CN115453284A - Main transformer online chromatographic detection discharge fault simulation device and method - Google Patents
Main transformer online chromatographic detection discharge fault simulation device and method Download PDFInfo
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Abstract
The invention relates to a main transformer online chromatographic detection discharge fault simulation device and method. The device comprises: simulating the proportion of the main transformer size, namely a transparent shell and transformer oil; transparent casing is by transparent organic glass board preparation, transparent casing bottom has the directive wheel, transformer oil fills and annotates in transparent casing, the tank filler valve is installed at transparent casing top, the upper portion oil sample passageway is installed respectively to upper, middle, lower position on one side of transparent casing, middle part oil sample passageway and lower part oil sample passageway are connected with the four-way switch valve of online chromatograph respectively, the inside of transparent casing is fixed mounting respectively has upper, middle, three adjustable discharge gap down and upper, middle, three high-pressure little electric quantity discharge fixed gap down. The invention can visually observe various discharging conditions in the simulated oil immersed transformer to obtain various discharging conditions in the real oil immersed transformer.
Description
Technical Field
The invention belongs to the technical field of detecting characteristic gas dissolved in transformer oil by a main transformer online chromatographic instrument of a power system, and particularly relates to a main transformer online chromatographic detection discharge fault simulation device and method.
Background
When the oil-filled main transformer runs, a discharge fault sometimes occurs in the main transformer, and when the discharge fault occurs, partial discharge and flashover discharge of low-energy discharge, spark discharge of medium-energy density, or arc discharge of high energy, and high-voltage micro-electric discharge of early latency and the like are respectively generated at the discharge fault according to different discharge energy densities; the discharge energy of the discharge faults cracks transformer oil around the fault position, acetylene, ethylene, methane, hydrogen, carbon monoxide, carbon dioxide gas and the like with different component proportions are cracked according to different discharge energies, the characteristic gases are dissolved in the transformer oil, a main transformer in normal operation needs high energy to generate the characteristic gases, particularly acetylene in a three-bond combination form, when the discharge faults occur, the characteristic gases greatly increase, the total amount of the acetylene with the three-bond generated by cracking is increased along with the increase of the discharge energy and the discharge time, the types and the degrees of the discharge faults of the main transformer can be detected through the detection of the contents of the components of the characteristic gases dissolved in the transformer oil by a chromatographic instrument, and compared with historical data, the types and the degrees of the discharge faults of the main transformer can be detected, and the occurrence positions of the discharge faults can be roughly judged through the difference of the contents of the characteristic gases detected at the upper sampling detection parts, the middle sampling detection parts and the lower sampling detection parts of the main transformer. The traditional online chromatographic instrument for the main transformer cannot observe the internal discharge condition of the main transformer directly, and due to the defects of self performance and technology, in the online detection process, certain inaccuracy and error regions exist in analysis and diagnosis of test data, especially, early latency micro-electric discharge fault lags, so that the actual condition is difficult to judge accurately sometimes, the condition that the conventional online chromatographic instrument for the main transformer is frequently used for false alarm or excessive reaction occurs, and the technical operation training of professionals is not visual enough.
Disclosure of Invention
The invention aims to provide a main transformer online chromatographic detection discharge fault simulation device and method, which can visually observe various discharge conditions inside a simulated oil immersed transformer and obtain various discharge conditions inside the real oil immersed transformer.
In order to achieve the purpose, the technical scheme of the invention is as follows: a main transformer online chromatographic detection discharge fault simulation device comprises: simulating the proportion of the main transformer size, namely a transparent shell and transformer oil; transparent casing is by transparent organic glass board preparation, transparent casing bottom has the directive wheel, transformer oil fills and annotates in transparent casing, the tank filler valve is installed at transparent casing top, the upper portion oil sample passageway is installed respectively to upper, middle, lower position on one side of transparent casing, middle part oil sample passageway and lower part oil sample passageway are connected with the four-way switch valve of online chromatograph respectively, the inside of transparent casing is fixed mounting respectively has upper, middle, three adjustable discharge gap down and upper, middle, three high-pressure little electric quantity discharge fixed gap down.
The invention also provides a main transformer online chromatographic detection discharge fault simulation method based on the main transformer online chromatographic detection discharge fault simulation device, which comprises the following steps:
(1) The control module is switched to preset programming to output high-voltage and current control values according to the real main-to-low discharge fault energy proportion;
1) Adjusting the remote control charging driving gear motor to adjust the distance from the adjustable discharge gap movable electrode to the low-energy discharge gap;
2) Closing the upper high-voltage switch;
3) Starting the high-voltage generator, and stopping boosting when the control module automatically controls the high-voltage generator to slowly boost voltage from zero to a discharge gap to start continuous low-energy discharge;
4) When the continuous low-energy discharge reaches the first set time of the time control module, the control module automatically switches off the upper high-voltage switch, the high-voltage generator is shut down, the discharge gap stops discharging, the whole discharge process is transparent and visible, the discharge energy cracks transformer oil around the discharge gap, and the generated characteristic fault gas is dissolved in the transformer oil and is diffused in the transformer oil;
5) When the second set time is reached, automatically starting the online chromatograph, automatically switching the four-way switching valve to respectively sample the upper oil sampling channel, the middle oil sampling channel and the lower oil sampling channel, and respectively carrying out detection tests by the online chromatograph;
6) According to the concentration value of each discharge fault characteristic gas component detected by the online chromatographic test, the control module automatically and continuously carries out fault analysis and diagnosis according to preset analysis and diagnosis;
7) Performing chromatographic analysis on the content of dissolved characteristic gas components in oil according to oil samples of an upper oil sample taking channel, a middle oil sample taking channel and a lower oil sample taking channel of an online chromatograph, wherein the oil sample taking channel with the highest concentration is the position where the simulated discharge fault is located;
8) Similarly, the simulation online chromatographic detection analysis of the medium-energy discharge fault and the high-energy discharge fault is also carried out according to 1) -7);
9) When the discharge gap is enlarged, the output voltage of the high-voltage generator is improved, and when the discharge phenomenon is generated in the discharge gap, the discharge distance is lengthened and the discharge voltage is increased, which is equivalent to the simulation of increasing the severity of the discharge fault, so that the quantity of the characteristic gas of the fault generated at the discharge fault position can be rapidly and greatly increased, and the simulation condition that the main transformer generates the serious discharge fault and the gas generation rate of the characteristic gas is rapidly increased is simulated;
(2) Carrying out a micro-electricity high-voltage discharge test process simulating early latency of the upper part of a main transformer:
the control module is switched to a preset programmed main transformer micro-electricity discharge fault program, an upper piezoelectric ceramic micro-electricity high-voltage generator is started, a fixed high-voltage micro-electricity discharge gap on the upper portion is discharged, transformer oil around the upper portion micro-electricity discharge gap is cracked under the action of discharge energy, micro characteristic gas generated by cracking is dissolved in the transformer oil, sampling and detection are respectively carried out through an upper oil sampling channel, a middle oil sampling channel and a lower oil sampling channel through an online chromatograph arranged outside a transparent shell, the online chromatograph detects the content of each component of the characteristic gas dissolved in the transformer oil, and through analysis of the content proportion of each component of the characteristic gas, early latent micro-electricity discharge faults and the general discharge positions of the main transformer can be judged in a simulation mode, so that the early latent micro-electricity discharge faults and the general discharge positions of the main transformer are matched with actual discharge conditions in a comparison mode, accurate comparison diagnosis and analysis can be further carried out when the real invisible micro-electricity discharge faults occur in the main transformer, or professional oil and gas supervision personnel of a power system can carry out professional simulation of fault detection and fault analysis of fault detection of the dissolved fault detection in the early latent micro-electricity discharge faults in the early latent micro-electricity discharge oil.
Compared with the prior art, the invention has the following beneficial effects:
(1) Simulating the size of a main transformer, and designing and manufacturing according to the proportion, wherein the main transformer comprises: the device comprises a transparent shell, an adjustable discharge gap, oil sample taking switching channels at different positions and the like, can visually observe various discharge conditions in the simulation oil immersed transformer, is light and movable, and can be conveniently taken to a main transformer on-line chromatographic detection instrument or a training cabinet needing comparison and detection;
(2) According to the main transformer discharge fault form, a high-voltage discharge generating device is designed, discharge of various simulated density energies is carried out through an adjustable discharge gap, the real situation of transformer oil around a main transformer discharge fault cracking fault point is simulated, main transformer online chromatographic detection in actual operation can be compared and analyzed, and the accuracy of online chromatographic detection and the reliability of fault analysis and judgment are improved;
(3) The piezoelectric ceramic micro-electricity high-voltage discharge integrated generating device is designed, the piezoelectric ceramic is combined with a discharge gap for simulating micro-electricity discharge faults in the main transformer, high-voltage micro-electricity discharge is carried out through the micro-electricity discharge gap, the real situation of transformer oil around a high-voltage micro-electricity cracking fault point of the early latent discharge faults of the main transformer is simulated, the on-line chromatographic detection of the main transformer in actual operation can be compared and analyzed in time, and the accuracy of the on-line chromatographic detection and the reliability of analysis and judgment of the early latent faults are improved;
(4) The method has important significance for the analysis of the discharge faults occurring in the main transformer, particularly the accurate analysis and diagnosis of the serious discharge faults and early latent micro-electric discharge faults, and the technical training of professional personnel and the like by truly simulating the discharge fault conditions of various energy densities occurring in the main transformer, detecting the matching relationship between the discharge faults of different degrees and the content of dissolved characteristic gas components in oil, increasing the rate and the like.
Drawings
FIG. 1 is a portable main transformer online chromatographic detection discharge fault simulation device;
FIG. 2 is a transformer oil injected into a portable main transformer online chromatographic detection discharge fault simulation device;
FIG. 3 is a graph of an adjustable high voltage discharge gap elongated discharge gap discharge;
FIG. 4 is a graph of an adjustable high voltage discharge gap shortening discharge gap discharge event;
FIG. 5 is a micro-current high-voltage fixed discharge gap discharge case;
FIG. 6 is a schematic block diagram of a control module control routine;
in the figure: 1-a transparent shell; 2-a refueling valve; 3-upper oil sampling channel; 4-middle oil sampling channel; 5-lower oil sampling channel; 6-four-way switching valve; 7-on-line chromatograph; 8-a high voltage generator; 9-high voltage bus; 10-upper high voltage switch; 11-middle high voltage switch; 12-lower high voltage switch; 13-an insulating sheath; 14-transformer oil; 15-discharge gap high voltage electrode discharge end; 16-discharge gap ground electrode terminal; 17-a grounded sheath wire; 18-an insulating support; 19-upper piezoelectric ceramic micro-electricity high voltage generator; 20-middle piezoelectric ceramic micro-electricity high-voltage generator; 21-a lower piezoelectric ceramic micro-electricity high-voltage generator; 22-adjustable discharge gap fixed electrode; 23-adjustable discharge gap movable electrode; 24-an insulating rack portion of the adjustable discharge gap movable electrode; 25-a micro drive gear motor; 26-a ground line; 27-a ground grid; 28-wheels.
Detailed Description
The technical scheme of the invention is specifically explained below by combining the attached drawings 1-6.
The invention discloses a main transformer online chromatographic detection discharge fault simulation device, which comprises: simulating the proportion of the size of a main transformer, namely a transparent shell 1 and transformer oil 14; transparent housing is by transparent organic glass board preparation, transparent housing bottom has directive wheel 28, transformer oil fills and annotates in transparent housing, refuel valve 2 is installed at the transparent housing top, on one side of transparent housing, in, lower position installs upper portion oil sample passageway 3 respectively, middle part oil sample passageway 4 and lower part oil sample passageway 5, be connected with four-way switch valve 6 of online chromatograph 7 respectively, transparent housing's inside respectively fixed mounting have last, in, three adjustable discharge gap and go up down, in, three high-voltage micro-electricity volume discharge fixed gap down.
The invention discloses a main transformer online chromatographic detection discharge fault simulation device, which further comprises a high-voltage discharge device and a remote control driving device, wherein the high-voltage discharge device comprises: the high-voltage generator 8, the high-voltage bus 9, the upper, middle and lower three high-voltage switches (10, 11 and 12) for connecting the high-voltage conductor and three adjustable discharge gaps, the insulating support 18, the insulating sheath 13 and the grounding wire 26; one end of a high-voltage bus is connected with a high-voltage generator, each outgoing line of the high-voltage bus is respectively and correspondingly provided with an upper high-voltage switch, a middle high-voltage switch and a lower high-voltage switch, the upper high-voltage switch, the middle high-voltage switch and the lower high-voltage switch pass through respective high-voltage leads and insulating sheaths and pass through a transparent shell and are respectively connected with three adjustable discharge gap fixed ends arranged in the transparent shell, the high-voltage generator can steplessly adjust and output high-voltage and current to adjustable discharge gaps, each adjustable discharge gap is respectively supported and fixedly arranged at corresponding upper, middle and lower positions in the transparent shell by respective insulating supporting parts, each adjustable discharge gap consists of a fixed electrode and a movable electrode, the fixed electrodes are respectively connected with the corresponding high-voltage leads, the movable electrodes are directly grounded through grounding wires, each grounding wire is protected by a respective insulating grounding wire sheath 17 and passes through the transparent shell to be connected with a grounding grid 27, a remote control driving device comprises a remote control charging driving gear motor and a gear, and is used for driving the movement of the movable electrodes in the adjustable discharge gaps, and all metal parts except the discharge electrodes are subjected to insulation shielding treatment so as to reduce suspension discharge.
The fixed electrode is formed by connecting round copper-tungsten alloy wire teeth or needle tip wire teeth, the movable electrode is divided into two sections, one section is formed by connecting round copper-tungsten alloy wire teeth or is formed by connecting round copper-tungsten alloy wire teeth, the other section is formed by insulating material, a rack is arranged at the lower part, and a gear is driven by a remote control driving motor (namely a micro driving gear motor 25) to drive the rack to move so as to adjust the discharge gap distance between the movable electrode and the fixed electrode.
The invention discloses a main transformer online chromatographic detection discharge fault simulation device, which further comprises an upper piezoelectric ceramic micro-electricity high-voltage discharge device, a middle piezoelectric ceramic micro-electricity high-voltage discharge device and a lower piezoelectric ceramic micro-electricity high-voltage discharge device, wherein each piezoelectric ceramic micro-electricity high-voltage discharge device comprises: but piezoceramics little electric quantity high voltage generator, the little electric quantity fixed clearance of high pressure, and insulating support piece, the earth connection, but piezoceramics little electric quantity high voltage generator remote control operation, and combine as an organic whole with the little electric quantity high pressure discharge clearance of high pressure, it is fixed through insulating support piece, the output of piezoceramics little electric quantity high voltage generator is connected in the high-voltage electrode side of the little electric quantity fixed clearance of high pressure, the earthing pole of the little electric quantity fixed clearance of high pressure discharges by insulating cover protection, pass transparent casing and be connected with the earth mat.
The device of the invention also comprises an online chromatographic detection device, which comprises: the online chromatograph comprises an online chromatographic detector, a four-way switching valve, an upper sampling channel, a middle sampling channel and a lower sampling channel, wherein the online chromatograph can respectively and independently carry out sampling online analysis on the upper sampling channel port, the middle sampling channel port and the lower sampling channel port through the four-way switching valve, and judges the type and the general discharge position of a discharge fault through the comparison of the characteristic gas concentrations in an upper oil sample, a middle oil sample and a lower oil sample, so that the online chromatographic detector is matched with the actual discharge situation in a transparent simulation main transformer shell, further accurate comparison diagnosis and analysis are carried out when the discharge fault occurs in a real invisible main transformer, and the online chromatographic detector can also be used as professional simulation training for carrying out chromatographic detection fault analysis on dissolved gas in oil for oil gas supervision professionals of an electric power system.
The device is also provided with a time program module, and by presetting calibration and back-stepping of time for diffusing characteristic gas generated by various known discharge capacity tests and different discharge fault points to corresponding sampling ports, the device can truly simulate discharge faults with various energy densities in the main transformer and diffusion time of dissolved characteristic gas components in oil, and design, program and solidify the discharge faults and the diffusion time in the time program module, thereby having positive significance for fault analysis and diagnosis of gas production rate, diffusion time and the like of discharge faults with various degrees in the main transformer, on-line chromatographic simulation training of professionals and the like.
The device also comprises a control module, wherein the control module is preset with a program for simulating the proportion of high-voltage, medium-voltage and low-voltage discharge fault electric quantity of a main transformer and high-voltage micro-discharge energy of early latent fault, designs programmed output high-voltage and current control values of different discharge electric quantities, sets a parameter program for a discharge electrode gap, is also preset with an analysis and diagnosis program for programming the component content ratio of characteristic fault gas generated by various simulated discharge fault levels of a main transformer, and the like, the output end of the control module is respectively and electrically connected with a high-voltage generator, high-voltage switches, a remote control charging driving gear motor, a piezoelectric ceramic micro-electric quantity high-voltage generator, and the input end of a four-way valve of a portable main transformer online chromatographic detector and the like, and is controlled by the preset programs, the input end of the control module is electrically connected with the output end of the time program module, the time program module is preset with a first setting time for controlling the continuous discharge time of discharge gap discharge, and a second setting time for starting online chromatographic test sampling analysis after continuous discharge stopping and then the online chromatographic detector, and the second time is mainly set to meet the characteristic gas generated by cracking of transformer oil around the discharge fault, and is dissolved in the transformer oil and diffused to a corresponding sampling channel.
The invention also provides a main transformer online chromatographic detection discharge fault simulation method based on the main transformer online chromatographic detection discharge fault simulation device, which comprises the following steps:
(1) The control module is switched to preset and programmed with discharge fault energy proportion according to the real main variable, and high voltage and current control values are output;
1) Adjusting the remote control charging driving gear motor to adjust the distance from the adjustable discharge gap movable electrode to the low-energy discharge gap;
2) Closing an upper high-voltage switch;
3) Starting the high-voltage generator, and stopping boosting when the control module automatically controls the high-voltage generator to slowly boost voltage from zero to a discharge gap to start continuous low-energy discharge;
4) When the continuous low-energy discharge reaches the first set time of the time control module, the control module automatically switches off the upper high-voltage switch, the high-voltage generator is turned off, the discharge gap stops discharging, the whole discharge process is transparent and visible, the discharge energy cracks transformer oil around the discharge gap, and the generated characteristic fault gas is dissolved in the transformer oil and is diffused in the transformer oil;
5) When the second set time is reached, automatically starting the online chromatograph, automatically switching the four-way switching valve to sample the upper oil sampling channel, the middle oil sampling channel and the lower oil sampling channel respectively, and performing detection tests by the online chromatograph respectively;
6) According to the concentration value of each discharge fault characteristic gas component detected by the online chromatographic test, the control module automatically and continuously carries out fault analysis and diagnosis according to preset analysis and diagnosis;
7) Performing chromatographic analysis on the content of dissolved characteristic gas components in oil according to oil samples of an upper oil sample taking channel, a middle oil sample taking channel and a lower oil sample taking channel of an online chromatograph, wherein the oil sample taking channel with the highest concentration is the position where the simulated discharge fault is located;
8) Similarly, the simulation on-line chromatographic detection analysis of the medium-energy discharge fault and the high-energy discharge fault is also carried out according to 1) -7);
9) When the discharge gap is enlarged, the output voltage of the high-voltage generator is improved, and when the discharge phenomenon is generated in the discharge gap, the discharge distance is lengthened and the discharge voltage is increased, which is equivalent to the simulation of increasing the severity of the discharge fault, so that the quantity of the characteristic gas of the fault generated at the discharge fault position can be rapidly and greatly increased, and the simulation condition that the main transformer generates the serious discharge fault and the gas generation rate of the characteristic gas is rapidly increased is simulated;
(2) Carrying out a micro-electricity high-voltage discharge test process simulating early latency of the upper part of a main transformer:
the control module is switched to a preset programmed main transformer micro-electricity discharge fault program, an upper piezoelectric ceramic micro-electricity high-voltage generator is started, a fixed high-voltage micro-electricity discharge gap on the upper portion is discharged, transformer oil around the upper portion micro-electricity discharge gap is cracked under the action of discharge energy, micro characteristic gas generated by cracking is dissolved in the transformer oil, sampling and detection are respectively carried out through an upper oil sampling channel, a middle oil sampling channel and a lower oil sampling channel through an online chromatograph arranged outside a transparent shell, the online chromatograph detects the content of each component of the characteristic gas dissolved in the transformer oil, and through analysis of the content proportion of each component of the characteristic gas, early latent micro-electricity discharge faults and the general discharge positions of the main transformer can be judged in a simulation mode, so that the early latent micro-electricity discharge faults and the general discharge positions of the main transformer are matched with actual discharge conditions in a comparison mode, accurate comparison diagnosis and analysis can be further carried out when the real invisible micro-electricity discharge faults occur in the main transformer, or professional oil and gas supervision personnel of a power system can carry out professional simulation of fault detection and fault analysis of fault detection of the dissolved fault detection in the early latent micro-electricity discharge faults in the early latent micro-electricity discharge oil.
The device of the invention has the following operation modes:
1. when the discharge test simulating the main low energy, the middle energy and the high energy is carried out, the distance between the movable electrode of the discharge gap and the set gap is remotely adjusted, if the discharge test simulating the high energy is carried out, the discharge gap is adjusted to a high energy discharge set value, then the high voltage generator and the high voltage switch correspondingly connected with the high voltage generator are started, the output voltage of the high voltage generator is increased to the set value from zero, at the moment, the high voltage current output by the high voltage generator through the high voltage switch flows to the connected discharge gap, and the high voltage current can be correspondingly generated in the discharge gap according to the set value: the method comprises the steps of carrying out low-energy, medium-energy or high-energy discharge electric quantity, cracking transformer oil around a discharge gap under the action of discharge energy, dissolving characteristic gas generated by cracking in the transformer oil, respectively carrying out sampling detection through an upper sampling channel, a middle sampling channel and a lower sampling channel through an online chromatograph installed outside a transparent shell, detecting the content of each component of the characteristic gas dissolved in the transformer oil through the online chromatograph, and analyzing the content proportion of each component of the characteristic gas to judge the type and the general discharge position of a discharge fault so as to be matched with the actual discharge condition in a comparison manner, further carrying out accurate comparison diagnosis and analysis when the discharge fault occurs in a real invisible main transformer, and carrying out professional simulation training of chromatographic detection and fault analysis of the characteristic gas dissolved in the transformer oil for oil supervision professionals of a power system.
2. When a micro-electricity high-voltage discharge test simulating early latency of a main transformer is carried out, a corresponding piezoelectric ceramic micro-electricity high-voltage generator is started in a remote control mode, a corresponding high-voltage micro-electricity discharge gap is discharged, at the moment, transformer oil around the micro-electricity discharge gap is cracked under the action of discharge energy, characteristic gas generated by cracking is dissolved in the transformer oil, through an online chromatograph arranged outside a transparent shell, through an upper sampling channel, a middle sampling channel and a lower sampling channel, the content of each component of the characteristic gas dissolved in the transformer oil is detected through the online chromatograph, through analysis of the content proportion of each component of the characteristic gas, the early latency micro-electricity discharge fault and the general discharge position of the main transformer can be judged in a simulation mode, so that the early latency micro-electricity discharge fault and the general discharge position of the main transformer are matched with the actual micro-electricity discharge condition in a comparison mode, accurate comparison diagnosis and analysis can be carried out when the early latency discharge fault occurs in the main transformer, and professional chromatographic detection and fault analysis can be carried out on early latency fault detection and professional training of oil and gas supervision personnel of an electric power system.
In the method, the simulation of the low-energy discharge fault on the upper part of the main transformer is taken as an example, and the method specifically comprises the following steps:
(1) The control module is switched to preset programming to output high voltage and current control values according to the real main variable low discharge fault energy proportion.
1) Adjusting the upper discharge gap micro-driving gear motor 25, and adjusting the distance from the adjustable discharge gap movable electrode 23 to the low energy discharge gaps 15 and 16;
2) Closing the upper high-voltage switch 10;
3) Starting the high-voltage generator 8, and automatically controlling the high-voltage generator 8 to slowly increase the voltage from zero until the discharging gaps 15 and 16 start to continuously discharge with low energy and stop increasing the voltage by the control module;
4) When the continuous low-energy discharge reaches the first set time of the time control module, the control module automatically switches off the upper high-voltage switch 10, turns off the high-voltage generator 8, stops the discharge of the discharge gaps 15 and 16, ensures that the whole discharge process is transparent and visible, cracks the transformer oil 14 around the discharge gaps 15 and 16 by the discharge energy, and generates characteristic fault gas which is dissolved in the transformer oil 14 and is diffused in the transformer oil 14;
5) When the second set time is reached, the online chromatographic instrument 7 is automatically started, the four-way sampling valve is automatically switched to respectively sample the upper part 3, the middle part 4 and the lower part sampling channel 5, and the online chromatographic instrument 7 respectively performs detection tests;
6) According to the concentration value of each discharge fault characteristic gas component detected by the on-line chromatographic test 7, the control module automatically and continuously carries out fault analysis and diagnosis according to preset analysis and diagnosis;
7) Performing chromatographic analysis of the content of dissolved characteristic gas components in oil according to the oil samples of the upper sampling channel, the middle sampling channel and the lower sampling channel by using the online chromatograph 7, wherein the oil sampling channel with the highest concentration is the position where the simulated discharge fault is located;
8) Similarly, the simulated online chromatographic detection and analysis of the medium-energy discharge fault and the high-energy discharge fault are also carried out according to the method;
9) When the discharge gap is enlarged, the output voltage of the high voltage generator 8 is increased, and the discharge phenomenon is generated in the discharge gaps 15 and 16, because the discharge distance is lengthened and the discharge voltage is increased, which is equivalent to simulating and increasing the severity of the discharge fault, the quantity of the characteristic gas of the fault generated at the discharge fault position can be rapidly and greatly increased, and the simulation condition that the main transformer generates the serious discharge fault and the gas generation rate of the characteristic gas is rapidly increased is simulated.
(2) Carrying out a micro-electric high-voltage discharge test process simulating early latency of the upper part of a main transformer:
the control module is switched to a preset programmed main transformer micro-electricity discharge fault program, an upper piezoelectric ceramic micro-electricity high-voltage generator 19 is started, the upper fixed high-voltage micro-electricity discharge gaps 15 and 16 are discharged, at the moment, transformer oil around the upper micro-electricity discharge gaps 15 and 16 is cracked under the action of discharge energy, micro characteristic gas generated by cracking is dissolved in the transformer oil 14, through an online chromatograph arranged outside a transparent shell, through an upper sampling channel, a middle sampling channel and a lower sampling channel, the content of each component of characteristic gas dissolved in the transformer oil 14 is detected through an online chromatographic instrument 7, through analysis of the content proportion of each component of the characteristic gas, early latent micro-electricity discharge faults and the general discharge position of the main transformer can be judged in a simulation mode, the early latent micro-electricity discharge faults and the general discharge positions of the main transformer are compared and matched with actual discharge conditions, accurate comparison diagnosis and analysis are further carried out when the micro-electricity discharge faults occur inside the main transformer invisibly, and professional personnel for oil gas supervision of an electric power system can also carry out professional simulation training of fault detection and fault analysis of dissolved fault detection on the dissolved in the early latent micro-electricity discharge faults in the early stage latent micro-electricity discharge faults of the transformer.
The above are preferred embodiments of the present invention, and all changes made according to the technical solutions of the present invention that produce functional effects do not exceed the scope of the technical solutions of the present invention belong to the protection scope of the present invention.
Claims (10)
1. The utility model provides a main online chromatography of becoming detects discharge fault analogue means which characterized in that includes: simulating the proportion of the main transformer size, namely a transparent shell and transformer oil; transparent casing is by transparent organic glass board preparation, transparent casing bottom has the directive wheel, transformer oil fills and annotates in transparent casing, the tank filler valve is installed at transparent casing top, the upper portion oil sample passageway is installed respectively to upper, middle, lower position on one side of transparent casing, middle part oil sample passageway and lower part oil sample passageway are connected with the four-way switch valve of online chromatograph respectively, the inside of transparent casing is fixed mounting respectively has upper, middle, three adjustable discharge gap down and upper, middle, three high-pressure little electric quantity discharge fixed gap down.
2. The main transformer online chromatographic detection discharge fault simulation device according to claim 1, further comprising a high voltage discharge device and a remote control driving device, wherein the high voltage discharge device comprises: the high-voltage generator, the high-voltage bus, the upper, middle and lower three high-voltage switches which are connected with the high-voltage lead and three adjustable discharge gaps, the insulating support piece, the insulating sheath and the grounding wire; one end of a high-voltage bus is connected with a high-voltage generator, each outgoing line of the high-voltage bus is respectively and correspondingly provided with an upper high-voltage switch, a middle high-voltage switch and a lower high-voltage switch, the upper high-voltage switch, the middle high-voltage switch and the lower high-voltage switch penetrate through a transparent shell and are respectively connected with three adjustable discharge gap fixed ends arranged in the transparent shell, the high-voltage generator can steplessly adjust and output high-voltage and current to adjustable discharge gaps, each adjustable discharge gap is respectively supported and fixedly arranged at the corresponding upper position, the middle position and the lower position in the transparent shell by a respective insulating support piece, each adjustable discharge gap consists of a fixed electrode and a movable electrode, the fixed electrodes are respectively connected with the corresponding high-voltage leads, the movable electrodes are directly grounded through grounding wires, each grounding wire is protected by a respective insulating sheath and is connected with a grounding network after penetrating through the transparent shell, a remote control driving device comprises a remote control charging driving gear motor and a gear, and is used for driving the movable electrodes in the adjustable discharge gaps to move, and all metal components except the discharge electrodes are subjected to insulating shielding treatment so as to reduce suspension discharge.
3. The simulation apparatus for online chromatographic detection of discharge fault of a main transformer according to claim 2, wherein the fixed electrode is made of stainless steel with cylindrical rod, the ends of the rod are connected by spherical copper tungsten alloy threads or needle tip threads, the movable electrode is divided into two sections, one section is made of stainless steel with cylindrical rod, the ends of the rod are connected by spherical copper tungsten alloy threads, the other section is made of insulating material, the lower part of the rod is provided with a rack, and a gear driven by a remote control driving motor drives the rack to move so as to adjust the discharge gap distance between the movable electrode and the fixed electrode.
4. The on-line chromatographic detection discharge fault simulation device of a main transformer according to claim 1, further comprising an upper, a middle and a lower piezoelectric ceramic micro-electric high-voltage discharge device, each piezoelectric ceramic micro-electric high-voltage discharge device comprising: but piezoceramics little electric quantity high voltage generator, the little electric quantity fixed clearance of high pressure, and insulating support piece, the earth connection, but piezoceramics little electric quantity high voltage generator remote control operation, and combine as an organic whole with the little electric quantity high pressure discharge clearance of high pressure, it is fixed through insulating support piece, the output of piezoceramics little electric quantity high voltage generator is connected in the high-voltage electrode side of the little electric quantity fixed clearance of high pressure, the earthing pole of the little electric quantity fixed clearance of high pressure discharges by insulating cover protection, pass transparent casing and be connected with the earth mat.
5. The main transformer online chromatographic detection discharge fault simulation device according to claim 1, wherein the online chromatograph separately performs sampling online analysis on the upper, middle and lower oil sampling channel ports through a four-way switching valve, and determines the type and the general discharge position of the discharge fault through comparison of the characteristic gas concentrations in the upper, middle and lower oil samples, so as to compare and match with the actual discharge situation in the transparent shell, and further perform accurate comparative diagnosis and analysis when the discharge fault occurs inside the real invisible main transformer, or can be used as a professional simulation training for performing chromatographic detection fault analysis on dissolved gas in oil for oil gas supervision professionals in the power system.
6. The main transformer online chromatographic detection discharge fault simulation device as claimed in claim 2, wherein a time program module is further provided, and the time program module is designed and programmed to actually simulate the discharge fault with various energy densities occurring inside the main transformer and the diffusion time of the dissolved characteristic gas component in the oil by presetting various known discharge capacity tests and calibration and reverse thrust of the diffusion time of the characteristic gas generated by different discharge fault points to the corresponding sampling port.
7. The simulation apparatus for detecting discharge fault of on-line chromatograph of main transformer according to claim 6, further comprising a control module, wherein the control module is programmed with a ratio of simulated high, medium and low power discharge fault electric quantity and early latent fault high-voltage micro-discharge energy, and is programmed with output high-voltage and current control values of different programmed discharge electric quantities, and is programmed with parameter programs for setting discharge electrode gap, and is programmed with analysis and diagnosis programs for generating characteristic fault gas component content ratio for various simulated discharge fault levels of the main transformer, and the output end of the control module is electrically connected to the high-voltage generator, each high-voltage switch, the remote-control charging driving gear motor, and the portable main transformer on-line chromatograph, and is controlled by the preset programs, the input end of the control module is electrically connected to the output end of the time program module, and the time program module is preset with a first setting time including controlling discharge gap continuous discharge time, and a second setting time including on-line chromatograph sampling analysis after stopping continuous discharge until the on-line chromatograph starts, and the second setting time mainly satisfies characteristic gas generated by cracking of transformer oil around the discharge fault, and is dissolved in the transformer, and diffused to the corresponding sampling oil channel.
8. The online chromatographic detection discharge fault simulation device for the main transformer as claimed in claim 1, wherein during the discharge test simulating the main transformer with low energy, medium energy and high energy, the movable electrode of the discharge gap is remotely adjusted to a set gap distance, and during the discharge test simulating the high energy, the movable electrode of the discharge gap is adjusted to a high energy discharge set value, then the high voltage generator and the correspondingly connected high voltage switch are turned on, the output voltage of the high voltage generator is increased to a set value from zero, and at the moment, the high voltage current output by the high voltage generator through the high voltage switch flows to the connected discharge gap, and according to the set value, the discharge gap can be correspondingly generated: the method comprises the steps of carrying out low-energy, medium-energy or high-energy discharge electric quantity, cracking transformer oil around a discharge gap under the action of discharge energy, dissolving characteristic gas generated by cracking in the transformer oil, respectively carrying out sampling detection through upper, middle and lower oil sampling channels through an online chromatograph arranged outside a transparent shell, detecting the content of each component of the characteristic gas dissolved in the transformer oil by the online chromatograph, and judging the type and the general discharge position of a discharge fault through analysis of the content proportion of each component of the characteristic gas, so that the discharge fault is matched with an actual discharge condition in a comparison manner, and further carrying out accurate comparison diagnosis and analysis when the discharge fault occurs in a real invisible main transformer or carrying out professional simulation training of chromatographic detection and fault analysis of the characteristic gas in the transformer oil for oil supervision professionals of an electric power system.
9. The simulation apparatus for main transformer online chromatographic detection discharge fault according to claim 1, wherein when a micro-electrical high-voltage discharge test simulating the early latent fault of a main transformer is performed, a corresponding piezoelectric ceramic micro-electrical high-voltage generator is turned on in a remote control manner to discharge a corresponding high-voltage micro-electrical discharge gap, transformer oil around the micro-electrical discharge gap is cracked under the action of discharge energy, characteristic gases generated by the cracking are dissolved in the transformer oil, an online chromatograph installed outside a transparent housing is used for sampling and detecting the upper portion, the middle portion and the lower portion through oil sampling channels, the online chromatograph is used for detecting the content of each component of the characteristic gases dissolved in the transformer oil, and the main transformer early latent micro-electrical discharge fault and the general discharge position are determined by simulation through analysis of the content proportion of each component of the characteristic gases, so as to be matched with the actual micro-electrical discharge condition, and further, a professional simulation for chromatographic detection fault analysis of the early latent fault characteristic gases dissolved in the transformer oil which is truly invisible to be performed by oil gas professionals in the electric power system.
10. A main transformer online chromatographic detection discharge fault simulation method based on the main transformer online chromatographic detection discharge fault simulation device of claim 7, characterized by comprising the following steps:
(1) The control module is switched to preset programming to output high-voltage and current control values according to the real main-to-low discharge fault energy proportion;
1) Adjusting the remote control charging driving gear motor to adjust the distance from the adjustable discharge gap movable electrode to the low-energy discharge gap;
2) Closing the upper high-voltage switch;
3) Starting the high-voltage generator, and stopping boosting when the control module automatically controls the high-voltage generator to slowly boost voltage from zero to a discharge gap to start continuous low-energy discharge;
4) When the continuous low-energy discharge reaches the first set time of the time control module, the control module automatically switches off the upper high-voltage switch, the high-voltage generator is turned off, the discharge gap stops discharging, the whole discharge process is transparent and visible, the discharge energy cracks transformer oil around the discharge gap, and the generated characteristic fault gas is dissolved in the transformer oil and is diffused in the transformer oil;
5) When the second set time is reached, automatically starting the online chromatograph, automatically switching the four-way switching valve to sample the upper oil sampling channel, the middle oil sampling channel and the lower oil sampling channel respectively, and performing detection tests by the online chromatograph respectively;
6) According to the concentration value of each discharge fault characteristic gas component detected by the online chromatographic test, the control module automatically and continuously carries out fault analysis and diagnosis according to preset analysis and diagnosis;
7) Performing chromatographic analysis on the content of dissolved characteristic gas components in oil according to oil samples of an upper oil sample taking channel, a middle oil sample taking channel and a lower oil sample taking channel of an online chromatograph, wherein the oil sample taking channel with the highest concentration is the position where the simulated discharge fault is located;
8) Similarly, the simulation on-line chromatographic detection analysis of the medium-energy discharge fault and the high-energy discharge fault is also carried out according to 1) -7);
9) When the discharge gap is enlarged, the output voltage of the high-voltage generator is improved, and when the discharge phenomenon is generated in the discharge gap, the discharge distance is lengthened and the discharge voltage is increased, which is equivalent to the simulation of increasing the severity of the discharge fault, so that the quantity of the characteristic gas of the fault generated at the discharge fault position can be rapidly and greatly increased, and the simulation condition that the main transformer generates the serious discharge fault and the gas generation rate of the characteristic gas is rapidly increased is simulated;
(2) Carrying out a micro-electric high-voltage discharge test process simulating early latency of the upper part of a main transformer:
the control module is switched to a preset programmed main transformer micro-electricity discharge fault program, an upper piezoelectric ceramic micro-electricity high-voltage generator is started to discharge an upper fixed high-voltage micro-electricity discharge gap, transformer oil around the upper micro-electricity discharge gap is cracked under the action of discharge energy, micro characteristic gas generated by cracking is dissolved in the transformer oil, the transformer oil is sampled and detected through an upper oil sampling channel, a middle oil sampling channel and a lower oil sampling channel respectively through an online chromatograph arranged outside a transparent shell, the online chromatograph detects the content of each component of the characteristic gas dissolved in the transformer oil, and the early latent micro-electricity discharge fault and the large discharge position of the main transformer can be judged in a simulation mode through analysis of the content proportion of each component of the characteristic gas, so that the early latent micro-electricity discharge fault and the large discharge position are matched with the actual discharge condition in a comparison mode, accurate comparison diagnosis and analysis are further carried out when the micro-electricity discharge fault occurs in the main transformer, or professional personnel for monitoring oil and gas of a power system can carry out professional simulation of fault detection and fault analysis of dissolved fault detection in the early latent micro-electricity discharge fault in the early micro-discharge oil of the transformer.
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