CN201740828U - Integral test instrument of power distribution transformer - Google Patents
Integral test instrument of power distribution transformer Download PDFInfo
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- CN201740828U CN201740828U CN2010202566105U CN201020256610U CN201740828U CN 201740828 U CN201740828 U CN 201740828U CN 2010202566105 U CN2010202566105 U CN 2010202566105U CN 201020256610 U CN201020256610 U CN 201020256610U CN 201740828 U CN201740828 U CN 201740828U
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Abstract
The utility model provides an integral test instrument of a power distribution transformer, which relates to the field of transformers. The utility model is designed by aiming at the problem that the transformer in the prior art can not be automatically detected. The integral test instrument of the power distribution transformer comprises a signal filtering module, a signal processing module, an input/output module and a power supply module, wherein the signal filtering module is connected with three-phase voltage and three-phase current of the power distribution transformer, and is used for filtering the waveform of the three-phase voltage and the three-phase current to output filtered waveform, the signal processing module is connected with the signal filtering module, and is used for inputting the filtered waveform for carrying out the filtered waveform to generate the electric meter data, the input/output module is connected with the signal processing module, and is used for outputting the electric meter data, and the power supply module is connected with the signal filtering module, the signal processing module and the input/output module and is used for supplying electricity. The utility model can detect the operation state of the transformer.
Description
Technical field
The utility model relates to field transformer, is meant a kind of comprehensive tester of substation transformer especially.
Background technology
At present, the construction of intelligent grid is underway.Substation transformer is an important component part in the intelligent grid.In the operational process of intelligent grid, need comprehensive transformer of monitoring and dedicated transformer, gather the operational factor of transformer, to analyze the state of transformer.In the prior art, can not monitor automatically the state of transformer.
The utility model content
The technical problems to be solved in the utility model provides a kind of comprehensive tester of substation transformer, running status that can measuring transformer.
For solving the problems of the technologies described above, embodiment of the present utility model provides technical scheme as follows:
A kind of comprehensive tester of substation transformer comprises:
The filtering signals module, the three-phase voltage and the three-phase current of connection substation transformer are to the waveform filtration of described three-phase voltage and three-phase current, the waveform after the output filtering;
Signal processing module is connected with described filtering signals module, imports the waveform after the described filtration, to the waveform processing after the described filtration, generates ammeter data,
Input/output module is connected with described signal processing module, exports described ammeter data;
Power module is connected with described filtering signals module, described signal processing module, described input/output module, powers.
The three-phase voltage of described substation transformer is: the voltage on the three-phase line of the low-pressure side of described substation transformer; Described three-phase voltage obtains by the three-phase firewire and the center line of the low-pressure side of the described substation transformer of direct connection;
The three-phase current of described substation transformer is: the three-phase current of the low-pressure side of described substation transformer, described three-phase current collects by current transformer.
Described signal processing module is CPU;
Described tester also comprises: AD converter, and described signal processing module is connected with described filtering signals module by described AD converter; The waveform of described AD converter after with described filtration is converted into digital signal, sends to described CPU.
The comprehensive tester of described substation transformer also comprises:
Wireless radio-frequency communication module, be connected with described signal processing module, receive the temperature signal of described substation transformer, described temperature signal is the temperature of cable junction signal of low pressure outlet of the temperature of cable junction signal of the high pressure inlet wire of the oil temperature signal of described substation transformer, described substation transformer, described substation transformer or the node temperature signal of described substation transformer, after the processing, send to described signal processing module;
Described signal processing module generates temperature data according to the described temperature signal after handling;
Described input/output module is exported described temperature data.
The comprehensive tester of described substation transformer,
Described input/output module, the predetermined value of input temp data and/or the predetermined value of ammeter data;
Described tester also comprises: alarm unit, be connected with described signal processing module, and when the predetermined value of described temperature data, then report to the police above described temperature data; And/or, then report to the police when the predetermined value of described ammeter data above described ammeter data.
The comprehensive tester of described substation transformer also comprises:
Camera is gathered described substation transformer image on every side, and is sent to described signal processing module;
Described signal processing module is exported to described input/output module with described image;
Described input/output module is exported described image.
Described input/output module is: the combination in any of one or more in keyboard, display, liquid crystal display, Ethernet interface, RS232, RS422 serial ports, RS485 serial ports, GPRS transport module or the wireless microwave transmission module.
Described ammeter data is three-phase current, three-phase voltage, three phases active power, three phase reactive power, three-phase activity coefficient, three-phase applied power, zero-sequence current, residual voltage, harmonic current, harmonic voltage, three-phase voltage qualification rate, forward active electrical degree, the reverse combination in any of one or more in active electrical degree, the idle electric degree of forward and the reverse idle electric degree.
Described signal processing module also is used for, and according to the three phase reactive power of described substation transformer, generates the compensating signal of reactive power, outputs to the reactive-load compensation cabinet that is connected with described transformer; Generate the balanced signal of three phase power according to the three phase power of described substation transformer, output to the three-phase power balance compensating cabinet that is connected with described transformer.
Described signal processing module also is used for, according to the ammeter data of described three-phase voltage, calculate the three-phase voltage of described substation transformer greater than the three-phase voltage of the time span of pre-determined upper voltage limit, described substation transformer time span and power off time length less than the predetermined voltage lower limit.
Embodiment of the present utility model has following beneficial effect:
The filtering signals module, the three-phase voltage and the three-phase current of connection substation transformer are to the waveform filtration of described three-phase voltage and three-phase current, the waveform after the output filtering; Signal processing module is connected with described filtering signals module, imports the waveform after the described filtration, to the waveform processing after the described filtration, generates ammeter data, and input/output module is connected with described signal processing module, exports described ammeter data; Can carry out automatically and monitoring in real time the running status of transformer.
Description of drawings
Fig. 1 is the structural representation of an embodiment of the comprehensive tester of substation transformer described in the utility model;
Fig. 2 is the structural representation of another embodiment of the comprehensive tester of substation transformer described in the utility model;
Fig. 3 is the structural representation of another embodiment of the comprehensive tester of substation transformer described in the utility model;
Fig. 4 is in the comprehensive tester of substation transformer described in the utility model, the access connection layout of three-phase voltage and three-phase current.
Embodiment
For technical matters, technical scheme and advantage that embodiment of the present utility model will be solved is clearer, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
As shown in Figure 1, the embodiment for the comprehensive tester of a kind of substation transformer described in the utility model comprises:
The filtering signals module, the three-phase voltage and the three-phase current of connection substation transformer are to the waveform filtration of described three-phase voltage and three-phase current, the waveform after the output filtering;
Signal processing module is connected with described filtering signals module, imports the waveform after the described filtration, to the waveform processing after the described filtration, generates ammeter data,
Input/output module is connected with described signal processing module, exports described ammeter data;
Power module is connected with described filtering signals module, described signal processing module, described input/output module, powers.
The three-phase voltage of described substation transformer is: the voltage on the three-phase line of the low-pressure side of described substation transformer; Described three-phase voltage obtains by the three-phase firewire and the center line of the low-pressure side of the described substation transformer of direct connection;
The three-phase current of described substation transformer is: the three-phase current of the low-pressure side of described substation transformer, described three-phase current collects by current transformer.During data acquisition, each power frequency cycle adopts and counts 256.
As shown in Figure 2, be another embodiment of the comprehensive tester of a kind of substation transformer described in the utility model, described signal processing module is CPU;
Described tester also comprises: AD converter, and described signal processing module is connected with described filtering signals module by described AD converter; The waveform of described AD converter after with described filtration is converted into digital signal, sends to described CPU.The figure place of AD converter can be 16.
The comprehensive tester of described substation transformer also comprises:
Wireless radio-frequency communication module, be connected with described signal processing module, receive the temperature signal of described substation transformer, described temperature signal is the temperature of cable junction signal of low pressure outlet of the temperature of cable junction signal of the high pressure inlet wire of the oil temperature signal of described substation transformer, described substation transformer, described substation transformer or the node temperature signal of described substation transformer, after the processing, send to described signal processing module;
Described signal processing module generates temperature data according to the described temperature signal after handling;
Described input/output module is exported described temperature data.
Described input/output module, the predetermined value of input temp data and/or the predetermined value of ammeter data; I/O unit can be keyboard, also can be for receiving and predetermined value by communication interface.
Described tester also comprises: alarm unit, be connected with described signal processing module, and when the predetermined value of described temperature data, then report to the police above described temperature data; And/or, then report to the police when the predetermined value of described ammeter data above described ammeter data.
The comprehensive tester of described substation transformer also comprises:
Camera is gathered described substation transformer image on every side, and is sent to described signal processing module;
Described signal processing module is exported to described input/output module with described image;
Described input/output module is exported described image.Camera can be digital camera.Tester has video interface, can insert digital camera, passes transformer operation conditions on every side back by communication port, so that the monitoring weather condition, pilferage situation, condition of construction etc.
Described input/output module is: the combination in any of one or more in display, liquid crystal display, Ethernet interface, RS232, RS422 serial ports, RS485 serial ports, GPRS transport module or the wireless microwave transmission module.
Described ammeter data is three-phase current, three-phase voltage, three phases active power, three phase reactive power, three-phase activity coefficient, three-phase applied power, zero-sequence current, residual voltage, harmonic current, harmonic voltage, three-phase voltage qualification rate, forward active electrical degree, the reverse combination in any of one or more in active electrical degree, the idle electric degree of forward and the reverse idle electric degree, to realize the function of rate of qualified voltage statistics, watt metering, operation warning, burglar alarm.
Described signal processing module also is used for, and according to the three phase reactive power of described substation transformer, generates the compensating signal of reactive power, outputs to the reactive-load compensation cabinet that is connected with described transformer; Generate the balanced signal of three phase power according to the three phase power of described substation transformer, output to the three-phase power balance compensating cabinet that is connected with described transformer.
Described signal processing module also is used for, according to the ammeter data of described three-phase voltage, calculate the three-phase voltage of described substation transformer greater than the three-phase voltage of the time span of pre-determined upper voltage limit, described substation transformer time span and power off time length less than the predetermined voltage lower limit.
As shown in Figure 3, be an embodiment of the comprehensive tester of a kind of substation transformer described in the utility model.The input signal of tester is:
(1) three-phase current is the electric current on the three-phase line of 220V low-pressure side, by the current transformer collection, and the secondary current＜5A of input;
(2) three-phase voltage is the three-phase voltage of low-pressure side, directly inserts three-phase firewire and center line;
(3) transformer node temperature is with cable temperature, the node temperature of monitoring temperature of oil in transformer, high pressure inlet wire or low pressure outlet; The signal access way as shown in Figure 4.
Described power module input direct current 220V or alternating current 220V are powered to filtering signals module and CPU module;
Described wireless radio-frequency communication module is input to CPU after the gentle temperature of cable junction of transformer oil is handled.
Described digital camera is gathered the operation conditions around the transformer, sends CPU to, so that detect weather condition, pilferage situation and condition of construction around the transformer.
Described filtering signals module is filtered into the needed waveform of CPU to the three-phase voltage of input and the waveform of three-phase current; After 16 bit A/D converters were digital signal with analog signal conversion, CPU carried out Treatment Analysis to signal, outputed on the input/output modules such as liquid crystal display, perhaps sent by communication interface.
Keyboard can be provided with some parameters, function etc., and the information of output can be presented on the liquid crystal display accurately, realizes functions such as burglar alarm, operation function warning, electric weight statistics, rate of qualified voltage statistics.
Tester has remote meter reading and control function.Be specially: have plurality of communication schemes, can realize flexible networking, give various electrical power distribution automatization systems data remote.Signal output is comprised by plurality of communication schemes:
GPRS (General Packet Radio Service, general packet radio service), several modes such as Ethernet, RS232 serial ports, RS422 serial ports, RS485 serial ports, wireless microwave, the timing that can realize data is uploaded, caller is met the police and uploaded, uploads in real time, controls down biography, input/output interface function, and the deal with data of CPU is presented on the liquid crystal display.
Have the GPRS module, utilize public network transmission data, upload speed can be 88KBPS;
Described Ethernet interface utilizes the Optical Fiber Transmission data, and upload speed can be 100M;
Described RS232/RS485 serial ports utilizes the special line Data transmission, and speed can be 115200BPS;
Described wireless microwave utilizes the wireless radio-frequency Data transmission, and speed can be 20KBPS, 100 meters of distances.
Utilize data-interface, can realize:
(1) regularly uploads.
(2), can determine that data are uploaded in the timing of various ways, if any definite data of different types of selecting, according to different user specified data uplink time etc. according to service needed and concrete condition.
(3) alert uploading met in caller.Run into special circumstances, as overload, current/voltage transfinite, show that case is opened, when the oil temperature is crossed high failure condition and is taken place, front end is initiatively reported to the police and is uploaded related data to main website.
(4) upload in real time.At any time accept main website and call out, upload relevant real time data at any time.
(5) control passes down.Steering order can be assigned as required by main website.
Tester can the real time data monitoring.By gathering the low pressure three-phase voltage, raw informations such as three-phase current and node temperature can further calculate all kinds of parameters.Wherein, three-phase current, three-phase voltage are by measuring, three phases active power, three phase reactive power, three-phase activity coefficient, three-phase applied power calculate by formula, zero-sequence current, residual voltage obtain by synthetic, harmonic current, harmonic voltage can obtain for passing through FFT (fast Fourier transform, Fast Fourier Transform (FFT)), and node temperature is by measuring.
In addition, in order to add up the working condition of circuit and transformer, tester also has multiple statistical function, and is specific as follows:
(1) rate of qualified voltage statistics
Detail record three-phase voltage qualification rate, voltage is got over the temporal summation of the upper limit, gets over the temporal summation of lower limit, power off time summation or the like;
(2) watt metering
Statistics four-quadrant electric degree number comprises the forward active electrical degree, reverse active electrical degree, the idle electric degree of forward, reverse idle electric degree.
(3) operation warning function
Monitoring transformer overload operation, current/voltage transfinite, the oil temperature is crossed high failure condition, in case appearance is unusual, report to the police at once.
(4) anti-theft alarm function
The monitoring form case is opened in real time, steals transformer, and electricity filching behaviors such as short circuit CT, open circuit PT in case appearance is unusual, are reported to the police at once.
In addition, tester not only has conventional monitoring function, also has control function, can directly control reactive-load compensation cabinet and three-phase power balance compensating cabinet, reaches compensating power, realizes the effect of transformer three-phase power balance.Be specially:
(1) control reaches No. 24 capacitors and reactor, compensation capacity scope 30kvar～300kvar;
(2) directly drive controllable silicon, contactor or intelligent compound switch;
(3) have the function of differentiating each road capacitor output capacity automatically, need not to be provided with condenser capacity; After condenser capacity reduced, controller is the current capacity of identification automatically, reached the effect of optimum control;
(4) using compensation algorithm, the switch motion least number of times prolongs switch serviceable life; After the compensation, power factor is not less than 0.98.
The substation transformer comprehensive tester is the construction that is applied to intelligent distribution, and it can be used for monitoring comprehensive transformer and dedicated transformer, gathers the operational factor of transformer.After the various parameters of gathering transformer, can further analyze the state of transformer, realize the repair based on condition of component of transformer, risk assessment.Simultaneously, tester also has functions such as electric weight statistics, reactive-load compensation, power quality analysis.Have multiple communication function, can with the supporting use of all kinds of electrical power distribution automatization systems, be one of intelligent power distribution terminal of building intelligent grid.Can adopt liquid crystal display to show running status on the spot, be applicable to occasions such as low voltage electric network monitoring running state and low pressure dynamic passive compensation.
Tester not only can be monitored transformer ruuning situation, can also realize following function:
Monitor the situation that transformer is stolen, whether the monitoring transformer gathers transformer on every side image information by stealing, realizes remote meter-reading function, gather the ammeter data of transformer, and centralized meter-reading system is given in teletransmission; Control reactive-load compensation cabinet is realized low-pressure reactive compensation; The power controlling balancing tank is realized three-phase power balance; Gather the transformer running temperature, realize state-detection.Can effectively improve the distribution management level, grasp the distribution operation information comprehensively,, build intelligent grid to realize power distribution automation.
The above is a preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from principle described in the utility model; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (10)
1. the comprehensive tester of a substation transformer is characterized in that, comprising:
The filtering signals module, the three-phase voltage and the three-phase current of connection substation transformer are to the waveform filtration of described three-phase voltage and three-phase current, the waveform after the output filtering;
Signal processing module is connected with described filtering signals module, imports the waveform after the described filtration, to the waveform processing after the described filtration, generates ammeter data;
Input/output module is connected with described signal processing module, exports described ammeter data;
Power module is connected with described filtering signals module, described signal processing module, described input/output module, powers.
2. the comprehensive tester of substation transformer according to claim 1 is characterized in that, the three-phase voltage of described substation transformer is: the voltage on the three-phase line of the low-pressure side of described substation transformer; Described three-phase voltage obtains by the three-phase firewire and the center line of the low-pressure side of the described substation transformer of direct connection;
The three-phase current of described substation transformer is: the three-phase current of the low-pressure side of described substation transformer, described three-phase current collects by current transformer.
3. the comprehensive tester of substation transformer according to claim 1, described signal processing module is CPU;
Described tester also comprises: AD converter, and described signal processing module is connected with described filtering signals module by described AD converter; The waveform of described AD converter after with described filtration is converted into digital signal, sends to described CPU.
4. the comprehensive tester of substation transformer according to claim 1 is characterized in that, also comprises:
Wireless radio-frequency communication module, be connected with described signal processing module, receive the temperature signal of described substation transformer, after the processing, send to described signal processing module, described temperature signal is the temperature of cable junction signal of low pressure outlet of the temperature of cable junction signal of the high pressure inlet wire of the oil temperature signal of described substation transformer, described substation transformer, described substation transformer or the node temperature signal of described substation transformer;
Described signal processing module generates temperature data according to the described temperature signal after handling;
Described input/output module is exported described temperature data.
5. the comprehensive tester of substation transformer according to claim 4 is characterized in that,
Described input/output module also is used for, the predetermined value of input temp data and/or the predetermined value of ammeter data;
Described tester also comprises: alarm unit, be connected with described signal processing module, and when the predetermined value of described temperature data, then report to the police above described temperature data; And/or, then report to the police when the predetermined value of described ammeter data above described ammeter data.
6. the comprehensive tester of substation transformer according to claim 1 is characterized in that, also comprises:
Camera is gathered described substation transformer image on every side, and is sent to described signal processing module;
Described signal processing module is exported to described input/output module with described image;
Described input/output module is exported described image.
7. the comprehensive tester of substation transformer according to claim 1, it is characterized in that described input/output module is: the combination in any of one or more in keyboard, display, liquid crystal display, Ethernet interface, RS232, RS422 serial ports, RS485 serial ports, GPRS transport module or the wireless microwave transmission module.
8. the comprehensive tester of substation transformer according to claim 1 is characterized in that,
Described ammeter data is three-phase current, three-phase voltage, three phases active power, three phase reactive power, three-phase activity coefficient, three-phase applied power, zero-sequence current, residual voltage, harmonic current, harmonic voltage, three-phase voltage qualification rate, forward active electrical degree, the reverse combination in any of one or more in active electrical degree, the idle electric degree of forward and the reverse idle electric degree.
9. the comprehensive tester of substation transformer according to claim 8 is characterized in that,
Described signal processing module also is used for, and according to the three phase reactive power of described substation transformer, generates the compensating signal of reactive power, outputs to the reactive-load compensation cabinet that is connected with described transformer; Generate the balanced signal of three phase power according to the three phase power of described substation transformer, output to the three-phase power balance compensating cabinet that is connected with described transformer.
10. the comprehensive tester of substation transformer according to claim 8 is characterized in that,
Described signal processing module also is used for, according to the ammeter data of described three-phase voltage, calculate the three-phase voltage of described substation transformer greater than the three-phase voltage of the time span of pre-determined upper voltage limit, described substation transformer time span and power off time length less than the predetermined voltage lower limit.
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|---|---|---|---|
| CN2010202566105U CN201740828U (en) | 2010-07-02 | 2010-07-02 | Integral test instrument of power distribution transformer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010202566105U CN201740828U (en) | 2010-07-02 | 2010-07-02 | Integral test instrument of power distribution transformer |
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| CN2010202566105U Expired - Lifetime CN201740828U (en) | 2010-07-02 | 2010-07-02 | Integral test instrument of power distribution transformer |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102331534A (en) * | 2011-06-09 | 2012-01-25 | 航天科工深圳（集团）有限公司 | Power distribution terminal detecting system and method |
| CN103424656A (en) * | 2013-08-08 | 2013-12-04 | 江苏理工学院 | Electric parameter comprehensive detector for duplex potentiometer |
| CN104181412A (en) * | 2013-05-24 | 2014-12-03 | Det国际控股有限公司 | Arc detection |
| CN104515919A (en) * | 2014-12-24 | 2015-04-15 | 镇江长河电力技术有限公司 | Energy-efficiency online monitoring and analysis system of distribution transformer |
| CN104569664A (en) * | 2014-12-24 | 2015-04-29 | 镇江长河电力技术有限公司 | Analytic system provided with energy efficiency online monitoring and analyzing device for distribution transformer |
| CN104597899A (en) * | 2015-02-04 | 2015-05-06 | 国家电网公司 | Technical performance test platform of distribution automation device |
| CN105486894A (en) * | 2015-11-27 | 2016-04-13 | 国网河南宜阳县供电公司 | Unmanned high-voltage metering power distribution device and method |
| CN106772117A (en) * | 2016-12-01 | 2017-05-31 | 武汉市欧睿科技有限公司 | A kind of integrated testing instrument for transformer |
| CN108983043A (en) * | 2018-07-30 | 2018-12-11 | 国网河南省电力公司周口供电公司 | Power distribution network mesolow side operational monitoring main website management system |
| WO2020259415A1 (en) * | 2019-06-26 | 2020-12-30 | 山东电工电气集团智能电气有限公司 | Transformer monitoring method and device and storage medium |
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2010
- 2010-07-02 CN CN2010202566105U patent/CN201740828U/en not_active Expired - Lifetime
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102331534A (en) * | 2011-06-09 | 2012-01-25 | 航天科工深圳（集团）有限公司 | Power distribution terminal detecting system and method |
| CN102331534B (en) * | 2011-06-09 | 2014-08-20 | 航天科工深圳（集团）有限公司 | Power distribution terminal detecting system and method |
| CN104181412A (en) * | 2013-05-24 | 2014-12-03 | Det国际控股有限公司 | Arc detection |
| CN104865482B (en) * | 2013-08-08 | 2017-07-11 | 江苏理工学院 | High-precision duplex potentiometer electrical parameter comprehensive detector |
| CN103424656B (en) * | 2013-08-08 | 2015-07-29 | 江苏理工学院 | Electric parameter comprehensive detector for duplex potentiometer |
| CN104865482A (en) * | 2013-08-08 | 2015-08-26 | 江苏理工学院 | High-precision duplex potentiometer electrical parameter comprehensive detector |
| CN104977493A (en) * | 2013-08-08 | 2015-10-14 | 江苏理工学院 | Detector for total resistance, zero resistance and synchronous characteristic of duplex potentiometer |
| CN103424656A (en) * | 2013-08-08 | 2013-12-04 | 江苏理工学院 | Electric parameter comprehensive detector for duplex potentiometer |
| CN104977493B (en) * | 2013-08-08 | 2017-09-29 | 江苏理工学院 | Detector for total resistance, zero resistance and synchronous characteristic of duplex potentiometer |
| CN104515919A (en) * | 2014-12-24 | 2015-04-15 | 镇江长河电力技术有限公司 | Energy-efficiency online monitoring and analysis system of distribution transformer |
| CN104569664A (en) * | 2014-12-24 | 2015-04-29 | 镇江长河电力技术有限公司 | Analytic system provided with energy efficiency online monitoring and analyzing device for distribution transformer |
| CN104597899A (en) * | 2015-02-04 | 2015-05-06 | 国家电网公司 | Technical performance test platform of distribution automation device |
| CN105486894A (en) * | 2015-11-27 | 2016-04-13 | 国网河南宜阳县供电公司 | Unmanned high-voltage metering power distribution device and method |
| CN106772117A (en) * | 2016-12-01 | 2017-05-31 | 武汉市欧睿科技有限公司 | A kind of integrated testing instrument for transformer |
| CN108983043A (en) * | 2018-07-30 | 2018-12-11 | 国网河南省电力公司周口供电公司 | Power distribution network mesolow side operational monitoring main website management system |
| WO2020259415A1 (en) * | 2019-06-26 | 2020-12-30 | 山东电工电气集团智能电气有限公司 | Transformer monitoring method and device and storage medium |
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