CN209656837U - A high-voltage direct current corona discharge characteristics experimental device system - Google Patents

Abstract

The utility model relates to a kind of high voltage direct current corona discharge characteristic experimental apparatus systems, including simulated high-pressure conducting wire (1), it is grounded pole plate (2), insulating support (3), high voltage power supply (4), formate field intensity tester (5), ion stream tester (6), corona current sampler (7), electrical parameter monitor (8) and high-voltage connection (13), shielding ball (11) is provided on the outside of the both ends of simulated high-pressure conducting wire (1), shielding cap (12) are equipped in the both ends inner sleeve of simulated high-pressure conducting wire (1), simulated high-pressure conducting wire (1) is connected to high-voltage connection (13) by shielding ball (11) and shielding cap (12), high-voltage connection (13) is connected to high voltage power supply (4).The utility model realizes the simulated experiment of high-voltage conducting wires flash-over characteristic over the ground indoors or in small space, has the advantages of simple structure and easy realization, can provide scientific basis for electric power transmission line design.

Description

A high-voltage direct current corona discharge characteristics experimental device system

technical field

The utility model belongs to the technical field of high voltage transmission, in particular to a direct current high voltage corona discharge characteristic experimental device system.

Background technique

The power industry is the foundation of national economic development. Due to the reverse distribution of energy and productivity in my country, energy transportation has been in a state of tension for a long time, and it must rely on UHV power grids to achieve long-distance and large-capacity energy transmission. The development of a national large power grid project with UHV and UHV power grids as the backbone is the future. The inevitable choice for the development of my country's power grid. Whether it is a DC transmission line or an AC transmission line, when the electric field near the high-voltage conductor exceeds the air breakdown field strength threshold, corona will appear around the transmission line. In the AC line, the corona discharge produces positive and negative charged particles, and the space charge will be limited to a small range near the wire to move back and forth due to the periodic change of the wire voltage, so it has little effect on the ground electric field. When corona discharge occurs on the DC transmission line, the charged particles with opposite polarity to the wire will move to the high-voltage electrode under the action of the electric field force, and restore electrical neutrality due to the surface reaction; at the same time, the charged particles with the same polarity as the wire Due to the repulsive effect, it will continuously move to the outside of the wire, forming a synthetic field strength in space and on the ground, which requires that the synthetic field strength cannot affect ground animals and plants. The high-voltage wire is equivalent to a wire-plate electrode structure to the ground, which constitutes an extremely uneven electric field. When a high voltage is applied to the wire, it is very easy to generate corona discharge around the high-voltage wire, resulting in power loss during the power transmission process. Therefore, the study suppresses The method of corona discharge causing power loss is an important topic for researchers related to electrical engineering. However, the voltage level of ultra-high voltage or ultra-high voltage transmission is high, even reaching above 1000kV. For researchers who carry out high-voltage transmission and wires and other related fields, the difficulty of research technology and the cost of experiments are very high.

In addition, even if the laboratory has the conditions to carry out relevant research, it can only simulate the actual working conditions. However, due to the fact that there may be some sharp points (such as the sharp ends of the high-voltage wires, high-voltage introduction points), The small size of the plate leads to factors such as edge effects, and these uncertain factors directly affect the authenticity of the test results.

Utility model content

In order to overcome the problems of the high voltage level of the field experiment, the tip discharge of the simulated experiment electrode and the high-voltage lead-in end, and the edge effect of the ground plate, the utility model provides a high-voltage corona discharge characteristic experimental device system for carrying out in the laboratory. Scientific research on relevant content.

A high-voltage corona discharge characteristic experimental device system of the utility model includes a simulated high-voltage wire, a grounding plate, an insulating support, a high-voltage power supply, a synthetic field strength tester, an ion current tester, a corona current sampler, and an electrical parameter monitor and high-voltage lead wires; the insulating support includes four vertical struts and four horizontal struts, each horizontal strut is fixed between two vertical struts, and the four horizontal struts form a rectangle, and the simulated high voltage The two ends of the wire are respectively arranged on two opposite horizontal poles, shielding balls are arranged on the outside of both ends of the simulated high-voltage wire, and shielding caps are set on the inside of both ends of the simulated high-voltage wire. The high-voltage wire is connected to the high-voltage lead through the shielding ball and the shielding cap, and the high-voltage lead is connected to the high-voltage power supply; the grounding plate is arranged under the simulated high-voltage wire, and the grounding plate is rectangular, and its plane Parallel to the rectangle formed by the four horizontal struts of the insulating support, the four corners of the grounding plate are provided with perforations, and the four vertical struts of the insulating support respectively pass through the perforations.

The synthetic field strength tester and the ion current tester are arranged on the ground plate, directly below and on both sides of the simulated high voltage wire.

The ion current tester is connected to the electrical parameter monitor through the corona current sampler.

The synthetic field strength tester is connected to the electrical parameter monitor.

The corona current sampler is connected to a ground wire.

The ion current tester, the synthetic field strength tester and the grounding plate are connected to the grounding wire in parallel.

The high voltage power supply is connected to a ground line.

The high-voltage corona discharge characteristic experimental device system also includes a radio interference tester, and the radio interference tester is connected to the electrical parameter monitor.

The high-voltage corona discharge characteristic experimental device system also includes a noise tester, and the noise tester is connected to the electrical parameter monitor.

The width of the grounding plate is greater than or equal to 4 times the distance between the simulated high-voltage wire and the grounding plate (W≧4d).

The long side of the ground plate is a curved side.

The bending radius of the long side is greater than or equal to 0.5 times the distance between the simulated high-voltage wire and the grounding plate (r≧0.5d).

The long edge of the ground plate is coated with insulating material.

The length of the simulated high-voltage wire is 1m, the diameter is 1mm-10mm, the width W of the ground plate is 2.5m, and the length is 1.5m. The distance between the simulated high-voltage wire and the ground electrode can be adjusted within the range of 35cm-50cm. Place the screw to tighten the simulated high-voltage wire at the end.

The utility model adopts the following technical solutions to make the above-mentioned experimental device system:

An electrode structure of a high-voltage corona discharge characteristic experimental device system is based on the known condition of the electric field intensity of the corona discharge at the beginning of the high-voltage wire, and according to the relationship between the electric field intensity at the beginning of the discharge, the electrode distance, and the voltage of the wire-plate electrode structure, Calculate the electrode spacing and power supply voltage level, make the electrode structure and equip the experimental system.

The first is the fabrication of the electrode structure:

The first step is to obtain the electric field strength of the ground and the surface electric field strength of the high-voltage wire through the electromagnetic field theory according to the safe distance of different high-voltage levels to the ground. The distance from the grounding plate, the rated output of the high-voltage power supply, the diameter of the simulated high-voltage wire and the adjustment range of the distance from the grounding plate.

The second step is to calculate the diameter corresponding to when the surface electric field of the shielding ball or shielding cap of the ball-plate, rod-plate electrode structure is less than 70% of the breakdown electric field strength in this environment, and the calculated value of the diameter is Basic design shielding ball or shielding cap. Among them, the middle opening of the shielding ball is placed on the outer two ends of the simulated high-voltage wire on the insulating support, and the shielding cap is placed on the inner two ends of the simulated high-voltage wire on the insulating support. The equipotential connection is carried out by the cap, which suppresses the tip discharge at both ends of the simulated high-voltage wire, and only simulates the discharge of the high-voltage wire itself.

The third step is to calculate the distance between the simulated high-voltage wire and the grounding plate based on the breakdown field strength on the surface of the high-voltage wire according to the analysis of the Rock discharge theory. Then design and manufacture the size of the grounding plate. Generally, the width of the grounding plate is greater than or equal to 4 times the distance between the simulated high-voltage wire and the grounding plate (W≧4d). Finally, design the long side parallel to the simulated high-voltage wire. The long side can be made into a curved side. The bending radius of the curved side is greater than or equal to 0.5 times the distance between the simulated high-voltage wire and the grounding plate (r≧0.5d). The edge of the grounding plate can be coated with insulating material to suppress the edge effect of the grounding plate.

The fourth step is to install the simulated high-voltage wire and the grounding plate of the determined size on the insulating support.

Followed by the test system installation:

The first step is to install an electrical parameter test system, including installing an ion current tester and a synthetic field strength tester on the ground plate directly below the simulated high-voltage wire and on both sides (or one side) for testing the simulated The ion flow and resultant field strength generated when the high-voltage wire discharges to the grounded plate. Use an ammeter to test the discharge current received by the grounded plate, or use Ohm’s law to calculate the current received by the grounded plate through a resistance sampling device and a voltmeter to test the corona current.

The second step is to install an environmental parameter testing system, including testing the electromagnetic field and noise characteristics generated by simulating the discharge of high-voltage wires to the ground through analytical instruments such as electromagnetic field and noise. By adjusting the positions of these analytical instruments, the distribution characteristics of the electromagnetic field and noise on both sides of the simulated high-voltage wire can be tested.

The third step, circuit connection, connects the high-voltage power supply (such as positive polarity high-voltage power supply, negative polarity high-voltage power supply, bipolar DC high-voltage power supply, AC high-voltage power supply) with the analog high-voltage wire through the high-voltage lead; The synthetic field strength tester and the grounding plate are connected in parallel to the grounding pole of the laboratory.

The beneficial effect of the utility model is to realize the simulation experiment of the discharge characteristics of high-voltage wires to the ground in the room or in a small space, including experiments on ion current, synthetic field strength, electromagnetic noise, etc., and has the advantages of simple structure, low voltage level, and easy realization. It can provide a scientific basis for the design of high-voltage, ultra-high voltage, and ultra-high voltage power transmission lines.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can also be obtained based on these drawings without any creative effort.

Fig. 1 is a schematic diagram of the high-voltage corona discharge characteristic experimental device system of the present invention.

Fig. 2 is a cross-sectional view of an electrode structure of an arc-edge grounding plate.

Fig. 3 is a cross-sectional view of an electrode structure of an insulated-edge grounding plate.

Among them, the meanings of reference signs are as follows:

1 simulated high-voltage wire, 2 grounding plate, 3 insulating support, 4 high-voltage power supply, 5 synthetic field strength tester, 6 ion current tester, 7 corona current sampler, 8 electrical parameter monitor, 9 radio signal tester, 10 noise tester, 11 shielding ball, 12 shielding cap, 13 high voltage lead wire, 14 ground wire

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

Embodiments of the present utility model are described below in conjunction with FIG. 1 , FIG. 2 and FIG. 3 , and the embodiments described here are only used to illustrate and explain the present utility model, and are not limited to the present utility model.

As shown in Figure 1, the high-voltage corona discharge characteristic experimental device system includes a simulated high-voltage wire 1, a grounding plate 2, an insulating support 3, a high-voltage power supply 4, a synthetic field strength tester 5, an ion current tester 6, and a corona current tester. Sampler 7, electrical parameter monitor 8 and high voltage lead 13.

As shown in Figure 2, it shows a cross-sectional view of the electrode structure of the arc-edge grounding plate, wherein the long side of the grounding plate 2 is a curved side, and the bending radius r of the long side is greater than or equal to the simulated high-voltage wire 1 and the grounding electrode 0.5 times the distance d between plates 2.

As shown in FIG. 3 , it shows a cross-sectional view of the electrode structure of an insulating-edge grounding plate, where the long edge of the grounding plate 2 is coated with an insulating material to suppress the edge effect of the grounding plate.

In the process of making the high-voltage corona discharge characteristic experimental device system, firstly, the electrode structure is made: calculate and determine the distance d between the simulated high-voltage wire 1 and the grounding plate 2, the rated output of the high-voltage power supply, the wire diameter of the simulated high-voltage wire 1 and Calculate the diameter of the shielding ball 11 and the shielding cap 12 for the adjustment range of the distance d between it and the grounding plate; put the middle opening of the shielding ball 11 on the outer two ends of the simulated high-voltage wire 1 on the insulating support 3, and the shielding cap 12 is placed on the The inner two ends of the simulated high-voltage wire 1 on the insulating bracket 3; the simulated high-voltage wire 1 and the grounding plate 2 are installed on the insulating bracket 3.

Next, the test system is installed: on the grounding plate 2, the ion current tester 6 and the synthetic field strength tester 5 are installed directly below the simulated high-voltage wire 1 and both sides thereof; the radio interference tester 9 and the noise tester are installed 10. Connect the high-voltage power supply 4 to the analog high-voltage wire 1 through the high-voltage lead wire 13; connect the ion current tester 6, the synthetic field strength tester 5, and the grounding plate 2 to the laboratory ground in parallel through the wires.

According to Pick's discharge theory, calculate the diameter corresponding to the surface electric field of the shielding ball or shielding cap of the ball-plate, rod-plate electrode structure is less than 70% of the breakdown electric field intensity in this environment, and design the shielding ball based on the calculated value of the diameter or shielding caps.

The width of the grounding plate is designed to be greater than or equal to 4 times the distance between the simulated high-voltage wire and the grounding plate (W≧4d).

Use an ammeter to test the discharge current received by the grounded plate, or use Ohm’s law to calculate the current received by the grounded plate through a resistance sampling device and a voltmeter to test the corona current.

Example 1

The insulating support 3 includes four vertical struts and four horizontal struts, each horizontal strut is fixed between two vertical struts, the four horizontal struts form a rectangle, and the two ends of the simulated high-voltage conductor 1 are respectively set on two opposite horizontal struts.

Shielding balls 11 are provided outside the two ends of the simulated high-voltage wire 1, and shielding caps 12 are sleeved inside the two ends of the simulated high-voltage wire 1, and the simulated high-voltage wire 1 passes through the shielding ball 11 and the shielding cap. 12 is connected to the high-voltage lead 13 , and the high-voltage lead 13 is connected to the high-voltage power supply 4 .

The grounding plate 2 is arranged below the simulated high-voltage wire 1. The grounding plate is rectangular, and its plane is parallel to the rectangle formed by the four horizontal poles of the insulating support. The four corners of the grounding plate are provided with perforations. The four vertical pillars of the insulating support pass through the through holes respectively.

The length of the simulated high-voltage wire 1 is 1m, the diameter is 1mm, the width W of the grounding plate is 2.5m, and the length is 1.5m. Simulate the screw of high voltage wire 1.

The synthetic field strength tester 5 and the ion current tester 6 are placed at different positions on the grounding plate 2 to measure the synthetic field strength and ion current density at different positions, and the experimental data are read through the electrical parameter monitor 8 .

The radio interference tester 9 and the noise tester 10 are placed at different positions around the electrode structure system, and can test electromagnetic fields and noise signals at different positions. By adjusting the positions of these analytical instruments, the distribution characteristics of the electromagnetic field and noise on both sides of the simulated high-voltage wire can be tested.

The high-voltage power supply 4 is connected to the simulated high-voltage wire 1 at the screw at one end of the insulating support 3 through the high-voltage lead wire 13;

The middle opening of the shielding ball 11 is set on the screw on the insulating support 3, the simulated high-voltage wire 1, the high-voltage lead 13 and the screw are embedded in the shielding ball, and the shielding cap 12 is the simulated high-voltage wire 1 coaxially sleeved on the insulating support 3 The inner two ends of the shielding ball 11 have a diameter of 10cm, and the shielding cap 12 has a diameter of 2cm and a length of 3cm. The analog high-voltage wire 1 and the high-voltage lead wire 13 are equipotentially connected between the shielding ball 11 and the shielding cap 12, which suppresses the tip discharge at both ends of the analog high-voltage wire, and only the analog high-voltage wire itself discharges.

Example 2

The insulating support 3 includes four vertical struts and four horizontal struts, each horizontal strut is fixed between two vertical struts, the four horizontal struts form a rectangle, and the two ends of the simulated high-voltage conductor 1 are respectively set on two opposite horizontal struts.

Shielding balls 11 are provided outside the two ends of the simulated high-voltage wire 1, and shielding caps 12 are sleeved inside the two ends of the simulated high-voltage wire 1, and the simulated high-voltage wire 1 passes through the shielding ball 11 and the shielding cap. 12 is connected to the high-voltage lead 13 , and the high-voltage lead 13 is connected to the high-voltage power supply 4 .

The grounding plate 2 is arranged below the simulated high-voltage wire 1. The grounding plate is rectangular, and its plane is parallel to the rectangle formed by the four horizontal poles of the insulating support. The four corners of the grounding plate are provided with perforations. The four vertical pillars of the insulating support pass through the through holes respectively.

The length of the simulated high-voltage wire 1 is 1m, the diameter is 5mm, the width W of the grounding plate is 2.5m, and the length is 1.5m. The distance between the simulated high-voltage wire 1 and the ground electrode 2 is 35cm. Simulate the screw of high voltage wire 1.

The synthetic field strength tester 5 and the ion current tester 6 are placed at different positions on the grounding plate 2 to measure the synthetic field strength and ion current density at different positions, and the experimental data are read through the electrical parameter monitor 8 .

The radio interference tester 9 and the noise tester 10 are placed at different positions around the electrode structure system, and can test electromagnetic fields and noise signals at different positions. By adjusting the positions of these analytical instruments, the distribution characteristics of the electromagnetic field and noise on both sides of the simulated high-voltage wire can be tested.

The high-voltage power supply 4 is connected to the simulated high-voltage wire 1 at the screw at one end of the insulating support 3 through the high-voltage lead wire 13;

The middle opening of the shielding ball 11 is set on the screw on the insulating support 3, the simulated high-voltage wire 1, the high-voltage lead 13 and the screw are embedded in the shielding ball, and the shielding cap 12 is the simulated high-voltage wire 1 coaxially sleeved on the insulating support 3 The inner two ends of the shielding ball 11 have a diameter of 10cm, and the shielding cap 12 has a diameter of 2cm and a length of 3cm. The analog high-voltage wire 1 and the high-voltage lead wire 13 are equipotentially connected between the shielding ball 11 and the shielding cap 12, which suppresses the tip discharge at both ends of the analog high-voltage wire, and only the analog high-voltage wire itself discharges.

Example 3

The insulating support 3 includes four vertical struts and four horizontal struts, each horizontal strut is fixed between two vertical struts, the four horizontal struts form a rectangle, and the two ends of the simulated high-voltage conductor 1 are respectively set on two opposite horizontal struts.

Shielding balls 11 are provided outside the two ends of the simulated high-voltage wire 1, and shielding caps 12 are sleeved inside the two ends of the simulated high-voltage wire 1, and the simulated high-voltage wire 1 passes through the shielding ball 11 and the shielding cap. 12 is connected to the high-voltage lead 13 , and the high-voltage lead 13 is connected to the high-voltage power supply 4 .

The grounding plate 2 is arranged below the simulated high-voltage wire 1. The grounding plate is rectangular, and its plane is parallel to the rectangle formed by the four horizontal poles of the insulating support. The four corners of the grounding plate are provided with perforations. The four vertical pillars of the insulating support pass through the through holes respectively.

The length of the simulated high-voltage wire 1 is 1m, the diameter is 10mm, the width W of the ground plate is 2.5m, and the length is 1.5m. The distance between the simulated high-voltage wire 1 and the ground electrode 2 is 35cm. Simulate the screw of high voltage wire 1.

The synthetic field strength tester 5 and the ion current tester 6 are placed at different positions on the grounding plate 2 to measure the synthetic field strength and ion current density at different positions, and the experimental data are read through the electrical parameter monitor 8 .

The radio interference tester 9 and the noise tester 10 are placed at different positions around the electrode structure system, and can test electromagnetic fields and noise signals at different positions. By adjusting the positions of these analytical instruments, the distribution characteristics of the electromagnetic field and noise on both sides of the simulated high-voltage wire can be tested.

The high-voltage power supply 4 is connected to the simulated high-voltage wire 1 at the screw at one end of the insulating support 3 through the high-voltage lead wire 13;

The middle opening of the shielding ball 11 is set on the screw on the insulating support 3, the simulated high-voltage wire 1, the high-voltage lead 13 and the screw are embedded in the shielding ball, and the shielding cap 12 is the simulated high-voltage wire 1 coaxially sleeved on the insulating support 3 The inner two ends of the shielding ball 11 have a diameter of 10cm, and the shielding cap 12 has a diameter of 2cm and a length of 3cm. The analog high-voltage wire 1 and the high-voltage lead wire 13 are equipotentially connected between the shielding ball 11 and the shielding cap 12, which suppresses the tip discharge at both ends of the analog high-voltage wire, and only the analog high-voltage wire itself discharges.

Example 4

The insulating support 3 includes four vertical struts and four horizontal struts, each horizontal strut is fixed between two vertical struts, the four horizontal struts form a rectangle, and the two ends of the simulated high-voltage conductor 1 are respectively set on two opposite horizontal struts.

Shielding balls 11 are provided outside the two ends of the simulated high-voltage wire 1, and shielding caps 12 are sleeved inside the two ends of the simulated high-voltage wire 1, and the simulated high-voltage wire 1 passes through the shielding ball 11 and the shielding cap. 12 is connected to the high-voltage lead 13 , and the high-voltage lead 13 is connected to the high-voltage power supply 4 .

The grounding plate 2 is arranged below the simulated high-voltage wire 1. The grounding plate is rectangular, and its plane is parallel to the rectangle formed by the four horizontal poles of the insulating support. The four corners of the grounding plate are provided with perforations. The four vertical pillars of the insulating support pass through the through holes respectively.

The length of the simulated high-voltage wire 1 is 1m, the diameter is 1mm, the width W of the grounding plate is 2.5m, and the length is 1.5m. The distance between the simulated high-voltage wire 1 and the ground electrode 2 is 50cm. Simulate the screw of high voltage wire 1.

The synthetic field strength tester 5 and the ion current tester 6 are placed at different positions on the grounding plate 2 to measure the synthetic field strength and ion current density at different positions, and the experimental data are read through the electrical parameter monitor 8 .

The radio interference tester 9 and the noise tester 10 are placed at different positions around the electrode structure system, and can test electromagnetic fields and noise signals at different positions. By adjusting the positions of these analytical instruments, the distribution characteristics of the electromagnetic field and noise on both sides of the simulated high-voltage wire can be tested.

The high-voltage power supply 4 is connected to the simulated high-voltage wire 1 at the screw at one end of the insulating support 3 through the high-voltage lead wire 13;

The middle opening of the shielding ball 11 is set on the screw on the insulating support 3, the simulated high-voltage wire 1, the high-voltage lead 13 and the screw are embedded in the shielding ball, and the shielding cap 12 is the simulated high-voltage wire 1 coaxially sleeved on the insulating support 3 The inner two ends of the shielding ball 11 have a diameter of 10cm, and the shielding cap 12 has a diameter of 2cm and a length of 3cm. The analog high-voltage wire 1 and the high-voltage lead wire 13 are equipotentially connected between the shielding ball 11 and the shielding cap 12, which suppresses the tip discharge at both ends of the analog high-voltage wire, and only the analog high-voltage wire itself discharges.

Example 5

The insulating support 3 includes four vertical struts and four horizontal struts, each horizontal strut is fixed between two vertical struts, the four horizontal struts form a rectangle, and the two ends of the simulated high-voltage conductor 1 are respectively set on two opposite horizontal struts.

Shielding balls 11 are provided outside the two ends of the simulated high-voltage wire 1, and shielding caps 12 are sleeved inside the two ends of the simulated high-voltage wire 1, and the simulated high-voltage wire 1 passes through the shielding ball 11 and the shielding cap. 12 is connected to the high-voltage lead 13 , and the high-voltage lead 13 is connected to the high-voltage power supply 4 .

The grounding plate 2 is arranged below the simulated high-voltage wire 1. The grounding plate is rectangular, and its plane is parallel to the rectangle formed by the four horizontal poles of the insulating support. The four corners of the grounding plate are provided with perforations. The four vertical pillars of the insulating support pass through the through holes respectively.

The length of the simulated high-voltage wire 1 is 1m, the diameter is 5mm, the width W of the grounding plate is 2.5m, and the length is 1.5m. Simulate the screw of high voltage wire 1.

The synthetic field strength tester 5 and the ion current tester 6 are placed at different positions on the grounding plate 2 to measure the synthetic field strength and ion current density at different positions, and the experimental data are read through the electrical parameter monitor 8 .

The radio interference tester 9 and the noise tester 10 are placed at different positions around the electrode structure system, and can test electromagnetic fields and noise signals at different positions. By adjusting the positions of these analytical instruments, the distribution characteristics of the electromagnetic field and noise on both sides of the simulated high-voltage wire can be tested.

The high-voltage power supply 4 is connected to the simulated high-voltage wire 1 at the screw at one end of the insulating support 3 through the high-voltage lead wire 13;

The middle opening of the shielding ball 11 is set on the screw on the insulating support 3, the simulated high-voltage wire 1, the high-voltage lead 13 and the screw are embedded in the shielding ball, and the shielding cap 12 is the simulated high-voltage wire 1 coaxially sleeved on the insulating support 3 The inner two ends of the shielding ball 11 have a diameter of 10cm, and the shielding cap 12 has a diameter of 2cm and a length of 3cm. The analog high-voltage wire 1 and the high-voltage lead wire 13 are equipotentially connected between the shielding ball 11 and the shielding cap 12, which suppresses the tip discharge at both ends of the analog high-voltage wire, and only the analog high-voltage wire itself discharges.

Example 6

The insulating support 3 includes four vertical struts and four horizontal struts, each horizontal strut is fixed between two vertical struts, the four horizontal struts form a rectangle, and the two ends of the simulated high-voltage conductor 1 are respectively set on two opposite horizontal struts.

Shielding balls 11 are provided outside the two ends of the simulated high-voltage wire 1, and shielding caps 12 are sleeved inside the two ends of the simulated high-voltage wire 1, and the simulated high-voltage wire 1 passes through the shielding ball 11 and the shielding cap. 12 is connected to the high-voltage lead 13 , and the high-voltage lead 13 is connected to the high-voltage power supply 4 .

The grounding plate 2 is arranged below the simulated high-voltage wire 1. The grounding plate is rectangular, and its plane is parallel to the rectangle formed by the four horizontal poles of the insulating support. The four corners of the grounding plate are provided with perforations. The four vertical pillars of the insulating support pass through the through holes respectively.

The length of the simulated high-voltage wire 1 is 1m, the diameter is 10mm, the width W of the grounding plate is 2.5m, and the length is 1.5m. Simulate the screw of high voltage wire 1.

The synthetic field strength tester 5 and the ion current tester 6 are placed at different positions on the grounding plate 2 to measure the synthetic field strength and ion current density at different positions, and the experimental data are read through the electrical parameter monitor 8 .

The radio interference tester 9 and the noise tester 10 are placed at different positions around the electrode structure system, and can test electromagnetic fields and noise signals at different positions. By adjusting the positions of these analytical instruments, the distribution characteristics of the electromagnetic field and noise on both sides of the simulated high-voltage wire can be tested.

The high-voltage power supply 4 is connected to the simulated high-voltage wire 1 at the screw at one end of the insulating support 3 through the high-voltage lead wire 13;

The middle opening of the shielding ball 11 is set on the screw on the insulating support 3, the simulated high-voltage wire 1, the high-voltage lead 13 and the screw are embedded in the shielding ball, and the shielding cap 12 is the simulated high-voltage wire 1 coaxially sleeved on the insulating support 3 The inner two ends of the shielding ball 11 have a diameter of 10cm, and the shielding cap 12 has a diameter of 2cm and a length of 3cm. The analog high-voltage wire 1 and the high-voltage lead wire 13 are equipotentially connected between the shielding ball 11 and the shielding cap 12, which suppresses the tip discharge at both ends of the analog high-voltage wire, and only the analog high-voltage wire itself discharges.

The applicant has explained and described the embodiments of the present utility model in detail in conjunction with the accompanying drawings, but those skilled in the art should understand that the above embodiments are only preferred implementations of the present utility model, and the detailed description is only to help readers better To understand the spirit of the utility model, but not to limit the scope of protection of the utility model, on the contrary, any improvement or modification based on the spirit of the utility model should fall within the scope of protection of the utility model.

Claims (13)

1. a kind of high voltage direct current corona discharge characteristic experimental apparatus system, it is characterised in that: including simulated high-pressure conducting wire (1), connect Ground pole plate (2), insulating support (3), high voltage power supply (4), formate field intensity tester (5), ion stream tester (6), corona current Sampler (7), electrical parameter monitor (8) and high-voltage connection (13)；The insulating support (3) includes four vertical supports and four Horizontal strut, every horizontal strut are fixed between two vertical supports, and four horizontal struts constitute rectangle, and the simulation is high The both ends of pressure conducting wire (1) are separately positioned on two opposite horizontal struts, on the outside of the both ends of the simulated high-pressure conducting wire (1) It is provided with shielding ball (11), is equipped with shielding cap (12) in the both ends inner sleeve of the simulated high-pressure conducting wire (1), the simulated high-pressure Conducting wire (1) is connected to the high-voltage connection (13) by the shielding ball (11) and shielding cap (12), the high-voltage connection (13) It is connected to the high voltage power supply (4)；Below the simulated high-pressure conducting wire (1), ground connection pole plate is in for ground connection pole plate (2) setting Rectangle, plane is parallel with the rectangle that four horizontal struts of insulating support are constituted, and four angles for being grounded pole plate are equipped with Perforation, four vertical supports of insulating support are each passed through the perforation；The length of the simulated high-pressure conducting wire is 1m, diameter 1mm-10mm, it is described ground connection pole plate width be 2.5m, length 1.5m.

2. high voltage direct current corona discharge characteristic experimental apparatus system according to claim 1, which is characterized in that the synthesis Field intensity tester (5) and the ion stream tester (6) are arranged on the ground connection pole plate (2), and it is high to be located at the simulation Press the underface and two sides of conducting wire (1).

3. high voltage direct current corona discharge characteristic experimental apparatus system according to claim 2, which is characterized in that the ion Current test instrument (6) is connected to the electrical parameter monitor (8).

4. high voltage direct current corona discharge characteristic experimental apparatus system according to claim 2, which is characterized in that the synthesis Field intensity tester (5) is connected to the electrical parameter monitor (8).

5. high voltage direct current corona discharge characteristic experimental apparatus system according to claim 2, which is characterized in that the corona Current sampler (7) is connected between ground connection pole plate (2) and ground line (14).

6. high voltage direct current corona discharge characteristic experimental apparatus system according to claim 2, which is characterized in that ion stream is surveyed Examination instrument (6), formate field intensity tester (5) and ground connection pole plate (2) are connected in parallel on ground line (14).

7. high voltage direct current corona discharge characteristic experimental apparatus system according to claim 1, which is characterized in that the high pressure Power supply (4) is connected to ground line (14).

8. high voltage direct current corona discharge characteristic experimental apparatus system according to claim 1, which is characterized in that further include nothing Line electrical interference tester (9), the radio interference tester (9) are connected to the electrical parameter monitor (8).

9. high voltage direct current corona discharge characteristic experimental apparatus system according to claim 1, which is characterized in that further include making an uproar Sound test instrument (10), the noise-measuring instrument (10) are connected to the electrical parameter monitor (8).

10. high voltage direct current corona discharge characteristic experimental apparatus system according to claim 1, which is characterized in that described to connect The width of ground pole plate (2) is more than or equal to 4 times of distance between simulated high-pressure conducting wire (1) and ground connection pole plate (2).

11. high voltage direct current corona discharge characteristic experimental apparatus system according to claim 1, which is characterized in that described to connect The long side of ground pole plate (2) is curl.

12. high voltage direct current corona discharge characteristic experimental apparatus system according to claim 11, which is characterized in that the length The bending radius on side is more than or equal to 0.5 times of distance between simulated high-pressure conducting wire (1) and ground connection pole plate (2).

13. high voltage direct current corona discharge characteristic experimental apparatus system according to claim 1, which is characterized in that described to connect The long side edge insulator-coating of ground pole plate (2).