CN206627576U - A kind of power quality analyzer - Google Patents
A kind of power quality analyzer Download PDFInfo
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- CN206627576U CN206627576U CN201720308961.8U CN201720308961U CN206627576U CN 206627576 U CN206627576 U CN 206627576U CN 201720308961 U CN201720308961 U CN 201720308961U CN 206627576 U CN206627576 U CN 206627576U
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- filter circuit
- power quality
- quality analyzer
- gate array
- programmable gate
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Abstract
The utility model belongs to power quality analysis technical field, discloses a kind of power quality analyzer, including：Voltage measurement structure, the first filter circuit, current measure structure, the second filter circuit, frequency tracking module, modulus conversion chip, field programmable gate array, arm processor, liquid crystal display and button module；The voltage measurement structure is connected by first filter circuit with the modulus conversion chip；The current measure structure is connected by second filter circuit with the modulus conversion chip；The modulus conversion chip is connected with the field programmable gate array；First filter circuit is connected by field programmable gate array described in the frequency tracking module；The field programmable gate array is connected with the arm processor；The arm processor is connected with the liquid crystal display and button module respectively.The utility model provides a kind of power quality analyzer of high accuracy and reliability.
Description
Technical field
Power quality analysis technical field is the utility model is related to, more particularly to a kind of power quality analyzer.
Background technology
With the development of Power Electronic Technique, direct current transportation, high-power single-phase commutation technique are set in industrial department and electricity consumption
Standby to be above widely used, the application such as on railway, these cause current waveform distortion and three-phase imbalance getting worse.
In power network, three-phase load unbalance, power system resonance grounding etc. can produce negative phase-sequence, the meeting such as power rectifier and non-linear equipment
Produce harmonic wave.Negative phase-sequence harmonic has had a strong impact on power supply quality.
The country starts late for quality of power supply research, there is the research work that scientific research institutions start harmonic wave the eighties in last century
Make, then there is the R and D work that some companies start to be directed to electric energy quality detection device, and achieve it is certain into
Fruit.But in general, measurement accuracy also has larger gap compared with international most advanced level；Man-machine interface is simple and crude, and operating experience is poor；Do not have
The detection function of transient voltage, simple in construction, function is single.
Utility model content
The utility model provides a kind of power quality analyzer, and power quality analysis precision is low in the prior art for solution, people
Machine is cumbersome, poor anti jamming capability, the low technical problem of sample frequency.
In order to solve the above technical problems, the utility model provides a kind of power quality analyzer, including：Voltage measurement knot
Structure, the first filter circuit, current measure structure, the second filter circuit, frequency tracking module, modulus conversion chip, scene can compile
Journey gate array, arm processor, liquid crystal display and button module；
The voltage measurement structure is connected by first filter circuit with the modulus conversion chip；The electric current is surveyed
Amount structure is connected by second filter circuit with the modulus conversion chip；
The modulus conversion chip is connected with the field programmable gate array；
First filter circuit is connected by field programmable gate array described in the frequency tracking module；
The field programmable gate array is connected with the arm processor；
The arm processor is connected with the liquid crystal display and button module respectively.
Further, the frequency tracking module includes：Frequency tracking circuit；
The frequency tracking circuit is connected with first filter circuit and the field programmable gate array respectively.
Further, the modulus conversion chip uses AD7606 synchronized sampling modulus data acquisition chips.
Further, first filter circuit and second filter circuit use second order active low pass filter.
Further, the voltage measurement structure includes：Voltage transformer；
The voltage transformer is connected with first filter circuit.
Further, the quantity of the voltage transformer is two or more.
Further, the current measure structure includes：Current transformer；
The current transformer and second filter circuit.
Further, the quantity of the current transformer is two or more.
Further, the analyzer also includes：Ethernet interface；
The Ethernet interface is connected with the arm processor.
Further, the analyzer also includes：Wireless communication module；
The wireless communication module is connected with the arm processor.
The one or more technical schemes provided in the embodiment of the present application, have at least the following technical effects or advantages：
The power quality analyzer provided in the embodiment of the present application, field programmable gate array is cooperateed with using arm processor
Framework, field programmable gate array control modulus conversion chip carries out data acquisition and data analysis, complicated interpersonal interaction
Realized with communication function by arm processor, operating efficiency and simple operation so as to lifting device.The outfit pair of present apparatus passage
The filter circuit answered, frequency alias phenomenon is eliminated, so as to ensure that the accuracy of survey calculation on hardware.The present apparatus is all logical
Road synchronized sampling, it ensure that uniformity of all passages in synchronization sampled point.The technology overcomes conventional phase locked loops synchronization
Tracking velocity is slow existing for Sampling techniques, the defects such as frequency is low, is realized while fast dynamic response is ensured same at a high speed
Step sampling, eliminates the accumulated phase error of phase lock circuitry, improves analytical performance and precision.
Further, the present apparatus uses high precision analogue conversion chip, coordinates the sampling of multi-channel high frequency rate to realize height
Voltage, current measurement precision.
Further, the present apparatus is equipped with single second order active low pass filter per passage, is cut in the range of normal range
Only frequency is 14KHz, and cut-off frequency is 22KHz in full range, complies fully with quality of power supply input reference signal, so as to
The accuracy of survey calculation is ensure that on hardware.
Brief description of the drawings
Fig. 1 is power quality analyzer structural representation provided by the utility model.
Embodiment
The embodiment of the present application solves power quality analysis precision in the prior art by providing a kind of power quality analyzer
Low, human-machine operation is cumbersome, poor anti jamming capability, the low technical problem of sample frequency；Improving measurement accuracy, anti-interference energy are reached
The technique effect of power and sample frequency.
In order to be better understood from above-mentioned technical proposal, below in conjunction with Figure of description and specific embodiment to upper
State technical scheme to be described in detail, it should be understood that the specific features in the utility model embodiment and embodiment are to this Shen
Please technical scheme detailed description, rather than the restriction to technical scheme, in the case where not conflicting, the application is real
Applying the technical characteristic in example and embodiment can be mutually combined.
Referring to Fig. 1, a kind of power quality analyzer, including：Voltage measurement structure, the first filter circuit, current measurement knot
Structure, the second filter circuit, frequency tracking module, modulus conversion chip, field programmable gate array, arm processor, liquid crystal display
Device and button module；
The voltage measurement structure is connected by first filter circuit with the modulus conversion chip；The electric current is surveyed
Amount structure is connected by second filter circuit with the modulus conversion chip；
The modulus conversion chip is connected with the field programmable gate array；
First filter circuit is connected by field programmable gate array described in the frequency tracking module；
The field programmable gate array is connected with the arm processor；
The arm processor is connected with the liquid crystal display and button module respectively.
Specifically, the voltage measurement structure includes：Voltage transformer；The voltage transformer and the described first filtering
Circuit is connected；The quantity of the voltage transformer is two or more.
Similar, the current measure structure includes：Current transformer；The current transformer and second filtered electrical
Road；The quantity of the current transformer is two or more.
So as to realize multi-channel measurement, abundant improving measurement accuracy.
At work, 220V AC signals are transformed into 2.5V small-signals by voltage transformer, and current transformer exchanges 5V
Signal is transformed into 2.5V small-signals, inputs to filter circuit.Prime input signal is filtered by filter circuit, and filter high-frequency is done
Signal is disturbed, inputs to modulus conversion chip.Field programmable gate array is connected by parallel port with modulus conversion chip, internal processes
Control modulus conversion chip to carry out data acquisition, and read analog-digital conversion result.Frequency tracking circuit turns sine wave signal
Become square-wave signal, input to field programmable gate array.Field programmable gate array enters according to the analog-digital conversion result of reading
Row calculates, and can obtain virtual value, harmonic wave, flickering, voltage swell, etc. data, by spi bus transfers to arm processor.
Arm processor possesses crystal display, can check result of calculation by keypress function.
Further, the frequency tracking module includes：Frequency tracking circuit；The frequency tracking circuit respectively with it is described
First filter circuit is connected with the field programmable gate array.All Channel Synchronous samplings, ensure that all passages same
The uniformity of instance sample point.It is slow that the technology overcomes tracking velocity existing for conventional phase locked loops synchronous sampling technique, frequency
Low defect, high-speed synchronous sampling is realized while fast dynamic response is ensured, eliminate the accumulated phase of phase lock circuitry
Error, improve analytical performance.
Further, the modulus conversion chip uses AD7606 synchronized sampling modulus data acquisition chips.That is, using 16
Position high precision analogue conversion chip, sample rates of the 200KHz per passage, highest 4096 sampled point cycles of offer, guarantee voltage,
Current measurement precision is more than 0.1%.
Further, first filter circuit and second filter circuit use second order active low pass filter.This
Device is equipped with single frequency overlapped-resistable filter, i.e. second order active low pass filter, the cutoff frequency in the range of normal range per passage
Rate is 14KHz, and cut-off frequency is 22KHz in full range, complies fully with quality of power supply input reference signal, so as to hard
The accuracy of survey calculation is ensure that on part.
Further, the analyzer also includes：Ethernet interface；The Ethernet interface and the arm processor phase
Even.Or the analyzer also includes：Wireless communication module；The wireless communication module is connected with the arm processor.ARM
Result of calculation can be transmitted to distant place main website by processor by Ethernet interface or wireless communication module；Realize remote power
Quality analysis.
The one or more technical schemes provided in the embodiment of the present application, have at least the following technical effects or advantages：
The power quality analyzer provided in the embodiment of the present application, field programmable gate array is cooperateed with using arm processor
Framework, field programmable gate array control modulus conversion chip carries out data acquisition and data analysis, complicated interpersonal interaction
Realized with communication function by arm processor, operating efficiency and simple operation so as to lifting device.The outfit pair of present apparatus passage
The filter circuit answered, frequency alias phenomenon is eliminated, so as to ensure that the accuracy of survey calculation on hardware.The present apparatus is all logical
Road synchronized sampling, it ensure that uniformity of all passages in synchronization sampled point.The technology overcomes conventional phase locked loops synchronization
Tracking velocity is slow existing for Sampling techniques, the defects such as frequency is low, is realized while fast dynamic response is ensured same at a high speed
Step sampling, eliminates the accumulated phase error of phase lock circuitry, improves analytical performance and precision.The present apparatus uses high precision analogue
Conversion chip, the sampling of multi-channel high frequency rate is coordinated to realize high voltage, current measurement precision.The present apparatus is equipped with independent per passage
Second order active low pass filter, cut-off frequency is 14KHz in the range of normal range, and cut-off frequency is in full range
22KHz, quality of power supply input reference signal is complied fully with, so as to ensure that the accuracy of survey calculation on hardware.This project
Product uses the synchronous sampling technique based on digital servo-control, 16 high-speed a/d converters, is 128 points/week per channel sample frequency
Ripple, it can comprehensively and effectively reflect the running situation of power network.Traditional electric energy quality monitoring simply makes in each transformer terminal
With pseudo-terminal, mains by harmonics and frequency monitoring are carried out to transformer and large user's circuit, the data of power network fluctuation are only capable of
It is enough to be sent to Surveillance center when there is relatively fluctuation on a large scale, and a variety of power quality datas in power network are adopted
Collection is not accurate enough and real-time, and this Project Product uses data acquisition back end, solves above mentioned problem well, can be to these electricity
Energy qualitative data in real time, accurately gather.This Project Product employs online programmable maintenance technology, extensive special collection
Into circuit, multi-layer sheet and surface mount process, greatly improve level of integrated system, more securely and reliably.Can be in real time to product
Development process realize that software version on-line maintenance upgrades, guarantee system can continuously work.In voltage-stabilized power supply, isolating transformer
Rear side installs filter circuit；Lift antijamming capability.
It should be noted last that above embodiment is only illustrating the technical solution of the utility model rather than limit
System, although the utility model is described in detail with reference to example, it will be understood by those within the art that, can be right
The technical solution of the utility model is modified or equivalent substitution, without departing from the spirit and model of technical solutions of the utility model
Enclose, it all should cover among right of the present utility model.
Claims (10)
- A kind of 1. power quality analyzer, it is characterised in that including：Voltage measurement structure, the first filter circuit, current measurement knot Structure, the second filter circuit, frequency tracking module, modulus conversion chip, field programmable gate array, arm processor, liquid crystal display Device and button module；The voltage measurement structure is connected by first filter circuit with the modulus conversion chip；The current measurement knot Structure is connected by second filter circuit with the modulus conversion chip；The modulus conversion chip is connected with the field programmable gate array；First filter circuit is connected by the frequency tracking module with the field programmable gate array；The field programmable gate array is connected with the arm processor；The arm processor is connected with the liquid crystal display and button module respectively.
- 2. power quality analyzer as claimed in claim 1, it is characterised in that the frequency tracking module includes：Frequency with Track circuit；The frequency tracking circuit is connected with first filter circuit and the field programmable gate array respectively.
- 3. power quality analyzer as claimed in claim 1, it is characterised in that：The modulus conversion chip is same using AD7606 Step sampling modulus data acquisition chip.
- 4. power quality analyzer as claimed in claim 1, it is characterised in that：First filter circuit and second filter Wave circuit uses second order active low pass filter.
- 5. power quality analyzer as claimed in claim 1, it is characterised in that the voltage measurement structure includes：Voltage is mutual Sensor；The voltage transformer is connected with first filter circuit.
- 6. power quality analyzer as claimed in claim 5, it is characterised in that：The quantity of the voltage transformer be two with On.
- 7. power quality analyzer as claimed in claim 1, it is characterised in that the current measure structure includes：Electric current is mutual Sensor；The current transformer and second filter circuit.
- 8. power quality analyzer as claimed in claim 7, it is characterised in that：The quantity of the current transformer be two with On.
- 9. power quality analyzer as claimed in claim 1, it is characterised in that the analyzer also includes：Ethernet interface；The Ethernet interface is connected with the arm processor.
- 10. power quality analyzer as claimed in claim 1, it is characterised in that the analyzer also includes：Radio communication mold Block；The wireless communication module is connected with the arm processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720308961.8U CN206627576U (en) | 2017-03-27 | 2017-03-27 | A kind of power quality analyzer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720308961.8U CN206627576U (en) | 2017-03-27 | 2017-03-27 | A kind of power quality analyzer |
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| CN206627576U true CN206627576U (en) | 2017-11-10 |
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| CN201720308961.8U Active CN206627576U (en) | 2017-03-27 | 2017-03-27 | A kind of power quality analyzer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107677977A (en) * | 2017-11-18 | 2018-02-09 | 广西电网有限责任公司电力科学研究院 | A kind of long-distance monitoring method of portable electric energy mass-synchrometer |
-
2017
- 2017-03-27 CN CN201720308961.8U patent/CN206627576U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107677977A (en) * | 2017-11-18 | 2018-02-09 | 广西电网有限责任公司电力科学研究院 | A kind of long-distance monitoring method of portable electric energy mass-synchrometer |
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A power quality analyzer Effective date of registration: 20210706 Granted publication date: 20171110 Pledgee: Qingdao high technology financing Company limited by guarantee Pledgor: QINGDAO HIGH-TECH COMMUNICATION Co.,Ltd. Registration number: Y2021370010046 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230531 Granted publication date: 20171110 Pledgee: Qingdao high technology financing Company limited by guarantee Pledgor: QINGDAO HIGH-TECH COMMUNICATION CO.,LTD. Registration number: Y2021370010046 |