CN109799444B - Insulating medium fault simulation device for heat-electricity combination - Google Patents
Insulating medium fault simulation device for heat-electricity combination Download PDFInfo
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Abstract
The device comprises a sealed container, a self-heating electrode module, a high-voltage electrode, a high-voltage wall bushing, a low-voltage wall bushing, a sample inlet, a sampling port, a discharge detection device, a temperature controller, a heating power supply, a plate bushing flange, an electric heating rod, a pressure detector, a micro-water detector, a discharge signal sensor, a first temperature sensor and a second temperature sensor. During operation, the simulation of 3 types of thermal-electrical composite faults can be realized through the temperature controller, and the simulation comprises the simulation of the thermal-electrical composite faults with different overheating-discharging positions, the simulation of the thermal-electrical composite faults with the same overheating-discharging positions and the simulation of the thermal-electrical composite faults with high-temperature-discharging composite action.
Description
Technical Field
The invention relates to an insulating medium fault simulation device.
Background
Because of its excellent insulating and arc extinguishing properties, SF6 Gas is widely used in electrical equipment such as circuit breakers, transformers, bushings, SF6 Gas Insulated Switchgear (GIS), and the like. At present, in China, ultra-high voltage power grids and extra-high voltage power grids with the voltage class of 220kV and above are all required to be made of SF6 switch equipment, and the number of the SF6 switch equipment is 3.3 ten thousand intervals, which is the first in the world. In addition, equipment such as SF6 Gas Insulated Line (GIL) is also the first choice for power transmission mode in key places such as nuclear power, hydropower and river-crossing power transmission pipe corridors.
The SF6 gas is chemically stable, but will dissociate under discharge or over-temperature conditions; in the absence of other impurities, the dissociated SF6 will rapidly recombine and reduce to SF6 gas. However, in practical use, the SF6 gas inevitably contains impurities such as a small amount of moisture and oxygen, and the dissociated SF6 reacts with these impurities to produce a variety of highly toxic and corrosive decomposition products: SO2F2, SOF2, SO2, H2S, and the like. These decomposition products are present in the equipment and can further accelerate the development of equipment failure and endanger the safety of service personnel. As a hub for transmitting and distributing electric energy in a power grid, a fault of the SF6 switchgear may cause damage to large-scale equipment, large-area power outage, and the like, resulting in huge economic and social losses.
The insulation type fault has the highest proportion and the highest harm in the SF6 electrical equipment fault, and the fault can finally cause the decomposition of SF6 gas. The detection of the decomposed gas can realize early warning of faults and analysis of fault types. However, the mapping relation between the fault condition and the decomposed gas characteristics is lack of unified knowledge, so that the fault criterion of the SF6 decomposed gas is not uniformly determined. In the current research, simulation devices are mostly adopted to simulate equipment faults, but the current simulation devices can only simulate single faults such as local overheating or local discharge, and simulation devices with thermal-electric composite action are not available. Meanwhile, the influence of the electrode temperature is not considered in the simulation of the partial discharge at present, and the influence of the electrode field strength is not considered in the simulation of the local overheating.
In addition, gas-insulated media such as C-C4F8, C4F7N, CF3I also have similar problems in application, and analog devices capable of realizing the thermo-electric composite action are in demand.
At present, a simulation device for the heat-electricity compound action of transformer oil exists in the industry, for example, in the literature, "mulong, lang, yellow and bright, experiment research on the high-quality insulation aging characteristics of transformers under different types of electrothermal stresses," electrical technology, 12 th 2018 ", a pin-plate electrode sealed in a box body is adopted for discharging, and for the simulation of overheating, the whole sealed box body containing the pin-plate electrode is put into a temperature control box for heating and temperature control. The simulation mode has two problems, one is that the temperature resistance of the insulating material adopted by the sealed box body of the discharge simulation device is limited, so that higher overheating temperature cannot be simulated; secondly, the simulated fault is not consistent with the actual operation condition of the equipment, the temperature of the whole discharge simulation device is approximately equal by adopting the temperature control box to simulate overheating, and the temperature distribution of the equipment is uneven in actual operation and has large temperature difference. Furthermore, no hybrid thermal-electrical simulation devices for gas-insulated media are known at present.
Disclosure of Invention
The invention aims to overcome the defects of the conventional simulation device and provides an insulation medium fault simulation device for the heat-electricity combined action. The invention can realize the fault simulation of the insulating medium under the action of the thermal-electrical combination of the insulating medium, so that the fault simulation of the insulating medium is more accurate, and the mapping relation between the decomposition gas characteristics of the insulating medium and the fault state is ensured.
An insulation medium fault simulation device for thermal-electrical multiplexing, characterized in that: the device comprises a sealed container, a self-heating electrode module, a high-voltage electrode, a high-voltage wall bushing, a low-voltage wall bushing, a sample inlet, a sampling port, a discharge detection device, a temperature controller, a heating power supply, a plate bushing flange, an electric heating rod, a pressure detector, a micro-water detector, a discharge signal sensor, a first temperature sensor and a second temperature sensor.
The sealed container is filled with an insulating medium through a sample inlet positioned on the side wall, an external high-voltage power supply is respectively connected with the high-voltage electrode and the self-heating electrode module through a high-voltage wall bushing and a low-voltage wall bushing, the high-voltage wall bushing is positioned on the upper part of the sealed container, the low-voltage wall bushing is positioned on the lower part of the sealed container, the high-voltage wall bushing is connected with the high-voltage electrode inside the sealed container, and the low-voltage wall bushing is connected with the self-heating electrode module inside the sealed container.
The self-heating electrode module can be composed of a needle electrode, an upper plate electrode, a lower plate electrode, a heater and heat-conducting silicone grease; the pin electrode is fixed in the center of the upper plate electrode by adopting threads, a heater is arranged in a cavity formed by the upper plate electrode and the lower plate electrode, the heater is tightly attached to the upper plate electrode, and heat-conducting silicone grease is coated between the heater and the upper plate electrode; the heater shell is made of stainless steel materials, a heating wire is arranged in the heater shell, and is filled with heat-conducting insulating materials, and the heating wire supplies power through a ceramic terminal; the side wall of the upper plate electrode is provided with a first temperature sensor mounting hole; the center of the lower plate electrode is provided with a connecting hole; the high-voltage electrode is in the form of a Bruce electrode.
The self-heating electrode module can also be composed of an air gap insulating block, an upper plate electrode, a lower plate electrode, a heater and heat-conducting silicone grease; the air gap insulating block is of a cylindrical structure, is fixed in the center of the upper plate electrode by adopting threads, and epoxy resin glue is coated between the air gap insulating block and the upper plate electrode; an air gap is reserved between the air gap insulating block and the upper plate electrode; the air gap insulating block and the high-voltage electrode are precisely attached by epoxy resin glue; by adopting the self-heating electrode module, the high-voltage electrode is in a Bruce electrode form.
The self-heating electrode module can also be composed of a dirt insulating block, an upper plate electrode, a lower plate electrode, a heater and heat-conducting silicone grease; the pollution insulation block is of a cylindrical structure, metal fragments adhered by epoxy resin glue are arranged on the side face of the pollution insulation block, the pollution insulation block is fixed in the center of the upper plate electrode by threads, and the epoxy resin glue is coated between the pollution insulation block and the upper plate electrode; the filthy insulating block and the high-voltage electrode are precisely attached by epoxy resin glue; by adopting the self-heating electrode module, the high-voltage electrode is in a Bruce electrode form.
The self-heating electrode module can also be composed of free metal particles, a hemispherical electrode, a lower plate electrode, a heater and heat-conducting silicone grease. The free metal particles are freely placed at the bottom of the hemispherical electrode, a heater is arranged in a cavity formed by the hemispherical electrode and the lower plate electrode, and heat-conducting silicone grease is coated between the heater and the hemispherical electrode; the side wall of the hemispherical electrode is provided with a first temperature sensor mounting hole; when the self-heating electrode module is adopted, the high-voltage electrode is a spherical electrode, and the spherical center of the high-voltage electrode is superposed with the spherical center of the hemispherical electrode in the self-heating electrode module.
The sampling port is positioned on the side wall of the sealed container and is used for taking out an insulating medium sample; the discharge detection device is arranged outside the sealed container and is connected with the discharge signal sensor through a signal line, and the discharge signal sensor is arranged on an external lead of the low-voltage wall bushing to obtain a discharge signal; the temperature controller is arranged outside the sealed container, is connected with the first temperature sensor and the second temperature sensor through a plate penetrating flange to obtain a temperature signal as input, and is connected with the heating power supply through a signal wire to control the power of the heating power supply so as to realize the control of the temperature of the electric heating rod and the self-heating electrode module; the first temperature sensor is arranged on the surface of the self-heating electrode module, the second temperature sensor is arranged on the surface of the electric heating rod, and the first temperature sensor and the second temperature sensor are armored temperature sensors; the electric heating rod and the heater in the self-heating electrode module are powered by a heating power supply through the plate penetrating flange; the electric heating rod is arranged in the sealed container and is separated from the high-voltage electrode and the self-heating electrode module.
The pressure detector is connected with the sealed container through a pipeline; the sensing end of the micro-water detector is arranged on the side wall of the sealed container, and the signal display end is arranged outside the sealed container, so that the monitoring of the water content in the sealed container is realized.
When the insulating medium fault simulation device works, the simulation of 3 types of thermal-electric composite faults can be realized through the temperature controller:
firstly, simulating a thermal-electrical composite fault with different overheating-discharging positions, wherein a temperature controller is connected with a heating power supply through a signal wire according to temperature signals of a first temperature sensor and a second temperature sensor to control the power of the heating power supply, so that the temperature of an electric heating rod and a self-heating electrode module is controlled, the temperature of the electric heating rod reaches the overheating fault temperature, the temperature of the self-heating electrode module is the normal operation temperature of equipment, and the discharging position is a needle electrode of the self-heating electrode module;
secondly, simulating a thermal-electrical composite fault with the same overheating-discharging position, wherein the temperature controller is connected with a heating power supply through a signal wire according to temperature signals of a first temperature sensor and a second temperature sensor to control the power of the heating power supply, so that the temperature of the electric heating rod and the temperature of the self-heating electrode module are controlled, the electric heating rod stops heating, the temperature of the self-heating electrode module is the overheating fault temperature, and the discharging position is a needle electrode of the self-heating electrode module;
and thirdly, simulating the thermal-electrical composite fault of the high-temperature-discharge composite action, wherein the temperature controller is connected with the heating power supply through a signal wire according to temperature signals of the first temperature sensor and the second temperature sensor to control the power of the heating power supply, so that the temperature of the electric heating rod and the temperature of the self-heating electrode module are controlled, the electric heating rod stops heating, the temperature of the self-heating electrode module is the electrode temperature of normal operation of the equipment, and the discharge generating position is the needle electrode of the self-heating electrode module.
Under the three working conditions, the high-voltage power supply supplies power to the high-voltage electrode and the self-heating electrode module through the high-voltage wall bushing and the low-voltage wall bushing, and the discharge signal sensor transmits a detected discharge signal to the discharge detection device to obtain discharge parameters of the fault simulation device; the pressure detector and the micro-water detector respectively obtain a gas pressure parameter and a water content parameter of the fault simulation device; the sampling port is used for collecting samples in the device fault simulation process.
Drawings
FIG. 1 is a schematic diagram of an embodiment of a thermo-electric composite insulation fault simulator in accordance with the present invention;
FIG. 2 is a schematic view of a self-heating electrode module according to a first embodiment of the present invention;
FIG. 3 is a schematic view of a self-heating electrode module according to a second embodiment of the present invention;
FIG. 4 is a schematic view of a self-heating electrode module according to a third embodiment of the present invention;
FIG. 5 is a schematic diagram of an embodiment of a self-heating electrode module and a high voltage electrode according to the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings and the detailed description.
Fig. 1 is a schematic view of an embodiment of the present invention of a thermo-electric composite insulation fault simulator. As shown in fig. 1, the insulation medium fault simulation device of the present invention includes a sealed container 2, a self-heating electrode module 1, a high-voltage electrode 4, a high-voltage wall bushing 3, a low-voltage wall bushing 17, a sample inlet 6, a sample port 7, a discharge detection device 5, a temperature controller 8, a heating power supply 9, a plate bushing flange 10, an electrical heating rod 11, a pressure detector 12, a micro-water detector 13, a discharge signal sensor 14, a first temperature sensor 15, and a second temperature sensor 16.
The sealed container 2 is filled with an insulating medium through a sample inlet 6 positioned on the side wall, a high-voltage power supply supplies power to the high-voltage electrode 4 and the self-heating electrode module 1 through a high-voltage wall bushing 3 and a low-voltage wall bushing 17 respectively, the high-voltage wall bushing 3 is positioned on the upper portion of the sealed container 2, the low-voltage wall bushing 17 is positioned on the lower portion of the sealed container 2, the high-voltage wall bushing 3 is connected with the high-voltage electrode 4 inside the sealed container 2, and the low-voltage wall bushing 17 is connected with the self-heating electrode module 1 inside the sealed container 2.
The sampling port 7 is positioned on the side wall of the sealed container 2 and is used for taking out an insulating medium sample; the discharge detection device 5 is arranged outside the sealed container 2 and is connected with the discharge signal sensor 14 through a signal line, and the discharge signal sensor 14 is arranged on an external lead of the low-voltage wall bushing 17 to obtain a discharge signal; the temperature controller 8 is arranged outside the sealed container 2, is connected with the first temperature sensor 15 and the second temperature sensor 16 through the plate penetrating flange 10 to obtain a temperature signal as input, and is connected with the heating power supply 9 through a signal wire to control the power of the heating power supply 9 so as to realize the control of the surface temperature of the electric heating rod 11 and the self-heating electrode module 1; the first temperature sensor 15 is arranged on the surface of the self-heating electrode module 1, the second temperature sensor 16 is arranged on the surface of the electric heating rod 11, and the first temperature sensor 15 and the second temperature sensor 16 are armored temperature sensors; the electric heating rod 11 and the heaters 1-10 in the self-heating electrode module 1 are powered by a heating power supply 9 through a plate penetrating flange 10; the electric heating rod 11 is arranged in the sealed container 2 and is separated from the high-voltage electrode 4 and the self-heating electrode module 1.
The pressure detector 12 is connected with the sealed container 2 through a pipeline; the sensing end of the micro-water detector 13 is arranged on the side wall of the sealed container 2, and the signal display end is arranged outside the sealed container 2, so that the monitoring of the water content in the sealed container 2 is realized.
FIG. 2 is a schematic view of a self-heating electrode module according to a first embodiment of the present invention. As shown in fig. 2, the self-heating electrode module mainly includes: the probe comprises a probe electrode 1-1, an upper plate electrode 1-2, a lower plate electrode 1-6, a heater 1-10 and heat-conducting silicone grease 1-9. The pin electrode 1-1 is fixed at the center of the upper plate electrode 1-2 by adopting threads, a heater 1-10 is arranged in a cavity formed by the upper plate electrode 1-2 and the lower plate electrode 1-6, the heater is tightly attached to the upper plate electrode 1-2, and heat-conducting silicone grease 1-9 is coated between the heater 1-10 and the upper plate electrode 1-2; the shell of the heater 1-10 is made of stainless steel material, the heater strip 1-5 is arranged in the heater 1-10, the heater strip 1-7 is filled with heat-conducting insulating material, and the heater strip 1-5 is powered by the ceramic terminal 1-4; the side wall of the upper plate electrode 1-2 is provided with a first temperature sensor 15 mounting hole 1-3; the center of the lower plate electrode 1-6 is provided with a connecting hole 1-8.
FIG. 3 is a schematic view of a self-heating electrode module according to a second embodiment of the present invention. As shown in fig. 3, the self-heating electrode module mainly includes: 1-1 parts of air gap insulating blocks, 1-2 parts of upper plate electrodes, 1-6 parts of lower plate electrodes, 1-10 parts of heaters and 1-9 parts of heat-conducting silicone grease; the air gap insulating block 1-1 is of a cylindrical structure and is fixed in the center of the upper plate electrode 1-2 by threads, and epoxy resin glue is coated between the air gap insulating block 1-1 and the upper plate electrode 1-2; a heater 1-10 is arranged in a cavity formed by the upper plate electrode 1-2 and the lower plate electrode 1-6, the heater is tightly attached to the upper plate electrode 1-2, and heat-conducting silicone grease 1-9 is coated between the heater 1-10 and the upper plate electrode 1-2; the shell of the heater 1-10 is made of stainless steel material, the heater strip 1-5 is arranged in the heater 1-10, the heater strip 1-7 is filled with heat-conducting insulating material, and the heater strip 1-5 is powered by the ceramic terminal 1-4; the side wall of the upper plate electrode 1-2 is provided with a first temperature sensor 15 mounting hole 1-3; the center of the lower plate electrode 1-6 is provided with a connecting hole 1-8; an air gap 1-11 is left between the air gap insulating block 1-1 and the upper plate electrode 1-2.
FIG. 4 is a schematic view of a self-heating electrode module according to a third embodiment of the present invention. As shown in fig. 4, the self-heating electrode mold mainly includes: 1-1 parts of a dirt insulating block, 1-2 parts of an upper plate electrode, 1-6 parts of a lower plate electrode, 1-10 parts of a heater and 1-9 parts of heat-conducting silicone grease; the pollution insulation block 1-1 is of a cylindrical structure, metal chips 1-11 are stuck on the side face of the pollution insulation block by epoxy resin glue, the pollution insulation block 1-1 is fixed in the center of the upper plate electrode 1-2 by threads, and the epoxy resin glue is coated between the air gap insulation block 1-1 and the upper plate electrode 1-2; a heater 1-10 is arranged in a cavity formed by the upper plate electrode 1-2 and the lower plate electrode 1-6, the heater 1-10 is tightly attached to the upper plate electrode 1-2, and heat-conducting silicone grease 1-9 is coated between the heater 1-10 and the upper plate electrode 1-2; the shell of the heater 1-10 is made of stainless steel material, the heater strip 1-5 is arranged in the heater 1-10, the heater strip 1-7 is filled with heat-conducting insulating material, and the heater strip 1-5 is powered by the ceramic terminal 1-4; the side wall of the upper plate electrode 1-2 is provided with a first temperature sensor 15 mounting hole 1-3; the center of the lower plate electrode 1-6 is provided with a connecting hole 1-8.
FIG. 5 is a schematic diagram of an embodiment of a self-heating electrode module and a high voltage electrode according to the present invention. As shown in fig. 5, the self-heating electrode mold mainly includes: 1-1 parts of free metal particles, 1-2 parts of hemispherical electrodes, 1-6 parts of lower plate electrodes, 1-10 parts of heaters and 1-9 parts of heat-conducting silicone grease; the free metal particles 1-1 are positioned at the bottom of the hemispherical electrode 1-2, a heater 1-10 is arranged in a cavity formed by the hemispherical electrode 1-2 and the lower plate electrode 1-6, the heater 1-10 is tightly attached to the hemispherical electrode 1-2, and heat-conducting silicone grease 1-9 is coated between the heater 1-10 and the hemispherical electrode 1-2; the shell of the heater 1-10 is made of stainless steel material, the heater strip 1-5 is arranged in the heater 1-10, the heater strip 1-7 is filled with heat-conducting insulating material, and the heater strip 1-5 is powered by the ceramic terminal 1-4; the side wall of the hemispherical electrode 1-2 is provided with a first temperature sensor 15 mounting hole 1-3; the center of the lower plate electrode 1-6 is provided with a connecting hole 1-8; the high-voltage electrode 4 is a spherical electrode, and the spherical center of the high-voltage electrode is superposed with the spherical center of the hemispherical electrode 1-2 in the self-heating electrode module 1.
Claims (5)
1. An insulation medium fault simulation device for thermal-electrical multiplexing, characterized in that: the device comprises a sealed container (2), a self-heating electrode module (1), a high-voltage electrode (4), a high-voltage wall bushing (3), a low-voltage wall bushing (17), a sample inlet (6), a sampling port (7), a discharge detection device (5), a temperature controller (8), a heating power supply (9), a plate bushing flange (10), an electric heating rod (11), a pressure detector (12), a micro-water detector (13), a discharge signal sensor (14), a first temperature sensor (15) and a second temperature sensor (16);
the high-voltage wall-penetrating device is characterized in that the sealed container (2) is filled with an insulating medium through a sample inlet (6) positioned on the side wall, a high-voltage power supply supplies power to the high-voltage electrode (4) and the self-heating electrode module (1) through a high-voltage wall-penetrating sleeve (3) and a low-voltage wall-penetrating sleeve (17), the high-voltage wall-penetrating sleeve (3) is positioned on the upper part of the sealed container (2), the low-voltage wall-penetrating sleeve (17) is positioned on the lower part of the sealed container (2), the high-voltage wall-penetrating sleeve (3) is connected with the high-voltage electrode (4) inside the sealed container (2), and the low-voltage wall-penetrating sleeve (17) is connected with the self-heating electrode module (;
the self-heating electrode module (1) is composed of a needle electrode (1-1), an upper plate electrode (1-2), a lower plate electrode (1-6), a heater (1-10) and heat-conducting silicone grease (1-9); the needle electrode (1-1) is fixed in the center of the upper plate electrode (1-2) by adopting threads, a heater (1-10) is arranged in a cavity formed by the upper plate electrode (1-2) and the lower plate electrode (1-6), the heater is tightly attached to the upper plate electrode (1-2), and heat-conducting silicone grease (1-9) is coated between the heater (1-10) and the upper plate electrode (1-2); the shell of the heater (1-10) is made of stainless steel materials, heating wires (1-5) are arranged in the heater, heat-conducting insulating materials (1-7) are filled in the heater, and the heating wires (1-5) are powered through ceramic terminals (1-4); the side wall of the upper plate electrode (1-2) is provided with a first temperature sensor (15) mounting hole (1-3); the center of the lower plate electrode (1-6) is provided with a connecting hole (1-8); the high-voltage electrode (4) is in a Bruce electrode form;
the sampling port (7) is positioned on the side wall of the sealed container (2) and is used for taking out an insulating medium sample; the discharge detection device (5) is arranged outside the sealed container (2) and is connected with the discharge signal sensor (14) through a signal line, and the discharge signal sensor (14) is arranged on an external lead of the low-voltage wall bushing (17) to obtain a discharge signal; the temperature controller (8) is arranged outside the sealed container (2), is connected with the first temperature sensor (15) and the second temperature sensor (16) through a plate penetrating flange (10) to obtain a temperature signal as input, is connected with the heating power supply (9) through a signal wire at the same time, controls the power of the heating power supply (9), and realizes the control of the temperature of the electric heating rod (11) and the self-heating electrode module (1); the first temperature sensor (15) is arranged on the surface of the self-heating electrode module (1), the second temperature sensor (16) is arranged on the surface of the electric heating rod (11), and the first temperature sensor (15) and the second temperature sensor (16) are armored temperature sensors; the electric heating rod (11) and heaters (1-10) in the self-heating electrode module (1) are powered by a heating power supply (9) through a plate penetrating flange (10); the electric heating rod (11) is arranged in the sealed container (2) and is separated from the high-voltage electrode (4) and the self-heating electrode module (1);
the pressure detector (12) is connected with the sealed container (2) through a pipeline; the sensing end of the micro-water detector (13) is arranged on the side wall of the sealed container (2), and the signal display end is arranged outside the sealed container (2), so that the monitoring of the water content in the sealed container (2) is realized.
2. The combined thermal-electrical acting insulation medium fault simulation apparatus of claim 1, wherein: when the insulating medium fault simulation device works, the simulation of 3 types of thermal-electric composite faults is realized through the temperature controller (8):
firstly, simulating thermal-electrical composite faults with different overheating-discharging positions, wherein a temperature controller (8) is connected with a heating power supply (9) through a signal wire according to temperature signals of a first temperature sensor (15) and a second temperature sensor (16) to control the power of the heating power supply (9) so as to control the temperatures of an electric heating rod (11) and a self-heating electrode module (1), so that the temperature of the electric heating rod (11) reaches a preset overheating fault temperature, and the temperature of the self-heating electrode module (1) is a preset normal operation temperature of equipment; the discharge generating position is a needle electrode (1-1) of the self-heating electrode module (1);
secondly, simulating a thermal-electrical composite fault with the same overheating-discharging position, wherein at the moment, a temperature controller (8) is connected with a heating power supply (9) through a signal line according to temperature signals of a first temperature sensor (15) and a second temperature sensor (16) to control the power of the heating power supply (9) so as to control the temperatures of an electric heating rod (11) and a self-heating electrode module (1), the electric heating rod (11) stops heating, the temperature of the self-heating electrode module (1) is a preset overheating fault temperature, and the discharging position is a needle electrode (1-1) of the self-heating electrode module (1);
thirdly, simulating a heat-electricity composite fault of a high-temperature-discharge composite action, wherein at the moment, a temperature controller (8) is connected with a heating power supply (9) through a signal wire according to temperature signals of a first temperature sensor (15) and a second temperature sensor (16) to control the power of the heating power supply (9) so as to control the temperatures of an electric heating rod (11) and a self-heating electrode module (1), the electric heating rod (11) stops heating, the temperature of the self-heating electrode module (1) is the electrode temperature of normal operation of equipment, and a discharge generating position is a needle electrode (1-1) of the self-heating electrode module (1);
under the three working modes, a high-voltage power supply supplies power to the high-voltage electrode (4) and the self-heating electrode module (1) through the high-voltage wall bushing (3) and the low-voltage wall bushing (17), and the discharge signal sensor (14) transmits a detected discharge signal to the discharge detection device (5) to obtain discharge parameters of the fault simulation device; the pressure detector (12) and the micro-water detector (13) respectively obtain a gas pressure parameter and a water content parameter of the fault simulation device; the sampling port (7) is used for collecting samples in the device fault simulation process.
3. The combined thermal-electrical acting insulation medium fault simulation apparatus of claim 1, wherein: the self-heating electrode module (1) is composed of an air gap insulating block (1-1), an upper plate electrode (1-2), a lower plate electrode (1-6), a heater (1-10) and heat-conducting silicone grease (1-9); the air gap insulating block (1-1) is of a cylindrical structure and is fixed in the center of the upper plate electrode (1-2) by adopting threads, and epoxy resin glue is coated between the air gap insulating block (1-1) and the upper plate electrode (1-2); a heater (1-10) is arranged in a cavity formed by the upper plate electrode (1-2) and the lower plate electrode (1-6), the heater is tightly attached to the upper plate electrode (1-2), and heat-conducting silicone grease (1-9) is coated between the heater (1-10) and the upper plate electrode (1-2); the shell of the heater (1-10) is made of stainless steel materials, heating wires (1-5) are arranged in the heater, heat-conducting insulating materials (1-7) are filled in the heater, and the heating wires (1-5) are powered through ceramic terminals (1-4); the side wall of the upper plate electrode (1-2) is provided with a mounting hole (1-3) of a first temperature sensor (15); the center of the lower plate electrode (1-6) is provided with a connecting hole (1-8); an air gap (1-11) is reserved between the air gap insulating block (1-1) and the upper plate electrode (1-2); the high-voltage electrode (4) is in a Bruce electrode form; and the air gap insulating block (1-1) and the high-voltage electrode (4) are precisely attached by epoxy resin glue.
4. The combined thermal-electrical acting insulation medium fault simulation apparatus of claim 1, wherein: the self-heating electrode module (1) is composed of a dirt insulating block (1-1), an upper plate electrode (1-2), a lower plate electrode (1-6), a heater (1-10) and heat-conducting silicone grease (1-9); the pollution insulation block (1-1) is of a cylindrical structure, metal scraps (1-11) adhered by epoxy resin glue are arranged on the side face of the pollution insulation block, the pollution insulation block (1-1) is fixed in the center of the upper plate electrode (1-2) by threads, and epoxy resin glue is coated between the air gap insulation block (1-1) and the upper plate electrode (1-2); a heater (1-10) is arranged in a cavity formed by the upper plate electrode (1-2) and the lower plate electrode (1-6), the heater is tightly attached to the upper plate electrode (1-2), and heat-conducting silicone grease (1-9) is coated between the heater (1-10) and the upper plate electrode (1-2); the shell of the heater (1-10) is made of stainless steel materials, heating wires (1-5) are arranged in the heater, heat-conducting insulating materials (1-7) are filled in the heater, and the heating wires (1-5) are powered through ceramic terminals (1-4); the side wall of the upper plate electrode (1-2) is provided with a first temperature sensor (15) mounting hole (1-3); the center of the lower plate electrode (1-6) is provided with a connecting hole (1-8); the high-voltage electrode (4) is in a Bruce electrode form; the filthy insulating block (1-1) and the high-voltage electrode (4) are precisely attached by epoxy resin glue.
5. The combined thermal-electrical acting insulation medium fault simulation apparatus of claim 1, wherein: the self-heating electrode module (1) is composed of free metal particles (1-1), hemispherical electrodes (1-2), lower plate electrodes (1-6), heaters (1-10) and heat-conducting silicone grease (1-9); the free metal particles (1-1) are positioned at the bottom of the hemispherical electrode (1-2), a heater (1-10) is arranged in a cavity formed by the hemispherical electrode (1-2) and the lower plate electrode (1-6), the heater (1-10) is tightly attached to the hemispherical electrode (1-2), and heat-conducting silicone grease (1-9) is coated between the heater (1-10) and the hemispherical electrode (1-2); the shell of the heater (1-10) is made of stainless steel materials, heating wires (1-5) are arranged in the heater, heat-conducting insulating materials (1-7) are filled in the heater, and the heating wires (1-5) are powered through ceramic terminals (1-4); the side wall of the hemispherical electrode (1-2) is provided with a mounting hole (1-3) of a first temperature sensor (15); the center of the lower plate electrode (1-6) is provided with a connecting hole (1-8); the high-voltage electrode (4) is a spherical electrode, and the spherical center of the high-voltage electrode coincides with the spherical center of the hemispherical electrode (1-2) in the self-heating electrode module (1).
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| CN110568326B (en) * | 2019-09-02 | 2022-10-11 | 国网甘肃省电力公司电力科学研究院 | Electric-thermal combined aging and gas decomposition test device and application method |
| CN110780165A (en) * | 2019-11-08 | 2020-02-11 | 西南交通大学 | Transformer winding overheating inter-turn insulation material degradation testing device and testing method |
| CN112710932B (en) * | 2020-12-22 | 2022-07-01 | 华北电力大学 | SF under combined action of electricity and heat6And substitute gaseous life cycle insulating properties test device thereof |
| CN113406488A (en) * | 2021-06-16 | 2021-09-17 | 国网安徽省电力有限公司电力科学研究院 | GIS internal overheating fault test device and test method |
| CN113588711B (en) * | 2021-06-24 | 2023-02-28 | 南方电网科学研究院有限责任公司 | Calculation device and calculation method for severe thermal decomposition area of gas insulation medium |
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| CN201926732U (en) * | 2011-01-06 | 2011-08-10 | 山东电力研究院 | Experimental device for electrical/thermal stress aging of insulation oil paper of voltage transformer |
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