CN110261683A - A kind of Assembled high-voltage shunted capacitor set detecting device - Google Patents
A kind of Assembled high-voltage shunted capacitor set detecting device Download PDFInfo
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- CN110261683A CN110261683A CN201810938483.8A CN201810938483A CN110261683A CN 110261683 A CN110261683 A CN 110261683A CN 201810938483 A CN201810938483 A CN 201810938483A CN 110261683 A CN110261683 A CN 110261683A
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- 239000003990 capacitor Substances 0.000 title claims abstract description 37
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 230000005611 electricity Effects 0.000 claims description 5
- 238000001514 detection method Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2605—Measuring capacitance
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention discloses a kind of Assembled high-voltage shunted capacitor set detecting device, including power circuit, relay switching circuit, D/A conversion circuit, control chips, digital power amplifier circuit, display device；Relay switching circuit and capacitor group to be detected connect, and capacitor group relay switching circuit and to be detected connects；The output end of D/A conversion circuit is connected with the input terminal of digital power amplifier, the output end and relay switching circuit input terminal of digital power amplifier circuit connect, sample circuit is connected between digital power amplifier circuit output end and relay switching circuit input terminal, the voltage signal inputs of sample circuit are connected with the voltage signal output end of relay switching circuit, the output end and control chip of sample circuit connect, the input terminal of control chip is also connected with keyboard, and the output end and display device for controlling chip connect.The present invention can effectively solve the problem that the existing capacitor set detecting device scope of application is small, and function is few, the big problem of operation difficulty.
Description
Technical field
The present invention relates to a kind of Assembled high-voltage shunted capacitor set detecting devices.
Background technique
Currently, reactive power compensator largely puts into operation of power networks, reactive power compensator inevitably will frequency in operation
It is numerous throw, cut capacitor group with meet automatically track, the requirement of real-time compensation.The frequent switching of reactive-load compensation capacitor group can generate
Overcurrent and overvoltage impact, cause capacitor to damage.For early detection capacitor defect, failure propagation is avoided, therefore want
Periodic detection capacity of capacitor bank.Domestic conventional capacitor and inductor tester can only carry out electricity for open capacitor group at present
The measurement for holding inductance there are no the method for the capacitance for measuring novel totally-enclosed Assembled high-voltage shunted capacitor group and is set
It is standby.Even if producing the producer of this equipment, can not also it be measured after capacitor package, foreign data, which also rarely has, to be referred to.
Currently, conventional capacitor and inductor tester can only carry out the measurement of capacitor and inductor for open capacitor group.And
The capacitor and reactor for the Assembled high-voltage shunted capacitor device that present some substations put into operation be not an exposure to it is outer, and
Totally-enclosed in the shell of an oil immersion, outside can only touch three high-voltage piles there are also and capacitor parallel connection mutual induction of voltage
Device secondary side, is unable to measure using existing equipment.
Summary of the invention
The object of the present invention is to provide a kind of Assembled high-voltage shunted capacitor set detecting devices, solve existing capacitor group
The detection device scope of application is small, and function is few, the big problem of operation difficulty.
The technical solution adopted by the present invention to solve the technical problems is: a kind of Assembled high-voltage shunted capacitor group detection
Device, including power circuit be connected with power circuit output end relay switching circuit, D/A conversion circuit, control chip,
Digital power amplifier circuit, display device；The current input terminal of the current output terminal of relay switching circuit and capacitor group to be detected
Connect, the voltage output end of the voltage input end of relay switching circuit and capacitor group to be detected connects；D/A conversion circuit
Output end is connected with the input terminal of digital power amplifier, the output end and relay switching circuit input terminal phase of digital power amplifier circuit
It connects, sample circuit, the voltage of sample circuit is connected between digital power amplifier circuit output end and relay switching circuit input terminal
Signal input part is connected with the voltage signal output end of relay switching circuit, the output end and control chip phase of sample circuit
It connects, the input terminal for controlling chip is also connected with keyboard, and the output end and display device for controlling chip connect.
Beneficial effects of the present invention: this Assembled high-voltage shunted capacitor set detecting device can only pass through three high pilings
The wiring of head is that can measure the capacitance of each phase capacitor, while can also measure the inductance of each phase reactor, the instrument wiring
Convenient, easy to operate, capacitance is non-detectable after solving the problems, such as the installation of Assembled high-voltage shunted capacitor group, is power grid
Normal operation provides safety guarantee, can reliably and accurately measure each phase capacitance, judge in time capacitor due to
Longtime running and frequent switching and caused by capacitance decline or three-phase electricity capacity unbalance, to avoid due to compensating electric capacity
Power supply trouble caused by the damage of device group.
Below with reference to drawings and examples, the present invention is described in detail.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of analog sampling circuit.
Fig. 2 is output and input signal conversion circuit.
Fig. 3 is signal generation and power amplifier.
Fig. 4 is host CPU and keyboard-display circuit.
Specific embodiment
Embodiment, a kind of Assembled high-voltage shunted capacitor set detecting device as shown in Figure 1, including power circuit, and electricity
The connected relay switching circuit of source circuit output end, D/A conversion circuit, control chip, digital power amplifier circuit, display device；
The current output terminal of relay switching circuit and the current input terminal of capacitor group to be detected connect, the electricity of relay switching circuit
Pressure input terminal and the voltage output end of capacitor group to be detected connect；The output end of D/A conversion circuit and digital power amplifier
Input terminal is connected, and the output end and relay switching circuit input terminal of digital power amplifier circuit connect, digital power amplifier circuit output end
Sample circuit, voltage signal inputs and the relay switching of sample circuit are connected between relay switching circuit input terminal
The voltage signal output end of circuit is connected, and the output end and control chip of sample circuit connect, and the input terminal for controlling chip also connects
It is connected to keyboard, the output end and display device for controlling chip connect.
Power circuit provides stable low ripple DC power supply for complete machine, and effectively by analog power and digital power point
It opens.Control unit issues the sinusoidal signal of three kinds of different frequencies by single-chip microcontroller DA, after the filtering of Jing Bajie Butterworth filter
It send to digital power amplifier circuit.Received sinusoidal signal is carried out power amplification by digital power amplifier chip by digital power amplifier circuit, is adopted
Made to export constant pressure with voltage feedback system.Sample circuit by test item both end voltage and is flowed through using 24 potential difference point AD conversion modules
The electric current of test item carries out real-time constant duration sampling, and sampled result is sent to computing unit.Control chip is responsible for AD
Sampled data handle and calculate final result according to calculation formula being sent to liquid crystal display.Man-machine interface, which is shown, passes through keyboard
Key information is received to implement corresponding control function and show measurement result.
Measurement process: test item is had a power failure；By being grounded test item high-voltage end reliable ground；Remove test item high pressure
Cable, by instrument ground end reliable ground；P-wire is yellow, green, red to be coupled on the corresponding voltage and current terminal of instrument, test
The wire clamp of line is coupled on the high-voltage connection terminal of test item；Instrument powers on, and click starts to measure button, surveys after about 1 minute
Amount is completed.
The present invention is exemplarily described in conjunction with attached drawing above.Obviously, present invention specific implementation is not by above-mentioned side
The limitation of formula.As long as using the improvement for the various unsubstantialities that the inventive concept and technical scheme of the present invention carry out；Or not
It is improved, above-mentioned conception and technical scheme of the invention are directly applied into other occasions, in protection scope of the present invention
Within.
Claims (1)
1. a kind of Assembled high-voltage shunted capacitor set detecting device, it is characterised in that: defeated including power circuit and power circuit
The connected relay switching circuit of outlet, D/A conversion circuit, control chip, digital power amplifier circuit, display device；Relay is cut
The current input terminal of the current output terminal and capacitor group to be detected that change circuit connects, the voltage input end of relay switching circuit
Connect with the voltage output end of capacitor group to be detected；The input terminal phase of the output end of D/A conversion circuit and digital power amplifier
Even, the output end and relay switching circuit input terminal of digital power amplifier circuit connect, digital power amplifier circuit output end and relay
Sample circuit, the voltage signal inputs of sample circuit and the electricity of relay switching circuit are connected between switching circuit input terminal
Signal output end is pressed to be connected, the output end and control chip of sample circuit connect, and the input terminal for controlling chip is also connected with keyboard,
The output end and display device for controlling chip connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810938483.8A CN110261683A (en) | 2018-08-17 | 2018-08-17 | A kind of Assembled high-voltage shunted capacitor set detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810938483.8A CN110261683A (en) | 2018-08-17 | 2018-08-17 | A kind of Assembled high-voltage shunted capacitor set detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110261683A true CN110261683A (en) | 2019-09-20 |
Family
ID=67911701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810938483.8A Pending CN110261683A (en) | 2018-08-17 | 2018-08-17 | A kind of Assembled high-voltage shunted capacitor set detecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110261683A (en) |
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-
2018
- 2018-08-17 CN CN201810938483.8A patent/CN110261683A/en active Pending
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| JP2010200564A (en) * | 2009-02-27 | 2010-09-09 | Yaskawa Electric Corp | Motor driving device and method of detecting terminal voltage of capacitor for charging and discharging energy of the same |
| CN101833043A (en) * | 2010-03-30 | 2010-09-15 | 广元电业局 | Method for measuring electric capacity and dielectric loss of capacitance type voltage transformer |
| CN101893694A (en) * | 2010-06-24 | 2010-11-24 | 国网电力科学研究院武汉南瑞有限责任公司 | Error testing device of voltage transformator |
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| CN103323680A (en) * | 2013-07-08 | 2013-09-25 | 国家电网公司 | Device for capacitance detection and balanced configuration of capacitor bank |
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