CN106338650A - Harmonic wave measurement circuit - Google Patents
Harmonic wave measurement circuit Download PDFInfo
- Publication number
- CN106338650A CN106338650A CN201610921593.4A CN201610921593A CN106338650A CN 106338650 A CN106338650 A CN 106338650A CN 201610921593 A CN201610921593 A CN 201610921593A CN 106338650 A CN106338650 A CN 106338650A
- Authority
- CN
- China
- Prior art keywords
- circuit
- digital signal
- signal processor
- harmonic
- analog
- 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
- 238000005259 measurement Methods 0.000 title abstract 2
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 12
- 238000012545 processing Methods 0.000 claims description 12
- 238000005070 sampling Methods 0.000 claims description 8
- 230000004075 alteration Effects 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 2
- 230000009466 transformation Effects 0.000 claims description 2
- 230000001360 synchronised effect Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/16—Spectrum analysis; Fourier analysis
Landscapes
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- General Physics & Mathematics (AREA)
- Electric Clocks (AREA)
Abstract
The invention discloses a harmonic wave measurement circuit which comprises a digital signal processor circuit; a micro mutual inductor array circuit; an analog-digital converter circuit communicated and connected respectively with the digital signal processor circuit and the micro mutual inductor array circuit, the micro mutual inductor array circuit isolating and converting the voltage and current of a power grid into secondary voltage analog signals which are sent to the analog-digital converter circuit where they are converted into secondary voltage digital signals and then sent to the digital signal processor circuit for rapid fundamental and harmonic calculation; a real time clock circuit connected with the digital signal processor circuit; a liquid crystal display communicated and connected with the digital signal processor circuit; and a button array connected with the digital signal processor circuit to set of the mutual inductor and to adjust the real time clock. According to the invention, an operational amplifier is not used, but rather a single positive power supply is used. Due to the reduced number of components, the circuit has a smaller size, consumes less power, becomes cost effective to manufacture and provide reliable performance.
Description
Technical field
A kind of the present invention relates to quality of power supply technical field, it is more particularly related to harmonic measure circuit.
Background technology
Electric energy is the energy being easiest to transmit, control and utilize, the widely used exchange way of current electrical energy transportation, and waveform is
Sine wave, electrical equipment typically powers to design by sine wave, when the waveform of power supply contains harmonic wave, gently then electrical equipment
Performance will decline, heavy then break down, or even cause disastrous accident.In real time and accurately measure mains by harmonics and contain
Amount, to Regulation, the optimization of electrical equipment, the Treatment design of load are all significant.
Harmonic measure is divided into off-line type and online two kinds.Off-line type is first the waveform of electrical network using data acquisition unit
After gathering and storing, then harmonic wave is calculated using general purpose computer.This mode is commonly used in last century, and reason is micro- at that time
The degraded performance of processor is it is impossible to complete quickly to process.Online is high speed performance using digital processing unit, after collection immediately
Calculate, substantially moment completes, and meets requirement of real-time.
Domestic at present high performance online harmonic measure instrument is usually the U.S., Israel, Japan and other countries production,
Price is sufficiently expensive.Domestic manufacturer produces harmonic measuring instrument, and its technical scheme is that transformer, operational amplifier, simulation numeral turn
Parallel operation, digital signal processor or programming device, due to being used for processing bipolar signal in addition it is also necessary to join using operational amplifier
Put the dual power supply of Symmetrical, therefore component number is many, volume is big, high cost, power consumption are high and reliability is low.
Content of the invention
For weak point present in technique scheme, the present invention provides a kind of harmonic measure circuit, eliminates fortune
Calculate amplifier, powered using single positive supply, component number minimizing, volume reduction, lower power consumption, cost decline, reliability
Improve.
In order to realize according to object of the present invention and further advantage, the present invention is achieved through the following technical solutions:
The present invention provides a kind of harmonic measure circuit, comprising:
Digital signal processor circuit；
Micro mutual inductor array circuit；
Analog-digital converter circuit, it is connected respectively to described digital signal processor circuit and described micro mutual inductor
Array circuit；The voltage of electrical network, electric current are individually insulated and are converted to secondary voltage simulation letter by described micro mutual inductor array circuit
Number it is sent to described analog-digital converter circuit；The described secondary voltage receiving is simulated by described analog-digital converter circuit
Signal is converted into secondary voltage digital signal and is sent to described digital signal processor circuit to carry out the quick of fundamental wave harmonic
Calculate；
Real time clock circuit, it is connected to described digital signal processor circuit,
Liquid crystal display, it is connected to described digital signal processor circuit；
Array of buttons, it is connected to described digital signal processor circuit, to set the no-load voltage ratio of transformer, is also used for adjusting
Real-time clock.
Preferably, the parameter processing of the fundamental wave harmonic of described digital signal processor circuit includes calculating fundamental wave frequency
The numerical value of rate, fundamental wave, harmonic wave, harmonic content and aberration rate.
Preferably, the parameter processing of the fundamental wave harmonic of described digital signal processor circuit includes becoming using Fourier
Change to calculate the numerical value of fundamental frequency, fundamental wave, harmonic wave, harmonic content and aberration rate.
Preferably, described real time clock circuit provide year, month, day, when and minute signal time coordinate.
Preferably, described analog-digital converter circuit adopts the dsp chip tms320f28335 of 32.
Preferably, described analog-digital converter circuit adopts 16 bit synchronization Middle Sampling Analog Digital converter chips
max11049；Described analog-digital converter chip max11049 is directly connected to described micro mutual inductor array circuit.
Preferably, the display mode of described liquid crystal display shows for pair of pages.
The present invention at least includes following beneficial effect:
The present invention provide harmonic measure circuit, the analog-digital converter chip of analog-digital converter circuit with miniature
Transformer array circuit is directly connected to, and eliminates the operational amplifier for signal condition, signal condition is by Digital Signal Processing
The software section of device circuit completes；And powered using single positive supply, reduce the requirement to power supply, so that the number of components and parts
Amount significantly reduce, volume reductions, lower power consumption, cost decline, also improve reliability simultaneously.
Part is embodied by the further advantage of the present invention, target and feature by description below, and part also will be by this
Invention research and practice and be understood by the person skilled in the art.
Brief description
Fig. 1 is the connection diagram of harmonic measure circuit of the present invention；
Fig. 2 is the catenation principle figure of liquid crystal display of the present invention and digital signal processor circuit chip；
Fig. 3 is that analog-digital converter circuit of the present invention is believed with micro mutual inductor array circuit and numeral respectively
The schematic diagram that number processor circuit connects；
Fig. 4 is the master control block diagram of the present invention；
Fig. 5 is sampling and the computing block diagram of the present invention；
Fig. 6 is the parameter setting block diagram of the present invention；
In figure:
10- digital signal processor circuit；20- micro mutual inductor array circuit；30- analog-digital converter circuit；40-
Real time clock circuit；50- liquid crystal display；60- array of buttons.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings, in order to those skilled in the art with reference to description
Word can be implemented according to this.
It should be appreciated that used herein such as " have ", "comprising" and " inclusion " term do not allot one or many
The presence of individual other element or a combination thereof or interpolation.
As shown in Figure 1 to Figure 3, the present invention provides a kind of harmonic measure circuit, comprising:
Digital signal processor circuit 10；
Micro mutual inductor array circuit 20；
Analog-digital converter circuit 30；It is connected respectively to digital signal processor circuit 10 and micro mutual inductor array
Circuit 20；The voltage of electrical network, electric current are individually insulated and are converted to secondary voltage analogue signal and send out by micro mutual inductor array circuit 20
Give analog-digital converter circuit 30；The secondary voltage analogue signal of reception is converted into two by analog-digital converter circuit 30
Secondary voltage digital signal is sent to digital signal processor circuit 10 to carry out the quick calculating of fundamental wave harmonic；
Real time clock circuit 40, it is connected to digital signal processor circuit 10,
Liquid crystal display 50, it is connected to digital signal processor circuit 10；And
Array of buttons 60, it is connected to digital signal processor circuit 10, to set the no-load voltage ratio of transformer, is also used for adjusting
Real-time clock.
In above-mentioned embodiment, digital signal processor circuit 10 adopts the dsp chip tms320f28335 of 32, in figure
In be masked as ic2.As a kind of specific embodiment, the parameter processing of the fundamental wave harmonic of digital signal processor circuit 10
Including the numerical value calculating fundamental frequency, fundamental wave, harmonic wave, harmonic content and aberration rate.As further embodiment,
The parameter processing of the fundamental wave harmonic of digital signal processor circuit 10 includes adopting Fourier transformation to calculate fundamental frequency, base
The numerical value of ripple, harmonic wave, harmonic content and aberration rate.
Micro mutual inductor array circuit 20 is made up of 3 Micro-Transformer of Voltages and 3 micro-transformer of current.
Analog-digital converter circuit 30 adopts 16 bit synchronization Middle Sampling Analog Digital converter chip max11049, in figure
It is masked as ic3；Analog-digital converter chip max11049 is connected with micro mutual inductor array circuit 20 direction communication.
Real time clock circuit 40 adopts 1 rx8025t real-time timepiece chip, is masked as ic4 in figure；Real time clock circuit
40 be used for provide year, month, day, when and minute signal time coordinate.
Array of buttons 60 is made up of 4 inching buttons s1, s2, s3 and s4.
Liquid crystal display 50, the fundamental wave frequency obtaining after quickly being calculated through digital signal processor circuit 10 for display
The numerical value of rate, fundamental wave, harmonic wave, harmonic content and aberration rate.Preferably, the display mode of liquid crystal display 50 shows for pair of pages
Show, that is, fundamental wave numerical value harmonic numerical value Pagination Display is on liquid crystal display 50.
The present invention provide harmonic measure circuit, the analog-digital converter chip of analog-digital converter circuit 30 with micro-
Type transformer array circuit 20 is directly connected to, and eliminates traditional analog-digital converter circuit 30 and micro mutual inductor array electricity
Connected by the operational amplifier for signal condition between road 20, signal condition is by the software of digital signal processor circuit 10
It is partially completed；And powered using single positive supply, so that the quantity of components and parts significantly reduces, volume reduction, lower power consumption, one-tenth
This decline, also improves reliability simultaneously.
Because line voltage, electric current are the signals of Fast transforms, so adopting interrupt mode, provide with reference to the present invention
Harmonic measure circuit, illustrate digital signal processor circuit 10 the main control process of dsp chip tms320f28335 and
The processing procedure of intervalometer Interruption.
1., referring to Fig. 4, the master control process of dsp chip is as follows:
(1) energising runs；
(2) system initialization, including system operation frequency, external memory interface, the setting of general gpio attribute etc., forbids
Interrupt；
(3) read the parameter of storage, including each cycle sampling number ns, the highest number of times v of harmonic wave that need to calculate；
(4) enable and interrupt；
(5) generation to be interrupted such as, if any interrupting occurring, enters (6)；Otherwise, continue waiting for.
(6) call corresponding interrupt service routine.
2., referring to Fig. 5, the processing procedure of intervalometer 1 Interruption of dsp chip is as follows:
(7) sample ordinal number s=s+1, for judging what whether the sampling in the complete cycle completed；
(8) start ad sample conversion；
(9) being judged by reading the level of special pin, whether conversion completes, if completed, reading the knot of ad conversion
Really；Otherwise wait for；
(10) read ad data；
(11) judge s > ns？Judge whether the sampling of complete cycle completes.If completed, enter (12)；Do not complete, then return
Return；
(12) then execute Fourier Tranform analysis program, calculate the numerical value of fundamental wave and each harmonic and be shown in liquid crystal
Show device；
(13) sampling ordinal number resets, and for next integer-period sampled preparation, returns.
3., referring to Fig. 6, the processing procedure of the timer 2 Interruption of the dsp chip scanning to array of buttons is as follows:
(14) read button sequence number；
(15) if singly-bound, enter (16)；If not singly-bound, return；
(16) change the value of parameter, including page flip, cursor is mobile, parameter increases, parameter reduces；
(17) judge whether parameter exceeds zone of reasonableness, if rationally, enter (18) if unreasonable, enter (18)；
(18) provide prompting, be then return to (16)；
(19) undated parameter preserving.
Although embodiment of the present invention is disclosed as above, it is not restricted to listed in description and embodiment
With.It can be applied to various suitable the field of the invention completely.Can be easily for those skilled in the art
Realize and changed.Therefore under the general concept being limited without departing substantially from claim and equivalency range, the present invention is not
It is limited to specific details and shown here as the legend with description.
Claims (7)
1. a kind of harmonic measure circuit is it is characterised in that include:
Digital signal processor circuit；
Micro mutual inductor array circuit；
Analog-digital converter circuit；It is connected respectively to described digital signal processor circuit and described micro mutual inductor array
Circuit；The voltage of electrical network, electric current are individually insulated and are converted to secondary voltage analogue signal and send out by described micro mutual inductor array circuit
Give described analog-digital converter circuit；The described secondary voltage analogue signal that described analog-digital converter circuit will receive
It is converted into secondary voltage digital signal and be sent to described digital signal processor circuit to carry out the quick calculating of fundamental wave harmonic；
Real time clock circuit, it is connected to described digital signal processor circuit；
Liquid crystal display, it is connected to described digital signal processor circuit；
Array of buttons, it is connected to described digital signal processor circuit, to set the no-load voltage ratio of transformer, is also used for adjusting in real time
Clock.
2. harmonic measure circuit as claimed in claim 1 it is characterised in that the fundamental wave of described digital signal processor circuit and
The parameter processing of harmonic wave includes calculating fundamental frequency, fundamental wave, the numerical value of harmonic wave, harmonic content and aberration rate.
3. harmonic measure circuit as claimed in claim 2 it is characterised in that the fundamental wave of described digital signal processor circuit and
The parameter processing of harmonic wave includes adopting Fourier transformation to calculate fundamental frequency, fundamental wave, harmonic wave, harmonic content and aberration rate
Numerical value.
4. harmonic measure circuit as claimed in claim 1 it is characterised in that
Described real time clock circuit provide year, month, day, when and minute signal time coordinate.
5. harmonic measure circuit as claimed in claim 1 it is characterised in that
Described analog-digital converter circuit adopts the dsp chip tms320f28335 of 32.
6. harmonic measure circuit as claimed in claim 1 is it is characterised in that described analog-digital converter circuit adopts 16
Synchronized sampling analog-digital converter chip max11049；Described analog-digital converter chip max11049 is miniature mutual with described
Sensor array circuit direction communication connects.
7. harmonic measure circuit as claimed in claim 1 is it is characterised in that the display mode of described liquid crystal display is pair of pages
Display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610921593.4A CN106338650A (en) | 2016-10-21 | 2016-10-21 | Harmonic wave measurement circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610921593.4A CN106338650A (en) | 2016-10-21 | 2016-10-21 | Harmonic wave measurement circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106338650A true CN106338650A (en) | 2017-01-18 |
Family
ID=57839701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610921593.4A Pending CN106338650A (en) | 2016-10-21 | 2016-10-21 | Harmonic wave measurement circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106338650A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109061301A (en) * | 2018-10-25 | 2018-12-21 | 程海明 | A kind of novel electric power system m-Acetyl chlorophosphonazo detection device |
| CN109149569A (en) * | 2018-09-14 | 2019-01-04 | 国网安徽省电力有限公司培训中心 | A kind of voltage based on network system and amperometry processing system |
| CN113219246A (en) * | 2021-05-31 | 2021-08-06 | 深圳信测标准技术服务股份有限公司 | Detection method for detecting power amplifier harmonic intensity detection device |
| CN117330834A (en) * | 2023-10-09 | 2024-01-02 | 国网山东省电力公司东营市东营区供电公司 | Dual-sampling-based power grid harmonic content testing method and system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201233427Y (en) * | 2008-07-04 | 2009-05-06 | 广东东方电讯科技有限公司 | Multifunction electric energy meter |
| CN201489053U (en) * | 2009-07-23 | 2010-05-26 | 安徽新力电网技术发展有限责任公司 | Digital intelligent harmonic electric energy meter |
| CN201637783U (en) * | 2009-09-23 | 2010-11-17 | 镇江中茂电子科技有限公司 | Harmonic wave detection device |
| CN203376400U (en) * | 2013-05-16 | 2014-01-01 | 湖南大学 | Harmonic wave time-frequency characteristic parameter analyzer |
| CN203502493U (en) * | 2013-09-12 | 2014-03-26 | 国家电网公司 | Power harmonic real-time detection system based on phase-locked loop |
| CN103852637A (en) * | 2014-04-04 | 2014-06-11 | 唐山紫光智能电子有限公司 | Intelligent electric meter with fundamental wave metering function and measurement method thereof |
| CN204347150U (en) * | 2014-09-25 | 2015-05-20 | 上海电力学院 | Responsive household electrical appliance harmonic wave immunity to interference test platform |
| CN206235665U (en) * | 2016-10-21 | 2017-06-09 | 国网安徽省电力公司培训中心 | A kind of harmonic measure circuit |
-
2016
- 2016-10-21 CN CN201610921593.4A patent/CN106338650A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201233427Y (en) * | 2008-07-04 | 2009-05-06 | 广东东方电讯科技有限公司 | Multifunction electric energy meter |
| CN201489053U (en) * | 2009-07-23 | 2010-05-26 | 安徽新力电网技术发展有限责任公司 | Digital intelligent harmonic electric energy meter |
| CN201637783U (en) * | 2009-09-23 | 2010-11-17 | 镇江中茂电子科技有限公司 | Harmonic wave detection device |
| CN203376400U (en) * | 2013-05-16 | 2014-01-01 | 湖南大学 | Harmonic wave time-frequency characteristic parameter analyzer |
| CN203502493U (en) * | 2013-09-12 | 2014-03-26 | 国家电网公司 | Power harmonic real-time detection system based on phase-locked loop |
| CN103852637A (en) * | 2014-04-04 | 2014-06-11 | 唐山紫光智能电子有限公司 | Intelligent electric meter with fundamental wave metering function and measurement method thereof |
| CN204347150U (en) * | 2014-09-25 | 2015-05-20 | 上海电力学院 | Responsive household electrical appliance harmonic wave immunity to interference test platform |
| CN206235665U (en) * | 2016-10-21 | 2017-06-09 | 国网安徽省电力公司培训中心 | A kind of harmonic measure circuit |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109149569A (en) * | 2018-09-14 | 2019-01-04 | 国网安徽省电力有限公司培训中心 | A kind of voltage based on network system and amperometry processing system |
| CN109149569B (en) * | 2018-09-14 | 2023-01-31 | 国网安徽省电力有限公司培训中心 | Voltage and current analysis processing system based on power grid system |
| CN109061301A (en) * | 2018-10-25 | 2018-12-21 | 程海明 | A kind of novel electric power system m-Acetyl chlorophosphonazo detection device |
| CN113219246A (en) * | 2021-05-31 | 2021-08-06 | 深圳信测标准技术服务股份有限公司 | Detection method for detecting power amplifier harmonic intensity detection device |
| CN113219246B (en) * | 2021-05-31 | 2022-02-22 | 深圳信测标准技术服务股份有限公司 | Detection method for detecting power amplifier harmonic intensity detection device |
| CN117330834A (en) * | 2023-10-09 | 2024-01-02 | 国网山东省电力公司东营市东营区供电公司 | Dual-sampling-based power grid harmonic content testing method and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106338650A (en) | Harmonic wave measurement circuit | |
| CN201352235Y (en) | Three-phase multifunctional electric energy meter | |
| CN100557449C (en) | Multifunctional tester | |
| CN101876693A (en) | Electric energy metering chip-based terminal calibration system | |
| CN201845051U (en) | Three-phase intelligent electric energy meter | |
| CN203786168U (en) | Three-phase high-precision multifunctional electric energy meter | |
| CN102931657A (en) | Measuring and calculating device for line loss of power distribution network | |
| CN101561454A (en) | Power quality analyzer | |
| CN201796138U (en) | Terminal calibration system based on electric energy measuring chip | |
| CN203191430U (en) | Multifunctional electric power parameter display instrument based on DSP | |
| CN206235665U (en) | A kind of harmonic measure circuit | |
| CN202305666U (en) | Direct current electric energy meter | |
| CN209707590U (en) | A kind of three phase dynamic harmonic electric energy meter apparatus | |
| CN204008846U (en) | A kind of transformer station primary and secondary table maximum demand synchronous measurement device | |
| CN216145101U (en) | Double-channel high-speed data playback device | |
| CN203069643U (en) | Multiple variable bandwidth digital storage oscilloscope | |
| CN105222846B (en) | The implementation method of Intelligent water meter of Internet of things ladder valuation | |
| CN202906466U (en) | Measuring and calculating device for line loss of power distribution network | |
| CN202661546U (en) | Electric energy data acquisition device based on double central processing units (CPU) | |
| CN204177955U (en) | The self-service calibrating installation of a kind of three-phase electric energy meter based on man-machine touth-interactive | |
| CN203827066U (en) | Power data center management system | |
| CN101271139A (en) | High-precision switching value detecting instrument and detecting method | |
| CN201689133U (en) | Electric energy quality monitoring device | |
| CN202886515U (en) | Line loss concentrator | |
| CN105139532B (en) | Remote-control intelligent water meter with ladder valuation functions |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170118 |
|
| RJ01 | Rejection of invention patent application after publication |