CN201637794U - Transformer on-line monitoring and manufacturer remote monitoring system based on wireless transmission - Google Patents
Transformer on-line monitoring and manufacturer remote monitoring system based on wireless transmission Download PDFInfo
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Abstract
The utility model discloses a transformer on-line monitoring and manufacturer remote monitoring system based on wireless transmission, which adopts an innovative service management mode that a manufacturer monitors the running condition of manufactured equipment in real time. Mainly aiming at remote electric power running sites, the transformer on-line monitoring and manufacturer remote monitoring system collects various running data through multiple channels in real time by utilizing such technologies as various transformer information monitoring, comprehensive status characteristic analysis and network data transmission, carries out on-line monitoring on a transformer and remote monitoring on the manufacturer by utilizing a public wireless communication network, and carries out status monitoring as well as analyzing on the on-site running condition of the electric equipment, so as to prevent faults or quickly solve the faults when the faults are incurred, thereby realizing unattended mode in the true sense and reducing the maintenance cost; moreover, as the status maintenance on the high-voltage electrical equipment exerts active promoting function, the reliable running of power transformation is ensured.
Description
Technical field
The utility model relates to field of wireless communication and electrical equipment online monitoring field, specifically a kind of transformer online monitoring and manufacturer's Long-Range Surveillance System based on wireless transmission.
Background technology
At present, the coverage rate of company limited of China Mobile GPRS network and China Telecom cdma network improves day by day, city, the county in the whole nation 99% can have been covered, mobile communication service is mainly to turn to data communication and voice communication to run neck and neck by voice communication just progressively, is that the data communication of purpose is becoming in the radio communication service extremely important and development branch rapidly with the commercial Application.
Along with deepening continuously of Automation of Electric Systems, transformer station's unmanned, device intelligenceization is the inexorable trend of electric power development, repair based on condition of component has become the certainty of power system development, the transformer online monitoring technology also constantly develops and tends to ripe, each large equipment manufacturer or power automation company are all at the relevant on-line monitoring product (or system) of exploitation, but the management to the High-Voltage Electrical Appliances operation information generally is to transmit it to High-Voltage Electrical Appliances operator, does not still have the common network of using and carries out wireless data transmission, and with the system of operation information teletransmission to high-tension electricity device manufacturer.
Summary of the invention
For solving the technical matters of above-mentioned existence, the utility model provides a kind of transformer online monitoring and manufacturer's Long-Range Surveillance System based on wireless transmission, transformer is moved the field monitoring data arrive High-Voltage Electrical Appliances manufacturer Surveillance center by public wireless network transmissions such as radio mobile communication net (comprising GPRS, CDMA, 3G), wireless ethernet or satellite communications net, realize the real-time online management of manufacturer, and then guarantee the High-Voltage Electrical Appliances safe and reliable operation the High-Voltage Electrical Appliances operation information.
For achieving the above object, the technical solution adopted in the utility model is as follows:
Include the on-the-spot substation data acquisition system (DAS) of the operation that connects by public wireless communication networks and manufacturer's central station data monitoring analytic system, the on-the-spot substation of described operation data acquisition system (DAS) includes transformer operation winding temperature and pasta temperature on-line monitoring device, transformer pasta position on-Line Monitor Device, Gas in Oil of Transformer content on-Line Monitor Device, partial discharge of transformer amount on-Line Monitor Device, transformer core earth leakage electric current on-Line Monitor Device and arrester ground On-line Monitoring of Leakage Current device, described manufacturer's central station data monitoring analytic system includes manufacturer's central station data acquisition server, manufacturer's central station client-server and manufacturer's telemonitoring electronic curtain, described each on-Line Monitor Device and manufacturer's central station data acquisition server, information transmission by public wireless communication networks between manufacturer's central station client-server connects, and manufacturer's central station data acquisition server is connected by data line with manufacturer's telemonitoring electronic curtain;
By the manufacturer operation conditions of its equipment manufactured thereby is monitored in real time, be a kind of Service Management pattern of innovation;
The on-the-spot substation of described operation data acquisition system (DAS) is in order to the real-time collection that realizes the transformer operation information and real time monitoring, to the operation control of each transformer operation information monitoring device, to the real-time abnormity diagnosis of system and warning, the inquiry to various parameters, setting, modification;
Described manufacturer's central station data monitoring analytic system is in order to realize that the remote real-time monitor, remote live abnormal alarm, remote parameter inquiry, the various operational reports of generation that move on-the-spot each transformer operation information monitoring device are imported into manufacturer's telemonitoring electronic curtain for inquiry and printing, real time monitoring information synchronization.
The utility model is monitored the operation conditions of its equipment manufactured thereby in real time by the manufacturer, Service Management pattern for a kind of innovation, be primarily aimed at remote operation power scene, use Transformer Winding temperature and pasta on-line temperature monitoring, pasta position on-line monitoring, gas content on-line monitoring in the oil, the leakage current of an arrester on-line monitoring, the iron core grounding On-line Monitoring of Leakage Current, partial discharge monitoring, technology such as comprehensive state specificity analysis and network data transmission, the real-time various service datas of collection by all kinds of means, the utilization public radio communication network carries out on-line monitoring and manufacturer's telemonitoring to transformer, by electrical equipment ruuning situation is at the scene carried out status monitoring and situation analysis, and then trouble saving or the quick fault that solves under the situation of breaking down, can realize unmanned truly, reduce maintenance cost, high-voltage electrical equipment is implemented the effect that state-maintenance plays positive promotion, ensured the reliability service of power transformation.
Description of drawings
Fig. 1 is the utility model system architecture connection diagram;
Fig. 2 is for extracting the schematic diagram of Gas in Oil of Transformer content information;
Fig. 3 is for extracting the schematic diagram of partial discharge of transformer amount information;
Fig. 4 is the utility model data transmission flow process figure;
Fig. 5 is the utility model network communication connection diagram.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in detail:
As shown in Figure 1, the utility model includes the on-the-spot substation data acquisition system (DAS) of the operation that connects by public wireless communication networks and manufacturer's central station data monitoring analytic system, the on-the-spot substation of described operation data acquisition system (DAS) includes transformer operation winding temperature and pasta temperature on-line monitoring device, transformer pasta position on-Line Monitor Device, Gas in Oil of Transformer content on-Line Monitor Device, partial discharge of transformer amount on-Line Monitor Device, transformer core earth leakage electric current on-Line Monitor Device and arrester ground On-line Monitoring of Leakage Current device, described manufacturer's central station data monitoring analytic system includes manufacturer's central station data acquisition server, manufacturer's central station client-server and manufacturer's telemonitoring electronic curtain, described each on-Line Monitor Device and manufacturer's central station data acquisition server, information transmission by public wireless communication networks between manufacturer's central station client-server connects, and manufacturer's central station data acquisition server is connected by data line with manufacturer's telemonitoring electronic curtain.
On-the-spot in operation, the operation information of transformer is indicating its running status, by monitoring these change in information, can in time find some latency fault that transformer may exist, and then in time take corresponding measure, avoids causing big accident.
The utility model moves on-the-spot substation data acquisition system (DAS) and realizes following function by above-mentioned transformer operation information monitoring device and substation data management system: to the real-time collection and the real time monitoring of the information such as operation winding temperature, pasta temperature, transformer pasta position, Gas in Oil of Transformer content, partial discharge of transformer amount, transformer core earth leakage electric current or arrester ground leakage current of transformer; According to each on-Line Monitor Device CPU result relevant apparatus is controlled; Realtime Alerts when system breaks down; When data exception occurring, analyze automatically, and the control calibration, diagnose out of order real causes, report to the police again; The various parameters of antithetical phrase station administration and acquisition software are inquired about, are provided with, modification etc.; Communication modes, transfer rate, communication interface are provided with and central station data acquisition and process software, central station system engineering software carry out data communication, finish the transmission of data.
Specifically describe below by the extraction of above-mentioned monitoring device realization the transformer operation information:
(1) extract winding temperature and pasta temperature information by winding temperature and pasta device for detecting temperature:
The height of winding temperature directly affects transformer's life span, hot spot temperature of winding is measured very necessary.The measuring method of hot spot temperature of winding is mainly the thermal simulation mensuration at present.One that need measure based on the thermal simulation mensuration of load current is load current, and another is the upper strata oil temperature of transformer.The thermometer bulb that utilization is arranged on the fuel tank top is accepted the pasta temperature information of transformer, and the serviceability temperature converter is converted into 4～20mA current signal or the output of 0～5V voltage signal with temperature information then.The Transformer Winding temperature is to have superposeed on pasta temperature basis and the corresponding part temperature rise of load current, and winding temperature information also can be converted into the voltage signal output of 4～20mA current signal or 0～5V.
(2) extract the pasta positional information by transformer pasta position monitoring device:
Pasta to transformer just monitors, is when variation of ambient temperature or product load change, the oil conservater inner oil shortage to take place, or the transformer oil phenomenon of overflowing outward.When the transformer oil volume varies with temperature and harmomegathus takes place, be arranged on the variation that the pasta upper floating ball can be responded to fuel head.By the running part and the converting member of mechanism, the variation of pasta position is converted into the current signal output of 4～20mA.
(3) by gas content information in the Gas in Oil of Transformer content monitoring device stripping oil:
When there was internal fault in oil-filled electrical equipment, the gaseous species of generation, the content of all gases and gas production rate were all inequality, and promptly different fault types has different characteristic gas.Utilize this relation, the operation of surveillance equipment, judgment device latency fault has become the indispensable means of oil-filled electrical equipment safe operation that ensure.
Transformer is under normal operating temperature, and the gas content in the oil is very low.When transformer existed hot fault or discharge property fault, under thermal field or electric field action, the transformer oil of being made up of the different molecular weight hydrocarbon and mainly constitute insulating board by cellulose and all cracking can take place, these pyrolysis products generate H by complicated chemical reaction
2, CH
4, C
2H
6, C
2H
4, C
2H
2, CO, CO
2Seven kinds of characteristic gas, and the content of all gases is relevant with cracking temperature.According to the time cycle extraction transformer oil sample of setting, by the degassing processing gas in the oil is separated, can analyze its each component concentration size, and the variation of each component gas content also can be with the form output of electric signal.
As shown in Figure 2, On-Line Monitor Device of Gas utilization gas and oil separating plant is separated the gas in the transformer oil in the oil, and be kept in the memory storage, the using gases decomposer is separated gas with various then, utilize gas sensor that gas signal is converted to electric signal again, ac signal is converted to dc signal, give central station data monitoring analytic system again and carry out data computation and analysis, finally draw transformer insulated situation, for relevant personnel's reference or as the diagnostic system input signal, when insulation status jeopardizes safe operation, can send alerting signal.
(4) extract arrester ground leakage current information by transformer arrester ground leakage current monitoring device:
Transformer is carried out status surveillance with lightning arrester, can judge whether lightning arrester breaks down, and then provide reliable guarantee for the safe operation of transformer.Transformer comprises two aspects with the running state information of lightning arrester, the discharge time of first lightning arrester, and it two is leakage currents of lightning arrester.By in the arrester ground loop, current transformer being set, can extract the leakage current of lightning arrester, and through teletransmission after the proper transformation.The discharge time of lightning arrester can use the electromagnetic discharge counter to carry out record.
(5) extract iron core grounding leakage current information by transformer core earth leakage electric current monitoring device:
The change of transformer core ground current is big, is indicating that may there be multipoint earthing in iron core, and is further causing the local overheating of transformer.The extracting mode of transformer core ground current is identical with the extracting mode of leakage current of an arrester, can be used in the mode that current transformer is set in the ground loop and realize.
(6) extract shelf depreciation information by the partial discharge of transformer monitoring device: along with the raising of power equipment electric pressure and the widespread use of various insulating material, the shelf depreciation problem of power equipment is more and more outstanding.Shelf depreciation is the sign of apparatus insulated deterioration, is again the major reason that causes insulation degradation.The inner contingent shelf depreciation of transformer, the safe operation of transformer in serious threat, and shelf depreciation is carried out effective off-line or online detection is significant for the safe and stable operation of power equipment.
Transformer internal discharge process can be attended by such as phenomenons such as electromagnetic wave, sound wave, light wave, heat and chemical changes.As shown in Figure 3, the utility model mainly adopts superfrequency method (UHF) to carry out the partial discharge of transformer on-line monitoring, UHF method principle and ultrasonic Detection Method principle are similar, and it receives the UHF electromagnetic wave of local discharge process radiation by antenna sensor, realize the detection of shelf depreciation.The characteristics of this technology are: the detection frequency range is higher, the detection bandwidth.The dielectric strength of transformer oil diaphragm structure is than higher, and its shelf depreciation can inspire very high-frequency electromagnetic wave (a few GHZ) in theory.So the UHF method can " be avoided " interference of a lot of electromagnetic interference (EMI) and environment, and sensitivity is fine.Carry out amplitude and discharge time statistics according to the electromagnetic wave that receives in out of phase, and then discern fault type and position.
Move the communication setting that on-the-spot substation data acquisition system (DAS) need be correlated with for each on-Line Monitor Device of transformer, comprise theing contents are as follows:
Website is provided with: the information of website is set, comprises site name, and station code, SIM card number, this has important effect in data communication process, be used to identify website.
Passage is provided with: pairing various item codes of different projects and project name are set.Set project here, so that can discern project by the numbering of passage in the data transmission in future.
Report to the police and be provided with: the extreme value of warning is set, when the data that collect surpass extreme value, just sends warning message from the trend central station.
Remaining also has the data unit setting, the status code setting, and communication setting, parts are provided with etc.
After click data is gathered, just begin to carry out automatically data acquisition, on average carried out a data acquisition in per 30 seconds, gather next data storage in database, each hour carried out secondary data processing, and the data of gathering are processed into hour data, stores in the database.
Manufacturer's central station data monitoring analytic system includes manufacturer's central station data acquisition server, manufacturer's central station client-server and manufacturer's telemonitoring electronic curtain.Manufacturer's central station data acquisition server is the core of total system, is the terminal of total system data transmission, and it is responsible for the communications and data transmission with manufacturer's central station client-server and substation management system.The tcp data segment of manufacturer's central station data acquisition server is designed as an independent part,, improved the cohesion of system in case system goes wrong or need carry out system upgrade the time, can operate separately.
As shown in Figure 4, the file transfer between manufacturer's central station data acquisition server and the substation data acquisition system (DAS) adopts self-defined message to carry out data transmission, and the data transmission between manufacturer's central station client-server adopts XML file transfer form.The flow process of the data acquisition of total system is: manufacturer's central station client-server sends instructions to manufacturer's central station data acquisition server, instruction is transmitted with the XML form, manufacturer's central station data acquisition server is resolved the XML file of receiving, definite content that needs the information of collection, the XML file is resolved to the data acquisition instruction again, send to the GPRS module of acquisition terminal by GPRS network, the substation data acquisition system (DAS) receives instruction by the GPRS module, and instruction resolved, obtain the information of the content of needs collection, the substation data acquisition system (DAS) is extracted the information that needs from database then, and again it is resolved to the form that message is instructed, send to manufacturer's central station data acquisition server by the GPRS module.After manufacturer's central station data acquisition server receives the message instruction, the message instruction of receiving is resolved to the XML file layout, and be transmitted to the manufacturer's central station client-server that proposes the collection request, manufacturer's central station client-server is after receiving the XML file, it is resolved to the information that can show, deposit database in, perhaps be presented on the client software.
The data transmission scheme of radio communication mainly is divided into two kinds at present, and a kind of is to carry out data transmission by private network, and as radio frequency data radio station and WLAN (wireless local area network), another kind is by public wireless communication network, as GPRS, and cdma network.The advantage of utilizing private network be networking convenient, use simply, but that shortcoming is a transmission range is limited.In order to realize broad distribution long distance wireless data transmission, must adopt wireless transmission scheme based on public network.Higher in view of the degree of ripeness of CDMA 1X/GPRS network, coverage rate is wider, thereby CDMA 1X/GPRS network is chosen as the communication infrastructure of this radio communication overall plan.
IP-based data transfer mode is that CDMA 1X/GPRS system is distinctive, and most crucial content is the conversion of ICP/IP protocol.The advantage of IP-based data transfer mode is that the cost of data transmission is lower, real-time is better, shortcoming is that terminal uses complexity higher, but the networking plan dirigibility of this transmission mode is better, the speed of data transmission is higher, data volume is bigger, is fit to various to the real-time remote radio data transmission system that has certain requirements.
Below be example to adopt mobile GPRS wireless communication networks, use fixed ip address or to mobile operator request for data special line as central station data acquisition server (host computer), realize point-to-point, point-to-points data transmission.As shown in Figure 5, be example with the individual data acquisition module, data have been described after data collecting module collected, transmit by GPRS wireless network and Internet, finally arrive the communication process of manufacturer's central station data acquisition server.Data acquisition module links to each other by RS232 with the GPRS terminal, GPRS terminal dialing is automatically landed GPRS network, after obtaining mobile subnetwork IP address, initiatively set up Socket and be connected and keep, then ID number of the GPRS terminal and subnet of ip address are sent to manufacturer's central station data acquisition server by ICP/IP protocol with the manufacturer's central station data acquisition server (host computer) that inserts Internet.Manufacturer's central station data acquisition server connects under the situation about keeping at Socket like this, just can realize with GPRS terminal, just the communication of data acquisition module.It is simple that this scheme has networking, stable performance, reliability height, advantage such as user's use difficulty is low, and the dirigibility of use is strong.
In native system, use static IP at manufacturer's central station data acquisition server end, and in advance with in this static IP writing module.Like this GPRS terminal module just can be after energising IP and central station data acquisition server by manufacturer's central station data acquisition server end of writing in advance connect, the temporary ip address that obtains is informed manufacturer's central station data acquisition server, realize both connections.
Concrete communication step is as follows:
1. data are gathered required data according to acquisition module, are sent to the GPRS module;
2. the GPRS module is responsible for data are carried out the ICP/IP protocol conversion, and the form with the GPRS packet is sent to the GPRS wireless base station again;
3. data send to GPRS serving GPRS support node (SGSN) by the GPRS wireless base station;
4. SGSN and GGSN (GGSN) communicate, and GGSN carries out data to send to Internet after the respective handling;
5. adopt fire wall between Internet and manufacturer's central station data acquisition server, to isolate, guarantee safety of data.
6. manufacturer's central station data acquisition server inserts Internet, receives the data of passing back.For guaranteeing the reliability service of wireless network transmissions, native system adopts heartbeat and goes offline with reference to two kinds of mechanism.
Although GPRS has online always characteristics, when the GPRS line duration is long when not transmitting data, the data service priority level can be reduced automatically, lost line occurs through regular meeting.This problem can be solved by the setting of heartbeat.Heartbeat mechanism is a kind of means of path between testing server and the GPRS module.Enable the heartbeat setting, after module was reached the standard grade, according to certain time interval timed sending packet, after either party received the other side's heartbeat, all former state was returned at run duration.The priority of module self is not lowered, keeps online for a long time.If overtime is not received heartbeat, then restart module, insert GPRS network.
Because manufacturer's central station data acquisition server itself, the situation that has server failure or shutdown occurs.In this case, can occur can not receive the situation of heartbeat equally, not go offline, can solve this problem by the setting of the reference that goes offline but reason is a module self.The reference that goes offline is to provide test whether the wireless means that go offline take place to terminal.Employing goes offline with reference to mechanism, can select the gateway of GPRS network inside or router as wireless reference point, uses the PING operation in the ICMP agreement during test.Enable and go offline with reference to being provided with, after module is reached the standard grade, can be voluntarily according to the cycle PING reference point of setting, and determine whether the reset processing that goes offline by test result.
Adopt heartbeat simultaneously and go offline and both can avoid the wireless generation that goes offline with reference to two kinds of mechanism, can avoid manufacturer's central station data acquisition server fault or shutdown again after, cause that module error ground thinks wireless going offline, carry out meaningless reset processing.Specifically, after module was reached the standard grade, whether the heartbeat of sending by module had response to determine whether radio path is normal.If overtime is not received the heartbeat response, then the reference point of the prior setting of PING.If can't lead to by P NG, illustrate between GPRS module and the reference point to go wrong, be likely because module is wireless to go offline.If can lead to by PI NG, but still can not receive heartbeat, illustrate that network itself is no problem, may be manufacturer's central station data acquisition server faults itself.
Each on-Line Monitor Device of moving on-the-spot substation data acquisition system (DAS) is launched the wireless network into GPRS by the GPRS wireless communication module after with the service data acquisition process.After the login of GPRS module, the message of real-time listening manufacturer central station data acquisition server, when will carry out data sending request, manufacturer's central station data acquisition server sends a data sending request instruction to the substation, after the GPRS module receives the data sending request instruction, from the controller database of substation, extract corresponding data, and then be sent to manufacturer's central station data acquisition server via the GPRS module, and in real time data are imported into the large-scale electronic curtain of transformer production merchant remote monitroing center, realize remote real-time monitor, real-time abnormal alarm, the remote parameter inquiry, operational report and inquiry, ruuning situation at on-the-spot each on-Line Monitor Device of operation is carried out telemonitoring and diagnosis, make the manufacturer in the very first time, find the latency fault of high-tension electricity gas device interiors such as transformer, for equipment safety operation provides reliable basis.Form various operation form reports and statistical summaries is carried out in various operations and control data according to the management work needs, and inquire about in every way and print.
Claims (4)
1. transformer online monitoring and manufacturer's Long-Range Surveillance System based on a wireless transmission, it is characterized in that, include the on-the-spot substation data acquisition system (DAS) of the operation that connects by public wireless communication networks and manufacturer's central station data monitoring analytic system, the on-the-spot substation of described operation data acquisition system (DAS) includes transformer operation winding temperature and pasta temperature on-line monitoring device, transformer pasta position on-Line Monitor Device, Gas in Oil of Transformer content on-Line Monitor Device, partial discharge of transformer amount on-Line Monitor Device, transformer core earth leakage electric current on-Line Monitor Device and arrester ground On-line Monitoring of Leakage Current device, described manufacturer's central station data monitoring analytic system includes manufacturer's central station data acquisition server, manufacturer's central station client-server and manufacturer's telemonitoring electronic curtain, described each on-Line Monitor Device and manufacturer's central station data acquisition server, information transmission by public wireless communication networks between manufacturer's central station client-server connects, and manufacturer's central station data acquisition server is connected by data line with manufacturer's telemonitoring electronic curtain.
2. a kind of transformer online monitoring and manufacturer's Long-Range Surveillance System based on wireless transmission according to claim 1 is characterized in that, by the manufacturer operation conditions of its equipment manufactured thereby are monitored in real time, are a kind of Service Management pattern of innovation.
3. a kind of transformer online monitoring and manufacturer's Long-Range Surveillance System based on wireless transmission according to claim 1, the on-the-spot substation of described operation data acquisition system (DAS) is in order to realize to the real-time collection of transformer operation information and real time monitoring, to the operation control of each transformer operation information monitoring device, to the real-time abnormity diagnosis of system and warning, the inquiry to various parameters, setting, modification.
4. a kind of transformer online monitoring and manufacturer's Long-Range Surveillance System based on wireless transmission according to claim 1, described manufacturer's central station data monitoring analytic system is in order to realize that the remote real-time monitor, remote live abnormal alarm, remote parameter inquiry, the various operational reports of generation that move on-the-spot each transformer operation information monitoring device are imported into manufacturer's telemonitoring electronic curtain for inquiry and printing, real time monitoring information synchronization.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101777798A (en) * | 2010-02-10 | 2010-07-14 | 山东泰开变压器有限公司 | Wireless transmission-based transformer online monitoring and manufacturer remote monitoring system |
| CN102680866A (en) * | 2012-05-22 | 2012-09-19 | 李朝晖 | Real-time online early warning device and method for insulation faults of transformer |
| CN102981084A (en) * | 2012-12-07 | 2013-03-20 | 深圳市双合电气股份有限公司 | Comprehensive monitoring system for electric power system transformers |
| CN103472328A (en) * | 2013-09-05 | 2013-12-25 | 山西省电力公司大同供电分公司 | Power distribution fault monitoring system |
| CN103576057A (en) * | 2012-07-19 | 2014-02-12 | 华东交通大学 | On-line insulation monitoring system and on-line insulation monitoring method |
| CN105510732A (en) * | 2015-11-26 | 2016-04-20 | 国家电网公司 | Power transformer monitoring system and method |
| CN109000719A (en) * | 2018-06-19 | 2018-12-14 | 南通市海王电气有限公司 | Transformer online monitoring system based on Internet of Things |
| CN117723917A (en) * | 2024-02-07 | 2024-03-19 | 国网山西省电力公司太原供电公司 | Monitoring application method based on optical fiber extrinsic Fabry-Perot type ultrasonic sensor |
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2010
- 2010-02-10 CN CN201020129792.XU patent/CN201637794U/en not_active Expired - Fee Related
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| CN101777798A (en) * | 2010-02-10 | 2010-07-14 | 山东泰开变压器有限公司 | Wireless transmission-based transformer online monitoring and manufacturer remote monitoring system |
| CN102680866A (en) * | 2012-05-22 | 2012-09-19 | 李朝晖 | Real-time online early warning device and method for insulation faults of transformer |
| CN102680866B (en) * | 2012-05-22 | 2014-05-14 | 李朝晖 | Real-time online early warning device and method for insulation faults of transformer |
| CN103576057A (en) * | 2012-07-19 | 2014-02-12 | 华东交通大学 | On-line insulation monitoring system and on-line insulation monitoring method |
| CN103576057B (en) * | 2012-07-19 | 2016-01-13 | 华东交通大学 | Insulated on-line monitoring system and method |
| CN102981084A (en) * | 2012-12-07 | 2013-03-20 | 深圳市双合电气股份有限公司 | Comprehensive monitoring system for electric power system transformers |
| CN102981084B (en) * | 2012-12-07 | 2015-04-22 | 深圳市双合电气股份有限公司 | Comprehensive monitoring system for electric power system transformers |
| CN103472328A (en) * | 2013-09-05 | 2013-12-25 | 山西省电力公司大同供电分公司 | Power distribution fault monitoring system |
| CN105510732A (en) * | 2015-11-26 | 2016-04-20 | 国家电网公司 | Power transformer monitoring system and method |
| CN109000719A (en) * | 2018-06-19 | 2018-12-14 | 南通市海王电气有限公司 | Transformer online monitoring system based on Internet of Things |
| CN117723917A (en) * | 2024-02-07 | 2024-03-19 | 国网山西省电力公司太原供电公司 | Monitoring application method based on optical fiber extrinsic Fabry-Perot type ultrasonic sensor |
| CN117723917B (en) * | 2024-02-07 | 2024-05-03 | 国网山西省电力公司太原供电公司 | Monitoring application method based on optical fiber extrinsic Fabry-Perot type ultrasonic sensor |
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