CN111964885A - Performance testing device and method for high-voltage power transmission line disconnection protector - Google Patents

Abstract

The invention discloses a performance testing device and a performance testing method for a high-voltage power transmission line disconnection protector, wherein the performance testing device comprises a disconnection protector sample, two sides above the disconnection protector sample are respectively connected and fixed with a vertical counter-force support through damping springs, a cable penetrates through the inside of the disconnection protector sample, one side of the cable is fixedly connected with a steel wire rope through a wire clamp, the steel wire rope at the side is fixedly connected to an unloading pin, the unloading pin is fixed on a transverse counter-force seat, and an electric jack is arranged below the unloading pin. The device can be used for rapidly installing a power-off protector sample and a cable, realizing the holding action process of the broken cable and the power-off protector, acquiring the time-course data of the cable tension and the line running distance in real time, compiling analysis software by using an impact dynamics principle, rapidly analyzing and calculating dynamic response performance parameters such as holding trigger time, holding trigger speed, holding action time, broken cable line running distance and the like of the broken cable protector, and improving the test precision and the test efficiency.

Description

Performance testing device and method for high-voltage power transmission line disconnection protector

Technical Field

The invention relates to the technical field of power transmission and transformation, in particular to a device and a method for testing the performance of a high-voltage power transmission line disconnection protector.

Background

In the process of erecting a high-voltage power transmission line across important facilities, due to improper control of paying-off tension, the phenomenon of wire breakage and wire running occurs occasionally, and the phenomenon of whiplash caused by sudden tension release causes serious safety accidents and serious property loss. At present, a wire breakage protector is often installed and used in the process of erecting a high-voltage power transmission line, so that a wire is quickly clamped at the moment of wire breakage, impact energy is absorbed, and serious consequences caused by wire breakage gravity and tension release are prevented.

The holding trigger time, holding trigger speed, holding action time, broken line running distance and the like of the broken line protector are important performance parameters for measuring the effective work of the broken line protector, and the prior art has no accurate quantitative test device and method, only depending on experience judgment, has low efficiency and high erroneous judgment rate and has potential safety hazard.

Disclosure of Invention

The invention aims to provide a performance testing device and a performance testing method for a high-voltage power transmission line disconnection protector.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a performance testing device for a high-voltage power transmission line disconnection protector comprises a disconnection protector sample, wherein two sides above the disconnection protector sample are respectively connected and fixed with a vertical counter-force support through a damping spring, the wire break protector sample penetrates through the cable, one side of the cable is fixedly connected with a steel wire rope through a wire clamp, wherein the side steel wire rope is fixedly connected with the unloading pin, the unloading pin is fixed on the transverse counter-force seat, an electric jack is arranged below the unloading pin, the other side of the cable in the wire break protector sample is fixed with a steel wire rope through a wire clamp, the steel wire rope on the other side sequentially passes through a group of fixed pulley blocks to be connected to the axial force sensor, a counterweight is connected below the axial force sensor, a stay wire displacement sensor is arranged on the counterweight, the axial force sensor and the stay wire displacement sensor are connected to a dynamic acquisition and analysis system through lines.

The invention also discloses a testing method of the high-voltage power transmission line disconnection protector performance testing device,

the method comprises the following steps:

step one, adopting the components and the connecting structure of the testing device in claim 1, mounting the broken line protector sample and the testing cable on the testing device in a non-clasping state, realizing the application of the tension of the testing cable through a counterweight, and measuring the initial tension T of the testing cable by using an axial force sensor, a stay wire displacement sensor and a dynamic acquisition and analysis system₀And an initial position S₀；

Secondly, applying impact load to the unloading pin to enable the unloading pin to fall off quickly, releasing the tension of the cable suddenly, accelerating the sliding of the cable under the action of the gravity of the counterweight, triggering the wire breaking protector to clamp when the sliding speed reaches a certain value, and enabling the cable not to slide until the cable is clamped, wherein the cable is under the action of sudden tension, and in the process, the dynamic acquisition and analysis system continuously and synchronously acquires the values of the tension T of the cable to be tested and the displacement S of the counterweight along with the change of time;

and step three, programming analysis software by using the acquired time-course data of the tension T of the test cable and the displacement S of the counterweight according to an analysis method of the sudden-increasing and sudden-releasing load effect of the impact dynamics theory, and analyzing relevant dynamic performance parameters of the wire break protector sample, such as the holding trigger time, the holding trigger speed, the holding action time, the wire break distance and the like.

Compared with the prior art, the invention has the following beneficial effects:

according to the testing device and the testing method for the high-voltage power transmission line disconnection protector, the quick installation and the structural safety protection of a disconnection protector sample are realized through the damping spring, the releasing and the tension application of a cable can be conveniently realized through the pulley block and the counterweight, and the cable tension releasing process can be truly simulated through the unloading pin; by measuring the change of the cable tension and the sliding displacement along with the time, the dynamic response performance parameters of the disconnection protector are quickly analyzed and calculated based on the impact dynamics theory, and the test precision and the test efficiency are improved.

Drawings

FIG. 1 is a schematic structural diagram of a testing apparatus according to the present invention;

FIG. 2 is a flow chart of a testing method of the present invention;

FIG. 3 is a cable tension time course curve for a test of a sample of a wire break protector of a certain specification by using the device;

FIG. 4 is a simplified diagram of the performance analysis of a test sample of a protector for breaking wires of a certain specification by using the device;

in the figure: 1. a sample of the wire break protector; 2. a cable; 3. a damping spring; 4. a vertical counter-force support; 5. a wire clamping device; 6. a wire rope; 7. a transverse counter-force seat; 8. unloading the pin; 9. an electric jack; 10. a fixed pulley block; 11. an axial force sensor; 12. a counterweight; 13. a pull wire displacement sensor; 14. provided is a dynamic acquisition and analysis system.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with reference to the specific drawings.

The test device in fig. 1 is used for testing, and the types of the devices involved in the process are as follows: the system comprises a DH5937 dynamic acquisition and analysis system, a CL-YB-7 axial force sensor, an LX-XF04-1000 stay wire displacement sensor and an FY-YOL-30 electric jack, wherein the performance test is carried out on a broken wire protector sample with a certain specification, the quick installation of the broken wire protector sample and a cable is completed, the cable is tensioned and tension is applied, the broken wire and tension burst of the cable are simulated, the clasping action process of the broken wire protector sample is realized, the dynamic data of the cable tension and the wire running distance are continuously acquired in real time, and the relevant dynamic performance parameters of the broken wire protector sample, such as clasping trigger time, clasping trigger speed, clasping action time, the broken wire running distance and the like, are analyzed and calculated according to an impact dynamics theory.

Taking the performance test of a wire break protector sample of a certain specification as an example, as shown in fig. 1 and fig. 2, the specific test steps are as follows:

(1) according to the structural size of the wire break protector sample 1 of the specification, the positions of a vertical counter-force support 4 and a transverse counter-force support 7 are adjusted, the wire break protector sample 1 is installed on a counter-force frame by using a damping spring 3 in a non-clasping state, a wire cable 2 is connected with a steel wire rope 6 by using a wire clamp 5, and one end of a test wire cable is fixed on the transverse counter-force support 7 by using an unloading pin 8; paying off a cable by using the fixed pulley block 10; a 500kg counterweight 12 is selected to apply tension to the cable, wherein an axial force sensor 11 is arranged on a steel wire rope below the pulley, a pull wire displacement sensor 13 is arranged on the counterweight, the two are connected into a dynamic acquisition and analysis system 14, and the initial tension T of the cable is measured₀And an initial position S₀。

(2) An electric jack 9 is utilized to apply impact load to the unloading pin 8, so that the unloading pin can fall off quickly, the tension of the cable is released suddenly, and the cable 2 can slide in an accelerated way under the action of the gravity of a counterweight; when the sliding speed reaches a certain numerical value, the wire breaking protector is triggered to tightly hold the wire breaking protector until the wire breaking protector is completely tightly held, the cable does not slide under the action of sudden tension, and the counterweight gradually tends to be in a suspended static state; in the process, the sampling frequency of the dynamic acquisition and analysis system 14 is set to be 5kHz, and the change values of the tension T of the test cable and the displacement S of the counterweight along with the time are continuously and synchronously acquired.

(3) Aiming at the collected data, a test process curve is drawn by utilizing analysis software compiled based on an impact dynamics theory, and is shown in figure 3; and analyzing and calculating dynamic performance parameters of the broken line protector, such as the clasping trigger time, clasping trigger speed, clasping action time, broken line running distance and the like, as shown in fig. 4.

The results of the performance tests on a sample of a protector against a certain specification are shown in table 1:

TABLE 1 Performance test results for a protector test sample of a certain specification for a break line in accordance with an embodiment of the present invention

Initial tension	Hugging trigger time	Tightening trigger speed	Distance of track	Maximum tension of cable
					5kN	0.011s	2.489m/s	623mm	25.68kN

The foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (2)

1. The utility model provides a high voltage power transmission line protector capability test device that breaks which characterized in that: including the broken string protector sample, broken string protector sample top both sides be connected fixedly through damping spring and vertical counter-force support respectively, the broken string protector sample inside pass cable and cable one side through tension disk fixedly connected with wire rope, wherein this side wire rope fixed connection is on the uninstallation round pin, the uninstallation round pin fix on horizontal counter-force seat and uninstallation round pin below be equipped with electric jack, the inside cable opposite side of broken string protector sample be fixed with wire rope and opposite side wire rope through the tension disk and pass a set of crown block in proper order and be connected to the axle force sensor on, axle force sensor below connect the counterweight, the counterweight on be equipped with the displacement sensor that acts as go-between, axle force sensor and the displacement sensor that acts as go-between all be connected to on the dynamic collection analytic system through the circuit.

2. A test method of a performance test device of a high-voltage power transmission line disconnection protector is characterized in that,

the method comprises the following steps:

step one, adopting the components and the connecting structure of the testing device in claim 1, mounting the broken line protector sample and the testing cable on the testing device in a non-clasping state, realizing the application of the tension of the testing cable through a counterweight, and measuring the initial tension T of the testing cable by using an axial force sensor, a stay wire displacement sensor and a dynamic acquisition and analysis system₀And an initial position S₀；

Secondly, applying impact load to the unloading pin to enable the unloading pin to fall off quickly, releasing the tension of the cable suddenly, accelerating the sliding of the cable under the action of the gravity of the counterweight, triggering the wire breaking protector to clamp when the sliding speed reaches a certain value, and enabling the cable not to slide until the cable is clamped, wherein the cable is under the action of sudden tension, and in the process, the dynamic acquisition and analysis system continuously and synchronously acquires the values of the tension T of the cable to be tested and the displacement S of the counterweight along with the change of time;

and step three, programming analysis software by using the acquired time-course data of the tension T of the test cable and the displacement S of the counterweight according to an analysis method of the sudden-increasing and sudden-releasing load effect of the impact dynamics theory, and analyzing relevant dynamic performance parameters of the wire break protector sample, such as the holding trigger time, the holding trigger speed, the holding action time, the wire break distance and the like.

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