CN203133169U - Device employing novel wiring method for detecting current harmonic quality - Google Patents
Device employing novel wiring method for detecting current harmonic quality Download PDFInfo
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- CN203133169U CN203133169U CN 201320156190 CN201320156190U CN203133169U CN 203133169 U CN203133169 U CN 203133169U CN 201320156190 CN201320156190 CN 201320156190 CN 201320156190 U CN201320156190 U CN 201320156190U CN 203133169 U CN203133169 U CN 203133169U
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- acquisition module
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Abstract
The utility model relates to the technical field of electronics. A device employing a novel wiring method for detecting current harmonic quality includes a harmonic detecting device provided with a data acquisition module. A first port of the data acquisition module is connected with a power transmission bus of a low-voltage side of a distribution transformer. A second port of the data acquisition module is connected with a load power supply line of the low-voltage side of the distribution transformer. The device employing the novel wiring method for detecting current harmonic quality provided by the utility model can be used for realizing harmonic quality testing for three-phase current of low-voltage side of a distribution transformer. Harmonic waves on a measuring point are analyzed according to a testing result for reference of related competent departments.
Description
Technical field
The utility model relates to electronic technology field, relates in particular to the current harmonics quality detection device.
Background technology
Harmonic wave reduces the efficient of production, transmission and the utilization of electric energy, makes device of overheating of electrical, produces vibration and noise, and make insulation ag(e)ing, and shorten serviceable life, even breaks down or burn.Harmonic wave can cause the local parallel resonance of electric system or series resonance, and harmonic content is amplified, and causes equipment burnouts such as capacitor.Harmonic wave also can cause relay protection and aut.eq. misoperation, and electric energy metrical is caused confusion.For the electric system outside, harmonic wave can produce serious interference to communication facilities and electronic equipment.
The voltage that desirable utility network provides should be the voltage magnitude of single and fixing frequency and regulation.The appearance of harmonic current and harmonic voltage is a kind of pollution to utility network, and it makes the residing ecological deterioration of consumer, also consumer is on every side impacted.
The utility model content
The purpose of this utility model is, provides a kind of device that the current harmonics quality is detected by the new mode of connection, to solve the problems of the technologies described above.
The technical matters that the utility model solves can realize by the following technical solutions:
A kind of device that the current harmonics quality is detected by the new mode of connection, comprise a harmonic wave pick-up unit, described harmonic wave pick-up unit is provided with data acquisition module, it is characterized in that, first port of described data acquisition module connects the transmission of electricity bus of substation transformer low-pressure side, and second port of described data acquisition module connects the load supply lines of substation transformer low-pressure side.The utility model can carry out the harmonic wave quality test to substation transformer low-pressure side three-phase current.According to test result, analyze the harmonic wave of this measurement point, be provided with and close competent authorities with reference to use.
First port of described data acquisition module is by the transmission of electricity bus of first mutual inductor connection substation transformer low-pressure side, and second port of described data acquisition module connects the load supply lines of substation transformer low-pressure side by second mutual inductor.
Described harmonic wave pick-up unit also is provided with a data analysis processing module, and described data analysis processing module connects described data acquisition module.
Described harmonic wave pick-up unit also is provided with a human-computer interaction module, and described human-computer interaction module connects described data analysis processing module.The humorous wave mass of circuit-under-test can be known on the one hand by human-computer interaction module, the acquisition parameter of data acquisition module can be adjusted on the other hand.
Described harmonic wave pick-up unit also is provided with a wireless communication module, and described wireless communication module connects described data analysis processing module.Described harmonic wave pick-up unit externally sends testing result by wireless communication module.
Preferred FLUKE 1760 power quality analyzers of described harmonic wave pick-up unit, FLUKE 1760 power quality analyzers arrange parameter: sample window 200ms, no gap rolling analysis, get the mean value of 15 sample window analysis results per 3 seconds, provided 1 group of test result storage in per 1 minute, continuous recording 72 hours.
Description of drawings
Fig. 1 is circuit block diagram of the present utility model;
A kind of wiring diagram when Fig. 2 uses for the utility model.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose with effect is easy to understand, below in conjunction with the further elaboration the utility model of concrete diagram.
See figures.1.and.2, a kind of device that the current harmonics quality is detected by the new mode of connection, comprise a harmonic wave pick-up unit, the harmonic wave pick-up unit is provided with data acquisition module, first port of data acquisition module connects the transmission of electricity bus of substation transformer low-pressure side, and second port of data acquisition module connects the load supply lines of substation transformer low-pressure side.The utility model can carry out the harmonic wave quality test to substation transformer low-pressure side three-phase current.According to test result, analyze the harmonic wave of this measurement point, be provided with and close competent authorities with reference to use.First port of data acquisition module is by the transmission of electricity bus of first mutual inductor connection substation transformer low-pressure side, and second port of data acquisition module connects the load supply lines of substation transformer low-pressure side by second mutual inductor.
The harmonic wave pick-up unit also is provided with a data analysis processing module, and the data analysis processing module connects data acquisition module.The harmonic wave pick-up unit also is provided with a human-computer interaction module, and the human-computer interaction module linking number is processing module according to one's analysis.The humorous wave mass of circuit-under-test can be known on the one hand by human-computer interaction module, the acquisition parameter of data acquisition module can be adjusted on the other hand.The harmonic wave pick-up unit also is provided with a wireless communication module, and the wireless communication module linking number is processing module according to one's analysis.The harmonic wave pick-up unit externally sends testing result by wireless communication module.
The data analysis processing module comprises pre-filtering circuit, AD data acquisition module, zero passage comparator circuit, DSP digital signal processing chip, first current transformer connects the pre-filtering circuit, the pre-filtering circuit connects the AD data acquisition module, and the AD data acquisition module connects the DSP digital signal processing chip.Second mutual inductor connects the pre-filtering circuit, and the pre-filtering circuit connects the zero passage comparator circuit, and the zero passage comparator circuit connects the DSP digital signal processing chip.
Transmission of electricity bus and load supply lines are respectively through behind two current transformers, link to each other with the pre-filtering circuit by two signal line respectively, the pre-filtering circuit links to each other by the input port of unibus with the AD data acquisition module, electrical network A phase voltage is through overvoltage sensor, link to each other with the zero passage comparator circuit by the one-channel signal line, the output of AD data acquisition module and zero passage comparator circuit connects DSP digital signal processing chip input port, and DSP digital signal processing chip output sampling frequency rate signal is to the AD data acquisition module.Problems such as the detection time-delay that has solved the humorous wave method of conventional current is big, the interference of electric current spine, can allow Active Power Filter-APF can detect mains by harmonics rapidly and accurately, carry out harmonic wave control and reactive-load compensation, greatly improved the power supply quality of electrical network to nonlinear load.
Preferred FLUKE 1760 power quality analyzers of harmonic wave pick-up unit, FLUKE 1760 power quality analyzers arrange parameter: sample window 200ms, no gap rolling analysis, get the mean value of 15 sample window analysis results per 3 seconds, provided 1 group of test result storage in per 1 minute, continuous recording 72 hours.
More than show and described ultimate principle of the present utility model and principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in above-described embodiment and the instructions just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (5)
1. device that the current harmonics quality is detected by the new mode of connection, comprise a harmonic wave pick-up unit, described harmonic wave pick-up unit is provided with data acquisition module, it is characterized in that, first port of described data acquisition module connects the transmission of electricity bus of substation transformer low-pressure side, and second port of described data acquisition module connects the load supply lines of substation transformer low-pressure side.
2. the device that the current harmonics quality is detected by the new mode of connection according to claim 1, it is characterized in that, first port of described data acquisition module is by the transmission of electricity bus of first mutual inductor connection substation transformer low-pressure side, and second port of described data acquisition module connects the load supply lines of substation transformer low-pressure side by second mutual inductor.
According to claim 2 by the new mode of connection to the device that the current harmonics quality detects, it is characterized in that described harmonic wave pick-up unit also is provided with a data analysis processing module, described data analysis processing module connects described data acquisition module.
According to claim 3 by the new mode of connection to the device that the current harmonics quality detects, it is characterized in that described harmonic wave pick-up unit also is provided with a human-computer interaction module, described human-computer interaction module connects described data analysis processing module.
According to claim 3 by the new mode of connection to the device that the current harmonics quality detects, it is characterized in that described harmonic wave pick-up unit also is provided with a wireless communication module, described wireless communication module connects described data analysis processing module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320156190 CN203133169U (en) | 2013-03-30 | 2013-03-30 | Device employing novel wiring method for detecting current harmonic quality |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320156190 CN203133169U (en) | 2013-03-30 | 2013-03-30 | Device employing novel wiring method for detecting current harmonic quality |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203133169U true CN203133169U (en) | 2013-08-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320156190 Expired - Lifetime CN203133169U (en) | 2013-03-30 | 2013-03-30 | Device employing novel wiring method for detecting current harmonic quality |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203133169U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104360153A (en) * | 2014-10-22 | 2015-02-18 | 江苏省电力公司淮安供电公司 | Method for detecting and analyzing harmonic waves of power grids in online manner |
-
2013
- 2013-03-30 CN CN 201320156190 patent/CN203133169U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104360153A (en) * | 2014-10-22 | 2015-02-18 | 江苏省电力公司淮安供电公司 | Method for detecting and analyzing harmonic waves of power grids in online manner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130814 |