CN204241588U - Current transformer operating state monitoring system - Google Patents
Current transformer operating state monitoring system Download PDFInfo
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- CN204241588U CN204241588U CN201420680250.XU CN201420680250U CN204241588U CN 204241588 U CN204241588 U CN 204241588U CN 201420680250 U CN201420680250 U CN 201420680250U CN 204241588 U CN204241588 U CN 204241588U
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Abstract
A kind of current transformer operating state monitoring system that the utility model provides, comprises for the monitoring means of monitoring current mutual inductor operational factor, the processing unit be connected with described monitoring means output terminal, the output unit be connected with described processing unit and the dispatching center be connected with described processing unit, described monitoring means at least comprises two temperature sensors, be arranged at the vibration transducer of current transformer, the voltage detection module of the current detection module being connected to the secondary side of current transformer and the secondary side being connected to current transformer, wherein a temperature sensor is arranged at current transformer, another temperature sensor to be arranged among the environment residing for current transformer and to have the distance of setting with current transformer, comprehensively can carry out Real-Time Monitoring to the running status of current transformer all sidedly, and whether the fault that accurately can judge current transformer is that secondary side open circuit causes or other reasons causes, ensure that electric system runs sustainedly and stably.
Description
Technical field
The utility model relates to the monitoring system of power equipment, particularly relates to a kind of current transformer operating state monitoring system.
Background technology
Current transformer is one of equipment commonly used in electric power supply, plays vital effect in power supply process, and its main application is mainly used for protection and measures.Current transformer in use makes to forbid secondary side to be opened a way, there is following harm in secondary side open circuit: the secondary side open circuit of current transformer, so the electric current of the primary side of current transformer is all for excitation, make the iron core of current transformer seriously saturated, the magnetic flux of alternation induces high voltage on the coil of secondary side, its peak value can up to several kilovolts volt even up to ten thousand, therefore serious harm will be brought, such as: contact accident, current transformer burns out, differential protection or zero-sequence current protection are because of out-of-balance current malfunction etc., therefore, need to monitor the secondary side open circuit of current transformer, grasp the working condition of current transformer at any time.
But, although there is the device of monitoring current transformer in prior art, such as monitor secondary side current or secondary survey voltage, or survey whether there are electric discharge phenomena by the secondary observing current transformer, or observe the temperature of current transformer and whether have the generation etc. of peculiar smell, but above-mentioned each mode accurately can not determine whether that the secondary of current transformer measures existing open circuit, as secondary surveys misjudgment, then chain reaction can be caused, the malfunction such as protected, the secondary side open fault of current transformer is even eliminated by the process that has a power failure, thus cause power failure, cause powered operation unstable, and in the operation of current transformer, need to carry out accurate assurance to the integrality of current transformer, guarantee is powered continually and steadily.
Therefore, need to propose a kind of system of monitoring the running status of current transformer, comprehensively can carry out Real-Time Monitoring to the running status of current transformer all sidedly, and whether the fault that accurately can judge current transformer is secondary side open circuit, the potential safety hazard avoiding the fault due to current transformer to bring and accident of power supply, ensure that electric system runs sustainedly and stably.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of current transformer operating state monitoring system, comprehensively can carry out Real-Time Monitoring to the running status of current transformer all sidedly, and whether the fault that accurately can judge current transformer is secondary side open circuit, the potential safety hazard avoiding the fault due to current transformer to bring and accident of power supply, ensure that electric system runs sustainedly and stably.
A kind of current transformer operating state monitoring system that the utility model provides, comprises for the monitoring means of monitoring current mutual inductor operational factor, the processing unit be connected with described monitoring means output terminal, the output unit be connected with described processing unit and the dispatching center be connected with described processing unit;
Described monitoring means at least comprises two groups of temperature sensors, be arranged at the vibration transducer of current transformer, be connected to the current detection module of the secondary side of current transformer and be connected to the voltage detection module of secondary side of current transformer, wherein one group of temperature sensor is arranged at current transformer, has the distance of setting among the environment that another group temperature sensor is arranged at residing for current transformer with current transformer.
Further, described processing unit comprises the preposing signal process circuit that input end is connected with described monitoring means output terminal and the central processing circuit be connected with the output terminal of described preposing signal process circuit, and described central processing circuit is connected with dispatching center.
Further, described processing unit also comprises coding circuit, and described coding circuit is connected with central processing circuit.
Further, described preposing signal process circuit comprises amplifying circuit, the filtering circuit that input end is connected with described amplification circuit output end, the analog to digital conversion circuit be connected with the output terminal of described filtering circuit, the preposition micro-processor interface circuit that input end is connected with the output terminal of described signal acquisition circuit with output terminal connection signal Acquisition Circuit and the input end of analog-digital conversion circuit as described, the output terminal of described preposition micro-processor interface circuit is connected with described CPU (central processing unit), the input end of described amplifying circuit and described temperature sensor, vibration transducer, the output terminal of current detection module and voltage detection module connects.
Further, the described output unit display that comprises the output interface be connected with central processing circuit, the alarm be connected with described central processing circuit and be connected with described central processing circuit.
Further, described monitoring system also comprises image acquisition units, the image processing circuit that described image acquisition units comprises the camera for gathering current transformer external image and is connected with the output terminal of described camera, the output terminal of described image processing circuit is connected with described central processing circuit.
Further, described processing unit and dispatching center wirelessly carry out being connected and carrying out data interaction.
Further, the central processing circuit of described processing unit is connected with dispatching center by wireless transport module, and wherein wireless transport module adopts ethernet module or mobile data transfer module.
The beneficial effects of the utility model: current transformer operating state monitoring system of the present utility model, comprehensively can carry out Real-Time Monitoring to the running status of current transformer all sidedly, and whether the fault that accurately can judge current transformer is that secondary side open circuit causes or other reasons causes, the potential safety hazard avoiding the fault due to current transformer to bring and accident of power supply, ensure that electric system runs sustainedly and stably.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further described:
Fig. 1 is theory diagram of the present utility model.
Embodiment
Fig. 1 is theory diagram of the present utility model, as shown in the figure, originally comprise for the monitoring means of monitoring current mutual inductor operational factor, the processing unit be connected with described monitoring means output terminal, the output unit be connected with described processing unit and the dispatching center be connected with described processing unit;
Described monitoring means at least comprises two groups of temperature sensors, be arranged at the vibration transducer of current transformer, the voltage detection module of the current detection module being connected to the secondary side of current transformer and the secondary side being connected to current transformer, wherein one group of temperature sensor is arranged at current transformer, with current transformer, there is the distance of setting among the environment that another group temperature sensor is arranged at residing for current transformer, this setpoint distance can be arranged according to actual conditions, and generating heat to prevent current transformer itself impacts as setting principle to the temperature sensor monitors result be arranged in environment residing for current transformer, certainly, often organize temperature sensor and at least comprise a temperature sensor, often organize temperature sensor and also can arrange three by foundation actual needs, four even more, select according to actual needs, in Fig. 1, the one group of temperature sensor temperature sensor A being arranged at current transformer represents, the one group of temperature sensor temperature sensor B be arranged among the environment residing for current transformer represents, current transformer operating state monitoring system of the present utility model, comprehensively can carry out Real-Time Monitoring to the running status of current transformer all sidedly, and whether the fault that accurately can judge current transformer is that secondary side open circuit causes or other reasons causes, the potential safety hazard avoiding the fault due to current transformer to bring and accident of power supply, ensure that electric system runs sustainedly and stably, wherein current detection module and voltage detection module all adopt existing circuit realiration, voltage detection module also should arrange overvoltage crowbar, prevent voltage detection module from damaging.
In the present embodiment, described processing unit comprises the preposing signal process circuit that input end is connected with described monitoring means output terminal and the central processing circuit be connected with the output terminal of described preposing signal process circuit, described central processing circuit is connected with dispatching center, wherein, central processing circuit adopts existing single-chip microcomputer, such as AVR single chip, 89C51 single-chip microcomputer etc., all the purpose of this utility model can be realized by carrying existing program, certainly, central processing circuit also can adopt existing integrated chip.
In the present embodiment, described processing unit also comprises coding circuit, described coding circuit is connected with central processing circuit, due to current transformer in actual use and more than one, a transformer station or transformation center all have multiple current transformer, by the effect of coding circuit, after the data monitored when native system are transferred to central processing circuit, dispatching center is sent to after being modulated by the coding that Monitoring Data and coding circuit export by central processing circuit, be convenient to accurately judge the position of concrete current transformer, and make the most rational rescue plan in time with guiding work staff.
In the present embodiment, described preposing signal process circuit comprises amplifying circuit, the filtering circuit that input end is connected with described amplification circuit output end, the analog to digital conversion circuit be connected with the output terminal of described filtering circuit, the preposition micro-processor interface circuit that input end is connected with the output terminal of described signal acquisition circuit with output terminal connection signal Acquisition Circuit and the input end of analog-digital conversion circuit as described, the output terminal of described preposition micro-processor interface circuit is connected with described CPU (central processing unit), the input end of described amplifying circuit and described temperature sensor, vibration transducer, the output terminal of current detection module and voltage detection module connects,
Wherein, amplifying circuit, filtering circuit, signal acquisition circuit and analog to digital conversion circuit all preferentially adopt existing multi-channel circuit, also can arrange accordingly according to each checkout equipment one_to_one corresponding of actual monitoring unit, amplifying circuit, filtering circuit, signal acquisition circuit and analog to digital conversion circuit;
Preposition micro-processor interface circuit adopts existing single-chip microcomputer, such as AVR single chip, and AT89S51 single-chip microcomputer or ARM single-chip microcomputer, also can adopt existing integrated circuit.
In the present embodiment, described output unit comprises the output interface be connected with central processing circuit, the alarm be connected with described central processing circuit and the display be connected with described central processing circuit, by the effect of output unit, the staff of Shi Ge transformer station can grasp the working condition of current transformer in time, and after receiving warning message, make preparation of fixing a breakdown immediately, for the fault being easy to get rid of, such as connection terminal loosens, laying dust is serious etc. can perform fault immediately and discharge, but need power failure operation etc. when secondary side is opened a way, then needing after the instruction of dispatching center could action, output interface can be that central processing circuit is connected with external equipment, such as storer, computer or other equipment.
In the present embodiment, described monitoring system also comprises image acquisition units, the image processing circuit that described image acquisition units comprises the camera for gathering current transformer external image and is connected with the output terminal of described camera, the output terminal of described image processing circuit is connected with described central processing circuit, wherein, camera more than one, can arrange multiple, selected by staff according to the position of monitoring and visual angle, image processing circuit adopts existing single-chip microcomputer to carry existing program and processes.
In the present embodiment, described processing unit and dispatching center wirelessly carry out being connected and carrying out data interaction, the central processing circuit of described processing unit is connected with dispatching center by wireless transport module, wherein wireless transport module adopts ethernet module or mobile data transfer module, by the mode of wireless transmission, complicated connection can be avoided, and reduce costs, and the real-time of data can be ensured, mobile data transfer module is as 3G module or 4G module etc.
Principle of work of the present utility model:
When current transformer runs, the correlation parameter by each monitoring of equipment current transformer of monitoring means:
If the vibration signal of vibration transducer output is to preposition micro-processor interface circuit, occur abnormal as vibrated, such as vibration and wave motion is larger, then preposition micro-processor interface circuit exports abnormal vibration signal to central processing circuit, and preposition micro-processor interface circuit judges that whether temperature sensor output signal is abnormal, and judge whether current detection circuit and voltage detecting circuit exist exception, and above-mentioned each testing result is all transferred to central processing circuit, the abnormal signal exported as only having vibration transducer, all the other are all normal, then illustrate that vibration comes from the external world, the vibration such as produced when doing other overhauls of the equipments, central processing circuit does not make report instruction, but central processing circuit output alarm information by the detection signal synchronous transmission of preposition micro-processor interface circuit to dispatching center,
The temperature signal that temperature sensor as being arranged at current transformer exports is abnormal, and other signals are normal, then preposition micro-processor interface circuit obtains the image information that image acquisition units exports, and by above-mentioned each synchronizing information in central processing circuit, check that whether the connection terminal of current transformer is loosening or laying dust is serious by staff, in this way, then take to know measure, central processing circuit and report instruction but output alarm information, and Simultaneous Monitoring information is to dispatching center, temperature as all temperature sensors occurs abnormal, and judged whether that extraneous factor causes exception by image information, such as winter, the temperature lower (equal with environment temperature) that the temperature sensor being arranged at environment exports, and the temperature that the temperature sensor being arranged at current sensor exports is higher, then illustrate that icing fault or current transformer overload etc. appear in connection terminal or other connecting portions of current transformer, staff performs fault cleaning immediately, and the connection terminal of all right monitoring current mutual inductor of image acquisition units whether often Discharge Phenomena, as by occurring that spark judges, staff is reminded to note the insulating protection of current transformer with this, avoid causing current mulual inductor malfunction because of insulation ag(e)ing, and get rid of the inducement of electric discharge phenomena generation in time.
The temperature information that temperature sensor as being arranged at current transformer exports is abnormal, the vibration of shock sensor occurs abnormal, and current detection circuit no current exports and the voltage jump of voltage detecting circuit, then all information is sent to central processing circuit by preposition micro-processor interface circuit immediately, and the instruction of opening a way Current Transformer Secondary side is made by central processing circuit, report to the police immediately, and make report instruction, emergent instruction is made at request scheduling center immediately, and synchronously all image informations of image acquisition units are transferred to dispatching center, observe and whether occur the situation of smoldering, and central processing circuit is exported different warning messages according to the instruction that dispatching center feeds back and is shown by display, as central processing circuit does not receive the feedback command of dispatching center in setting-up time, then export and perform instruction immediately, emergency processing is made by the staff of transformer station, such as have a power failure process.
No-output as equal in vibration transducer, current detection module and voltage detection module, and the temperature sensor being arranged at current transformer exports on the low side, then prove that the primary side of current transformer breaks down, central processing circuit output alarm information, and by synchronizing information to dispatching center.
Above principle of work is only illustrated comparatively typical fault, failure alarm signal can be set according to actual needs, that is the various combination of each signal that monitoring means exports is received by central processing circuit, and report to the police according to the unusual condition of signal, all can reach and effective monitoring is in real time carried out to the running status of current transformer, do not illustrated one by one at this.
What finally illustrate is, above embodiment is only in order to illustrate the technical solution of the utility model and unrestricted, although be described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify to the technical solution of the utility model or equivalent replacement, and not departing from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of right of the present utility model.
Claims (8)
1. a current transformer operating state monitoring system, is characterized in that: comprise for the monitoring means of monitoring current mutual inductor operational factor, the processing unit be connected with described monitoring means output terminal, the output unit be connected with described processing unit and the dispatching center be connected with described processing unit;
Described monitoring means at least comprises two groups of temperature sensors, be arranged at the vibration transducer of current transformer, be connected to the current detection module of the secondary side of current transformer and be connected to the voltage detection module of secondary side of current transformer, wherein one group of temperature sensor is arranged at current transformer, has the distance of setting among the environment that another group temperature sensor is arranged at residing for current transformer with current transformer.
2. current transformer operating state monitoring system according to claim 1, it is characterized in that: described processing unit comprises the preposing signal process circuit that input end is connected with described monitoring means output terminal and the central processing circuit be connected with the output terminal of described preposing signal process circuit, and described central processing circuit is connected with dispatching center.
3. current transformer operating state monitoring system according to claim 2, it is characterized in that: described processing unit also comprises coding circuit, described coding circuit is connected with central processing circuit.
4. current transformer operating state monitoring system according to claim 3, it is characterized in that: described preposing signal process circuit comprises amplifying circuit, the filtering circuit that input end is connected with described amplification circuit output end, the analog to digital conversion circuit be connected with the output terminal of described filtering circuit, the preposition micro-processor interface circuit that input end is connected with the output terminal of described signal acquisition circuit with output terminal connection signal Acquisition Circuit and the input end of analog-digital conversion circuit as described, the output terminal of described preposition micro-processor interface circuit is connected with described CPU (central processing unit), the input end of described amplifying circuit and described temperature sensor, vibration transducer, the output terminal of current detection module and voltage detection module connects.
5. current transformer operating state monitoring system according to claim 2, is characterized in that: the display that described output unit comprises the output interface be connected with central processing circuit, the alarm be connected with described central processing circuit and is connected with described central processing circuit.
6. current transformer operating state monitoring system according to the arbitrary claim of claim 2-5, it is characterized in that: described monitoring system also comprises image acquisition units, the image processing circuit that described image acquisition units comprises the camera for gathering current transformer external image and is connected with the output terminal of described camera, the output terminal of described image processing circuit is connected with described central processing circuit.
7. current transformer operating state monitoring system according to claim 6, is characterized in that: described processing unit and dispatching center wirelessly carry out being connected and carrying out data interaction.
8. current transformer operating state monitoring system according to claim 7, it is characterized in that: the central processing circuit of described processing unit is connected with dispatching center by wireless transport module, wherein wireless transport module adopts ethernet module or mobile data transfer module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420680250.XU CN204241588U (en) | 2014-11-11 | 2014-11-11 | Current transformer operating state monitoring system |
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| CN201420680250.XU CN204241588U (en) | 2014-11-11 | 2014-11-11 | Current transformer operating state monitoring system |
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| CN204241588U true CN204241588U (en) | 2015-04-01 |
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| CN201420680250.XU Expired - Fee Related CN204241588U (en) | 2014-11-11 | 2014-11-11 | Current transformer operating state monitoring system |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105487037A (en) * | 2016-01-13 | 2016-04-13 | 济南大学 | Electric parameter-based transformer fault diagnosis method |
| CN105487038A (en) * | 2016-01-13 | 2016-04-13 | 济南大学 | Traditional transformer state monitoring system and method |
| CN105510862A (en) * | 2016-01-13 | 2016-04-20 | 济南大学 | Voltage transformer state monitoring system and method |
| CN105527600A (en) * | 2016-01-13 | 2016-04-27 | 济南大学 | Current transformer state monitoring system and method |
| CN105675044A (en) * | 2016-01-13 | 2016-06-15 | 济南大学 | Temperature-based transformer fault diagnosis method |
| CN105701543A (en) * | 2016-01-13 | 2016-06-22 | 济南大学 | Traditional transformer state monitoring method based on probabilistic neural network |
| CN106026038A (en) * | 2016-05-19 | 2016-10-12 | 天津送变电工程公司 | Vibration-preventing control device of electronic transformer |
| CN106841743A (en) * | 2016-11-28 | 2017-06-13 | 国网河南省电力公司中牟县供电公司 | Transformer secondary side detects control method and device |
| CN107037303A (en) * | 2016-11-07 | 2017-08-11 | 北京博纳电气股份有限公司 | Detection means and detection method for tested CT secondary side circuit states outside ammeter |
| CN108508395A (en) * | 2017-02-26 | 2018-09-07 | 武汉市欧睿科技有限公司 | A kind of electronic transformer test system |
| CN109709419A (en) * | 2018-12-26 | 2019-05-03 | 国网上海市电力公司 | A kind of Substation secondary circuit state on_line monitoring device |
| CN109725215A (en) * | 2018-12-18 | 2019-05-07 | 国家电网公司 | Substation capacitors group Working Status Monitoring early warning system |
| RU203907U1 (en) * | 2020-10-26 | 2021-04-27 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Омский государственный университет путей сообщения" | POWER TRANSFORMER TECHNICAL CONDITION ASSESSMENT DEVICE |
| CN115097192A (en) * | 2022-08-24 | 2022-09-23 | 西安兴汇电力科技有限公司 | Encryption type integrated electronic transformer |
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2014
- 2014-11-11 CN CN201420680250.XU patent/CN204241588U/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105701543B (en) * | 2016-01-13 | 2018-03-02 | 济南大学 | A kind of traditional transformer state monitoring method based on probabilistic neural network |
| CN105487038A (en) * | 2016-01-13 | 2016-04-13 | 济南大学 | Traditional transformer state monitoring system and method |
| CN105510862A (en) * | 2016-01-13 | 2016-04-20 | 济南大学 | Voltage transformer state monitoring system and method |
| CN105527600A (en) * | 2016-01-13 | 2016-04-27 | 济南大学 | Current transformer state monitoring system and method |
| CN105675044A (en) * | 2016-01-13 | 2016-06-15 | 济南大学 | Temperature-based transformer fault diagnosis method |
| CN105701543A (en) * | 2016-01-13 | 2016-06-22 | 济南大学 | Traditional transformer state monitoring method based on probabilistic neural network |
| CN105527600B (en) * | 2016-01-13 | 2018-07-13 | 济南大学 | A kind of current transformer condition monitoring system and method |
| CN105487037A (en) * | 2016-01-13 | 2016-04-13 | 济南大学 | Electric parameter-based transformer fault diagnosis method |
| CN106026038A (en) * | 2016-05-19 | 2016-10-12 | 天津送变电工程公司 | Vibration-preventing control device of electronic transformer |
| CN107037303A (en) * | 2016-11-07 | 2017-08-11 | 北京博纳电气股份有限公司 | Detection means and detection method for tested CT secondary side circuit states outside ammeter |
| CN107037303B (en) * | 2016-11-07 | 2019-06-07 | 北京博纳电气股份有限公司 | For being tested the detection device and method of CT secondary side circuit state outside ammeter |
| CN106841743A (en) * | 2016-11-28 | 2017-06-13 | 国网河南省电力公司中牟县供电公司 | Transformer secondary side detects control method and device |
| CN108508395A (en) * | 2017-02-26 | 2018-09-07 | 武汉市欧睿科技有限公司 | A kind of electronic transformer test system |
| CN109725215A (en) * | 2018-12-18 | 2019-05-07 | 国家电网公司 | Substation capacitors group Working Status Monitoring early warning system |
| CN109709419A (en) * | 2018-12-26 | 2019-05-03 | 国网上海市电力公司 | A kind of Substation secondary circuit state on_line monitoring device |
| RU203907U1 (en) * | 2020-10-26 | 2021-04-27 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Омский государственный университет путей сообщения" | POWER TRANSFORMER TECHNICAL CONDITION ASSESSMENT DEVICE |
| CN115097192A (en) * | 2022-08-24 | 2022-09-23 | 西安兴汇电力科技有限公司 | Encryption type integrated electronic transformer |
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