CN214225399U - Distribution transformer winding operating temperature on-line monitoring device - Google Patents
Distribution transformer winding operating temperature on-line monitoring device Download PDFInfo
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- CN214225399U CN214225399U CN202022763309.XU CN202022763309U CN214225399U CN 214225399 U CN214225399 U CN 214225399U CN 202022763309 U CN202022763309 U CN 202022763309U CN 214225399 U CN214225399 U CN 214225399U
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- 238000009826 distribution Methods 0.000 title claims abstract description 92
- 238000004804 winding Methods 0.000 title claims abstract description 78
- 238000012806 monitoring device Methods 0.000 title claims abstract description 18
- 238000005259 measurement Methods 0.000 claims abstract description 41
- 238000012545 processing Methods 0.000 claims abstract description 22
- 230000002159 abnormal effect Effects 0.000 claims description 31
- 238000004458 analytical method Methods 0.000 claims description 23
- 238000009413 insulation Methods 0.000 claims description 23
- 230000006866 deterioration Effects 0.000 claims description 11
- 238000004891 communication Methods 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 abstract description 13
- 238000007405 data analysis Methods 0.000 description 4
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- 230000006378 damage Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
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- 239000011810 insulating material Substances 0.000 description 1
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Abstract
The utility model relates to the technical field of on-line monitoring of distribution equipment, in particular to an on-line monitoring device for the running temperature of a distribution transformer winding; the device comprises a first voltage measuring module, a second voltage measuring module, a first current measuring module, a second current measuring module, a data collecting module, a data processing module and a judging and analyzing module, wherein the first voltage measuring module is arranged at the input end of a distribution transformer, the second voltage measuring module is arranged at the outlet end of the distribution transformer, the first current measuring module is arranged at the primary side of the distribution transformer, and the second current measuring module is arranged at the secondary side of the distribution transformer; the data acquisition module is connected with the first voltage measurement module, the second voltage measurement module, the first current measurement module and the second current measurement module; the winding temperature in the actual operation of the distribution transformer is monitored on line in real time, the operation state of the distribution transformer can be monitored on line in real time, and whether the distribution transformer is in a dangerous state or not is judged.
Description
Technical Field
The utility model relates to a distribution equipment on-line monitoring technical field especially relates to distribution transformer winding operating temperature on-line monitoring device.
Background
In recent years, the power industry in China is rapidly developed, and as one of important devices for electric energy transmission, the safety of a transformer has become an important subject. The distribution transformer has wide distribution, large quantity and large energy consumption ratio, and the operation condition of the distribution transformer is very important to the stability of power supply of a power grid. The faults of the distribution transformer caused by abnormal winding temperature are very common, the normal supply of industrial production and user domestic electricity is directly influenced, and the development of national economy is restricted to a great extent.
The hot-spot temperature rise of the transformer winding is an important index for measuring the quality of the transformer winding design. Since the coil winding can be equivalent to a resistor, a certain amount of active power loss is generated on the coil winding. These losses are converted into heat energy, which, in the event of a failure of the distribution transformer, can lead to a destruction of the insulation capacity of the equipment due to its overheating, and ultimately to a damage of the equipment. The most important factor affecting the insulation capability is the winding temperature during operation of the transformer. If the temperature of the winding of the transformer during operation is too low, the load capacity of the transformer cannot be fully utilized, and the economic benefit is reduced; and the high temperature not only can cause the winding or the switch contact to generate heat and the insulating material to age, but also can burn the connecting conductor and the related equipment under severe conditions, so that fire accidents occur and the power supply is interrupted.
The existing power monitoring equipment is not enough to realize on-line monitoring on the distribution transformer, and an on-line monitoring method is urgently needed to meet the requirement of on-line real-time monitoring on the running temperature of the distribution transformer winding so as to find the insulation fault in time, enable the insulation fault to quit running and avoid further expansion of accidents.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a distribution transformer winding operating temperature on-line monitoring device can online accurate measurement distribution transformer winding operating temperature, judges distribution transformer operating condition and has or not unusual to can judge whether its insulation worsens through the trend of change of winding temperature rise.
In order to solve the technical problem, the utility model provides a following technical scheme:
the distribution transformer winding operation temperature on-line monitoring device comprises a first voltage measuring module, a second voltage measuring module, a first current measuring module, a second current measuring module, a data acquisition module, a data processing module and a judgment and analysis module,
the first voltage measuring module is arranged at the input end of the distribution transformer, the second voltage measuring module is arranged at the outlet end of the distribution transformer, the first current measuring module is arranged at the primary side of the distribution transformer, and the second current measuring module is arranged at the secondary side of the distribution transformer;
the data acquisition module is connected with the first voltage measurement module, the second voltage measurement module, the first current measurement module and the second current measurement module, comprises a timer and a memory and is used for acquiring a first time t1And a second time t2Measurement data of the first voltage measurement module, the second voltage measurement module, the first current measurement module and the second current measurement module;
the data processing module is connected with the data acquisition module and used for calculating and tracking the temperature rise of the winding;
the judgment and analysis module is connected with the data processing module, comprises a trend analysis unit and a logic analysis unit and is used for analyzing whether the temperature rise of the winding is in four states of data abnormity, serious abnormity, light abnormity and insulation state deterioration.
Preferably, the monitoring device further comprises a display and alarm module connected with the output end of the judgment and analysis module, and if the winding temperature rise is not in an abnormal state, the display and alarm module displays the temperature rise of the winding of the distribution transformer through a display unit; if the temperature rise of the winding is in a data abnormal state, a serious abnormal state and a slight abnormal state, the display and alarm module starts data abnormal prompt through the alarm unit; and if the winding temperature rise is in an insulation deterioration state, the display and alarm module sends a tripping instruction through the tripping unit.
Preferably, the data processing module comprises an operating voltage calculating unit, an equivalent resistance calculating unit and a winding temperature rise calculating unit which are connected in sequence.
Preferably, the first voltage measurement module and the second voltage measurement module adopt voltage transformers, and the first current measurement module and the second current measurement module adopt current transformers.
Preferably, the data processing module adopts a single chip microcomputer controller or a DSP data processor.
Preferably, the data processing module and the judgment analysis module are connected through a wireless communication module.
Compared with the prior art, the technical scheme has the following advantages:
1. the utility model discloses can real-time on-line monitoring distribution transformer actual operation in the winding temperature to can real-time on-line monitoring distribution transformer's running state, judge whether distribution transformer is in dangerous state, measurement technique measuring result is more accurate, simultaneously can be according to the trend of change of its winding temperature rise, discover the potential insulation defect that distribution transformer operation produced, guarantee distribution transformer safety and stability's operation, reduce the risk of the electric wire netting accident that arouses because distribution transformer trouble.
2. By correctly setting the rated parameters of the normal operation of the distribution transformer, whether the operation state of the distribution transformer is normal or not and whether the insulation has a deterioration risk or not are judged according to the variation trend of the temperature rise of the winding of the distribution transformer. If the current of the distribution transformer is increased, the temperature rise of the winding exceeds the hottest point temperature, and the heating is serious, the insulation of the distribution transformer is deteriorated, and the distribution transformer is required to be tripped immediately at the moment so as to quit the running state.
3. Because the on-line monitoring system for the running temperature of the distribution transformer winding is realized in the real-time running of the transformer, the data such as voltage, current, winding temperature rise and the like consumed by a transformer loop can be monitored and analyzed in real time, and the defects of equipment can be timely and effectively discovered.
4. The trend analysis module is used for accurately carrying out trend analysis on the measured data, accurately evaluating the running state of the transformer loop, and timely forecasting and finding potential defects of the transformer loop.
5. Through setting up wireless communication module, accurate upload the calculated result to the backstage, for trend analysis module and logic analysis module provide the criterion support, make things convenient for operation and maintenance personnel to hold transformer circuit operation information in real time accurately.
6. Through the display and alarm module, the operation parameters of the transformer loop are accurately displayed, and the fault of the transformer loop is timely alarmed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is the utility model provides a distribution transformer winding operating temperature on-line monitoring device's circuit diagram.
In the figure: 1. a first voltage measurement module; 2. a second voltage measurement module; 3. a first current measurement module; 4. a second current measurement module; 5. a data acquisition module; 6. a data processing module; 7. a judgment analysis module; 8. a display and alarm module; 9. and a wireless communication module.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, specific details are set forth in order to provide a thorough understanding of the present invention. The invention can be implemented in a number of other ways than those described herein, and those skilled in the art will be able to make similar generalizations without departing from the spirit of the invention. The invention is therefore not limited to the specific embodiments disclosed below.
As shown in FIG. 1, a specific embodiment of the present invention provides an online monitoring device for the operating temperature of a distribution transformer winding, which comprises a first voltage measuring module 1, a second voltage measuring module 2, a first current measuring module 3, a second current measuring module 4, a data collecting module 5, a data processing module 6, and a judgment and analysis module 7,
the first voltage measuring module 1 is arranged at the input end of the distribution transformer, the second voltage measuring module 2 is arranged at the outlet end of the distribution transformer, the first current measuring module 3 is arranged at the primary side of the distribution transformer, and the second current measuring module 4 is arranged at the secondary side of the distribution transformer;
the data acquisition module 5 is connected with the first voltage measurement module 1, the second voltage measurement module 2, the first current measurement module 3 and the second current measurement module 4, comprises a timer and a memory, and is used for acquiring measurement data of the first voltage measurement module 1, the second voltage measurement module 2, the first current measurement module 3 and the second current measurement module 4 at a first time t1 and a second time t 2;
the data processing module 6 is connected with the data acquisition module 5 and used for calculating and tracking the winding temperature rise;
the judgment and analysis module 7 is connected with the data processing module 6, comprises a trend analysis unit and a logic analysis unit, and is used for analyzing whether the temperature rise of the winding is in four states of data abnormity, serious abnormity, slight abnormity and insulation state deterioration.
Further, the device also comprises a display and alarm module 8 connected with the output end of the judgment and analysis module 7, and if the winding temperature rise is not in an abnormal state, the display and alarm module 8 displays the temperature rise of the winding of the distribution transformer through a display unit; if the temperature rise of the winding is in a data abnormal state, a serious abnormal state and a slight abnormal state, the display and alarm module 8 starts data abnormal prompt through the alarm unit; and if the winding temperature rise is in an insulation deterioration state, the display and alarm module 8 sends a tripping instruction through the tripping unit.
Further, the data processing module 6 includes an operating voltage calculating unit, an equivalent resistance calculating unit, and a winding temperature rise calculating unit, which are connected in sequence.
Further, the first voltage measuring module 1 and the second voltage measuring module 2 adopt a voltage transformer, and the first current measuring module 3 and the second current measuring module 4 adopt a current transformer.
Further, the data processing module 6 adopts a single chip controller or a DSP data processor.
Further, the data processing module 6 and the judgment analysis module 7 are connected through a wireless communication module 9, and the wireless communication module 7 is a Zigbee wireless communication module.
The distribution transformer winding operation temperature on-line monitoring device has the working process as follows:
1001, starting to perform online detection on the temperature of a winding of a distribution transformer;
step 1002, optional t1At the moment, a primary side current signal I passing through a distribution transformer is acquired by a data acquisition module 5Gt1Secondary side current signal ILt1；
Step 1003, a bus voltage transformer TV where the distribution transformer is located is obtained through a data acquisition module 51Secondary side of (a) obtaining t1Time voltage signal UGt1And a voltage transformer TV at the outgoing line side2Obtaining t1Time voltage signal ULt1；
Step 1004, optional t2Time (satisfy t)2-t1<4min), a current signal I passing through the primary side of the distribution transformer is acquired through the data acquisition module 5Gt2Secondary side current signal ILt2；
Step 1005, the data acquisition module 5 receives the bus voltage transformer TV from the distribution transformer1Secondary side of (a) obtaining t2Voltage signal U of timeGt2Outgoing line side voltage transformer TV2Is obtained t from the secondary side of the discharge coil2Voltage signal U of timeLt2；
Step 1007, operating the voltage calculating unit according to the formula
Calculating to obtain the operating voltage of the distribution transformer
Step 1008, operating the voltage calculation unit according to a formula
Calculating to obtain the operating voltage of the distribution transformer
Step 1009, the equivalent resistance calculating unit calculates according to the formula
Calculating to obtain the equivalent impedance of the winding of the distribution transformer, and taking the real part of the equivalent impedance as the equivalent resistance RΔt；
Step 1010, the winding temperature rise calculating unit calculates according to a formula
Calculating the temperature rise of the winding; wherein R isLeave factoryThe equivalent resistance value is obtained in a transformer factory test. t is t0For measuring equivalent resistance R at factoryLeave factoryThe reference temperature is generally 75 ℃;
step 1011, the data analysis module 7 compares the acquired distribution transformer winding temperature with 100 ℃ according to the abnormal state judgment standard, judges whether the insulation state of the distribution transformer winding is in an abnormal state, if not, executes step 1012, and if so, executes step 1013;
step 1012, the display unit normally displays the temperature rise of the winding of the distribution transformer;
step 1013, the data analysis module 7 determines whether the insulation is in a severe state in the abnormal state of the distribution transformer according to the severe abnormal state determination standard, if not, step 1014 is executed, and if so, step 1015 is executed;
step 1014, the data processing module 6 continuously tracks and records the temperature rise of the distribution transformer winding, and reduces the data acquisition and monitoring time of voltage and current;
step 1015, the data analysis module 7 judges whether the winding temperature rise of the distribution transformer is in a slight abnormal state under the abnormal state according to the judgment standard of the slight abnormal state, if not, step 1012 is executed, and if so, step 1016 is executed;
step 1016, the data processing module 6 continuously tracks the temperature rise of the winding and monitors the change of the voltage and the current;
step 1017, the data analysis module judges whether the insulation of the distribution transformer is deteriorated according to the insulation state deterioration judgment standard, if the insulation is not deteriorated, step 1018 is executed, otherwise, step 1019 is executed;
step 1018, the alarm unit starts a data exception prompting system;
step 1019, the trip unit issues a trip command.
Further, the data abnormal state determination criterion in step 1011 is that the distribution transformer winding temperature measured in step 1010 is compared with 100 ℃, if the measured distribution transformer winding temperature is greater than 100 ℃, it is determined to be an abnormal state, otherwise, it is not in an abnormal state.
Further, the severe abnormal state determination rule in step 1013: and comparing the winding temperature of the distribution transformer in the abnormal state with the hottest point temperature (105 ℃) of the distribution transformer winding specified by the existing standard, and judging the distribution transformer in the serious state if the winding temperature of the distribution transformer in the abnormal state exceeds the hottest point temperature.
Further, the mild abnormal condition determination criterion in step 1014: and (4) comparing the winding temperature obtained in the step 1010 with 100 ℃, and if the winding temperature does not exceed 100 +/-2%, judging the winding to be in a slight abnormal state.
Further, the insulation state deterioration judgment criterion in step 1017: and (3) comparing the winding temperature measured in the step 1010 with the hottest point temperature, simultaneously acquiring and monitoring the change conditions of the voltage and the current of the transformer, and if the winding temperature exceeds the hottest point temperature in the time period from the start of operation to delta t of the transformer and the current is obviously increased, judging the insulation deterioration of the distribution transformer, otherwise, judging the insulation deterioration of the distribution transformer is not deteriorated.
To sum up, the utility model provides a distribution transformer winding operating temperature on-line monitoring device, winding temperature in the real-time on-line monitoring distribution transformer actual operation, and can real-time on-line monitoring distribution transformer's running state, judge whether distribution transformer is in the dangerous state, it is more accurate to measure technical measurement result, can be according to the trend of change of its winding temperature rise simultaneously, discover the potential insulation defect that distribution transformer operation produced, guarantee distribution transformer safety and stability's operation, reduce the risk of the electric wire netting accident that arouses because of distribution transformer trouble.
It is right above the utility model provides a distribution transformer winding operating temperature on-line monitoring device has carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the present invention and its core ideas. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (6)
1. The utility model provides a distribution transformer winding operating temperature on-line monitoring device which characterized in that: comprises a first voltage measuring module (1), a second voltage measuring module (2), a first current measuring module (3), a second current measuring module (4), a data acquisition module (5), a data processing module (6) and a judgment analysis module (7),
the first voltage measuring module (1) is arranged at the input end of the distribution transformer, the second voltage measuring module (2) is arranged at the outlet end of the distribution transformer, the first current measuring module (3) is arranged at the primary side of the distribution transformer, and the second current measuring module (4) is arranged at the secondary side of the distribution transformer;
the data acquisition module (5) is connected with the first voltage measurement module (1), the second voltage measurement module (2), the first current measurement module (3) and the second current measurement module (4), comprises a timer and a memory and is used for acquiring a first time t1And a second time t2Measurement data of the first voltage measurement module (1), the second voltage measurement module (2), the first current measurement module (3) and the second current measurement module (4);
the data processing module (6) is connected with the data acquisition module (5) and is used for calculating and tracking the temperature rise of the winding;
the judgment and analysis module (7) is connected with the data processing module (6), comprises a trend analysis unit and a logic analysis unit and is used for analyzing whether the temperature rise of the winding is in four states of data abnormity, serious abnormity, light abnormity and insulation deterioration.
2. The on-line monitoring device for the operating temperature of the distribution transformer winding according to claim 1, characterized in that: the device also comprises a display and alarm module (8) connected with the output end of the judgment and analysis module (7), and if the winding temperature rise is not in an abnormal state, the display and alarm module (8) displays the temperature rise of the winding of the distribution transformer through a display unit; if the temperature rise of the winding is in a data abnormal state, a serious abnormal state and a slight abnormal state, the display and alarm module (8) starts data abnormal prompt through the alarm unit; if the winding temperature rise is in an insulation deterioration state, the display and alarm module (8) sends a tripping instruction through the tripping unit.
3. The on-line monitoring device for the operating temperature of the distribution transformer winding according to claim 1 or 2, characterized in that: the data processing module (6) comprises an operating voltage calculating unit, an equivalent resistance calculating unit and a winding temperature rise calculating unit which are sequentially connected.
4. The on-line monitoring device for the operating temperature of the distribution transformer winding according to claim 3, characterized in that: the first voltage measuring module (1) and the second voltage measuring module (2) adopt voltage transformers, and the first current measuring module (3) and the second current measuring module (4) adopt current transformers.
5. The on-line monitoring device for the operating temperature of the distribution transformer winding according to claim 3, characterized in that: the data processing module (6) adopts a single chip microcomputer controller or a DSP data processor.
6. The on-line monitoring device for the operating temperature of the distribution transformer winding according to claim 3, characterized in that: the data processing module (6) is connected with the judgment and analysis module (7) through a wireless communication module (9).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022763309.XU CN214225399U (en) | 2020-11-26 | 2020-11-26 | Distribution transformer winding operating temperature on-line monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022763309.XU CN214225399U (en) | 2020-11-26 | 2020-11-26 | Distribution transformer winding operating temperature on-line monitoring device |
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| CN214225399U true CN214225399U (en) | 2021-09-17 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113961023A (en) * | 2021-10-25 | 2022-01-21 | 福建省力得自动化设备有限公司 | Temperature control system based on dry-type transformer |
| CN114228784A (en) * | 2021-12-31 | 2022-03-25 | 成都华动科技有限公司 | Locomotive vehicle electrical risk sensing system |
| CN114355070A (en) * | 2021-12-01 | 2022-04-15 | 国网天津市电力公司营销服务中心 | Public transformer load type analysis and identification method based on big data technology |
-
2020
- 2020-11-26 CN CN202022763309.XU patent/CN214225399U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113961023A (en) * | 2021-10-25 | 2022-01-21 | 福建省力得自动化设备有限公司 | Temperature control system based on dry-type transformer |
| CN114355070A (en) * | 2021-12-01 | 2022-04-15 | 国网天津市电力公司营销服务中心 | Public transformer load type analysis and identification method based on big data technology |
| CN114228784A (en) * | 2021-12-31 | 2022-03-25 | 成都华动科技有限公司 | Locomotive vehicle electrical risk sensing system |
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