CN208255327U - Multichannel power quality analysis device based on 3G network - Google Patents
Multichannel power quality analysis device based on 3G network Download PDFInfo
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Abstract
The utility model belongs to Power Quality Detection technical field, in particular to a kind of multichannel power quality analysis device based on 3G network.The utility model includes analog signals conditioning circuit, analog-digital converter, digital signal processor, master controller, screen display module, key module, 3G module and memory module；The input terminal of analog-digital converter is connect with analog signals conditioning circuit output end, and the output end of analog-digital converter and the input terminal of digital signal processor connect；The output end of digital signal processor and the input terminal of master controller connect；Master controller is bi-directionally connected with 3G module, memory module respectively, and screen display module, key module are electrically connected with master controller respectively.Simple with structure, rationally, data transmission bauds is fast, is not limited by wiring condition for design, compared to traditional wire transmission mode, the comparatively safe health of 3G network replaces artificial scene reading, save the cost improves working efficiency, solves the problems, such as that electric energy quality monitoring is incomplete.
Description
Technical field
The utility model belongs to Power Quality Detection technical field, in particular to a kind of multichannel electric energy based on 3G network
Quality analysis apparatus.
Background technique
With the popularization and development of smart grid and distributed energy resource system, power quality problem increasingly loom large and
It is important.It is national successively to have promulgated GB/T12325-2008 " power quality admissible deviation of supply volt- age ", GB/T15945-2008
" power quality power system frequency deviation ", GB/15543-2008 " power quality _ imbalance of three-phase voltage ", GB/T12326-
The national standards such as 2008 " power quality voltage fluctuation and flickers ".It can be seen that accurately and reliably being examined to each link power quality
It surveys, is in response to an important decision of country.Currently, most of equipment for monitoring power quality is by being linked into Ethernet and CAN
Bus realizes that the cable network of data communicates with host computer, but requiring user is that existing distribution equipment specially sets up monitoring
Network, it is very inconvenient for user.The utility model device carries out wireless data communication, covering by 3G module and server
Range is wide, and data transmission bauds is fast, and compatibility is high, can be well adapted for the demand in market.
As the sensitivity of power supply quality is higher and higher, to power quality, more stringent requirements are proposed, first has to electricity
Energy quality makes accurate comprehensive detection and analysis, and most of equipment for monitoring power quality only has 8 voltage and currents acquisitions and leads to
Road, the 12 road voltages that can not be exported to substation equipment interval secondary converter, current signal carry out electric energy quality monitoring simultaneously.
Summary of the invention
In order to solve, equipment for monitoring power quality wire transmission in the prior art wiring is complicated and transmission rate is equal scarce slowly
It falls into and the problem of voltage and current acquisition channel deficiency is designed and is reasonably based on the utility model proposes a kind of structure is simple
The multichannel power quality analysis device of 3G network.
In order to realize that above-mentioned utility model mesh, the utility model are achieved through the following technical solutions:
Multichannel power quality analysis device based on 3G network, including analog signals conditioning circuit, analog-digital converter,
Digital signal processor, master controller, screen display module, key module, 3G module, memory module；The analog-digital converter it is defeated
Enter end to be connected with the output end of analog signals conditioning circuit, the output end of analog-digital converter and digital signal processor it is defeated
Enter end to be connected；The output end of the digital signal processor is connected with the input terminal of master controller；The master controller point
It is not bi-directionally connected with 3G module, memory module, screen display module, key module are electrically connected with master controller respectively.
12 road voltages that the analog signals conditioning circuit exports substation equipment interval secondary converter, electric current letter
Number signal condition is carried out, improves the range required to analog-digital converter input.
The analog signals conditioning circuit receives the voltage and current signal of substation equipment interval secondary converter output,
Voltage and current signal is three road electric current Ia, Ib, Ic signals of relay protection circuit respectively, measure route three road electric current Ia, Ib,
Ic signal, the current signal In of neutral point, voltage signal are line voltage Ua, Ub, Uc, Un and busbar voltage U0, voltage electricity respectively
Stream signal inputs analog signals conditioning circuit simultaneously, and analog signal conditioning circuit is improved by voltage signal conditioning and current signal
Composition, voltage signal conditioning are completed by electric resistance partial pressure sensor, and current signal conditioning is passed by the electromagnetic type electric current with feedback winding
Sensor is completed；After handling by analog signals conditioning circuit, it is brought to the required range of analog-digital converter input.
The analog signals of the analog signals conditioning circuit output pass through analog input channel input analog-to-digital converter,
Analog-digital converter uses AD7616, and AD7616 is 16 DAS, supports to carry out two-way synchronized sampling, each channel to 16 channels
Sample rate is up to 1 MSPS, and every channel separate configurations are at ± 10 V, ± 5 V, or ± 2.5 V, 8 kV of chip-scale simulation input
ESD protection, samples with burst mode, and the free pre-programmed of sampling channel sequence, signal-to-noise ratio is up to 90.5 dB, built in the device
Simulation input clamp protection circuits, tolerance reach the voltage of ± 21 V, and no matter with the work of which kind of sample frequency, the simulation of AD7616 is defeated
Entering impedance is 1 M Ω, the also built-in anti-aliasing analog filter of single order of analog-digital converter and digital filter.
The digital signal processor receives the digital signal of analog-digital converter output, the number letter of analog-digital converter output
Number by SPI interface connect digital signal processor input terminal.
The digital signal processor is TMS320F28335, is 32 floating point processors, has 150MHz high speed processing
Ability has 32 floating point processing units, and 6 DMA channels support ADC, McBSP and EMIF, has the PWM on 18 tunnels to export, wherein
There is the PWM that 6 tunnels are the distinctive higher precision of TI to export HRPWM, 12 16 channel ADC have I2C、SPI、eCAN、Epwm、
LVDS bus interface.
The current signal conditioning is completed by the electromagnetic type current sensor with feedback winding, in low-pressure side divider resistance
One discharge tube of two sides parallel connection, discharge voltage are set smaller than the maximum voltage allowed equal to low-pressure side.
The power quality data for acquiring and calculating is sent to main control by SPI interface by the digital signal processor
Device, master controller are connect by LVDS interface with screen display module；Pass through I2C interface is connect with key module；By SPI interface with
3G module connection.
The master controller is sent the power quality parameter of calculating in server by 3G module, server connection meter
Calculation machine, computer issue instructions to server, and server accesses power quality analysis device by 3G module, make power quality point
Analysis apparatus and server, computer being integrally formed system.
The display pattern of key module control includes: VAH mode, waveform chart-pattern, power quality general view mode, rapid
Rise rapid drawdown mode, harmonic mode, m-Acetyl chlorophosphonazo mode, flickering mode, transient mode, uneven mode, power and power mode, wave
Gush current-mode, trigger parameter checks mode interface.
The utility model compared with prior art, have the following advantages that and the utility model has the advantages that
(1) structure is simple, and design is reasonable.Wireless data communication, 3G network communication side are carried out by 3G module and server
Formula wide coverage, data transmission bauds is fast, is not limited by wiring condition, and traditional wire transmission mode, 3G network phase are compared
To be also it is most safe and healthy, replace artificial scene reading, both saved cost, also improved working efficiency.
(2) device can carry out electric energy quality monitoring to 16 road semaphores of output simultaneously, to substation equipment interval
12 road voltages, the current signal of two times transfer device output carry out electric energy quality monitoring simultaneously, and it is incomplete to solve electric energy quality monitoring
The problem of face.Meet relay protection, measurement, metering respectively to the sensitivity requirement of power quality, power quality is made accurately
Detection and analysis provides foundation for the improvement of power quality.
Detailed description of the invention
Fig. 1 is the utility model structure diagram；
Fig. 2 is that voltage signal improves schematic diagram in the utility model；
Fig. 3 is that current signal improves schematic diagram in the utility model；
Fig. 4 is the schematic diagram of master controller in the utility model.
Specific embodiment
The technical scheme in the utility model embodiment is clearly and completely described below, it is clear that described reality
Applying example is only the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention,
Every other embodiment obtained by those of ordinary skill in the art without making creative efforts, belongs to this reality
With novel protected range.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be
Mechanical connection, is also possible to be electrically connected；It can be directly connected, two can also be can be indirectly connected through an intermediary
The interaction relationship of connection or two elements inside element.It for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term in the present invention.
As shown in Figure 1, the utility model is a kind of multichannel power quality analysis device based on 3G network, including simulation
Measure signal conditioning circuit, analog-digital converter, digital signal processor, master controller, screen display module, key module, 3G module and
Memory module；The input terminal of the analog-digital converter is connected with the output end of analog signals conditioning circuit, analog-digital converter
Output end be connected with the input terminal of digital signal processor；The output end of the digital signal processor and master controller
Input terminal is connected；The master controller is bi-directionally connected with 3G module, memory module respectively, screen display module, key module difference
It is electrically connected with master controller.
When it is implemented, 12 tunnels that the analog signals conditioning circuit exports substation equipment interval secondary converter
Voltage, current signal carry out signal condition, improve the range required to analog-digital converter input.
The signal for flowing into power quality analysis device is the voltage and current letter of substation equipment interval secondary converter output
Number, voltage and current signal is three road electric current Ia, Ib, Ic signals of relay protection circuit respectively, measure route three road electric current Ia,
Ib, Ic signal, the current signal In of neutral point, voltage signal are line voltage Ua, Ub, Uc, Un and busbar voltage U0, voltage respectively
Current signal inputs analog signals conditioning circuit simultaneously, and analog signal conditioning circuit is by voltage signal conditioning and current signal tune
Reason composition, voltage signal conditioning are completed by electric resistance partial pressure sensor, and current signal is improved by the electromagnetic type electric current with feedback winding
Sensor is completed.After handling by analog signals conditioning circuit, it is brought to the required range of analog-digital converter input.
The analog signals of analog signals conditioning circuit output pass through analog input channel input analog-to-digital converter, modulus
Converter uses AD7616, is a 16 DAS, supports to carry out two-way synchronized sampling, each channel sample rate to 16 channels
Up to 1 MSPS, every channel can be with separate configurations at ± 10 V, ± 5 V, or ± 2.5 V, 8 kV of chip-scale simulation input
ESD protection, samples with burst mode, sampling channel sequence can free pre-programmed, signal-to-noise ratio is up to 90.5 dB, utilizes piece
Interior over-sampling mode can realize higher SNR performance, the device built-in analog input clamp protection circuits, can be resistant to up to ±
The voltage of 21 V, no matter with the work of which kind of sample frequency, the simulation input impedance of AD7616 is 1 M Ω, and the device is also built-in
The anti-aliasing analog filter of single order and digital filter ensure that the transmission rate and quality of signal.
As shown in Fig. 2, the digital signal processor receives the digital signal of analog-digital converter output.Wherein, modulus turns
The digital signal of parallel operation output connects the input terminal of digital signal processor by SPI interface, and digital signal processor is to input
Digital signal obtain the index parameter of power quality by meeting the power quality analysis algorithm of ieee standard, complete to electric energy
The acquisition and operation of qualitative data.Analytical calculation index includes: voltage, electric current, frequency, harmonic voltage, harmonic current, harmonic wave function
Rate, flickering, tri-phase unbalance factor.Digital signal processor selects the TMS320F28335 of TI company, is at a 32 floating-points
Manage device, the high speed processing ability with 150MHz has 32 floating point processing units, 6 DMA channels support ADC, McBSP and
EMIF has the PWM on up to 18 tunnels to export, wherein there is the PWM that 6 tunnels are the distinctive higher precision of TI to export (HRPWM), 12 16
Channel ADC, has I2C, the precision of the bus interface such as SPI, eCAN, Epwm, LVDS, the device is high, at low cost, small power consumption, property
Can be high, peripheral hardware integrated level is high, and data and program amount of storage are big, and A/D conversion is more accurately quick etc..TMS320F28335 is to acquisition
Data are calculated, and operation meets the power quality analysis algorithm of ieee standard, obtain the achievement data of power quality, completion pair
The acquisition and operation of power quality data.Index include: voltage, electric current, frequency, harmonic voltage, harmonic current, harmonic power,
Flickering, tri-phase unbalance factor.
Current signal conditioning is completed by the electromagnetic type current sensor with feedback winding.Its basic principle is as shown in Figure 3.?
The two sides of a low-pressure side divider resistance discharge tube in parallel, discharge voltage are set smaller than the maximum electricity allowed equal to low-pressure side
Pressure, the influence the purpose is to the overvoltage prevented to subsequent measuring circuit.
The power quality data for acquiring and calculating is sent to master controller by SPI interface by digital signal processor, main
Controller is connect by LVDS interface with screen display module；Pass through I2C interface is connect with key module；Pass through SPI interface and 3G mould
Block connection.
As shown in figure 4, Fig. 4 is the working principle diagram of master controller.Wherein, master controller receives digital signal processor meter
The power quality data of processing is calculated, and is stored to the memory module of master controller, master controller receives the instruction handle of key module
The storage information such as corresponding power quality data is sent to screen display module and shows, master controller is carried out by 3G module and server
Communication, server receives the signal from master controller, and sends a signal to master controller.
When it is implemented, master controller is sent the power quality parameter of calculating in server by 3G module, service
Device connects computer, and computer issues instructions to server, and server accesses power quality analysis device by 3G module, makes electricity
It can quality analysis apparatus and server, computer being integrally formed system.Computer is by 3G module to power quality analysis
The parameters such as the device method of operation, power quality threshold value are modified setting；Real time inspection test line power quality parameter；To electricity
The historical datas such as energy quality events and working condition variation carry out record storage；Downloading fieldtesting results simultaneously print.Using this
Kind wireless communication mode replaces artificial scene reading or wired connection, has both saved cost, has also improved working efficiency.
Master controller selects Freescale Cortex-A9, four core i.MX6Q processors, the processor host frequency 1GHz, 2G
DDR3 memory, 16GB EMMC storage.
By the controllable display pattern of key module include: VAH mode, waveform chart-pattern, power quality general view mode,
Rise sharply rapid drawdown mode, harmonic mode, m-Acetyl chlorophosphonazo mode, flickering mode, transient mode, uneven mode, power and power mode,
Surge current mode, trigger parameter check mode interface.Various modes show that content is as follows: VAH mode can use real-time measurement
Value and the mode of tendency chart show the various detailed measurements information by measured frequency and each phase measured voltage and electric current；Power quality
General view mode can obtain the overall situation for being measured the power quality of system；The rapid drawdown mode that rises sharply to capture rapid drawdown, interrupt and
The suddenly change for the measured voltages such as rise sharply；Harmonic mode provides tested electricity in a manner of histogram, real-time measurement values and tendency chart
The detailed measurements information of the harmonic wave of pressure, electric current and power；M-Acetyl chlorophosphonazo mode is with the side of histogram, real-time measurement values and tendency chart
Formula provides the detailed measurements information of the m-Acetyl chlorophosphonazo of measured voltage and electric current；Flickering mode is in the form of real-time measurement values and tendency chart
Provide flicker measurement value；Transient mode helps user to capture the duration caused by shock pulse and oscillation in Microsecond grade
The mutation of voltage waveform；The mode of uneven mode phasor diagram, real-time measurement values and tendency chart reacts each phase voltage and electricity
The phase relation of stream；Power and power mode real-time measurement values and the mode of tendency chart provide tested electric power facility power and
The detailed measurements information of electric energy；Surge current mode provides capture quickly substantially curent change for user, i.e. surge current
Means；Trigger parameter checks that mode shows various trigger parameters in a manner of real-time measurement values and tendency chart.
Only the preferred embodiment of the utility model is explained in detail above, but the utility model be not limited to it is above-mentioned
Embodiment can also not depart from the utility model aims within the knowledge of a person skilled in the art
Under the premise of make a variety of changes, various change should be included within the scope of protection of this utility model.
Claims (10)
1. the multichannel power quality analysis device based on 3G network, it is characterised in that: including analog signals conditioning circuit, mould
Number converter, digital signal processor, master controller, screen display module, key module, 3G module and memory module；The modulus
The input terminal of converter is connected with the output end of analog signals conditioning circuit, the output end and digital signal of analog-digital converter
The input terminal of processor is connected；The output end of the digital signal processor is connected with the input terminal of master controller；It is described
Master controller is bi-directionally connected with 3G module, memory module respectively, and screen display module, key module are electrically connected with master controller respectively.
2. the multichannel power quality analysis device according to claim 1 based on 3G network, it is characterised in that: the mould
12 road voltages that analog quantity signal conditioning circuit exports substation equipment interval secondary converter, current signal carry out signal tune
Reason improves the range required to analog-digital converter input.
3. the multichannel power quality analysis device according to claim 1 based on 3G network, it is characterised in that: the mould
Analog quantity signal conditioning circuit receives the voltage and current signal of substation equipment interval secondary converter output, voltage and current signal point
It is not three road electric current Ia, Ib, Ic signals of relay protection circuit, measures three road electric current Ia, Ib, Ic signals of route, neutral point
Current signal In, voltage signal is line voltage Ua, Ub, Uc, Un and busbar voltage U0 respectively, and voltage and current signal inputs simultaneously
Analog signals conditioning circuit, analog signal conditioning circuit are made of voltage signal conditioning and current signal conditioning, voltage signal
Conditioning is completed by electric resistance partial pressure sensor, and current signal conditioning is completed by the electromagnetic type current sensor with feedback winding；Pass through
After the processing of analog signals conditioning circuit, it is brought to the required range of analog-digital converter input.
4. the multichannel power quality analysis device according to claim 1 based on 3G network, it is characterised in that: the mould
The analog signals of analog quantity signal conditioning circuit output are used by analog input channel input analog-to-digital converter, analog-digital converter
AD7616, AD7616 are 16 DAS, support to carry out two-way synchronized sampling to 16 channels, each channel sample rate is up to 1
MSPS, every channel separate configurations have at ± 10 V, ± 5 V, or ± 2.5 V, 8 kV ESD of chip-scale simulation input protection
The sampling of burst mode, the free pre-programmed of sampling channel sequence, signal-to-noise ratio are up to 90.5 dB, device built-in analog input clamp
Circuit is protected, tolerance reaches the voltage of ± 21 V, and no matter with the work of which kind of sample frequency, the simulation input impedance of AD7616 is 1
M Ω, the also built-in anti-aliasing analog filter of single order of analog-digital converter and digital filter.
5. the multichannel power quality analysis device according to claim 1 based on 3G network, it is characterised in that: the number
Word signal processor receives the digital signal of analog-digital converter output, and the digital signal of analog-digital converter output passes through SPI interface
Connect the input terminal of digital signal processor.
6. the multichannel power quality analysis device according to claim 1 based on 3G network, it is characterised in that: the number
Word signal processor is TMS320F28335, is 32 floating point processors, has 150MHz high speed processing ability, has 32 and floats
Point processing unit, 6 DMA channels support ADC, McBSP and EMIF, have the PWM on 18 tunnels to export, wherein having 6 tunnels is that TI is distinctive
The PWM of higher precision exports HRPWM, and 12 16 channel ADC have I2C, SPI, eCAN, Epwm, LVDS bus interface.
7. the multichannel power quality analysis device according to claim 3 based on 3G network, it is characterised in that: the electricity
It flows signal condition to be completed by the electromagnetic type current sensor with feedback winding, be put for one in parallel in the two sides of low-pressure side divider resistance
Fulgurite, discharge voltage are set smaller than the maximum voltage allowed equal to low-pressure side.
8. the multichannel power quality analysis device according to claim 1 based on 3G network, it is characterised in that: the number
The power quality data for acquiring and calculating is sent to master controller by SPI interface by word signal processor, and master controller passes through
LVDS interface is connect with screen display module；Pass through I2C interface is connect with key module；It is connect by SPI interface with 3G module.
9. the multichannel power quality analysis device according to claim 1 based on 3G network, it is characterised in that: the master
Controller is sent the power quality parameter of calculating in server by 3G module, and server connects computer, computer hair
It is instructed out to server, server accesses power quality analysis device by 3G module, makes power quality analysis device and service
Device, computer being integrally formed system.
10. the multichannel power quality analysis device according to claim 1 based on 3G network, it is characterised in that: described
Key module control display pattern include: VAH mode, waveform chart-pattern, power quality general view mode, the rapid drawdown mode that rises sharply,
Harmonic mode, m-Acetyl chlorophosphonazo mode, flickering mode, transient mode, uneven mode, power and power mode, surge current mode,
Trigger parameter checks mode interface.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108535576A (en) * | 2018-05-24 | 2018-09-14 | 国网辽宁省电力有限公司电力科学研究院 | Multichannel power quality analysis device based on 3G network |
| CN110456146A (en) * | 2019-09-04 | 2019-11-15 | 深圳宝龙达信创科技股份有限公司 | Power detection device and power detecting method |
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2018
- 2018-05-24 CN CN201820783887.XU patent/CN208255327U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108535576A (en) * | 2018-05-24 | 2018-09-14 | 国网辽宁省电力有限公司电力科学研究院 | Multichannel power quality analysis device based on 3G network |
| CN110456146A (en) * | 2019-09-04 | 2019-11-15 | 深圳宝龙达信创科技股份有限公司 | Power detection device and power detecting method |
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