CN208316402U - The PLC control system of freeway surveillance and control equipment double circuit power supply - Google Patents
The PLC control system of freeway surveillance and control equipment double circuit power supply Download PDFInfo
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- CN208316402U CN208316402U CN201820835294.3U CN201820835294U CN208316402U CN 208316402 U CN208316402 U CN 208316402U CN 201820835294 U CN201820835294 U CN 201820835294U CN 208316402 U CN208316402 U CN 208316402U
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- 238000000819 phase cycle Methods 0.000 claims abstract description 23
- 230000001681 protective effect Effects 0.000 claims abstract description 19
- 238000012806 monitoring device Methods 0.000 claims abstract description 11
- 230000005611 electricity Effects 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 abstract description 15
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 230000007257 malfunction Effects 0.000 description 7
- 101100520231 Caenorhabditis elegans plc-3 gene Proteins 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 101100190618 Arabidopsis thaliana PLC3 gene Proteins 0.000 description 4
- 241001347978 Major minor Species 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000001012 protector Effects 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 208000016254 weariness Diseases 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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Abstract
The PLC control system of freeway surveillance and control equipment double circuit power supply, belongs to highway monitoring system technical field.Including programmable controller PLC; programmable controller PLC input terminal connects disconnected phase and phase sequence protective relay XJ, change-over switch SA; programmable controller PLC control terminal connects intermediate relay ZJ, A.C. contactor KM2; intermediate relay ZJ and A.C. contactor KM1 control cooperate; A.C. contactor KM1 and main power source control cooperate; A.C. contactor KM2 and auxiliary power control cooperate; main power source, auxiliary power connection monitoring device and other equipment; main power source is also cooperatively connected with disconnected phase and phase sequence protective relay XJ, and main power source, auxiliary power and change-over switch SA are cooperatively connected.The PLC control system of above-mentioned freeway surveillance and control equipment double circuit power supply, system wiring and maintenance are simple, reduce costs, and ensure that power supply reliability.
Description
Technical field
The utility model belongs to highway monitoring system technical field, and specially freeway surveillance and control equipment double loop supplies
The PLC control system of electricity.
Background technique
Vital, powering mode is played the role of in the power supply of administrative office's monitoring device in Expressway Operation management
Take double circuit power supply；As monitoring device power supply reliability problem is increasingly taken seriously, the case where for double circuit power supply,
Exploration is suitable for different types of double circuit power supply control model and has become a kind of trend.The double circuit power supply control originally used
Mode is to realize that electrical control is broken by XJ3-G type among the control of phase and phase sequence protective relay by traditional relay control
The start-stop of relay, the auxiliary contact of intermediate relay go the actuation and release of control A.C. contactor, to realize double loop
Switching and alarm.Itself the problem is that: system wiring and safeguard it is more complicated, increase maintenance investment；It cannot be guaranteed that should
The power supply reliability of road power supply.
The principle of double circuit power supply: double circuit power supply refers to what two electric substations or two power distribution cabinets of an electric substation came out
The two-lines road of same voltage.When the faulty power failure of a route, another route can switch at once to come into operation.Double back
Road refers generally to end, and another back-up circuit puts into operation after a line fault, powers for equipment.Two circuits can be same electricity
Source is also possible to different electrical power.Double circuit power supply is generally used for important load, and power supply is problematic all the way can use another way generation
It replaces, does not influence electric equipment operation, it should be noted that double circuit power supply, which has to formulation effective measures, prevents false switching, causes
Two road power supply short circuits, are likely to cause the accident at that rate.
Control relay there are the shortcomings that: today, relay had application to the every field of family and Industry Control.They
There is higher reliability than previous product.But this is also some problems of bring therewith.As the overwhelming majority controls relay
Device is carried out under the conditions of long term wear and weariness working, is easily damaged.And the contact of relay is easy to produce electric arc, very
It can be extremely melted together generation maloperation, cause serious consequence.Relay generates a large amount of heat and noise, while also consuming big
The electric energy of amount.And relay control system must be manual wiring, installation, if there is simply changing, it is also desirable to spend big
Amount time and man power and material go restructuring, installation and debugging.
Utility model content
For the above-mentioned problems in the prior art, the purpose of this utility model is that design provides a kind of highway
The technical solution of the PLC control system of monitoring device double circuit power supply, using the failover of PLC control double circuit power supply system
The disadvantage of original electric control system is solved with alarm, system wiring and maintenance are simple, reduce costs, and ensure that confession
Electric reliability.
The PLC control system of the freeway surveillance and control equipment double circuit power supply, it is characterised in that including programmable control
Device PLC processed, programmable controller PLC input terminal connect disconnected phase and phase sequence protective relay XJ, change-over switch SA, PLC technology
Device PLC control terminal connects intermediate relay ZJ, A.C. contactor KM2, and intermediate relay ZJ is matched with A.C. contactor KM1 control
It closes, A.C. contactor KM1 and main power source control cooperate, and A.C. contactor KM2 and auxiliary power control cooperate, main power source, auxiliary power
Monitoring device and other equipment are connected, main power source is also cooperatively connected with disconnected phase and phase sequence protective relay XJ, main power source, auxiliary power
It is cooperatively connected with change-over switch SA.
The PLC control system of the freeway surveillance and control equipment double circuit power supply, it is characterised in that further include and can compile
Loudspeaker, the mains power failure indicator light, auxiliary power malfunction indicator lamp of range controller PLC mating connection.
The PLC control system of the freeway surveillance and control equipment double circuit power supply, it is characterised in that on main power circuit
It is equipped with automatic air-break switch QF1.
The PLC control system of the freeway surveillance and control equipment double circuit power supply, it is characterised in that on auxiliary power circuit
It is equipped with automatic air-break switch QF2.
The PLC control system of above-mentioned freeway surveillance and control equipment double circuit power supply controls double circuit power supply system using PLC
Failover and alarm solve the disadvantage of original electric control system, system wiring and maintenance are simple, reduce costs,
And it ensure that power supply reliability.
Detailed description of the invention
Fig. 1 is the system block diagram of the utility model；
Fig. 2 is the utility model PLC control system ladder diagram；
Fig. 3 is the utility model PLC control system I/O wiring diagram；
Fig. 4 is the circuit diagram of the utility model；
In figure: 1- break phase and phase sequence protective relay XJ, 2- change-over switch SA, 3- programmable controller PLC, among 4- after
Electric appliance ZJ, 5- A.C. contactor KM2,6- A.C. contactor KM1,7- auxiliary power, 8- main power source, 9- monitoring device, 10- other set
Standby, 11- mains power failure indicator light, 12- loudspeaker, 13- auxiliary power malfunction indicator lamp.
Specific embodiment
Below in conjunction with Figure of description, the utility model is described in further detail.
As shown, the PLC control system of the freeway surveillance and control equipment double circuit power supply, including programmable controller
PLC3,3 input terminal of programmable controller PLC connect disconnected phase and phase sequence protective relay XJ1, change-over switch SA2, PLC technology
Device PLC3 control terminal connects intermediate relay ZJ 4, A.C. contactor KM2-5, intermediate relay ZJ 4 and A.C. contactor KM1-6
Control cooperation, A.C. contactor KM1-6 and the control of main power source 8 cooperate, and A.C. contactor KM2-5 and the control of auxiliary power 7 cooperate, main
Power supply 8, auxiliary power 7 connect monitoring device 9 and other equipment 10, and main power source 8 also cooperates with disconnected phase and phase sequence protective relay XJ1
Connection, main power source 8, auxiliary power 7 and change-over switch SA2 are cooperatively connected.It is preferred that further including cooperating to connect with programmable controller PLC 3
Loudspeaker 12, the mains power failure indicator light 11, auxiliary power malfunction indicator lamp 13 connect.It is preferred that being equipped on 8 circuit of main power source certainly
Air switch QF1 is moved, is equipped with automatic air-break switch QF2 on 7 circuit of auxiliary power.
The advantages of programmable controller PLC 3 that the utility model uses: in industrial automation, programmable controller
PLC3 becomes the Equipment Foundations of most of automated systems as automatic control, while also bringing preceding institute not to Industry Control
The outstanding variation having.Using the industrial control system of PLC compared with traditional industrial control system with relay, operation,
The various aspects such as control, efficiency and precision all have the advantages that incomparable.
The utility model double circuit power supply PLC control process is as follows:
1) assume a certain moment: main power source 8 is normal -- disconnected phase and phase sequence protective relay XJ1 actuation-intermediate relay
ZJ4 actuation-A.C. contactor KM1-6 actuation-monitoring device 9 is powered by main power source 8；
2) assume a certain moment: 8 failure of main power source -- disconnected phase and phase sequence protective relay XJ1 release-PLC technology
Device PLC3 control -- A.C. contactor KM1-6 release-A.C. contactor KM2-5 actuation-monitoring device 9 is supplied by auxiliary power 7
Electricity-loudspeaker 12 and mains power failure indicator light 11 are alarmed.
In the utility model: the selection of programmable controller PLC 3 and disconnected phase and phase sequence protective relay XJ1,
Monoblock type small PLC of the programmable controller PLC 3 using Mitsubishi Heavy Industries Ltd's production, model FXOS-10MR, it collects
The various functions module such as CPU, I/O, communication is integrated, and has the function of the features such as small in size, more, the ratio of performance to price is high；It is provided
Input point 6 and output point 4 are able to satisfy the I/O requirement of this project, and internal register storage region is allocated as follows: external input
Relay number is X0~X5, and 6 points of input point, external output relay is Y0~Y3, exportable 4 signals, timer number
For T0~T99, it is possible to provide 100 timers, counter number is C100~C143, it is possible to provide 44 timers.In view of can
The economic of programmable controller PLC3 uses, and main power source indicator light connects A.C. contactor KM1-6 normally opened contact, A.C. contactor
KM1-6 is attracted, and main power source indicator light is bright.
The disconnected disconnected phase and phase sequence protective relay of phase and phase sequence protective relay XJ1 selection XJ3-G type, working principle is such as
Under: when the phase sequence of three-phase is identical, the voltage after Resistor-Capacitor Unit is depressured is maximum, and it is dynamic that voltage signal driving executes testing agency
Make, relay is attracted, and contact is connected control relay and powered on.When phase sequence difference or disconnected phase, after Resistor-Capacitor Unit is depressured
Voltage is very low, and voltage signal, which is not enough to drive, executes testing agency's movement, so, relay is disconnected in reset state, contact
Release relay power supply is also just cut off.When use such as monitoring device can not start, and the phase sequence identification of possible protector has acted as
With need to only exchange any two line of protector input terminal normally to start, as long as changing any one phase power supply, protector later
It can play a protective role.
The utility model PLC control system I/O allocation table, is shown in Table 1.
1 double circuit power supply PLC control system I/O of table distribution
| Address | External signal | Remarks | Function |
| SA | Left position | Manually select main power source operation | |
| X0 | SA | Right position | Manually select auxiliary power or maintenance main power source operation |
| X1 | XJ3 | Normally opened contact | Disconnected phase and phase sequence protection |
| Y0 | ZJ coil | Alternating current 220V | Main power source operation control |
| Y1 | KM2 coil | Alternating current 220V | Auxiliary power operation control |
| Y2 | YD2 | Green | Mains power failure/maintenance alarm lamp |
| Y3 | Alternating current 220V | Mains power failure alarming horn |
The function of each element is in the utility model:
Automatic air-break switch QF1 and QF2 are main power source 8,7 control system master switch of auxiliary power, while having short circuit, mistake
The defencive functions such as pressure, overcurrent.A.C. contactor KM1-6, A.C. contactor KM2-5 have the function of o-volt protection.A.C. contactor
KM1-6 main contacts is used to for main power source 8 being connected to the input point of branch electronic box；A.C. contactor KM2-5 is for auxiliary power 7 to be connected to
The input point of branch electronic box；Intermediate relay ZJ 4 is the operation control relay of main power source 8, it is contemplated that control relay is ground for a long time
Damage and weariness working, are easily damaged；Control 8 operation contactor of main power source is gone using 4 normally-closed contact of intermediate relay ZJ；Work as centre
Relay ZJ4 normally-closed contact closure, connects its main contacts of A.C. contactor KM1-6 closure, and main power source 8 operates normally；Work as centre
Relay ZJ4 normally-closed contact disconnects its main contacts disjunction of A.C. contactor KM1-6 releasing winding, 8 failure of main power source.
The double circuit power supply PLC control system ladder diagram of the utility model is shown in Fig. 2, ladder diagram is inputted program, and download
To programmable controller PLC 3.
1) two rotary switch SA2 are threaded to " main power source operation " position, main electricity first by 8 normal operation section of main power source to the left
The phase and phase sequence protective relay XJ1 normally opened contact that breaks when source 8 is normal is closed, the normally closed disconnection of input relay X0, rotary switch SA2
It disconnects, input relay X1 is disconnected；Output relay Y0 is disconnected, and intermediate relay ZJ 4 is in release conditions, and control power supply passes through
The normally closed connection A.C. contactor KM1-6 coil of intermediate relay ZJ 4, A.C. contactor KM1-6 main contact closure, main power source 8 is just
Often operation.
2) 8 failure of main power source, 7 target phase of auxiliary power, when 8 operating system element fault of main power source 8 or main power source, phase of breaking
It is discharged with phase sequence protective relay XJ1 normally opened contact, the normally closed closure of input relay X0；Output relay Y0 movement closure, in
Between relay ZJ4 coil be closed, 4 normally closed interlock of intermediate relay ZJ disconnects, and A.C. contactor KM1-6 releasing winding, exchange connects
Tentaculum KM1-6 main contacts disconnects the input point of main power source 8 and branch electronic box；Y0 normally-closed contact closure simultaneously, T0 are attracted delay,
TO normal opened contact is closed after 5 seconds, output relay Y1 movement closure, A.C. contactor KM2-5 closure, A.C. contactor KM2-5
The input point of auxiliary power 7 and branch electronic box is closed by main contacts, and auxiliary power 7 enters operating status.Y1 normal opened contact when Y1 is attracted
Closure, T1 is normally opened by Y1 and T2 normally closed contact is attracted, and be delayed disjunction in 0.5 second；Output relay Y2 passes through Y1 normal opened contact, T2
Normally closed contact, T1 normally closed contact are connected, and malfunction indicator lamp is bright；T1 is attracted T1 normal opened contact closure T2 and is attracted, and 0.5 second point of delay
Disconnected, 11 malfunction indicator lamp of mains power failure indicator light is gone out, and it is 1 that such T1 and T2 cooperation, which generate the period as an impulse generator,
The square-wave pulse of second (0.5 second logical, to break 0.5 second), makees flashing light alarm use for malfunction indicator lamp.Y0 is attracted Y0 normal opened contact and connects
Logical, input relay X1 normally closed contact is in closed state, and output relay Y3 movement closure, loudspeaker 12, which power on, to be started to report
It is alert.
3) main power source 8,7 target phase of auxiliary power are overhauled, when 8 failure of main power source need to overhaul auxiliary power operation, maintenance personal
Two rotary switch SA2 are threaded to the right " auxiliary power operation " position, at this time 7 normal operation of auxiliary power, but input relay X1
Normally closed contact disconnects, output relay Y3 release, loudspeaker stop alarm；This measure be in order to guarantee maintenance personal have one quietly
Repair and maintaining.When the equal maintenance of main power sources 8, which finishes, can be used, phase and phase sequence protective relay XJ1 normally opened contact closure of breaking, input
The normally closed disconnection of relay X0, output relay Y0, Y1 release, intermediate relay ZJ 4, A.C. contactor KM2-5 release, exchange connect
Tentaculum KM2-5 main contacts disconnects the input point of auxiliary power 7 and branch electronic box；A.C. contactor KM1-6 main contact closure, main electricity
Source 8 operates normally.Major-minor power supply is in switching, due to the rapidity and contactor of the movement of 3 internal element of programmable controller PLC
The lag of movement, is likely to result in phase fault, arranges so taking interlocking using the normally-closed contact of contactor in output loop
It applies.Maintenance personal finishes in maintenance simultaneously must be threaded to the left two rotary switch SA2 " main power source operation " position, otherwise next
Mains power failure loudspeaker 12 not will call the police.
4) auxiliary power 7,8 target phase of main power source are overhauled, because programmable controller PLC 3 controls power supply and comes from auxiliary power 7,
So major-minor power supply handoff functionality loses at this time；Disconnected phase and phase sequence defencive function does not have yet, but in view of maintenance time will not be too
Long, problem should be little；And A.C. contactor KM1-6 by intermediate relay ZJ 4 normally closed and A.C. contactor KM2-5 it is normal
Closed contact control is not in malfunction.
Using with maintenance notice: 1) when major-minor power supply is normal, main power source indicator light is bright, and mains power failure indicator light 11 is not
It is bright；Two rotary switch SA2 are located at left " main power source operation " position, if main power source indicator light does not work, it may be possible to main power source instruction
Lamp control system failure；2) 8 failure of main power source, auxiliary power 7 are run, and main power source indicator light does not work, mains power failure indicator light 11
Flashing alarm；Loudspeaker 12 are alarmed simultaneously, remind use and maintenance personnel；3) main power source 8 is overhauled, auxiliary power 7, mains power failure are used
Indicator light 11 flashes, and loudspeaker 12 can not alarm；4) maintenance auxiliary power 7 does not influence the use of main power source 8.
Claims (4)
1. the PLC control system of freeway surveillance and control equipment double circuit power supply, it is characterised in that including programmable controller PLC
(3), programmable controller PLC (3) input terminal connects disconnected phase and phase sequence protective relay XJ(1), change-over switch SA(2), can compile
Range controller PLC(3) control terminal connection intermediate relay ZJ (4), A.C. contactor KM2(5), intermediate relay ZJ (4) and friendship
Flow contactor KM1(6) control cooperation, A.C. contactor KM1(6) cooperate with main power source (8) control, A.C. contactor KM2(5) with
Auxiliary power (7) control cooperation, main power source (8), auxiliary power (7) connection monitoring device (9) and other equipment (10), main power source (8)
Also it is cooperatively connected with disconnected phase and phase sequence protective relay XJ(1), main power source (8), auxiliary power (7) and change-over switch SA(2) cooperation
Connection.
2. the PLC control system of freeway surveillance and control equipment double circuit power supply as described in claim 1, it is characterised in that also wrap
Include the loudspeaker (12) being cooperatively connected with programmable controller PLC (3), mains power failure indicator light (11), auxiliary power indicating fault
Lamp (13).
3. the PLC control system of freeway surveillance and control equipment double circuit power supply as described in claim 1, it is characterised in that main electricity
Automatic air-break switch QF1 is equipped on source (8) circuit.
4. the PLC control system of freeway surveillance and control equipment double circuit power supply as described in claim 1, it is characterised in that secondary electricity
Automatic air-break switch QF2 is equipped on source (7) circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820835294.3U CN208316402U (en) | 2018-05-31 | 2018-05-31 | The PLC control system of freeway surveillance and control equipment double circuit power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820835294.3U CN208316402U (en) | 2018-05-31 | 2018-05-31 | The PLC control system of freeway surveillance and control equipment double circuit power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208316402U true CN208316402U (en) | 2019-01-01 |
Family
ID=64709260
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820835294.3U Expired - Fee Related CN208316402U (en) | 2018-05-31 | 2018-05-31 | The PLC control system of freeway surveillance and control equipment double circuit power supply |
Country Status (1)
| Country | Link |
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| CN (1) | CN208316402U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110001678A (en) * | 2019-03-26 | 2019-07-12 | 中车青岛四方机车车辆股份有限公司 | Compartment power supply burn out detection and protection control circuit |
| CN115685856A (en) * | 2022-11-10 | 2023-02-03 | 广州一平信息科技有限公司 | PLC communication system with line detection and alarm functions |
-
2018
- 2018-05-31 CN CN201820835294.3U patent/CN208316402U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110001678A (en) * | 2019-03-26 | 2019-07-12 | 中车青岛四方机车车辆股份有限公司 | Compartment power supply burn out detection and protection control circuit |
| CN110001678B (en) * | 2019-03-26 | 2020-06-02 | 中车青岛四方机车车辆股份有限公司 | Train carriage power supply broken line detection and protection control circuit |
| CN115685856A (en) * | 2022-11-10 | 2023-02-03 | 广州一平信息科技有限公司 | PLC communication system with line detection and alarm functions |
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Granted publication date: 20190101 |