CN201138365Y - CVT on-line monitoring terminal - Google Patents
CVT on-line monitoring terminal Download PDFInfo
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- CN201138365Y CN201138365Y CNU2007201912096U CN200720191209U CN201138365Y CN 201138365 Y CN201138365 Y CN 201138365Y CN U2007201912096 U CNU2007201912096 U CN U2007201912096U CN 200720191209 U CN200720191209 U CN 200720191209U CN 201138365 Y CN201138365 Y CN 201138365Y
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Abstract
To solve the defect that the prior CVT monitoring products cannot judge the CVT abnormality on the site and immediately send the alarm signal, the utility model provides a CVT on-line monitoring terminal which includes a central processing unit CPU, and an A/D converting circuit module, a memory module, a man-machine interface module, an alarm output module, a remote communication module and a power module which are connected with the central processing unit CPU. All circuit voltages are converted by the A/D converting circuit module and then input to the central processing unit CPU; the central processing unit conducts alarming judgment to the voltage data according to a built-in alarm algorithm module as well as alarm parameters and other information stored in the memory module; after the alarming is confirmed, the alarm information is output by the alarm output module and the man-machine interface module; the remote communication module transmits the voltage information and the monitored alarm information collected by the terminal to a remote master station real time to give monitoring alarm.
Description
Technical field
The utility model relates to a kind of monitoring terminal, relates in particular to the voltage on-line monitoring and the abnormality alarming terminal that are used for electric system CVT equipment.
Background technology
Capacitance type potential transformer (Capacitor Voltage Transformer is hereinafter to be referred as CVT) is the developing history of existing four more than ten years abroad, is widely used in 72.5～800kV electric system.CVT has cost low (110kV and above product), can take into account the advantage of the two kinds of equipment of coupling condenser in voltage transformer (VT) and the power circuit carrier, reliable damping ferroresonance is arranged again in actual applications and possess good transient response characteristic etc., so application on power system increased day by day at home in recent years, not only on transformer station's line outlet, use, and extensive application replaces electromagnetic potential transformer on bus.
CVT may occur various abnormal conditions as bearing high-tension equipment in the operational process.But because CVT is hermetically sealed equipment, removes seepage oil, abnormal noise etc. take place, can be outside appearance more obviously show, other obstacles and defective, generally difficult directly perceived the discovery must take certain technological means could find operating possibility abnormal conditions as early as possible.From the work characteristics of CVT as can be known, CVT itself is a measurement instrument, and the amplitude of secondary voltage, phase place and waveform can reflect the operation conditions of equipment itself.Can utilize this condition in the actual motion, note monitoring, select rational comparison other, can more early find the abnormal conditions of CVT.
CVT monitoring product on the market substantially only possesses simple voltage data acquisition function at present, the CVT real-time voltage data of gathering is sent to distant place main website carries out voltage monitoring and alarm decision.But, promptly can interrupt supervision to CVT in case break down with communicating by letter of distant place main website because the method depends on communication line and communication protocol.In addition, the transmission of communication and main station judging and making a response is communicated to the scene again, and to have a regular hour poor, is unfavorable for the CVT unusual condition is in time judged and handled rapidly.
Summary of the invention
Can not judge and the on-the-spot deficiency of alarming CVT electric voltage exception situation in order to overcome existing CVT monitoring product, the utility model provides a kind of CVT on-line monitoring terminal, can not only gather supervision to the voltage of CVT, voltage data and failure message are real-time transmitted to long-range main website, and alerting signal can be judged and send immediately to terminal at the scene to the CVT abnormal conditions.
The technical scheme that its technical matters that solves the utility model adopts is: a kind of CVT on-line monitoring terminal, comprise: central processor CPU and the A/D change-over circuit module that is attached thereto, memory module, human-computer interface module, alarm output module, telecommunication module and power module, in central processing unit, be built-in with CVT voltage alarm monitoring algoritic module, can carry out alarm decision to the CVT voltage data of gathering, setting up the control alarm output module makes things convenient for the monitoring personnel that the abnormal conditions rapid reaction is handled in case report to the police in the on-the-spot output alarm information of device, store central processor CPU in the memory module and be used for alarm parameters information and the other system application parameter information that the CVT voltage alarm is judged, each road voltage is input to central processor CPU after by A/D change-over circuit module converts, central processing unit is according to its built-in alarm algorithm module and the information such as alarm parameters that are stored in the memory module, voltage data is carried out alarm decision, after warning is set up, warning message is through alarm output module and human-computer interface module output, and being stored in memory module, the information of voltage that the telecommunication module collects terminal is real-time transmitted to long-range main website with the warning message that monitors and carries out monitoring, alarming.
More than, be system's primary structure of three-phase CVT on-line monitoring terminal.And because the needs of single-phase CVT alarm decision input, single-phase CVT on-line monitoring terminal has also increased a switching input module and has been used to judge whether this CVT is operated in certain bar bus except that comprising the above module identical with three-phase CVT on-line monitoring terminal.
The beneficial effects of the utility model are:
1, the CVT voltage data to gathering from A/D change-over circuit module, alarm algorithm module and the alarm parameters in the memory module in conjunction with central processing unit carry out the alarm analysis judgement, if alert if is set up then instant at the scene output alarm information, make things convenient for instant the handling unusually CVT fast of staff.
2, by liquid crystal display, Chinesizing menu and button can carry out flexible configuration to terminal system parameter, alarm parameters easily.Secondly, consider other special wiring modes that single-phase CVT scene may occur, single-phase CVT can also be configured by butted line mode in being provided with in parameter, thereby adjusts the input voltage range of this mode of connection of alarm algorithm module adaptive.In addition, also comprise the function that magnitude of voltage is demarcated in parameter is provided with, can improve the voltage acquisition precision.
Description of drawings
Fig. 1 is the utility model three-phase CVT on-line monitoring terminal system structured flowchart.
Fig. 2 is the single-phase CVT on-line monitoring of a utility model terminal system structured flowchart.
Fig. 3 is the workflow diagram of the utility model CVT alarm algorithm module.
Embodiment
Below, in conjunction with the accompanying drawings and embodiments the utility model is further specified.
The CVT on-line monitoring terminal system of present embodiment comprises:
Central processor CPU 1: be used to carry out data operation, control each module work etc.; By built-in alarm algorithm module, can carry out alarm decision to the CVT voltage data of gathering;
A/D change-over circuit module 2: measure the alternating voltage input signal, carry out the high precision analogue conversion, and transformation result is sent to described central processor CPU;
Memory module 3: be used for stores system parameters such as parameter is provided with password etc., alarm parameters such as 3U0 value, the out-of-limit value of voltage etc., and nearest 20 the historical warning messages in back that power on comprise warning title, time, warning each road magnitude of voltage etc. constantly;
Human-computer interface module 4: adopt and touch button and extensive dot matrix demonstration liquid crystal display, have Chinese display interface, terminal panel has run indicator and alarm lamp simultaneously;
Alarm output module 5: comprise relay, alarm lamp etc.When terminal monitors alarm generation, the alarm relay closure, the panel alarm lamp on the terminal is lighted simultaneously.When the current All Alerts of terminal was all removed, relay disconnected, and alarm lamp extinguishes.But alarm relay is sound-producing device such as tapper also, is used for output alarm sound.
Telecommunication module 6: be used for warning message with the information of voltage of terminal collection and judgement and be transferred to long-range main website and carry out monitoring, alarming.
Power module 7: be used for the feed system working power.
It more than is system's primary structure of three-phase CVT on-line monitoring terminal, because the needs of single-phase CVT alarm decision input, single-phase CVT on-line monitoring terminal is except that comprising the above module identical with three-phase CVT on-line monitoring terminal, also comprise a switching input module 8, this switching input module links to each other with central processor CPU, be used for one of single-phase CVT warning input criterion, as shown in Figure 2.Wherein, A/D change-over circuit module, memory module, human-computer interface module, alarm output module, telecommunication module and switching input module link to each other with central processor CPU respectively, and be controlled by central processor CPU, power module provides working power for system.
In the present embodiment; central processor CPU is selected the ARM7 chip of RISC nuclear at a high speed; the A/D sample circuit of control A/D change-over circuit module ripple weekly carries out the calculating of 64 point samplings; be equipped with maturation, the AC sampling of simplifying and protect algorithm, what the accuracy of assurance DATA REASONING and protection were judged is accurate, quick, reliable.Simultaneously, central processor CPU is with the information of voltage that collects, by built-in accurate strict CVT alarm algorithm module it is monitored judgement,, control alarm output module at once and send warning message prompting staff handling unusually in case alert if is set up.In addition, also built-in voltage demarcating module in the central processor CPU, the principle of work that voltage is demarcated is: the voltage acquisition port that at first standard voltage value is input to device, import the current standard value of importing voltage into then in the voltage calibration interface in man-machine interface, then the magnitude of voltage that collects according to A/D sample circuit module of voltage demarcating module and the standard value of input combine, according to the voltage calibration algorithm magnitude of voltage is demarcated, to improve voltage accuracy.
The system works flow process of present embodiment is as follows:
Connect (wherein single-phase CVT also want multiple access one way switch amount input terminal as one of warning criterion) such as power supply, each road voltage input end on request.
After terminal powered on, the user can select to enter different menu screens and check systemic-function on liquid crystal display.Be used to export each road real-time voltage data as the automatic function picture; Picture is set is used to be provided with systematic parameter, alarm parameters index and demarcate each road magnitude of voltage; Historical warning picture is used to check historical warning message.
After system starts working, be input in the central processor CPU after the A/D sample circuit conversion of each road voltage by A/D change-over circuit module, again measurement result outputed on the LCDs of human-computer interface module and show in real time; Simultaneously, central processing unit is according to built-in CVT alarm algorithm module, with alarm parameters in the memory module etc. voltage data (the warning input criterion of single-phase CVT on-line monitoring terminal also comprises the information of switching input module) is carried out alarm decision, set up in case report to the police, display alarm information picture, the relay in the alarm output module and alarm lamp output alarm information at once on the liquid crystal display.Central processing unit is saved in this warning message in the memory module simultaneously.Memory module is rolled and is refreshed, and keeps up-to-date 20 the historical warning messages in back that power on.The user can be by entering the historical warning message of leafing through in the historical warning picture by the key control liquid crystal display in the human-computer interface module.After system monitoring was removed to the alert if of CVT voltage, the warning output in the alarm output module was with corresponding releasing.In addition, system acquisition to voltage data and the warning message that monitors all be real-time transmitted to long-range main website by the telecommunication module, conveniently carry out remote monitoring.
The principle of work of the CVT alarm algorithm module of present embodiment.Be judged as example with the Threshold Crossing Alert of three-phase CVT device A phase voltage, Fig. 3 is the algorithm flow chart of this phase alarm decision, and its principle is: (this partial content)
After device powers on and moves, the every alarm decision parameter value of initialization, the establishment sign that is about to report to the police, a warning second counter, the recovery second counter O reset of reporting to the police).
The Rule of judgment of in accordance with regulations this warning, the magnitude of voltage of the collection that reads from CPU is judged:
If alert if is set up, second counter of then reporting to the police adds one, behind the alarm delay time that reaches regulation, and this establishment of reporting to the police, device sends every warning message, comprises the display alarm picture, the alarm relay closure, alarm lamp is lighted etc.To report to the police a simultaneously second counter O reset deposits this warning message in the alarm history data storage area in.
If alert if is false, then will report to the police a second counter O reset, judge whether there has been this warning before simultaneously, if before existing this warning, the recovery second counter of then reporting to the police adds one, when this counter reaches 3 seconds, just voltage condition returned in the normal range more than 3 seconds, showed this alarm release, and (alarm relay disconnects the every warning message that sends before system cancels, alarm lamp extinguishes etc.), will report to the police simultaneously and recover counter O reset.
Notice that this alarm algorithm flow process is undertaken by once circulating p.s..The algorithm flow and the example of other warning classifications are similar, and just alarm decision condition difference does not repeat them here.
U among Fig. 3
SET1, the high limit of voltage coefficient, voltage lower bound coefficient, voltage high limit, the low limit value of voltage, alarm delay time t
4Be the CVT alarm parameters, can in the CVT device, be provided with and preserve.
Claims (4)
1, a kind of CVT on-line monitoring terminal is characterized in that comprising:
Central processor CPU and the A/D change-over circuit module, memory module, human-computer interface module, alarm output module, telecommunication module and the power module that are attached thereto; Wherein,
Central processor CPU is controlled each module work, and it is built-in with the alarm algorithm module, can carry out alarm decision to the CVT voltage data of gathering;
A/D change-over circuit module is used to measure the alternating voltage input signal, carries out after the analog to digital conversion transformation result being sent to described central processor CPU;
Memory module is used for stores system parameters, alarm parameters and warning message etc.;
Alarm output module and human-computer interface module are used in the on-the-spot output alarm information of device;
The telecommunication module is used for the information of voltage that terminal is collected and the warning message that monitors and is real-time transmitted to long-range main website and carries out monitoring, alarming.
2, CVT on-line monitoring terminal as claimed in claim 1 is characterized in that, also is provided with a switching input module that links to each other with central processor CPU, is used to judge whether CVT is operated in certain bar bus.
3, CVT on-line monitoring terminal as claimed in claim 1 or 2 is characterized in that, central processor CPU is the ARM7 chip of RISC nuclear.
4, CVT on-line monitoring terminal as claimed in claim 1 or 2 is characterized in that, a built-in voltage demarcating module is used for magnitude of voltage is demarcated in the central processor CPU, to improve the voltage acquisition precision.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201912096U CN201138365Y (en) | 2007-11-15 | 2007-11-15 | CVT on-line monitoring terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201912096U CN201138365Y (en) | 2007-11-15 | 2007-11-15 | CVT on-line monitoring terminal |
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| Publication Number | Publication Date |
|---|---|
| CN201138365Y true CN201138365Y (en) | 2008-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2007201912096U Expired - Lifetime CN201138365Y (en) | 2007-11-15 | 2007-11-15 | CVT on-line monitoring terminal |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102129763A (en) * | 2011-01-10 | 2011-07-20 | 北京交通大学 | CVT (Capacitor Voltage Transformer) online monitoring system |
| CN102855725A (en) * | 2012-09-19 | 2013-01-02 | 深圳力合数字电视信息技术有限公司 | Device, system and method for livestock anti-burglary radio frequency identification and monitoring |
| CN102879630A (en) * | 2012-09-17 | 2013-01-16 | 浙江省电力公司电力科学研究院 | Capacitive voltage transformer failure monitoring instrument |
| CN109581270A (en) * | 2019-01-14 | 2019-04-05 | 四川大学 | Method based on multi-scale wavelet transform Fast Identification CVT failure |
| CN112485556A (en) * | 2020-11-03 | 2021-03-12 | 国电南瑞南京控制系统有限公司 | CVT fault detection method and system based on transformer substation monitoring system and storage medium |
-
2007
- 2007-11-15 CN CNU2007201912096U patent/CN201138365Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102129763A (en) * | 2011-01-10 | 2011-07-20 | 北京交通大学 | CVT (Capacitor Voltage Transformer) online monitoring system |
| CN102879630A (en) * | 2012-09-17 | 2013-01-16 | 浙江省电力公司电力科学研究院 | Capacitive voltage transformer failure monitoring instrument |
| CN102855725A (en) * | 2012-09-19 | 2013-01-02 | 深圳力合数字电视信息技术有限公司 | Device, system and method for livestock anti-burglary radio frequency identification and monitoring |
| CN109581270A (en) * | 2019-01-14 | 2019-04-05 | 四川大学 | Method based on multi-scale wavelet transform Fast Identification CVT failure |
| CN112485556A (en) * | 2020-11-03 | 2021-03-12 | 国电南瑞南京控制系统有限公司 | CVT fault detection method and system based on transformer substation monitoring system and storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20081022 |