CN106324407A - Voltage transformer's second harmonic elimination device detector - Google Patents
Voltage transformer's second harmonic elimination device detector Download PDFInfo
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- CN106324407A CN106324407A CN201610861638.3A CN201610861638A CN106324407A CN 106324407 A CN106324407 A CN 106324407A CN 201610861638 A CN201610861638 A CN 201610861638A CN 106324407 A CN106324407 A CN 106324407A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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- General Physics & Mathematics (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a voltage transformer's second harmonic elimination device detector, which comprises seven units: a panel and storage unit, a power control unit, a digital processor unit, a harmonic wave generation unit, an output switching interface, a detection unit and a protection unit. The panel and the storage unit comprises a host computer processor unit, a USB interface, a data storage (unit), a display screen and a keyboard. The harmonic wave generation unit comprises a D/A conversion and amplification module, a power amplifier bus voltage unit, a fundamental wave power amplification module and a harmonic wave power amplification module. According to the invention, it is possible to accurately, rapidly and safely simulate the faults of resonance, grounding and over-voltage of a power grid of 35kV or below, and to quickly check the functions of harmonic elimination, grounding and over-voltage warning of a PT secondary harmonic elimination device, therefore, effectively solving the problem of a traditional method that a detector is easily damaged, safety hazards are caused and the detection process is difficult.
Description
Technical field
One voltage transformer secondary harmonic elimination apparatus detector of the present invention, belongs to secondary equipment in power system detection field.
Background technology
At present, PT(voltage transformer) secondary resonance elimination device as one of big harmonic elimination nucleus equipment of rural power grids transformer station two, its
Good military service performance is to ensure that rural power grids transformer station power supply quality and stability essential condition.But it is no lack of in the transformer station that puts into operation and has
PT secondary resonance elimination device damages the accident caused.Such as December in 2015 27 days, xx transformer station 10kV#4 bus PT burnt, through investigation
When finding PT resonance, resonance potential is not up to a resonance eliminator initiation value, and secondary resonance elimination device damages already and cannot eliminate electrical network
Resonance.The functional check of PT secondary resonance elimination device at present all uses the conventional test methodologies of relay-protection tester dosage, and it is deposited
Excessive at test transient resonance electric current, fragile relay-protection tester, in some instances it may even be possible to affect personal security.Therefore, tradition inspection
Test the method for inspection and there is the problems such as fragile tester, potential safety hazard, test difficulty.
Summary of the invention
For solving above-mentioned technical problem, the present invention provides a kind of high accuracy, quick, safe voltage transformer secondary harmonic elimination
Device detector, it can be simulated the fault such as 35kV and following electrical network generation resonance, ground connection, overvoltage, quickly check PT bis-
The harmonic elimination of secondary harmonic elimination apparatus and the function such as ground connection, overvoltage alarm, it is ensured that the reliable and stable operation of PT secondary resonance elimination device.Effectively
Solve traditional method and there is the problems such as fragile tester, potential safety hazard, test difficulty.
The technical scheme that the present invention takes is；
Voltage transformer secondary harmonic elimination apparatus detector, including panel and storage element, control power subsystem, digital processing unit list
Unit, harmonics generation unit, output switching and interface, detector unit, protected location.Described panel and storage element include host computer
Processor unit, USB interface, data storage, display screen, keyboard.Host computer processor unit connects USB interface, number respectively
According to memorizer, display screen, keyboard.Control power subsystem and connect host computer processor unit, digital processor unit respectively.Described
Digital processor unit connects host computer processor unit, detector unit, protected location respectively, and digital processor unit receives this
The signal of a little unit, after completing signal processing, changes to host computer processor unit and D/A and amplifying unit sends information.
Described harmonics generation unit includes D/A conversion and amplification module, power amplifier busbar voltage unit, fundamental power amplification mould
Block, harmonic power amplification module；D/A conversion and amplification module connect digital processor unit and fundamental power amplification module, humorous
Wave power amplification module completes the D/A conversion of harmonic wave and amplifies, and power amplifier busbar voltage unit is respectively to fundamental power amplification module
Signal is sent with harmonic power amplification module；Fundamental power amplification module receives D/A conversion and the signal of amplification module, and to defeated
Go out switching and interface sends signal；Harmonic power amplification module receives D/A conversion and the signal of amplification module, and to output switching
And interface sends signal.
Described output switching and interface linker wave power amplification module, harmonic power amplification module, output switching respectively
And interface fundamental power amplification module and harmonic power amplification module instruct, and provide anti-to detector unit, protected location
Feedback signal, provides tested number to PT secondary resonance elimination device simultaneously.
Described detector unit connects output switching and interface, the voltage electricity that detector unit detection output switching and interface send
Stream change detection signal, and send instruction to digital processor unit.
Described protected location connects output switching and interface, the protection letter that protected location accepts output switching and interface sends
Number, and send instruction to digital processor unit.
Host computer processor unit connects USB interface, and USB interface is for the copy of test data；
Host computer processor unit connects data storage, and data storage is for the real-time storage of test data；
Host computer processor unit connects display screen, and display screen shows voltage condition, frequency size, result of the test in real time；
Host computer processor unit connects keyboard, and experimental condition is edited by keyboard.
One voltage transformer secondary harmonic elimination apparatus detector of the present invention, compared with the prior art, has significant advantage
With good effect:
1, tester and PT secondary resonance elimination device can be protected by protected location of the present invention accurately, it is to avoid during routine test
PT secondary resonance elimination device, when resonance moment produces big electric current, burns tester and PT secondary resonance elimination device because crossing stream；
2, first-harmonic output voltage of the present invention be 0-200V, electric current be 0-2A, harmonic wave voltage is 0-50V, electric current is 0-16A,
Use first-harmonic to occur the harmonious ripple of part to occur part to automatically switch, can optimizing check fundamental frequency, frequency dividing and frequency multiplication the most corresponding different
During operation voltage, the optimization of required harmonics generation unit power.
3, the present invention fast automatic can verify secondary resonance elimination device action situation in 1s, automatically judges secondary harmonic elimination
Apparatus function is the most correct.
4, apparent size of the present invention is little, light weight, operation are intelligent, facilitates individual soldier to carry maintenance.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Detailed description of the invention
Below by describing the present invention in detail, in conjunction with accompanying drawing 1, to technical scheme, it is further described.
It should be noted that, its harmonic elimination principle of the PT secondary resonance elimination device 9 of certain model cited in following embodiment meets instantly
The requirement of power system PT secondary resonance elimination device, universality is stronger.
Different types of PT secondary resonance elimination device, it all uses and judges the size of 3U0 under different frequency.Its harmonic elimination apparatus is former
Manage as follows:
Resonance criterion: 17HZ harmonic voltage >=17V, 25HZ harmonic voltage >=25V, 150HZ harmonic voltage >=33V；
Ground connection criterion: fundamental voltage >=30V；
Overvoltage criterion: fundamental voltage >=120V.
As it is shown in figure 1, voltage transformer secondary harmonic elimination apparatus detector, including tester housing 1, panel and storage element
2, power subsystem 3, digital processor unit 4, harmonics generation unit 5, output switching and interface 6, detector unit 7, protection are controlled
Unit 8,
Described panel and storage element 2 include host computer processor unit 21, USB interface 22, data storage 23, display screen
24, keyboard 25.
Host computer processor unit 21 connects USB interface 22, data storage 23, display screen 24, keyboard 25 respectively.
Control power subsystem 3 and connect host computer processor unit 21, digital processor unit 4 respectively.
Described digital processor unit 4 connects host computer processor unit 21, detector unit 7, protected location 8 respectively, number
WP unit 4 receives the signal of these unit, after completing signal processing, changes to host computer processor unit 21 and D/A
And amplifying unit 51 sends information.
Described harmonics generation unit 5 includes D/A conversion and amplification module 51, power amplifier busbar voltage unit 52, fundamental power
Amplification module 53, harmonic power amplification module 54；D/A conversion and amplification module 51 connect digital processor unit 4 and first-harmonic merit
Rate amplification module 53, harmonic power amplification module 54 completes the D/A conversion of harmonic wave and amplifies, and power amplifier busbar voltage unit 52 is respectively
Signal is sent to fundamental power amplification module 53 and harmonic power amplification module 54；Fundamental power amplification module 53 receives D/A and turns
Change and the signal of amplification module 51, and send signal to output switching and interface 6；Harmonic power amplification module 54 receives D/A and turns
Change and the signal of amplification module 51, and send signal to output switching and interface 6.
Described output switching and interface 6 linker wave power amplification module 53 respectively, harmonic power amplification module 54, output
Switch and interface 6 receives fundamental power amplification module 53 and harmonic power amplification module 54 instructs, and to detector unit 7, protection
Unit 8 provides feedback signal, provides tested number to PT secondary resonance elimination device 9 simultaneously.
Described detector unit 7 connects output switching and interface 6, the electricity that detector unit 7 detects output switching and interface 6 sends
Current voltage change detection signal, and send instruction to digital processor unit 4.
Described protected location 8 connects output switching and interface 6, the guarantor that protected location 8 accepts output switching and interface 6 sends
Protect signal, and send instruction to digital processor unit 4.
Host computer processor unit 21 connects USB interface 22, and USB interface 22 is for the copy of test data.
Host computer processor unit 21 connects data storage 23, and data storage 23 is deposited in real time for test data
Storage.
Host computer processor unit 21 connects display screen 24, display screen 24 for show in real time voltage condition, frequency size,
Result of the test.
Host computer processor unit 21 connects keyboard 25, and experimental condition is edited by keyboard 25.
Wherein:
Described host computer processor unit 21 includes that microprocessor STM32F103VET6, microprocessor STM32F103VET6 connect
Communication chip MAX3221CDBR, USB chip CH376S.
Described data storage 23 includes: memory cell SST39VF6401-70-4I-EK, technotron
IS62C256AL-45UL and three-terminal voltage-stabilizing chip NCP1117DT33RKG.
Described display screen 24 uses QPY6448-056-NN09L, display screen 24 to connect control chip RA8835AP3N sum
According to processing chip MAX3221CDBR.
Described control power subsystem 3 is by type of voltage step-up/down converter TPS63020DJSR, DC-to-DC converter NCV3163PW
Connect and compose.
Described digital processor unit 4 is by dsp processor TMS320F2808PZA, integrated circuit XC9572TQ100AMM-
10C and integrated circuit TCM809RENB713 is constituted.
Described D/A conversion and amplification module 51 are made up of DAC7644E and comparator chip OP07C.
Power amplifier busbar voltage unit 52 is by rectifier bridge GBJ2510, rectifier bridge stack KBP310, KBU810 and voltage stabilizing chip
LM317 is constituted.
Fundamental power amplification module 53 is by power field effect pipe IRFP460, op-amp OPA277, amplifier chip
INA132 is constituted.
Harmonic power amplification module 54 is made up of IXTQ36N50P, audion J5027 and A1156 chip；
Output switching and interface 6 are made up of microprocessor AT89C2051, ULN2003AG4 and relay 951-2C-24D chip.
Detector unit 7 is made up of LM393P, comparator chip OP07C and optocoupler TLP181.
Protected location 8 is made up of audion 2N5551 and CMOS chip 74HC32.
Enforcement step:
On panel and the storage element 2 of this invention device, by keyboard 25 by the initial magnitude of required generation voltage 3U0, cut
Stopping the parameters such as amplitude, amplitude variable quantity, frequency size to be configured, display, at display screen 24, is stored in data storage 23, and
It is converted into digital data transmission to digital processor unit 4 by host computer processor unit 21.Described digital processor unit 4
This signal is identified, the digital processing such as superposition and conversion, be transferred to harmonics generation unit 5.Described harmonics generation unit 5
Digital signal is converted into analogue signal by D/A conversion and amplification module 51, and carries out the preliminary amplification of signal；Pass through fundamental power
Amplification module 53 carries out power amplification, harmonic power amplification module 54 can also be used this input the fundamental signal of this input
Harmonic signal carry out power amplification, and the power supply of output is to meet different frequency to use power amplifier busbar voltage unit 52 to guarantee
Steady voltage source；
Output switching and the selection relay of interface 6, by the steady voltage source of this different frequency by carrying out fundamental frequency, frequency dividing
With the voltage switching of frequency multiplication, the voltage after switching acts on PT secondary resonance elimination device 9.When reaching PT secondary resonance elimination device 9
After resonance, ground connection, overvoltage function criterion, PT secondary resonance elimination device 9 harmonic elimination element movement, bigger instantaneous short-circuit electricity will be produced
Stream, PT secondary resonance elimination device 9 both end voltage also will change simultaneously.
Detector unit 7 is by the voltage change ratio at detection output switching and interface 6 and the signal of current changing rate, and will believe
Number passing to digital processor unit 4, digital processor unit 4, by after signal processing, on the one hand passes to harmonics generation unit 5
Stop harmonic wave occurring, on the other hand, voltage change signal and the result of collection are passed to panel and carry out with storage element 2
Display and storage.
Protected location 8, after PT secondary resonance elimination device 9 harmonic elimination element movement, quickly accesses big resistance, eliminates instantaneous short-circuit
The impact of electric current, it is to avoid burn tester and PT secondary resonance elimination device 9.
Described panel and the USB interface 22 in storage element 2, use USB3.0 interface, for the copy of test data.
Claims (3)
1. voltage transformer secondary harmonic elimination apparatus detector, including panel and storage element (2), control power subsystem (3), numeral
Processor unit (4), harmonics generation unit (5), output switching and interface (6), detector unit (7), protected location (8), it is special
Levy and be: described panel and storage element (2) include host computer processor unit (21), USB interface (22), data storage
(23), display screen (24), keyboard (25)；Host computer processor unit (21) connects USB interface (22), data storage respectively
(23), display screen (24), keyboard (25)；Control power subsystem (3) and connect host computer processor unit (21), digital processing respectively
Device unit (4)；Described digital processor unit (4) connects host computer processor unit (21), detector unit (7), protection respectively
Unit (8), digital processor unit (4) receives the signal of these unit, after completing signal processing, to host computer processor unit
(21) and D/A conversion and amplifying unit (51) send information；Described harmonics generation unit (5) includes D/A conversion and amplification module
(51), power amplifier busbar voltage unit (52), fundamental power amplification module (53), harmonic power amplification module (54)；D/A conversion and
Amplification module (51) connects digital processor unit (4) and fundamental power amplification module (53), harmonic power amplification module (54)
Completing the D/A conversion of harmonic wave and amplify, power amplifier busbar voltage unit (52) is respectively to fundamental power amplification module (53) and harmonic wave
Power amplifier module (54) sends signal；Fundamental power amplification module (53) receives D/A conversion and the signal of amplification module (51),
And send signal to output switching and interface (6)；Harmonic power amplification module (54) receives D/A conversion and amplification module (51)
Signal, and send signal to output switching and interface (6)；Described output switching and interface (6) linker wave power respectively amplifies
Module (53), harmonic power amplification module (54), output switching and interface (6) receive fundamental power amplification module (53) and harmonic wave
Power amplifier module (54) instructs, and provides feedback signal to detector unit (7), protected location (8), simultaneously to bis-harmonic eliminations of PT
Device (9) provides tested number；Described detector unit (7) connects output switching and interface (6), detector unit (7) detection outputting cutting
Change and voltage x current change detection signal that interface (6) sends, and send instruction to digital processor unit (4)；Described protection
Unit (8) connects output switching and interface (6), the protection signal that protected location (8) accepts output switching and interface (6) sends,
And send instruction to digital processor unit (4).
Voltage transformer secondary harmonic elimination apparatus detector the most according to claim 1, it is characterised in that: host computer processor list
Unit (21) connects USB interface (22), and USB interface (22) is for the copy of test data；Host computer processor unit (21) connects
Data storage (23), data storage (23) is for the real-time storage of test data；Host computer processor unit (21) connects
Display screen (24), display screen (24) shows voltage condition, frequency size, result of the test in real time；Host computer processor unit
(21) connecting keyboard (25), experimental condition is edited by keyboard (25).
3. use the secondary resonance elimination device detection method of detector as claimed in claim 1 or 2, it is characterised in that: at device
On panel and storage element (2), by keyboard (25) by the initial magnitude of required generation voltage, cut-off amplitude, amplitude variable quantity,
The parameters such as frequency size are configured, and display, in display screen (24), is stored in data storage (23), and is processed by host computer
Device unit (21) is converted into digital data transmission to digital processor unit (4), and described digital processor unit (4) is to this signal
Be identified, the digital processing such as superposition and conversion, be transferred to harmonics generation unit (5)；The D/A of described harmonics generation unit (5)
Digital signal is converted into analogue signal by conversion and amplification module (51), and carries out the preliminary amplification of signal；Pass through fundamental power
Amplification module (53) carries out power amplification, harmonic power amplification module (54) can also be used this fundamental signal of this input
The harmonic signal of input carries out power amplification, and the power supply of output is for meeting difference to use power amplifier busbar voltage unit (52) to guarantee
The steady voltage source of frequency；Output switching and the selection relay of interface (6), lead to the steady voltage source of this different frequency
Crossing the voltage switching carrying out fundamental frequency, frequency dividing and frequency multiplication, the voltage after switching acts on PT secondary resonance elimination device (9)；When reaching
After the resonance of PT secondary resonance elimination device (9), ground connection, overvoltage function criterion, PT secondary resonance elimination device (9) harmonic elimination element movement, will
Producing bigger transient short-circuit current, PT secondary resonance elimination device (9) both end voltage also will change simultaneously；Detector unit (7)
Output switching and the voltage change ratio at interface (6) place and the signal of current changing rate will be detected, and signal will be passed at numeral
Reason device unit (4), digital processor unit (4), by after signal processing, on the one hand passes to harmonics generation unit (5) and stops harmonic wave
Occur, on the other hand, the voltage change signal of collection and result are passed to panel and storage element (2) carry out display and
Store；Protected location (8), after PT secondary resonance elimination device (9) harmonic elimination element movement, quickly accesses big resistance, eliminates instantaneous short-circuit
The impact of electric current, it is to avoid burn tester and PT secondary resonance elimination device (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610861638.3A CN106324407B (en) | 2016-09-28 | 2016-09-28 | Detector for secondary resonance elimination device of voltage transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610861638.3A CN106324407B (en) | 2016-09-28 | 2016-09-28 | Detector for secondary resonance elimination device of voltage transformer |
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| Publication Number | Publication Date |
|---|---|
| CN106324407A true CN106324407A (en) | 2017-01-11 |
| CN106324407B CN106324407B (en) | 2023-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610861638.3A Active CN106324407B (en) | 2016-09-28 | 2016-09-28 | Detector for secondary resonance elimination device of voltage transformer |
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Cited By (2)
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| CN108614174A (en) * | 2018-06-11 | 2018-10-02 | 国网湖北省电力有限公司孝感供电公司 | The tester and test system of secondary resonance elimination device |
| CN110895297A (en) * | 2019-12-08 | 2020-03-20 | 国网河南省电力公司洛阳供电公司 | Performance detection device for voltage transformer resonance elimination device |
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| CN106324407B (en) | 2023-07-25 |
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