CN204330894U - A kind of transformer loss proving installation - Google Patents
A kind of transformer loss proving installation Download PDFInfo
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- CN204330894U CN204330894U CN201420789927.3U CN201420789927U CN204330894U CN 204330894 U CN204330894 U CN 204330894U CN 201420789927 U CN201420789927 U CN 201420789927U CN 204330894 U CN204330894 U CN 204330894U
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Abstract
The utility model relates to a kind of transformer loss proving installation, particularly the proving installation of a kind of transformer noload losses and load loss parameter, belongs to transformer technology field.This transformer loss proving installation, comprising the supply module, electricity ginseng input processing module and the human-computer interaction module that are electrically connected to each other, is optical coupling isolation device between electricity ginseng input processing module and human-computer interaction module.The compact structure of this product is light, and measuring accuracy is high, and cost is lower.
Description
Technical field
The utility model relates to a kind of transformer loss proving installation, particularly the proving installation of a kind of transformer noload losses and load loss parameter, belongs to transformer technology field.
Background technology
In recent years, along with the development and progress of electric utility, the continuous increase of power load, power transformer product field constantly adopts new material and new technology, especially, in the manufacturing of substation transformer, novel energy-economic transformer is constantly updated and is regenerated, towards low-loss, small size future development.Transformer be defeated, become, most important equipment in distribution system, also be the maximum electrical equipment of energy ezpenditure, for improving the work efficiency of transformer, energy-conservation of consumption reduction, national correlation department was issued the documents once and is required to transform transformer with high energy consumption or upgrade, and the relevant featuring parameters of test transformer is the prerequisite renovated.According to the requirement of transformer economic operation, if Capacity Selection is too little, transformer overload operation can be caused, transformer may be caused to burn; If Capacity Selection is too large, occur " low load with strong power " phenomenon, transformer capacity can not make full use of, and open circuit loss increases.
Current power supply department is to the examination of the substation transformer networked and detect and mostly also only carry out conventional detection, as: direct current resistance, no-load voltage ratio, the conventional project such as withstand voltage, the loss characteristic parameter for transformer does not also carry out strict full Performance Detection.It is reported, current domestic increasing power supply enterprise is detected in the urgent need to carrying out transformer capacity and drain performance, to reach following object:
(1) capacity of the transformer of new network access and loss parameter are measured, stop counterfeit and High-loses Transformer network access.
(2) transformer of hanging net operation is generally investigated, the transformer of High-loses Transformer and false nameplate is renovated.
(3) to high loss or defective and wouldn't the be retired transformer of on-line operation, charging way is changed.
This type of proving installation in the market needs external power supply mostly, brings inconvenience to on-the-spot test.In addition, most of device adopts Single-chip Controlling A/D chip to sample to three-phase ac signal simultaneously and synchronously calculates, and complex structure, calculated amount are large and precision is difficult to guarantee.
Utility model content
The purpose of this utility model overcomes the problems referred to above existing in prior art, through a large amount of tests and exploration, according to structural principle and the national standard of existing transformer, utilize three-phase voltage effective value, fundamental relation between current effective value and active power volume calculates active loss parameter.Device built-in lithium battery, portable construction is small and exquisite, quick, effective, high-precisionly can complete the transformer loss proving installation of transformer.
The utility model solves the problems of the technologies described above adopted technical scheme: this transformer loss proving installation, comprise the supply module, electricity ginseng input processing module and the human-computer interaction module that are electrically connected to each other, be optical coupling isolation device between electricity ginseng input processing module and human-computer interaction module, it is characterized in that
Described electricity ginseng input processing module comprises current detection circuit, voltage detecting circuit, three-phase electrical energy computation chip and reference source, and described current detection circuit, voltage detecting circuit and reference source are electrically connected with three-phase electrical energy computation chip respectively.
as preferably, described human-computer interaction module comprises interactive processor, LCD MODULE, input through keyboard module, printout module, E2PROM storer and RTC real-time clock, and described LCD MODULE, input through keyboard module, printout module, E2PROM storer and RTC real-time clock are electrically connected with interactive processor respectively.
as preferably, described current detection circuit comprises the current transformer and low-pass filter circuit that are electrically connected to each other.
as preferably, described supply module comprises battery module and DC-DC isolation module, and described human-computer interaction module is that battery module is powered by DC-DC isolation module.
as preferably, described battery module is lithium battery power supply module, comprises the battery charger, battery flowmeter charge circle, negative supply change-over circuit and the lithium battery that are electrically connected to each other.
as preferably, described three-phase electrical energy computation chip is ADE7880 chip, ADE7880 built-in chip type 7 ADC, digital integrator and reference voltage source circuits.
as preferably, described interactive processor is the STC90C514 single-chip microcomputer of band 56K Flash.
as preferably, described LCD MODULE is 240*128 lattice lcd.
as preferably, described printout module is low-power consumption thermal printer, and interactive processor realizes data interaction by serial communication.
as preferably, described E2PROM storer is the AT24C64 of 64K capacity, and RTC real-time clock is PCF8563 chip, and both is all received on interactive processor by I2C bus.
The beneficial effects of the utility model are:
1, this device built-in lithium battery, compact structure is light, is easy to carry and outdoor site test.
2, the present invention adopts high precision three-phase electrical energy computation chip in signal sampling Treatment Design, can the information such as voltage effective value, current effective value, active power, power factor of Real-time Obtaining three-phase supply, do not need to be obtained by numerous and diverse calculating, decrease the computation burden of processor, improve real-time and the reliability of system.Measuring accuracy is high, and error is less than 0.1%.
3, the present invention can carry out automatic calibration to test result, corrects, make test result accuracy higher under such as temperature correction, non-rated voltage, non-rated current test condition; Relax drain performance test in the past simultaneously and will reach the specified test condition of transformer, facilitate test.
4, this device can carry out frequency analysis to the three-phase voltage of input, electric current, synchronously calculates the irregularity of wave form of input voltage, electric current, further can correct, make result more accurate to the test result of transformer loss performance.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is the present embodiment software control schematic flow sheet.
Label declaration: supply module 1, battery module 11, DC-DC isolation module 12, electricity ginseng input processing module 2, current detection circuit 21, voltage detecting circuit 22, three-phase electrical energy computation chip 23, reference source 24, human-computer interaction module 3, interactive processor 31, LCD MODULE 32, input through keyboard module 33, printout module 34, E2PROM storer 35, RTC real-time clock 36, optical coupling isolation device 4.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Embodiment one: see Fig. 1, in the present embodiment, this device comprises the supply module 1, electricity ginseng input processing module 2 and the human-computer interaction module 3 that are electrically connected to each other, be optical coupling isolation device 4 between electricity ginseng input processing module 2 and human-computer interaction module 3, to reach the object of device stability and security.
Electricity ginseng input processing module 2 in the present embodiment comprises current detection circuit 21, voltage detecting circuit 22, three-phase electrical energy computation chip 23 and reference source 24, described current detection circuit 21, voltage detecting circuit 22 and reference source 24 are electrically connected with three-phase electrical energy computation chip 23 respectively, in addition, this module also comprises the supply module 1 providing electric energy, and supply module 1 comprises battery module 11 and DC-DC isolation module 12.
The present embodiment is in zero load, load loss proving installation, current detection circuit 21 comprises current transformer and low-pass filter circuit, voltage signal detects by being input to low-pass filter circuit after electric resistance partial pressure, and the three-phase voltage processed after filtering, current signal are finally input to electric energy computation chip and process.Three-phase electrical energy computation chip 23 is ADE7880, ADE7880 built-in 7 ADC, digital integrator and reference voltage source circuits, enormously simplify the design of peripheral circuit, adds reliability, and reduce cost; This chip from motion tracking fundamental frequency, respectively can all have system calibration function (effective value mistuning calibration function, phase alignment and gain calibration) mutually.Therefore, can realize high-precision measurement requirement, the measuring error of voltage, current effective value is all less than 0.1%.
Lithium battery power supply module 1 described in device, comprises battery charger, battery flowmeter charge circle and negative supply change-over circuit.Monitoring cell electricity quantity converts frequency signal by KA331 chip to voltage signal and is input to single-chip microcomputer again to realize.
Human-computer interaction module 3 in the present embodiment, mainly comprise interactive processor 31, LCD MODULE 32, input through keyboard module 33, printout module 34, E2PROM storer 35 and RTC real-time clock 36, the power supply of this part is that battery is realized by DC-DC isolation module 12.
The present embodiment is in the human-computer interaction module 3 of zero load, load loss proving installation, interactive processor 31 is STC90C514 single-chip microcomputers of band 56K Flash, LCD MODULE 32 is 240*128 lattice lcds, display module and Keysheet module are the parallel ports of directly being received single-chip microcomputer by latch, convenient expansion; Printer is low-power consumption thermal printer, and single-chip microcomputer realizes data interaction by serial communication; Outside E2PROM storer 35 is AT24C64 of 64K capacity, and real-time clock is PCF8563 chip, and both is all received on single-chip microcomputer by I2C bus.
Embodiment two:
As shown in Figure 2, single-chip microcomputer is by SPI Interface Controller ADE7880 for the control flow of the present embodiment.System electrification, single-chip microcomputer starts kernel initialization and the initialization of ADE7880 chip configuration, then three-phase gain calibration data, the phase alignment data of reading and saving in E2PROM, is then loaded in system variable.Program starts the three phase electrical parameters of the tested transformer of Real-time Collection, comprise three-phase current effective value, voltage effective value, phase differential, active power etc., then in certain time interval (being generally 0.5 second), be averaged computing to these data, final data substitute into calculation of capacity formula and obtain actual capacity value.Finally, result is shown on liquid crystal, needs printing test result according to test.
Above content described in this instructions is only to the explanation of the utility model structure example.The utility model person of ordinary skill in the field can make various amendment or supplements or adopt similar mode to substitute to described specific embodiment; only otherwise depart from structure of the present utility model or surmount this scope as defined in the claims, protection domain of the present utility model all should be belonged to.
Claims (10)
1. a transformer loss proving installation, comprises the supply module, electricity ginseng input processing module and the human-computer interaction module that are electrically connected to each other, is optical coupling isolation device, it is characterized in that between electricity ginseng input processing module and human-computer interaction module,
Described electricity ginseng input processing module comprises current detection circuit, voltage detecting circuit, three-phase electrical energy computation chip and reference source, and described current detection circuit, voltage detecting circuit and reference source are electrically connected with three-phase electrical energy computation chip respectively.
2. transformer loss proving installation according to claim 1, it is characterized in that: described human-computer interaction module comprises interactive processor, LCD MODULE, input through keyboard module, printout module, E2PROM storer and RTC real-time clock, described LCD MODULE, input through keyboard module, printout module, E2PROM storer and RTC real-time clock are electrically connected with interactive processor respectively.
3. transformer loss proving installation according to claim 1, is characterized in that: described current detection circuit comprises the current transformer and low-pass filter circuit that are electrically connected to each other.
4. transformer loss proving installation according to claim 1, is characterized in that: described supply module comprises battery module and DC-DC isolation module, described human-computer interaction module is that battery module is powered by DC-DC isolation module.
5. transformer loss proving installation according to claim 4, is characterized in that: described battery module is lithium battery power supply module, comprises the battery charger, battery flowmeter charge circle, negative supply change-over circuit and the lithium battery that are electrically connected to each other.
6. transformer loss proving installation according to claim 1, is characterized in that: described three-phase electrical energy computation chip is ADE7880 chip, ADE7880 built-in chip type 7 ADC, digital integrator and reference voltage source circuits.
7. transformer loss proving installation according to claim 2, is characterized in that: described interactive processor is the STC90C514 single-chip microcomputer of band 56K Flash.
8. transformer loss proving installation according to claim 2, is characterized in that: described LCD MODULE is 240*128 lattice lcd.
9. transformer loss proving installation according to claim 2, is characterized in that: described printout module is low-power consumption thermal printer, and interactive processor realizes data interaction by serial communication.
10. transformer loss proving installation according to claim 2, is characterized in that: described E2PROM storer is the AT24C64 of 64K capacity, and RTC real-time clock is PCF8563 chip, and both is all received on interactive processor by I2C bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420789927.3U CN204330894U (en) | 2014-12-15 | 2014-12-15 | A kind of transformer loss proving installation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420789927.3U CN204330894U (en) | 2014-12-15 | 2014-12-15 | A kind of transformer loss proving installation |
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| CN204330894U true CN204330894U (en) | 2015-05-13 |
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| CN201420789927.3U Expired - Fee Related CN204330894U (en) | 2014-12-15 | 2014-12-15 | A kind of transformer loss proving installation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109270360A (en) * | 2018-11-22 | 2019-01-25 | 南京因泰莱电器股份有限公司 | A kind of method of the online line loss of high precision computation |
| CN111766467A (en) * | 2020-07-07 | 2020-10-13 | 深圳市京泉华科技股份有限公司 | Electronic transformer loss detection method and system |
-
2014
- 2014-12-15 CN CN201420789927.3U patent/CN204330894U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109270360A (en) * | 2018-11-22 | 2019-01-25 | 南京因泰莱电器股份有限公司 | A kind of method of the online line loss of high precision computation |
| CN109270360B (en) * | 2018-11-22 | 2020-10-02 | 南京因泰莱电器股份有限公司 | Method for calculating online line loss with high precision |
| CN111766467A (en) * | 2020-07-07 | 2020-10-13 | 深圳市京泉华科技股份有限公司 | Electronic transformer loss detection method and system |
| CN111766467B (en) * | 2020-07-07 | 2022-07-22 | 深圳市京泉华科技股份有限公司 | Electronic transformer loss detection method and system |
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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 |
Granted publication date: 20150513 Termination date: 20171215 |
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| CF01 | Termination of patent right due to non-payment of annual fee |