CN105206381B - Intelligent power saving increase-volume distribution transformer and monitoring method - Google Patents
Intelligent power saving increase-volume distribution transformer and monitoring method Download PDFInfo
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- CN105206381B CN105206381B CN201510689617.3A CN201510689617A CN105206381B CN 105206381 B CN105206381 B CN 105206381B CN 201510689617 A CN201510689617 A CN 201510689617A CN 105206381 B CN105206381 B CN 105206381B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 71
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Abstract
The present invention relates to a kind of intelligent power saving increase-volume distribution transformer, its high-voltage leading-out wire built-in voltage and current transformer is arranged on the high-pressure side of distribution transformer body；Low pressure lead-out wire built-in voltage and current transformer are arranged on the low-pressure side of distribution transformer body；Sunshine recorder is arranged on the top of distribution transformer body housing；Transformer oil level and oil temperature sensor are mounted on the madial wall of the oil tank of transformer of distribution transformer bodies top；Intelligent monitoring terminal is arranged on the side wall of distribution transformer body housing, and the signal output part of high-voltage leading-out wire built-in voltage and current transformer, low pressure lead-out wire built-in voltage and current transformer, sunshine recorder and transformer oil level and oil temperature sensor is all connected with intelligent monitoring terminal.The present invention can realize real-time monitoring running state and environmental condition monitoring, and the running status of transformer is judged.
Description
Technical field
The present invention relates to transmission ＆ distribution electro-technical field, and in particular to a kind of intelligent power saving increase-volume distribution transformer and monitoring side
Method.
Background technology
Distribution transformer is the key equipment in power system.The intelligent journey of controller switching equipment in current most of community of China
Degree is relatively low, and monitoring running state equipment is few, and information transmission channel lacks, and traditional equipment periodic inspection mode is still used at present,
Although contributing to failure early stage to diagnose, this mode has been simply to ensure that the safe operation of equipment, has not possessed good economy
Property, and the lifting required with the development of China's power grid construction, the rising of power consumption and user the quality of power supply, overhaul people
The workload of member is into the trend gradually increased, above-mentioned traditional periodic inspection mode, expends a large amount of manpower and materials, reduces work
Efficiency.
The content of the invention
It is an object of the invention to provide a kind of intelligent power saving increase-volume distribution transformer and monitoring method, the transformer can be real
Now real-time monitoring running state and environmental condition monitoring, and judge the running status of transformer.
In order to solve the above technical problems, a kind of intelligent power saving increase-volume distribution transformer disclosed by the invention, intelligent power saving increases
Holding distribution transformer includes distribution transformer body, it is characterised in that：Intelligent power saving increase-volume distribution transformer also draws including high pressure
Outlet built-in voltage and current transformer, low pressure lead-out wire built-in voltage and current transformer, sunshine recorder, transformer oil level
And oil temperature sensor and intelligent monitoring terminal, wherein, the high-voltage leading-out wire built-in voltage and current transformer are arranged on distribution
The high-pressure side of transformer body, for monitoring the on high-tension side real-time voltage value of distribution transformer body and current value；
The low pressure lead-out wire built-in voltage and current transformer are arranged on the low-pressure side of distribution transformer body, low pressure
Lead-out wire built-in voltage and current transformer are used for the real-time voltage value and current value for monitoring distribution transformer body low-pressure side；
The sunshine recorder is arranged on the top of distribution transformer body housing, and sunshine recorder is used to monitor distribution change
The real-time sunshine heat of depressor body；
The transformer oil level and oil temperature sensor are mounted on the oil tank of transformer of distribution transformer bodies top
On madial wall, transformer oil level and oil temperature sensor are used to monitor the oil temperature and oil level in oil tank of transformer；
The intelligent monitoring terminal is arranged on the side wall of distribution transformer body housing, the high-voltage leading-out wire in-built electrical
Pressure and current transformer, low pressure lead-out wire built-in voltage and current transformer, sunshine recorder and transformer oil level and oil temperature are passed
The signal output part of sensor is all connected with the signal input part of intelligent monitoring terminal.
A kind of monitoring method of above-mentioned intelligent power saving increase-volume distribution transformer, comprises the following steps：
Step 1：The transformer oil level and oil temperature sensor measure the real-time transformer oil temperature of distribution transformer body
tBecome, environment temperature t in real time around environment temperature sensor measurement distribution transformer bodyRing, the survey of surrounding air density sensor
Measure real-time surrounding air density p around distribution transformer body, surrounding air specific heat at constant pressure measuring instrument measurement distribution transformer
Real-time ambient wind around real-time pressurization by compressed air specific heat c around body, ambient wind velocity sensor measurement distribution transformer body
Fast Q, sunshine recorder measures the real-time sunshine heat Φ of distribution transformer bodyDay, meanwhile, transformer oil level and oil temperature sensing
Device, environment temperature sensor, surrounding air density sensor, surrounding air specific heat at constant pressure measuring instrument, ambient wind velocity sensor and
Sunshine recorder is respectively by transformer oil temperature tBecome, environment temperature tRing, surrounding air density p, pressurization by compressed air specific heat c, ambient wind
Fast Q and sunshine heat ΦDayIt is transferred to intelligent monitoring terminal；
Step 2：Intelligent monitoring terminal is according to transformer oil temperature t obtained aboveBecome, environment temperature tRing, surrounding air it is close
ρ, pressurization by compressed air specific heat c and ambient wind velocity Q are spent, formula Φ is utilizedDissipate=ρ cQ (tBecome-tRing) distribution transformer body is calculated because of wind speed
Influence the heat given out；
Step 3：The transformer oil temperature t obtained when intelligent monitoring terminalBecomeDuring 85 DEG C of ＞, represent that distribution transformer body is non-
Normal duty is run；
The transformer oil temperature t obtained when intelligent monitoring terminalBecomeDuring 70 DEG C of ＜, represent that distribution transformer body is normally born
Lotus runs；
70 DEG C≤the t of transformer oil temperature obtained when intelligent monitoring terminalBecomeAt≤85 DEG C, Φ is further calculatedDayWith distribution
The heat Φ that transformer body gives out by air speed influenceDissipateBetween difference, work as ΦDay-ΦDissipateIllustrate solar radiation distribution when >=0
Transformer body is normally run；
Work as ΦDay-ΦDissipateIllustrating the heat of sunshine during ＜ 0 can be blazed abroad by air flow, and distribution transformer body is just
Often operation.
Beneficial effects of the present invention：
The present invention can realize real-time monitoring running state and environmental condition monitoring, and the running status of transformer is carried out
Judge, the mode of relatively conventional manual inspection, the present invention greatly improves the monitoring efficiency of running state of transformer, and
The result of running state of transformer monitoring is more accurate, facilitates operation maintenance personnel to the on-call maintenance of failure transformer, is conducive to carrying
The service life of high transformer.After the present invention, operation maintenance personnel can be on the basis of distribution transformer safety be ensured, increase is matched somebody with somebody
Piezoelectric transformer maximum delivery power, reaches the purpose of dynamic compatibilization.
Brief description of the drawings
Fig. 1 is structured flowchart of the invention；
Fig. 2 is the structured flowchart of circuit part of the present invention
Wherein, 1-high-voltage leading-out wire built-in voltage and current transformer, 2-low pressure lead-out wire built-in voltage and electric current are mutual
Sensor, 3-GPS location equipment, 4-sunshine recorder, 5-transformer oil level and oil temperature sensor, 6-intelligent monitoring terminal,
7-distribution transformer body, 8-oil tank of transformer, 9-environment temperature sensor, 10-ambient pressure sensor, 11-environment
Air velocity transducer, 12-surrounding air density sensor, 13-surrounding air specific heat at constant pressure measuring instrument, the control of 14-remote subscriber
System.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail：
A kind of intelligent power saving increase-volume distribution transformer of the present invention, intelligent power saving increase-volume distribution transformer includes distribution transformer
Device body 7, high-voltage leading-out wire built-in voltage and current transformer 1, low pressure lead-out wire built-in voltage and current transformer 2, sunshine
Sensor 4, transformer oil level and oil temperature sensor 5 and intelligent monitoring terminal 6, wherein, the high-voltage leading-out wire built-in voltage and
Current transformer 1 is arranged on the high-pressure side of distribution transformer body 7, on high-tension side in real time for monitoring distribution transformer body 7
Magnitude of voltage and current value；
The low pressure lead-out wire built-in voltage and current transformer 2 are arranged on the low-pressure side of distribution transformer body 7, low pressure
Lead-out wire built-in voltage and current transformer 2 are used for the real-time voltage value and current value for monitoring the low-pressure side of distribution transformer body 7；
The sunshine recorder 4 is arranged on the top of the housing of distribution transformer body 7, and sunshine recorder 4 is matched somebody with somebody for monitoring
The real-time sunshine heat of piezoelectric transformer body 7；
The transformer oil level and oil temperature sensor 5 are mounted on the oil tank of transformer 8 at the top of distribution transformer body 7
Madial wall on, transformer oil level and oil temperature sensor 5 are used to monitor the oil temperature and oil level in oil tank of transformer 8；
The intelligent monitoring terminal 6 is arranged on the side wall of the housing of distribution transformer body 7, built in the high-voltage leading-out wire
Voltage and current transformer 1, low pressure lead-out wire built-in voltage and current transformer 2, sunshine recorder 4 and transformer oil level and oil
The signal output part of temperature sensor 5 is all connected with the signal input part of intelligent monitoring terminal 6.
In above-mentioned technical proposal, intelligent power saving increase-volume distribution transformer also includes GPS (Global Positioning
System, global positioning system) location equipment 3, the GPS location equipment 3 is installed in the top of the housing of distribution transformer body 7
Portion, the communication ends of the GPS location equipment 3 connect the GPS location data communication end of intelligent monitoring terminal 6.GPS location equipment 3
Distribution transformer present position can be monitored, when distribution transformer present position changes, the system can be reported
Warn and position distribution transformer present position.
In above-mentioned technical proposal, intelligent power saving increase-volume distribution transformer also includes peripheral meteorological data sensor, described outer
The signal output part for enclosing meteorological data sensor connects the environment weather data communication end of intelligent monitoring terminal 6.
In above-mentioned technical proposal, the peripheral meteorological data sensor includes environment temperature sensor 9, ambient pressure and sensed
Device 10 and ambient wind velocity sensor 11, the environment temperature sensor 9, ambient pressure sensor 10 and ambient wind velocity sensor 11
Signal output part be all connected with the environment weather data communication end of intelligent monitoring terminal 6.
In above-mentioned technical proposal, intelligent power saving increase-volume distribution transformer also includes surrounding air density sensor 12 and environment
Pressurization by compressed air heat capacity measurement unit 13, the signal of surrounding air density sensor 12 and surrounding air the specific heat at constant pressure measuring instrument 13
Output end is all connected with the environment weather data communication end of intelligent monitoring terminal 6.
In above-mentioned technical proposal, intelligent power saving increase-volume distribution transformer also includes remote subscriber control system 14, described remote
The communication ends of end subscriber control system 14 and the data communication end wireless communication connection of intelligent monitoring terminal 6.
Above-mentioned environment temperature sensor 9, ambient pressure sensor 10, ambient wind velocity sensor 11, surrounding air density are passed
Sensor 12 and surrounding air specific heat at constant pressure measuring instrument 13 are arranged at the environmental data collecting point around distribution transformer body 7
It is interior.The remote subscriber control system 14 is arranged in the operation maintenance personnel office of distal end.
In above-mentioned technical proposal, distribution transformer body 7 selects three dimensional wound core energy-efficient distribution transformer, selects three-dimensional winding
The reason for iron-core transformer is that three dimensional wound core transformer has open circuit loss low, stable magnetic field, the advantages of leakage field is few.Meet existing
Requirement of the modern society to energy-saving and emission-reduction.
The isallobaric device inherent parameters of voltage, electric current, oil temperature and external environment condition of the invention by measuring distribution transformer
The external parameters such as temperature, wind speed, intensity of sunshine, synthetic determination distribution transformer working capacity.So as to facilitate operation maintenance personnel to exist
Scheduling aspect improves distribution transformer maximum delivery power.
A kind of monitoring method of above-mentioned intelligent power saving increase-volume distribution transformer, it is characterised in that comprise the following steps：
Step 1：The real-time temperature of oil in transformer of the measurement distribution transformer of transformer oil level and oil temperature sensor 5 body 7
Spend tBecome, environment temperature t in real time around the measurement of environment temperature sensor 9 distribution transformer body 7Ring, surrounding air density sensing
Real-time surrounding air density p around the measurement distribution transformer of device 12 body 7, the measurement of surrounding air specific heat at constant pressure measuring instrument 13 is matched somebody with somebody
Around real-time pressurization by compressed air specific heat c around piezoelectric transformer body 7, the measurement distribution transformer of ambient wind velocity sensor 11 body 7
Real-time ambient wind velocity Q, the real-time sunshine heat Φ of the measurement distribution transformer of sunshine recorder 4 body 7Day, meanwhile, transformer oil
Position and oil temperature sensor 5, environment temperature sensor 9, surrounding air density sensor 12, surrounding air specific heat at constant pressure measuring instrument
13rd, ambient wind velocity sensor 11 and sunshine recorder 4 are respectively by transformer oil temperature tBecome, environment temperature tRing, surrounding air density
ρ, pressurization by compressed air specific heat c, ambient wind velocity Q and sunshine heat ΦDayIt is transferred to intelligent monitoring terminal 6；
Step 2：Intelligent monitoring terminal 6 is according to transformer oil temperature t obtained aboveBecome, environment temperature tRing, surrounding air it is close
ρ, pressurization by compressed air specific heat c and ambient wind velocity Q are spent, formula Φ is utilizedDissipate=ρ cQ (tBecome-tRing) distribution transformer body 7 is calculated because of wind speed
Influence the heat given out；
Step 3：The transformer oil temperature t obtained when intelligent monitoring terminal 6BecomeDuring 85 DEG C of ＞, distribution transformer body 7 is represented
Improper load operation；
The transformer oil temperature t obtained when intelligent monitoring terminal 6BecomeDuring 70 DEG C of ＜, represent that distribution transformer body 7 is normally negative
Lotus runs；
70 DEG C≤the t of transformer oil temperature obtained when intelligent monitoring terminal 6BecomeAt≤85 DEG C, Φ is further calculatedDayWith distribution
The heat Φ that transformer body 7 gives out by air speed influenceDissipateBetween difference, work as ΦDay-ΦDissipateIllustrate solar radiation distribution when >=0
Transformer body 7 is normally run, and now advises operation maintenance personnel to the close observation of transformer, and the reduction load fortune in conditions permit
OK；Work as ΦDay-ΦDissipateIllustrating the heat of sunshine during ＜ 0 can be blazed abroad by air flow, and distribution transformer body 7 is normally transported
OK.
In the step 1 of above-mentioned technical proposal, high-voltage leading-out wire built-in voltage and the monitoring distribution transformer sheet of current transformer 1
The on high-tension side real-time voltage value of body 7 and current value；Low pressure lead-out wire built-in voltage and the monitoring distribution transformer sheet of current transformer 2
The real-time voltage value and current value of the low-pressure side of body 7；Built in high-voltage leading-out wire built-in voltage and current transformer 1 and low pressure lead-out wire
Voltage and current transformer 2 are respectively by the on high-tension side real-time voltage value of distribution transformer body 7 and current value and distribution transformer
The real-time voltage value and current value of the low-pressure side of device body 7 are transferred to intelligent monitoring terminal 6；
In the step 3, when the on high-tension side real-time voltage value of distribution transformer body 7 and the reality of current value and low-pressure side
When magnitude of voltage and current value in there is a value not illustrate that distribution transformer body 7 is run in critical field set in advance, then
It is abnormal.
By above method, distribution transformer maximum delivery can be increased on the basis of distribution transformer safety is ensured
Power, reaches the purpose of dynamic compatibilization.
Also include step 4 after the step 3 of above-mentioned technical proposal：The intelligent monitoring terminal 6 transports distribution transformer body 7
Whether normal result is uploaded to remote subscriber control system 14 to row.
The unit that ambient temperature data unit measured by the present invention is uniformly used is degree Celsius (DEG C), measured wind speed
The unit that data unit is uniformly used is cubic meter (m per hour3/ h), the unit that measured insolation data unit is uniformly used
For kilojoule (kJ), the unit that measured distribution transformer inside oil temperature data unit is uniformly used is degree Celsius (DEG C).
The content that this specification is not described in detail belongs to prior art known to the professional operation maintenance personnel in this area.
Claims (5)
1. a kind of monitoring method of intelligent power saving increase-volume distribution transformer, intelligent power saving increase-volume distribution transformer includes distribution transformer
Device body (7), it is characterised in that：Intelligent power saving increase-volume distribution transformer also includes high-voltage leading-out wire built-in voltage and Current Mutual Inductance
Device (1), low pressure lead-out wire built-in voltage and current transformer (2), sunshine recorder (4), transformer oil level and oil temperature sensor
(5) and intelligent monitoring terminal (6), wherein, the high-voltage leading-out wire built-in voltage and current transformer (1) are arranged on distribution transformer
The high-pressure side of device body (7), for monitoring the on high-tension side real-time voltage value of distribution transformer body (7) and current value；
The low pressure lead-out wire built-in voltage and current transformer (2) are arranged on the low-pressure side of distribution transformer body (7), low pressure
Lead-out wire built-in voltage and current transformer (2) are used for the real-time voltage value and electricity for monitoring distribution transformer body (7) low-pressure side
Flow valuve；
The sunshine recorder (4) is arranged on the top of distribution transformer body (7) housing, and sunshine recorder (4) is used to monitor
The real-time sunshine heat of distribution transformer body (7)；
The transformer oil level and oil temperature sensor (5) are mounted on the oil tank of transformer at the top of distribution transformer body (7)
(8) on madial wall, transformer oil level and oil temperature sensor (5) are used to monitor the oil temperature and oil level in oil tank of transformer (8)；
The intelligent monitoring terminal (6) is arranged on the side wall of distribution transformer body (7) housing, built in the high-voltage leading-out wire
Voltage and current transformer (1), low pressure lead-out wire built-in voltage and current transformer (2), sunshine recorder (4) and transformer oil
The signal output part of position and oil temperature sensor (5) is all connected with the signal input part of intelligent monitoring terminal (6)；
Intelligent power saving increase-volume distribution transformer also includes peripheral meteorological data sensor, and the peripheral meteorological data sensor includes
Environment temperature sensor (9), ambient pressure sensor (10) and ambient wind velocity sensor (11), the environment temperature sensor
(9), the signal output part of ambient pressure sensor (10) and ambient wind velocity sensor (11) is all connected with intelligent monitoring terminal (6)
Environment weather data communication end；
The intelligent power saving increase-volume distribution transformer also includes surrounding air density sensor (12) and surrounding air specific heat at constant pressure
The signal output part of measuring instrument (13), the surrounding air density sensor (12) and surrounding air specific heat at constant pressure measuring instrument (13)
It is all connected with the environment weather data communication end of intelligent monitoring terminal (6)；
The monitoring method of intelligent power saving increase-volume distribution transformer, comprises the following steps：
Step 1：The real-time temperature of oil in transformer of transformer oil level and oil temperature sensor (5) measurement distribution transformer body (7)
Spend tBecome, the real-time environment temperature t of environment temperature sensor (9) measurement distribution transformer body (7) surroundingRing, surrounding air density
Real-time surrounding air density p, surrounding air specific heat at constant pressure measuring instrument around sensor (12) measurement distribution transformer body (7)
(13) real-time pressurization by compressed air specific heat c around measurement distribution transformer body (7), ambient wind velocity sensor (11) measurement distribution becomes
Real-time ambient wind velocity Q around depressor body (7), the real-time sunshine heat of sunshine recorder (4) measurement distribution transformer body (7)
Measure ΦDay, meanwhile, transformer oil level and oil temperature sensor (5), environment temperature sensor (9), surrounding air density sensor
(12), surrounding air specific heat at constant pressure measuring instrument (13), ambient wind velocity sensor (11) and sunshine recorder (4) are respectively by transformer
Oil temperature tBecome, environment temperature tRing, surrounding air density p, pressurization by compressed air specific heat c, ambient wind velocity Q and sunshine heat ΦDayIt is transferred to
Intelligent monitoring terminal (6)；
Step 2：Intelligent monitoring terminal (6) is according to transformer oil temperature t obtained aboveBecome, environment temperature tRing, surrounding air density
ρ, pressurization by compressed air specific heat c and ambient wind velocity Q, utilize formula ΦDissipate=ρ cQ (tBecome-tRing) distribution transformer body (7) is calculated because of wind speed
Influence the heat given out；
Step 3：The transformer oil temperature t obtained when intelligent monitoring terminal (6)BecomeDuring 85 DEG C of ＞, distribution transformer body (7) is represented
Improper load operation；
The transformer oil temperature t obtained when intelligent monitoring terminal (6)BecomeDuring 70 DEG C of ＜, represent that distribution transformer body (7) is normally negative
Lotus runs；
70 DEG C≤the t of transformer oil temperature obtained when intelligent monitoring terminal (6)BecomeAt≤85 DEG C, Φ is further calculatedDayBecome with distribution
The heat Φ that depressor body (7) gives out by air speed influenceDissipateBetween difference, work as ΦDay-ΦDissipateIllustrate solar radiation distribution when >=0
Transformer body (7) is normally run；Work as ΦDay-ΦDissipateIllustrating the heat of sunshine during ＜ 0 can be blazed abroad by air flow, be matched somebody with somebody
Piezoelectric transformer body (7) is normally run.
2. the monitoring method of intelligent power saving increase-volume distribution transformer according to claim 1, it is characterised in that：Intelligent power saving
Increase-volume distribution transformer also includes GPS location equipment (3), and the GPS location equipment (3) is arranged on distribution transformer body (7)
The top of housing, the GPS location data communication end of the communication ends connection intelligent monitoring terminal (6) of the GPS location equipment (3).
3. the monitoring method of intelligent power saving increase-volume distribution transformer according to claim 1, it is characterised in that：Intelligent power saving
Increase-volume distribution transformer also includes remote subscriber control system (14), the communication ends and intelligence of the remote subscriber control system (14)
Can monitoring terminal (6) data communication end wireless communication connection.
4. the monitoring method of intelligent power saving increase-volume distribution transformer according to claim 1, it is characterised in that：The step
In 1, high-voltage leading-out wire built-in voltage and current transformer (1) monitoring distribution transformer body (7) on high-tension side real-time voltage value
And current value；Low pressure lead-out wire built-in voltage and current transformer (2) monitor the real-time electricity of distribution transformer body (7) low-pressure side
Pressure value and current value；High-voltage leading-out wire built-in voltage and current transformer (1) and low pressure lead-out wire built-in voltage and Current Mutual Inductance
Device (2) is low by the on high-tension side real-time voltage value of distribution transformer body (7) and current value and distribution transformer body (7) respectively
The real-time voltage value and current value of side is pressed to be transferred to intelligent monitoring terminal (6)；
It is real-time when the on high-tension side real-time voltage value of distribution transformer body (7) and current value and low-pressure side in the step 3
There is a value not illustrate that distribution transformer body (7) is run in critical field set in advance, then in magnitude of voltage and current value
It is abnormal.
5. the monitoring method of intelligent power saving increase-volume distribution transformer according to claim 4, it is characterised in that：The step
Also include step 4 after 3：By distribution transformer body (7) operation, whether normal result is uploaded to the intelligent monitoring terminal (6)
Remote subscriber control system (14).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510689617.3A CN105206381B (en) | 2015-10-21 | 2015-10-21 | Intelligent power saving increase-volume distribution transformer and monitoring method |
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|---|---|---|---|
| CN201510689617.3A CN105206381B (en) | 2015-10-21 | 2015-10-21 | Intelligent power saving increase-volume distribution transformer and monitoring method |
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| CN105206381B true CN105206381B (en) | 2017-08-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105676030A (en) * | 2016-01-29 | 2016-06-15 | 杭州海兴电力科技股份有限公司 | Transformer monitoring terminal |
| EP3293743A1 (en) * | 2016-09-12 | 2018-03-14 | ABB Schweiz AG | A cover for electric power devices filled with a dielectric liquid |
| EP3593366A4 (en) * | 2017-03-10 | 2021-05-05 | ABB Power Grids Switzerland AG | Smart grid distribution transformer |
| CN107238783A (en) * | 2017-06-02 | 2017-10-10 | 合肥同佑电子科技有限公司 | A kind of transformer monitoring systems and monitoring method |
| CN109559880A (en) * | 2018-11-06 | 2019-04-02 | 国网山东省电力公司龙口市供电公司 | A kind of Intelligent distribution transformer |
| CN110739140A (en) * | 2019-10-28 | 2020-01-31 | 江苏龙创电气有限公司 | distribution transformer with automatic capacity regulating function |
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| CN204131091U (en) * | 2014-10-29 | 2015-01-28 | 湘潭华夏特种变压器有限公司 | A kind of intelligent transformer control device |
| CN204229615U (en) * | 2014-11-07 | 2015-03-25 | 西安航空学院 | A kind of voltage transformer wireless supervisory system |
| CN205122330U (en) * | 2015-10-21 | 2016-03-30 | 国家电网公司 | Energy -conserving increase -volume distribution transformer of intelligence |
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Effective date of registration: 20170217 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant after: State Grid Corporation of China Applicant after: Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute Applicant after: Nanjing Nari Co., Ltd. Applicant after: State Grid Beijing Electric Power Company Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant before: State Grid Corporation of China Applicant before: Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute |
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Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute Patentee after: NARI Group Corp. Patentee after: STATE GRID BEIJING ELECTRIC POWER Co. Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee before: State Grid Corporation of China Patentee before: Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute Patentee before: Nanjing Nanrui Group Co. Patentee before: STATE GRID BEIJING ELECTRIC POWER Co. |
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