. the measurement mechanism of a kind of high-voltage conducting wires coefficient of roughness according to claim 1, it is characterized in that, described metallic film (8) and metal screen layer (9) are Copper Foil; Metallic film (8) is for measuring ion current density, and metal screen layer (9) is for weakening the edge effect of metallic film (8).
5. utilize measurement mechanism described in claim 1 to measure a method for the high-voltage conducting wires coefficient of roughness, it is characterized in that, comprise the steps:
1) check that the probe of DC electric field measurement instrument is in the circular hole on cylinder electrode, guarantee that the probe of DC electric field measurement instrument is concordant with the inside surface of cylinder electrode;
2) high-voltage conducting wires to be measured connects the output terminal of a high-voltage DC power supply, opens high-voltage DC power supply, forms total electric field, and produce ion current between the inside surface and high-voltage conducting wires to be measured of cylinder electrode;
3) get a sampling resistor, signal wire connection metal film is passed through, other end ground connection in one end of sampling resistor; The two ends of sampling resistor are connected in parallel a voltage table;
4) regulate the output voltage of high-voltage DC power supply, record the reading of DC electric field measurement instrument and the reading of voltage table simultaneously; The reading of DC electric field measurement instrument is the total electric field strength at cylinder electrode place; According to reading and the formula of voltage table
obtain ion current density; Formula
in, J is ion current density; U
rfor the reading of voltage table; R is the resistance value of sampling resistor; S is the area of metallic film;
5) step 4 is utilized) total electric field strength, the ion current density at cylinder electrode place that obtain, according to formula
obtain the total electric field strength on high-voltage conducting wires surface to be measured; Formula
in, E
1for the total electric field strength on high-voltage conducting wires surface to be measured; E
2for the reading of DC electric field measurement instrument; R
1for the radius of high-voltage conducting wires to be measured; R
2for the radius of cylinder electrode; K is ion mobility; ε is the specific inductive capacity of air;
6) the total electric field strength E on high-voltage conducting wires surface to be measured is utilized
1, according to Peek formula
obtain the coefficient of roughness of high-voltage conducting wires to be measured; Peek formula
in, m is the coefficient of roughness of high-voltage conducting wires to be measured; δ is the relative density of air.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106054049A (en) * | 2016-06-17 | 2016-10-26 | 华北电力大学 | Surface pollution accumulation conductor, controllable conductor surface pollution accumulation method and system |
| CN106848925A (en) * | 2017-03-16 | 2017-06-13 | 中国电力科学研究院 | High voltage operations folding ladder |
| CN108846193A (en) * | 2018-06-08 | 2018-11-20 | 华北电力大学（保定） | A kind of calculation method for the HVDC transmission line formate field intensity and ion current density considering real-time weather conditions |
| CN109387755A (en) * | 2018-12-12 | 2019-02-26 | 国网山东省电力公司电力科学研究院 | A kind of high voltage direct current corona discharge characteristic experimental apparatus system |
| CN110672712A (en) * | 2019-10-22 | 2020-01-10 | 哈尔滨工业大学 | Atmospheric ion mobility measuring device and method based on cylindrical electrode |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2694287Y (en) * | 2004-03-09 | 2005-04-20 | 中国科学院空间科学与应用研究中心 | Calibration device of electric field measuring apparatus |
| US20060279290A1 (en) * | 2001-03-14 | 2006-12-14 | Swenson Jody A | Electric-field meter having current compensation |
| CN102445639A (en) * | 2011-09-22 | 2012-05-09 | 华北电力大学 | Split conductor ion flow space distribution measuring method and device |
| CN202502165U (en) * | 2012-03-23 | 2012-10-24 | 上海市电力公司 | Uniform ion current density detection apparatus |
| CN103135086A (en) * | 2013-02-20 | 2013-06-05 | 华北电力大学 | Calibration device and calibration and verification method for direct current electric field measuring apparatus |
-
2015
- 2015-10-21 CN CN201510686248.2A patent/CN105203021B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060279290A1 (en) * | 2001-03-14 | 2006-12-14 | Swenson Jody A | Electric-field meter having current compensation |
| CN2694287Y (en) * | 2004-03-09 | 2005-04-20 | 中国科学院空间科学与应用研究中心 | Calibration device of electric field measuring apparatus |
| CN102445639A (en) * | 2011-09-22 | 2012-05-09 | 华北电力大学 | Split conductor ion flow space distribution measuring method and device |
| CN202502165U (en) * | 2012-03-23 | 2012-10-24 | 上海市电力公司 | Uniform ion current density detection apparatus |
| CN103135086A (en) * | 2013-02-20 | 2013-06-05 | 华北电力大学 | Calibration device and calibration and verification method for direct current electric field measuring apparatus |
Non-Patent Citations (2)
| Title |
|---|
| 祝艺嘉等: "基于同轴圆柱电极结构的直流合成电场的计算和测量", 《中国电机工程学会高电压专业委员会2015年学术年会论文集》 * |
| 邹志龙等: "空间电荷对旋转式直流电场仪测量准确性的影响", 《中国电机工程学报》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106054049A (en) * | 2016-06-17 | 2016-10-26 | 华北电力大学 | Surface pollution accumulation conductor, controllable conductor surface pollution accumulation method and system |
| CN106054049B (en) * | 2016-06-17 | 2018-10-23 | 华北电力大学 | A kind of method and system of surface contamination conducting wire, controllable conductive line surfaces contamination |
| CN106848925A (en) * | 2017-03-16 | 2017-06-13 | 中国电力科学研究院 | High voltage operations folding ladder |
| CN106848925B (en) * | 2017-03-16 | 2020-01-03 | 中国电力科学研究院 | High-voltage operation folding ladder |
| CN108846193A (en) * | 2018-06-08 | 2018-11-20 | 华北电力大学（保定） | A kind of calculation method for the HVDC transmission line formate field intensity and ion current density considering real-time weather conditions |
| CN108846193B (en) * | 2018-06-08 | 2022-08-30 | 华北电力大学（保定） | Method for calculating composite field intensity and ion current density of high-voltage direct-current transmission line considering real-time climate conditions |
| CN109387755A (en) * | 2018-12-12 | 2019-02-26 | 国网山东省电力公司电力科学研究院 | A kind of high voltage direct current corona discharge characteristic experimental apparatus system |
| CN110672712A (en) * | 2019-10-22 | 2020-01-10 | 哈尔滨工业大学 | Atmospheric ion mobility measuring device and method based on cylindrical electrode |
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