CN201540366U - Three-phase harmonic standard calibration and verification device - Google Patents
Three-phase harmonic standard calibration and verification device Download PDFInfo
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- CN201540366U CN201540366U CN2009201992973U CN200920199297U CN201540366U CN 201540366 U CN201540366 U CN 201540366U CN 2009201992973 U CN2009201992973 U CN 2009201992973U CN 200920199297 U CN200920199297 U CN 200920199297U CN 201540366 U CN201540366 U CN 201540366U
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Abstract
The utility model relates to a three-phase harmonic standard calibration and verification device. A harmonic standard power source is connected with a harmonic signal generating unit acquiring all harmonic parameters from the harmonic standard power source. The harmonic signal generating unit is connected with a power converting unit used for converting harmonic signals obtained into harmonic signals simulating the real work voltage and current of low voltage power grids. The device also comprises a harmonic electric energy metering module. The harmonic electric energy metering module comprises a voltage converting unit and a current converting unit. The voltage converting unit is connected with a first ADC (analog to digital converting) unit, and the current converting unit is connected with a second ADC unit. The harmonic electric energy metering module also comprises a DSP (digital signal processing) calculating module. The DSP calculating module comprises a FFT (fast fourier transform) module and an amplitude phase compensation module. The amplitude phase compensation module is used for obtaining all harmonic parameters by calculating harmonic amplitudes and harmonic phase values which are output by the FFT module. The utility model provides a three-phase harmonic standard calibration and verification device for calibrating and verifying harmonic electric energy meters.
Description
(1) technical field
The utility model relates to a kind of three phase harmonic standard calibrating and measuring device.
(2) background technology
Along with the development of heavy industry such as modern industry and traffic, metallurgy, chemical industry and electric railway, the factor that influences the quality of power supply becomes increasingly complex, and wherein main is exactly electric harmonic.Impact and harmonic wave that these nonlinear-loads produce electrical network not only constitute very big harm to power system device and stabilization of power grids safe operation, and have influenced rationality and the fairness of conventional instrument to electric energy metrical.Therefore, the high-accuracy multifunctional electric energy meter with the monitoring of harmonic wave and metering becomes the electric energy metrical new product of new generation that power department emphasis is in recent years applied, and also makes power department that the real-time monitoring of power grid quality has been had certain means and foundation.
Because power department need use a large amount of harmonic electric energy tables, and domestic electric power detects electric energy meter checking device that department, metrological service, manufacturing enterprise use at present and can't the harmonic electric energy table be calibrated and traces to the source, and this just is badly in need of corresponding high-grade harmonic wave calibration equipment it is examined and determine and calibrates.
(3) summary of the invention
In view of the deficiency that the electric energy meter checking device of present use can't be calibrated and trace to the source the harmonic electric energy table, the utility model provides a kind of three phase harmonic standard calibrating and measuring device that the harmonic electric energy table is calibrated and examined and determine.
The technical scheme in the invention for solving the technical problem is: a kind of three phase harmonic standard calibrating and measuring device, comprise harmonic electric energy calibration power source, described harmonic standard power source is connected with the harmonic signal generating unit that obtains each harmonic parameters from it, and described harmonic signal generating unit is connected with the Power Conversion unit that is used for its harmonic signal that obtains is converted to the harmonic signal under the simulation low voltage electric network real work voltage and current situation;
Also comprise the harmonic electric energy metering module, described harmonic electric energy metering module comprise be used for will input the alternating voltage of different amplitudes convert the current transformation unit that the voltage transformation module of analog to digital converter acceptable alternating voltage small-signal, the alternating current that is used for different amplitudes that will input convert analog to digital converter acceptable alternating voltage small-signal to, described change in voltage unit all is connected with the input end of described Power Conversion unit with the input end of current transformation unit;
The output terminal of described voltage transformation module is connected with an ADC converting unit that analog voltage signal is transformed into digital signal, and the output terminal of described current transformation unit is connected with the 2nd ADC converting unit that analog voltage signal is transformed into digital signal;
Described harmonic electric energy metering module also comprises the DSP computing module, described DSP computing module comprises the FFT conversion module that is used for the digital signal of an ADC converting unit and the 2nd ADC converting unit input is carried out output integer after the fast fourier transform time and 1/4 subharmonic amplitude and harmonic phase, be used for the harmonious phase of wave place value of the humorous wave amplitude of FFT conversion module output is calculated the amplitude phase compensation block of each harmonic parameters, a described ADC converting unit all is connected with described FFT conversion module with the 2nd ADC converting unit, and described FFT conversion module also is connected with described amplitude phase compensation block;
This three phase harmonic standard electric energy meter comprises that also one is used for described harmonic electric energy metering module and the extraneous communication module that carries out communication, described communication module connects and is used to the human-computer interaction module that shows the display screen of each harmonic parameters and be used for the harmonic parameters of described standard harmonic power source is set, and this communication module also comprises and is used for the RS232 interface that is connected with external control devices;
Comprise that also thereby being used to receive each harmonic parameters that described amplitude phase compensation block calculates adjusts each harmonic parameters that the harmonic signal generating unit takes place, the consistent feedback control module of each harmonic parameters that harmonic parameters that the harmonic signal generating unit produces and amplitude phase compensation block are calculated.
Further, described display screen is LCD display or TFT display screen.
Further, described human-computer interaction module is a computing machine.
Further, described computing machine adopts Windows CE operating system.
Further, described computing machine adopts touch-screen as input equipment.
The utility model in use, the harmonic voltage amplitude that need export harmonic electric energy calibration power source, the current harmonics amplitude, harmonic phase, harmonic wave active power, the harmonic wave reactive power, the forward harmonic electric energy, reverse harmonic electric energy, after total these parameters of harmonic electric energy are set, the harmonic signal generating unit produces the harmonic voltage amplitude that is used for the driving power converter unit, the harmonic current amplitude, the harmonic voltage phase place, the harmonic current phase place, the Power Conversion unit is low pressure small-signal (the harmonic voltage amplitude from the harmonic signal generating unit, the harmonic current amplitude, the harmonic voltage phase place, the harmonic current phase place) converts the high-voltage signal of simulating under the low voltage electric network real work voltage and current state to;
Voltage transformation module and current transformation unit can be selected suitable range according to the amplitude that inserts voltage and current signal, and the voltage and current signal of outside input is transformed into corresponding with it ADC converting unit acceptable voltage signal; The one ADC converting unit, the 2nd ADC converting unit are imported the DSP computing module to the analog voltage signal of input through becoming digital signal after quantizing; FFT conversion module in the DSP computing module obtains the integer time of input voltage, current signal and 1/4 subharmonic amplitude, harmonic phase value to the ADC digital signal of input through FFT (fast Fourier transform) back; Just obtained harmonic voltage amplitude, current harmonics amplitude, harmonic phase, harmonic wave active power, harmonic wave reactive power, forward harmonic electric energy, reverse harmonic electric energy, total these parameters of harmonic electric energy accurately after the harmonious phase of wave place value of these humorous wave amplitudes is calculated through the amplitude phase compensation block, these parameters can show on display screen through the transmission of communication module.Human-computer interaction module is used to operate various steering orders, for example show harmonic voltage amplitude, current harmonics amplitude, harmonic phase, harmonic wave active power, harmonic wave reactive power, forward harmonic electric energy, oppositely parameter such as harmonic electric energy, total harmonic electric energy selection, voltage, current range conversion etc.Its effect of RS232 interface in the communication module is to adopt the communication mode of duplex to receive the order of this equipment being controlled by external control devices, as voltage, current range are set; Also send the numerical value of various harmonic measure parameters to external control devices, as harmonic voltage amplitude, current harmonics amplitude, harmonic phase, harmonic wave active power, harmonic wave reactive power, forward harmonic electric energy, oppositely harmonic electric energy, total harmonic electric energy etc. according to the external control order.
The feedback control module that interrelates with the harmonic signal generating unit receives from harmonic electric energy metering module measured actual harmonic voltage amplitude, harmonic current amplitude, harmonic voltage phase place, harmonic current phase value, and the harmonic voltage amplitude of actual measured value and setting, harmonic current amplitude, harmonic voltage phase place, harmonic current phase value compared, make setting value consistent with real output value.
The beneficial effects of the utility model are: 1. can carry out accurate metering in the 0-360 degree scope to each time voltage, current harmonics amplitude, harmonic phase, harmonic wave active power, the harmonic wave reactive power of 1-60 integral frequency harmonizing wave and 1/4 mark subharmonic by the FFT conversion module in the DSP computing module and amplitude phase compensation block, and can distinguish the direction of harmonic trend.2. owing to adopted the harmonic electric energy metering module of signal source end feedback control unit and high precision, the standard source setting value is consistent with real output value, has simplified running program greatly, has saved the original artificial step of adjusting, improve efficiency of measurement, reduced labor intensity of operating personnel.2. the calculating by the amplitude phase compensation block can be exported forward harmonic electric energy, oppositely harmonic electric energy, total harmonic electric energy, can carry out that the algebraic sum mode adds up and the absolute value mode adds up to harmonic electric energy, power.3. by high-precision voltage transformation module, current transformation unit, ADC converter unit, FFT conversion module and amplitude phase compensation block, this standard scale can reach very high accuracy class.4. adopt windows CE operating system, have very strong reliability and security, and tool man machine operation interface very easily, anyly can use can manipulating very easily per capita of desktop windows operating system.5. adopt touch-sensitive display to carry out man-machine interaction, adopt this mode step that can simplify the operation greatly, operate very simple.
(4) description of drawings
Fig. 1 is a theory diagram of the present utility model.
(5) embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
With reference to Fig. 1, a kind of three phase harmonic standard calibrating and measuring device, comprise harmonic electric energy calibration power source 12, described harmonic standard power source 12 is connected with the harmonic signal generating unit 12 that obtains each harmonic parameters from it, and described harmonic signal generating unit 12 is connected 14 with the Power Conversion unit that is used for its harmonic signal that obtains is converted to the harmonic signal under the simulation low voltage electric network real work voltage and current situation;
Also comprise harmonic electric energy metering module 1, described harmonic electric energy metering module 1 comprise be used for will input the alternating voltage of different amplitudes convert the current transformation unit 3 that the voltage transformation module 2 of analog to digital converter acceptable alternating voltage small-signal, the alternating current that is used for different amplitudes that will input convert analog to digital converter acceptable alternating voltage small-signal to, described change in voltage unit 2 all is connected with the input end of described Power Conversion unit 14 with the input end of current transformation unit 3;
The output terminal of described voltage transformation module 2 is connected with an ADC converting unit 4 that analog voltage signal is transformed into digital signal, and the output terminal of described current transformation unit 3 is connected with the 2nd ADC converting unit 5 that analog voltage signal is transformed into digital signal; Described harmonic electric energy metering module 1 also comprises DSP computing module 6, described DSP computing module 6 comprises the FFT conversion module 7 that is used for the digital signal of an ADC converting unit 4 and the input of the 2nd ADC converting unit 5 is carried out output integer after the fast fourier transform time and 1/4 subharmonic amplitude and harmonic phase, be used for the harmonious phase of wave place value of humorous wave amplitude of FFT conversion module 7 outputs is calculated the amplitude phase compensation block 8 of each harmonic parameters, a described ADC converting unit 4 all is connected with described FFT conversion module 7 with the 2nd ADC converting unit 5, and described FFT conversion module 7 also is connected with described amplitude phase compensation block 8; This three phase harmonic standard electric energy meter comprises that also one is used for described harmonic electric energy metering module 1 and the extraneous communication module 9 that carries out communication, described communication module 9 connects display screen 10 and the human-computer interaction module 11 that is used to show each harmonic parameters, and this communication module 9 also comprises and is used for the RS232 interface 12 that is connected with external control devices.
In the present embodiment, described display screen 10 can be selected LCD display or TFT display screen.
In the present embodiment, described human-computer interaction module 11 is a computing machine, and this computing machine adopts Windows CE operating system, has data-carrier store and USB interface in this computing machine.
The utility model in use, the harmonic voltage amplitude that harmonic electric energy calibration power source 12 is needed output, the current harmonics amplitude, harmonic phase, harmonic wave active power, the harmonic wave reactive power, the forward harmonic electric energy, reverse harmonic electric energy, after total these parameters of harmonic electric energy are set, harmonic signal generating unit 13 produces the harmonic voltage amplitude that is used for driving power converter unit 14, the harmonic current amplitude, the harmonic voltage phase place, the harmonic current phase place, Power Conversion unit 14 is low pressure small-signal (the harmonic voltage amplitude from the harmonic signal generating unit, the harmonic current amplitude, the harmonic voltage phase place, the harmonic current phase place) converts the high-voltage signal of simulating under the low voltage electric network real work voltage and current state to;
Claims (5)
1. three phase harmonic standard calibrating and measuring device, it is characterized in that: comprise harmonic electric energy calibration power source, described harmonic standard power source is connected with the harmonic signal generating unit that obtains each harmonic parameters from it, and described harmonic signal generating unit is connected with the Power Conversion unit that is used for its harmonic signal that obtains is converted to the harmonic signal under the simulation low voltage electric network real work voltage and current situation;
Also comprise the harmonic electric energy metering module, described harmonic electric energy metering module comprise be used for will input the alternating voltage of different amplitudes convert the current transformation unit that the voltage transformation module of analog to digital converter acceptable alternating voltage small-signal, the alternating current that is used for different amplitudes that will input convert analog to digital converter acceptable alternating voltage small-signal to, described change in voltage unit all is connected with the input end of described Power Conversion unit with the input end of current transformation unit;
The output terminal of described voltage transformation module is connected with an ADC converting unit that analog voltage signal is transformed into digital signal, and the output terminal of described current transformation unit is connected with the 2nd ADC converting unit that analog voltage signal is transformed into digital signal;
Described harmonic electric energy metering module also comprises the DSP computing module, described DSP computing module comprises the FFT conversion module that is used for the digital signal of an ADC converting unit and the 2nd ADC converting unit input is carried out output integer after the fast fourier transform time and 1/4 subharmonic amplitude and harmonic phase, be used for the harmonious phase of wave place value of the humorous wave amplitude of FFT conversion module output is calculated the amplitude phase compensation block of each harmonic parameters, a described ADC converting unit all is connected with described FFT conversion module with the 2nd ADC converting unit, and described FFT conversion module also is connected with described amplitude phase compensation block;
This three phase harmonic standard electric energy meter comprises that also one is used for described harmonic electric energy metering module and the extraneous communication module that carries out communication, described communication module connects and is used to the human-computer interaction module that shows the display screen of each harmonic parameters and be used for the harmonic parameters of described standard harmonic power source is set, and this communication module also comprises and is used for the RS232 interface that is connected with external control devices;
Comprise that also thereby being used to receive each harmonic parameters that described amplitude phase compensation block calculates adjusts each harmonic parameters that the harmonic signal generating unit takes place, the consistent feedback control module of each harmonic parameters that harmonic parameters that the harmonic signal generating unit produces and amplitude phase compensation block are calculated.
2. three phase harmonic standard electric energy meter as claimed in claim 1 is characterized in that: described display screen is LCD display or TFT display screen.
3. three phase harmonic standard electric energy meter as claimed in claim 1 or 2 is characterized in that: described human-computer interaction module is a computing machine.
4. three phase harmonic standard electric energy meter as claimed in claim 3 is characterized in that: described computing machine adopts Windows CE operating system.
5. three phase harmonic standard electric energy meter as claimed in claim 4 is characterized in that: described computing machine adopts touch-screen as input equipment.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201992973U CN201540366U (en) | 2009-11-11 | 2009-11-11 | Three-phase harmonic standard calibration and verification device |
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| CN2009201992973U CN201540366U (en) | 2009-11-11 | 2009-11-11 | Three-phase harmonic standard calibration and verification device |
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| CN201540366U true CN201540366U (en) | 2010-08-04 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102129058A (en) * | 2010-12-15 | 2011-07-20 | 中国西电电气股份有限公司 | Direct-current voltage divider calibration device for direct-current power transmission system |
| CN103487778A (en) * | 2013-10-12 | 2014-01-01 | 南京深科博业电气股份有限公司 | Analog quantity correcting method and single-CPU (Central Processing Unit) low-pressure protector based on analog quantity correcting method |
| CN104808166A (en) * | 2015-05-18 | 2015-07-29 | 国网上海市电力公司 | Calibration method for resistive current measurement and calibration device thereof |
| CN105487032A (en) * | 2016-01-04 | 2016-04-13 | 国网山东省电力公司青岛供电公司 | Verification device |
| CN107356898A (en) * | 2017-08-29 | 2017-11-17 | 广东电网有限责任公司电力科学研究院 | A kind of harmonic signal source calibration method and power quality standard harmonic signal source |
| CN111190132A (en) * | 2020-01-03 | 2020-05-22 | 深圳供电局有限公司 | Amplitude precision calibration method and system of ultrahigh harmonic measurement device |
| CN118330311A (en) * | 2024-06-13 | 2024-07-12 | 中国电力科学研究院有限公司 | Three-phase multifunctional standard harmonic electric energy meter and three-phase harmonic electric energy measuring method |
-
2009
- 2009-11-11 CN CN2009201992973U patent/CN201540366U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102129058A (en) * | 2010-12-15 | 2011-07-20 | 中国西电电气股份有限公司 | Direct-current voltage divider calibration device for direct-current power transmission system |
| CN103487778A (en) * | 2013-10-12 | 2014-01-01 | 南京深科博业电气股份有限公司 | Analog quantity correcting method and single-CPU (Central Processing Unit) low-pressure protector based on analog quantity correcting method |
| CN103487778B (en) * | 2013-10-12 | 2015-11-11 | 南京深科博业电气股份有限公司 | A kind of analog quantity bearing calibration and the single CPU low-voltage protection device based on the method |
| CN104808166A (en) * | 2015-05-18 | 2015-07-29 | 国网上海市电力公司 | Calibration method for resistive current measurement and calibration device thereof |
| CN105487032A (en) * | 2016-01-04 | 2016-04-13 | 国网山东省电力公司青岛供电公司 | Verification device |
| CN107356898A (en) * | 2017-08-29 | 2017-11-17 | 广东电网有限责任公司电力科学研究院 | A kind of harmonic signal source calibration method and power quality standard harmonic signal source |
| CN111190132A (en) * | 2020-01-03 | 2020-05-22 | 深圳供电局有限公司 | Amplitude precision calibration method and system of ultrahigh harmonic measurement device |
| CN111190132B (en) * | 2020-01-03 | 2022-03-08 | 深圳供电局有限公司 | Amplitude precision calibration method and system of ultrahigh harmonic measurement device |
| CN118330311A (en) * | 2024-06-13 | 2024-07-12 | 中国电力科学研究院有限公司 | Three-phase multifunctional standard harmonic electric energy meter and three-phase harmonic electric energy measuring method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Ningbo Wei Ji Electronics Co., Ltd. Assignor: Wu Weizong Contract record no.: 2011330001074 Denomination of utility model: Three-phase harmonic standard calibration and verification device Granted publication date: 20100804 License type: Exclusive License Record date: 20110817 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100804 Termination date: 20171111 |
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| CF01 | Termination of patent right due to non-payment of annual fee |