CN110749807A - A 500kV Zinc Oxide Arrester High Altitude Test Device - Google Patents

Abstract

The invention discloses a 500kV high-altitude testing device for zinc oxide arresters, which comprises an insulating rod, a measuring electrode, a testing wire supporting insulating rod, a high-voltage testing wire, a DC generator, and a generator controller; one end of the horizontal high-voltage testing wire supporting the insulating rod, The measuring electrode is set on the top of the insulating rod by tightening the screw, and the other end of the test wire supports the insulating rod is fixed with a U-shaped groove. One end of the high-voltage test wire is connected to the measuring electrode, and the other end is connected to the DC generator through the U-shaped groove. The controller is connected with the DC generator to control the voltage; the invention can effectively avoid the time-wasting of repeated wiring due to insufficient angle of the pressure line, and improve the test efficiency.

Description

A 500kV Zinc Oxide Arrester High Altitude Test Device

technical field

The invention relates to the technical field of electrical measurement, in particular to a high-altitude testing device for 500kV zinc oxide arresters.

Background technique

The 500kV arrester is one of the important electrical equipments in the power system. It plays a very important role in the safe operation of the power system when lightning strikes overvoltage or operating overvoltage occurs in the power grid. In order to make the arrester operate safely and reliably in the power system, it is necessary to carry out preventive tests on the arrester, the most important of which is the power failure measurement DC reference voltage and leakage current test items under 0.75 times the DC reference voltage.

In the field test process, since each time the test line is replaced, an aerial work vehicle needs to be used to ascend. In order to ensure the accuracy of the data, the test test line should maintain an included angle of 90° with the arrester, and there is no special test wiring tool to make the test line. The angle between the pressure line and the arrester casing is 90°, which does not meet the test wiring requirements. In addition to the influence of factors such as induced electricity, pressure equalizing ring and the position of the ground wire installed on the wire, the DC reference voltage of the arrester is tested on site and 0.75 times The leakage current under the DC reference voltage often exceeds the test data.

SUMMARY OF THE INVENTION

In order to overcome the deficiencies of the existing wiring methods and do not need to use an aerial work vehicle to climb up, the present invention uses an insulating rod to design a 500kV high-altitude testing device for zinc oxide arresters.

The high-altitude test device for 500kV zinc oxide arrester of the present invention includes an insulating rod, a measuring electrode, a test line supporting insulating rod, a high-voltage test line, a DC generator, and a generator controller. At the top of the insulating rod, a U-shaped groove is fixed on the other end of the test wire supporting the insulating rod. One end of the high-voltage test wire is connected to the measuring electrode, the other end is connected to the DC generator through the U-shaped groove, and the generator controller is connected to the DC generator. , used to control the magnitude of the voltage.

The insulating rod is a telescopic rod.

The measuring electrodes are arc electrodes.

One end of the high-voltage test wire is connected to the measuring electrode through a clip.

One end of the test line supporting insulating rod is provided with a hole, one end of the measuring electrode is provided with a hole, and the top end of the insulating rod is provided with a threaded hole, and the fastening screw passes through the hole on one end of the test line supporting insulating rod and the one end of the measuring electrode. The hole is arranged in the threaded hole on the top of the insulating rod, and the test wire supports the insulating rod and the measuring electrode is fixed on the top of the insulating rod.

The generator controller is a conventional commercial product, and the voltage is controlled according to a conventional method.

When in use, first extend the retractable insulating rod to the height of the measuring arrester; then adjust the angle between the measuring electrode, the test line supporting the insulating rod and the insulating rod by tightening the screws, so that the measuring electrode on the insulating rod can be connected with the upper and lower arresters. The connection between the metal parts is in good contact, and the angle between the measuring electrode, the high-voltage test line and the arrester is 90°; one end of the high-voltage test line is fixed on the measuring electrode by a clip, and the other end of the high-voltage test line is connected to the DC generator through a U-shaped groove. ; The generator controller is connected with the DC generator through the test signal connection line, that is, the pressure can be started, and the voltage level can be controlled by the generator controller.

Compared with the existing wiring device, the present invention has the beneficial effects that the tester does not need to use an aerial work vehicle, thereby avoiding the risk of falling from a height during the test; at the same time, it overcomes the inability of a person standing on the ground to pull the insulating rope to make the high-voltage test line. The included angle with the arrester is 90°, and the present invention can effectively avoid the time-wasting of repeated wiring due to the insufficient angle of the pressure line, and improve the test efficiency.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative labor;

Fig. 1 is the structural representation of the present invention;

Figure 2 is a schematic diagram of the use state of the device;

In the figure, 1-insulation rod; 2-measurement electrode; 3-arrester connecting metal part; 4-generator controller; 5-fastening screw; 6-test wire supporting insulating rod; 7-U-shaped groove; Line; 9-DC generator; 10-Test signal connection line; 11-Surge arrester.

Detailed ways

The present invention will be described in further detail below by examples;

Embodiment 1: As shown in Figure 1-2, the 500kV zinc oxide arrester high-altitude test device includes a retractable insulating rod 1, a measuring electrode 2, a generator controller 4, a test wire supporting insulating rod 6, a high-voltage test wire 8, The DC generator 9 has a hole on one end of the test lead supporting insulating rod 6, a hole on one end of the measuring electrode, a threaded hole on the top of the insulating rod 1, and the tightening screw 5 passes through the test lead on one end of the supporting insulating rod 6. The hole and the hole on one end of the measuring electrode are arranged in the threaded hole on the top of the insulating rod 1, that is, the test wire supports one end of the insulating rod 6, the measuring electrode 2 is relatively set on the top of the insulating rod 1 through the tightening screw 5, and the test wire supports the insulating rod. 6. A U-shaped slot 7 is fixed on the other end. One end of the high-voltage test line 8 is connected to the measuring electrode 2, and the other end is connected to the DC generator 9 through the U-shaped slot 7. The generator controller 4 is connected to the DC through the test signal connection line 10. The generator 9 is connected to control the magnitude of the voltage; the measuring electrodes are arc electrodes.

The method steps that the present invention uses on site are as follows:

Step 1: During the test, first extend the retractable insulating rod 1 to the height of the measuring arrester 11; The arc-shaped measuring electrode 2 on the insulating rod 1 can be in good contact with the connecting metal parts 3 of the upper and lower arresters, and the angle between the measuring electrode, the high-voltage test line and the arrester is 90°;

The second step: one end of the high-voltage test line 8 is fixed on the arc-shaped measuring electrode 2 through a clip, and the high-voltage test line 8 is connected to the DC generator 9 through the U-shaped groove 7;

The third step: connect the test signal connecting line 10 to the generator controller 4 and the DC generator 9 respectively;

Step 4: When the power is turned on, the pressure can be started, and the voltage is controlled by the generator controller 4. After the test is completed, the test device is removed.

The 500kV zinc oxide arrester high-altitude test device of the present invention eliminates the need for testers to use aerial work vehicles, thereby avoiding the risk of high-falling personnel during the test; at the same time, it overcomes the inability of people standing on the ground to pull the insulating rope to make the angle between the high-voltage test line and the arrester form an angle. 90°, the invention can effectively avoid the time-wasting of repeated wiring due to insufficient pressure line angle, and improve the test efficiency.

The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments, and the descriptions in the above-mentioned embodiments and the description are only to illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have Various changes and modifications fall within the scope of the claimed invention. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims (5)

1. A 500kV high-altitude testing device for zinc oxide arresters, characterized in that: comprising an insulating rod (1), a measuring electrode (2), a test wire supporting insulating rod (6), a high-voltage test wire (8), a DC generator (9 ), the generator controller (4), the test wire supports one end of the insulating rod (6), the measuring electrode (2) is relatively set on the top of the insulating rod (1) by tightening the screw (5), and the test wire supports the insulating rod (6) The other end is fixed with a U-shaped groove (7), one end of the high-voltage test wire (8) is connected to the measuring electrode (2), and the other end is connected to the DC generator (9) through the U-shaped groove (7), and the generator controller (4) Connect with the DC generator (9) to control the voltage. 2 . The high-altitude testing device for 500kV zinc oxide arrester according to claim 1 , wherein the insulating rod ( 1 ) is a telescopic rod. 3 . 3. The high-altitude testing device for 500kV zinc oxide arrester according to claim 1, wherein the measuring electrode is a circular arc electrode. 4. The 500kV zinc oxide arrester high-altitude test device according to claim 1, characterized in that: one end of the high-voltage test wire (8) is connected to the measuring electrode (2) through a clip. 5. The high-altitude testing device for 500kV zinc oxide arrester according to claim 1, characterized in that: a hole is formed on one end of the insulating rod (6) for the support of the test wire, and a hole is formed on one end of the measuring electrode, and the top of the insulating rod (1) is provided with a hole. There are threaded holes, and the tightening screw (5) passes through the hole on one end of the test lead supporting insulating rod (6), and the hole on one end of the measuring electrode is arranged in the threaded hole on the top of the insulating rod (1).

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