WO2022082557A1

WO2022082557A1 - Insulating composite cross arm aging test system

Info

Publication number: WO2022082557A1
Application number: PCT/CN2020/122670
Authority: WO
Inventors: 边美华; 彭家宁; 张兴森; 杨艺云; 李君华; 卢展强; 刘桂婵; 梁世容
Original assignee: 广西电网有限责任公司电力科学研究院
Priority date: 2020-10-22
Filing date: 2020-10-22
Publication date: 2022-04-28

Abstract

An insulating composite cross arm aging test system comprises a stress test module, an environmental factor module, a data acquisition module and a control module which are disposed in a closed space. The stress test module comprises a concrete pole frame, a metal hoop, a metal connecting rod, an eccentric motor, an insulator and a spring. The environmental factor module comprises a power unit, a salt spray unit, an ultraviolet irradiation unit, a rain spray unit and a thermocycling unit. The data acquisition module is used to acquire corresponding test information under the control of the control module. The insulating composite cross arm aging test system performs evaluation from multiple angles in consideration of multiple factors, such that electrical properties, mechanical properties, aging resistance and service life of an insulating composite cross arm can be accurately evaluated, thereby providing supporting test data for engineering applications of the insulating composite cross arm.

Description

A composite insulation cross arm aging test system

technical field

The invention relates to the field of composite cross arms, in particular to a composite insulation cross arm aging test system.

Background technique

At present, lightning strikes are still the main reason for the tripping of distribution network faults, and in practical applications, the complex environment will have a serious impact on the performance of distribution network components. In order to improve the insulation level of the distribution network, the composite insulating cross arm for the distribution network has appeared. The composite insulating cross arm for the distribution network can greatly improve the insulation level of the distribution network, thereby reducing the lightning strike and tripping faults of the distribution network. Generally speaking, the use of outdoor composite power equipment must undergo a comprehensive aging resistance and service life evaluation to ensure the safety of operation. The structure and internal and external insulation design of the distribution network composite insulating cross arm are quite different from the main network composite insulating cross arm, composite insulator, composite pillar insulator, and composite pole, and the mechanical stress in actual operation is quite different, and the traditional insulator is aging. The test system cannot be applied to the distribution network composite insulation cross-arm, and the electrical properties, mechanical properties, anti-aging performance and life of the composite insulation cross-arm will vary greatly due to changes in environmental factors, so the composite insulation cross-arm in the power The safe and stable operation of the system has caused certain hidden dangers.

SUMMARY OF THE INVENTION

In view of the above problems, the purpose of the present invention is to provide a composite insulating cross arm aging test system that can evaluate the aging performance of the composite insulating cross arm from multiple angles and multiple factors.

In order to achieve the above object, an embodiment of the present invention provides a composite insulation cross arm aging test system, which includes: a stress test module, an environmental factor module, a data acquisition module and a control module arranged in a closed space.

The stress test module includes a cement rod frame, a metal hoop, a metal connecting rod, an eccentric motor, an insulator and a spring, and is used to test the strain stress of the tested composite insulation crossarm under the control of the control module .

The cement pole frame is vertically arranged in the closed space; the top of the cement pole frame is provided with the metal hoop, and the tested composite insulating cross-arm is connected to the cement rod frame through the metal hoop; The metal connecting rod is a concave structure, and the two ends of the tested composite insulating cross-arm are correspondingly connected with the two opposite tops of the metal connecting rod concave structure; the two bending places of the metal connecting rod concave structure are The spring and the insulator are connected in sequence; the metal connecting rod is also connected with the eccentric motor through the insulator.

The environmental factor module includes a power unit, a salt spray unit, an ultraviolet light unit, a rain shower unit, and a cold-heat cycle unit, and is used to provide a corresponding environment for the tested composite insulation cross-arm under the control of the control module. condition.

The power unit includes a test transformer, the test transformer is connected with the metal connecting rod through a wire, and is used for providing a voltage of 10kV-35kV; the salt spray unit is used for providing a salt spray environment; the ultraviolet light unit is used for UV light is provided; the rain shower unit is used to provide a rain shower environment; the cold and heat cycle unit is used to provide a corresponding circulating temperature.

The data acquisition module is used to collect corresponding test information under the control of the control module, and the test information includes at least one of the following parameters: strain stress, leakage current, corona discharge information, partial discharge information and temperature information.

As an improvement of the above scheme, the height of the cement pole frame is 0.8m and the diameter is 30cm.

As an improvement of the above scheme, the rated voltage of the test transformer is AC 50kV～400kV, DC 70kV～420kV, and the rated capacitance is 1kVA～400kVA.

As an improvement of the above solution, the cooling and heating cycle unit, which includes a cooling fan, a compressor, a radiator and a steam engine, is used to provide a cycle temperature with a temperature range of -20°C to 60°C;

The air cooler is connected to the compressor outside the closed space through a hollow pipe, and the radiator is connected to the steam engine outside the closed space through a hollow pipe.

As an improvement of the above solution, the model of the air cooler is DJ55, and the compressor unit is 8HP.

As an improvement of the above solution, the acquisition module includes an infrared imager, an ultraviolet imager, an optical fiber measuring device, a strain gauge, a temperature sensor and a high-frequency current sensor.

As an improvement of the above solution, the cameras of the infrared imager and the ultraviolet imager are both aimed at the composite insulation cross-arm under test.

As an improvement of the above solution, the optical fiber measuring device is a distributed optical fiber measuring device based on the Brillouin principle.

As an improvement of the above solution, a pressure sensor is also included, the pressure sensor is arranged on the metal connecting rod, and is used to measure the load information of the tested composite insulating cross arm.

As an improvement of the above solution, a displacement meter is also included, the displacement meter is designed on the metal connecting rod and is used to measure the displacement information of the tested composite insulating cross-arm.

The composite insulation cross arm aging test system provided by the present invention is constructed by using different functional modules in a closed space, supplemented by specific devices such as cement pole frames, metal hoops, metal connecting rods, eccentric motors, insulators and springs The composite insulating cross-arm simulates the environment, and at the same time combines the units that can provide various environmental factors, so that the complex environment such as rain, salt spray, ultraviolet light and temperature changes in the practical application of the composite insulating cross-arm can be effectively simulated. According to The parameters such as strain, leakage current, partial discharge and temperature of the composite insulating cross-arm measured in real time during the test can accurately evaluate the electrical properties, mechanical properties and anti-aging properties of the composite insulating cross-arm from multiple angles and factors. and service life, providing test data support for the engineering application of composite insulation crossarms.

Description of drawings

In order to illustrate the technical solutions of the present invention more clearly, the following will briefly introduce the accompanying drawings used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention, which are common in the art. As far as technical personnel are concerned, other drawings can also be obtained based on these drawings without any creative effort.

1 is a schematic structural diagram of a composite insulation cross arm aging test system provided by an embodiment of the present invention;

2 is a schematic diagram of the loading situation of each aging factor in one cycle of a composite insulation cross arm aging test system provided by an embodiment of the present invention;

FIG. 3 is a schematic diagram of a summary of parameters of each data acquisition device of a composite insulation cross arm aging test system provided by an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In describing embodiments of the present invention, it is noted that practice may be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. Furthermore, the present invention may be used in computing device environments or configurations including numerous general purpose or special purpose. For example: personal computers, server computers, handheld or portable devices, tablet-type devices, multi-processor devices, distributed computing environments including any of the above, and the like.

In the description of the embodiments of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, only It is for the convenience of describing the embodiments of the present invention, rather than indicating or implying that the referred devices or components must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation on the embodiments of the present invention.

An embodiment of the present invention provides a composite insulation cross-arm aging test system. Please refer to FIG. 1 , which is a schematic structural diagram of a composite insulation cross-arm aging test system provided in an embodiment of the present invention, which includes an aging test system disposed in a closed space. Stress test module, environmental factor module, data acquisition module and control module.

Specifically, the stress test module includes a cement rod frame, a metal hoop, a metal connecting rod, an eccentric motor, an insulator and a spring, and is used to measure the strain of the tested composite insulating crossarm under the control of the control module. stress test.

The composite insulation cross arm aging test system provided by the embodiment of the present invention uses different functional modules in a closed space, supplemented by specific components such as cement pole racks, metal hoops, metal connecting rods, eccentric motors, insulators and springs To build a simulation environment of composite insulation cross-arm, and combined with units that can provide various environmental factors, it can effectively simulate the complex environment of composite insulation cross-arm in practical applications such as rain, salt spray, ultraviolet light and temperature changes. , According to the real-time measurement of the strain, leakage current, partial discharge, temperature and other parameters of the composite insulation cross-arm during the test, the electrical properties, mechanical properties and resistance of the composite insulation cross-arm can be accurately evaluated from multiple angles and factors. Aging performance and life, provide test data support for the engineering application of composite insulation crossarms.

It should be noted that, in this embodiment, the cement pole frame is vertically fixed in the closed space, the size of the closed space is preferably 2.5m*2.0m*2.5m, and the cement pole frame is partially buried underground with a burial depth of 0.4 m. The bottom of the pole is reinforced with cement. The tested composite insulating cross-arm is preferably a 1.2m-long real solid distribution network composite insulating cross-arm. The tested composite insulating cross-arm is fixed on the cement pole frame through a metal hoop. The two ends of the composite insulating cross-arm are connected by metal connecting rods. The length of the metal connecting rod is preferably the same as that of the tested composite insulating cross-arm, and the length of the insulator is at least 0.5m. The metal connecting rod is preferably a concave structure as shown in the figure. The advantage of the structure is that the structure is stable, which can effectively fix the composite insulating cross-arm under test. The metal connecting rod is fixed by springs and insulators. Usually, the closed space is set on the ground, that is, the metal connecting rod is fixed on the ground through springs and insulators. , The eccentric motor is connected with the metal connecting rod through a rigid connection and an insulator. The rigid connection makes the structural connection more stable on the premise of ensuring the electrical performance.

In this embodiment, the salt spray unit is installed on the wall of the enclosed space to provide salt spray for the tested composite insulating cross-arm; the ultraviolet light unit is installed on the upper wall of the enclosed space to provide ultraviolet light for the tested composite insulating cross-arm; The rain unit is installed on the upper wall of the closed space to provide a raining environment for the tested composite insulation crossarm. The power unit in the environmental factor module includes a test transformer, which can provide 10kV to 35kV to simulate a lightning strike environment. The control module in the embodiment of the present invention can control the switches of the rain shower unit, the salt spray unit, and the ultraviolet light unit according to the loading time of the aging factor. Specifically, in this embodiment, the control range of the test conditions is: (1) Humidity range: 30 %RH-98%RH; (2) Temperature control range: -30-50°C, ±0.5°C; (3) Rain intensity range: 120mm/h; (4) Flow rate: 0.5 kg/m³ h, NaCl Volume: 10kg/m3; (5) UV lamp irradiance: 100W/m2; (6) Voltage requirement: 10kV; (7) Mechanical force vibration frequency 0.6Hz.

24h of the composite insulation cross arm aging test system provided by the embodiment of the present invention is a test cycle, please refer to FIG. 2, which is the loading condition of each aging factor in one cycle of the composite insulation cross arm aging test system provided by the embodiment of the present invention Schematic.

Preferably, in the above embodiment, the height of the cement pole frame is 0.8m and the diameter is 30cm.

Preferably, in the above embodiment, the rated voltage of the test transformer is AC 50kV～400kV, DC 70kV～420kV, and the rated capacitance is 1kVA～400kVA.

Preferably, in the above embodiment, the cooling and heating cycle unit includes a cooling fan, a compressor, a radiator and a steam engine, and is used to provide a cycle temperature in the temperature range of -20°C to 60°C. The air cooler is connected to the compressor outside the closed space through a hollow pipe, and the radiator is connected to the steam engine outside the closed space through a hollow pipe.

Preferably, in the above embodiment, the model of the air cooler is DJ55, and the compressor unit is 8HP.

Preferably, in the above embodiment, the acquisition module includes an infrared imager, an ultraviolet imager, an optical fiber measuring device, a strain gauge, a temperature sensor and a high-frequency current sensor. Specifically, please refer to FIG. 3 , which is a summary of parameters of each data acquisition device of a composite insulation cross arm aging test system provided by an embodiment of the present invention.

Preferably, in the above embodiment, the cameras of the infrared imager and the ultraviolet imager are both aimed at the tested composite insulating cross-arm, so as to better test the tested composite insulating cross-arm.

Preferably, in the above embodiment, the optical fiber measuring device is a distributed optical fiber measuring device based on the Brillouin principle.

Preferably, in the above embodiment, a pressure sensor is further included, the pressure sensor is arranged on the metal connecting rod, and is used to measure the load information of the tested composite insulating cross arm.

Preferably, in the above-mentioned embodiment, a displacement gauge is further included, and the displacement gauge is arranged on the metal connecting rod and is used to measure the displacement information of the tested composite insulating cross-arm.

An aging test system for a composite insulation cross arm provided by an embodiment of the present invention uses different functional modules in a closed space, supplemented by concrete rod frames, metal hoops, metal connecting rods, eccentric motors, insulators and springs. The device is used to build the simulation environment of the composite insulation cross-arm, and at the same time, it is combined with units that can provide various environmental factors, so that the composite insulation cross-arm can be effectively simulated in practical applications, such as rain, salt spray, ultraviolet light and temperature changes. In complex environments, according to the real-time measurement of the strain, leakage current, partial discharge, temperature and other parameters of the composite insulation cross-arm during the test, the electrical and mechanical properties of the composite insulation cross-arm can be accurately evaluated from multiple angles and factors. , anti-aging performance and life, provide test data support for the engineering application of composite insulation cross arm.

The above disclosures are only some preferred embodiments of the present invention, and of course, the scope of the rights of the present invention cannot be limited by this. Those of ordinary skill in the art can understand all or part of the process for realizing the above embodiments, and follow the claims of the present invention. The equivalent changes made still belong to the scope covered by the invention.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented by instructing relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium. During execution, the processes of the embodiments of the above-mentioned methods may be included. Wherein, the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM) or a random access memory (Random Access Memory, RAM) or the like.

Claims

A composite insulation cross arm aging test system, characterized in that it comprises: a stress test module, an environmental factor module, a data acquisition module and a control module arranged in a closed space;

The stress test module includes a cement rod frame, a metal hoop, a metal connecting rod, an eccentric motor, an insulator and a spring, and is used to test the strain stress of the tested composite insulation crossarm under the control of the control module ;

The cement pole frame is vertically arranged in the closed space; the top of the cement pole frame is provided with the metal hoop, and the tested composite insulating cross-arm is connected to the cement rod frame through the metal hoop; The metal connecting rod is a concave structure, and the two ends of the tested composite insulating cross-arm are correspondingly connected with the two opposite tops of the metal connecting rod concave structure; the two bending places of the metal connecting rod concave structure are connecting the spring and the insulator in sequence; the metal connecting rod is also connected to the eccentric motor through the insulator;

The environmental factor module includes a power unit, a salt spray unit, an ultraviolet light unit, a rain shower unit, and a cold-heat cycle unit, and is used to provide a corresponding environment for the tested composite insulation cross-arm under the control of the control module. condition;

The power unit includes a test transformer, the test transformer is connected with the metal connecting rod through a wire, and is used for providing a voltage of 10kV-35kV; the salt spray unit is used for providing a salt spray environment; the ultraviolet light unit is used for UV light is provided; the rain shower unit is used to provide a rain shower environment; the cold and heat cycle unit is used to provide a corresponding circulating temperature;

The data acquisition module is used to collect corresponding test information under the control of the control module, and the test information includes at least one of the following parameters: strain stress, leakage current, corona discharge information, partial discharge information and temperature information.
The composite insulation cross arm aging test system according to claim 1, wherein the height of the cement pole frame is 0.8m and the diameter is 30cm.
The composite insulation cross arm aging test system according to claim 1, wherein the rated voltage of the test transformer is AC 50kV～400kV, DC 70kV～420kV, and the rated capacitance is 1kVA～400kVA.
The composite insulation cross arm aging test system according to claim 1, wherein the cooling and heating cycle unit includes a cooling fan, a compressor, a radiator and a steam engine, and is used to provide a temperature range of -20°C to 60°C. ℃ cycle temperature;

The air cooler is connected to the compressor outside the closed space through a hollow pipe, and the radiator is connected to the steam engine outside the closed space through a hollow pipe.
The composite insulation cross arm aging test system according to claim 4, wherein the model of the air cooler is DJ55, and the compressor unit is 8HP.
The composite insulation cross arm aging test system according to claim 1, is characterized in that, described acquisition module comprises infrared imager, ultraviolet imager, optical fiber measuring device, strain gauge, temperature sensor and high-frequency current sensor.
The composite insulating cross-arm aging test system according to claim 6, wherein the cameras of the infrared imager and the ultraviolet imager are both aimed at the tested composite insulating cross-arm.
The composite insulation cross arm aging test system according to claim 6, wherein the optical fiber measuring device is a distributed optical fiber measuring device based on the Brillouin principle.
The composite insulation cross arm aging test system according to claim 6, further comprising a pressure sensor, the pressure sensor is arranged on the metal connecting rod, and is used to measure the load information of the tested composite insulation cross arm.
The composite insulation cross-arm aging test system according to claim 6, further comprising a displacement gauge, the displacement gauge is designed on the metal connecting rod, and is used to measure the displacement information of the tested composite insulation cross-arm.