A power distribution equipment multi-deterioration scene simulation experimental device based on modular design

Abstract

The application relates to the technical field of power distribution equipment deterioration experiment, and discloses a power distribution equipment multi-deterioration scene simulation experiment device based on modular design, wherein the test cabinet comprises an upper cabinet body provided with an experiment cabin and a lower cabinet body provided with a voltage transformation mechanism; a plurality of assembly mechanisms are arranged in the experiment cabin, the assembly mechanisms comprise three-phase contacts and switch contacts corresponding to each other, and the three-phase contacts and the switch contacts are connected with the voltage transformation mechanism; the test mold comprises a pair of sub-molds used for being detachably connected with the three-phase contacts and the switch contacts; an environment simulation mechanism is arranged in the experiment cabin; a data acquisition mechanism is arranged in the experiment cabin; a digital display control mechanism is connected with the data acquisition mechanism; a three-phase load mechanism is connected with the three-phase contacts; and a three-phase alternating current power supply is connected with the voltage transformation mechanism; the application realizes simulation of a plurality of deterioration scenes of a plurality of power distribution equipment, and effectively improves the utilization rate of the accelerated deterioration experiment device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power distribution equipment degradation experiment, in particular to a power distribution equipment multi-degradation scene simulation experiment device based on modular design. BACKGROUND

[0002] As an important hub of power distribution system, the safe and stable operation of power distribution equipment is crucial to the power grid, but with the increase of operation life, the performance of power distribution equipment will inevitably deteriorate, and eventually lead to the end of the equipment operation life.

[0003] The method of accelerated degradation experiment of power distribution equipment can accurately simulate the degradation behavior of power distribution equipment in a short time, thereby providing valuable data for power distribution equipment degradation research.

[0004] The existing accelerated degradation experiment device is usually for a specific degradation scene of a certain power equipment or component, and cannot effectively simulate the degradation behavior of different power equipment under different degradation scenes and operating conditions, and the function is not comprehensive enough. If you want to achieve the purpose of simulating the degradation behavior of different power equipment under different degradation scenes and operating conditions, you must design and manufacture multiple accelerated degradation experiment platforms, which will cause waste of design and manufacturing cost. SUMMARY

[0005] The purpose of the present application is to provide a power distribution equipment multi-degradation scene simulation experiment device based on modular design, which aims to solve or improve at least one of the above technical problems.

[0006] To achieve the above purpose, the present application provides the following scheme: the present application provides a power distribution equipment multi-degradation scene simulation experiment device based on modular design, comprising:

[0007] The test cabinet comprises an upper cabinet body provided with an experiment cabin and a lower cabinet body provided with a voltage conversion mechanism;

[0008] A plurality of assembly mechanisms are arranged in the experiment cabin, the assembly mechanism comprises a three-phase contact and a switch contact corresponding to each other, and the three-phase contact and the switch contact are connected with the voltage conversion mechanism;

[0009] The test mold comprises a pair of sub-molds for detachably connecting with the three-phase contact and the switch contact;

[0010] The environment simulation mechanism is arranged in the experiment cabin;

[0011] The data acquisition mechanism is arranged in the experiment cabin;

[0012] The digital display control mechanism is connected with the data acquisition mechanism;

[0013] A three-phase load mechanism connected with the three-phase contactor;

[0014] A three-phase alternating current power supply connected with the voltage conversion mechanism.

[0015] Optionally, the voltage conversion mechanism comprises a step-up transformer and a step-down transformer.

[0016] Optionally, the environment simulation mechanism comprises an electric heating sheet, an electric heating wire, a salt spray high-pressure nozzle, a shower nozzle, a humidifier and an ultraviolet lamp.

[0017] Optionally, the top of the upper cabinet body is provided with an adjustable exhaust hole in communication with the experiment cabin.

[0018] Optionally, the data acquisition mechanism comprises a voltage sensor, a current sensor, a temperature sensor, an infrared thermal imaging sensor, a humidity sensor, a transient ground wave local discharge sensor, an ultrasonic local discharge sensor and a gas concentration sensor.

[0019] Optionally, the digital display control mechanism comprises a control console and a terminal display arranged on the control console.

[0020] Optionally, the control console is provided with a voltage regulator connected with the three-phase alternating current power supply and the voltage conversion mechanism.

[0021] Optionally, the three-phase load mechanism comprises a load vehicle integrated with resistance, inductance and capacitance.

[0022] Optionally, the experiment cabin is detachably connected with a storage partition frame, and the storage partition frame is located between the three-phase contactor and the switch contactor.

[0023] Optionally, the sub-mold is detachably connected with the switch contactor and the three-phase contactor through bolts and nuts.

[0024] The present application discloses the following technical effects: by setting a pair of sub-molds detachably connected between the three-phase contactor and the switch contactor, only different sub-molds need to be replaced, which can effectively simulate the degradation and failure behavior of various power distribution equipment, by setting an environment simulation mechanism to simulate various operating environments, in combination with the simulation of various power distribution equipment operating conditions, the degradation and failure forms of the same type of power distribution equipment or various power distribution equipment in different scenarios can be effectively simulated, the simulation of various degradation scenarios of various power distribution equipment is realized, the situation of manufacturing multiple accelerated degradation devices to simulate various degradation scenarios of different power distribution equipment is effectively avoided, the manufacturing cost of the experimental device is saved, and the utilization rate of the accelerated degradation experimental device is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this application. The embodiments of the application illustrated in the drawings are intended to explain the aspects of the present application and are not limiting of the present application. In the drawings:

[0026] Figure 1 is a structural schematic diagram of the present application;

[0027] Figure 2 is a structural schematic diagram of the test cabinet of the present application;

[0028] Figure 3 is a structural schematic diagram of the test cabinet of the present application from another perspective;

[0029] Figure 4 is a schematic diagram of the circuit wiring of the present application;

[0030] Figure 5 is a schematic diagram of the sub-mold for simulating the accelerated degradation of the oil paper insulation of the oil-immersed transformer of the present application

[0031] Figure 6 is a schematic diagram of the sub-mold for simulating the normal operating state of the contact of the switch cabinet of the present application;

[0032] Figure 7 is a schematic diagram of the sub-mold for simulating the degradation caused by the suspended discharge inside the switch cabinet of the present application;

[0033] Figure 8 is a schematic diagram of the sub-mold for simulating the degradation caused by the poor contact of the cable joint of the present application;

[0034] Figure 9 is a schematic diagram of the sub-mold for simulating the degradation of the insulation sleeve caused by the surface discharge of the present application;

[0035] Figure 10 is a schematic diagram of the sub-mold for simulating the degradation behavior test of any material of the present application.

[0036] In the drawings: 1, test cabinet; 11, upper cabinet body; 12, lower cabinet body; 2, assembly mechanism; 21, three-phase contact; 22, switch contact; 3, environment simulation mechanism; 31, electric heating sheet; 32, electric heating wire; 33, salt spray high-pressure nozzle; 34, lotus-shaped water-splashing nozzle; 35, humidifier; 36, ultraviolet lamp; 4, data acquisition mechanism; 5, digital display control mechanism; 51, control console; 52, terminal display; 53, voltage regulator; 6, three-phase load mechanism; 7, three-phase alternating current power supply; 8, adjustable exhaust hole; 9, storage partition rack. DETAILED DESCRIPTION

[0037] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of the present application.

[0038] In order to make the above objectives, characteristics and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] With reference to Figures 1-10 The present application provides a power distribution equipment multi-deterioration scene simulation experiment device based on modular design, comprising:

[0040] The test cabinet 1 comprises an upper cabinet body 11 provided with an experiment cabin and a lower cabinet body 12 provided with a voltage conversion mechanism;

[0041] A plurality of assembly mechanisms 2 are arranged in the experiment cabin, and the assembly mechanism comprises a three-phase contact 21 and a switch contact 22 corresponding in up and down, and the three-phase contact 21 and the switch contact 22 are connected with the voltage conversion mechanism;

[0042] The test mold comprises a pair of sub-molds for detachably connecting with the three-phase contact 21 and the switch contact 22;

[0043] The environment simulation mechanism 3 is arranged in the experiment cabin;

[0044] The data acquisition mechanism 4 is arranged in the experiment cabin;

[0045] The digital display control mechanism 5 is connected with the data acquisition mechanism 4;

[0046] The three-phase load mechanism 6 is connected with the three-phase contact 21;

[0047] The three-phase alternating current power supply 7 is connected with the voltage conversion mechanism.

[0048] By detachably connecting a pair of sub-molds between the three-phase contact 21 and the switch contact 22, only different sub-molds need to be replaced, and the deterioration and failure behavior of a plurality of power distribution equipment can be effectively simulated. By setting the environment simulation mechanism 3 to simulate a plurality of operating environments, in combination with the simulation of a plurality of power distribution equipment operating conditions, the deterioration and failure forms of the same kind of power distribution equipment or a plurality of power distribution equipment in different scenes can be effectively simulated, the simulation of a plurality of deterioration scenes of a plurality of power distribution equipment is realized, and the situation of manufacturing a plurality of accelerated deterioration devices for simulating a plurality of deterioration scenes of different power distribution equipment is avoided, thereby saving the manufacturing cost of the experiment device and effectively improving the utilization rate of the accelerated deterioration experiment device.

[0049] In an embodiment of the present application, the voltage conversion mechanism comprises a step-up transformer and a step-down transformer.

[0050] The step-up transformer is a 0.4kV / 10kV step-up transformer, mainly responsible for boosting the 380V three-phase voltage to 10kV three-phase voltage.

[0051] The step-down transformer is a 10kV / 0.4kV step-down transformer, mainly responsible for reducing the 10kV three-phase voltage to 380V three-phase voltage.

[0052] In an embodiment of the present application, the environmental simulation mechanism 3 comprises an electric heating sheet 31, an electric heating wire 32, a salt mist high-pressure nozzle 33, a shower nozzle 34, a humidifier 35, and an ultraviolet lamp 36.

[0053] The electric heating sheet 31 is connected with an environmental temperature control circuit, and the main function is to adjust the operating environment temperature inside the experimental device, simulating the temperature of different hot spots of the power distribution equipment.

[0054] The electric heating wire 32 is connected with a hot spot temperature control circuit, and the hot wire is used in cooperation with the sub-mold when needed to adjust the hot spot temperature inside the sub-mold, simulating the hot spot temperature at different positions of the power distribution equipment.

[0055] The salt mist high-pressure nozzle 33 is connected with a salt mist generator, and the salt mist high-pressure nozzle 33 is installed on the left side of the experimental cabin, adjusting the salt mist concentration inside the experimental device, simulating the salt mist environment of different concentrations of the power distribution equipment.

[0056] The shower nozzle 34 is connected with a water supply system, and the shower nozzle 34 is installed on the top of the experimental cabin, spraying water inside the experimental cabin, simulating different intensities of rainfall in the actual operation of the power distribution equipment.

[0057] The humidifier 35 is connected with a humidity controller, and the humidifier 35 is installed at the bottom of the experimental cabin, adjusting the environmental humidity inside the experimental device, simulating different operating environmental humidity of the power distribution equipment.

[0058] The ultraviolet lamp 36 is connected with an illumination circuit, and the ultraviolet lamp 36 is installed on the top of the experimental cabin, simulating the degradation behavior of the power distribution equipment under different intensities of ultraviolet light.

[0059] In an embodiment of the present application, the top of the upper cabinet body 11 is provided with an adjustable exhaust hole 8 communicating with the experimental cabin.

[0060] The adjustable exhaust hole 8 is mainly used to adjust the pressure difference between the inside and outside of the experimental cabin, avoiding safety accidents such as explosion of the experimental cabin caused by excessive gas pressure.

[0061] In an embodiment of the present application, the data acquisition mechanism 4 comprises a voltage sensor, a current sensor, a temperature sensor, an infrared thermal imaging sensor, a humidity sensor, a transient ground wave partial discharge sensor, an ultrasonic partial discharge sensor, and a gas concentration sensor. The sensors are installed on the right side of the inside of the experimental cabin, for real-time online monitoring of the voltage, current, temperature, humidity, partial discharge intensity, and gas concentration of the three-phase contact 21, the switch contact 22, and the sub-mold, and the data is collected through the RS485 bus to the terminal display 52 for analysis and display.

[0062] In an embodiment of the present application, the digital display control mechanism 5 comprises a control console 51 and a terminal display 52 arranged on the control console 51.

[0063] In an embodiment of the present application, the control console 51 is provided with a voltage regulator 53 connected to the three-phase alternating current power supply 7 and the voltage conversion mechanism.

[0064] The voltage regulator 53 is mainly used to convert the input 380V three-phase voltage into a three-phase voltage output of 0-430V, and serve as the input of the 0.4kV / 10kV step-up transformer.

[0065] In an embodiment of the present application, the three-phase load mechanism 6 comprises a load vehicle integrated with resistance, inductance, and capacitance. Different sizes of resistance, inductance, and capacitance values can be set to simulate the electrical load characteristics under different electrical areas.

[0066] In an embodiment of the present application, a detachable storage partition frame 9 is connected to the inside of the experimental cabin, and the storage partition frame 9 is located between the three-phase contact 21 and the switch contact 22.

[0067] The storage partition frame 9 is a lattice-shaped hollow storage rack made of 304 stainless steel, fixed by horizontal grooves on two sides of the accelerated degradation experimental cabin, and used for placing some accelerated degradation samples that need to be supported.

[0068] In an embodiment of the present application, the sub-mold is detachably connected to the switch contact 22 and the three-phase contact 21 through bolts and nuts.

[0069] The sub-mold comprises a screw segment and a mold segment.

[0070] The switch contact 22 is a vertical upward bolt structure, and the end of the switch contact 22 is connected to the end of the sub-mold through a plurality of stacked and welded nuts as fixing members, and the mechanical structure is fixed and the circuit is turned on through the nuts and the screws.

[0071] The three-phase contact 21 is a structure of a round hole at the end of a horizontal iron plate, and two nuts are used to fix the sub-mold on the contact body at the upper and lower positions of the iron plate hole, and the relative position of the screw part of the sub-mold and the iron plate hole can be adjusted up and down according to the experimental scene.

[0072] The plurality of three-phase contacts 21 and the plurality of switch contacts 22 are three, which are A phase, B phase and C phase, and different sub-molds can be installed on the three-phase contacts 21 and the switch contacts 22 in any two or three phases of the A phase, the B phase and the C phase at the same time, so as to simulate the phenomenon that a plurality of components of a power distribution device have a plurality of deterioration behaviors at the same time.

[0073] Further, the circuit wiring of the present application is as shown in Figure 4

[0074] The accelerated deterioration experiment platform in the present application is powered by a 380V three-phase alternating current power supply 7, and the wiring provides power supply for the voltage regulator 53 through the three-phase linkage air switch;

[0075] The voltage regulator 53 converts the input 380V three-phase voltage into a 0-30V three-phase voltage output, and at the same time, a 0-430V three-phase voltage is input into a 0.4kV / 10kV step-up transformer;

[0076] The 0.4kV / 10kV step-up transformer raises the 0-30V three-phase voltage to 0-0.75kV, and passes through the three switch contacts 22 (A, B, C) of the inlet line on the lower side of the experiment cabin;

[0077] Through the sub-mold (a, b, c) connected with the switch contact 22 (A, B, C), and the sub-mold (a, b, c) connected with the switch contact 22 (A, B, C) and the sub-mold (a', b', c') connected with the three-phase contact 21 (A', B', C') in the experiment cabin, there is an air gap and an insulating material between them;

[0078] And then through the sub-mold (a', b', c') connected with the three-phase contact 21 (A', B', C') and the three three-phase contacts 21 (A', B', C');

[0079] The wiring passes through a three-phase 10kV / 0.4kV step-down transformer, and finally passes through a load switch to connect the three-phase load mechanism 6.

[0080] Further, the structure of the sub-mold for simulating the accelerated deterioration of the oil-paper insulation of the oil-immersed transformer is as shown in Figure 5

[0081] Further, the structure of the sub-mold for simulating the normal operating state of the contact of the switch cabinet is as shown in Figure 6

[0082] ​​​Further, the structure of the sub-mold simulating the deterioration caused by the floating discharge inside the switch cabinet is shown in Figure 7 .

[0083] Further, the structure of the sub-mold simulating the deterioration caused by poor contact of the cable joint is shown in Figure 8

[0084] Further, the structure of the sub-mold simulating the deterioration caused by the surface discharge of the insulating sleeve is shown in Figure 9

[0085] Further, the structure of the sub-mold simulating the deterioration behavior test of any material is shown in Figure 10

[0086] Experimental steps:

[0087] According to the need to simulate the deterioration scene of the power distribution equipment, select the appropriate type of sub-mold (a, b, c) and (a', b', c'), and respectively install and fix them at the end of the switch contact 22 (A, B, C) and the three-phase contact 21 (A', B', C'), and adjust the distance between the sub-molds (a, b, c) and (a', b', c') according to the actual deterioration scene;

[0088] According to the need to simulate different power distribution equipment deterioration scenes, adjust the environmental temperature, hot spot temperature, salt spray concentration, spray intensity, environmental humidity, ultraviolet light intensity, and decide whether to install the object partition shelf 9 according to the scene needs. And by adjusting the resistance, inductance, and capacitance of the three-phase load mechanism 6, simulate the influence of different types of power distribution area loads on the deterioration behavior of power distribution equipment;

[0089] The multi-deterioration scene simulation experiment device is powered by a 380V three-phase alternating current power supply 7, and by operating the voltage regulator 53 to the appropriate voltage, the actual deterioration forms of power distribution equipment such as partial discharge and overheating are simulated between the sub-molds (a, b, c) and (a', b', c'), and several times the actual deterioration stress is used to simulate the accelerated deterioration of the power distribution equipment, so as to realize the simulation of the whole process of the power distribution equipment deterioration in a period much shorter than the actual deterioration process;

[0090] During the accelerated deterioration experiment, continuously observe and record the voltage, current, temperature, humidity, partial discharge intensity, and gas concentration Internet of Things sensing data displayed on the terminal display 52, and later use these online monitoring Internet of Things sensing data to study the whole life deterioration process of the power distribution equipment.

[0091] ​​​In the description of the present application, it needs to be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0092] The above-described embodiments are only to describe the preferred modes of the present application, and not to limit the scope of the present application. Without departing from the design spirit of the present application, various modifications and improvements to the technical solutions of the present application made by those skilled in the art shall fall within the protection scope determined by the claims of the present application.

Claims

1. A multi-deterioration scenario simulation experimental device for power distribution equipment based on modular design, characterized in that, include: The test cabinet (1) includes an upper cabinet (11) with an experimental chamber and a lower cabinet (12) with a voltage conversion mechanism. Multiple assembly mechanisms (2) are installed inside the experimental chamber. Each assembly mechanism includes three-phase contacts (21) and switch contacts (22) corresponding to each other. The three-phase contacts (21) and the switch contacts (22) are connected to the voltage conversion mechanism. The test mold includes a pair of sub-molds for detachably connecting to the three-phase contact (21) and the switch contact (22) for grounding; An environmental simulation mechanism (3) is installed inside the experimental chamber; The data acquisition mechanism (4) is located inside the experimental chamber; The digital display control mechanism (5) is connected to the data acquisition mechanism (4); The three-phase load mechanism (6) is connected to the three-phase contacts (21); A three-phase AC power supply (7) is connected to the voltage conversion mechanism; The environmental simulation mechanism (3) includes an electric heating element (31), an electric heating wire (32), a salt spray high-pressure nozzle (33), a lotus-shaped water spray nozzle (34), a humidifier (35), and an ultraviolet lamp (36); The data acquisition mechanism (4) includes a voltage sensor, a current sensor, a temperature sensor, an infrared thermal imaging sensor, a humidity sensor, a transient ground wave partial discharge sensor, an ultrasonic partial discharge sensor, and a gas concentration sensor. The digital display control mechanism (5) includes a console (51) and a terminal display (52) disposed on the console (51); The control console (51) is equipped with a voltage regulator (53) connected to the three-phase AC power supply (7) and the voltage conversion mechanism; The sub-mold is detachably connected to the switch contact (22) and the three-phase contact (21) via bolts and nuts; The sub-mold includes a screw section and a mold section. The switch contact (22) is a vertically upward bolt structure. Multiple stacked and welded nuts are used as fasteners to connect the end of the switch contact (22) to the end of the sub-mold respectively. By tightening the nuts and screws, the mechanical structure is fixed and the circuit is connected. The three-phase contact (21) is a structure with a circular screw hole at the end of a horizontal iron plate. Two nuts are used to fix the sub-mold to the contact body at the upper and lower positions of the screw hole on the iron plate. The relative position of the screw part of the sub-mold to the screw hole on the iron plate can be adjusted up and down according to the experimental scenario.

2. The multi-deterioration scenario simulation experimental device for power distribution equipment based on modular design according to claim 1, characterized in that, The voltage conversion mechanism includes a step-up transformer and a step-down transformer.

3. The multi-deterioration scenario simulation experimental device for power distribution equipment based on modular design according to claim 1, characterized in that, The top of the upper cabinet (11) is provided with an adjustable exhaust port (8) that is connected to the experimental chamber.

4. The multi-deterioration scenario simulation experimental device for power distribution equipment based on modular design according to claim 1, characterized in that, The three-phase load mechanism (6) includes a load vehicle that integrates resistors, inductors and capacitors.

5. The multi-deterioration scenario simulation experimental device for power distribution equipment based on modular design according to claim 1, characterized in that, The experimental chamber is detachably connected to a storage partition (9), which is located between the three-phase contact (21) and the switch contact (22).

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