CN113358932A - Device and method for detecting synchronous phase angle of medium-voltage frequency converter - Google Patents
Device and method for detecting synchronous phase angle of medium-voltage frequency converter Download PDFInfo
- Publication number
- CN113358932A CN113358932A CN202110510954.7A CN202110510954A CN113358932A CN 113358932 A CN113358932 A CN 113358932A CN 202110510954 A CN202110510954 A CN 202110510954A CN 113358932 A CN113358932 A CN 113358932A
- Authority
- CN
- China
- Prior art keywords
- phase
- power supply
- electrical signal
- synchronous
- phase deviation
- 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
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000005259 measurement Methods 0.000 claims abstract description 10
- 238000001514 detection method Methods 0.000 claims abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 230000010363 phase shift Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 208000033999 Device damage Diseases 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R25/00—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Phase Differences (AREA)
Abstract
The invention discloses a synchronous phase angle detection device of a medium-voltage frequency converter, relates to the technical field of frequency conversion, and solves the technical problem of potential safety hazard in phase deviation measurement in the related technology due to high voltage. The device comprises a main power supply, an incoming line power supply receiver, a synchronous power supply receiver, a power supply and a phase deviation display, wherein the main power supply is connected with the incoming line power supply receiver, the incoming line power supply receiver is used for converting received main power supply electric signals into first electric signals which are low in voltage and have no phase difference, the synchronous power supply is connected with the synchronous power supply receiver, the synchronous power supply receiver is used for converting the received synchronous power supply electric signals into second electric signals which are low in voltage and have no phase difference, the power supply is connected with the phase deviation display, and the incoming line power supply receiver and the synchronous power supply receiver are both connected with the phase deviation display. Convenient and fast to use, solves the safety problem in the measurement process.
Description
Technical Field
The invention relates to the technical field of frequency conversion, in particular to a device and a method for detecting a synchronous phase angle of a medium-voltage frequency converter.
Background
In the debugging process of the medium-voltage frequency converter, the phase deviation between a synchronous power supply and a main power supply inlet wire is an essential part, and the safety problem exists during the test due to the fact that the voltage level is high in the measuring process.
Disclosure of Invention
The application provides a device and a method for detecting a synchronous phase angle of a medium-voltage frequency converter, which solve the technical problem that potential safety hazards exist in phase deviation measurement in the related technology due to high voltage.
The utility model provides a synchronous phase angle detection device of medium voltage inverter, including the main power supply, inlet wire power receiver, synchronous power supply, synchronous power receiver, power supply and phase deviation display, the main power supply is connected with inlet wire power receiver, inlet wire power receiver is used for converting received main power supply signal of telecommunication into the first signal of telecommunication of low-voltage and no phase difference, synchronous power supply is connected with synchronous power receiver, synchronous power receiver is used for converting received synchronous power supply signal of telecommunication into the second signal of telecommunication of low-voltage and no phase difference, power supply is connected with the phase deviation display, inlet wire power receiver and synchronous power receiver all are connected with the phase deviation display.
Optionally, the phase deviation display comprises an oscilloscope, and the first electrical signal and the second electrical signal are respectively input into a Y1 channel and a Y2 channel of the oscilloscope;
the first electrical signal and the second electrical signal have equal amplitudes.
Optionally, a variable phase shifter is built in the phase deviation display, which is configured to measure the phase difference by a null method.
Optionally, a digital phase meter is provided in the phase deviation display.
Optionally, a phase detector is provided within the phase deviation display.
A method for detecting a synchronous phase angle of a medium voltage frequency converter comprises the following steps:
s1, the incoming line power receiver converts the input main power electrical signal into a first electrical signal with low voltage and no phase difference, and the synchronous power receiver converts the input synchronous power electrical signal into a second electrical signal with low voltage and no phase difference;
s2, sending the first electric signal and the second electric signal to a phase deviation display;
and S3, obtaining the phase difference between the main power supply and the synchronous power supply according to the phase deviation display, and filling the deviation angle into related parameters of the frequency converter.
Alternatively, the amplitudes of the first electrical signal and the second electrical signal are equal in step S1, and the phase shift display includes an oscilloscope in step S2, and the first electrical signal and the second electrical signal are respectively input to a Y1 channel and a Y2 channel of the oscilloscope, and are adjusted so that the screen of the phase shift display displays waveforms that are symmetrical up and down.
Alternatively, a variable phase shifter is provided in the phase deviation display, and the phase difference is measured by a zero indication method in step S3.
Alternatively, a digital phase meter is provided in the phase deviation display, and the phase difference is converted into a time interval measurement in step S3.
Optionally, a phase detector is arranged in the phase deviation display, and the phase difference is converted into voltage to be measured in step S3.
The beneficial effect of this application is as follows: this application is through inlet wire power receiver and synchronous power receiver, respectively with the voltage reduction of main power and synchronous power supply to no phase difference changes around when guaranteeing the voltage reduction, will fall the first signal of telecommunication and the second signal of telecommunication of phase difference input to the phase deviation display, the analysis obtains the phase deviation of main power and synchronous power supply, wherein supplies power to the phase deviation display through the power supply, convenient to use is swift, solve because the unsafe problem that high voltage exists.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention.
Fig. 1 is a schematic diagram of a synchronous phase angle detection apparatus of a medium voltage inverter according to the present application.
The attached drawings are marked as follows: 100-incoming line power receiver, 200-synchronous power receiver, 300-power supply, 400-phase deviation display.
Detailed Description
The embodiment of the application provides a device and a method for detecting a synchronous phase angle of a medium-voltage frequency converter, and solves the technical problem that potential safety hazards exist in phase deviation measurement in the related technology due to high voltage.
In order to solve the technical problems, the general idea of the embodiment of the application is as follows:
the utility model provides a synchronous phase angle detection device of medium-voltage inverter, including the main power supply, inlet wire power receiver, synchronous power supply, synchronous power receiver, power supply and phase deviation display, the main power supply is connected with inlet wire power receiver, inlet wire power receiver is used for converting the received main power supply signal of telecommunication into the first signal of telecommunication of low-voltage and no phase difference, synchronous power supply is connected with synchronous power receiver, synchronous power receiver is used for converting the received synchronous power supply signal of telecommunication into the second signal of telecommunication of low-voltage and no phase difference, power supply is connected with the phase deviation display, inlet wire power receiver and synchronous power receiver all are connected with the phase deviation display.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
Example 1
Referring to fig. 1, the present embodiment provides a synchronous phase angle detection apparatus for a medium voltage inverter, which includes a main power source, an incoming power source receiver 100, a synchronous power source receiver 200, a power supply 300, and a phase deviation display 400. The main power source is connected to the incoming power source receiver 100, the synchronous power source is connected to the synchronous power source receiver 200, and both the incoming power source receiver 100 and the synchronous power source receiver 200 are connected to the phase deviation display 400. The power supply 300 is connected to the phase deviation display 400, the power supply 300 provides an AC220V voltage,
the incoming line power receiver 100 is configured to convert a received main power electrical signal into a first electrical signal with a low voltage and no phase difference, and the synchronous power receiver 200 is configured to convert a received synchronous power electrical signal into a second electrical signal with a low voltage and no phase difference. Both the incoming line power receiver 100 and the synchronous power receiver 200 can use partial transformers to achieve the purpose of voltage reduction and no phase difference between the front and the back.
In the embodiment, the voltages of the main power source and the synchronous power source are respectively reduced through the incoming line power source receiver 100 and the synchronous power source receiver 200, and no phase difference is changed before and after the voltage reduction is ensured, the first electric signal and the second electric signal which are reduced in voltage and have no phase difference are input to the phase deviation display 400, the phase deviation of the main power source and the synchronous power source is obtained through analysis, wherein the power supply 300 is used for supplying power to the phase deviation display 400, the use is convenient and fast, and the unsafe problem caused by high voltage is solved.
When the phase deviation display 400 is selected as an oscilloscope, the phase difference is measured by the oscilloscope, that is, the first electrical signal and the second electrical signal are respectively input into the Y1 channel and the Y2 channel of the oscilloscope.
In the technical scheme of the oscilloscope, the amplitudes of the first electric signal and the second electric signal are controlled to be equal, so that the fluorescent screen of the phase deviation display 400 can display vertically symmetrical waveforms through convenient adjustment, and an operator can calculate and obtain the phase deviation of the first electric signal and the second electric signal, namely the phase deviation of the main power supply and the synchronous power supply, by reading parameters. And the operator obtains the required debugging phase deviation parameters and fills the parameters into the relevant parameters of the frequency converter.
In the mode of the oscilloscope, because the amplitudes of the first electric signal and the second electric signal are equal, the signals are input into the oscilloscope, so that the complex adjusting process is simplified, the required stable oscillogram is conveniently and quickly obtained, the defect of complex steps in the original testing process is overcome, and the oscilloscope has outstanding beneficial effects.
Through the synchronous phase angle detection device of the medium-voltage frequency converter, the actual deviation angle is calculated by conveniently and quickly using the phase of the main power supply and the phase of the synchronous power supply, the actual deviation angle is directly input in the frequency converter parameter, the device is conveniently and quickly used, the actual debugging time is saved, the problem that the device is unsafe due to high voltage is solved, and the adverse conditions that the actual output voltage is not matched or the device is damaged due to the calculation error of the phase-shifting angle are also improved.
Alternatively, the phase deviation display 400 may also use a zero-reading method to measure the phase difference, with a variable phase shifter built in, and determine the phase difference between the measured signals by comparing the phase shift value of a precision phase shifter with the measured phase shift value.
Alternatively, the phase deviation display 400 may also adopt a method of converting the phase difference into time interval measurement, and a digital phase meter is arranged in the phase deviation display, and the phase difference is calculated by converting the time difference Δ T between the signal shaft body T and the signal zero crossing point into voltage and pulse width, and measuring T and Δ T.
Alternatively, the phase deviation display 400 may also adopt a mode of converting phase difference into voltage for measurement, a phase detector is arranged in the phase deviation display, a nonlinear electronic device is used for converting the phase difference of the measured signal into increment of voltage or current, and the position of a pointer of a voltmeter or an ammeter on a corresponding dial plate is directly read out, namely, the phase difference of the measured signal is directly read out through the phase deviation display 400.
Example 2
The embodiment provides a method for detecting a synchronous phase angle of a medium-voltage frequency converter, which comprises the following steps:
step S1, the incoming line power receiver 100 converts the input main power electrical signal into a first electrical signal with low voltage and no phase difference, and the synchronous power receiver 200 converts the input synchronous power electrical signal into a second electrical signal with low voltage and no phase difference;
step S2, sending the first electrical signal and the second electrical signal to the phase deviation display 400;
step S3, obtaining the phase difference between the main power source and the synchronous power source according to the phase deviation display 400, and filling the deviation angle into the related parameters of the frequency converter.
The incoming line power receiver 100 and the synchronous power receiver 200 can both use partial transformers to achieve the purpose of voltage reduction and no phase difference between the front and the back. In the embodiment, the voltages of the main power source and the synchronous power source are respectively reduced through the incoming line power source receiver 100 and the synchronous power source receiver 200, and no phase difference is changed before and after the voltage reduction is ensured, the first electric signal and the second electric signal which are reduced in voltage and have no phase difference are input to the phase deviation display 400, the phase deviation of the main power source and the synchronous power source is obtained through analysis, wherein the power supply 300 is used for supplying power to the phase deviation display 400, the use is convenient and fast, and the unsafe problem caused by high voltage is solved.
Alternatively, the phase offset display 400 may select the manner in which the oscilloscope measures the phase difference. In this mode, the amplitudes of the first electrical signal and the second electrical signal are controlled to be equal; in step S2, the first electrical signal and the second electrical signal are respectively input to a Y1 channel and a Y2 channel of the oscilloscope, and the adjustment is performed so that the screen of the phase deviation display 400 displays vertically symmetrical waveforms, thereby facilitating an operator to calculate and obtain the phase deviation between the first electrical signal and the second electrical signal, that is, the phase deviation between the main power supply and the synchronous power supply, by reading parameters. And the operator obtains the required debugging phase deviation parameters and fills the parameters into the relevant parameters of the frequency converter.
In the mode of the oscilloscope, because the amplitudes of the first electric signal and the second electric signal are equal, the signals are input into the oscilloscope, so that the complex adjusting process is simplified, the required stable oscillogram is conveniently and quickly obtained, the defect of complex steps in the original testing process is overcome, and the oscilloscope has outstanding beneficial effects.
By utilizing the method for detecting the synchronous phase angle of the medium-voltage frequency converter, the actual deviation angle is conveniently and quickly calculated by the phase of the main power supply and the phase of the synchronous power supply, the actual deviation angle is directly input into the frequency converter, the method is conveniently and quickly used, the actual debugging time is saved, the problem of unsafety caused by high voltage is solved, and the adverse conditions of unmatched actual output voltage or device damage caused by the calculation error of the phase-shifting angle are also improved.
Alternatively, the phase deviation display 400 is provided with a variable phase shifter therein, and the phase difference is measured by a zero-reading method in step S3, and the phase difference between the measured signals is determined by comparing the phase shift value of a fine phase shifter with the measured phase shift value.
Alternatively, the phase deviation display 400 is provided with a digital phase meter therein, and the phase difference is calculated by converting the phase difference into a time interval measurement in step S3, converting the time difference Δ T between the signal shaft body T and the signal zero crossing point into a voltage and a pulse width, and measuring T and Δ T.
Alternatively, a phase detector is arranged in the phase deviation display 400, the phase difference is converted into voltage for measurement in step S3, the phase difference of the measured signal is converted into increment of voltage or current by using a nonlinear electronic device, and the position of the pointer of the voltmeter or ammeter on the corresponding dial is directly read out through the phase deviation display 400.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A synchronous phase angle detection device of a medium voltage frequency converter is characterized by comprising:
the incoming line power receiver is used for converting a received main power electrical signal into a first electrical signal with low voltage and no phase difference;
the synchronous power supply and the synchronous power supply receiver are connected, and the synchronous power supply receiver is used for converting the received synchronous power supply electric signal into a second electric signal with low voltage and no phase difference;
the power supply and the phase deviation display that are connected, inlet wire power receiver with synchronous power receiver all with the phase deviation display is connected.
2. The apparatus of claim 1, wherein the phase deviation display comprises an oscilloscope, and the first electrical signal and the second electrical signal are respectively input to a Y1 channel and a Y2 channel of the oscilloscope;
the first electrical signal and the second electrical signal have equal amplitudes.
3. The apparatus of claim 1, wherein the phase deviation display is configured to measure the phase difference by a zero-reading method and has a variable phase shifter therein.
4. The apparatus as claimed in claim 1, wherein the phase deviation indicator comprises a digital phase meter.
5. The apparatus as claimed in claim 1, wherein a phase detector is disposed in the phase deviation display.
6. A method for detecting a synchronous phase angle of a medium-voltage frequency converter is characterized by comprising the following steps:
s1, the incoming line power receiver converts the input main power electrical signal into a first electrical signal with low voltage and no phase difference, and the synchronous power receiver converts the input synchronous power electrical signal into a second electrical signal with low voltage and no phase difference;
s2, sending the first electric signal and the second electric signal to a phase deviation display;
and S3, obtaining the phase difference between the main power supply and the synchronous power supply according to the phase deviation display, and filling the deviation angle into related parameters of the frequency converter.
7. The method as claimed in claim 6, wherein the amplitudes of the first electrical signal and the second electrical signal are equal in step S1, and the phase deviation display comprises an oscilloscope in step S2, and the first electrical signal and the second electrical signal are respectively inputted into Y1 channel and Y2 channel of the oscilloscope, so as to adjust the display screen of the phase deviation display to display vertically symmetrical waveforms.
8. The method as claimed in claim 6, wherein the phase deviation indicator is internally provided with a variable phase shifter, and the phase difference is measured by a zero-indication method in step S3.
9. The method as claimed in claim 6, wherein the phase deviation indicator is a digital phase meter, and the step S3 is implemented by converting the phase difference into time interval measurement.
10. The method as claimed in claim 6, wherein a phase detector is disposed in the phase deviation display, and the step S3 is performed by converting the phase difference into a voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110510954.7A CN113358932A (en) | 2021-05-11 | 2021-05-11 | Device and method for detecting synchronous phase angle of medium-voltage frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110510954.7A CN113358932A (en) | 2021-05-11 | 2021-05-11 | Device and method for detecting synchronous phase angle of medium-voltage frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113358932A true CN113358932A (en) | 2021-09-07 |
Family
ID=77526086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110510954.7A Pending CN113358932A (en) | 2021-05-11 | 2021-05-11 | Device and method for detecting synchronous phase angle of medium-voltage frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113358932A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030030816A1 (en) * | 2001-08-11 | 2003-02-13 | Eom Tae Bong | Nonlinearity error correcting method and phase angle measuring method for displacement measurement in two-freqency laser interferometer and displacement measurement system using the same |
| CN1657963A (en) * | 2004-02-20 | 2005-08-24 | 株式会社日立制作所 | Method and system for measuring partial discharge |
| US7808228B1 (en) * | 2008-07-21 | 2010-10-05 | Bierer Walter S | Long range phasing voltmeter |
| CN201845067U (en) * | 2010-05-18 | 2011-05-25 | 上海杰智电工科技有限公司 | Corona discharge tester |
| CN206420948U (en) * | 2017-01-08 | 2017-08-18 | 北京首钢自动化信息技术有限公司 | A kind of device of cabinet capacitor of frequency converter voltage detecting |
| CN108710089A (en) * | 2018-05-16 | 2018-10-26 | 中国神华能源股份有限公司 | Phase monitor method and phase detection device for track circuit power supply |
-
2021
- 2021-05-11 CN CN202110510954.7A patent/CN113358932A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030030816A1 (en) * | 2001-08-11 | 2003-02-13 | Eom Tae Bong | Nonlinearity error correcting method and phase angle measuring method for displacement measurement in two-freqency laser interferometer and displacement measurement system using the same |
| CN1657963A (en) * | 2004-02-20 | 2005-08-24 | 株式会社日立制作所 | Method and system for measuring partial discharge |
| US7808228B1 (en) * | 2008-07-21 | 2010-10-05 | Bierer Walter S | Long range phasing voltmeter |
| CN201845067U (en) * | 2010-05-18 | 2011-05-25 | 上海杰智电工科技有限公司 | Corona discharge tester |
| CN206420948U (en) * | 2017-01-08 | 2017-08-18 | 北京首钢自动化信息技术有限公司 | A kind of device of cabinet capacitor of frequency converter voltage detecting |
| CN108710089A (en) * | 2018-05-16 | 2018-10-26 | 中国神华能源股份有限公司 | Phase monitor method and phase detection device for track circuit power supply |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201444193U (en) | Comprehensive error detection device used for digital electric energy measuring device | |
| CN101281243B (en) | Device and method for testing equipotential closed loop electrical energy meter | |
| CN203572875U (en) | Current detection device for large direct current charge-discharge facility | |
| CN105911512A (en) | Intelligent electric energy meter constant test system and test method thereof | |
| CN214473893U (en) | Alternating magnetometer verification system | |
| CN101839931A (en) | Alternating current signal measurement device, system and method | |
| CN110967660A (en) | Method and system for detecting current transformer | |
| US4937520A (en) | Instrument to measure the errors of apparent power meters | |
| CN102707153A (en) | Contact resistance measuring system and method based on voltage-frequency conversion method | |
| CN108710095B (en) | Impulse voltage generator calibrating device based on linearity analysis | |
| CN107861091B (en) | Dynamic performance tracing method based on dynamic electric energy calibrator | |
| CN113030622A (en) | Self-calibration-based automatic testing device for comprehensive characteristics of mutual inductor | |
| CN113358932A (en) | Device and method for detecting synchronous phase angle of medium-voltage frequency converter | |
| CN117148262A (en) | Verification system for electric energy meter | |
| CN207380122U (en) | MOSFET hourglass source electrode resistance test circuits | |
| Chen et al. | Traceable calibration system for non-conventional current sensors with analogue or digital output | |
| JPS61126485A (en) | Error measuring instrument | |
| WO2022252664A1 (en) | Wireless electrical sensor, and electrical parameter measurement and calculation apparatus, method and system | |
| CN210005590U (en) | forward and reverse microwave power measuring circuits | |
| CN212060551U (en) | Single-phase electric energy meter on-site inspection instrument | |
| CN114137470A (en) | Bandwidth testing device and measuring method thereof | |
| Marais et al. | Reduction of static electricity meter errors by broadband compensation of voltage and current channel differences | |
| CN213023536U (en) | Improve measurement accuracy's capacity tester calibrating device | |
| CA1276234C (en) | Electrical measuring instrument for high voltage power measurements | |
| JPS6275278A (en) | Decision device for instrument accuracy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210907 |
|
| RJ01 | Rejection of invention patent application after publication |