CN209462083U - A kind of terminal unit control device for power distribution automation - Google Patents
A kind of terminal unit control device for power distribution automation Download PDFInfo
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- CN209462083U CN209462083U CN201920327326.3U CN201920327326U CN209462083U CN 209462083 U CN209462083 U CN 209462083U CN 201920327326 U CN201920327326 U CN 201920327326U CN 209462083 U CN209462083 U CN 209462083U
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Abstract
The utility model discloses a kind of terminal unit control devices for power distribution automation, including AC signal conditioning circuit, remote signalling input circuit, remote control output circuit, direct current signal conditioning circuit and dsp processor, the AC signal conditioning circuit connects with the ADC input terminal in Current Transmit, voltage transformer pt and dsp processor, the output end of dsp processor connects with remote control output circuit, and the input terminal of dsp processor 5 connects with remote signalling input circuit.This is used for the terminal unit control device of power distribution automation, it has developed using DSP as hardware core, the measurement to network voltage, electric current is realized using sampling techniques, the electrical parameters such as electric current, voltage effective value, active power and power factor are calculated according to alternating data acquisition, the calculation processing power of DSP fast powerful is given full play to, conscientiously the requirement for meeting the real-time and complexity of electric power supervisory control, has important practical significance to the development of power distribution automation.
Description
Technical field
The utility model relates to Distribution Automation Technology field, specially a kind of terminal unit control for power distribution automation
Device processed.
Background technique
Power distribution automation is the effective means for improving power supply reliability and power supply quality, terminal unit control device (FTU)
It is the key that power distribution automation smart machine, is the clumsy control unit of its base, the bridge for playing link switch and SCADA system is made
With, be for realizing to network system route, cable electrical parameter carry out data acquisition and control panel switches automation set
It is standby.It also has fault-signal (phase fault, single-phase earthing) capturing ability, in conjunction with primary in addition to the four remote control function with RTU
(breaker, on-load switch, box type transformer, loop-network switch cabinet etc.) networking cooperation is switched, the event of route and cable can be completed
The normal power supply for hindering diagnosis, fault section isolation and non-faulting section, in addition, also having the function of failure wave-recording etc..It improves and matches
The automatization level of power grid, key are the performance of raising terminal unit control device FTU, and with power supply network inspection in recent years
Survey and the rapid development of embedded technology, propose requirements at the higher level to the system reliability and operational precision of FTU.
Utility model content
The purpose of this utility model is to provide a kind of terminal unit control devices for power distribution automation, have abundant
The calculation processing power of DSP fast powerful has been played, has met the requirement of the real-time and complexity of electric power supervisory control conscientiously, it is right
The advantages of development of power distribution automation has important practical significance solves the problems of the prior art.
To achieve the above object, the utility model provides the following technical solutions: an a kind of distant place for power distribution automation is whole
Hold control device, including AC signal conditioning circuit, remote signalling input circuit, remote control output circuit, direct current signal conditioning circuit and
ADC in dsp processor, the AC signal conditioning circuit and Current Transmit, voltage transformer pt and dsp processor
Input terminal connects, and the output end of dsp processor connects with remote control output circuit, the input terminal of dsp processor 5 and remote signalling input electricity
Road connects, and DSP processor also drives with direct current signal conditioning circuit, keyboard LED, jtag interface, RS232/485 interface, CAN
Interface, SPAM and EPROM connect, and the input terminal of the Current Transmit and voltage transformer pt inputs phase with of ac
It connects, the input terminal of direct current signal conditioning circuit connects with DC quantity input.
Preferably, the port the V1N1 series resistance R1 of the HTP205B chip in the AC signal conditioning circuit connects in PT1
+ on, the port V1N2 of HTP205B chip connects on PT1-, the port the V01 and V02 parallel resistance R2 and capacitor of HTP205B chip
C1 is connect respectively on the positive and negative anodes of AD sampling.
Preferably, the parallel diode D1 of port 1 and 2 of the TLP521-4 optocoupler G1 in the remote signalling input circuit, port 1
Current-limiting resistance R1 is also met, port 2 connects in bus, and 3 connecting resistance R2 of port, the capacitor C1 of TLP521-4 optocoupler G1 connects in amplifier
On the anode of LM339, the port 4 of TLP521-4 optocoupler G1 meets the capacitor C1 other end, variable resistance R3 and capacitor C2 and connects in amplifier
On the cathode of LM339, output end series resistance R4, the variable resistance R3 other end and the resistance R2 other end of amplifier LM339,
The parallel diode D2 of port 1 and 2 of LP521-4 optocoupler G3, port 1 also meet current-limiting resistance R5, and port 2 connects in bus,
3 connecting resistance R6 of port, the capacitor C3 of TLP521-4 optocoupler G2 connects on the anode of amplifier LM339, the end of TLP521-4 optocoupler G2
Mouth 4 meets the capacitor C3 other end, variable resistance R7 and capacitor C4 and connects on the cathode of amplifier LM339, the output end string of amplifier LM339
Join resistance R8, the variable resistance R7 other end and the resistance R6 other end, resistance R6 and resistance R2 series connection.
Preferably, in the remote control output circuit on the end the I/O Jie trigger of dsp processor, the pin Q0 of trigger
It is connect on one end of optocoupler respectively with Q1, the other end series diode D3 of optocoupler connects on relay.
Compared with prior art, the beneficial effects of the utility model are as follows:
This is used for the terminal unit control device of power distribution automation, has developed using DSP as hardware core, uses AC sampling
Principle realizes the measurement to network voltage, electric current, and electric current, voltage effective value, active power is calculated according to alternating data acquisition
With the electrical parameters such as power factor, the calculation processing power of DSP fast powerful is given full play to, has met electric power supervisory control conscientiously
The requirement of real-time and complexity has important practical significance to the development of power distribution automation.
Detailed description of the invention
Fig. 1 is the module map of the utility model；
Fig. 2 is the AC signal conditioning circuit schematic diagram of the utility model；
Fig. 3 is the remote signalling input circuit schematic diagram of the utility model；
Fig. 4 is the remote control output circuit schematic diagram of the utility model.
In figure: 1, AC signal conditioning circuit；11, Current Transmit；12, voltage transformer pt；2, remote signalling input electricity
Road；3, it is remotely controlled output circuit；4, direct current signal conditioning circuit；5, dsp processor；51, keyboard LED；52, jtag interface；53,
RS232/485 interface；54, CAN driving interface；55,SPAM；56,EPROM；6, of ac inputs；7, DC quantity inputs.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Referring to Fig. 1, a kind of terminal unit control device for power distribution automation, including AC signal conditioning circuit 1,
Remote signalling input circuit 2, remote control output circuit 3, direct current signal conditioning circuit 4 and dsp processor 5, AC signal conditioning circuit 1 with
ADC input terminal in Current Transmit 11, voltage transformer pt 12 and DSP processor 5 connects, the output of dsp processor 5
End connects with output circuit 3 is remotely controlled, and the input terminal of dsp processor 5 connects with remote signalling input circuit 2, and dsp processor 5 is also and directly
Flow signal conditioning circuit 4, keyboard LED51, jtag interface 52, RS232/485 interface 53, CAN driving interface 54, SPAM55 and
EPROM56 connects, and the input terminal of Current Transmit 11 and voltage transformer pt 12 connects with of ac input 6, direct current letter
The input terminal of number conditioning circuit 4 connects with DC quantity input 7.
Dsp processor 5 and considers cost due to the requirement of the real-time high-speed demands and algorithm of data processing, using number
Core processor of the word signal processing chip as terminal unit control device, DSP are that one kind can be realized respectively real-time, quickly
The microprocessor of kind digital signal processing algorithm control, can be widely used in communication, radar, sonar, voice and image procossing
Equal fields.
Direct current signal conditioning circuit 4, other than the measurement of AC analogue signal, it is also necessary to which DC simulation signal is turned
Change, commonly used in monitoring supply voltage and battery voltage, to realize the acquisition function of power management module, due to PT, CT without
Method transmits DC component, and the scheme for AC signal conditioning is with regard to helpless at this time, and one of DC simulation signal isolation
Preferable selection is using linear optical coupling, and the separation principle and common optical coupler of linear optical coupling, only will be common without what difference
The single-shot list of optocoupler is received mode and is slightly changed, increase one for feedback light receive circuit and be used to feed back, in this way, two light
It is nonlinear for receiving circuit all, but the nonlinear characteristic that two light receive circuit is the same, so that it may logical by feeding back
The non-linear of road offsets the non-linear of through path, to realize the purpose of linear isolation.
For the CAN bus that CAN driving interface 54 connects as the remote communication interface with higher level substation, communication media is shielding
Twisted pair, using CAN2.0B agreement, using RS232 interface as local communication interface, for field adjustable and neighbouring with other
The communication network of smart machine.
Referring to Fig. 2, the port the V1N1 series resistance R1 of the HTP205B chip in AC signal conditioning circuit 1 connects in PT1
+ on, the port V1N2 of HTP205B chip connects on PT1-, the port the V01 and V02 parallel resistance R2 and electricity of HTP205B chip
Hold C1 to connect respectively on the positive and negative anodes of AD sampling.
The main measurement object of telemetering is the signals such as three-phase alternating voltage and electric current on power supply network, the amplitude of these signals
It is all very big, and general acquisition system can only convert small voltage signal, therefore cannot directly measure, it is contemplated that Electro Magnetic Compatibility,
It must electrically be isolated between incoming line and device internal wiring, therefore, various linearly to be collected can be converted to number
According to acquisition system acceptable small voltage signal, and isolation electrically is provided, usually optional measurement type PT and CT is realized
This function matches in high-precision AD sample circuit to make the analog signal of input sample required signal with AD,
Conditioning circuit usually is added in AD sample circuit front end, to reduce and translate the signal to be sampled, to make the signal after conditioning
It is suitble to the simulation input requirement of converter, analog quantity is become converter acceptable voltage range, then carries out mould
Number conversion, alternating voltage, current signal from PT, CT are filtered through RC, then are connected on the input terminal of converter through amplifier
Carry out analog-to-digital conversion.
Referring to Fig. 3, the parallel diode D1 of port 1 and 2 of the TLP521-4 optocoupler G1 in remote signalling input circuit 2, port 1
Current-limiting resistance R1 is also met, port 2 connects in bus, and 3 connecting resistance R2 of port, the capacitor C1 of TLP521-4 optocoupler G1 connects in amplifier
On the anode of LM339, the port 4 of TLP521-4 optocoupler G1 meets the capacitor C1 other end, variable resistance R3 and capacitor C2 and connects in amplifier
On the cathode of LM339, output end series resistance R4, the variable resistance R3 other end and the resistance R2 other end of amplifier LM339,
The parallel diode D2 of port 1 and 2 of LP521-4 optocoupler G3, port 1 also meet current-limiting resistance R5, and port 2 connects in bus,
3 connecting resistance R6 of port, the capacitor C3 of TLP521-4 optocoupler G2 connects on the anode of amplifier LM339, the end of TLP521-4 optocoupler G2
Mouth 4 meets the capacitor C3 other end, variable resistance R7 and capacitor C4 and connects on the cathode of amplifier LM339, the output end string of amplifier LM339
Join resistance R8, the variable resistance R7 other end and the resistance R6 other end, resistance R6 and resistance R2 series connection.
The input of the main completion status signal of remote signalling input circuit 2, there is 16 tunnel remote signalling input, and remote signalling status signal mainly comes
From on-pole switch point/conjunction state, a distant place/locality state, battery put into state, external power supply power loss etc..
Interference when remote signalling is as signal source itself is bigger, and its distance is generally all distant, interferes ratio on the way
Larger, so remote signalling will generally use quarantine measures, the part interfered from circuit interference source and easily keeps apart, makes distant
Letter front-end circuit and back-end circuit only keep signal contact, but the connection of electricity does not occur directly, and the essence of isolation is introducing
Interfering channel cutting, to achieve the purpose that isolation interference, the signal input amplifier LM339 anode after light-coupled isolation, cathode is then
The threshold voltage modulated by adjustable resistance R3 is connect, which works in saturation state, i.e., when remote signals are higher than threshold voltage,
Output is+5V, otherwise output is -5V, and for playing a protective role when being reversely connected voltage, resistance R1 plays limitation by diode D1 and D2
The effect of electric current, filter capacitor can prevent the interference of high-frequency signal, it should be noted that the input terminal of light-coupled isolation and output
End will be powered using different electrical power, isolation transformer module, and the value of current-limiting resistance R1 is suitable, and R is excessive, and optocoupler cannot be reliable
Conducting, on the contrary it easily causes front end backward dioded to damage or shortens the optocoupler service life, and front end current-limiting resistance is 30k/1W.
Referring to Fig. 4, in remote control output circuit 3 on the end the I/O Jie trigger of dsp processor 5, the pin Q0 of trigger
It is connect on one end of optocoupler respectively with Q1, the other end series diode D3 of optocoupler connects on relay.
The I/O mouth of DSP exports 8 control signals, and relay exports all the way for every 2 signals control, can control 4 tunnel relays altogether
Device output.If DSP exports a pair of control signal, the signal after the latch of 74LS273 chip is Q0 and Q1, by circuit diagram it is found that working as
When Q0 is high level " 1 " and Q1 is low level " 0 ", relay is attracted, and when the control signal is other combinations, relay is located
In off-state, the possibility of remote control malfunction can be reduced in this way, improve remote control accuracy rate.
In summary: this is used for the terminal unit control device of power distribution automation, has developed using DSP as hardware core, makes
The measurement to network voltage, electric current is realized with sampling techniques, and it is effective that electric current, voltage are calculated according to alternating data acquisition
The electrical parameters such as value, active power and power factor, have given full play to the calculation processing power of DSP fast powerful, meet electricity conscientiously
The requirement of the real-time and complexity of Force system monitoring, has important practical significance to the development of power distribution automation.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.
Claims (4)
1. a kind of terminal unit control device for power distribution automation, including AC signal conditioning circuit (1), remote signalling input electricity
Road (2), remote control output circuit (3), direct current signal conditioning circuit (4) and dsp processor (5), it is characterised in that: the exchange letter
Number conditioning circuit (1) and the ADC input terminal phase in Current Transmit (11), voltage transformer pt (12) and dsp processor (5)
It connects, the output end of dsp processor (5) connects with remote control output circuit (3), the input terminal of dsp processor (5) and remote signalling input electricity
Road (2) connects, dsp processor (5) also with direct current signal conditioning circuit (4), keyboard LED (51), jtag interface (52), RS232/
485 interfaces (53), CAN driving interface (54), SPAM (55) and EPROM (56) connect, the Current Transmit (11) and electricity
The input terminal of mutual inductor PT (12) is pressed to connect with of ac input (6), the input terminal and direct current of direct current signal conditioning circuit (4)
Amount input (7) connects.
2. a kind of terminal unit control device for power distribution automation according to claim 1, it is characterised in that: described
The port the V1N1 series resistance R1 of HTP205B chip in AC signal conditioning circuit (1) connects on PT1+, HTP205B chip
The port V1N2 connect on PT1-, the port V01 and V02 the parallel resistance R2 and capacitor C1 of HTP205B chip connect adopt in AD respectively
On the positive and negative anodes of sample.
3. a kind of terminal unit control device for power distribution automation according to claim 1, it is characterised in that: described
The parallel diode D1 of port 1 and 2 of TLP521-4 optocoupler G1 in remote signalling input circuit (2), port 1 also meet current-limiting resistance R1,
Port 2 connects in bus, and 3 connecting resistance R2 of port, the capacitor C1 of TLP521-4 optocoupler G1 connects on the anode of amplifier LM339,
The port 4 of TLP521-4 optocoupler G1 meets the capacitor C1 other end, variable resistance R3 and capacitor C2 and connects on the cathode of amplifier LM339,
Output end series resistance R4, the variable resistance R3 other end and the resistance R2 other end of amplifier LM339, the end of LP521-4 optocoupler G3
1 and 2 parallel diode D2 of mouth, port 1 also meet current-limiting resistance R5, and port 2 connects in bus, the port 3 of TLP521-4 optocoupler G2
Connecting resistance R6, capacitor C3 connect on the anode of amplifier LM339, and the port 4 of TLP521-4 optocoupler G2 connects the capacitor C3 other end, can be changed
Resistance R7 and capacitor C4 connect on the cathode of amplifier LM339, and output end series resistance R8, the variable resistance R7 of amplifier LM339 is another
One end and the resistance R6 other end, resistance R6 and resistance R2 series connection.
4. a kind of terminal unit control device for power distribution automation according to claim 1, it is characterised in that: described
It is remotely controlled in output circuit (3) on the end the I/O Jie trigger of dsp processor (5), the pin Q0 and Q1 of trigger are connect respectively in light
On one end of coupling, the other end series diode D3 of optocoupler is connect on relay.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2019201295357 | 2019-01-24 | ||
| CN201920129535 | 2019-01-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209462083U true CN209462083U (en) | 2019-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920327326.3U Expired - Fee Related CN209462083U (en) | 2019-01-24 | 2019-03-14 | A kind of terminal unit control device for power distribution automation |
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| Country | Link |
|---|---|
| CN (1) | CN209462083U (en) |
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2019
- 2019-03-14 CN CN201920327326.3U patent/CN209462083U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191001 Termination date: 20200314 |