CN112630643B - Device and method for monitoring state of top cover of converter transformer on-load voltage regulating switch - Google Patents
Device and method for monitoring state of top cover of converter transformer on-load voltage regulating switch Download PDFInfo
- Publication number
- CN112630643B CN112630643B CN202011467570.3A CN202011467570A CN112630643B CN 112630643 B CN112630643 B CN 112630643B CN 202011467570 A CN202011467570 A CN 202011467570A CN 112630643 B CN112630643 B CN 112630643B
- Authority
- CN
- China
- Prior art keywords
- top cover
- regulating switch
- real
- strain
- monitoring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000012544 monitoring process Methods 0.000 title claims abstract description 50
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000001133 acceleration Effects 0.000 claims abstract description 21
- 238000005259 measurement Methods 0.000 claims abstract description 8
- 239000002184 metal Substances 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000012806 monitoring device Methods 0.000 abstract description 3
- 230000008054 signal transmission Effects 0.000 abstract description 2
- 230000008859 change Effects 0.000 description 4
- 230000001052 transient effect Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The invention discloses a device and a method for monitoring the state of a top cover of a converter transformer on-load voltage regulating switch. The monitoring device is independent of a power network, less interference is caused to measurement and signal transmission, and no harmonic wave is injected into the power system. The invention has the advantages of simple structure, easy realization, reliability, high efficiency and the like. The application of the invention has important engineering practical significance for the converter transformer operator to acquire the vibration acceleration and top cover deformation data of the oil chamber of the voltage regulating switch accurately and reliably in real time and evaluate the safe running state of the converter transformer.
Description
Technical Field
The invention belongs to the field of power equipment monitoring, and relates to a device and a method for monitoring the state of a top cover of a converter transformer on-load voltage regulating switch, which are used for monitoring, analyzing, diagnosing and recording the deformation state characteristics of the top cover of the converter transformer voltage regulating switch so as to evaluate the voltage regulating switch and the converter transformer running state.
Background
The safe operation of the power grid is the basis for ensuring continuous and stable power supply, and is also the guarantee of the safety of the power grid. With the rapid development of ultra-high voltage direct current transmission engineering, the operation of a power grid has raised higher requirements on the safety and reliability of power transmission and transformation equipment. Unlike ac components in a system, failure of dc critical equipment typically results in partial loss of dc power, and power imbalance will cause frequency, voltage fluctuations in the transmitting and receiving end systems. As the extra-high voltage direct current transmission power is larger, the influence of direct current faults on the operation of an alternating current system is more serious.
The converter transformer is used as core equipment for converting and transmitting energy of a converter station, and economic direct loss (including equipment loss and electric quantity loss) caused by faults and indirect loss caused by power failure are huge, so that the converter transformer becomes a key and important influencing factor of the faults of a transformer substation and the converter station. In 2017, a large number of serious converter transformer firing accidents continuously occur in China, and part of transformer equipment is destroyed due to the accidents, so that bad influence and great economic loss are caused. In these accidents, the pressure regulating switch top cover is broken and exploded due to sudden rise of fault oil pressure in the oil chamber, so that a device and a method for monitoring deformation state of the pressure regulating switch top cover are urgently needed.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide a device and a method for monitoring the state of a top cover of a converter transformer on-load voltage regulating switch.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the device for monitoring the state of the top cover of the converter transformer on-load voltage regulating switch comprises a vibration starting unit and a strain monitoring unit, wherein the vibration starting unit is arranged on the top cover of the converter transformer voltage regulating switch and comprises a high-frequency acceleration sensor, the strain monitoring unit comprises a strain sensor, and the strain monitoring unit is further connected with an alarm unit.
The method for monitoring the state of the top cover of the converter transformer on-load voltage regulating switch comprises the following steps:
step 3: measuring the deformation of the top cover in real time to obtain real-time strain characteristic quantity;
step 4: judging whether the real-time strain characteristic quantity exceeds a strain monitoring threshold value, if so, entering a step 5, otherwise, returning to the step 1;
step 5: and (5) sending out an alarm signal and returning to the step (1).
The invention further improves that the vibration at the top of the pressure regulating switch oil chamber is measured in real time through a high-frequency acceleration sensor arranged at the top of the pressure regulating switch.
The invention further improves that the deformation of the top cover is measured in real time through the strain sensor arranged on the top cover of the voltage regulating switch.
The invention is further improved in that the strain monitoring unit is used for judging whether the real-time strain characteristic quantity exceeds the strain monitoring threshold value.
A further improvement of the invention is that the alarm signal is issued by an alarm unit.
The invention is further improved in that the vibration start threshold is 0.5 times the pressure release valve actuation threshold.
The invention is further improved in that the strain monitoring threshold value is 0.8 times of the yield strain of the metal material of the voltage regulating switch top cover.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the transient vibration change characteristics of the top of the oil chamber of the voltage regulating switch are measured through the high-frequency acceleration sensor, the deformation characteristics of the metal top cover are measured through the strain sensor arranged on the metal top cover of the voltage regulating switch, and the requirements of high temperature, greasy dirt and strong electromagnetic environment in the converter transformer can be met no matter from the precision or the application range. The strain monitoring unit is directly arranged on the metal top cover, so that the deformation change characteristic of the metal top cover can be perceived quickly. By measuring and analyzing the acceleration of the oil chamber of the voltage regulating switch and the transient state characteristics of the strain of the top cover, the real-time monitoring of the deformation state of the metal top cover of the voltage regulating switch is realized, the occurrence of explosion accidents of the top cover caused by the reduction of the mechanical property due to the residual deformation or fatigue of the top cover can be effectively reduced, the accident of explosion of the oil chamber is prevented, and the operation safety of the converter transformer is greatly improved. The monitoring device is independent of a power network, less interference is caused to measurement and signal transmission, and no harmonic wave is injected into the power system. The invention has the advantages of simple structure, easy realization, reliability, high efficiency and the like.
In the invention, during monitoring, the transient vibration at the top of the pressure regulating switch oil chamber is monitored and analyzed through the vibration starting unit, so as to avoid false alarm caused by shaking of the top cover due to the action of the mechanical operating mechanism. By comparing with a preset vibration starting threshold, the rapid and reliable starting under fault vibration is realized. The strain monitoring unit can rapidly sense the deformation change characteristics of the top cover, and real-time monitoring and evaluation of the deformation state of the top cover are realized by comparing the deformation change characteristics with a preset threshold value. The application of the invention has important engineering practical significance for the converter transformer operator to acquire the vibration acceleration and top cover deformation data of the oil chamber of the voltage regulating switch accurately and reliably in real time and evaluate the safe running state of the converter transformer. The device can reliably operate for a long time, is not influenced by strong electromagnetic and greasy dirt environments, has the advantages of high response speed and high measurement frequency, and does not inject harmonic waves into a power system in the operation process and influence the normal operation of primary and secondary equipment in a transformer substation.
Drawings
Fig. 1 is a schematic diagram of a device for monitoring the state of a top cover of a converter transformer on-load voltage regulating switch.
Fig. 2 is a logic flow diagram of the present invention.
In the figure, 1 is converter transformer, 2 is voltage regulating switch, 3 is top cover, 4 is conservator, 5 is vibration starting unit, 6 is strain monitoring unit, and 7 is alarm unit.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1, the device for monitoring the state of the top cover of the converter transformer on-load voltage regulating switch comprises a vibration starting unit 5 and a strain monitoring unit 6, wherein the vibration starting unit 5 and the strain monitoring unit 6 are arranged on the top cover 3 of the converter transformer 1 voltage regulating switch 2, the vibration starting unit 5 comprises a high-frequency acceleration sensor, the strain monitoring unit 6 comprises a strain sensor, the strain monitoring unit 6 is further connected with an alarm unit 7, and a conservator 4 is arranged on one side of the converter transformer 1. The top cover 3 is a metal top cover.
Referring to fig. 2, the method for monitoring the state of the top cover of the converter transformer on-load voltage regulating switch comprises the following steps:
step 1: after the device is electrified and started, a preset vibration starting threshold value a is read set And a strain monitoring threshold value epsilon set 。
Step 2: real-time measurement is carried out on the vibration of the top of the oil chamber of the pressure regulating switch by utilizing a high-frequency acceleration sensor arranged at the top of the pressure regulating switch 2, and the real-time acceleration characteristic quantity a is obtained by measurement cv (t)；
Step 3: judging real-time acceleration characteristic quantity a by vibration starting unit cv (t) whether or not the vibration start threshold value a is exceeded set I.e. whether the vibration start criterion a is met cv (t)≥a set . If yes, entering step 4, otherwise returning to step 2;
step 4: real-time measurement of deformation of the metal top cover 3 is carried out by utilizing a strain sensor arranged on the metal top cover 3 of the voltage regulating switch, and real-time strain characteristic quantity epsilon is obtained by measurement cv (t)；
Step 5: real-time strain characteristic quantity epsilon is judged by a strain monitoring unit cv (t) whether the strain monitoring threshold ε is exceeded set I.e. whether the strain warning criterion epsilon is met cv (t)≥ε set . If yes, entering step 6, otherwise returning to step 2;
step 6: and 2, sending out an alarm signal through an alarm unit in a wired and wireless mode, simultaneously storing transient vibration and top cover strain data of 500ms before and after alarm, and finally returning to the step 2.
The invention is further improved in that the vibration starting threshold value a is calculated according to a large number of field tests, operation experience and theory set The pressure release valve is set according to 0.5 times of the action threshold value of the installed pressure release valve so as to ensure the accuracy and the rapidity of the starting unit.
The invention is further improved in that the strain monitoring threshold value epsilon is based on a large number of field tests, operation experience and theoretical calculation results set The stress is set according to 0.8 times of the yield strain of the metal material of the top cover of the voltage regulating switch so as to ensure that possible material fatigue is accurately reflected.
The invention combines and reasonably matches the vibration starting unit 5, the strain monitoring unit 6, the alarm unit 7 and other three parts, so that the whole monitoring device and the method have the advantages of simple structure, easy realization, correctness, high efficiency and the like, and can be directly realized on equipment by programming.
While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (5)
1. The device for monitoring the state of the top cover of the converter transformer on-load voltage regulating switch is characterized by comprising a vibration starting unit (5) and a strain monitoring unit (6) which are arranged on the top cover (3) of the converter transformer voltage regulating switch, wherein the vibration starting unit (5) comprises a high-frequency acceleration sensor, the strain monitoring unit (6) comprises a strain sensor, the strain monitoring unit (6) is also connected with an alarm unit (7), and the strain monitoring unit is arranged on the metal top cover; the method comprises the steps that real-time measurement is carried out on the top vibration of a pressure regulating switch oil chamber through a high-frequency acceleration sensor, and real-time acceleration characteristic quantity is obtained; judging whether the real-time acceleration characteristic quantity exceeds a vibration starting threshold value, and if so, obtaining a real-time strain characteristic quantity by measuring the deformation of the top cover in real time; and judging whether the real-time strain characteristic quantity exceeds a strain monitoring threshold value, if so, sending an alarm signal, otherwise, measuring the vibration of the top of the pressure regulating switch oil chamber in real time through a high-frequency acceleration sensor to realize the state monitoring of the top cover of the converter transformer on-load pressure regulating switch.
2. The method for monitoring the state of the top cover of the converter transformer on-load voltage regulating switch is characterized by comprising the following steps of:
step 1, measuring the vibration of the top of a pressure regulating switch oil chamber in real time through a high-frequency acceleration sensor arranged at the top of the pressure regulating switch to obtain real-time acceleration characteristic quantity;
step 2, judging whether the real-time acceleration characteristic quantity exceeds a vibration starting threshold value, if so, entering a step 3, otherwise, returning to the step 1; the vibration starting threshold value is 0.5 times of the action threshold value of the pressure release valve;
step 3: the deformation of the top cover is measured in real time through the top cover installed on the voltage regulating switch, so that real-time strain characteristic quantity is obtained;
step 4: judging whether the real-time strain characteristic quantity exceeds a strain monitoring threshold value, if so, entering a step 5, otherwise, returning to the step 1; the strain monitoring threshold value is 0.8 times of the yield strain of the metal material of the voltage regulating switch top cover;
step 5: and (5) sending out an alarm signal and returning to the step (1).
3. The method for monitoring the state of the top cover of the converter transformer on-load voltage regulating switch according to claim 2, wherein the vibration starting unit is used for judging whether the real-time acceleration characteristic quantity exceeds a vibration starting threshold value.
4. The method for monitoring the state of the top cover of the converter transformer on-load voltage regulating switch according to claim 2, wherein the strain monitoring unit is used for judging whether the real-time strain characteristic quantity exceeds a strain monitoring threshold value.
5. The method for monitoring the state of the top cover of the converter transformer on-load voltage regulating switch according to claim 2, wherein the alarm signal is sent out through an alarm unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011467570.3A CN112630643B (en) | 2020-12-14 | 2020-12-14 | Device and method for monitoring state of top cover of converter transformer on-load voltage regulating switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011467570.3A CN112630643B (en) | 2020-12-14 | 2020-12-14 | Device and method for monitoring state of top cover of converter transformer on-load voltage regulating switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112630643A CN112630643A (en) | 2021-04-09 |
| CN112630643B true CN112630643B (en) | 2023-04-28 |
Family
ID=75312941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011467570.3A Active CN112630643B (en) | 2020-12-14 | 2020-12-14 | Device and method for monitoring state of top cover of converter transformer on-load voltage regulating switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112630643B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114440783B (en) * | 2021-12-31 | 2023-03-31 | 西安交通大学 | Transformer oil tank body deformation monitoring device and method |
| CN114446598B (en) * | 2021-12-31 | 2024-07-16 | 西安交通大学 | Converter transformer protection device and method based on strain characteristics of explosion-proof material |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478985A (en) * | 2017-08-21 | 2017-12-15 | 河海大学常州校区 | On-load tap changers of transformers state on_line monitoring device and its monitoring method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103199621B (en) * | 2013-03-07 | 2015-11-11 | 国家电网公司 | The networking of power transformer of intelligent substation on-line monitoring |
| CN110061473B (en) * | 2019-05-07 | 2021-09-07 | 北京中瑞和电气有限公司 | Digital protection device and method for transformer based on pressure single quantity information |
| CN110086257B (en) * | 2019-05-07 | 2020-10-27 | 西安交通大学 | Digital gas protection and oil flow surge monitoring integrated device and method for transformer |
| CN110174137B (en) * | 2019-05-07 | 2020-06-19 | 西安交通大学 | Monitoring method of transformer monitoring device based on non-electric quantity comprehensive characteristic information |
| CN110057443B (en) * | 2019-05-07 | 2021-04-27 | 北京中瑞和电气有限公司 | Transformer online monitoring device and method based on transient acceleration characteristics |
| CN111123056A (en) * | 2019-12-25 | 2020-05-08 | 中国电力科学研究院有限公司 | On-load voltage regulating switch short circuit electrical safety detection device and detection method |
-
2020
- 2020-12-14 CN CN202011467570.3A patent/CN112630643B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478985A (en) * | 2017-08-21 | 2017-12-15 | 河海大学常州校区 | On-load tap changers of transformers state on_line monitoring device and its monitoring method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112630643A (en) | 2021-04-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112701660B (en) | Integrated device and method for monitoring and protecting deformation of top cover of on-load voltage regulating switch | |
| KR102219090B1 (en) | Fault estimation diagnosis system of generator | |
| WO2020224553A1 (en) | Transformer monitoring apparatus and method based on non-electric-quantity comprehensive characteristic information | |
| CN112630643B (en) | Device and method for monitoring state of top cover of converter transformer on-load voltage regulating switch | |
| CN112635214B (en) | Converter transformer on-load voltage regulation switch top cover deformation protection device and method | |
| CN103323771B (en) | High-voltage breaker mechanical characteristic fault probability monitoring method and system based on on-line monitoring | |
| CN106249076B (en) | Distribution transformer condition detection method and system under the influence of by harmonic load | |
| CN103513139A (en) | Power transformer fault intelligent diagnosis technology, method and device | |
| Gockenbach et al. | Condition monitoring and diagnosis of power transformers | |
| CN109980602B (en) | Digital self-adaptive protection device and method for transformer based on pressure characteristics | |
| CN110018328B (en) | Power transformer on-line monitoring device and method based on transient oil flow characteristics | |
| CN111077362A (en) | Method and system for online monitoring running state of reactor in capacitor assembly | |
| CN110086257B (en) | Digital gas protection and oil flow surge monitoring integrated device and method for transformer | |
| CN106990305A (en) | The dry-type air-core reactor on-line monitoring method of high-voltage power capacitor complexes | |
| CN104076245A (en) | On-line monitoring device for contact network insulation | |
| CN212031587U (en) | Reactor running state on-line monitoring system in power capacitor complete equipment | |
| CN114354166A (en) | Intelligent high-voltage circuit breaker energy storage spring online monitoring method and system | |
| CN110112706B (en) | Transformer digital protection device and method based on pressure full information | |
| CN111707352A (en) | Real-time monitoring method for vibration noise of transformer | |
| CN112782545A (en) | Method for testing partial discharge of generator | |
| CN216718523U (en) | Leakage current method high tension switchgear insulating ability on-line monitoring system | |
| CN201569642U (en) | Post insulator crack detection system based on vibration and acoustics | |
| CN111650546B (en) | Online monitoring system and method for effectively preventing explosion of voltage transformer | |
| CN117767577B (en) | Power failure monitoring system based on current and voltage measurement | |
| CN215894810U (en) | Cable one-stop type diagnosis system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |