CN104698345B - A kind of data acquisition processing system for small current earthing wire-selecting - Google Patents
A kind of data acquisition processing system for small current earthing wire-selecting Download PDFInfo
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- CN104698345B CN104698345B CN201510146119.4A CN201510146119A CN104698345B CN 104698345 B CN104698345 B CN 104698345B CN 201510146119 A CN201510146119 A CN 201510146119A CN 104698345 B CN104698345 B CN 104698345B
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Abstract
The present invention, which discloses, invents a kind of digital sampling and processing for small current earthing wire-selecting, the system includes zero sequence current signal processing module, data-interface CAN module, single-chip microcomputer signal processing module and power conversion processing module, processing is amplified to 5 rd harmonic signals again while processing zero sequence current signal fundamental wave, the signal to noise ratio for improving 5 subharmonic is advantageous to the comprehensive analysis of data, reduce wrong choosing and falsely drop, improve route selection accuracy rate；The present invention can detect 3 outlet lines simultaneously, hardware environment is provided for the faulty line selection principle such as " than the amplitude ratio phase algorithm " of line main frame, " 5 subharmonic algorithm ", the actual effect of whole system route selection is improved simultaneously, facilitate the extension of circuit, using RS485 bus communications can effective electromagnetism interference, communication distance is remote, networking is simple, the complexity of reduction system, cost is reduced, reduce system maintenance amount.Synchronous data collection and transmission, real-time is good, and response is fast, data prediction, anti-interference strong.
Description
Technical field
The invention belongs to field of relay protection in power, and in particular to a kind of data for small current earthing wire-selecting are adopted
Collect processing system.
Background technology
China 6-35KV widely used central point non-validity earthing mode of power distribution network, also known as small current neutral grounding system.
Failure more than 70% in small current neutral grounding system belongs to singlephase earth fault.
Traditional line selection apparatus only has a route selection main frame, and only the fundamental wave of zero sequence current signal or 5 subharmonic are divided
Analysis is compared, but signal to noise ratio very little of 5 subharmonic in fundamental wave, only accounts for 3% of fundamental wave or so, it is easy to by noise jamming, nothing
Method carries out effective integrated data to zero sequence signal and compared, and easily generation is falsely dropped, mistake is selected, and route selection accuracy rate is relatively low.
The content of the invention
The present invention proposes a kind of data acquisition processing system for small current earthing wire-selecting, solves and selects in the prior art
The problem of line accuracy rate is relatively low, hardware environment is provided for faulty line selection, have that real-time is good, response is fast and anti-interference strong excellent
Point.
The technical proposal of the invention is realized in this way：
A kind of data collecting system for small current earthing wire-selecting, it is characterised in that：The system is believed including zero-sequence current
Number processing module, data-interface CAN module, single-chip microcomputer signal processing module and power conversion processing module；
Single-chip microcomputer signal processing module include backup battery module, isolation circuit, MCU power filters processing module,
State indicator module, crystal oscillator module, restart module, insulating power supply, debugging interface module and STM32 data processing modules, it is described
Backup battery module, isolation circuit, MCU power filters processing module, state indicator module, crystal oscillator module, restart module, isolation
Power supply, the output end of debugging interface module are connected with the STM32 data processing modules；
The zero sequence current signal processing module is used to carry out data acquisition to the fundamental wave of zero sequence current signal and 5 subharmonic
And processing, the signal after processing are transported to the STM32 data processing modules；Zero sequence current signal processing module includes the first via
Zero sequence current signal processing module, the second road zero sequence current signal processing module and the 3rd road zero sequence current signal processing module,
The first via zero sequence current signal processing module, the second road zero sequence current signal processing module and the 3rd road zero sequence current signal
Processing module is connected with the single-chip microcomputer, and the single chip processing module handles three road zero sequence current signal processing modules simultaneously
The signal of transmission；
The zero sequence current signal processing module includes Current Mutual Inductance output signal processing module, power supply high-frequency signal filters
Processing module, common mode and amplification filter signal processing module, signal quantum conversion module are carried out by Y=-0.3 (X+5), by Y=
0.3 (X+5) carries out signal quantum conversion module, and 5 subharmonic carry out quantum conversion module by Y=-30X-1.5V, 5 subharmonic are pressed
Y=30X+1.5V carries out quantum conversion module, band pass filter circuit and power supply processing module；
The output end of the Current Mutual Inductance output signal processing module connects the common mode and amplification filtering signal transacting mould
The output end of block, the common mode and amplification filtering signal processing module connects described by Y=-0.3 (X+5) progress signals respectively
The input of quantum conversion module and the band pass filter circuit, it is described to carry out signal range swithching by Y=-0.3 (X+5)
The output end connection of module is described to carry out signal quantum conversion module by Y=0.3 (X+5), described to carry out letter by Y=0.3 (X+5)
The output end of number quantum conversion module connects the single-chip microcomputer signal processing module；
The input that 5 subharmonic is carried out quantum conversion module by Y=-30X-1.5V is connected at the single-chip microcomputer signal
Module is managed, output end connection 5 subharmonic that 5 subharmonic is carried out quantum conversion module by Y=-30X-1.5V presses Y=
30X+1.5V carries out the input of quantum conversion module, and 5 subharmonic carries out quantum conversion module by Y=30X+1.5V
Output end connects the single-chip microcomputer signal processing module.
The data-interface CAN module includes CAN data transmit-receive modules, data-storage module, RS232 interface module, number
According to memory module and signal isolation indicating module, the CAN data transmit-receive modules, data-storage module, RS232 interface module,
The input of data memory module and signal isolation indicating module is all connected with+3V power supplys, the CAN data transmit-receive modules, data
Deposit the output end of digital-to-analogue block, RS232 interface module, data memory module and signal isolation indicating module respectively with the STM32
Data processing module is connected；
The power conversion processing module includes+12V power filters processing module ,+5V power supplys module, -5V power supply modules
With+3V3 power supply modules, respectively offer+12V ,+5V ,+3.3V and -5V power supply.
Further, the band pass filter circuit includes wave filter and ratio adjustment circuit, the band logical of the wave filter
Input is connected by the resistance of two series connection with the low pass input of the wave filter；The band logical output end of the wave filter is also
It is connected by the resistance of two series connection with the signal input part of the wave filter；Described in the input connection of the ratio adjustment circuit
The output end of Current Mutual Inductance output signal processing module, the output end of the ratio adjustment circuit connect the signal of the wave filter
Input.
Further, the model MAX274 of the bandpass filter, the model list of the STM32 data processing modules
Piece machine STM32F103.
Further, the single-chip microcomputer signal processing module includes backup battery module, isolation circuit, MCU power filters
Processing module, state indicator module, crystal oscillator module, restart module, insulating power supply, debugging interface module and STM32 data processings
Module, the terminals VBAT of the terminals VBAT D connections STM32 data processing modules of the backup battery module；Institute
The terminals OSC32-OUT and terminals OSC32-IN for stating crystal oscillator module connect connecing for the STM32 data processing modules respectively
Line end PC15-OSC32-OUT and terminals PC14-OSC32-IN, the terminals OSC OUT and terminals of the crystal oscillator module
OSC IN connect the terminals PD1 and terminals PD0 of the STM32 data processing modules, the wiring of the crystal oscillator module respectively
Hold the BOOT0 connections STM32 data processing modules terminals BOOT0；Described in the terminals NRST connections for restarting module
The terminals NRST of STM32 data processing modules；At the terminals LED connections STM32 data of the state indicator module
Manage the terminals PB5 of module；The terminals CANL and terminals CANH of the debugging interface module connect the CAN numbers respectively
According to the terminals CANL and terminals CANH of transceiver module, the terminals PB4 of the debugging interface module, terminals PB5, connect
Line end PA15, terminals PB10, terminals PB11, terminals PA11, terminals PA12, terminals PC13, terminals PA7 and connect
Line end PA6 connects the terminals PB4 of the STM32 data processing modules, terminals PB5, terminals PA15, connect respectively
Line end PB10, terminals PB11, terminals PA11, terminals PA12, terminals PC13-RTC, terminals PA7 and terminals
PA6；The terminals MCU 3V3 and terminals MCU-GND of the MCU power filters processing module connect the STM32 numbers respectively
According to the terminals VDD and terminals VSS of processing module；MCU-GND points of the terminals MCU 3V3 and terminals of the isolation circuit
The terminals VDD and terminals VSS of the STM32 data processing modules are not connected.
Further, the terminals CANH of the CAN data transmit-receive modules connects the debugging interface with terminals CANL
The terminals CANH and terminals CANL of module, the terminals CAN TXD and terminals CAN of the CAN data transmit-receive modules
The terminals PB8 and terminals PB9 of the RXD connections STM32 data processing modules；The terminals of the RS232 interface module
UART1RX and terminals UART1 EN terminals UART1TX connects the terminals of the STM32 data processing modules respectively
PA10, terminals PA8 and terminals PA9, the RS232 interface module；Terminals SPI CS of the data memory module,
Terminals SPI SO and terminals NRST connect the terminals PB12 of the STM32 data processing modules, terminals PB14 respectively
With connection jaws NRST；The terminals SCL and terminals SDA of the data memory module connect the STM32 data processings respectively
The terminals PB6 and terminals PB7 of module；Terminals K1, terminals K2 and terminals the K3 difference of the signal isolation module
Connect the terminals PB0, terminals PB1 and terminals PB2 of the STM32 data processing modules.
Beneficial effect：While the present invention is handled zero sequence current signal fundamental wave and 5 rd harmonic signals are put
Big processing, the signal to noise ratio for improving 5 subharmonic are advantageous to the comprehensive analysis of data, reduce wrong choosing and falsely drop, improve route selection standard
True rate；The present invention can detect 3 outlet lines simultaneously, be that " than amplitude ratio phase algorithm ", " the 5 subharmonic algorithm " of line main frame etc. are comprehensive
Close location design and hardware environment is provided, while improve the actual effect of whole system route selection, facilitate the extension of circuit, use
RS485 bus communications can effective electromagnetism interference, communication distance is remote, and networking is simple, reduces the complexity of system, reduces into
This, reduces system maintenance amount.Synchronous data collection and transmission, real-time is good, and response is fast, data prediction, anti-interference strong.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the system block diagram of the present invention.
The 3rd road zero sequence current signal that Fig. 2 is the present invention handles current signal mutual inductance output signal processing module in module
The circuit diagram being connected with common mode and amplification filtering signal processing module.
Fig. 3 is that the 3rd road zero sequence current signal of the present invention handles the circuit for being used for fundamental signal range swithching in module
Figure.
Fig. 4 is that the 3rd road zero sequence current signal of the present invention handles the electricity for being used for 5 rd harmonic signal range swithchings in module
Lu Tu.
Fig. 5 is that the 3rd road zero sequence current signal of the present invention handles the circuit diagram of band pass filter circuit in module.
The second road zero sequence current signal that Fig. 6 is the present invention handles current signal mutual inductance output signal processing module in module
The circuit diagram being connected with common mode and amplification filtering signal processing module.
Fig. 7 is that the second road zero sequence current signal of the present invention handles the circuit for being used for fundamental signal range swithching in module
Figure.
Fig. 8 is that the second road zero sequence current signal of the present invention handles the electricity for being used for 5 rd harmonic signal range swithchings in module
Lu Tu.
Fig. 9 is that the second road zero sequence current signal of the present invention handles the circuit diagram of band pass filter circuit in module.
Figure 10 is that the first via zero sequence current signal of the present invention handles current signal mutual inductance output signal processing mould in module
The circuit diagram that block is connected with common mode and amplification filtering signal processing module.
Figure 11 is that the first via zero sequence current signal of the present invention handles the circuit for being used for fundamental signal range swithching in module
Figure.
Figure 12 is that the first via zero sequence current signal of the present invention handles the electricity for being used for 5 rd harmonic signal range swithchings in module
Lu Tu.
Figure 13 is that the first via zero sequence current signal of the present invention handles the circuit diagram of band pass filter circuit in module.
Figure 14 is the circuit diagram of CAN data transmit-receive modules in electric data-interface CAN module of the invention.
Figure 15 and Figure 17 is the circuit diagram of data memory module in electric data-interface CAN module of the invention.
Figure 16 is the circuit diagram of RS232 interface module in electric data-interface CAN module of the invention.
Figure 18 is the circuit diagram of signal isolation indicating module in electric data-interface CAN module of the invention.
Figure 19 is the circuit diagram of the STM32 signal processing modules of the present invention.
Figure 20 is the circuit diagram of the state indicator module in the STM32 signal processing modules of the present invention.
Figure 21 is the circuit diagram of the debugging interface module in the STM32 signal processing modules of the present invention.
Figure 22, Figure 23, Figure 24 and Figure 25 are respectively that+12V power filters are handled in power conversion processing module in the present invention
Module ,+5V power supplys module, -5V power supplys module and+3V3 power supply modular circuit figures.
10-the three road zero sequence current signal processing module 20-the second road zero sequence current signal processing module
30-first via zero sequence current signal processing module 40-data-interface CAN module 50-single-chip microcomputer signal processing mould
Group 60-power conversion processing module
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Reference picture 1, a kind of data collecting system for small current earthing wire-selecting, the system are included at zero sequence current signal
Manage module, data-interface CAN module 40, single-chip microcomputer signal processing module 50 and power conversion processing module 60, zero-sequence current letter
Obtain handling 50HZ signals and 250HZ signals after the processing of number processing module, and 50HZ signals and 250HZ signals are transported to simultaneously
Single-chip microcomputer signal handles module 50, and power conversion processing module 60 is that single-chip microcomputer signal handles module conveying+3V voltages, and data connect
Mouth CAN module 40 connects single-chip microcomputer signal processing module and carried out data transmission；
Reference picture 2 to Figure 13, the zero sequence current signal processing module includes first via zero sequence current signal processing module
30th, the second road zero sequence current signal processing module 20 and the 3rd road zero sequence current signal processing module 10, the first via zero sequence
Current signal processing module 30, the second road zero sequence current signal processing module 20 and the 3rd road zero sequence current signal processing module 10
It is connected with the single-chip microcomputer, the single-chip microcomputer processing module handles the letter of three road zero sequence current signal processing module transmission simultaneously
Number.
The zero sequence current signal processing module includes Current Mutual Inductance output signal processing module, power supply high-frequency signal filters
Processing module, common mode and amplification filter signal processing module, signal quantum conversion module are carried out by Y=-0.3 (X+5), by Y=
0.3 (X+5) carries out signal quantum conversion module, and 5 subharmonic carry out quantum conversion module by Y=-30X-1.5V, 5 subharmonic are pressed
Y=30X+1.5V carries out quantum conversion module, band pass filter circuit and power supply processing module,
The output end of the Current Mutual Inductance output signal processing module connects the common mode and amplification filtering signal transacting mould
The output end of block, the common mode and amplification filtering signal processing module connects described by Y=-0.3 (X+5) progress signals respectively
The input of quantum conversion module and the band pass filter circuit, it is described to carry out signal range swithching by Y=-0.3 (X+5)
The output end connection of module is described to carry out signal quantum conversion module by Y=0.3 (X+5), described to carry out letter by Y=0.3 (X+5)
The output end of number quantum conversion module connects the single-chip microcomputer signal processing module；
The input that 5 subharmonic is carried out quantum conversion module by Y=-30X-1.5V is connected at the single-chip microcomputer signal
Module is managed, output end connection 5 subharmonic that 5 subharmonic is carried out quantum conversion module by Y=-30X-1.5V presses Y=
30X+1.5V carries out the input of quantum conversion module, and 5 subharmonic carries out quantum conversion module by Y=30X+1.5V
Output end connects the single-chip microcomputer signal processing module.
The band pass filter circuit includes wave filter and ratio adjustment circuit, and the band logical input of the wave filter is logical
The resistance for crossing two series connection is connected with the low pass input of the wave filter；The band logical output end of the wave filter also passes through two strings
The resistance of connection is connected with the signal input part of the wave filter；It is defeated that the input of the ratio adjustment circuit connects the Current Mutual Inductance
Go out the output end of signal processing module, the output end of the ratio adjustment circuit connects the signal input part of the wave filter；
The model MAX274 of the bandpass filter, the model single-chip microcomputer of the STM32 data processing modules
STM32F103；
The terminals VS1_A_AD and terminals VS1_5_AD of first via zero sequence current signal processing module connect list respectively
Piece machine STM32F103 terminals PA5 and terminals PA4；
The terminals VS2_A_AD and terminals VS2_5_AD of second road zero sequence current signal processing module connect list respectively
Piece machine STM32F103 terminals PA3 and terminals PA2；
The terminals VS3_A_AD and terminals VS3_5_AD of 3rd road zero sequence current signal processing module connect list respectively
Piece machine STM32F103 terminals PA1 and terminals PA0.
Referring to shown in Figure 14 to 18, described in the terminals CANH of the CAN data transmit-receive modules connects with terminals CANL
The terminals CANH of debugging interface module and terminals CANL, the terminals CAN TXD of the CAN data transmit-receive modules and wiring
Hold the terminals PB8 and terminals PB9 of the CAN RXD connections STM32 data processing modules；The RS232 interface module
Terminals UART1RX and terminals UART1EN terminals UART1TX connects the wiring of the STM32 data processing modules respectively
PA10, terminals PA8 and terminals PA9 are held, the RS232 interface module；The terminals SPI of the data memory module
CS, terminals SPI SO and terminals NRST connect terminals PB12, the terminals of the STM32 data processing modules respectively
PB14 and connection jaws NRST；The terminals SCL and terminals SDA of the data memory module connect the STM32 data respectively
The terminals PB6 and terminals PB7 of processing module；Terminals K1, terminals K2 and the terminals K3 of the signal isolation module
The terminals PB0, terminals PB1 and terminals PB2 of the STM32 data processing modules are connected respectively.
Referring to shown in Figure 19 to 21, the single-chip microcomputer signal processing module 50 include backup battery module, isolation circuit,
MCU power filters processing module, state indicator module, crystal oscillator module, restart module, insulating power supply, debugging interface module and
STM32 data processing modules, the terminals VBAT D connection STM32 data processing modules of the backup battery module connect
Line end VBAT；The terminals OSC32-OUT and terminals OSC32-IN of the crystal oscillator module connect the STM32 data respectively
The terminals PC15-OSC32-OUT and terminals PC14-OSC32-IN of processing module, the terminals OSC of the crystal oscillator module
OUT and terminals OSC IN connects the terminals PD1 and terminals PD0 of the STM32 data processing modules, the crystalline substance respectively
The terminals BOOT0 connections STM32 data processing modules terminals BOOT0 for module of shaking；The terminals for restarting module
The terminals NRST of the NRST connections STM32 data processing modules；The terminals LED connections institute of the state indicator module
State the terminals PB5 of STM32 data processing modules；The terminals CANL and terminals CANH of the debugging interface module connect respectively
Connect the CAN data transmit-receive modules terminals CANL and terminals CANH, the terminals PB4 of the debugging interface module,
Terminals PB5, terminals PA15, terminals PB10, terminals PB11, terminals PA11, terminals PA12, terminals PC13,
Terminals PA7 and terminals PA6 connect respectively the terminals PB4 of the STM32 data processing modules, terminals PB5,
Terminals PA15, terminals PB10, terminals PB11, terminals PA11, terminals PA12, terminals PC13-RTC, terminals
PA7 and terminals PA6；The terminals MCU 3V3 and terminals MCU-GND of the MCU power filters processing module are connected respectively
The terminals VDD and terminals VSS of the STM32 data processing modules；The terminals MCU 3V3 of the isolation circuit and wiring
End MCU-GND connects the terminals VDD and terminals VSS of the STM32 data processing modules respectively.
The terminals CANH and terminals CANL of the CAN data transmit-receive modules connect the wiring of the debugging interface module
Hold described in CANH and terminals CANL, terminals CAN TXD and terminals the CAN RXD of the CAN data transmit-receive modules connect
The terminals PB8 and terminals PB9 of STM32 data processing modules；The terminals UART1RX of the RS232 interface module and connect
Line end UART1EN terminals UART1TX connects the terminals PA10 of the STM32 data processing modules, terminals PA8 respectively
With terminals PA9, the RS232 interface module；Terminals SPI CS, the terminals SPI SO of the data memory module and
Terminals NRST connects the terminals PB12, terminals PB14 and connection jaws NRST of the STM32 data processing modules respectively；Institute
The terminals SCL and terminals SDA for stating data memory module connect the terminals PB6 of the STM32 data processing modules respectively
With terminals PB7；Terminals K1, terminals K2 and the terminals K3 of the signal isolation module connect the STM32 numbers respectively
According to the terminals PB0, terminals PB1 and terminals PB2 of processing module.
Referring to shown in Figure 22, Figure 23, Figure 24 and Figure 25, the power conversion processing module 60 includes+12V power filters
Processing module ,+5V power supplys module, -5V power supplys module and+3V3 power supply modules, respectively offer+12V ,+5V ,+3.3V and -5V
Power supply.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (5)
- A kind of 1. data collecting system for small current earthing wire-selecting, it is characterised in that：The system includes zero sequence current signal Processing module, data-interface CAN module (40), single-chip microcomputer signal processing module (50) and power conversion processing module (60)；Single-chip microcomputer signal processing module (50) include backup battery module, isolation circuit, MCU power filters processing module, State indicator module, crystal oscillator module, restart module, insulating power supply, debugging interface module and STM32 data processing modules, it is described Backup battery module, isolation circuit, MCU power filters processing module, state indicator module, crystal oscillator module, restart module, isolation Power supply, the output end of debugging interface module are connected with the STM32 data processing modules；The zero sequence current signal processing module is used to carry out data acquisition and place to the fundamental wave of zero sequence current signal and 5 subharmonic Reason, the signal after processing are transported to the STM32 data processing modules；Zero sequence current signal processing module includes first via zero sequence Current signal processing module (30), the second road zero sequence current signal processing module (20) and the 3rd road zero sequence current signal processing mould Block (10), the first via zero sequence current signal processing module (30), the second road zero sequence current signal processing module (20) and Three road zero sequence current signal processing modules (10) are connected with the single-chip microcomputer, and the single chip processing module handles three tunnels simultaneously The signal of zero sequence current signal processing module transmission；The zero sequence current signal processing module includes Current Mutual Inductance output signal processing module, power supply high-frequency signal filtering process Module, common mode and amplification filter signal processing module, signal quantum conversion module are carried out by Y=-0.3 (X+5), by Y=0.3 (X + 5) signal quantum conversion module is carried out, 5 subharmonic carry out quantum conversion module by Y=-30X-1.5V, 5 subharmonic press Y=30X + 1.5V carries out quantum conversion module, band pass filter circuit and power supply processing module；The output end of the Current Mutual Inductance output signal processing module connects the common mode and amplification filtering signal processing module, institute The output end for stating common mode and amplification filtering signal processing module connects and described carry out signal range by Y=-0.3 (X+5) and turn respectively The input of block and the band pass filter circuit is changed the mold, it is described to carry out the defeated of signal quantum conversion module by Y=-0.3 (X+5) Go out to hold connection described and carry out signal quantum conversion module by Y=0.3 (X+5), it is described to turn by Y=0.3 (X+5) progress signal ranges The output end for changing the mold block connects the single-chip microcomputer signal processing module；The input that 5 subharmonic is carried out quantum conversion module by Y=-30X-1.5V connects the single-chip microcomputer signal processing mould Group, output end connection 5 subharmonic that 5 subharmonic is carried out quantum conversion module by Y=-30X-1.5V press Y=30X+ 1.5V carries out the input of quantum conversion module, and 5 subharmonic is carried out the output end of quantum conversion module by Y=30X+1.5V Connect the single-chip microcomputer signal processing module；The data-interface CAN module (40) includes CAN data transmit-receive modules, data-storage module, RS232 interface module, number According to memory module and signal isolation indicating module, the CAN data transmit-receive modules, data-storage module, RS232 interface module, The input of data memory module and signal isolation indicating module is all connected with+3V power supplys, the CAN data transmit-receive modules, data Deposit the output end of digital-to-analogue block, RS232 interface module, data memory module and signal isolation indicating module respectively with the STM32 Data processing module is connected；The power conversion processing module (60) includes+12V power filters processing module ,+5V power supplys module, -5V power supply modules With+3V3 power supply modules, respectively offer+12V ,+5V ,+3.3V and -5V power supply.
- A kind of 2. data collecting system for small current earthing wire-selecting as claimed in claim 1, it is characterised in that：The band Bandpass filter circuit includes wave filter and ratio adjustment circuit, and the band logical input of the wave filter passes through the electricity of two series connection Resistance is connected with the low pass input of the wave filter；Resistance and the filter of the band logical output end of the wave filter also by two series connection The signal input part of ripple device is connected；The input of the ratio adjustment circuit connects the Current Mutual Inductance output signal processing module Output end, the output end of the ratio adjustment circuit connects the signal input part of the wave filter.
- A kind of 3. data collecting system for small current earthing wire-selecting as claimed in claim 1, it is characterised in that：The band The model MAX274 of bandpass filter, the model single-chip microcomputer STM32F103 of the STM32 data processing modules.
- A kind of 4. data collecting system for small current earthing wire-selecting as claimed in claim 1, it is characterised in that：The list Piece machine signal transacting module (50) includes backup battery module, isolation circuit, MCU power filters processing module, state instruction mould Block, crystal oscillator module, restart module, insulating power supply, debugging interface module and STM32 data processing modules, the backup battery mould The terminals VBAT of the terminals VBAT D connections STM32 data processing modules of block；The terminals of the crystal oscillator module OSC32-OUT and terminals OSC32-IN connects the terminals PC15-OSC32-OUT of the STM32 data processing modules respectively Connect respectively described with terminals PC14-OSC32-IN, terminals OSC OUT and terminals the OSC IN of the crystal oscillator module The terminals PD1 and terminals PD0 of STM32 data processing modules, described in the terminals BOOT0 connections of the crystal oscillator module STM32 data processing module terminals BOOT0；The terminals NRST connections STM32 data processings mould for restarting module The terminals NRST of block；The terminals of the terminals LED connections STM32 data processing modules of the state indicator module PB5；The terminals CANL and terminals CANH of the debugging interface module connect the wiring of the CAN data transmit-receive modules respectively Hold CANL and terminals CANH, terminals PB4, terminals PB5, terminals PA15, the terminals of the debugging interface module PB10, terminals PB11, terminals PA11, terminals PA12, terminals PC13, terminals PA7 and terminals PA6 are connected respectively Terminals PB4, terminals PB5, terminals PA15, terminals PB10, the terminals of the STM32 data processing modules PB11, terminals PA11, terminals PA12, terminals PC13-RTC, terminals PA7 and terminals PA6；The MCU power supplys filter The terminals MCU 3V3 and terminals MCU-GND of ripple processing module connect the terminals of the STM32 data processing modules respectively VDD and terminals VSS；The terminals MCU 3V3 and terminals MCU-GND of the isolation circuit connect the STM32 numbers respectively According to the terminals VDD and terminals VSS of processing module.
- A kind of 5. data collecting system for small current earthing wire-selecting as claimed in claim 4, it is characterised in that：It is described The terminals CANH and terminals CANL of CAN data transmit-receive modules connect terminals CANH and the wiring of the debugging interface module CANL, terminals CAN TXD and terminals the CAN RXD of the CAN data transmit-receive modules is held to connect the STM32 data processings The terminals PB8 and terminals PB9 of module；The terminals UART1RX and terminals UART1EN of the RS232 interface module connect Line end UART1TX connects the terminals PA10, terminals PA8 and terminals PA9 of the STM32 data processing modules, institute respectively State RS232 interface module；Terminals SPI CS, terminals SPI SO and terminals the NRST difference of the data memory module Connect the terminals PB12, terminals PB14 and connection jaws NRST of the STM32 data processing modules；The data memory module Terminals SCL and terminals SDA connect the terminals PB6 and terminals PB7 of the STM32 data processing modules respectively；Institute The terminals K1, terminals K2 and terminals K3 for stating signal isolation module connect connecing for the STM32 data processing modules respectively Line end PB0, terminals PB1 and terminals PB2.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510146119.4A CN104698345B (en) | 2015-03-31 | 2015-03-31 | A kind of data acquisition processing system for small current earthing wire-selecting |
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|---|---|---|---|
| CN201510146119.4A CN104698345B (en) | 2015-03-31 | 2015-03-31 | A kind of data acquisition processing system for small current earthing wire-selecting |
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| CN104698345A CN104698345A (en) | 2015-06-10 |
| CN104698345B true CN104698345B (en) | 2018-03-13 |
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| CN201510146119.4A Active CN104698345B (en) | 2015-03-31 | 2015-03-31 | A kind of data acquisition processing system for small current earthing wire-selecting |
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| CN104993806A (en) * | 2015-08-14 | 2015-10-21 | 中国兵器工业集团第二一四研究所苏州研发中心 | Programmable active band-pass filter and amplification circuit |
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| CN2814430Y (en) * | 2005-08-22 | 2006-09-06 | 保定中恒电气有限公司 | Small current grounding select switch with arc suppression coil |
| CN102768326A (en) * | 2012-07-04 | 2012-11-07 | 南京工业大学 | Compensation power grid single-phase earth fault line selection device and method |
| CN103728538A (en) * | 2013-12-30 | 2014-04-16 | 国家电网公司 | Ground fault line selecting method for small current grounding system |
| CN104316819A (en) * | 2014-10-28 | 2015-01-28 | 许继电气股份有限公司 | Small current grounding line selection method based on zero-sequence currents |
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| KR920006983B1 (en) * | 1989-12-31 | 1992-08-24 | 금성전선 주식회사 | Insulation continuity check in-line detecting apparatus of enamel cable |
| JP3425305B2 (en) * | 1996-09-02 | 2003-07-14 | 株式会社日立製作所 | Ground fault line selective protection relaying method and device |
| CN200941546Y (en) * | 2006-07-19 | 2007-08-29 | 南京因泰莱配电自动化设备有限公司 | On-line line selection protector of single-phase earthing fault |
| CN201345541Y (en) * | 2008-12-25 | 2009-11-11 | 南京因泰莱配电自动化设备有限公司 | Low current grounding intelligent line-selection device |
| CN201498981U (en) * | 2009-07-23 | 2010-06-02 | 江苏省电力公司常州供电公司 | 10KV Low-current grounding wire selection system |
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| CN2814430Y (en) * | 2005-08-22 | 2006-09-06 | 保定中恒电气有限公司 | Small current grounding select switch with arc suppression coil |
| CN102768326A (en) * | 2012-07-04 | 2012-11-07 | 南京工业大学 | Compensation power grid single-phase earth fault line selection device and method |
| CN103728538A (en) * | 2013-12-30 | 2014-04-16 | 国家电网公司 | Ground fault line selecting method for small current grounding system |
| CN104316819A (en) * | 2014-10-28 | 2015-01-28 | 许继电气股份有限公司 | Small current grounding line selection method based on zero-sequence currents |
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