CN106526379A - Method for implementing power quality test analysis based on wireless sampling - Google Patents
Method for implementing power quality test analysis based on wireless sampling Download PDFInfo
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- CN106526379A CN106526379A CN201611018731.4A CN201611018731A CN106526379A CN 106526379 A CN106526379 A CN 106526379A CN 201611018731 A CN201611018731 A CN 201611018731A CN 106526379 A CN106526379 A CN 106526379A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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Abstract
Power quality is tested and analyzed by using a power quality analyzer at present, this method needs long-distance stayed power supply and many and complex test circuit wires, and the supervision span of the whole test process is difficult. The invention relates to the field of power quality test, and particularly to a method for implementing power quality test analysis based on wireless sampling. The method specifically comprises the steps of: a wireless sampling unit connecting voltage and current of the secondary side of a power system, receiving a synchronous signal from a digital power quality analysis unit, and simultaneously wirelessly sending the acquired data to the digital power quality analysis unit; the digital power quality analysis unit wirelessly implementing synchronous acquisition of the wireless sampling unit, simultaneously receiving data carrying time scales from the wireless sampling unit, analyzing and processing the data, thus realizing power quality test analysis. The method does not need long-distance stayed power supply, is simple in test circuit wire connection and disconnection and low in time consumption and improves the working efficiency, and the whole test process is small in supervision span and easy to realize.
Description
Technical field
The present invention relates to electric energy quality test field, specifically a kind of to realize that electric energy quality test is analyzed based on wireless sampling
Method.
Background technology
The power quality analyzer test analysis quality of power supply, this method is used to need to lead to voltage, current signal at present
Cross p-wire and be directly accessed power quality analyzer body, although this connected mode reliability, signal attenuation are little, but tested right
As secondary side needs to be directly connected to power quality analyzer, it has not been convenient to which fixed p-wire, p-wire are fixed and loosely easily cause two
The short circuit of secondary voltage or secondary current open circuit, during operation security risk than larger, furthermore connect when testing every time, take out stitches it is all number
Tired, while needing to be powered to power quality analyzer from remotely bracing wire with power wire coil, remote bracing wire is easily pulled out by people
Or stumble disconnected, test interruption, loss of data is caused, while some become it is difficult to suitable power supply be found to the quality of power supply point in rural area
Analyzer is powered.This method of testing is present needs remote bracing wire to power, test loop wiring is more complicated and entirely tests
The difficult big shortcoming of journey supervision span.
The content of the invention
In order to solve the above problems, the invention provides a kind of side for realizing electric energy quality test analysis based on wireless sampling
Method, concrete technical scheme are as follows：
Wireless sampling unit connects the voltage and current of power system secondary side, receives from digitalized electric energy mass analysis cell
Synchronizing signal, while by the data of collection by being wirelessly transmitted to digitalized electric energy mass analysis cell, digitalized electric energy matter
Amount analytic unit passes through wirelessly to realize the synchronous acquisition of wireless sampling unit, while receiving the band markers from wireless sampling unit
Data and be analyzed and process, comprise the following steps：
(1) sampling unit connection：Voltage clamp is connected with voltage transformer secondary side, current clamp clips to Current Transformer Secondary
Side, opens wireless sampling unit on and off switch, waits wireless pairing connection；
(2) digitalized electric energy mass analysis cell is connected with sampling unit：Open digitalized electric energy mass analysis cell, connection electricity
Source, start are set up with wireless sampling unit and are connected；
(3) arrange parameter：The parameters such as voltage, electric current no-load voltage ratio are set, by voltage, electric current, active, idle numerical value and phase place and reality
Voltage, electric current, active, idle numerical value contrast, it is ensured that wiring and no-load voltage ratio arrange errorless；
(4) start test：Check whether wireless sampling unit has been fixed, start formal measurement；
(5) terminate test：Test is completed, and first makes digitalized electric energy mass analysis cell quit work, and is then shut off wireless sampling
The power supply of unit, removes wireless sampling unit, carries out primary data analysis, check data integrity；
(6) restoring scene, terminates this test：Digitalized electric energy mass analysis cell power line and netting twine is removed, by digitized
Power quality analysis unit and the vanning of wireless sampling unit, restoring scene, terminate test.
Further, the wireless sampling unit includes voltage/current transformer module, Signal-regulated kinase, A/D sampling moulds
Block, Micro-processor MCV module, WIFI module, power module；The voltage/current transformer module is connected to secondary system side
The voltage transformer of voltage is changing into 10V low voltage signals, and being connected to the current transformer of secondary system side electric current, to be changed into 10V low
Voltage signal, this two paths of signals are exported to Signal-regulated kinase；The Signal-regulated kinase is by voltage/current transformer module
Within -2.5 ~+2.5V of input range that signal condition after conversion is allowed to the A/D chips of A/D sampling modules, while to passing through
Voltage（Electric current）Signal after transformer block transforms is filtered process, after higher hamonic wave is filtered and signal output to A/
D sampling modules；The A/D sampling modules are sampled to the output signal from Signal-regulated kinase；The Micro-processor MCV
Module control A/D sampling module samplings, reading data, and sampled data is wirelessly transmitted to into digitalized electric energy by WIFI module
Mass analysis cell；The WIFI module receives the synchronizing signal from digitalized electric energy mass analysis cell, sends microprocessor
Target voltage, current data during the band that device MCU module is collected；The power module obtains power supply from voltage transformer, passes through
Various electric pressure power supplys of the decompression transformation for needed for the offer of wireless sampling unit, for maintaining the work of each chip and processor
Make.
Further, the digitalized electric energy mass analysis cell is included at working power module, communication interface modules, data
Reason module, setting display module, data storage and real-time clock module；The working power module provides digitalized electric energy quality
Various electric pressure power supplys needed for analytic unit, for maintaining the work of each chip and data processing module；The communication connects
Mouth mold block provides wireless WIFI, the communication interface of Ethernet, and wireless WIFI receives voltage, the electric current that wireless sampling unit is collected
Data, Ethernet are used for connecting between digitalized electric energy mass analysis cell and host computer PC；The data processing module will connect
The data for receiving carry out Fourier decomposition and calculate voltage, current value, each harmonic and total harmonic distortion factor, three-phase voltage not
Balance, the numerical value of flickering value；The setting display module is shown for carrying out parameter setting, data and index；The data are deposited
Storage and real-time clock module are used for storing statistics, analysis report and data, real-time display time synchronous three-phase and wirelessly sample list
The data sampling of unit.
Further, the wireless sampling unit is contained within Magnet.
Further, one earth resistance of access before voltage signal enters A/D sampling modules.
Further, the range of error of the Signal-regulated kinase be amplitude 0～0.1%, output signal size be -2.5 ~+
2.5V, second order active low pass filter cutoff frequency are more than 3kHz.
Beneficial effects of the present invention are：Realize that based on wireless sampling the method for electric energy quality test analysis need not be remote
Bracing wire is powered, and test loop connects, it is simply and not time-consuming to take out stitches, and improves work efficiency, whole test process supervision span it is little and
Easily realize.
Description of the drawings
Fig. 1 is a kind of based on wireless the step of realizing the method for electric energy quality test analysis flow chart of sampling；
Fig. 2 is the structure chart for realizing electric energy quality test analytical equipment based on wireless sampling.
Specific embodiment
The present invention will be further described below in conjunction with the accompanying drawings.
Wireless sampling unit connects the voltage and current of power system secondary side, receives from digitalized electric energy quality analysiss
The synchronizing signal of unit, while by the data of collection by being wirelessly transmitted to digitalized electric energy mass analysis cell, digitized electricity
Energy mass analysis cell passes through wirelessly to realize the synchronous acquisition of wireless sampling unit, while receiving the band from wireless sampling unit
When target data be analyzed and process, specifically carry out Fourier decomposition calculate voltage, current value, each harmonic and
Total harmonic distortion factor, imbalance of three-phase voltage, the value of flickering value.The method is comprised the following steps：
(1) sampling unit connection：Voltage clamp is connected with voltage transformer secondary side, current clamp clips to Current Transformer Secondary
Side, opens wireless sampling unit on and off switch, waits wireless pairing connection；
(2) digitalized electric energy mass analysis cell is connected with sampling unit：Open digitalized electric energy mass analysis cell, connection electricity
Source, start are set up with wireless sampling unit and are connected；
(3) arrange parameter：The parameters such as voltage, electric current no-load voltage ratio are set, by voltage, electric current, active, idle numerical value and phase place and reality
Voltage, electric current, active, idle numerical value contrast, it is ensured that wiring and no-load voltage ratio arrange errorless；
(4) start test：Check whether wireless sampling unit has been fixed, start formal measurement；
(5) terminate test：Test is completed, and first makes digitalized electric energy mass analysis cell quit work, and is then shut off wireless sampling
The power supply of unit, removes wireless sampling unit, carries out primary data analysis, check data integrity；
(6) restoring scene, terminates this test：Digitalized electric energy mass analysis cell power line and netting twine is removed, by digitized
Power quality analysis unit and the vanning of wireless sampling unit, restoring scene, terminate test.
The wireless sampling unit includes voltage/current transformer module, Signal-regulated kinase, A/D sampling modules, Wei Chu
Reason device MCU module, WIFI module, power module.Preferably, in voltage/current transformer module, voltage changer is used
TR1102-2C types detection presses output type voltage changer, and specification is Krl=100V/10V respectively, what power pack was adopted
It is TR0102-2C types detection pressure output type power pack, specification is Kr2=5A/10V respectively.Signal-regulated kinase sets
256 points, the i.e. sample frequency of sampling per cycle to measured signal is 12.8ksps.In order to accurately measure 50 subharmonic, will
The composition of more than 2.5kHz is filtered out, and determines that the overall design objective of signal conditioning circuit is：Range of error be amplitude 0～
0.1%, output signal size is -2.5 ~+2.5V, and low-pass filtering cut-off frequency is more than 3kHz.Preferably, employ with low
The TLC2272 operational amplifiers of noise rail to rail are nursed one's health to input signal, constitute a second order active low-pass filtering
Device, is higher than the high-frequency interferencing signal of 3KHz in filtering sampled signal, and which possesses simultaneously samples and filter two functions, principle
Simply, it is easy to accomplish, precision is also higher, can effectively suppress the interference of high frequency, preferably keep the purity of signal.For having prevented
Larger current flowing signal conditioning module and cause the chip in circuit to be damaged, voltage signal enter A/D sampling modules it
Before, access an earth resistance.Preferably, A/D sampling modules use the A/D converter of 16 low-power consumption and cost
AD7665, can be to the synchronized sampling of 2 tunnel analogue signals or the asynchronous-sampling of 4 tunnel analogue signals.1 mutually wireless sampling in the present invention
There are 1 road voltage and 1 road current signal in unit, the synchronized sampling of 2 tunnel analogue signals can be met using AD7665.Preferably,
Micro-processor MCV module has the advantages that highly integrated and low-power consumption using the NXP companies LPC1343 based on Cortex-M3,
LPC1343 easily can be entered line interface with WIFI module by USB interface.Preferably, core of the WIFI module using low-power consumption
Piece RT5572 is designed, and is supported 2T2R base band and 2.4GHz/5GHz two-bands, peak transfer rate 300Mbps, is met IEEE
802.11a/b/g/n standard.Preferably, the power module in wireless sampling unit is produced using Width funtion input AH7550 chips
Raw 5.0V voltages and TPS79533 chips produce 3.3V voltages.
The digitalized electric energy mass analysis cell include working power module, communication interface modules, data processing module,
Display module, data storage and real-time clock module are set.Preferably, the working power in digitalized electric energy mass analysis cell
Module-external input power is alternating current 220V, through rectification, decompression transformation, produces 5V using AE2596 chips, adopts
AS1117M3-3.3 chips produce 3.3V and produce 1.8V totally three kinds of electric pressures using AS1117M3-1.8.Preferably, communicate
Ethernet PHY chip DM9161, compatible 10M/100M, the RF transceiver CC2520 of TI company of the interface module using low-power consumption,
Ethernet physical layer is realized, with selectivity/compossibility and excellent link budget functional characteristics, meets various proprietary using in
The requirement of wireless system, and extensive hardware supported is provided, including processing data packets, data buffering, burst transfer, data
Encryption, data authentication, idle channel assessment, link quality instruction and packet clocking information etc..Preferably, data processing mould
Block adopts atmel corp high-performance ARM9 processor AT91SAM9260 for core, with ethernet mac, single purpose LCD interface,
The abundant interface such as USB.Preferably, display module is set and adopts 7 cun of TFT LCD capacitance plates, resolution 800x480.Preferably, number
It is used for the Nand FLASH of outside 256M using K9F2G08 chips according to storage and real-time clock module, using HY57V64162 cores
Piece is used for outside 64M SDRAM, is used for real-time clock using the PCF8563 chips that PHILIPS companies produce, includes I2C buses
Multifunction timepiece/the calendar chip with extremely low power dissipation of interface function, with various warning functions, timer function, clock
Output function and interrupt output function, can complete the timing services of various complexity or even can provide in watchdog function for ARM9
Portion's clock circuit and internal oscillator circuit, internal low voltage detection circuit, I2C bus communications mode not only make peripheral circuit and
Which is succinct and also improves the reliability of chip, while the word address register embedded after reading and writing data every time can be automatically generated
Increment.
The present invention is not limited to above-described specific embodiment, the foregoing is only the preferable case study on implementation of the present invention
, not to limit the present invention, all any modifications made within the spirit and principles in the present invention, equivalent and change
Enter, should be included within the scope of the present invention.
Claims (6)
1. a kind of based on the wireless method sampled and realize electric energy quality test analysis, it is characterised in that：Wireless sampling unit connection
The voltage and current of power system secondary side, receives the synchronizing signal from digitalized electric energy mass analysis cell, while will adopt
, by being wirelessly transmitted to digitalized electric energy mass analysis cell, digitalized electric energy mass analysis cell is by wireless real for the data of collection
The existing synchronous acquisition of wireless sampling unit, at the same receive from the band of wireless sampling unit when target data be analyzed and locate
Reason, comprises the following steps：
(1) wireless sampling unit connection：Voltage clamp is connected with voltage transformer secondary side, current clamp clips to current transformer two
Secondary side, opens wireless sampling unit on and off switch, waits wireless pairing connection；
(2) digitalized electric energy mass analysis cell is connected with sampling unit：Open digitalized electric energy mass analysis cell, connection electricity
Source, start are set up with wireless sampling unit and are connected；
(3) arrange parameter：Voltage, electric current no-load voltage ratio parameter are set, by voltage, electric current, active, idle numerical value and phase place and actual electricity
Pressure, electric current, active, idle numerical value contrast, it is ensured that wiring and no-load voltage ratio arrange errorless；
(4) start test：Check whether wireless sampling unit has been fixed, start formal measurement；
(5) terminate test：Test is completed, and first makes digitalized electric energy mass analysis cell quit work, and is then shut off wireless sampling
The power supply of unit, removes wireless sampling unit, carries out primary data analysis, check data integrity；
(6) restoring scene, terminates this test：Digitalized electric energy mass analysis cell power line and netting twine is removed, by digitized
Power quality analysis unit and the vanning of wireless sampling unit, restoring scene, terminate test.
2. according to claim 1 a kind of based on the wireless method sampled and realize electric energy quality test analysis, its feature exists
In：The wireless sampling unit includes voltage/current transformer module, Signal-regulated kinase, A/D sampling modules, microprocessor
MCU module, WIFI module, power module；The voltage that the voltage/current transformer module is connected to secondary system side voltage is mutual
Sensor is changing into 10V low voltage signals, and the current transformer for being connected to secondary system side electric current is changed into 10V low voltage signals, this
Two paths of signals is exported to Signal-regulated kinase；The Signal-regulated kinase is by the letter after voltage/current transformer block transforms
Within -2.5 ~+2.5V of input range that number conditioning is allowed to the A/D chips of A/D sampling modules, while to by voltage/current
Signal after transformer block transforms is filtered process, to A/D sampling modules after higher hamonic wave is filtered and signal output；
The A/D sampling modules are sampled to the output signal from Signal-regulated kinase；The Micro-processor MCV module controls A/
The sampling of D sampling modules, reading data, and sampled data is wirelessly transmitted to into digitalized electric energy quality analysiss list by WIFI module
Unit；The WIFI module receives the synchronizing signal from digitalized electric energy mass analysis cell, and sends Micro-processor MCV module
Target voltage, current data during the band for collecting；The power module obtains power supply from voltage transformer, by decompression transformation is
Wireless sampling unit provides required various electric pressure power supplys, for maintaining the work of each chip and processor.
3. according to claim 1 a kind of based on the wireless method sampled and realize electric energy quality test analysis, its feature exists
In：The digitalized electric energy mass analysis cell includes working power module, communication interface modules, data processing module, setting
Display module, data storage and real-time clock module；The working power module provides digitalized electric energy mass analysis cell institute
The various electric pressure power supplys for needing, for maintaining the work of each chip and data processing module；The communication interface modules is provided
Wireless WIFI, the communication interface of Ethernet, wireless WIFI receive voltage, the current data that wireless sampling unit is collected, ether
Net is used for connecting between digitalized electric energy mass analysis cell and host computer PC；The data processing module is by the data for receiving
Carry out Fourier decomposition and calculate voltage, current value, each harmonic and total harmonic distortion factor, imbalance of three-phase voltage, flickering
The numerical value of value；The setting display module is shown for carrying out parameter setting, data and index；The data storage and it is real-time when
Clock module is used for storing the data of statistics, analysis report and data, real-time display time the wireless sampling unit of synchronous three-phase and adopts
Sample.
4. according to claim 1 a kind of based on the wireless method sampled and realize electric energy quality test analysis, its feature exists
In：The wireless sampling unit is contained within Magnet.
5. according to claim 2 a kind of based on the wireless method sampled and realize electric energy quality test analysis, its feature exists
In：An earth resistance is accessed before voltage signal enters A/D sampling modules.
6. according to claim 2 a kind of based on the wireless method sampled and realize electric energy quality test analysis, its feature exists
In：The range of error of the Signal-regulated kinase be amplitude 0～0.1%, output signal size be -2.5 ~+2.5V, second order active
Low pass filter cutoff frequency is more than 3kHz.
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| CN109633267A (en) * | 2018-12-17 | 2019-04-16 | 江苏方天电力技术有限公司 | A kind of three phase harmonic measuring device based on wireless transmission |
| CN112394248A (en) * | 2020-11-20 | 2021-02-23 | 南方电网数字电网研究院有限公司 | Power quality measurement device, system and method |
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Application publication date: 20170322 |