CN204789779U - Distribution transformer transformation ratio measuring apparatu - Google Patents
Distribution transformer transformation ratio measuring apparatu Download PDFInfo
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- CN204789779U CN204789779U CN201520434674.2U CN201520434674U CN204789779U CN 204789779 U CN204789779 U CN 204789779U CN 201520434674 U CN201520434674 U CN 201520434674U CN 204789779 U CN204789779 U CN 204789779U
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- 230000009466 transformation Effects 0.000 title abstract 5
- 238000005259 measurement Methods 0.000 claims abstract description 29
- 238000004891 communication Methods 0.000 claims abstract description 27
- 238000012545 processing Methods 0.000 claims abstract description 12
- 230000003750 conditioning effect Effects 0.000 claims description 19
- 238000005516 engineering process Methods 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 4
- 238000013024 troubleshooting Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 238000000354 decomposition reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
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Abstract
The utility model discloses a distribution transformer transformation ratio measuring apparatu. Distribution transformer transformation ratio measuring apparatu includes: a secondary measured module and control for measuring the elementary measured module of distribution transformer high -pressure side voltage, electric current, be used for measuring distribution transformer low voltage side voltage, electric current elementary measured module and secondary measured module's controller. Elementary measured module, secondary measured module include: a current signal collection system, with for gathering voltage signal's voltage signal collection system, be used for gathering the current signal the controller carries out the communication module and the control of communicating voltage signal collection system, current signal collection system and communication module's processing module. The utility model discloses distribution transformer transformation ratio measuring apparatu is real -time measurement play distribution transformer's transformation ratio very conveniently to regulation and control, troubleshooting for distribution transformer provide the reference frame.
Description
Technical field
The utility model relates to technical field of electric power, particularly relates to a kind of substation transformer no-load voltage ratio measuring instrument.
Background technology
In a period of time that past is very long, the electric power supply of China is all in tension, and therefore people have only been placed on focus above electric power supply, and less to the concern of the quality of power supply.Since the eighties in 20th century, along with progressively alleviating of power supply shortage situation and improving constantly that power consumer requires the quality of power supply, the quality of power supply asks that you have become the main focus of power department and power consumer.When voltage fluctuation exceedes the scope of permission and the time is longer, this improper voltage will cause high risks, such as: affect the operation of power-supply unit, reduce power supply reliability, reduce the serviceable life of consumer, increase line loss etc.In recent years, along with the development of metallurgical industry, chemical industry and electric railroad, non-linear electrical equipment gets more and more, thus makes the voltage waveform generation Severe distortion of electric system.Not only bring serious harm to the equipment of power-supply unit, power consumer, and bring greater loss to national economy.
For this reason, power supply department can carry out timely trip stop according to season, network load variation to substation transformer.Due to cannot observe match with substation transformer off circuit tap changer gear, there is no account record, after accidental power failure, the gear of off circuit tap changer is positioned at maximum.Now restore electricity, described off circuit tap changer can because gear not to and electrical network is had a power failure again, thus increase the probability of accidental power failure.
In view of the above problems, be necessary to provide a kind of portable power distribution transformer voltage ratio measuring instrument, to solve the problem.
Summary of the invention
For the deficiencies in the prior art, the technical matters that the utility model solves is to provide a kind of substation transformer no-load voltage ratio measuring instrument, this substation transformer no-load voltage ratio measuring instrument can measure the no-load voltage ratio of substation transformer easily in real time, thus provides reference frame for the regulation and control of substation transformer, failture evacuation.
For solving the problems of the technologies described above, the technical solution of the utility model is achieved in that
A kind of substation transformer no-load voltage ratio measuring instrument, comprising: elementary measurement module, and described elementary measurement module is used for measuring the on high-tension side voltage of substation transformer, electric current; Secondary measurement module, described secondary measurement module is used for measuring voltage, the electric current of substation transformer low-pressure side; Controller, described controller is in order to control described elementary measurement module and secondary measurement module; Described elementary measurement module, secondary measurement module all comprise: be used for gather voltage signal voltage signal acquisition device, be used for gather current signal current signal collection device, carry out the communication module communicated and the processing module controlling described voltage signal acquisition device, current signal collection device and communication module with described controller.
Further, described voltage signal acquisition device comprises the first electric capacity and the second electric capacity with described first capacitances in series, one end ground connection of described first electric capacity, described one end of second electric capacity is connected with the high-pressure side of substation transformer or low pressure end, the voltage of what described voltage signal acquisition device exported is the first electric capacity.
Further, described substation transformer no-load voltage ratio measuring instrument also comprises the voltage signal conditioning device be connected with described voltage signal acquisition device and the current signal conditioning device be connected with current signal collection device, and voltage signal, current signal amplify by described voltage signal conditioning device, current signal conditioning device respectively, filtering it is converted to the standard signal that described processing module can identify.
Further, described current signal collection device is current transformer.
Further, described communication module is communicated with described controller by general packet radio service technology or ZigBee wireless communication technology.
Further, described substation transformer no-load voltage ratio measuring instrument also comprises locating module, and described locating module is GPS or BEI-DOU position system.
Further, described controller comprise for display substation transformer no-load voltage ratio display unit, be used for manual input parameter input block, be used for the communication unit carrying out with communication module communicating and the positioning unit being used for carrying out location, position.
Further, described display unit is LCDs.
Further, described input block is keyboard.
The beneficial effects of the utility model are: compared to prior art, and substation transformer no-load voltage ratio measuring instrument described in the utility model can measure the no-load voltage ratio of substation transformer easily in real time, thus provide reference frame for the regulation and control of substation transformer, failture evacuation.
Accompanying drawing explanation
Figure 1 shows that the module diagram of the utility model substation transformer no-load voltage ratio measuring instrument.
Figure 2 shows that the structural representation of elementary measurement module, secondary measurement module.
Figure 3 shows that the module diagram of controller.
The calculation flow chart of the no-load voltage ratio of substation transformer shown in Fig. 4 value.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly, below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail.The example of these preferred implementations illustrates in the accompanying drawings.Shown in accompanying drawing and the embodiment of the present utility model described with reference to the accompanying drawings be only exemplary, and the utility model is not limited to these embodiments.
Refer to shown in Fig. 1, the utility model substation transformer no-load voltage ratio measuring instrument 100 comprise for measure substation transformer high side voltage, electric current elementary measurement module 10, be used for measuring substation transformer low-pressure side voltage, electric current secondary measurement module 20 and receive and process the controller 30 of the data measured by described elementary measurement module 10 and secondary measurement module 20.
Refer to shown in Fig. 2, described elementary measurement module 10, secondary measurement module 20 all comprises the voltage signal acquisition device 41 for gathering voltage signal, the voltage signal conditioning device 42 that the signal gathered described voltage signal acquisition device 41 processes, be used for gathering the current signal collection device 43 of current signal, the current signal conditioning device 44 that the current signal gathered described current signal collection device 43 processes, the communication module 45 that communicates is carried out with described controller 30, carry out the locating module 46 of location, position, control described voltage signal conditioning device 42, current signal conditioning device 44, the processing module 47 of communication module 45 and locating module 46 and be the power module 48 of described processing module 47 power supply.
Refer to shown in Fig. 2, the second electric capacity 412 that described voltage signal acquisition device 41 comprises the first electric capacity 411 and connects with described first electric capacity 411.One end ground connection of described first electric capacity 411, the other end is connected with described second electric capacity 412.Described second electric capacity 412 deviates from described one end of first electric capacity 411 and is connected with the high-pressure side of substation transformer or low pressure end.Described voltage signal conditioning device 42 is in parallel with described first electric capacity 411.By the dividing potential drop of described first electric capacity 411, second electric capacity 412, thus the magnitude of voltage that described voltage signal acquisition device 41 is exported is no more than the receptible maximal value of described voltage signal conditioning device 42.The voltage signal that described voltage signal conditioning device 42 collects described voltage signal acquisition device 41 amplifies, filtering it is converted to the standard signal that described processing module 47 can identify.Described current signal collection device 43 is current transformer.The current signal transfer that detects is given described current signal conditioning device 44 by described current transformer.Described current signal conditioning device 44 amplifies the current signal collected described in described current signal collection device 43, filtering it is converted to the standard signal that described processing module 47 can identify.Described communication module 45 is communicated with described controller 30 by general packet radio service technology (GPRS) or ZigBee wireless communication technology, gives described controller 30 with the voltage signal described processing module 47 received, current signal transfer.In the present embodiment, described communication module 45 wirelessly communicates with described controller 30, but in other embodiments, described communication module 45 can also be communicated with described controller 30 by wired mode.Described locating module 46 is GPS (GPS) or BEI-DOU position system, to position described elementary measurement module 10 or secondary measurement module 20.Described processing module 47 is single-chip microcomputer, controls described voltage signal conditioning device 42, current signal conditioning device 44, communication module 45 and locating module 46.Described power supply 48 is powered for described processing module 47.
Refer to shown in Fig. 3, described controller 30 comprise for display substation transformer no-load voltage ratio display unit 31, be used for manual input parameter input block 32, be used for carrying out the communication unit 33 communicated, the positioning unit 34 being used for carrying out location, position, the processor 35 controlling described display unit 31, input block 32, communication unit 33 and positioning unit 34 and the power supply 36 of powering for described processor 35 with described communication module 45.Described display unit 31 is LCDs.Described input block 32 is keyboard, so that manual input parameter.Described communication unit 33 is communicated with described communication module 45 by general packet radio service technology (GPRS) or ZigBee wireless communication technology.Described positioning unit 34 is GPS (GPS) or BEI-DOU position system.Described processor 35 is single-chip microcomputer.Described power supply 36 is powered for described processor 35.
When using substation transformer no-load voltage ratio measuring instrument 100 described in the utility model, first elementary measurement module 10, secondary measurement module 20 being received respectively high-pressure side, the low pressure end of substation transformer, then reading no-load voltage ratio value from described controller 30.Compared to prior art, substation transformer no-load voltage ratio measuring instrument 100 described in the utility model can measure the no-load voltage ratio of substation transformer easily in real time, thus provides reference frame for the regulation and control of substation transformer, failture evacuation.
The measuring method of above-mentioned substation transformer no-load voltage ratio is as follows:
S1: the current signal, the voltage signal that gather the on high-tension side current signal of substation transformer, voltage signal and low-pressure side;
S2: the high side voltage signal collected, low-pressure side voltage signal are synthesized respectively, is decomposed into phase current respectively by the high voltage side current signal collected, low-pressure side current signal;
S3: the voltage signal after the voltage signal after being synthesized high-pressure side, low-pressure side synthesis carries out FFT decomposition, the phase current signal after the phase current signal after being decomposed high-pressure side, low-pressure side decomposition carries out FFT decomposition;
S4: calculate the voltage ratio of each harmonic, electric current ratio, voltage ratio=high pressure side line voltage/low pressure side line voltage, electric current ratio=low-pressure side line current/high-pressure side line current;
S5: if fundamental current is less than 5% of rated current, then the weight of voltage ratio is 0% to 50%; Otherwise the weight of electric current ratio is 50% to 100%;
S6: weighted average calculation each harmonic no-load voltage ratio.
High according to the substation transformer no-load voltage ratio value precision that the method is calculated, be conducive to staff and grasp substation transformer no-load voltage ratio in real time, accurately, provide foundation for staff regulates and controls substation transformer.
Claims (9)
1. a substation transformer no-load voltage ratio measuring instrument, is characterized in that, comprising:
Elementary measurement module, described elementary measurement module is used for measuring the on high-tension side voltage of substation transformer, electric current;
Secondary measurement module, described secondary measurement module is used for measuring voltage, the electric current of substation transformer low-pressure side;
Controller, described controller is in order to control described elementary measurement module and secondary measurement module;
Described elementary measurement module, secondary measurement module all comprise: be used for gather voltage signal voltage signal acquisition device, be used for gather current signal current signal collection device, carry out the communication module communicated and the processing module controlling described voltage signal acquisition device, current signal collection device and communication module with described controller.
2. substation transformer no-load voltage ratio measuring instrument as claimed in claim 1, it is characterized in that: described voltage signal acquisition device comprises the first electric capacity and the second electric capacity with described first capacitances in series, one end ground connection of described first electric capacity, described one end of second electric capacity is connected with the high-pressure side of substation transformer or low pressure end, the voltage of what described voltage signal acquisition device exported is the first electric capacity.
3. substation transformer no-load voltage ratio measuring instrument as claimed in claim 1, it is characterized in that: described substation transformer no-load voltage ratio measuring instrument also comprises the voltage signal conditioning device be connected with described voltage signal acquisition device and the current signal conditioning device be connected with current signal collection device, voltage signal, current signal amplify by described voltage signal conditioning device, current signal conditioning device respectively, filtering it is converted to the standard signal that described processing module can identify.
4. substation transformer no-load voltage ratio measuring instrument as claimed in claim 1, is characterized in that: described current signal collection device is current transformer.
5. substation transformer no-load voltage ratio measuring instrument as claimed in claim 1, is characterized in that: described communication module is communicated with described controller by general packet radio service technology or ZigBee wireless communication technology.
6. substation transformer no-load voltage ratio measuring instrument as claimed in claim 1, is characterized in that: described substation transformer no-load voltage ratio measuring instrument also comprises locating module, and described locating module is GPS or BEI-DOU position system.
7. substation transformer no-load voltage ratio measuring instrument as claimed in claim 1, is characterized in that: described controller comprise for display substation transformer no-load voltage ratio display unit, be used for manual input parameter input block, be used for the communication unit carrying out with communication module communicating and the positioning unit being used for carrying out location, position.
8. substation transformer no-load voltage ratio measuring instrument as claimed in claim 7, is characterized in that: described display unit is LCDs.
9. substation transformer no-load voltage ratio measuring instrument as claimed in claim 7, is characterized in that: described input block is keyboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520434674.2U CN204789779U (en) | 2015-06-23 | 2015-06-23 | Distribution transformer transformation ratio measuring apparatu |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520434674.2U CN204789779U (en) | 2015-06-23 | 2015-06-23 | Distribution transformer transformation ratio measuring apparatu |
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| CN204789779U true CN204789779U (en) | 2015-11-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104865455A (en) * | 2015-06-23 | 2015-08-26 | 江苏省电力公司苏州供电公司 | Distribution transformer transformation ratio measuring instrument and measuring method |
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- 2015-06-23 CN CN201520434674.2U patent/CN204789779U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104865455A (en) * | 2015-06-23 | 2015-08-26 | 江苏省电力公司苏州供电公司 | Distribution transformer transformation ratio measuring instrument and measuring method |
| CN104865455B (en) * | 2015-06-23 | 2018-02-09 | 江苏省电力公司苏州供电公司 | Distribution transformer no-load voltage ratio measuring instrument and its measuring method |
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