CN211785906U - GIS insulation defect monitoring device and system - Google Patents
GIS insulation defect monitoring device and system Download PDFInfo
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- CN211785906U CN211785906U CN201921644532.3U CN201921644532U CN211785906U CN 211785906 U CN211785906 U CN 211785906U CN 201921644532 U CN201921644532 U CN 201921644532U CN 211785906 U CN211785906 U CN 211785906U
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Abstract
The embodiment of the utility model discloses a GIS insulation defect monitoring device and a system, wherein the GIS insulation defect monitoring device comprises a voltage adjusting module, an overheated closed air chamber, a physical defect detecting module, a thermometer and a mass spectrometer; the input end of the voltage regulating module is used for inputting alternating current, and the output end of the voltage regulating module outputs adjustable voltage; the physical defect detection module is arranged in the overheated closed air chamber and is electrically connected with the output end of the voltage regulation module; the wall of the overheated closed gas chamber is provided with a sampling port and a detection port, the mass spectrometer detects gas components in the overheated closed gas chamber through the sampling port, and the thermometer collects the temperature in the overheated closed gas chamber through the detection port. The embodiment of the utility model provides a can take place the overheat defect to GIS equipment inside and carry out real-time supervision, be convenient for form the diagnosis decision-making tree with the data of gathering.
Description
Technical Field
The embodiment of the utility model provides a GIS defect detecting field especially relates to a GIS insulation defect monitoring devices and system.
Background
Gas Insulated Switchgear (GIS) is a critical device in power transmission and transformation systems and, in the event of a fault, threatens the safe operation of the power system. The aging of the inner insulation of the GIS under the action of operating voltage, heat, force and the like and various latent defects generated or left in the processes of production, transportation, debugging, assembly, operation and maintenance can be gradually expanded to cause the electrical strength of the inner insulation to be reduced to cause faults, so that the inner insulation state of the GIS equipment is important for the operation and maintenance of the GIS.
When SF6When the gas insulated apparatus has an internal overheat insulation defect, a local high temperature is generated to cause SF6The gas is decomposed and the insulation performance is reduced. The prior art cannot accurately monitor the local overheating defect of the GIS equipment in real time and cannot effectively detect SF6A gas decomposition component.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides a GIS insulation defect monitoring devices and system to realize can accurately monitoring GIS equipment local overheat nature defect in real time, and can effectively detect out SF6A gas decomposition component. Therefore, the aims of fault diagnosis and state evaluation of the GIS equipment are fulfilled.
In a first aspect, an embodiment of the utility model provides a GIS insulation defect monitoring device, including a voltage regulation module, an overheated closed air chamber, a physical defect detection module, a thermometer and a mass spectrometer;
the input end of the voltage regulating module is used for inputting alternating current, and the output end of the voltage regulating module outputs adjustable voltage;
the physical defect detection module is arranged in the overheated closed air chamber and is electrically connected with the output end of the voltage regulation module;
the wall of the overheated closed gas chamber is provided with a sampling port and a detection port, the mass spectrometer detects gas components in the overheated closed gas chamber through the sampling port, and the thermometer detects the temperature in the overheated closed gas chamber through the detection port.
Optionally, the GIS insulation defect monitoring device further includes a limiting device;
the amplitude limiting device is connected in series in a power supply loop of the physical defect detection module.
Optionally, the GIS insulation defect monitoring device further includes a temperature controller and a temperature sensor;
the input end of the temperature controller is electrically connected with the output end of the voltage regulating module through the amplitude limiting device, the output end of the temperature controller is electrically connected with the input end of the temperature sensor, and the output end of the temperature sensor is electrically connected with the thermometer.
Optionally, the physical defect detection module includes a power line, a thermocouple and a heating wire;
the heating wire is electrically connected with the voltage regulating module through the power line, and the thermocouple is electrically connected with the heating wire.
Optionally, the physical defect detection module further includes a signal lead;
the first end of the signal lead is electrically connected with the thermocouple, and the second end of the signal lead is electrically connected with the input end of the temperature sensor.
Optionally, the physical defect detection module is electrically connected to the output end of the voltage regulation module, and includes:
the wall of the overheated closed air chamber is provided with a power line through hole, the physical defect detection module is electrically connected with the output end of the voltage regulation module through a sleeve, and the sleeve penetrates through the power line through hole.
Optionally, the voltage regulating module includes a voltage regulator, a first resistor, a second resistor, and a voltage dividing circuit;
the input end of the voltage regulator is used for accessing alternating-current voltage, the first output end of the voltage regulator is electrically connected with the first end of the first resistor, the second end of the first resistor is electrically connected with the first end of the second resistor, and the second end of the second resistor is electrically connected with the amplitude limiting device;
the first end of the voltage division circuit is electrically connected with the second end of the first resistor, and the second end of the voltage division circuit is grounded with the second output end of the voltage regulator.
Optionally, the voltage dividing circuit includes a first capacitor and a second capacitor;
the first end of the first capacitor is electrically connected with the second end of the first resistor, and the second end of the first capacitor is grounded through the second capacitor.
Optionally, the amplitude limiting device includes a first diode and a second diode;
the first diode and the second diode are connected in anti-parallel.
In a second aspect, an embodiment of the present invention provides a GIS defect monitoring system, which includes a GIS insulation defect monitoring device, a discharge air chamber and a sampling module;
a discharge electrode is arranged in the discharge air chamber and is electrically connected with the output end of the voltage regulating module;
the input end of the sampling module is electrically connected with the discharge electrode, and the output end of the sampling module is grounded.
Optionally, the discharge electrode comprises a first electrode and a second electrode;
the first electrode is a high-voltage electrode and is electrically connected with the output end of the voltage regulating module; the second electrode is a grounding electrode;
the discharge electrode comprises at least one of a pin-plate electrode, a concentric sphere-bowl electrode, or a plate-plate electrode.
Optionally, a sampling hole is formed in the wall of the discharge gas chamber, and the mass spectrometer detects the gas component in the discharge gas chamber through the sampling hole.
Optionally, the sampling module includes a third capacitor and a third resistor;
a first end of the third capacitor is electrically connected with a voltage receiving end of the first electrode, a second end of the third capacitor is electrically connected with a first end of the third resistor, and a second end of the third resistor is grounded;
and the third resistor is connected with the oscilloscope in parallel.
The embodiment of the utility model provides a technical scheme adopts the overheated nature defect of physical defect detection module simulation GIS equipmentReal-time monitoring of overheating defects by thermometer and mass spectrometer and detection of SF6A gas decomposition component. The utility model discloses implement and can accurately monitor GIS equipment local overheat nature defect in real time, and can effectively detect out SF6And the gas decomposes the components, so that the aims of fault diagnosis and state evaluation of the GIS equipment are fulfilled, and the collected data can be conveniently formed into a diagnosis decision tree.
Drawings
Fig. 1 is a schematic structural diagram of a GIS insulation defect monitoring device according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of another GIS insulation defect monitoring device according to a first embodiment of the present invention;
fig. 3 is a schematic structural diagram of another GIS insulation defect monitoring device according to a first embodiment of the present invention;
fig. 4 is a schematic structural diagram of another GIS insulation defect monitoring device according to a first embodiment of the present invention;
fig. 5 is a schematic structural diagram of a GIS defect monitoring system provided by the embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a schematic structural view of a GIS insulation defect monitoring device provided in an embodiment of the present invention, referring to fig. 1, the GIS insulation defect monitoring device provided in an embodiment of the present invention includes a voltage regulation module 10, an overheated closed air chamber 20, a physical defect detection module 30, a thermometer 40, and a mass spectrometer 50;
an input end A1 of the voltage regulation module 10 is used for inputting alternating current, and an output end A2 of the voltage regulation module 10 outputs adjustable voltage;
the physical defect detection module 30 is arranged in the overheated closed air chamber 20, and the physical defect detection module 30 is electrically connected with the output end A2 of the voltage regulation module 10;
the wall of the overheated closed air chamber 20 is provided with a sampling port 210 and a detection port 220, the mass spectrometer 50 detects the gas component in the overheated closed air chamber 20 through the sampling port 210, and the thermometer 40 detects the temperature in the overheated closed air chamber 20 through the detection port 220.
The local overheating defects are defects of poor contact, short circuit or magnetic saturation and the like in the running process of the GIS equipment, if the defects are not processed in time, the local overheating of the GIS equipment can be caused to generate high temperature, and SF (sulfur hexafluoride) at the high temperature6The gas is decomposed, so that the insulating property is reduced, and the GIS equipment can be stopped seriously. The embodiment of the utility model provides an adopt physical defect detection module 30 to simulate the local overheated nature defect of GIS equipment, overheated airtight air chamber 20 provides airtight environment for physical defect detection module 30, guarantees SF6The gas is not disturbed by air when the gas is decomposed by overheating.
Specifically, the voltage adjusting module 10 converts the ac voltage into a test voltage required by the discharge electrode, and the test voltage output by the voltage adjusting module 10 is adjustable. For example, the voltage regulation module 10 may be a variable transformer, and the voltage regulation module 10 regulates the heat applied to the physical defect detection module 30 to change the heat generation amount of the physical defect detection module 30. The thermometer 40 detects the real-time temperature of the surfaces of the overheated closed air cell 20 and the physical defect inspection module 30 when the temperature of the surface of the physical defect inspection module 30 reaches SF6At the decomposition temperature of the gas, SF6The gas undergoes thermal decomposition to produce a plurality of decomposed components, and SF can be detected by mass spectrometer 506Decomposition components and contents of gas. Illustratively, the physical defect detection module 30 is a physical defect model of the GIS device, which is used for detecting the local high temperature pair SF generated by the local overheating fault of the GIS device6The influence of the decomposition components. Illustratively, referring to fig. 1, the physical defect detection module 30 may be powered by the voltage regulation module 10, the physical defect detection module 30 is disposed in the overheated closed gas chamber 20, and the overheated closed gas chamber 20 is used for SF6The decomposition provides a closed environment in which the material is,while isolating the external environment from the SF6The decomposition is influenced, such as the micro-water and micro-oxygen in the air can affect SF6The decomposition and the detection of the decomposition components cause interference.
Optionally, fig. 2 is a schematic structural diagram of another GIS insulation defect monitoring device provided in the first embodiment of the present invention, and on the basis of the first embodiment, referring to fig. 2, the GIS insulation defect monitoring device further includes an amplitude limiting device 60; the amplitude limiting device 60 is connected in series with the power supply loop of the physical defect detection module 30.
Illustratively, the physical defect detection module 30 is powered by the voltage regulation module 10, the amplitude limiting device 60 is connected in series in the power supply loop of the physical defect detection module 30, and the amplitude limiting device 60 is configured to limit the amplitude of the input voltage, so as to prevent the physical defect detection module 30 from being irreversibly damaged by sudden changes of the input voltage. The amplitude limiting device 60 may also be directly electrically connected to the mains supply, and is configured to limit the amplitude of the mains supply voltage, and directly supply power to the physical defect detection module 30 through the mains supply.
Optionally, with continued reference to fig. 2, the GIS insulation defect monitoring apparatus further comprises a temperature controller 70 and a temperature sensor 80;
the input end of the temperature controller 70 is electrically connected with the output end a2 of the voltage regulating module 10 through the amplitude limiting device 60, the output end of the temperature controller 70 is electrically connected with the input end of the temperature sensor 80, and the output end of the temperature sensor 80 is electrically connected with the thermometer 40.
Specifically, temperature controller 70 is used to monitor and control the real-time temperature of physical defect detecting module 30, for example, temperature controller 70 may be composed of a PID control circuit and a display screen, where the PID control circuit is combined with voltage regulating module 10 to control the temperature of the surface of physical defect detecting module 30 and monitor the real-time temperature of the surface of physical defect detecting module 30 through the display screen. The temperature sensor 80 is disposed on the physical defect detecting module 30, and is in contact connection or electrical connection with the physical defect detecting module 30, and is used for directly detecting the temperature of the physical defect detecting module 30. The output end of the temperature sensor 80 is connected with the thermometer 40, and the thermometer 40 collects the temperature signal output by the temperature sensor 80 and displays the collected temperature. For example, the temperature sensor 80 collects real-time temperature of the surface of the physical defect detection module 30, and generates a usable signal output according to the collected temperature signal, wherein the usable signal may be a converted temperature signal, a converted voltage signal, a converted current signal, or a converted pressure signal, and the thermometer 40 displays the temperature of the surface of the physical defect detection module 30 and the temperature inside the overheated closed gas chamber 20 according to the received usable signal.
The wall of the overheated closed gas chamber 20 is provided with a sampling port 210 and a detection port 220, the sampling port 210 is connected with the mass spectrometer 50 through a pipeline, so that the mass spectrometer 50 can conveniently collect SF in the overheated closed gas chamber 206The gas decomposes the components and the detection port 220 is connected to the thermometer 40. The mass spectrometer 50 is a gas chromatograph mass spectrometer for detecting SF in the event of local overheating of the GIS equipment6The thermometer 40 is used for detecting the surface temperature of the physical defect detection module 30 and the temperature in the overheated closed air chamber 20 when local overheating occurs, and the temperature is adjusted by the temperature controller 70 to realize collection of SF at different temperatures6Gas decomposition component, and temperature vs. SF6And the collected data can form a diagnosis decision tree conveniently, so that the insulation defect of the GIS equipment can be diagnosed and evaluated.
Optionally, fig. 3 is a schematic structural diagram of another GIS insulation defect monitoring apparatus according to an embodiment of the present invention, and referring to fig. 3, the physical defect detecting module 30 includes a power line 304, a thermocouple 302, and a heating wire 303;
the heating wire 303 is electrically connected to the voltage regulating module 10 through a power line 304, and the thermocouple 302 is connected to the heating wire 303.
Specifically, the iron core 301 may be used as a shell of the physical defect detection module 30, and a material of a fault location when the GIS device has an overheat fault is simulated, for example, the shell of the physical defect detection module 30 is the iron core 301, magnesium oxide is filled inside the shell to realize good thermal conductivity, and two ends of the shell of the physical defect detection module 30 may be packaged with ceramic to ensure the sealing performance of the physical defect detection module 30. The heating wire 302 is electrically connected to the voltage regulating module 10, and can generate and output voltage according to the output voltage of the voltage regulating module 10Corresponding heat quantity, the heat quantity generated by the electric heating wire 302 is used for realizing SF6Decomposition of the gas, the decomposition component of SF6 gas was detected by mass spectrometer 50. The thermocouple 303 may be a K-type thermocouple for measuring the temperature of the heating wire 302, and the thermocouple 303 may be formed of a temperature sensing element, and the temperature of the heating wire 302 is measured by using a thermoelectric effect of the thermocouple.
Optionally, with continued reference to fig. 3, the physical defect detection die 30 further includes a signal lead 305;
a first end of the signal lead 305 is electrically connected to the thermocouple 303, and a second end of the signal lead 305 is electrically connected to an input terminal of the temperature sensor 80.
Specifically, the signal lead 305 is used to output the temperature of the heating wire 302 measured by the thermocouple 303 to the thermometer 40 through the temperature sensor 80, and the thermometer 40 displays the temperature of the heating wire 302, where the temperature of the heating wire 302 is the surface temperature of the physical defect detection mold 30.
Optionally, with continued reference to fig. 3, a power line through hole 230 is formed in the wall of the overheated closed air chamber 20, and the physical defect detecting module 30 is electrically connected to the output end a2 of the voltage regulating module 10 through a sleeve, and the sleeve penetrates through the power line through hole 230. The sleeve can protect the power line from abrasion in the power line through hole, and the reliability of the power supply loop is guaranteed.
Optionally, fig. 4 is a schematic structural diagram of another GIS insulation defect monitoring apparatus according to an embodiment of the present invention, and referring to fig. 4, on the basis of the above embodiment, the voltage regulating module 10 includes a voltage regulator T1, a first resistor R1, a second resistor R2, and a voltage dividing circuit 110;
the input end of the voltage regulator T1 is used for accessing an alternating-current voltage, the first output end of the voltage regulator T1 is electrically connected with the first end of the first resistor R1, the second end of the first resistor R1 is electrically connected with the first end of the second resistor R2, and the second end of the second resistor R2 is electrically connected with the amplitude limiting device 60;
the first end of the voltage dividing circuit 110 is electrically connected to the second end of the first resistor R1, and the second end of the voltage dividing circuit 110 and the second output end of the voltage regulator T1 are grounded.
Specifically, the voltage regulator T1 may adjust the input ac voltage, the first resistor R1 is a protection resistor for limiting damage to the GIS device when the GIS device is broken down or flashover and an overcurrent generated by charging the input ac voltage to the voltage dividing circuit 110, and the second resistor R2 is a protection resistor for protecting the temperature controller 70 when the GIS device is broken down.
Optionally, with continued reference to fig. 4, the clipping device 60 includes a first diode D1 and a second diode D2;
the first diode D1 and the second diode D2 are connected in anti-parallel.
The first diode D1 and the second diode D2 are connected in parallel in an inverse direction, and together form a limiting circuit for limiting the input voltage of the temperature controller 70.
Optionally, the voltage divider circuit 110 includes a first capacitor C1 and a second capacitor C2. The first end of the first capacitor C1 is electrically connected to the second end of the first resistor R1, and the second end of the first capacitor C1 is grounded through the second capacitor C2.
Specifically, the first capacitor C1 and the second capacitor C2 form a voltage dividing circuit, the alternating-current voltage output by the voltage regulator T1 is converted into low-voltage alternating current, and the first capacitor C1 and the second capacitor C2 do not consume energy in the voltage conversion process, so that capacitors are used for dividing voltage in the alternating-current signal circuit.
The embodiment of the utility model provides a technical scheme, through the overheated nature defect that adopts physical defect detection module simulation GIS equipment, carry out real-time supervision to overheated nature defect through thermometer and mass spectrograph to detect SF6A gas decomposition component. The utility model discloses implement and can accurately monitor GIS equipment local overheat nature defect in real time, and can effectively detect out SF6And the gas decomposes the components, so that the aims of fault diagnosis and state evaluation of the GIS equipment are fulfilled, and the collected data can be conveniently formed into a diagnosis decision tree.
Example two
Fig. 5 is a schematic structural diagram of a GIS defect monitoring system provided by the second embodiment of the present invention, and referring to fig. 5, the GIS defect monitoring system includes a GIS insulation defect monitoring device provided by the first embodiment, and further includes a discharge air chamber 90 and a sampling module 100;
a discharge electrode is arranged in the discharge gas chamber 90 and is electrically connected with the output end A2 of the voltage regulation module 10;
the input end of the sampling module 100 is electrically connected with the discharge electrode, and the output end of the sampling module 100 is grounded.
Specifically, the partial discharge is a discharge phenomenon that the discharge occurs only in a partial area of the GIS device, and does not penetrate between conductors to which a voltage is applied, and the partial discharge is a common defect of the GIS device. Partial discharge of SF in GIS equipment6The gas takes place to decompose, the embodiment of the utility model provides an adopt discharge electrode simulation GIS equipment partial discharge. The voltage adjusting module 10 converts the alternating voltage into a test voltage required by the discharge electrode, and the test voltage output by the voltage adjusting module 10 is adjustable. For example, the voltage adjusting module 10 may be an adjustable transformer, the voltage adjusting module 10 adjusts the test voltage applied to the discharge electrode to change the discharge intensity of the discharge electrode, each discharge intensity corresponds to a discharge amount, the sampling module 100 collects the voltage pulse signal generated by the discharge electrode, the oscilloscope receives the voltage pulse signal, so as to realize real-time monitoring of the discharge amount in the discharge gas chamber 90, and the mass spectrometer 50 can detect SF6Gas decomposition of the components to obtain SF at different test voltages6And decomposing the components by the gas, thereby realizing fault diagnosis and state evaluation of the GIS equipment, wherein the mass spectrometer 50 can be a gas chromatography mass spectrometer.
Optionally, the sampling module 100 includes a third capacitor C3 and a third resistor R3;
a first end of the third capacitor C3 is electrically connected with the voltage receiving end of the first electrode, a second end of the third capacitor C3 is electrically connected with a first end of the third resistor R3, and a second end of the third resistor R3 is grounded; the oscilloscope is connected in parallel with the third resistor R3.
Specifically, the third capacitor C3 is a coupling capacitor for coupling the local discharge pulse current generated by the discharge electrode in the discharge chamber 90 to the third resistor R3, the third resistor R3 is a non-inductive detection resistor, the pulse current signal can be converted into a corresponding pulse voltage signal by the non-inductive detection resistor, and the oscilloscope 200 receives the pulse voltage signalAnd the number is used for realizing the real-time monitoring of the partial discharge of the discharge electrode and calibrating the partial discharge amount. Partial discharge can cause SF in GIS equipment6The gas is decomposed, resulting in a reduction in the insulation performance of the GIS device. Different applied voltages are adjusted through the voltage adjusting module 10, the partial discharge amount is different due to different uneven electric field intensities generated by the discharge electrodes according to the different applied voltages, and therefore SF in the discharge gas chamber 90 can be detected through the mass spectrometer 506The decomposition component (c). By integrating SF under different applied voltages6And the data of the components are decomposed, so that the insulation defect of the GIS equipment can be diagnosed and evaluated.
Optionally, with continued reference to fig. 5, a sampling aperture 910 is provided in the wall of the discharge gas chamber 90, and the mass spectrometer 50 detects the gas component in the discharge gas chamber 90 through the sampling aperture 910.
With continued reference to fig. 5, the discharge electrodes include a first electrode 920 and a second electrode 930.
The first electrode 920 is a high voltage electrode, and the first electrode 920 is electrically connected with the output end a2 of the voltage regulating module 10; the second electrode 930 is a ground electrode. The discharge electrode comprises at least one of a pin-plate electrode, a concentric sphere-bowl electrode, or a plate-plate electrode.
Specifically, the first electrode 920 is a high voltage discharge electrode for generating an electric field, and the first electrode 920 may generate electric fields with different intensities according to the voltage output by the voltage adjusting module 10, so as to obtain SF with different partial discharge intensities6Decomposing the components; the second electrode 930 is a ground electrode, and forms a discharge circuit with the first electrode 920.
For example, the first electrode 920 may be a pin electrode, the second electrode 930 may be a plate electrode, and the pin-plate electrode may be used to simulate a metal protrusion insulation defect of a GIS device. The metal protrusion insulation defect refers to an abnormal protruding metal object which exists on an electrode and can distort a local electric field, and the metal protrusion defect is usually caused by processing technology, assembly damage, maintenance and leaving, running friction and the like. The small curvature radius of the end of the protrusion causes electric field distortion, and local strong electric field region is formed, so that SF6Gas decomposition to cause insulation of GIS equipmentThe edge strength is reduced, and the serious threat to the operation safety of equipment is formed. For example, the first electrode 920 has an electrode taper angle of 30 ° and a curvature radius of 0.3mm, and the first electrode may be made of aluminum or copper material for simulating a protrusion point on the high-voltage conductor; the second electrode 930 may be a plate electrode made of aluminum, copper or stainless steel, and is used to simulate a metal cavity housing of a GIS device.
For example, the first electrode 920 may be a concentric sphere electrode, and the second electrode 930 may be a bowl electrode, where the concentric sphere-bowl electrode is used to simulate the defect of free conductive particles of the GIS device, and the free conductive particles refer to metal particles or debris existing between the electrodes and capable of freely jumping under the action of an electric field. For example, the first electrode 920 may be a concentric sphere electrode made of stainless steel, and the second electrode 930 may be a bowl electrode made of a hollow sphere made of stainless steel; particles of copper or aluminum may be used to simulate free conductive particles. The bowl electrode can limit the jumping range of the free conductive particles, prevent the particles from jumping out of the electrode to change the discharge state, and enable the partial discharge to be continuously and stably carried out.
For example, the first electrode 920 may be a plate electrode, and the second electrode 930 may also be a plate electrode, and is used to simulate a surface contamination defect of an insulator of the GIS device, where the surface contamination defect of the insulator refers to a contamination attached to a surface of a solid insulation, and may adsorb a certain amount of metal particles, and the metal particles may be continuously aggregated under the action of an electric field force, and if the metal particles are aggregated to a certain extent, the surface electric field of the solid insulation may be seriously distorted, so as to excite partial discharge. A plate-plate electrode is used to generate a non-uniform electric field in the discharge chamber 90, the solid insulator can be cylindrical epoxy resin, and the solid insulator is connected with the plate-plate electrode and used for supporting the plate-plate electrode.
The embodiment of the utility model provides a technical scheme provides, provide voltage for discharging the air chamber through voltage regulation module, gather and confirm through sampling module and mass spectrograph that discharge the indoor SF of air chamber6The gas decomposition product can accurately identify the type and severity of internal defects of the GIS equipment, and the physical defect detection module, the temperature controller and the temperature sensor can monitor the insulation of local overheating to the GIS equipmentInfluence of properties, and detection of different temperature on SF6The effect of gas decomposition components. The embodiment of the utility model provides a local discharge insulation defect and the local overheat insulation defect that can monitor GIS equipment simultaneously have realized the detection of multiple GIS defect, are convenient for form the diagnosis decision tree with the data of gathering, realize diagnosing the aassessment to the insulation defect of GIS equipment.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. A GIS insulation defect monitoring device is characterized by comprising a voltage regulation module, a superheat closed gas chamber, a physical defect detection module, a thermometer and a mass spectrometer;
the input end of the voltage regulating module is used for inputting alternating current, and the output end of the voltage regulating module outputs adjustable voltage;
the physical defect detection module is arranged in the overheated closed air chamber and is electrically connected with the output end of the voltage regulation module;
the wall of the overheated closed gas chamber is provided with a sampling port and a detection port, the mass spectrometer detects gas components in the overheated closed gas chamber through the sampling port, and the thermometer detects the temperature in the overheated closed gas chamber through the detection port.
2. The GIS insulation defect monitoring device of claim 1, further comprising a limiting device;
the amplitude limiting device is connected in series in a power supply loop of the physical defect detection module.
3. The GIS insulation defect monitoring device of claim 2, further comprising a temperature controller and a temperature sensor;
the input end of the temperature controller is electrically connected with the output end of the voltage regulating module through the amplitude limiting device, the output end of the temperature controller is electrically connected with the input end of the temperature sensor, and the output end of the temperature sensor is electrically connected with the thermometer.
4. The GIS insulation defect monitoring device of claim 3, wherein the physical defect detection module comprises a power line, a thermocouple and a heating wire;
the heating wire is electrically connected with the voltage regulating module through the power line, and the thermocouple is electrically connected with the heating wire.
5. The GIS insulation defect monitoring device of claim 4, wherein the physical defect detection module further comprises a signal lead;
the first end of the signal lead is electrically connected with the thermocouple, and the second end of the signal lead is electrically connected with the input end of the temperature sensor.
6. The GIS insulation defect monitoring device of claim 1, wherein the physical defect detection module is electrically connected to the output of the voltage regulation module and comprises:
the wall of the overheated closed air chamber is provided with a power line through hole, the physical defect detection module is electrically connected with the output end of the voltage regulation module through a sleeve, and the sleeve penetrates through the power line through hole.
7. The GIS insulation defect monitoring device of claim 2 wherein the voltage regulation module comprises a voltage regulator, a first resistor, a second resistor, and a voltage divider circuit;
the input end of the voltage regulator is used for accessing alternating-current voltage, the first output end of the voltage regulator is electrically connected with the first end of the first resistor, the second end of the first resistor is electrically connected with the first end of the second resistor, and the second end of the second resistor is electrically connected with the amplitude limiting device;
the first end of the voltage division circuit is electrically connected with the second end of the first resistor, and the second end of the voltage division circuit is grounded with the second output end of the voltage regulator.
8. The GIS insulation defect monitoring device of claim 2 wherein the limiting means comprises a first diode and a second diode;
the first diode and the second diode are connected in anti-parallel.
9. A GIS insulation defect monitoring system comprising the GIS insulation defect monitoring device of any one of claims 1-8, further comprising a discharge gas cell and a sampling module;
a discharge electrode is arranged in the discharge air chamber and is electrically connected with the output end of the voltage regulating module;
the input end of the sampling module is electrically connected with the discharge electrode, and the output end of the sampling module is grounded.
10. The GIS insulation defect monitoring system of claim 9 wherein the discharge electrode comprises a first electrode and a second electrode;
the first electrode is a high-voltage electrode and is electrically connected with the output end of the voltage regulating module; the second electrode is a grounding electrode;
the discharge electrode comprises at least one of a pin-plate electrode, a concentric sphere-bowl electrode, or a plate-plate electrode.
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| CN110514976A (en) * | 2019-09-29 | 2019-11-29 | 国网江苏省电力有限公司 | A kind of GIS insulation defect monitoring device, system and detection method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110514976A (en) * | 2019-09-29 | 2019-11-29 | 国网江苏省电力有限公司 | A kind of GIS insulation defect monitoring device, system and detection method |
| CN110514976B (en) * | 2019-09-29 | 2024-02-13 | 国网江苏省电力有限公司 | GIS insulation defect monitoring device, system and detection method |
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