CN1306274C - On-line monitoring method for transformer - Google Patents
On-line monitoring method for transformer Download PDFInfo
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- CN1306274C CN1306274C CNB031403441A CN03140344A CN1306274C CN 1306274 C CN1306274 C CN 1306274C CN B031403441 A CNB031403441 A CN B031403441A CN 03140344 A CN03140344 A CN 03140344A CN 1306274 C CN1306274 C CN 1306274C
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Abstract
The present invention relates to an on-line monitoring method for a transformer. In order to overcome the defects of the existing on-line monitoring method for a transformer, an operator can rapidly and fully transfer and browse monitoring data and variation tendencies, the daily work is completed, and the centralized management and the monitoring of the present invention and other systems in the same platform can be realized. The present invention collects monitored signals of a transformer, and monitoring data is generated; the monitoring data is transmitted to an on-line monitoring terminal in real time to be browsed and analyzed; simultaneously, the monitoring terminal is used for transmitting the monitoring data to a remote database sever in real time, the monitoring data is stored, and thus, an expert or a remote user can browse and analyze the monitoring data through a Web server connected with the database sever. In the former period, an RS232 serial communication protocol and a Modbus data transmission switch control protocol are used for transmitting data, and the monitoring terminal adopts a framework type monitoring operation interface; in the later stage, an Internet transmission control protocol is used for transmitting data.
Description
Technical field
The present invention relates to the monitoring technology of power transformer, more particularly, relate to a kind of Integrated on-line monitoring method of transformer, this method can be used for the transformer online monitoring data are handled and managed, and mainly uses but is not limited to monitoring to gas concentration in the transformer oil sample and evolving trend.
Background technology
As supplying important nucleus equipment in the power transformation circuit, the normal operation of power transformer is directly connected to the every aspect of national product and life.To fault detect, the maintenance of transformer, be to ensure the requisite work of the normal operation of supply network.
At the fault that causes transformer normally to move---make moist, overheated, the aging overall failure that causes; The local fault that arc discharge, shelf depreciation cause etc.Power industry existing comparatively ripe detection method for maintaining and working routine.For example, in the pilot project and test routine of Chinese Industrial Standards (CIS) " DL/T596-1996 power equipment preventive trial rules " regulation, mainly comprise stratographic analysis, direct current resistance detection, insulation resistance and absorptance, polarization index detection, the detection of insulating medium angle of loss tangent, oily detection, Partial Discharge Detection and the dielectric voltage withstand test etc. of gas.These fault detection methods all are to be that the fixed point that benchmark regularly carries out detects with time, are sense cycle with 3 months to 1 year generally.This mode is powerless to the fast fault of evolving speed, can't accomplish fully to check erroneous ideas at the outset, prevent trouble before it happens.
In order to raise the efficiency and benefit, a kind of new mode based on state-maintenance---on-line monitoring more and more comes into one's own.The starting point of this real time on-line monitoring and traditional fault detect and employing method, and the effect of being brought into play has bigger difference.On-line monitoring can not influence under the monitored transformer normal operation precondition, analyzes the operation conditions of transformer by the continuous sampling to reflection transformer operation conditions quantity of state.In addition, on-line monitoring also can be on a large amount of existing monitoring historical datas basis, by the analysis that Monitoring Data is changed, infers that transformer inside may be or variation of breaking down or evolving trend, for the user in time provides the firsthand information.Therefore, in some sense, on-line monitoring and current experiments chamber fixed point detects both and complements each other, and the former provides information timely for the latter, and the latter confirms and replenishes the former testing result.Making full use of of on-line monitoring technique, the fault of transformer can be found and discern to one side in time.On the other hand, Monitoring Data utilize degree height, wide application, can reduce the fixed point that transformer is carried out and detect and maintenance frequency, reduce operating cost, prolong transformer serviceable life, reduce because of the influence of interruption maintenance the power transmission and transformation operation, increase the operation income.
As a kind of advanced person's state-detection mode, on-line monitoring is applied to that the transformer initial failure detects and diagnosis more and more comes into one's own and is accepted by people gradually, and is meanwhile also more and more higher to the requirement of the technology that adopted and means.
In U.S. Pat Patent 4,654,806, Thomas D.Poyser etc. discloses a kind of transformer online monitoring system based on microprocessor technology, can be described as the technology that early adopts the state-detection transformer fault.There is the instantaneous value of related parameter in this system according to the continuous detection of setting interval time and transformer load and operation conditions, and compares analysis with the pre-set parameter that reflects transformer state.According to the comparative analysis result, improve or reduce data acquiring frequency, when suggestion fixes a point to overhaul to equipment, or reduces operating load even out of service.This method image data comprises oil temperature, hot(test)-spot temperature, density of hydrogen, oil level, pressure etc.Though this technology has used microcomputer to realize on-line monitoring, it is not very deep analyzing with utilizing on the backstage of data.Mainly show, the one, Monitoring Data is not rationally classified, preserve and analyze as screening by sampling time interval.The 2nd, the storage of historical data is confined to minimum and maximum value, the displaying of historical data, browses with operating function and exists hardly.The 3rd, state variation tendency very important concerning the user is not provided.Therefore this system only plays the effect of a simple alarm.Can't provide comprehensive information in the transformer operational process to the user.
At U.S. Pat Patent 5,773,709, Jean-Pierre Gibeault etc. discloses on-line monitoring method and the instrument that a kind of internal system has the liquid heat convection current.This patented technology has made full use of the thermal effect of fluid on the one hand, portion has designed the periodicity heating arrangement that a cover impels detected fluid constantly to flow within it, so that make the tested oil sample and the transformer inside body oil sample basically identical on composition that arrive gas sensor, reduce the response time; A cover transformer online monitoring instrument that utilizes this technology and design is disclosed on the other hand.But it is in the generation of status data, shows and the analysis and utilization aspect, mentions basically.
In U.S. Pat Patent 6,289,716 B1, Stanley R.Lindgren discloses a kind of monitor failure gas of overflowing in the oil tank of transformer headroom and the method for indicating the transformer running status.This method has proposed all gases concentration of overflowing in a kind of on-line monitoring fuel tank headroom and the method for assessing the transformer operation conditions.But only resting on the real time data that shows that the transformer present located state and the present technique that adopts thereof obtain aspect Data Receiving, demonstration and the processing, can't have access to historical data and more can't directly see the variation tendency of previous stage and compare at same interface.
Summary of the invention
At the above-mentioned defective of prior art, the present invention will provide Integrated on-line monitoring method of transformer, so that allow the operator have access to and to browse Monitoring Data and variation tendency thereof fast, all sidedly, finishes the work of routine; Can realize with platform centered management and monitoring with other system again simultaneously.
The technical solution adopted for the present invention to solve the technical problems is: a kind of Integrated on-line monitoring method of transformer is provided, comprising following steps:
(1) gathers the monitored signal of transformer and generate Monitoring Data;
(2) described Monitoring Data is sent to the on-line monitoring terminal in real time, makes the online user browse and to analyze described Monitoring Data by described on-line monitoring terminal;
(3) described monitoring terminal is sent to distant place database server in real time with Monitoring Data again and preserves, and makes expert or long-distance user browse and to analyze described Monitoring Data by the Web server that is connected with described database server;
Wherein, in described step (1) and (2), adopt RS232 serial port communicating protocol and Modbus data transmission switch control protocol to finish the transmission of data; In described step (3), the data that adopt the internet transmission control protocol to finish transmit.
In the present invention, described Monitoring Data (or monitoring state data) comprises real time data and historical data, real time data is meant continuously the Monitoring Data that is generated by the signal transmitting device in real time and receive from the signal transmitting device, and historical data is meant the Monitoring Data in the past in the signal transmitting device internal memory database that download or that be stored in user's monitoring terminal.
In the step (1) of the method for the invention, gather the monitored signal of transformer and generate Monitoring Data by the signal transmitting device; In described step (2), by communication controller, the on-line monitoring terminal receives and downloads described Monitoring Data in real time; Described signal transmitting device, communication controller and on-line monitoring terminal are each other based on RS-232 serial port communicating protocol and described ModBus data transmission switch control protocol, by RS-485 network, Modem dial-up connection or the direct-connected mode of serial ports, finish data transmission and control, the on-line monitoring system of primordial plinth.
In the step (2) of the method for the invention, described monitoring terminal both can connect the signal transmitting device of many same types simultaneously, also can connect other monitoring equipments simultaneously, and can directly browse and analyze Monitoring Data.In described step (2), Monitoring Data is saved in the local data base of monitoring terminal, to realize first order monitoring, i.e. field monitoring; Described step (3) then realizes second level monitoring, i.e. expert's monitoring.
In the step (2) and (3) of the method for the invention,, point out the supvr to handle accordingly when Monitoring Data meets or exceeds the alert levels setting value, also, will report to the police automatically by predetermined way during the time above the delayed filtering of setting; Described alert levels setting value comprises lower first order alarm setting value and higher second level alarm setting value; When described monitoring system or and communication line when breaking down, also carry out corresponding system alarm or communication failure and report to the police.Wherein, described Monitoring Data can be water cut, oil temperature or the load current etc. in transformer failure gas parameter, the oil.
According to method of the present invention, in described monitoring terminal, finish the demonstration and the operation of data by the frame-type interface, described frame-type interface comprises Control-Menu hurdle, shortcut bar, system state hurdle, display mode control group and data type sign hurdle; Also comprise real time data viewing area, data display district, mouse point data viewing area and choice of equipment district.According to method of the present invention, in described real time data viewing area and data display district, can adopt the mode that is similar to pattern to show Monitoring Data, described figure is adjusted its picture over time and automatically; Also can adopt to be similar to the Excel of Microsoft tabulation mode and to show Monitoring Data, make the user on this interface, carry out secondary treating and analysis data.Described real time data and historical data can be switched mutually at any time, and do not influence reading of real time data.
According to method of the present invention, in described choice of equipment district, adopt the tree-like view that is similar to the window explorer mode to finish the same platform monitoring and the operation of multiple project, multiple devices, several data; Wherein monitored equipment user, transformer station, monitoring project, transformer are used as " file " respectively and " file " carries out hierarchical management and control; During operation, the user need only use click institute monitoring equipment simply, the data of devices selected and monitoring project can be called in the data display district and browse and operate.
According to method of the present invention, different according to the requirement of monitoring project in described monitoring terminal with data type, Monitoring Data is divided into different classes also stores respectively, and in the Control-Menu hurdle, define respectively; The user need only carry out selection operation simply on the Control-Menu hurdle when having access to data, needed data can be called in the corresponding display field, thereby number of different types data display view and control method are provided.When the pattern display mode, the user can select 1-3 kind data to show simultaneously from several data and browses by the Control-Menu hurdle.
According to method of the present invention, in the shortcut bar at frame-type interface, provide shortcuts such as " homepage ", " go up page or leaf ", " nextpage ", " endpage ", " preceding turning over ", " afterwards turning over ", the user can to the displaying of Monitoring Data and be browsed to select at times to browse with analyzing and processing by the page operate.Also provide " stretching ", " compression " shortcut, the user can be screened historical data browse and analyzing and processing.
Method of the present invention has solved the deficiency of similar other transformer online monitoring system and methods on data display and data mining capability, fully use microcomputer advanced person's multilayer distributed database management technology, menu technique, image shows technology and internet communication technology, multitask multithreading, both the person of being convenient to operation had access to and browsed Monitoring Data and variation tendency thereof fast, all sidedly, finish the work of routine, can realize with platform centered management and monitoring with other system again.The present invention enriches Internet resources by means of what the internet provided, and field monitoring and expert's monitoring platform of two kinds of different rights is provided, and on-line monitoring is extended to the synchronous on-line monitoring of remote live truly of no region restriction.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the structural drawing of transformer remote live on-line monitoring system among the present invention;
Fig. 2 is the workflow diagram of transformer remote live on-line monitoring system;
Fig. 3 is a data processing man machine operation interface control synoptic diagram;
Fig. 4 is a transformer real time on-line monitoring terminal software man machine operation interface layout frame diagram;
Fig. 5 is transformer on-line real time monitoring Data Receiving and processing communication resources scheduling synoptic diagram;
Fig. 6 is a synoptic diagram of showing transformer failure gas monitoring real time data with the oscillograph mode;
Fig. 7 is the synoptic diagram that the Microsoft Excel mode is showed transformer failure gas monitoring real time data;
Fig. 8 is that transformer fault detects and the warning processing flow chart.
Embodiment
The invention provides a kind of new method of handling and managing at the transformer online monitoring data.Comprise that the monitoring state data generate, remote real-time data receives, stores, browses and analyzes etc., for expert system provides efficient platform etc.Wherein, status data reads from sensor usually, failure gas with transformer inside is an example, for example hydrogen (H2), carbon monoxide (CO), acetylene (C2H2) and ethene (C2H4) etc., the original signal of monitoring is provided by gas sensor, gas sensor comprises fuel cell/electrochemical sensor, metal-oxide semiconductor (MOS), transition metal gate field-effect, thermal conductance and infrared sensor etc.These signals in microprocessor according to predefined algorithm computing, produce the data that can reflect the transformer fault condition---failure gas concentration and variation tendency, as gas concentration, hour variation tendency, diurnal variation trend etc., thereby realization is to the on-line real time monitoring of transformer.Status data be except being the fault gas concentration, also can be other state parameter of transformer, as the humidity of insulating oil, and the oil temperature of top and bottom, load current etc.
In the method for the present invention, the remote monitoring Data Receiving, store, browse and analyze by a whole set of transformer online monitoring system and equipment and realize.As shown in Figure 1, total system is divided by seven parts by function and is formed, and comprising:
1) signal generates 10;
2) signals collecting and Monitoring Data generate 11;
3) transmission control or Communication Control 12;
4) HOST remote online monitoring terminal software 13;
5) database server 14;
6) Web server 15; And
7) all kinds of long-distance users 16..
As shown in Figure 2, with the failure gas in the monitoring transformer 20 is example, the failure gas that produces because of transformer fault flows to the valve 20a that reaches transformer by the oil of transformer inside, thereby finishing aforesaid signal by the valve 20a arrival sensor of transformer again and generate step, is the signal transmitting device 21 that is used to finish aforementioned signal sampling and Monitoring Data systematic function then successively, be used to finish the Communication Control case 22 of transmission control, and user monitoring software (HOST) 23, monitor database 24, expert system application logic (Web) 25 and expert clients (Expert) 26.
Wherein, gas sensor 21a is directly connected on the valve 20a of transformer 20, and signal transmitting device 21 is made up of gas sensor 21a and microprocessor 21b.Signal transmitting device 21, communication controller 22 and user monitoring software 23 are each other based on RS-232 serial port communicating protocol and industrial general ModBus data transmission switch control protocol 17, direct-connected exchanges data, transmission and the system of finishing controls by RS-485 network, Modem dial-up connection or serial ports, belongs to the infrastructure device of total system.
Expert system application logic and client are based on internet transmission control protocol (TCP/IP and Http) 18, and distributed multi-layer data library management realizes technology, realization detects based on the remote live truly of internet, the expert need not directly arrive on-the-spot, also need not do lot of data and receive and put in order, system accesses relevant data the research and analysis for the expert according to the fault diagnosis knowledge accumulation automatically according to preset rule from database server 24.Between infrastructure device and the expert system equally based on internet transport protocol 18, by the field monitoring terminal automatically the transcription of real-time reception data in the expert system database.Different with user HOST 23 is that Monitoring Data can only be browsed and analyze to expert system 26, can not directly control and the operation monitoring terminal.
As shown in Figure 3, this method provides a kind of frame-type policer operation interface, shows that data content is comprehensively abundant, the simple and practical convenience of control mode.
As shown in Figure 4, the whole interface framework is according to different four districts, five hurdles that are divided into function of displaying contents, specifically comprise Control-Menu hurdle 51, shortcut bar 52, system state hurdle 53, type identification hurdle 56 and display mode control group 55, and tree-like choice of equipment district 54, real time data viewing area 57, mouse point data viewing area 58 and data display district 59.
The user can be from data source 30, data type 43 (comprising real-time Monitoring Data, short-term history data, long history data, historical events data and historical service log), data items 39 (comprising failure gas concentration, hour variation tendency, diurnal variation trend, sensor temperature, heter temperature, heater power, original signal amount, original concentration etc.) and 31 4 angles of current monitoring terminal, optionally with the monitoring result data display in framework interface shown in Figure 4, monitor, browse, analyze and handle.
Abundant maintenance data segmentation of whole interface and paging control technology provide two kinds of modes of browsing and showing data, i.e. the tabulation 46 of the figure 45 of oscillograph mode and Microsoft Excel mode.Dual mode angle difference, effect difference are replenished mutually, bring out the best in each other, and make interface operation very simple, directly perceived and practical.
Fig. 6 is that figure, Fig. 7 of a typical oscillograph mode is the tabulation of a typical Microsoft Excel mode.The figure 45 compatible sound two states of oscillograph mode, its dynamical fashion has been given full play to advantage and the characteristics of oscillograph in detection; And tabulation mode 46 adopts the Excel plug-in part technology, can carry out secondary operation.
As shown in Figure 5, this method is fully used OO technology and means aspect Data Receiving, on ModBus exchanges data 17 bases between HOST 23 and the transmitter 21, be provided with special serial communication resource scheduling management device 64, be responsible for the data transceiver is controlled automatically and managed.Manager is the user of 10 different stages and authority with the application definition of access means, uses warrant to manage to its utilization.The user 64a that proposes the application of visit monitoring equipment can not directly visit communication apparatus and resource before not obtaining to use warrant 65, can only enter waiting list queuing 66.Only in formation, during not than the high user of its rank and authority, just can obtain the warrant that manager distributes, finish visit monitoring terminal.This resource management task dispatcher has guaranteed that multi-task and multi-user simultaneously to the realization of monitoring equipment real time access, does not have conflict, and response is to realize that the many equipment of many serial ports detect important foundation simultaneously in time.
This method has proposed a kind of tree-like view selection technology that is similar to window explorer on above-mentioned technical foundation, realize that whole transformer all devices and parameter are with the mode of platform with monitoring.This mode is fully used operating system multitask, multithreading, has realized that many serial ports, hyperchannel visit multiple monitoring equipment, a kind of feasible embodiment of the power station synthetical automation of can yet be regarded as simultaneously.
In this method,, the warning of transformer being divided into the alarm of two kinds of different stages according to the failure gas generation size and the extent of injury---high and superelevation is reported to the police, and provides multiple monitoring, alarming and corresponding manner and means to select for use for user's operation, as shown in Figure 8.The user can set voluntarily to the alarming value of two kinds of different stages.At the characteristics of reporting to the police and processing procedure generally will be passed through fault generation, alarm detection and transmission, warning, warning processing four-stage.This method adopts suitable delayed filtering on the one hand, greatly reduces the probability that occurs because of phenomenons such as spurious alarm that non-transformer fault factors such as environment, electric, communication cause, false alarms, has guaranteed the true, accurately, in time of monitoring, alarming.On the other hand, provide strict warning to confirm program, each link of total system all possesses reports to the police and lock function.In case alarm generation must have operating personnel's artificial affirmation, will continue otherwise report to the police always.With Fig. 8 is example, after true and reliable warning is detected, signal transmitting device 21 at first responds, and data display screen transfers alarm condition 70a to by normal condition immediately---current warning project of roll display and alarm condition value, and till this warning obtains confirming 72a or 72c.Simultaneously, generate alert event and be recorded in the historical events database, and alerting signal is transferred to communication controller 22.After communication controller receives warning message, start warning light 70b immediately, and lock the on-the-spot artificial 72b of affirmation of the operator on duty that reports to the police.Monitoring terminal---HOST 23 ejects warning window 70c after monitoring the warning of signal transmitting device immediately, utilizes interface color, animation and audio function to enter alarm condition, and the wait operating personnel report to the police and confirm 72c.
This method is not only carried out fault condition to transformer and is detected, and also possesses oneself state monitoring and sensor self-checking function, and according to the difference of alarm source, warning is divided three classes---Monitoring Data warning, system alarm and communication failure warning, handle respectively.
Claims (11)
1, a kind of Integrated on-line monitoring method of transformer is characterized in that, may further comprise the steps:
(1) gathers the monitored signal of transformer and generate Monitoring Data;
(2) described Monitoring Data is sent to the on-line monitoring terminal in real time, makes the online user browse and to analyze described Monitoring Data by described on-line monitoring terminal;
(3) described monitoring terminal is sent to distant place database server in real time with Monitoring Data again and preserves, and makes expert or long-distance user browse and to analyze described Monitoring Data by the Web server that is connected with described database server;
Wherein, in described step (1) and (2), adopt RS232 serial port communicating protocol and Modbus data transmission switch control protocol to finish the transmission of data; In described step (3), the data that adopt the internet transmission control protocol to finish transmit.
2, method according to claim 1 is characterized in that, in described step (1), is gathered the monitored signal of transformer and is generated Monitoring Data by the signal transmitting device; In described step (2), by communication controller, the on-line monitoring terminal receives and downloads described Monitoring Data in real time;
Described signal transmitting device, communication controller and on-line monitoring terminal are each other based on RS-232 serial port communicating protocol and described ModBus data transmission switch control protocol, by RS-485 network, Modem dial-up connection or the direct-connected mode of serial ports, finish data transmission and control, the on-line monitoring system of primordial plinth.
3, method according to claim 2, it is characterized in that in described step (2), described monitoring terminal both can connect the signal transmitting device of many same types simultaneously, also can connect other monitoring equipments simultaneously, and can directly browse and analyze Monitoring Data.
4, method according to claim 3 is characterized in that, in described step (2), Monitoring Data is saved in the local data base of monitoring terminal, to realize first order monitoring, i.e. field monitoring; Described step (3) then realizes second level monitoring, i.e. expert's monitoring.
5, method according to claim 4, it is characterized in that, in described step (2) and (3), when Monitoring Data meets or exceeds the alert levels setting value, also surpasses the delayed filtering of setting during the time, to report to the police automatically by predetermined way, prompting the supvr handle accordingly; Described alert levels setting value comprises lower first order alarm setting value and higher second level alarm setting value; When described monitoring system or and communication line when breaking down, also carry out corresponding system alarm or communication failure and report to the police.
According to each described method among the claim 1-5, it is characterized in that 6, described Monitoring Data can be water cut, oil temperature or the load current in transformer failure gas parameter, the oil.
7, according to each described method among the claim 1-5, it is characterized in that, in the monitoring terminal of described step (2), adopt a kind of frame-type policer operation interface to finish the demonstration and the operation of data, described frame-type interface comprises Control-Menu hurdle, shortcut bar, system state hurdle, display mode control group and data type sign hurdle; Also comprise real time data viewing area, data display district, mouse point data viewing area and choice of equipment district.
8, method according to claim 7 is characterized in that, in described real time data viewing area and data display district, can adopt the mode that is similar to pattern to show Monitoring Data, and described figure is adjusted its picture over time and automatically; Also can adopt the mode that is similar to the Excel of Microsoft tabulation to show Monitoring Data, make the user on this interface, carry out secondary treating and analysis data.
9, method according to claim 7 is characterized in that, in described choice of equipment district, adopts the tree-like view that is similar to the window explorer mode to finish the same platform monitoring and the operation of multiple project, multiple devices, several data; Wherein monitored equipment user, transformer station, monitoring project, transformer are used as " file " respectively and " file " carries out hierarchical management and control; During operation, the user need only use click institute monitoring equipment simply, the data of devices selected and monitoring project can be called in the data display district and browse and operate.
10, method according to claim 7 is characterized in that, and is different with data type according to the requirement of monitoring project in described monitoring terminal, Monitoring Data is divided into different classes also stores respectively, and define respectively in the Control-Menu hurdle; The user need only carry out selection operation simply on the Control-Menu hurdle when having access to data, needed data can be called in the corresponding display field; When the pattern display mode, the user can select 1-3 kind data to show simultaneously from several data and browses by the Control-Menu hurdle.
11, method according to claim 7, it is characterized in that, in the shortcut bar at frame-type interface, provide shortcuts such as " homepage ", " go up page or leaf ", " nextpage ", " endpage ", " preceding turning over ", " afterwards turning over ", the user can to the displaying of Monitoring Data and be browsed to select at times to browse with analyzing and processing by the page operate; Also provide " stretching ", " compression " shortcut, the user can be screened historical data browse and analyzing and processing.
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| CNB031403441A CN1306274C (en) | 2003-08-27 | 2003-08-27 | On-line monitoring method for transformer |
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| CNB031403441A CN1306274C (en) | 2003-08-27 | 2003-08-27 | On-line monitoring method for transformer |
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| CN1306274C true CN1306274C (en) | 2007-03-21 |
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|---|---|---|---|---|
| CN102299554B (en) * | 2010-06-25 | 2013-09-11 | 苏州太谷电力有限公司 | Intelligent monitoring system of user transformer substation |
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| CN104867667B (en) * | 2015-06-03 | 2017-11-21 | 宁波仁栋电气有限公司 | A kind of intelligent oil-filled transformer, monitoring system and its monitoring method |
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| CN111030885A (en) * | 2019-12-06 | 2020-04-17 | 中国铁塔股份有限公司厦门市分公司 | Monitoring data extraction method and system for communication infrastructure |
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| CN114636885B (en) * | 2022-05-12 | 2022-08-09 | 佛山速敏智能仪器科技有限公司 | Transformer online detection system and detection method |
| CN116183774A (en) * | 2023-03-23 | 2023-05-30 | 中国华能集团清洁能源技术研究院有限公司 | Offshore platform transformer state monitoring system and method |
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| CN1591018A (en) | 2005-03-09 |
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