CN205229270U - Large power supply transformer no -load current measuring device - Google Patents

Large power supply transformer no -load current measuring device Download PDF

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Publication number
CN205229270U
CN205229270U CN201520954653.3U CN201520954653U CN205229270U CN 205229270 U CN205229270 U CN 205229270U CN 201520954653 U CN201520954653 U CN 201520954653U CN 205229270 U CN205229270 U CN 205229270U
Authority
CN
China
Prior art keywords
transformer
load current
control module
micro
measurement mechanism
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201520954653.3U
Other languages
Chinese (zh)
Inventor
马奎
穆海宝
吴旭涛
赵思翔
艾绍贵
张冠军
高博
张锐
吴波
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
Xian Jiaotong University
Electric Power Research Institute of State Grid Ningxia Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
Xian Jiaotong University
Electric Power Research Institute of State Grid Ningxia Electric Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by State Grid Corp of China SGCC, Xian Jiaotong University, Electric Power Research Institute of State Grid Ningxia Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201520954653.3U priority Critical patent/CN205229270U/en
Application granted granted Critical
Publication of CN205229270U publication Critical patent/CN205229270U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model relates to a large power supply transformer no -load current measuring device. Its characteristics are: including little control module, thereby control module is connected the collection current signal with data acquisition module, current sensor in proper order a little, and control module still is connected with module of wireless radio frequency and GPS module respectively a little. The utility model provides a large power supply transformer no -load current measuring device, the device can measure the no -load current of large power supply transformer in the transformer substation, provides the basis for mastering the transformer state.

Description

Large-scale power transformer no-load current measurement mechanism
Technical field
The utility model relates to a kind of large-scale power transformer no-load current measurement mechanism.
Background technology
Along with the development of national economy and the progress of state-of-the-art technology, day by day increase the demand of electric power, the grade of rated voltage of electric system and rated current are all greatly improved and increase.As the power transformer of electrical network nucleus equipment, the safety and stability of its operational reliability direct relation electric system.Along with the increase running the time limit, and long-term running environment is severe, and transformer is aging, loss is increased, defect increases, and its operational reliability also can be deteriorated, and the safe operation of electrical network in serious threat.The manufacturing process of no-load transformer electric current and transformer, the method for operation and power supply quality are relevant.By the no-load current of measuring transformer and carry out laterally, longitudinally contrast, find the local in magnetic circuit or general defect, check between coil turn, whether layer insulation good, electrical steel insulation between plates situation and assembly quality etc.Correct judgement for these defects all depends on no-load current Measurement accuracy.The no-load current family curve of transformer will provide contrast foundation for later transformer runs detection.
Transformer, in the process manufactured and in handing-over preventive trial, carries out no-load test to transformer and measures no-load current.And for the large-scale power transformer in transformer station, no-load current is measured, need transformer to stop transport, and need the testing equipment such as experimental power supply, step-up transformer and checkout equipment, the human and material resources of at substantial and time, performance difficulty.
Utility model content
The purpose of this utility model is to provide a kind of large-scale power transformer no-load current measurement mechanism, can facilitate Measurement accuracy no-load transformer electric current, for Transformer State Assessment and operation detection provide foundation.
A kind of large-scale power transformer no-load current measurement mechanism, its special feature is: comprise micro-control module, this micro-control module is connected with data acquisition module, current sensor successively thus gathers current signal, and this micro-control module is also connected with wireless radio frequency modules and GPS module respectively.
Wherein data acquisition module is also connected with micro-control module by data memory module.
Wherein also comprise solar cell for supplying power device, this solar cell for supplying power device is connected with micro-control module thus powers.
Wherein be provided with relay switching circuit at the input end of current sensor, the control end of this relay switching circuit is connected with micro-control module.
Wherein micro-control module is arranged in an aluminum enclosure, and this aluminum enclosure is fixedly mounted on high voltage side of transformer outlet conductive pole by web member.
The utility model provides a kind of large-scale power transformer no-load current measurement mechanism, and this device can measure the no-load current of large-scale power transformer in transformer station, provides foundation for grasping transformer state.Large-scale power transformer no-load current measurement mechanism utilizes network system to power to step-up side, gathers the no-load current of power transformer, solves on-the-spot no-load transformer current measurement to the requirement of experimental power supply.When transformer power-off is overhauled, large-scale power transformer no-load current measurement mechanism is arranged on high voltage side of transformer outlet conductive pole.By giving the energising of transformer high-voltage winding, disconnect low pressure winding.At high voltage side of transformer access electrical network, when low-pressure side disconnecting consumers, measuring transformer no-load current.Large-scale power transformer no-load current measurement mechanism solves step-up side installation question, and can bear the interference of Transformer Close surge impact, achieves no-load current data sampling and wireless transmission.After measurement completes, low-pressure side is accessed load, transformer gets final product normal operation input.Accurately and reliably, measuring process is convenient and swift for measurement result.
Accompanying drawing explanation
Accompanying drawing 1 is logic theory block diagram of the present invention;
Accompanying drawing 2 is using state schematic diagram of the present invention.
Embodiment
As shown in Figure 1, 2, the utility model provides a kind of large-scale power transformer no-load current measurement mechanism, comprise micro-control module, wherein micro-control module is arranged in an aluminum enclosure 2, and this aluminum enclosure 2 is fixedly mounted on the web member on high voltage side of transformer outlet conductive pole 1.This micro-control module is connected with data acquisition module, current sensor successively thus gathers current signal, and this micro-control module is also connected with wireless radio frequency modules and GPS module respectively.
Wherein data acquisition module is also connected with micro-control module by data memory module, also comprises solar cell for supplying power device, and this solar cell for supplying power device is connected with micro-control module thus powers.Be provided with relay switching circuit at the input end of current sensor in addition, the control end of this relay switching circuit is connected with micro-control module.
Embodiment 1:
When transformer power-off is overhauled, large-scale power transformer no-load current measurement mechanism of the present utility model is arranged on high voltage side of transformer outlet conductive pole 1.By giving the energising of transformer high-voltage winding, disconnect low pressure winding.At high voltage side of transformer access electrical network, when low-pressure side disconnecting consumers, measuring transformer no-load current.After measurement completes, low-pressure side is accessed load, transformer puts into operation.
(1) large-scale power transformer no-load current measurement mechanism of the present utility model, by compositions such as current sensor, data acquisition module, data memory module, wireless radio frequency modules, GPS module, micro-control unit (micro-control module, i.e. microprocessor, microcontroller or single-chip microcomputer), solar battery apparatus.
(2) measurement mechanism is arranged on high voltage side of transformer outlet conductive pole 1, the on high-tension side no-load current of measuring transformer.
(3) according to the feature of no-load current, adopt special small electric current sensor, range is 0 ~ 2A, precision Gao Keda 0.1% during measurement no-load current.
(4) data acquisition module high-speed sampling, sampling rate, can accurate reproduction no-load current waveform up to 100kHz.
(5) relay is set before data acquisition module, it is protected.Prevent the inrush phenomenon produced during transformer switching from producing superpotential in Current Transformer Secondary side, circuit board is caused damage.During transformer switching, relay is disconnected, circuit is isolated; After entering stable state, relay closes sampled, circuit is started working.
(6) data storing that will collect of data memory module, the NandFlash of storage adopts SPI interface, has higher read or write speed, meets the rate request adopting and store.
(7) wireless radio frequency modules adopts the band spectrum modulation communication technology, carries out Long-distance Control and telecommunication, solves Insulation Problems when high pressure or extra-high voltage measurement, ensures safety when measuring.Wireless radio frequency modules can be arranged harvester according to teleinstruction, arranges the sampling time.Also can measurement data in called data memory module by wireless radio frequency modules.
(8) measurement mechanism uses GPS unit to carry out time service, can prevent on-the-spot interference, carry out the sampling of no-load current in the time preset.
(9) device adopts aluminium casing protection internal precision circuit, and the electromagnetic environment interference preventing it to be subject to on-the-spot complexity, ensures that each unit normally runs.
(10) adopt solar cell to power to measurement mechanism, avoid changing battery and device is dismantled.After device one-step installation, on high voltage side of transformer outlet conductive pole 1 measurement can be arranged on for a long time more.
Using method of the present utility model and principle of work are:
Large-scale power transformer no-load current measurement mechanism of the present utility model adopts network system to power to step-up side, gathers the no-load current of power transformer, solves on-the-spot no-load transformer current measurement to the requirement of experimental power supply.When transformer power-off is overhauled, large-scale power transformer no-load current measurement mechanism is arranged on high voltage side of transformer outlet conductive pole 1.By giving the energising of transformer high-voltage winding, disconnect low pressure winding.At high voltage side of transformer access electrical network, when low-pressure side disconnecting consumers, measuring transformer no-load current.Large-scale power transformer no-load current measurement mechanism solves step-up side installation question, and can bear the interference of Transformer Close surge impact, achieves no-load current data sampling and wireless transmission.After measurement completes, low-pressure side is accessed load, transformer gets final product normal operation input.

Claims (5)

1. a large-scale power transformer no-load current measurement mechanism, it is characterized in that: comprise micro-control module, this micro-control module is connected with data acquisition module, current sensor successively thus gathers current signal, and this micro-control module is also connected with wireless radio frequency modules and GPS module respectively.
2. large-scale power transformer no-load current measurement mechanism as claimed in claim 1, is characterized in that: wherein data acquisition module is also connected with micro-control module by data memory module.
3. large-scale power transformer no-load current measurement mechanism as claimed in claim 1, it is characterized in that: wherein also comprise solar cell for supplying power device, this solar cell for supplying power device is connected with micro-control module thus powers.
4. large-scale power transformer no-load current measurement mechanism as claimed in claim 1, it is characterized in that: be wherein provided with relay switching circuit at the input end of current sensor, the control end of this relay switching circuit is connected with micro-control module.
5. as the large-scale power transformer no-load current measurement mechanism in Claims 1-4 as described in any one, it is characterized in that: wherein micro-control module is arranged in an aluminum enclosure (2), and this aluminum enclosure (2) is fixedly mounted on high voltage side of transformer outlet conductive pole (1) by web member.
CN201520954653.3U 2015-11-26 2015-11-26 Large power supply transformer no -load current measuring device Expired - Fee Related CN205229270U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520954653.3U CN205229270U (en) 2015-11-26 2015-11-26 Large power supply transformer no -load current measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520954653.3U CN205229270U (en) 2015-11-26 2015-11-26 Large power supply transformer no -load current measuring device

Publications (1)

Publication Number Publication Date
CN205229270U true CN205229270U (en) 2016-05-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201520954653.3U Expired - Fee Related CN205229270U (en) 2015-11-26 2015-11-26 Large power supply transformer no -load current measuring device

Country Status (1)

Country Link
CN (1) CN205229270U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105334372A (en) * 2015-11-26 2016-02-17 国家电网公司 No-load current measurement device of large-size power transformer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105334372A (en) * 2015-11-26 2016-02-17 国家电网公司 No-load current measurement device of large-size power transformer

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20160511

Termination date: 20211126