CN106124875A - A kind of separate switching circuit measured for transformer voltage ratio - Google Patents
A kind of separate switching circuit measured for transformer voltage ratio Download PDFInfo
- Publication number
- CN106124875A CN106124875A CN201610420010.XA CN201610420010A CN106124875A CN 106124875 A CN106124875 A CN 106124875A CN 201610420010 A CN201610420010 A CN 201610420010A CN 106124875 A CN106124875 A CN 106124875A
- Authority
- CN
- China
- Prior art keywords
- voltage
- separate switching
- transformer
- relay matrix
- matrix unit
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/20—Measuring number of turns; Measuring transformation ratio or coupling factor of windings
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Ac-Ac Conversion (AREA)
Abstract
The present invention relates to a kind of separate switching circuit measured for transformer voltage ratio, it is mainly connected by filter resistance R1, filter capacitor C1 ~ C3, variable capacitance YM1, voltage transformer pt, A/D converter, high pressure separate switching relay matrix unit JH, low pressure separate switching relay matrix unit JL, bleeder circuit and transformator T and forms.Present configuration design is simple, rationally, Three-Phase Transformer no-load voltage ratio can be completed measure simultaneously, solve three-phase voltage asymmetry and introduce bigger measurement error, it is ensured that the symmetry of test power supply, no-load voltage ratio accuracy of measurement can be improved and no-load voltage ratio measures work efficiency, be suitable to promote and application.
Description
Technical field
The invention belongs to technical field of electric power detection, be specifically related to a kind of separate switching electricity measured for transformer voltage ratio
Road.
Background technology
When the no-load voltage ratio of power transformer refers to no-load transformer, the ratio of primary side voltage U10 and secondary side voltage U20,
Referred to as no-load voltage ratio.Three-phase transformer no-load voltage ratio is measured, and application three phase mains measures, and general employing line voltage is 380V three-phase electricity
Source, and require that three-phase mains voltage is symmetrical, otherwise produce measurement error.Measure voltage and be not less than measured transformator rated voltage
1%, and keep stable as far as possible, read the voltage indicated value of high and low pressure both sides simultaneously.Carrying out power transformer voltage in recent years
During than test, many employing no-load voltage ratio bridge measurements, its operating process is loaded down with trivial details, and measures narrow scope.
Technical disadvantages at present:
(1) patching operations is loaded down with trivial details, wastes time and energy, and testing efficiency is low；
(2) the artificial high and low pressure magnitude of voltage that reads, introducing random error is the biggest on measurement result impact；
(3) using three-phase 380V power measurement, supply voltage is asymmetric can be increased measurement error and measure narrow scope.
Summary of the invention
For the problems referred to above, it is simple, reasonable that the present invention proposes a kind of structure design, can complete Three-Phase Transformer simultaneously and become
Than measuring, solve three-phase voltage asymmetry and introduce bigger measurement error, it is ensured that the symmetry of test power supply, no-load voltage ratio can be improved
Accuracy of measurement and no-load voltage ratio measure the separate switching circuit measured for transformer voltage ratio of work efficiency.
Technical scheme is as follows:
The above-mentioned separate switching circuit measured for transformer voltage ratio, its mainly by filter resistance R1, filter capacitor C1 ~ C3,
Variable capacitance YM1, voltage transformer pt, A/D converter, high pressure separate switching relay matrix unit JH, the separate switching of low pressure
Relay matrix unit JL, bleeder circuit and transformator T connect composition；Described filter resistance R1 is just being serially connected with single phase poaer supply U
Extremely；Described filter capacitor C1 is parallel to the both positive and negative polarity of single phase poaer supply U, and described filter capacitor C2 is parallel to described A/D converter
Low-voltage signal input and ground connection, described filter capacitor C3 is parallel to described low pressure separate switching relay matrix unit JL's
Voltage output end；Described variable capacitance YM1 is parallel to described filter capacitor C3 two ends；The voltage input of described voltage transformer pt
End is connected respectively the voltage positive-negative input end of described single phase poaer supply U, and the voltage output end of described voltage transformer pt connects
The high-voltage signal input of described A/D converter ground connection；Described high pressure separate switching relay matrix unit JH is by multiple
Relay composes in parallel and is serially connected with the high voltage input terminal of single phase poaer supply U and described transformator T；Described low pressure separate switching relay
Device matrix unit JL is also to be composed in parallel and be serially connected with the low-voltage output of described transformator T and described dividing potential drop by multiple relays
Between circuit；The voltage input end of described bleeder circuit is connected to the voltage of described low pressure separate switching relay matrix unit JL
Outfan, the voltage output end of described bleeder circuit is connected to the low-voltage signal input of described A/D converter.
The described separate switching circuit measured for transformer voltage ratio, wherein: described bleeder circuit be by resistance R2 ~ R5 and
Switch JC1 ~ JC4 connects composition；Described resistance R2 ~ R5 is serially connected and concatermer is parallel to described variable capacitance YM1 two ends；
Described switch JC1 one end is connected to the cathode output end of described low pressure separate switching relay matrix unit JL, and the other end connects
Positive pole low-voltage signal input in described A/D converter；Described switch JC2 one end is connected to the positive pole of described A/D converter
Low-voltage signal input, the other end is connected to the junction point of described resistance R2 and resistance (R3)；Described switch JC3 one end is connected to
The positive pole low-voltage signal input of described A/D converter, the other end is connected to the junction point of described resistance R3 and resistance R4；Described
Switch JC4 one end is connected to the positive pole low-voltage signal input of described A/D converter, and the other end is connected to described resistance R4 and electricity
The junction point of resistance R5.
The described separate switching circuit measured for transformer voltage ratio, wherein: described high pressure separate switching relay matrix
The voltage input end of unit JH is connected respectively the both positive and negative polarity of single phase poaer supply U, described high pressure separate switching relay matrix list
The voltage output end of unit JH is connected to the high voltage input terminal of described transformator T.
The described separate switching circuit measured for transformer voltage ratio, wherein: described low pressure separate switching relay matrix
The voltage input end of unit JL is connected respectively in the voltage input end of described bleeder circuit, described low pressure separate switching relay
The voltage output end of device matrix unit JL connects the low-voltage output of described transformator T.
The described separate switching circuit measured for transformer voltage ratio, wherein: the signal output part of described A/D converter is even
Connect external single-chip microcomputer.
Beneficial effect:
The separate switching circuit structure design that the present invention measures for transformer voltage ratio is simple, reasonable, and application single phase poaer supply measures three
Phase transformer no-load voltage ratio and no-load voltage ratio measurement error, it is ensured that the symmetry of test power supply, gather high pressure, low voltage input signal also simultaneously
Calculate no-load voltage ratio and no-load voltage ratio measurement error, accuracy of measurement can be greatly improved, improve no-load voltage ratio and measure work efficiency；Use single-phase electricity
Source carries out no-load voltage ratio measurement, and three-phase no-load voltage ratio uses same power supply when measuring, and solves three-phase voltage asymmetry and introduces bigger measurement error；
Use separate switching relay matrix automatic sequence that single phase poaer supply is applied to tested Three-Phase Transformer, complete three-phase no-load voltage ratio simultaneously
Measure, easy and simple to handle；High pressure, low pressure input sample signals collecting error are low, are suitable to promote and application.
Accompanying drawing explanation
Fig. 1 is the structure chart that transformer voltage ratio of the present invention measures automatic commutation circuit.
Detailed description of the invention
As it is shown in figure 1, transformer voltage ratio of the present invention measure automatic commutation circuit, be by filter resistance R1, filter capacitor C1 ~
C3, variable capacitance YM1, voltage transformer pt, A/D converter, high pressure separate switching relay matrix unit JH, low pressure is separate cuts
Change relay matrix unit JL, bleeder circuit and transformator T and connect composition.
This filter resistance R1 is serially connected with the positive terminal of single phase poaer supply U.
This filter capacitor C1 is parallel to the both positive and negative polarity of single phase poaer supply U, and this filter capacitor C2 is parallel to the low pressure of A/D converter
Signal input part ground connection, this filter capacitor C3 is parallel to the voltage output end of low pressure separate switching relay matrix unit JL.
This variable capacitance YM1 is parallel to voltage output end or the filter capacitor of low pressure separate switching relay matrix unit JL
C3 two ends.
The voltage input end of this voltage transformer pt is connected respectively the voltage positive-negative input end of single phase poaer supply U, this electricity
The voltage output end of pressure transformer PT connects the high-voltage signal input of A/D converter ground connection wherein, the letter of this A/D converter
Number outfan connects external single-chip microcomputer.
This high pressure separate switching relay matrix unit JH is to be composed in parallel by multiple relays, and it is serially connected with single phase poaer supply
The high voltage input terminal of U and transformator T, i.e. the voltage input end of high pressure separate switching relay matrix unit JH is connected respectively
The both positive and negative polarity of single phase poaer supply U, the voltage output end of high pressure separate switching relay matrix unit JH is connected to the high pressure of transformator T
Input.
This low pressure separate switching relay matrix unit JL is also to be composed in parallel by multiple relays, and it is serially connected with transformator
Between low-voltage output and the bleeder circuit of T；Wherein, the voltage input end of this low pressure separate switching relay matrix unit JL divides
Not being correspondingly connected to the voltage input end of bleeder circuit, the voltage output end of this low pressure separate switching relay matrix unit JL is even
Connect the low-voltage output of transformator T.
The voltage input end of this bleeder circuit is connected to the voltage output end of low pressure separate switching relay matrix unit JL,
The voltage output end of this bleeder circuit is connected to the low-voltage signal input of A/D converter；Wherein, this bleeder circuit is by resistance
R2 ~ R5 and switch JC1 ~ JC4 connects composition, and specifically this resistance R2 ~ R5 is serially connected and concatermer is parallel to variable capacitance
YM1 two ends；This switch JC1 one end is connected to the cathode output end of low pressure separate switching relay matrix unit JL, and the other end is even
It is connected to the positive pole low-voltage signal input of A/D converter；This switch JC2 one end is connected to the positive pole low-voltage signal of A/D converter
Input, the other end is connected to the junction point of resistance R2 and R3；This switch JC3 one end is connected to the positive pole low pressure of A/D converter
Signal input part, the other end is connected to the junction point of resistance R3 and R4；This switch JC4 one end is connected to the positive pole of A/D converter
Low-voltage signal input, the other end is connected to the junction point of resistance R4 and R5.
The present invention uses single phase poaer supply U to be filtered by filter resistance R1, filter capacitor C1, and high input voltage signal passes through
The high input voltage voltage sampling signal of voltage transformer pt isolation enters simultaneously through high pressure separate switching relay matrix unit JH
Being applied to tested transformator T high pressure winding, tested transformator T low-pressure side feedback low pressure measurement signal is through low pressure separate switching relay
Device matrix unit JL, filter capacitor C3 filter, and through bleeder circuit dividing potential drop, then filter capacitor C2 filtering output low pressure input voltage is adopted
Sample signal enters A/D converter.
Meanwhile, the present invention can use Single-chip Controlling high pressure separate switching relay matrix unit JH and the separate switching of low pressure
Relay matrix unit JL synchronism switching is identical separate, and a phase is measured rear A/D converter by high pressure, low pressure input sample
Signal sends back single-chip microcomputer, and single-chip microcomputer completes to calculate no-load voltage ratio and no-load voltage ratio measurement error is simultaneously emitted by switching command and automatically carries out next
Phase no-load voltage ratio is measured, and order completes three-phase no-load voltage ratio and the measurement of no-load voltage ratio measurement error and calculating.
Present configuration design is simple, reasonable, can complete Three-Phase Transformer no-load voltage ratio simultaneously and measure, solve three-phase voltage not
The bigger measurement error of symmetrical introducing, it is ensured that the symmetry of test power supply, can improve no-load voltage ratio accuracy of measurement and no-load voltage ratio measures work
Make efficiency, be suitable to promote and application.
Claims (5)
1. one kind for transformer voltage ratio measure separate switching circuit, it is characterised in that: described separate switching circuit mainly by
Filter resistance (R1), filter capacitor (C1 ~ C3), variable capacitance (YM1), voltage transformer (PT), A/D converter, high pressure are separate
Switching relay matrix unit (JH), low pressure separate switching relay matrix unit (JL), bleeder circuit and transformator (T) connect
Composition；
Described filter resistance (R1) is serially connected with the positive terminal of single phase poaer supply (U)；
Described filter capacitor (C1) is parallel to the both positive and negative polarity of single phase poaer supply (U), and described filter capacitor (C2) is parallel to described A/D and turns
The low-voltage signal input of parallel operation ground connection, described filter capacitor (C3) is parallel to described low pressure separate switching relay matrix list
The voltage output end of unit (JL)；
Described variable capacitance (YM1) is parallel to described filter capacitor (C3) two ends；
The voltage input end of described voltage transformer (PT) is connected respectively the positive negative input of voltage of described single phase poaer supply (U)
End, the voltage output end of described voltage transformer (PT) connects high-voltage signal input the ground connection of described A/D converter；
Described high pressure separate switching relay matrix unit (JH) is to be composed in parallel by multiple relays and be serially connected with single phase poaer supply
(U) with the high voltage input terminal of described transformator (T)；
Described low pressure separate switching relay matrix unit (JL) is also to be composed in parallel and be serially connected with described change by multiple relays
Between low-voltage output and the described bleeder circuit of depressor (T)；
The voltage that the voltage input end of described bleeder circuit is connected to described low pressure separate switching relay matrix unit (JL) is defeated
Going out end, the voltage output end of described bleeder circuit is connected to the low-voltage signal input of described A/D converter.
2. the separate switching circuit measured for transformer voltage ratio as claimed in claim 1, it is characterised in that: described dividing potential drop electricity
Road is connected by resistance (R2 ~ R5) and switch (JC1 ~ JC4) and forms；
Described resistance (R2 ~ R5) is serially connected and concatermer is parallel to described variable capacitance (YM1) two ends；
Described switch (JC1) one end is connected to the cathode output end of described low pressure separate switching relay matrix unit (JL), separately
One end is connected to the positive pole low-voltage signal input of described A/D converter；
Described switch (JC2) one end is connected to the positive pole low-voltage signal input of described A/D converter, and the other end is connected to described
Resistance (R2) and the junction point of resistance (R3)；
Described switch (JC3) one end is connected to the positive pole low-voltage signal input of described A/D converter, and the other end is connected to described
Resistance (R3) and the junction point of resistance (R4)；
Described switch (JC4) one end is connected to the positive pole low-voltage signal input of described A/D converter, and the other end is connected to described
Resistance (R4) and the junction point of resistance (R5).
3. the separate switching circuit measured for transformer voltage ratio as claimed in claim 1, it is characterised in that: described high pressure phase
The voltage input end of relay matrix unit (JH) both positive and negative polarity of single phase poaer supply (U), described high pressure Qie Huan be connected respectively
The voltage output end of separate switching relay matrix unit (JH) is connected to the high voltage input terminal of described transformator (T).
4. the separate switching circuit measured for transformer voltage ratio as claimed in claim 1, it is characterised in that: described low pressure phase
Qie Huan the voltage input end of relay matrix unit (JL) not be connected respectively in the voltage input end of described bleeder circuit, institute
The voltage output end stating low pressure separate switching relay matrix unit (JL) connects the low-voltage output of described transformator (T).
5. the separate switching circuit measured for transformer voltage ratio as claimed in claim 1, it is characterised in that: described A/D turns
The signal output part of parallel operation connects external single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610420010.XA CN106124875A (en) | 2016-06-13 | 2016-06-13 | A kind of separate switching circuit measured for transformer voltage ratio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610420010.XA CN106124875A (en) | 2016-06-13 | 2016-06-13 | A kind of separate switching circuit measured for transformer voltage ratio |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106124875A true CN106124875A (en) | 2016-11-16 |
Family
ID=57270062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610420010.XA Pending CN106124875A (en) | 2016-06-13 | 2016-06-13 | A kind of separate switching circuit measured for transformer voltage ratio |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106124875A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107356828A (en) * | 2017-06-16 | 2017-11-17 | 国家电网公司 | Transformer voltage ratio simulation and training device |
| CN108732430A (en) * | 2018-05-23 | 2018-11-02 | 安徽省神虹变压器股份有限公司 | A kind of twin voltage detection method of transformer cartridge type umber of turn |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1419134A (en) * | 2002-12-12 | 2003-05-21 | 武汉国测科技股份有限公司 | Single phase power source measuring method and device for 2 type transformer rate |
| WO2003054561A1 (en) * | 2001-12-20 | 2003-07-03 | Abb Inc. | Automated test sequence editor and engine for transformer testing |
| CN101162245A (en) * | 2007-11-26 | 2008-04-16 | 天津理工大学 | Transformer regulation measuring systems based on virtual instrument |
| CN201344956Y (en) * | 2008-12-26 | 2009-11-11 | 保定金迪科学仪器有限公司 | Variable ratio test instrument with high-low voltage reverse connection protecting function |
| CN202025043U (en) * | 2010-11-10 | 2011-11-02 | 山东电力集团公司聊城供电公司 | Improved transformation ratio tester |
| CN204649852U (en) * | 2015-05-09 | 2015-09-16 | 扬州华电电气有限公司 | A kind of improved automatic Multifunctional transformation ratio test device |
-
2016
- 2016-06-13 CN CN201610420010.XA patent/CN106124875A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003054561A1 (en) * | 2001-12-20 | 2003-07-03 | Abb Inc. | Automated test sequence editor and engine for transformer testing |
| CN1419134A (en) * | 2002-12-12 | 2003-05-21 | 武汉国测科技股份有限公司 | Single phase power source measuring method and device for 2 type transformer rate |
| CN101162245A (en) * | 2007-11-26 | 2008-04-16 | 天津理工大学 | Transformer regulation measuring systems based on virtual instrument |
| CN201344956Y (en) * | 2008-12-26 | 2009-11-11 | 保定金迪科学仪器有限公司 | Variable ratio test instrument with high-low voltage reverse connection protecting function |
| CN202025043U (en) * | 2010-11-10 | 2011-11-02 | 山东电力集团公司聊城供电公司 | Improved transformation ratio tester |
| CN204649852U (en) * | 2015-05-09 | 2015-09-16 | 扬州华电电气有限公司 | A kind of improved automatic Multifunctional transformation ratio test device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107356828A (en) * | 2017-06-16 | 2017-11-17 | 国家电网公司 | Transformer voltage ratio simulation and training device |
| CN107356828B (en) * | 2017-06-16 | 2023-10-27 | 国家电网公司 | Transformer transformation ratio simulation training device |
| CN108732430A (en) * | 2018-05-23 | 2018-11-02 | 安徽省神虹变压器股份有限公司 | A kind of twin voltage detection method of transformer cartridge type umber of turn |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106471699B (en) | A kind of the dynamic equalization circuit and its method for dynamically balancing of battery management system | |
| CN2901330Y (en) | AC/DC withstand voltage insulation detector with high precision and high speed detecting and control circuit | |
| CN105182126B (en) | Improved distribution transformer energy efficiency metering detection method | |
| CN204228843U (en) | A kind of AC network simulator topological structure | |
| CN109596923A (en) | Frequency converter bus capacitor on-line measuring device, method and frequency converter | |
| CN108957380B (en) | Development of transformation ratio and polarity test instrument of capacitor voltage transformer | |
| CN110828101A (en) | Power transformer demagnetization and remanence measurement device | |
| CN106124875A (en) | A kind of separate switching circuit measured for transformer voltage ratio | |
| CN102830266B (en) | Phase discriminating circuit of residual current phase | |
| CN201667646U (en) | Long-time low-zero drift digital integrator based on field programmable gate array | |
| CN106383264B (en) | Anti-interference high-precision zero passage detection method | |
| CN203133226U (en) | Polarity testing instrument for current transformer | |
| CN103312188B (en) | For power supply and the method for testing thereof of reactor performance test in power electronic equipment | |
| CN202649455U (en) | Embedded accuracy tester for current transformer | |
| CN202563014U (en) | Transformer loss measurement control console | |
| CN107966657A (en) | Relay checking instrument free of demolition and method of calibration based on arm chips | |
| CN205157757U (en) | Standard current transformer secondary load improves device | |
| CN204287447U (en) | A kind of alternating current-direct current input detecting circuit | |
| CN102749523A (en) | Direct-current ground resistance detection circuit applied to photovoltaic inverter system | |
| CN103105580B (en) | A kind of temperature relay life-span tester | |
| CN206235684U (en) | A kind of charger automatic test instrument | |
| CN204832485U (en) | A frequency conversion electron source for 750kV level CVT on -site proving system | |
| CN203561676U (en) | Leakage current tester | |
| CN203949980U (en) | The charged detector of capacitance type potential transformer | |
| CN205581185U (en) | DC -AC converter measuring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161116 |
|
| WD01 | Invention patent application deemed withdrawn after publication |