CN113503909A

CN113503909A - Extra-high voltage converter transformer on-line monitoring device and method thereof

Info

Publication number: CN113503909A
Application number: CN202110543476.XA
Authority: CN
Inventors: 梁轩伟; 安晨光; 杨柳青
Original assignee: Hunan Huadian Yuntong Power Technical Co ltd
Current assignee: Hunan Huadian Yuntong Power Technical Co ltd
Priority date: 2021-05-19
Filing date: 2021-05-19
Publication date: 2021-10-15
Anticipated expiration: 2041-05-19
Also published as: CN113503909B

Abstract

The invention provides an extra-high voltage converter transformer on-line monitoring device and a method thereof, which comprises an acquisition component, an oil inlet component, an oil outlet component and a control component, wherein oil with different heights in a transformer is sucked in through the oil inlet component and discharged through the oil outlet component, the acquisition component separates hydrogen in the oil in the process of sucking and discharging the oil, and simultaneously acquires the flow of the oil and the flow of the hydrogen obtained by separation to obtain accurate numerical values of the hydrogen content of oil layers with different heights in an oil tank of the transformer, a first temperature sensor and a first pressure sensor which are arranged in the oil inlet component detect the numerical values of the temperature and the pressure of the oil layers with different heights in the oil tank, and a second temperature sensor and a second pressure sensor which are arranged in the oil outlet component detect the numerical values of the temperature and the pressure of the oil layers with different heights in the oil tank of the transformer, so that the problems that the hydrogen, the hydrogen and the hydrogen in the oil layers with different heights in the oil tank of the transformer cannot be detected by the existing on-line monitoring device are solved, The accurate values of temperature and pressure lead to the problem of inaccurate detection results.

Description

Extra-high voltage converter transformer on-line monitoring device and method thereof

Technical Field

The invention relates to the technical field of transformer monitoring devices, in particular to an extra-high voltage converter transformer on-line monitoring device and a method thereof.

Background

The ultra-high voltage transformer is a 1000 kV-level transformer, after a fault occurs inside the transformer, hydrogen can be generated inside an oil tank, the hydrogen can be dissolved in oil inside the oil tank after being generated, the hydrogen can not be found easily at the initial stage, meanwhile, the oil inside the oil tank has poor fluidity, the hydrogen content in oil layers with different heights is different, the hydrogen content in the oil layer close to the fault part is higher, the hydrogen content can not be accurately judged in the online monitoring process, meanwhile, the temperature and the pressure in the oil layers with different heights in the online monitoring process are also different, and the temperature and the pressure data acquired by the current online monitoring device are inaccurate.

Disclosure of Invention

The embodiment of the invention provides an extra-high voltage converter transformer on-line monitoring device and a method thereof, wherein by arranging an oil inlet assembly, an oil outlet assembly and a collection assembly, oil with different heights in a transformer is sucked through the oil inlet assembly and is discharged through the oil outlet assembly, the collection assembly separates hydrogen in the oil in the process of sucking and discharging the oil, and simultaneously collects the flow of the oil and the flow of the separated hydrogen to obtain accurate numerical values of the hydrogen content of oil layers with different heights in an oil tank of the transformer, a first temperature sensor and a first pressure sensor which are arranged in the oil inlet assembly detect the numerical values of the temperature and the pressure of the oil layers with different heights in the oil tank, and a second temperature sensor and a second pressure sensor which are arranged in the oil outlet assembly detect the numerical values of the temperature and the pressure of the oil layers with different heights in the oil tank of the transformer, so that the problems that the hydrogen, the hydrogen and the hydrogen in the oil layers with different heights in the oil tank of the transformer cannot be detected by the existing on-line monitoring device at present are solved, The accurate values of the temperature and the pressure cause the problem of inaccurate detection results.

In view of the above problems, the technical solution proposed by the present invention is:

an extra-high voltage converter transformer on-line monitoring device comprises:

the collecting assembly is arranged at the top of the oil tank and comprises a protective shell, a gas extracting device, a connecting pipe and a gas separating device;

the protective shell is arranged on one side of the top of the oil tank, the gas extraction device is arranged on the top of the inner wall of the protective shell, one end of the connecting pipe is communicated with the gas extraction device, and the gas separation device is communicated with the other end of the connecting pipe;

the oil inlet assembly comprises an oil inlet pipeline, a first fixing pipe, a first electromagnetic valve, a first temperature sensor, a first pressure sensor, a first pipe clamp and a first plugging head;

one end of the oil inlet pipeline is communicated with the inside of the protective shell, the other end of the oil inlet pipeline penetrates through the top of the oil tank from top to bottom and extends to one side of the inside of the oil tank, the first blocking head is arranged on the end face of the other end of the oil inlet pipeline and is used for blocking the other end of the oil inlet pipeline, a first hole is formed in the surface of the oil inlet pipeline, one end of the first fixing pipe is communicated with the first hole, the first electromagnetic valve is arranged at one end of the inside of the first fixing pipe, the first temperature sensor and the first pressure sensor are arranged at the other end of the inside of the first fixing pipe, one end of the first pipe clamp is connected with the inner wall of the oil tank, and the other end of the first pipe clamp is connected with the surface of the first fixing pipe;

the oil outlet assembly comprises an oil outlet pipeline, a second fixing pipe, a second electromagnetic valve, a second temperature sensor, a second pressure sensor, a second pipe clamp and a second plugging head;

wherein one end of the oil outlet pipeline is communicated with the inside of the protective shell, one end of the oil outlet pipeline is communicated with one end of the oil inlet pipeline, the other end of the oil outlet pipeline penetrates through the top of the oil tank from top to bottom, and extends to the other side of the inside of the oil tank, the second plugging head is arranged on the end face of the other end of the oil outlet pipeline, the oil outlet pipe is used for plugging the other end of the oil outlet pipe, a second hole site is arranged on the surface of the oil outlet pipe, one end of the second fixed pipe is communicated with the second hole site, the second electromagnetic valve is arranged at one end inside the second fixed pipe, the second temperature sensor and the second pressure sensor are arranged at the other end of the inner part of the second fixed pipe, one end of the second pipe clamp is connected with the inner wall of the oil tank, and the other end of the second pipe clamp is connected with the surface of the second fixing pipe;

the control assembly comprises an oil pump, a first flow meter, a second flow meter, a controller, a control cabinet and a display screen;

the first flowmeter is installed on the oil inlet pipeline and located inside the protective shell, the oil pump is installed on the oil outlet pipeline, the controller is arranged inside the control cabinet, the display screen is arranged on the surface of the control cabinet, and the control cabinet is arranged on one side of the transformer.

In order to better realize the technical scheme of the invention, the following technical measures are also adopted.

Further, gas extraction device includes separation base, hydrogen sensor, vacuum pump, intake pipe and blast pipe, the separation base install in protective housing's inner wall top, the inside of separation base has set gradually first cavity and second cavity, the hydrogen sensor install in the inner wall top of first cavity, the vacuum pump install in the inside of second cavity, the one end of intake pipe with the air inlet intercommunication of vacuum pump, the other end of intake pipe with inside one side intercommunication in the first cavity, the one end of connecting pipe with the inside opposite side intercommunication of first cavity, the one end of blast pipe with the gas outlet intercommunication of vacuum pump, the other end of blast pipe link up in proper order the separation base with protective housing extends to protective housing's outside.

Furthermore, the other end of the exhaust pipe and the protective shell are obliquely arranged, and an included angle between the other end of the exhaust pipe and the protective shell is thirty degrees.

Furthermore, the oil inlet pipeline is arranged inside the oil tank in an S-shaped distribution mode, the opening at the other end of the first fixing pipe faces the opening at the other end of the second fixing pipe, the first fixing pipe and the second fixing pipe are parallel to the bottom of the oil tank, and the axle center of the first fixing pipe and the axle center of the second fixing pipe are located on the same straight line.

Further, the oil feed subassembly with the size shape and the structure of producing oil the subassembly are all unanimous completely, just the oil feed subassembly with it is the mirror image setting to produce oil the subassembly, first hole site first fixed pipe first solenoid valve first temperature sensor with first pressure sensor's quantity is greater than one at least, and even equidistance distribute in advance oil pipe's surface, the second hole site the fixed pipe of second the second solenoid valve second temperature sensor with second pressure sensor's quantity is greater than one at least, and evenly distributed in produce oil pipe's surface.

Further, the gas separation device includes fixed sleeve, solid fixed ring, sealer, filter equipment and connecting device, fixed sleeve set up in advance oil pipe's surface is located first flowmeter is close to one side of oil pump, fixed sleeve with advance oil pipe's inside intercommunication, gu fixed ring filter equipment with connecting device from bottom to top install gradually in fixed sleeve's inside, the other end of connecting pipe with the connecting device intercommunication, the sealer set up in gu fixed ring with between the filter equipment, the sealer set up in connecting device with between the filter equipment.

Further, the sealer comprises an annular air bag and salient points, the salient points are arranged on the surface of the annular air bag, the interior of the annular air bag is of a hollow structure and is filled with air, and the annular air bag and the salient points are made of fluorosilicone rubber.

Further, filter equipment includes mount and filtration membrane, filtration membrane set up in the inside of mount, the shape of mount is ring shape, filtration membrane is for passing through the hydrogen membrane, the outer wall of mount with clearance fit between the fixed sleeve's the inner wall, connecting device includes connecting sleeve, first sealing ring, second sealing ring and ball, the internal surface of second sealing ring is seted up flutedly, the outer wall of first sealing ring is provided with the protruding portion, this protruding portion with the restriction that cooperatees of recess the position of first sealing ring, the ball set up in first sealing ring with between the second sealing ring, connecting sleeve install in the top of first sealing ring, connecting sleeve's outer wall with threaded connection between the fixed sleeve's the inner wall.

Further, the signal input end of the controller is respectively in communication connection with the signal output ends of the hydrogen sensor, the first temperature sensor, the second temperature sensor, the first pressure sensor, the second pressure sensor, the first flowmeter and the second flowmeter, and the signal output end of the controller is respectively in communication connection with the signal input ends of the first electromagnetic valve, the second electromagnetic valve, the vacuum pump, the oil pump and the display screen.

An extra-high voltage converter transformer on-line monitoring method comprises the following steps:

s1, oil pumping and oil discharging, wherein the controller starts an oil pump, sequentially opens a first electromagnetic valve and a second electromagnetic valve which are at the lowest positions of the oil inlet pipeline and the oil outlet pipeline and have the same height, the oil pump generates negative pressure in the oil inlet pipeline, enters the oil inlet pipeline through a first fixed pipe and is conveyed into the oil outlet pipeline, returns to the inside of the oil tank through a second fixed pipe, closes the first electromagnetic valve and the second electromagnetic valve at the height after continuously pumping oil and discharging oil for 1min, and sequentially opens the first electromagnetic valve and the second electromagnetic valve at the same height upwards to continuously pump oil and discharge oil for 1min and then closes the oil tank until the oil layer at the whole height is pumped and discharged oil;

s2, hydrogen separation, wherein in the oil pumping and oil discharging process of the step S1, the controller starts an oil pump vacuum pump, the vacuum pump generates negative pressure in the first chamber, the connecting pipe and the gas separation device through the air inlet pipe, and in the process that oil in the oil tank flows into the oil outlet pipe from the oil inlet pipe, hydrogen in the oil permeates through the filtering membrane, enters the first chamber through the connecting pipe, and is discharged to the outside of the protective shell through the air inlet pipe and the exhaust pipe;

s3, detecting hydrogen, wherein the hydrogen entering the first chamber triggers a hydrogen sensor, and the hydrogen sensor transmits a signal to a controller;

s4, detecting the temperature, wherein the first temperature sensor and the second temperature sensor respectively detect the temperature of oil layers with different heights and send signals to the controller;

s5, detecting pressure, wherein the first pressure sensor and the second pressure sensor respectively detect the pressure of oil layers with different heights and send signals to the controller;

s6, flow detection, which is to detect the flow of oil pumping and oil discharging and the flow of hydrogen gas extraction;

wherein the step S6 includes:

s61, the flow of the oil is pumped, the first flow meter detects the flow of the oil pumped by the oil pump in the process that the oil in the oil tank flows into the oil outlet pipeline from the oil inlet pipeline, and sends a signal to the controller;

s62, the flow of the oil is pumped, the first flow meter detects the flow of the oil pumped by the oil pump in the process that the oil in the oil tank flows into the oil outlet pipeline from the oil inlet pipeline, and sends a signal to the controller;

and S7, analyzing the data, obtaining the temperature data of the oil layers with different heights and the average temperature of the oil in the oil tank by the controller according to the input signals sent by the first temperature sensor and the second temperature sensor with different heights, obtaining the pressure data of the oil layers with different heights and the average pressure of the oil in the oil tank by the controller according to the input signals sent by the first pressure sensor and the second pressure sensor with different heights, obtaining the hydrogen content in the oil layers with different heights in the oil tank and the average hydrogen content and the total hydrogen content of the oil in the oil tank by the controller according to the flow signals of the oil sucked and discharged by the first flow meter and the flow signal of the hydrogen discharged by the second flow meter and displaying the analyzed data through a display screen.

Compared with the prior art, the invention has the beneficial effects that: by arranging the oil inlet assembly, the oil outlet assembly and the collecting assembly, oil with different heights in the transformer is sucked through the oil inlet assembly and is discharged through the oil outlet assembly, the collecting assembly separates hydrogen in the oil in the process of sucking and discharging the oil, and simultaneously collects the flow of the oil and the flow of the separated hydrogen to obtain accurate numerical values of the hydrogen content of oil layers with different heights in the transformer oil tank, a first temperature sensor and a first pressure sensor which are arranged in the oil inlet assembly detect the numerical values of the temperature and the pressure of the oil layers with different heights in the oil tank, and a second temperature sensor and a second pressure sensor which are arranged in the oil outlet assembly detect the numerical values of the temperature and the pressure of the oil layers with different heights in the oil tank, so that the problem that the existing on-line monitoring device cannot detect the accurate numerical values of the hydrogen, the temperature and the pressure in the oil layers with different heights in the transformer oil tank is solved, leading to the problem of inaccurate detection results.

The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.

Drawings

FIG. 1 is a schematic perspective view of an extra-high voltage converter transformer on-line monitoring device according to an embodiment of the present invention;

FIG. 2 is a schematic view of a first cross-sectional structure of an extra-high voltage converter transformer on-line monitoring device according to an embodiment of the present invention;

FIG. 3 is an enlarged view of the structure at A in FIG. 2;

FIG. 4 is a schematic view of a second perspective cross-sectional structure of an extra-high voltage converter transformer on-line monitoring device disclosed in the embodiment of the invention;

FIG. 5 is an enlarged view of the structure at A in FIG. 4;

FIG. 6 is a schematic view of a third perspective cross-sectional structure of an extra-high voltage converter transformer on-line monitoring device disclosed in an embodiment of the present invention;

FIG. 7 is an enlarged view of the structure at A in FIG. 6;

FIG. 8 is an enlarged view of the structure at B in FIG. 6;

FIG. 9 is a schematic cross-sectional view of a collection assembly according to an embodiment of the present disclosure;

FIG. 10 is a schematic cross-sectional view of a gas separation unit according to an embodiment of the present invention;

FIG. 11 is an enlarged view of the structure at A in FIG. 10;

FIG. 12 is a schematic structural diagram of a control cabinet according to an embodiment of the disclosure;

FIG. 13 is a communication block diagram of an extra-high voltage converter transformer on-line monitoring device disclosed in the embodiment of the present invention;

fig. 14 is a schematic flow chart of a method for online monitoring of an extra-high voltage converter transformer, which is disclosed by the embodiment of the invention.

Reference numerals: 100. a collection assembly; 101. a protective housing; 102. a gas extraction device; 10201. separating the base; 1020101, a first chamber; 1020102, a second chamber; 10202. a hydrogen sensor; 10203. a vacuum pump; 10204. an air inlet pipe; 10205. an exhaust pipe; 103. a connecting pipe; 104. a gas separation device; 10401. fixing the sleeve; 10402. a fixing ring; 10403. a sealer; 1040301, annular balloon; 1040302, bumps; 10404. a filtration device; 1040401, a fixing frame; 1040402, a filter membrane; 10405. a connecting device; 1040501, a connecting sleeve; 1040502, a first seal ring; 1040503, a second seal ring; 104050301, a groove; 1040504, balls; 200. an oil inlet assembly; 201. an oil inlet pipeline; 202. a first hole site; 203. a first stationary tube; 204. a first solenoid valve; 205. a first temperature sensor; 206. a first pressure sensor; 207. a first pipe clamp; 208. a first plugging head; 300. an oil outlet assembly; 301. an oil outlet pipeline; 302. a second hole site; 303. a second stationary tube; 304. a second solenoid valve; 305. a second temperature sensor; 306. a second pressure sensor; 307. a second pipe clamp; 308. a second plugging head; 400. a control component; 401. an oil pump; 402. a first flow meter; 403. a second flow meter; 404. a controller; 405. a control cabinet; 406. a display screen; 500. a transformer; 501. and an oil tank.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-13, an extra-high voltage converter transformer on-line monitoring device includes a collection assembly 100, an oil inlet assembly 200, an oil outlet assembly 300, and a control assembly 400.

Referring to fig. 1, 2, 4, 6 and 9-11, the collection assembly 100 is arranged at the top of an oil tank 501, the collection assembly 100 includes a protective casing 101, a gas extraction device 102, a connection pipe 103 and a gas separation device 104, the protective casing 101 is installed at one side of the top of the oil tank 501, the protective casing 101 is used for protecting the gas extraction device 102, the connection pipe 103 and the gas separation device 104 inside, the protective casing 101 is made of an aluminum alloy material, the exterior of the protective casing 101 is coated with a waterproof anticorrosive coating, the gas extraction device 102 is arranged at the top of the inner wall of the protective casing 101, one end of the connection pipe 103 is communicated with the gas extraction device 102, and the gas separation device 104 is communicated with the other end of the connection pipe 103;

specifically, the gas extraction apparatus 102 includes a separation base 10201, a hydrogen sensor 10202, a vacuum pump 10203, an air inlet tube 10204 and an air outlet tube 10205, the separation base 10201 is mounted on the top of the inner wall of the protective housing 101, a first chamber 1020101 and a second chamber 1020102 are sequentially disposed inside the separation base 10201, the first chamber 1020101 is used for storing gas, the hydrogen sensor 10202 is mounted on the top of the inner wall of the first chamber 1020101 and is used for detecting hydrogen in the gas inside the first chamber 1020101, the vacuum pump 10203 is mounted inside the second chamber 1020102, one end of the air inlet tube 10204 is communicated with an air inlet of the vacuum pump 10203, the other end of the air inlet tube 10204 is communicated with one side inside the first chamber 1020101, one end of the connection tube 103 is communicated with the other side inside the first chamber 1020101, one end of the air outlet tube 10205 is communicated with an air outlet of the vacuum pump 10203, the other end of the air outlet tube 10205 sequentially penetrates through the separation base 10201 and the protective housing 101 and extends to the outside the protective housing 101, the gas separation device 104 comprises a fixed sleeve 10401, a fixed ring 10402, a sealer 10403, a filter device 10404 and a connecting device 10405, the fixed sleeve 10401 is arranged on one side, close to the oil pump 401, of the first flowmeter 402 on the surface of the oil inlet pipeline 201, the fixed sleeve 10401 is communicated with the inside of the oil inlet pipeline 201, the fixed ring 10402, the filter device 10404 and the connecting device 10405 are sequentially installed inside the fixed sleeve 10401 from bottom to top, the other end of the connecting pipe 103 is communicated with the connecting device 10405, the sealer 10403 is arranged between the fixed ring 10402 and the filter device 10404, the sealer 10403 is arranged between the connecting device 10405 and the filter device 10404, the filter device 10404 comprises a fixed frame 1040401 and a filter membrane 1040402, the filter membrane 1040402 is arranged inside the fixed frame 1040401, the fixed frame 1040401 is annular, the filter membrane 1040402 is a hydrogen permeable membrane, the outer wall of the fixed frame 1040401 is in clearance fit with the inner wall of the fixed sleeve 10401, the connecting device 10405 comprises a connecting sleeve 1040501, a sealing ring 10405, The sealing device comprises a first sealing ring 1040502, a second sealing ring 1040503 and balls 1040504, wherein a groove 104050301 is formed in the inner surface of the second sealing ring 1040503, a protruding portion is arranged on the outer wall of the first sealing ring 1040502, the protruding portion is matched with the groove 104050301 to limit the position of the first sealing ring 1040502, the balls 1040504 are arranged between a first sealing ring 1040502 and the second sealing ring 1040503 and used for reducing the friction force between the first sealing ring 1040502 and the second sealing ring 1040503, a connecting sleeve 1040501 is mounted at the top of the first sealing ring 1040502, the outer wall of the connecting sleeve 1040501 is in threaded connection with the inner wall of a fixed sleeve 10401, a connecting device 10405 is in connection with the fixed sleeve 10401, the connecting sleeve 1040501 is in threaded connection with the inner wall of the fixed sleeve 10401, the connecting sleeve 1040501 is rotated to drive the first sealing ring 1040502 and the second sealing ring 1040503 to move downwards, the second sealing ring 1040503 is in contact with a sealer 10403 and then is pressed against the sealer 10403 through the action of the friction force, the connecting sleeve 1040501 is not rotated in the downward movement process of the connecting sleeve 1040501, the situation that the sealing device 10403 is twisted and deformed after the rotation, so that the position of the filtering device 10404 is jumped, and the sealing is not tight is avoided, the number of the gas separation devices 104 corresponds to that of the connecting pipes 103, the number of the gas separation devices 104 and the connecting pipes 103 is at least more than one, in a case where the power of the vacuum pump 10203 is maintained, as the number of the gas separation means 104 and the connection pipe 103 increases within a certain range, the efficiency of separating the hydrogen gas dissolved in the oil in the tank 501 of the transformer 500 increases, after the vacuum pump 10203 is started, negative pressure is generated in the connecting pipe 103, hydrogen dissolved in oil in the oil tank 501 of the transformer 500 is separated from the oil through the gas separation device 104, enters the connecting pipe 103 and enters the first chamber 1020101 to be detected by the hydrogen sensor 10202, and the oil is blocked by the gas separation device 104 to avoid entering the inside;

in this embodiment, the other end of the exhaust pipe 10205 is obliquely arranged with the protective housing 101, an included angle between the other end of the exhaust pipe 10205 and the protective housing 101 is thirty degrees, external dust and rainwater are not easy to enter the exhaust pipe 10205, and oil pollution caused by entering the oil tank 501 of the transformer 500 is avoided;

as a preferred embodiment, the sealer 10403 includes an annular bladder 1040301 and a protruding point 1040302, the protruding point 1040302 is disposed on the surface of the annular bladder 1040301, the interior of the annular bladder 1040301 is hollow and filled with air, the deformation degree is large, the annular bladder 1040301 and the protruding point 1040302 are made of fluorosilicone rubber, the annular bladder 1040301 is squeezed and deformed during the downward squeezing process in the process of connecting the connection device 10405 with the fixing sleeve 10401, and the gap between the filter device 10404 and the contact portion between the fixing ring 10402 and the connection device 10405 is filled, so that the sealing effect is better, and the protruding point 1040302 can prevent the filter device 10404 and the fixing ring 10402 and the connection device 10405 from sliding and fixing the position between the filter device 10404 and the fixing ring 10402 and the connection device 10405, prevent the filter device 10404 from being displaced and then being unparallel to the fixing ring 10402 and the connection device 10405, thereby causing leakage, and causing insufficient vacuum degree in the connection pipe 103, resulting in poor separation of hydrogen from the oil.

Referring to fig. 2 to 8, the oil inlet assembly 200 includes an oil inlet pipe 201, a first fixed pipe 203, a first electromagnetic valve 204, a first temperature sensor 205, a first pressure sensor 206, a first pipe clamp 207 and a first blocking head 208, one end of the oil inlet pipe 201 is communicated with the inside of the protective housing 101, the other end of the oil inlet pipe 201 penetrates the top of the oil tank 501 from top to bottom and extends to one side of the inside of the oil tank 501, the first blocking head 208 is disposed on the end surface of the other end of the oil inlet pipe 201 and is used for blocking the other end of the oil inlet pipe 201, a first hole site 202 is disposed on the surface of the oil inlet pipe 201, one end of the first fixed pipe 203 is communicated with the first hole site 202, the first electromagnetic valve 204 is disposed at one end of the inside of the first fixed pipe 203, the first temperature sensor 205 and the first pressure sensor 206 are disposed at the other end of the inside of the first fixed pipe 203, one end of the first pipe clamp 207 is connected with the inner wall of the oil tank 501, the other end of the first pipe clamp 207 is connected with the surface of the first fixing pipe 203, the number of the first pipe clamp 207 is at least more than one, and the first pipe clamp 207 is used for fixing the position of the oil inlet pipe 201, the oil outlet assembly 300 comprises an oil outlet pipe 301, a second fixing pipe 303, a second electromagnetic valve 304, a second temperature sensor 305, a second pressure sensor 306, a second pipe clamp 307 and a second plugging head 308, one end of the oil outlet pipe 301 is communicated with the inside of the protective shell 101, one end of the oil outlet pipe 301 is communicated with one end of the oil inlet pipe 201, the other end of the oil outlet pipe 301 penetrates through the top of the oil tank 501 from top to bottom and extends to the other side of the inside of the oil tank 501, the second plugging head 308 is arranged on the end face of the other end of the oil outlet pipe 301 and is used for plugging the other end of the oil outlet pipe 301, a second hole 302 is arranged on the surface of the oil outlet pipe 301, one end of the second fixing pipe 303 is communicated with the second hole 302, the second electromagnetic valve 304 is arranged at one end of the inside of the second fixing pipe 303, the second temperature sensor 305 and the second pressure sensor 306 are arranged at the other end of the inside of the second fixed pipe 303, one end of the second pipe clamp 307 is connected with the inner wall of the oil tank 501, the other end of the second pipe clamp 307 is connected with the surface of the second fixed pipe 303, and the number of the second pipe clamps 307 is at least more than one and is used for fixing the position of the oil outlet pipeline 301;

specifically, the oil inlet pipe 201 is distributed in an S-shape inside the oil tank 501, the opening at the other end of the first fixed pipe 203 faces the opening at the other end of the second fixed pipe 303, the first fixed pipe 203 and the second fixed pipe 303 are parallel to the bottom of the oil tank 501, the axis of the first fixed pipe 203 and the axis of the second fixed pipe 303 are located on the same straight line, the size and the shape of the oil inlet assembly 200 and the size and the structure of the oil outlet assembly 300 are completely consistent, the oil inlet assembly 200 and the oil outlet assembly 300 are arranged in a mirror image manner, the number of the first hole site 202, the first fixed pipe 203, the first electromagnetic valve 204, the first temperature sensor 205 and the first pressure sensor 206 is at least more than one and is uniformly and equidistantly distributed on the surface of the oil inlet pipe 201, the number of the second hole site 302, the second fixed pipe 303, the second electromagnetic valve 304, the second temperature sensor 305 and the second pressure sensor 306 is at least more than one and is uniformly distributed on the surface of the oil outlet pipe 301, the first temperature sensor 205 and the second temperature sensor 305 are used for detecting the temperatures of oil layers with different heights in the oil tank 501 of the transformer 500, the first pressure sensor 206 and the second pressure sensor 306 are used for detecting the pressures of the oil layers with different heights in the oil tank 501 of the transformer 500, the first electromagnetic valve 204 and the second electromagnetic valve 304 at the same horizontal height are opened at the same time, the first electromagnetic valve 204 and the second electromagnetic valve 304 at other heights are closed, the oil suction and oil discharge processes of the oil inlet pipeline 201 and the oil outlet pipeline 301 are in the same oil layer range, the influence on other oil layers is reduced, and the problem that the accurate numerical values of the hydrogen, the temperatures and the pressures in the oil layers with different heights in the oil tank 501 of the transformer 500 cannot be detected by the existing online monitoring device and the detection result is inaccurate is solved.

Referring to fig. 1-13, the control assembly 400 includes an oil pump 401, a first flowmeter 402, a second flowmeter 403, a controller 404, a control cabinet 405 and a display screen 406, the first flowmeter 402 is mounted on the oil inlet pipe 201 and located inside the protective housing 101, the oil pump 401 is mounted on the oil outlet pipe 301, the controller 404 is disposed inside the control cabinet 405 and not visible in fig. 1-12, the display screen 406 is disposed on the surface of the control cabinet 405, the control cabinet 405 is disposed on one side of the transformer 500, signal input ends of the controller 404 are respectively connected to signal output ends of the hydrogen sensor 10202, the first temperature sensor 205, the second temperature sensor 305, the first pressure sensor 206, the second pressure sensor 306, the first flowmeter 402 and the second flowmeter 403 in communication, and signal output ends of the controller 404 are respectively connected to the first solenoid valve 204, the second solenoid valve 304, the vacuum pump 10203, The oil pump 401 is in communication connection with the signal input end of the display screen 406;

specifically, the controller 404 starts the oil pump 401, sequentially opens the first electromagnetic valve 204 and the second electromagnetic valve 304 at the lowest position of the oil inlet pipe 201 and the oil outlet pipe 301, which have the same height, the oil pump 401 generates negative pressure inside the oil inlet pipe 201, enters the oil inlet pipe 201 through the first fixed pipe 203 and is conveyed into the oil outlet pipe 301, and is discharged back to the inside of the oil tank 501 through the second fixed pipe 303, the first electromagnetic valve 204 and the second electromagnetic valve 304 at the height are closed after oil pumping and oil discharging continues for 1min, the first electromagnetic valve 204 and the second electromagnetic valve 304 at the same height are sequentially opened upwards, oil pumping and oil discharging continues for 1min until the oil layer at the whole height passes through oil pumping and oil discharging, for example, the height of the oil layer in the oil tank 501 is divided into A, B and C from low to high, wherein the first electromagnetic valve 204 (numbered 1 to 5) is arranged in parallel from left to right in the oil inlet pipe 201 at the height a, the first electromagnetic valves 204 (numbered 6-10) are arranged in parallel from left to right in the oil inlet pipeline 201 in the height B, the first electromagnetic valves 204 (numbered 11-15) are arranged in parallel from left to right in the oil inlet pipeline 201 in the height C, the second electromagnetic valves 304 (numbered 1-5) are arranged in parallel from left to right in the oil outlet pipeline 301 in the height A, the second electromagnetic valves 304 (numbered 6-10) are arranged in parallel from left to right in the oil outlet pipeline 301 in the height B, the second electromagnetic valves 304 (numbered 11-15) are arranged in parallel from left to right in the oil outlet pipeline 301 in the height C, the controller 404 sequentially opens the first electromagnetic valves 204 (numbered 1-5) in the oil inlet pipeline 201 in the height A and the first electromagnetic valves 204 (numbered 1-5) in the oil outlet pipeline 301 in the height C, the oil in the oil tank 501 enters the oil inlet pipeline 201 from the first electromagnetic valves 204 (numbered 1-5) through the first fixed pipe 203, and is delivered into the oil outlet pipe 301, and is discharged back to the oil tank 501 through the second electromagnetic valve 304 (numbered 1-5), after continuously pumping and discharging oil for 1min, the first electromagnetic valve 204 (numbered 1-5) and the second electromagnetic valve 304 (numbered 1-5) at the height are closed, the first electromagnetic valve 204 (numbered 6-10) in the oil inlet pipe 201 and the first electromagnetic valve 204 (numbered 6-10) in the oil outlet pipe 301 at the height B are opened, the oil in the oil tank 501 enters the oil inlet pipe 201 from the first electromagnetic valve 204 (numbered 6-10) through the first fixed pipe 203 and is delivered into the oil outlet pipe 301, and is discharged back to the oil tank 501 through the second electromagnetic valve 304 (numbered 6-10), after continuously pumping and discharging oil for 1min, the first electromagnetic valve 204 (numbered 6-10) and the second electromagnetic valve 304 (numbered 6-10) at the height are closed, closing the first electromagnetic valve 204 (numbered 6-10) and the second electromagnetic valve 304 (numbered 6-10) at the height after continuously pumping and discharging oil for 1min, opening the first electromagnetic valve 204 (numbered 11-15) in the oil inlet pipeline 201 and the first electromagnetic valve 204 (numbered 11-15) in the oil outlet pipeline 301 at the height C, allowing the oil in the oil tank 501 to enter the oil inlet pipeline 201 from the first electromagnetic valve 204 (numbered 11-15) through the first fixing pipe 203, conveying the oil into the oil outlet pipeline 301, discharging the oil back to the oil tank 501 through the second electromagnetic valve 304 (numbered 11-15), closing the first electromagnetic valve 204 (numbered 11-15) and the second electromagnetic valve 304 (numbered 11-15) at the height after continuously pumping and discharging oil for 1min, in the process, the controller 404 obtains the hydrogen content in different oil layer heights in the oil tank 501, the average hydrogen content and the total hydrogen content in the oil tank 501 simultaneously according to the flow signals of the sucked and discharged oil with different heights input by the first flow meter 402 and the flow signal of the discharged hydrogen with corresponding height input by the second flow meter 403, obtains the temperature data of the oil layers with different heights and the average temperature of the oil in the oil tank 501 according to the input signals sent by the first temperature sensor 205 and the second temperature sensor 305 with different heights, obtains the pressure data of the oil layers with different heights and the average pressure of the oil in the oil tank 501 according to the input signals sent by the first pressure sensor 206 and the second pressure sensor 306 with different heights, and solves the problem that the existing online monitoring device cannot detect the hydrogen, the hydrogen gas and the total hydrogen in the oil layer 501 in the transformer 500, The accurate values of the temperature and the pressure cause the problem of inaccurate detection results.

The embodiment of the invention is also realized by the following technical scheme.

Referring to fig. 1-14, the present invention further provides an on-line monitoring method for an extra-high voltage converter transformer 500, comprising the following steps:

s1, oil pumping and oil discharging, wherein the controller 404 starts the oil pump 401, sequentially opens the first electromagnetic valve 204 and the second electromagnetic valve 304 which have the same height and are at the lowest position of the horizontal positions on the oil inlet pipeline 201 and the oil outlet pipeline 301, the oil pump 401 generates negative pressure in the oil inlet pipeline 201, enters the oil inlet pipeline 201 through the first fixing pipe 203, is conveyed into the oil outlet pipeline 301, is discharged back to the inside of the oil tank 501 through the second fixing pipe 303, closes the first electromagnetic valve 204 and the second electromagnetic valve 304 at the height after oil pumping and oil discharging are continued for 1min, sequentially opens the first electromagnetic valve 204 and the second electromagnetic valve 304 at the same height upwards, continues oil pumping and oil discharging for 1min, and closes until the oil layer at the whole height passes through oil pumping and oil discharging;

s2, hydrogen separation, wherein in the oil pumping and oil discharging process of the step S1, the controller 404 starts the oil pump 401 and the vacuum pump 10203, the vacuum pump 10203 generates negative pressure in the first chamber 1020101, the connecting pipe 103 and the gas separation device 104 through the air inlet pipe 10204, and in the process that the oil in the oil tank 501 flows into the oil outlet pipe 301 from the oil inlet pipe 201, the hydrogen in the oil permeates the filtering membrane 1040402, enters the first chamber 1020101 through the connecting pipe 103, and discharges the pumped hydrogen to the outside of the protective shell 101 through the air inlet pipe 10204 and the air outlet pipe 10205;

s3, hydrogen detection, hydrogen entering the interior of the first chamber 1020101 triggering the hydrogen sensor 10202, the hydrogen sensor 10202 transmitting a signal to the controller 404;

s4, detecting temperature, the first temperature sensor 205 and the second temperature sensor 305 respectively detecting the temperature of the oil layers with different heights, and sending signals to the controller 404;

s5, detecting the pressure, the first pressure sensor 206 and the second pressure sensor 306 respectively detecting the pressures of the oil layers with different heights, and sending signals to the controller 404;

wherein, step S6 includes:

s61, the flow of the pumped oil is detected by the first flow meter 402 in the process that the oil in the oil tank 501 flows into the oil outlet pipeline 301 from the oil inlet pipeline 201, and a signal is sent to the controller 404;

s62, the flow of the pumped oil is detected by the first flow meter 402 in the process that the oil in the oil tank 501 flows into the oil outlet pipeline 301 from the oil inlet pipeline 201, and a signal is sent to the controller 404;

s7, analyzing the data, the controller 404 obtaining the data of the temperature of the oil layers with different heights and the average temperature of the oil in the oil tank 501 according to the input signals sent by the first temperature sensor 205 and the second temperature sensor 305 with different heights, the controller 404 obtaining the pressure data of the oil layers with different heights and the average pressure of the oil in the oil tank 501 according to the input signals sent by the first pressure sensor 206 and the second pressure sensor 306 with different heights, the controller 404 obtaining the hydrogen content in the oil layer with different heights in the oil tank 501 and the average hydrogen content and the total hydrogen content of the oil in the oil tank 501 according to the input flow signals of the oil sucked and discharged at different heights of the first flow meter 402 and the input signal of the hydrogen discharged at the corresponding height of the second flow meter 403, and displaying the analyzed data through the display screen 406.

Specifically, the first temperature sensor 205 and the second temperature sensor 305 detect the temperatures of oil layers with different heights respectively and send signals to the controller 404, the first pressure sensor 206 and the second pressure sensor 306 detect the pressures of the oil layers with different heights respectively and send signals to the controller 404, when the hydrogen content of the oil layers is detected, the controller 404 starts the oil pump 401, the first electromagnetic valve 204 and the second electromagnetic valve 304 with the same height at the lowest horizontal position on the oil inlet pipeline 201 and the oil outlet pipeline 301 are opened in sequence, the oil pump 401 generates negative pressure inside the oil inlet pipeline 201, enters the oil inlet pipeline 201 through the first fixed pipe 203 and is conveyed into the oil outlet pipeline 301, the oil is discharged back to the inside of the oil tank 501 through the second fixed pipe 303, the first electromagnetic valve 204 and the second electromagnetic valve 304 with the same height are closed after oil is continuously pumped and drained for 1min, and the first electromagnetic valve 204 and the second electromagnetic valve 304 with the same height are opened upwards in sequence and are closed until all the oil is continuously pumped and drained for 1min The high oil layer is pumped and discharged, during the oil pumping and discharging process, the controller 404 starts the vacuum pump 10203 of the oil pump 401, the vacuum pump 10203 generates negative pressure in the first chamber 1020101, the connecting pipe 103 and the gas separating device 104 through the air inlet pipe 10204, during the process that the oil in the oil tank 501 flows into the oil outlet pipe 301 from the oil inlet pipe 201, the hydrogen in the oil permeates the filtering membrane 1040402, enters the first chamber 1020101 through the connecting pipe 103, and discharges the pumped hydrogen to the outside of the protective shell 101 through the air inlet pipe 10204 and the air outlet pipe 10205, the first flow meter 402 detects the pumping flow of the oil pump 401 during the process that the oil in the oil tank 501 flows into the oil outlet pipe 301 from the oil inlet pipe 201 and sends a signal to the controller 404, the controller 404 obtains the temperature data of the oil layers with different heights and the average temperature of the oil in the oil tank 501 according to the input signals sent by the first temperature sensor 205 and the second temperature sensor 305 with different heights, the controller 404 obtains the pressure data of the oil layers with different heights and the average pressure of the oil in the oil tank 501 according to the input signals sent by the first pressure sensor 206 and the second pressure sensor 306 with different heights, the controller 404 obtains the hydrogen content in the oil layers with different heights in the oil tank 501 and the average hydrogen content and the total hydrogen content in the oil tank 501 according to the flow signals of the oil sucked and discharged with different heights input by the first flow meter 402 and the flow signal of the hydrogen discharged with corresponding heights input by the second flow meter 403, and the analyzed data are displayed by the display screen 406, so that the problems that the existing online monitoring device cannot detect the hydrogen in the oil layers with different heights in the oil tank 501 of the transformer 500, and the hydrogen content, hydrogen in the oil layers with different heights in the oil tank 501 of the transformer 500, and the average pressure of the oil in the oil tank 501 are solved, The accurate values of the temperature and the pressure cause the problem of inaccurate detection results.

It should be noted that, the specific model and specification of the controller 404, the hydrogen sensor 10202, the first temperature sensor 205, the second temperature sensor 305, the first pressure sensor 206, the second pressure sensor 306, the first flow meter 402, the second flow meter 403, the first electromagnetic valve 204, the second electromagnetic valve 304, the vacuum pump 10203, the oil pump 401 and the display screen 406 need to be determined by type selection according to the actual specification of the device, and the specific type selection calculation method adopts the prior art in the field, and therefore, detailed description is omitted.

The power supply and the principle of the controller 404, the hydrogen sensor 10202, the first temperature sensor 205, the second temperature sensor 305, the first pressure sensor 206, the second pressure sensor 306, the first flow meter 402, the second flow meter 403, the first solenoid valve 204, the second solenoid valve 304, the vacuum pump 10203, the oil pump 401, and the display screen 406 will be apparent to those skilled in the art and will not be described in detail herein.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. The utility model provides an extra-high voltage converter transformer on-line monitoring device, includes the transformer, the transformer includes the oil tank, its characterized in that includes:

2. The on-line monitoring device for the extra-high voltage converter transformer according to claim 1, characterized in that: the gas extraction device comprises a separation base, a hydrogen sensor, a vacuum pump, an air inlet pipe and an exhaust pipe, wherein the separation base is installed at the top of the inner wall of the protective shell, a first cavity and a second cavity are sequentially arranged inside the separation base, the hydrogen sensor is installed at the top of the inner wall of the first cavity, the vacuum pump is installed inside the second cavity, one end of the air inlet pipe is communicated with an air inlet of the vacuum pump, the other end of the air inlet pipe is communicated with one side of the inside of the first cavity, one end of a connecting pipe is communicated with the other side of the inside of the first cavity, one end of the exhaust pipe is communicated with an air outlet of the vacuum pump, and the other end of the exhaust pipe is sequentially communicated with the separation base and the protective shell and extends to the outside of the protective shell.

3. The on-line monitoring device for the extra-high voltage converter transformer according to claim 2, characterized in that: the other end of the exhaust pipe and the protective shell are arranged obliquely, and an included angle between the other end of the exhaust pipe and the protective shell is thirty degrees.

4. The on-line monitoring device for the extra-high voltage converter transformer according to claim 1, characterized in that: the oil inlet pipeline is in the inside of oil tank is S-shaped distribution, the other end opening orientation of first fixed pipe the opening of the other end of the fixed pipe of second, first fixed pipe with the fixed pipe of second with the bottom of oil tank is parallel, just the axle center of first fixed pipe with the axle center of the fixed pipe of second is located collinear.

5. The extra-high voltage converter transformer on-line monitoring device according to claim 4, characterized in that: the oil feed subassembly with the size shape and the structure of going out the oil subassembly are all identical, just the oil feed subassembly with the subassembly that produces oil is the mirror image setting, first hole site first fixed pipe first solenoid valve first temperature sensor with first pressure sensor's quantity is greater than one at least, and even equidistance distribute in advance oil pipe's surface, the second hole site the fixed pipe of second the second solenoid valve second temperature sensor with second pressure sensor's quantity is greater than one at least, and evenly distributed in go out oil pipe's surface.

6. The on-line monitoring device for the extra-high voltage converter transformer according to claim 1, characterized in that: the gas separation device comprises a fixed sleeve, a fixed ring, a sealer, a filtering device and a connecting device, wherein the fixed sleeve is arranged on the surface of the oil inlet pipeline and is located at one side of the oil pump, the fixed sleeve is communicated with the inside of the oil inlet pipeline, the fixed ring is arranged inside the fixed sleeve, the filtering device is sequentially arranged inside the connecting device from bottom to top, the other end of the connecting pipe is communicated with the connecting device, the sealer is arranged between the fixed ring and the filtering device, and the sealer is arranged between the connecting device and the filtering device.

7. The extra-high voltage converter transformer on-line monitoring device according to claim 6, characterized in that: the sealer comprises an annular air bag and salient points, wherein the salient points are arranged on the surface of the annular air bag, the inner part of the annular air bag is of a hollow structure and is filled with air, and the annular air bag and the salient points are made of fluorosilicone rubber.

8. The extra-high voltage converter transformer on-line monitoring device according to claim 6, characterized in that: filter equipment includes mount and filtration membrane, filtration membrane set up in the inside of mount, the shape of mount is ring shape, filtration membrane is for penetrating the hydrogen membrane, the outer wall of mount with clearance fit between the inner wall of fixed sleeve, connecting device includes connecting sleeve, first sealing ring, second sealing ring and ball, the internal surface of second sealing ring is seted up flutedly, the outer wall of first sealing ring is provided with the protruding portion, this protruding portion with the restriction that cooperatees of recess the position of first sealing ring, the ball set up in first sealing ring with between the second sealing ring, connecting sleeve install in the top of first sealing ring, connecting sleeve's outer wall with threaded connection between the inner wall of fixed sleeve.

9. The on-line monitoring device for the extra-high voltage converter transformer according to claim 2, characterized in that: the signal input end of the controller is respectively in communication connection with the signal output ends of the hydrogen sensor, the first temperature sensor, the second temperature sensor, the first pressure sensor, the second pressure sensor, the first flowmeter and the second flowmeter, and the signal output end of the controller is respectively in communication connection with the signal input ends of the first electromagnetic valve, the second electromagnetic valve, the vacuum pump, the oil pump and the display screen.

10. The method for on-line monitoring of the extra-high voltage converter transformer according to claims 1-9 is characterized in that: the method comprises the following steps:

wherein the step S6 includes: