CN205941741U - Electrical power quality data collection system - Google Patents
Electrical power quality data collection system Download PDFInfo
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- CN205941741U CN205941741U CN201620891370.3U CN201620891370U CN205941741U CN 205941741 U CN205941741 U CN 205941741U CN 201620891370 U CN201620891370 U CN 201620891370U CN 205941741 U CN205941741 U CN 205941741U
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Abstract
The utility model provides an electrical power quality data collection system, the device include data acquisition module, data processing module and the data storage module of electricity connection in proper order, and signal receiver and field programmable gate array are connected respectively to analog to digital converter's both ends among the data processing module, field programmable gate array includes digital signal processor and first -in first -out memory, and analog to digital converter and first -in first -out memory are connected respectively to digital signal processor's both ends. The utility model provides an electrical power quality data collection system mends coded data according to carrying out the calculation of half -wave virtual value through digital signal processor and first -in first -out memory to the binary system, data that can make full use of gathered, and then signify the wave form signal better, but also can direct output measuring voltage, the half -wave virtual value of current signal, simplify the later stage and to sample data's processing procedure, improve the real -time, the output result has the practicality more, and then is convenient for the trouble and records the ripples.
Description
Technical field
This utility model is related to quality of power supply technical field, more specifically, is related to power quality data harvester.
Background technology
The quality of power supply of power system concerns the safety and economic operation of whole system, and the quality of power supply of modern power systems is asked
Topic generally comprises the transient power quality problem such as harmonic wave, voltage swells and voltage dip.Frequently voltage swells and voltage dip
The malfunction of system protection switch can be led to, and then lead to the damage of system equipment and the safe handling of system, can lead when more serious
Cause the normal power supply to user, bring more serious economic loss.
Need when the quality of power supply of power system occurs abnormal to carry out recording ripple with regard to fault, and then fault is analyzed.Electricity
The setting purpose of pressure failure wave-recording start-up criterion is when voltage/quality of power supply event occurs, and by start-up criterion, accurately judges
The generation of quality of power supply event simultaneously starts digital recording wave device in time, records the magnitude of voltage in this event procedure.In actual electricity
In Force system, oscillograph working environment is easily subject to noise jamming, and the therefore result of determination of start-up criterion may produce mistake, enter
And lead to quality of power supply event not record or misdescription record.Failing to recording quality of power supply event in time, it will lose related
Voltage data, is unfavorable for the analysis in later stage；If error logging does not occur the voltage data of quality of power supply event period, not only can
Increase oscillograph memory space pressure, also can increase the workload of post analysis, the analysis of impact fault judges.
At present, the data processing module in power quality data harvester is mainly to one when processing waveform virtual value
The waveshape signal in individual cycle is acquired, and calculates the virtual value in this cycle, obtain after the calculating in multiple cycles one group discrete
Data, and then discrete data is exported, is obtained effective Value Data of waveshape signal.However, above-mentioned quality of power supply number
Fail sampled data is made full use of according to harvester, and the data amount check of obtained discrete virtual value is less, because
And it is impossible to characterize waveshape signal well.
Utility model content
The purpose of this utility model is to provide power quality data harvester, solves the existing electric energy described in background technology
Quality data collection device can not characterize the problem of waveshape signal well.
In order to solve above-mentioned technical problem, this utility model provides following technical scheme：
Power quality data harvester, described power quality data harvester includes the data acquisition being sequentially connected electrically
Module, data processing module data memory module, wherein,
Described data acquisition module includes signal receiver；
Described data processing module includes analog-digital converter and field programmable gate array, described Analog-digital Converter
The two ends of device connect described signal receiver and described field programmable gate array respectively；
Described field programmable gate array includes digital signal processor and push-up storage, at described digital signal
The two ends of reason device connect described analog-digital converter and described push-up storage respectively；
Described data memory module includes static RAM, described static RAM and described elder generation
Enter first to go out memorizer and be connected.
Preferably, described data processing module also includes low pass filter, described low pass filter respectively with described signal
Receptor is connected with described analog-digital converter.
Preferably, described field programmable gate array also includes static RAM controller, described static with
Machine access Memory Controller connects described push-up storage and described static RAM respectively.
Preferably, described data acquisition module also includes voltage follower, and described voltage follower connects described letter respectively
Number receptor and described low pass filter.
Preferably, described analog-digital converter is the analog-digital converter of 16bit precision.
This utility model provides a kind of power quality data harvester, and described power quality data harvester includes
The data acquisition module that is sequentially connected electrically, data processing module data memory module, wherein, described data acquisition module includes
Signal receiver；Described data processing module includes analog-digital converter and field programmable gate array, described simulation numeral
The two ends of transducer connect described signal receiver and described field programmable gate array respectively；Described field programmable gate array
Including digital signal processor and push-up storage, the two ends of described digital signal processor connect described simulation number respectively
Word transducer and described push-up storage；Described data memory module includes static RAM, described static state
Random access memory is connected with described push-up storage.The power quality data harvester that this utility model provides
Waveshape signal is received by the signal receiver in data acquisition module, received waveshape signal is through data processing module
In analog-digital converter be converted to complement of two's two's complement data, and then by the digital signal in field programmable gate array at
Reason device and push-up storage carry out the calculating of half-wave virtual value to complement of two's two's complement data, obtain equivalent voltage value, gained
To equivalent voltage value store the static RAM in data memory module.Main frame is transferred static random-access and is deposited
Equivalent voltage value in reservoir, and show waveform, thus judging that whether voltage pulsation exceeds critical field, and then determine whether
Start record ripple.In the power quality data harvester that this utility model provides, by digital signal processor and advanced elder generation
Go out the calculating that memorizer carries out half-wave virtual value to complement of two's two's complement data, collected data can be made full use of, and then
Preferably characterize waveshape signal.
Brief description
In order to be illustrated more clearly that the technical scheme in this utility model embodiment, below will be to required in embodiment description
Accompanying drawing to be used be briefly described it should be apparent that, for those of ordinary skills, do not paying creativeness
On the premise of work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the power quality data harvester that this utility model embodiment provides；
Fig. 2 is power quality data harvester showing that signal data is processed that this utility model embodiment provides
It is intended to；
Fig. 3 is the structural representation of another kind of power quality data harvester that this utility model embodiment provides；
Illustrate：
ADC- analog-digital converter；
FPGA- field programmable gate array；
DSP48- digital signal processor；
FIFO- push-up storage；
SRAM- static RAM；
LPF- low pass filter；
SRAM Control- static RAM controller.
Specific embodiment
The purpose of this utility model is to provide power quality data harvester, solves the existing electric energy described in background technology
Quality data collection device can not characterize the problem of waveshape signal well.
In order that those skilled in the art more fully understand the technical scheme in this utility model embodiment, and make this reality
Can be become apparent from understandable with the above-mentioned purpose of new embodiment, feature and advantage, real to this utility model below in conjunction with the accompanying drawings
The technical scheme applied in example is described in further detail.
Refer to accompanying drawing 1, accompanying drawing 1 shows the knot of the power quality data harvester that this utility model embodiment provides
Structure schematic diagram.The power quality data harvester that this utility model provides includes data acquisition module, the number being sequentially connected electrically
According to processing module data memory module, wherein, described data acquisition module includes signal receiver；Described data processing module
Including analog-digital converter and field programmable gate array, the two ends of described analog-digital converter connect described signal respectively
Receptor and described field programmable gate array；Described field programmable gate array includes digital signal processor and first in first out
Memorizer, the two ends of described digital signal processor connect described analog-digital converter and described first in first out storage respectively
Device；Described data memory module includes static RAM, described static RAM and described advanced elder generation
Go out memorizer to be connected.
Specifically, the waveshape signal that the signal receiver reception in data acquisition module is sent by transformer, and should
Waveshape signal sends to data processing module, in order to data processing module, received waveshape signal is carried out at data
Reason.
Analog-digital converter (Analog-to-Digital Converter, i.e. ADC) in data processing module receives
After the waveshape signal being sent to signal receiver, this waveshape signal is converted to complement of two's two's complement data, and by this binary system
Complement data sends the numeral to field programmable gate array (Field-Programmable Gate Array, i.e. FPGA)
Signal processor (Digital Signal Processing, i.e. DSP48) and push-up storage (First In First
Out, i.e. FIFO), DSP48 and FIFO carries out the calculating of half-wave virtual value to the complement of two's two's complement data being received, and obtains equivalent
Magnitude of voltage, this equivalent voltage value is sent to data memory module and is stored.Preferably, the electric energy providing in this utility model
In quality data collection device, ADC adopts the high-precision ADC of 16bit.
Static RAM in data memory module (Static Random Access Memory, that is,
SRAM) receive and store equivalent voltage value.SRAM is the access module of FIFO, and user can carry out data acquisition incessantly
Storage, is not limited by storage depth, is realized continuous data acquisition and deposit.
This utility model embodiment provide power quality data harvester can be easy to main frame transfer in SRAM etc.
Effect magnitude of voltage, and show waveform, thus judging whether voltage pulsation exceeds critical field, and then determine whether to start record ripple.
By DSP48 and FIFO used when carrying out data processing, to carry out half-wave to the complement of two's two's complement data being received effective
The calculating of value is it is thus possible to make full use of collected data, and then preferably characterizes waveshape signal.Due to Wave data
Process is to carry out in the power quality data harvester that this utility model embodiment provides, thus greatly reduces backstage and divide
The operand of analysis software, improves the real-time of system.
Refer to accompanying drawing 2, accompanying drawing 2 shows the power quality data harvester of this utility model embodiment offer to letter
The schematic diagram that number is processed.When being calculated, the Wave data of each passage collecting is calculated in real time logical
The voltage signal that time interval was sampled in 1 cycle such as cross, obtain N point discrete voltage signal value u (k), thus, it is possible to be somebody's turn to do
Equivalent voltage value U of periodic voltage signal, sets according to the transmission line of electricity standard value of electric pressures different in practical power systems
Dependent thresholds, for judging whether voltage pulsation exceeds critical field, to determine whether to start record ripple.The meter of equivalent voltage value U
Calculating formula isWherein, U is the virtual value in a cycle of periodic voltage signal；U (k) is discrete electrical
Pressure.It can be seen that U from accompanying drawing 21For the virtual value in a cycle, U2Second half of the cycle for the previous cycle and the next one
Virtual value in the front half period in cycle, can obtain U by that analogy3、U4、U5、U6..., and then obtain the half of all the period of time
Ripple virtual value.
Refer to accompanying drawing 3, accompanying drawing 3 shows another kind of power quality data collection dress that this utility model embodiment provides
The structural representation put.In the power quality data harvester that this utility model embodiment provides, data processing module is also
Including low pass filter (Low-pass filter, i.e. LPF), LPF is connected with signal receiver and ADC respectively.This LPF is only
Only allow to pass through the noise jamming it is thus possible to be effectively isolated in environment less than the signal of cut-off frequency, obtained by improving ADC
Waveshape signal accuracy.
Further, field programmable gate array also includes static RAM controller (Static Random
Access Memory Control, i.e. SRAM Control), SRAM Control connects FIFO and SRAM respectively.SRAM
Control is used for controlling the data transmission to SRAM for the FPGA, and then realizes the data storage of SRAM.
Further, data acquisition module also includes voltage follower, voltage follower connect respectively signal receiver and
LPF.Voltage follower has buffering, isolation, improves the function of load capacity it is thus possible to stablize well and isolation voltage.
The power quality data harvester that this utility model embodiment provides passes through digital signal processor and advanced elder generation
Go out the calculating that memorizer carries out half-wave virtual value to complement of two's two's complement data, collected data can be made full use of, and then
Preferably characterize waveshape signal, but also can directly export measurement voltage, the half-wave virtual value of current signal, simplify the later stage pair
The processing procedure of sampled data, improves real-time, output result more has practicality, and then is easy to failure wave-recording.This practicality
Data obtained by the power quality data harvester that new embodiment provides is processed can be used as the leading bar of failure wave-recording
Part, real-time monitors the change such as the rising sharply of sampled voltage signal, rapid drawdown, facilitates failure wave-recording.Meanwhile, this utility model embodiment
The power quality data harvester providing is applicable not only to power system, but also can be widely applied for aerodynamic neck
Domain test, other data collecting field such as vibration, strain, test of impact structure mechanics field, it is with a wide range of applications.
Although having described this utility model in the way of specific embodiment, those skilled in the art are come
Say, in the case of the spirit and scope of the present utility model being limited without departing from appended claims, can be to this practicality
New carry out variations and modifications, these change and modifications and are also included in the range of this utility model.
Claims (5)
1. power quality data harvester is it is characterised in that described power quality data harvester includes being sequentially connected electrically
Data acquisition module, data processing module data memory module, wherein,
Described data acquisition module includes signal receiver；
Described data processing module includes analog-digital converter and field programmable gate array, described analog-digital converter
Two ends connect described signal receiver and described field programmable gate array respectively；
Described field programmable gate array includes digital signal processor and push-up storage, described digital signal processor
Two ends connect described analog-digital converter and described push-up storage respectively；
Described data memory module includes static RAM, described static RAM and described advanced elder generation
Go out memorizer to be connected.
2. power quality data harvester according to claim 1 is it is characterised in that described data processing module also wraps
Include low pass filter, described low pass filter is connected with described signal receiver and described analog-digital converter respectively.
3. power quality data harvester according to claim 2 is it is characterised in that described field programmable gate array
Also include static RAM controller, described static RAM controller connects described advanced elder generation respectively
Go out memorizer and described static RAM.
4. the power quality data harvester according to Claims 2 or 3 is it is characterised in that described data acquisition module
Also include voltage follower, described voltage follower connects described signal receiver and described low pass filter respectively.
5. power quality data harvester according to claim 4 is it is characterised in that described analog-digital converter is
The analog-digital converter of 16bit precision.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620891370.3U CN205941741U (en) | 2016-08-17 | 2016-08-17 | Electrical power quality data collection system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620891370.3U CN205941741U (en) | 2016-08-17 | 2016-08-17 | Electrical power quality data collection system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107782994A (en) * | 2017-10-20 | 2018-03-09 | 广州供电局有限公司 | Power Quality Transient event monitoring method and device |
| CN109298286A (en) * | 2018-10-29 | 2019-02-01 | 福建和盛高科技产业有限公司 | A method of judging that reason and design temporarily drop source orientation algorithm temporarily drop in power quality |
-
2016
- 2016-08-17 CN CN201620891370.3U patent/CN205941741U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107782994A (en) * | 2017-10-20 | 2018-03-09 | 广州供电局有限公司 | Power Quality Transient event monitoring method and device |
| CN107782994B (en) * | 2017-10-20 | 2020-05-12 | 广州供电局有限公司 | Method and device for monitoring transient event of power quality |
| CN109298286A (en) * | 2018-10-29 | 2019-02-01 | 福建和盛高科技产业有限公司 | A method of judging that reason and design temporarily drop source orientation algorithm temporarily drop in power quality |
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