CN108511173A - A kind of converter transformer valve-side sleeve overheating fault monitoring device and monitoring method - Google Patents
A kind of converter transformer valve-side sleeve overheating fault monitoring device and monitoring method Download PDFInfo
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- CN108511173A CN108511173A CN201810437818.8A CN201810437818A CN108511173A CN 108511173 A CN108511173 A CN 108511173A CN 201810437818 A CN201810437818 A CN 201810437818A CN 108511173 A CN108511173 A CN 108511173A
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- 238000013021 overheating Methods 0.000 title claims abstract description 45
- 238000012806 monitoring device Methods 0.000 title claims abstract description 28
- 238000012544 monitoring process Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims description 17
- 238000012545 processing Methods 0.000 claims abstract description 54
- 238000012423 maintenance Methods 0.000 claims abstract description 29
- 238000012360 testing method Methods 0.000 claims abstract description 23
- 238000004891 communication Methods 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 9
- 238000000354 decomposition reaction Methods 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 5
- 235000013399 edible fruits Nutrition 0.000 claims 1
- 230000005856 abnormality Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 54
- 239000003463 adsorbent Substances 0.000 description 5
- 230000004888 barrier function Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000009422 external insulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005979 thermal decomposition reaction Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- -1 moisture Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
- H01F2027/406—Temperature sensor or protection
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Locating Faults (AREA)
Abstract
The invention discloses a kind of converter transformer valve-side sleeve overheating fault monitoring devices, including SO2Detecting head, processing module, battery, gsm module and mobile terminal, battery are used for SO2Detecting head and processing module power supply, SO2Detecting head is directly installed on by the flange opening on value side bushing gas chamber in the gas chamber of value side bushing, for detecting in gas chamber whether have SO2Gas；Processing module is mounted on value side bushing outer wall, with SO2Detecting head is connected by cable, and is established and communicated to connect by gsm module and mobile terminal, testing result is sent to mobile terminal by gsm module, mobile terminal receives the position that testing result carries out failure judgement casing.Converter transformer valve-side sleeve overheating fault monitoring device of the present invention, for realizing the monitoring of converter transformer valve-side sleeve overheating fault, and abnormality is reported to operation maintenance personnel in time, foundation is provided for the trouble hunting of value side bushing, so that operation maintenance personnel is known the position of failure value side bushing in time, carries out O＆M maintenance in time.
Description
Technical field
The present invention relates to converter transformer valve-side sleeve overheating fault monitoring technical field, specially a kind of converter power transformer
Value side bushing overheating fault monitoring device and monitoring method.
Background technology
Converter power transformer and its value side bushing be the change of current in AC and DC transmission system, two end interface of inversion important equipment,
Because it will bear AC field, DC electric field and the collective effect in magnetic field, it requires it with high reliability and high-tech
Performance.With the promotion of direct current transportation capacity and voltage class, compared to other primary equipments in current conversion station, value side bushing is more easy to send out
Raw failure, to value side bushing manufacture level and operational reliability, higher requirements are also raised for this.Converter transformer valve side sleeve is being transported
During row, space charge accumulation between insulating layer under the effect of long-time DC voltage causes surrounding electric field to be distorted,
So that inside pipe casing field distribution is uneven and compares concentration in regional area, flashover, disruptive discharge or overheating fault easily occurs,
The safe operation generation of entire extra-high voltage DC transmission system is seriously threatened.
SF filled with 0.3-0.4MPa in the gas chamber of converter transformer valve side sleeve6Gas is to improve insulation performance.When valve side covers
There is hot-spot failure in pipe, when temperature reaches 300 DEG C, SF6It begins to obviously decompose, containing a large amount of in decomposition product
SO2、SOF2And CO2.When in gas chamber there are when moisture, SF6Decomposition rate faster, therefore pass through detect SF6Gas decompose production
Object can judge whether casing overheating fault occurs rapidly.
In view of the above problems, the overheating fault monitoring technology of converter transformer valve side sleeve has caused various aspects to include power grid fortune
The concern of row department.Application No. is 201410425092.8 and 201110406544.4 patents to propose detection SF respectively6Point
Solve the chromatogram analysis method of product and a kind of SF6The detection device of gas decomposition product.However it would generally be put in the gas chamber of casing
A certain amount of adsorbent is set to absorb the impurity such as moisture, oxygen, adsorbent can also absorb SO simultaneously2、SOF2And CO2Equal SF6Point
Solve product.The above method be all between the sampling analysis from equipment gas chamber at regular intervals, SO at this time2Equal decomposition products may be
Through being absorbed by adsorbent, so as to cause failing to judge.
Invention content
The present invention to solve the deficiencies in the prior art, provides a kind of on-Line Monitor Device, in value side bushing gas chamber
SF6Gas is measured in real time, to ensure that the converter transformer valve-side sleeve overheating fault of the accuracy of measurement result monitors
Device.
The present invention can be achieved through the following technical solutions：
A kind of converter transformer valve-side sleeve overheating fault monitoring device, it is characterised in that：Including SO2Detecting head, processing
Module, battery, gsm module and mobile terminal, the battery are used for SO2Detecting head and processing module power supply, the SO2Detection
Whether head is directly installed on by the flange opening on value side bushing gas chamber in the gas chamber of value side bushing, had for detecting in gas chamber
SO2Gas；The processing module is mounted on value side bushing outer wall, with SO2Detecting head is connected by cable, and passes through gsm module
It establishes and communicates to connect with mobile terminal, testing result is sent to mobile terminal by gsm module, the mobile terminal receives inspection
Result is surveyed to carry out judging casing abort situation.Converter transformer valve-side sleeve overheating fault monitoring device of the present invention, for realizing
The monitoring of converter transformer valve-side sleeve overheating fault, and in time report abnormality to operation maintenance personnel, it is value side bushing
Trouble hunting provides foundation, and operation maintenance personnel is enable to know the position of failure value side bushing in time, carries out O＆M maintenance in time.
Further, the SO2Detecting head is for monitoring SF in converter transformer valve-side sleeve gas chamber6Under overheating fault
Decomposition product SO2.The present invention is to pass through SO2Detecting head is monitored the indoor SO of value side bushing gas2Gas carries out knowing valve side
The overheating fault situation of casing.
Further, the processing module has independent device coding, including signal acquisition circuit, amplifying circuit and letter
Number processing circuit, works as SO2Detecting head, which detects, there is SO in gas chamber2When gas, testing result is passed through gsm module by processing module
It is sent to mobile terminal.
Further, the processing module further includes timer.
Further, the SO2The operating temperature range of detecting head be -40 DEG C to 120 DEG C, measurement range be 0ppm extremely
500ppm, measurement accuracy 1ppm.
Further, the gsm module be one or two or it is multiple.
Further, the mobile terminal and one or two or the foundation communication connection of multiple gsm modules, according to reception
Device coding and testing result judge the position for the casing of overheating fault occur.
A kind of monitoring method using above-mentioned converter transformer valve-side sleeve overheating fault monitoring device, the monitoring method
It is that one kind passing through SO in detection value side bushing gas chamber2The content of gas, the method for finding the overheating fault of value side bushing in time.
Further, the monitoring method, includes the following steps,
The first step opens monitoring device, it is ensured that SO2Detecting head, processing module, gsm module and mobile terminal are started to work；
Second step, SO2Detecting head detects the indoor SO of value side bushing gas2Gas, and send the signal detected to processing
Module；
Third walks, and the processing module receives SO2After the detection signal of detecting head, judge whether there is SO in gas chamber2Gas
Body produces SO when detecting in gas chamber2After gas, processing module by gsm module to mobile terminal sending device coding and
Testing result；
4th step, the mobile terminal receive the device coding and testing result of processing module transmission, know generation event
The position of the casing of barrier reminds operation maintenance personnel to carry out O＆M maintenance to value side bushing.
Further, timer, the setting of the timer, in above-mentioned second step are additionally provided in above-mentioned monitoring device
SO2SO is not detected in detecting head2When gas, the processing module was sent once by gsm module to mobile terminal every 1 hour
Device coding illustrates that damage or current place occurs in the processing module if mobile terminal is more than not receive device coding in 1 hour
In down state, operation maintenance personnel is reminded to carry out repair and maintenance to processing module.
Converter transformer valve-side sleeve overheating fault monitoring device of the present invention has following advantageous effect：
The first, reliability is high, and the present invention is by detecting SF6Cross thermal decomposition product SO2It realizes to converter transformer valve side sleeve
The real-time monitoring of overheating fault, due to SO2Detecting head is directly detected gas in gas chamber, avoids set to greatest extent
Influence of the indoor adsorbent of pipe gas to gas componant, improves the reliability of testing result.
The second, monitoring in real time, maintenance is timely, SO in the present invention2Detecting head and processing module are whole with movement by gsm module
Communication connection is established at end, can be directly by device coding and detection when processing module judges that overheating fault occurs for value side bushing
As a result it is transmitted to mobile terminal, such as the mobile phone of operation maintenance personnel, operation maintenance personnel can formulate O＆M repair schedule accordingly.
SO in third, the present invention2Detecting head and processing module rely on battery powered, and pass through gsm module and mobile terminal
Communication connection is established, feed cable and communication cable are not necessarily to, by monitoring device to value side bushing and converter power transformer external insulation
Influence is preferably minimized.
4th, multiple gsm modules can be established with the same mobile terminal and be communicated to connect in the present invention, and operation maintenance personnel can be with
The device coding and testing result received according to mobile terminal judges that the position of overheating fault casing occurs rapidly.
Description of the drawings
Attached drawing 1 is the structural schematic diagram of converter transformer valve-side sleeve overheating fault monitoring device of the present invention.
Specific implementation mode
In order that those skilled in the art will better understand the technical solution of the present invention, with reference to embodiment and attached drawing
Product of the present invention is described in further detail.
As shown in Figure 1, a kind of converter transformer valve-side sleeve overheating fault monitoring device, including SO2Detecting head 1, processing
Module 2, battery 3, gsm module 4 and mobile terminal 5, the battery 3 are used for SO2Detecting head 1 and processing module 2 are powered, described
SO2Detecting head 1 is directly installed on by the flange opening on value side bushing gas chamber in the gas chamber of value side bushing, for detecting gas chamber
In whether have SO2Gas, the SO2The operating temperature range of detecting head 1 be -40 DEG C to 120 DEG C, measurement range be 0ppm extremely
500ppm, measurement accuracy 1ppm.The processing module 2 is mounted on value side bushing outer wall, with SO2Detecting head 1 passes through cable
Connection, and established and communicated to connect by gsm module 4 and mobile terminal 5, testing result is sent to movement eventually by gsm module 4
End 5, the mobile terminal 5 receive testing result and carry out judging casing abort situation.Converter transformer valve-side sleeve mistake of the present invention
Thermal fault monitoring device for realizing the monitoring of converter transformer valve-side sleeve overheating fault, and is in time reported abnormality
To operation maintenance personnel, foundation is provided for the trouble hunting of value side bushing, operation maintenance personnel is enable to know the position of value side bushing in time,
O＆M maintenance is carried out in time.The SO2Detecting head 1 is for monitoring SF in converter transformer valve-side sleeve gas chamber6Under overheating fault
Decomposition product SO2.The present invention is to pass through SO2Detecting head 1 is monitored the indoor SO of value side bushing gas2Gas carries out knowing valve
The overheating fault situation of side casing.The processing module 2 has independent device coding, including signal acquisition circuit, amplification electricity
Road and signal processing circuit, work as SO2Detecting head 1, which detects, there is SO in gas chamber2When gas, processing module 2 passes through testing result
Gsm module 4 is sent to mobile terminal 5.The processing module 2 further includes timer, the setting of the timer, above-mentioned second
SO in step2SO is not detected in detecting head 12When gas, the processing module 2 every 1 hour by gsm module 4 to mobile terminal 5
Primary equipment coding is sent, if mobile terminal 5 did not received device coding more than 1 hour, illustrates that damage occurs in the processing module 2
Badly or it is currently at down state, operation maintenance personnel is reminded to carry out repair and maintenance to processing module 2.
As shown in Figure 1, the gsm module 4 is multiple, multiple gsm modules 4 are established with the same mobile terminal 5 logical respectively
Letter connection, mobile terminal 5 judge the position for the casing for overheating fault occur according to the device coding and testing result received.When
So, the mobile terminal 5 in addition to can with multiple gsm modules 4 establish communication connection other than, can also respectively with a gsm module 4
Or two gsm modules 4 establish communication connection.
As shown in Figure 1, a kind of monitoring method using above-mentioned converter transformer valve-side sleeve overheating fault monitoring device, institute
It is that one kind passing through SO in detection value side bushing gas chamber to state monitoring method2The content of gas finds the overheat event of value side bushing in time
The method of barrier.Specifically, the monitoring method, includes the following steps,
The first step opens monitoring device, it is ensured that SO2Detecting head 1, processing module 2, gsm module 4 and mobile terminal 5 start
Work；
Second step, SO2Detecting head 1 detects the indoor SO of value side bushing gas2Gas, and send the signal detected to place
Manage module 2；
Third walks, and the processing module 2 receives SO2After the detection signal of detecting head 1, judge whether there is SO in gas chamber2Gas
Body produces SO when detecting in gas chamber2After gas, processing module 2 is encoded by gsm module 4 to 5 sending device of mobile terminal
And testing result；
4th step, the SO that the processing module 2 receives2SO is not detected in detecting head 12When gas, the processing module 2
Primary equipment coding is sent to mobile terminal 5 by gsm module 4 every 1 hour, is set if mobile terminal 5 did not received more than 1 hour
Standby coding then illustrates that the processing module 2 occurs damaging or being currently at down state, reminds operation maintenance personnel to processing module
2 carry out repair and maintenance.
5th step, the mobile terminal 5 receive the device coding and testing result of the transmission of processing module 2, know generation
The position of the casing of failure reminds operation maintenance personnel to carry out O＆M maintenance to value side bushing.
In conjunction with Fig. 1, the present invention is by detecting SF6Cross thermal decomposition product SO2It realizes and event is overheated to converter transformer valve side sleeve
The real-time monitoring of barrier, due to SO2Detecting head 1 is directly detected gas in gas chamber, avoids casing gas to greatest extent
Influence of the indoor adsorbent to gas componant, improves the reliability of testing result.SO in the present invention2Detecting head 1 and processing
Module 2 is established by gsm module 4 and mobile terminal 5 and is communicated to connect, when processing module 2 judges that overheating fault occurs for value side bushing
When, can device coding and testing result be directly transmitted to mobile terminal 5, such as the mobile phone of operation maintenance personnel, operation maintenance personnel can be accordingly
Formulate O＆M repair schedule.SO in the present invention2Detecting head 1 and processing module 2 are powered by battery 3, and by gsm module 4 with
Mobile terminal 5 establishes communication connection, feed cable and communication cable is not necessarily to, by monitoring device to value side bushing and converter power transformer
The influence of external insulation is preferably minimized.Multiple gsm modules 4 can be established with the same mobile terminal 5 and be communicated to connect in the present invention, fortune
The device coding and testing result that dimension personnel can receive according to mobile terminal 5 judge that the position of overheating fault casing occurs rapidly
It sets.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the present invention in any form；It is all
The those of ordinary skill of the industry can be shown in by specification attached drawing and described above and swimmingly implement the present invention；But it is all
Those skilled in the art without departing from the scope of the present invention, using disclosed above technology contents
The equivalent variations for a little variation, modification and evolution made are the equivalent embodiment of the present invention；Meanwhile it is all according to the present invention
Substantial technological to the variation, modification and evolution etc. of any equivalent variations made by above example, still fall within the present invention's
Within the protection domain of technical solution.
Claims (10)
1. a kind of converter transformer valve-side sleeve overheating fault monitoring device, it is characterised in that：Including SO2Detecting head, processing mould
Block, battery, gsm module and mobile terminal, the SO2Detecting head is directly installed on by the flange opening on value side bushing gas chamber
In the gas chamber of value side bushing, for detecting in gas chamber whether have SO2Gas；The processing module is mounted on value side bushing outer wall
On, with SO2Detecting head is connected by cable, and is established and communicated to connect by gsm module and mobile terminal, and testing result is passed through
Gsm module is sent to mobile terminal, and the mobile terminal receives the position that testing result carries out failure judgement casing.
2. converter transformer valve-side sleeve overheating fault monitoring device according to claim 1, it is characterised in that：The SO2
Detecting head is for monitoring SF in converter transformer valve-side sleeve gas chamber6Decomposition product SO under overheating fault2。
3. converter transformer valve-side sleeve overheating fault monitoring device according to claim 2, it is characterised in that：The place
Managing module has independent device coding, including signal acquisition circuit, amplifying circuit and signal processing circuit, works as SO2Detecting head
Detect occur SO in gas chamber2When gas, testing result is sent to mobile terminal by processing module by gsm module.
4. converter transformer valve-side sleeve overheating fault monitoring device according to claim 3, it is characterised in that：The place
It further includes timer to manage module.
5. converter transformer valve-side sleeve overheating fault monitoring device according to claim 4, it is characterised in that：The SO2
The operating temperature range of detecting head is -40 DEG C to 120 DEG C, and measurement range is 0ppm to 500ppm, measurement accuracy 1ppm.
6. according to the converter transformer valve-side sleeve overheating fault monitoring device described in any one of claim 1 to 5 claim,
It is characterized in that：The gsm module be one or two or it is multiple.
7. converter transformer valve-side sleeve overheating fault monitoring device according to claim 6, it is characterised in that：The shifting
Dynamic terminal and one or two or the foundation communication connection of multiple gsm modules, judge according to the device coding of reception and testing result
There is the position of the casing of overheating fault.
8. a kind of utilizing converter transformer valve-side sleeve overheating fault monitoring dress described in any one of claim 3 to 7 claim
The monitoring method set, it is characterised in that：The monitoring method is a kind of by detecting SO in value side bushing gas chamber2Gas contains
Amount, the method for finding the overheating fault of value side bushing in time.
9. the monitoring method of converter transformer valve-side sleeve overheating fault monitoring device according to claim 8, feature
It is：Include the following steps,
The first step opens monitoring device, it is ensured that SO2Detecting head, processing module, gsm module and mobile terminal are started to work；
Second step, SO2Detecting head detects the indoor SO of value side bushing gas2Gas, and send the signal detected to processing mould
Block；
Third walks, and the processing module receives SO2After the detection signal of detecting head, judge whether there is SO in gas chamber2Gas, when
It detects and produces SO in gas chamber2After gas, processing module is encoded and is detected to mobile terminal sending device by gsm module and tied
Fruit；
4th step, the mobile terminal receive the device coding and testing result of processing module transmission, know and break down
The position of casing reminds operation maintenance personnel to carry out O＆M maintenance to value side bushing.
10. the monitoring method of converter transformer valve-side sleeve overheating fault monitoring device according to claim 9, feature
It is：The setting of the timer, the SO in above-mentioned second step2SO is not detected in detecting head2When gas, the processing module is every
Primary equipment coding is sent to mobile terminal by gsm module every 1 hour, if mobile terminal is more than not receive within 1 hour equipment volume
Code then illustrates that the processing module occurs damaging or being currently at down state, operation maintenance personnel is reminded to carry out processing module
Repair and maintenance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810437818.8A CN108511173A (en) | 2018-05-09 | 2018-05-09 | A kind of converter transformer valve-side sleeve overheating fault monitoring device and monitoring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810437818.8A CN108511173A (en) | 2018-05-09 | 2018-05-09 | A kind of converter transformer valve-side sleeve overheating fault monitoring device and monitoring method |
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| Publication Number | Publication Date |
|---|---|
| CN108511173A true CN108511173A (en) | 2018-09-07 |
Family
ID=63400188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810437818.8A Pending CN108511173A (en) | 2018-05-09 | 2018-05-09 | A kind of converter transformer valve-side sleeve overheating fault monitoring device and monitoring method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112698165A (en) * | 2020-12-16 | 2021-04-23 | 中国科学院电工研究所 | Converter transformer valve side sleeve fault detection device |
| CN117629313A (en) * | 2024-01-26 | 2024-03-01 | 南京中鑫智电科技有限公司 | On-line monitoring method and system for oil expansion of converter transformer valve side sleeve |
| CN117706943A (en) * | 2024-02-06 | 2024-03-15 | 南京中鑫智电科技有限公司 | Self-adaptive control method and system for converter transformer valve side sleeve end screen voltage divider |
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| CN208225692U (en) * | 2018-05-09 | 2018-12-11 | 国网内蒙古东部电力有限公司 | A kind of converter transformer valve-side sleeve overheating fault monitoring device |
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- 2018-05-09 CN CN201810437818.8A patent/CN108511173A/en active Pending
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| CN101782614A (en) * | 2010-02-20 | 2010-07-21 | 中国科学院电工研究所 | Device for detecting breakdown of sulfur hexafluoride gas-insulated electrical equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112698165A (en) * | 2020-12-16 | 2021-04-23 | 中国科学院电工研究所 | Converter transformer valve side sleeve fault detection device |
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| CN117629313A (en) * | 2024-01-26 | 2024-03-01 | 南京中鑫智电科技有限公司 | On-line monitoring method and system for oil expansion of converter transformer valve side sleeve |
| CN117629313B (en) * | 2024-01-26 | 2024-04-05 | 南京中鑫智电科技有限公司 | On-line monitoring method and system for oil expansion of converter transformer valve side sleeve |
| CN117706943A (en) * | 2024-02-06 | 2024-03-15 | 南京中鑫智电科技有限公司 | Self-adaptive control method and system for converter transformer valve side sleeve end screen voltage divider |
| CN117706943B (en) * | 2024-02-06 | 2024-04-16 | 南京中鑫智电科技有限公司 | Self-adaptive control method and system for converter transformer valve side sleeve end screen voltage divider |
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