CN102355048B - Intelligent dual-power automatic transfer switch and running method - Google Patents
Intelligent dual-power automatic transfer switch and running method Download PDFInfo
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- CN102355048B CN102355048B CN2011102769448A CN201110276944A CN102355048B CN 102355048 B CN102355048 B CN 102355048B CN 2011102769448 A CN2011102769448 A CN 2011102769448A CN 201110276944 A CN201110276944 A CN 201110276944A CN 102355048 B CN102355048 B CN 102355048B
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Abstract
The invention discloses an intelligent dual-power automatic transfer switch, which relates to a loop device with an automatic conversion function for disconnecting a distribution system from a normal power supply and connecting the distribution system with a standby power supply. The switch comprises a control part and an execution part. The control part mainly comprises a singlechip, a voltage transformer, a booster circuit, a photoelectric coupler, a key, a liquid crystal display (LCD) and a chip 74LS164. The execution part mainly comprises a motor, a mechanical interlocking structure and a circuit breaker. In the switch, the control part is formed by taking the singlechip as a core, variations of corresponding voltage and frequency parameters of two paths of input power can be automatically detected, logic judgments are made, and when a power supply system has abnormal voltage or frequency, the motor rotates and the mechanical interlocking structure drives the circuit breaker to act to realize the automatic transfer of the power supplies, thereby overcoming the shortcoming that a load circuit cannot be automatically transferred from an abnormal power supply to another normal power supply when the power supply system has the abnormal voltage or frequency in the prior art.
Description
Technical field
Technical scheme of the present invention relate to for distribution system from normal power source disconnect and link stand-by power supply with the automatically loop apparatus of conversion, specifically Intelligent dual-power automatic transfer switch and operation method thereof.
Background technology
Along with the develop rapidly of Chinese national economy, all trades and professions are more and more higher to the requirement of the power supply quality of electric power system and power supply reliability, require to realize continued power,, even when breaking down, also can restore electricity as far as possible at short notice.Automatic changeover switch electric appliance has just arisen at the historic moment, it is grouped into by one or several diverter switch electrical equipment and switch control portion, can the direct-detection two-way relevant parameters such as the voltage of access power supply and frequency variation and carry out the logic judgement, thereby realize the automatic switchover of power supply, namely when electric power system goes wrong, load circuit is automatically switched to another normal power supply from a problem power supply, to guarantee important load continuously and operation reliably.
CN201708542U, CN201601532U, CN101567580, CN201213098 and CN201623530U have disclosed the mechanical structure of the integral body of double power supply automatic switching switch, CN1632896 discloses the transmission mechanism of double power supply automatic switching switch, the technology of above-mentioned published double power supply automatic switching switch is all the content of machinery, all there is the variation of the voltage that can not directly automatically detect two-way access power supply and frequency relevant parameter in these technology and carries out the logic judgement, when voltage or frequency anomaly problem appear in electric power system, load circuit can not be automatically switched to the shortcoming of another normal power supply from a problem power supply.
Summary of the invention
technical problem to be solved by this invention is: Intelligent dual-power automatic transfer switch and operation method thereof are provided, form control section take single-chip microcomputer as core, can directly automatically detect the variation of the voltage of two-way access power supply and frequency relevant parameter and carry out the logic judgement, when electric power system goes wrong, while voltage or frequency anomaly namely occurring, electric machine rotation, drive the circuit breaker action via mechanical locking structure, to realize the automatic switchover of power supply, thereby overcome the double power supply automatic switching switch of prior art when voltage or frequency anomaly problem appear in electric power system, load circuit can not be automatically switched to the shortcoming of another normal power supply from a problem power supply.
The present invention solves this technical problem the technical scheme that adopts:
Intelligent dual-power automatic transfer switch, comprise control section and operating part, wherein, control section mainly consists of single-chip microcomputer, voltage transformer, voltage lifting circuit, photoelectrical coupler, button, LCD display and chip 74LS164, and operating part mainly consists of motor, mechanical locking structure and circuit breaker, the connected mode of above-mentioned parts is, be connected with photoelectrical coupler with voltage lifting circuit respectively by single-chip microcomputer, voltage lifting circuit is connected with voltage transformer respectively and forms thus voltage and frequency collection circuit again with photoelectrical coupler in addition, be connected to form successively motor-drive circuit by single-chip microcomputer by triode and relay and motor and circuit breaker, be connected to form successively the power supply status indicating circuit by single-chip microcomputer and chip 74LS164 with the light-emitting diode that is arranged in LCD display, be connected to form human-computer interaction module by single-chip microcomputer and LCD display and button, motor drives the circuit breaker action via mechanical locking structure.
Above-mentioned Intelligent dual-power automatic transfer switch, described circuit breaker is the circuit breaker with release of overcurrent, belongs to CB level automatic transfer switch.
Above-mentioned Intelligent dual-power automatic transfer switch, described LCD display model is OCMJ48C-3, is a kind of liquid crystal display with character library.
Does above-mentioned Intelligent dual-power automatic transfer switch, have function software in described single-chip microcomputer, and its overall procedure is: beginning → initialization → fire-fighting reset? → Y, fire-fighting reset routine → return to fire-fighting to reset? N, does the circuit breaker auxiliary signal detect → threads off? → Y, dropout handling procedure → return to fire-fighting to reset? N, push button signalling detection preservation → automatically? → Y, automated session → return to fire-fighting to reset? N, manual process → return to fire-fighting to reset?
After software brings into operation, first carry out initialization, completion system resets, then judge whether to receive the fire-fighting reset signal?, if receive, enter the fire-fighting reset routine, and return to fire-fighting and reset? If do not receive, enter circuit breaker additional alarm input, then judge whether to thread off? if thread off, enter the dropout handling procedure, restart the judgement of fire-fighting reset signal; If thread off, enter push button signalling and detect preservation, then judge whether to be set as automatically?, if automatically, enter automated session, and then return to fire-fighting and reset? , if not automatically, enter manual process, and then return to fire-fighting and reset?
Above-mentioned Intelligent dual-power automatic transfer switch, provide needed electric power with external power supply for wherein single-chip microcomputer and other circuit supplies.
Above-mentioned Intelligent dual-power automatic transfer switch, related parts are all that those skilled in the art know and can be commercially available, and related components and parts and the method for attachment of circuit are that those skilled in the art are known.
the operation method of above-mentioned Intelligent dual-power automatic transfer switch, it realizes that the process that power supply automatically switches is: the two-way power supply voltage signal that voltage transformer will detect is input in single-chip microcomputer through voltage lifting circuit, voltage signal through voltage transformer output also is input in single-chip microcomputer through photoelectrical coupler, the voltage signal that single-chip microcomputer will be inputted is handled as follows: single-chip microcomputer utilizes its A/D modular converter to adopt constant duration to gather analog voltage signal, carry out A/D and be converted to the discrete sampling value of some sequences, then apply root mean square algorithm and obtain to be equivalent to the effective value of input voltage signal from the sampled value of these sequences.The voltage signal of the two-way power supply that voltage transformer will detect also is input in single-chip microcomputer through photoelectrical coupler simultaneously, single-chip microcomputer is sampled to the voltage signal of the two-way power supply by the photoelectrical coupler input, by timing and calculating, single-chip microcomputer obtains effective value and the frequency values of two-way supply voltage, and the effective value of this two-way supply voltage and frequency values information are presented on LCD display in real time.The user sets or presets effective value and the frequency values that needs the supply voltage that uses immediately by the button on control section.Whether single-chip microcomputer has button immediately to press Real-Time Monitoring,, if having, according to the key command of immediately pressing, carries out setting parameter; If do not have button immediately to press, single-chip microcomputer is effective value and the frequency values of cycle detection voltage signal.Single-chip microcomputer needs effective value and the frequency values of the supply voltage that uses to compare with above-mentioned presetting the effective value of the supply voltage of current time and frequency values, if the effective value of the supply voltage of current time or frequency values have exceeded the scope of set point, be that voltage occurs abnormal, single-chip microcomputer sends the electrical source exchange order, make electric machine rotation, drive circuit breaker disengagement failure power supply via mechanical locking structure, and be switched to another road normal power source, make and realize continued power.
The operation method of above-mentioned Intelligent dual-power automatic transfer switch, it realizes that the power supply automatic switchover has following manual work pattern and two kinds of patterns of automatic operation mode:
Manual work pattern is: by by key control operating part action, with above-mentioned power supply at power supply commonly used, stand-by power supply with detained again in two minutes between three states and switch;
Automatic operation mode is: the control section of Intelligent dual-power automatic transfer switch is monitored power supply commonly used and stand-by power supply at any time, there are any phase or heterogeneous voltage and frequency abnormal conditions to occur in power supply three-phase commonly used, dead electricity even, i.e. disconnected phase time, through suitable time delay t
1, determine that power supply trouble is irreversible, when power supply commonly used can't provide normal power supply, be about to power supply commonly used and disconnect, then pass through t
2After time delays, stand-by power supply is closed, and this moment, the three-phase voltage of stand-by power supply was normal; After at stand-by power supply, moving a period of time, when power supply commonly used recovered again normal, control section was through t
3Delay confirmation power up commonly used is normal, then stand-by power supply cut off, then through t
4Time delay will be commonly used the power supply closure, and this operating process is for hauling oneself willingly into runback; When after stand-by power supply power supply certain hour, power supply commonly used recovers again normally, and no longer be switched to power supply commonly used from stand-by power supply this moment, only switches when the stand-by power supply fault, and this operating process is for hauling oneself willingly into not runback.
The operation method of above-mentioned Intelligent dual-power automatic transfer switch, it realizes that the program that power supply automatically switches is:
The first step, after powering on, general register and special register are carried out initialization, initialization comprising the register of timer and A/D conversion, and the initialization of light-emitting diode display, sample frequency is set, and sample frequency, much larger than the frequency of two-way power supply voltage signal, turns second step after initialization is completed;
Whether second step, have dropout by circuit breaker additional alarm input, if occur threading off, alarm,, if without dropout, turned for the 3rd step;
The 3rd step, adopt the peak value detection method to carry out phase sequence to the two-way supply voltage and detect, if the power phase mistake, alarm,, if power phase is normal, turned for the 4th step;
In the 4th step, gather the two-way power supply voltage signal according to sample frequency, after completing the sampling of one-period, and the effective value of calculating voltage signal and frequency, and the effective value of voltage signal and frequency are presented on liquid crystal display screen, turned for the 5th step;
In the 5th step, judge the effective value of voltage signal and frequency whether within the permissible variation scope, when voltage effective value or frequency have exceeded the permissible variation scope, send the electrical source exchange order, make electric machine rotation, drive circuit breaker disengagement failure power supply, realize electrical source exchange.
Beneficial effect of the present invention, compared with prior art advantage of the present invention is as follows:
(1) Intelligent dual-power automatic transfer switch of the present invention and operation method thereof, both detected the amplitude of supply voltage, also measured the frequency of supply voltage, and be abnormal if supply frequency occurs, also can realize automatically switching.
(2) Intelligent dual-power automatic transfer switch of the present invention is take single-chip microcomputer as core, LCD is with Chinese display backlight, the touch key operation, can be to controlling parameter by the button user on control section: overvoltage, under voltage value, exemplary frequency deviation values and handoff delay be set, can see the setting result from liquid crystal display screen, facilitate the monitoring of people to each phase power supply situation.
(3) Intelligent dual-power automatic transfer switch of the present invention and operation method handoff delay thereof can be set: during abnormity of power supply commonly used, power supply is time delay t1 by two minutes Zi electrical source exchange commonly used; , from two minutes states, be switched to the time delay t2 of stand-by power supply; During abnormal the or runback of stand-by power supply, be switched to the time delay t3 of two minutes states; , from two minutes states, be switched to the time delay t4 of power supply commonly used.
(4) Intelligent dual-power automatic transfer switch of the present invention and operation method thereof are cut and are had the three-phase phase-sequence automatic identification function.
in a word, Intelligent dual-power automatic transfer switch of the present invention and operation method thereof are cut and are formed control section take single-chip microcomputer as core, can directly automatically detect the variation of the voltage of two-way access power supply and frequency relevant parameter and carry out the logic judgement, when electric power system goes wrong, while voltage or frequency anomaly namely occurring, electric machine rotation, drive the circuit breaker action via mechanical locking structure, to realize the automatic switchover of power supply, thereby overcome the double power supply automatic switching switch of prior art when voltage or frequency anomaly problem appear in electric power system, load circuit can not be automatically switched to the shortcoming of another normal power supply from a problem power supply.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is Intelligent dual-power automatic transfer switch composition frame chart of the present invention.
Fig. 2 is Intelligent dual-power automatic transfer switch constituted mode schematic diagram of the present invention.
Fig. 3 is Intelligent dual-power automatic transfer switch profile diagrammatic side view of the present invention.
Fig. 4 is that voltage and the frequency collection circuit of Intelligent dual-power automatic transfer switch of the present invention forms and catenation principle figure.
Fig. 5 is that motor-drive circuit and the power supply status indicating circuit of Intelligent dual-power automatic transfer switch of the present invention forms and catenation principle figure.
Fig. 6 is the function software overview flow chart of Intelligent dual-power automatic transfer switch of the present invention.
Fig. 7 is the flow chart that Intelligent dual-power automatic transfer switch of the present invention is realized the power supply automatic switching program.
In figure, 1. single-chip microcomputer, 2. voltage lifting circuit, 3. voltage transformer, 4. photoelectrical coupler, 5. chip 74LS164,6. light-emitting diode, 7. button, 8.LCD display, 9. triode, 10. relay, 11. motors, 12. mechanical locking structure, 13. circuit breakers, 14. liquid crystal display screens, 15. shell, 16. external power supply sockets, 17. two-way outlets, D1. voltage and frequency collection circuit, D2. motor-drive circuit, D3. power supply status indicating circuit.
Embodiment
Embodiment illustrated in fig. 1 showing, Intelligent dual-power automatic transfer switch of the present invention comprises control section and operating part, wherein, control section is to consist of single-chip microcomputer 1, voltage transformer 3, voltage lifting circuit 2, photoelectrical coupler 4, button 7, LCD display 8 and chip 74LS1645, and operating part is to consist of motor 11, mechanical locking structure 12 and circuit breaker 13.
embodiment illustrated in fig. 2 showing, the constituted mode of Intelligent dual-power automatic transfer switch of the present invention is, be connected with photoelectrical coupler 4 with voltage lifting circuit 2 respectively by single-chip microcomputer 1, voltage lifting circuit 2 is connected with voltage transformer 3 respectively and forms thus voltage and frequency collection circuit D1 again with photoelectrical coupler 4 in addition, successively be connected to form motor-drive circuit D2 by triode 9 and relay 10 with motor 11 and circuit breaker 13 by single-chip microcomputer 1, successively be connected to form power supply status indicating circuit D3 with chip 74LS1645 with the light-emitting diode 6 that is arranged in LCD display 8 by single-chip microcomputer 1.Wherein by single-chip microcomputer 1 and LCD display 8 and button 7, be connected to form human-computer interaction module, motor 11 drives circuit breaker 13 actions via mechanical locking structure 12.
Embodiment illustrated in fig. 3 showing, the profile of Intelligent dual-power automatic transfer switch of the present invention is cuboid, is provided with button 7, liquid crystal display screen 14, external power supply socket 16 and two-way outlet 17 on shell 15.
Embodiment illustrated in fig. 4 showing, the voltage of Intelligent dual-power automatic transfer switch of the present invention and frequency collection circuit D1 comprise single-chip microcomputer 1, voltage transformer 3, photoelectrical coupler 4, voltage lifting circuit 2 and power supply.they realize that the operation method of voltage and frequency collection effect is: power supply A phase voltage commonly used is by voltage transformer 3 decompression transformations, carry out voltage sample by sampling resistor R13 again, the A phase voltage signal of introducing is input in single-chip microcomputer 1 through voltage lifting circuit 2, the A phase voltage signal is input in single-chip microcomputer 1 after photoelectrical coupler 4 after voltage transformer 3 outputs simultaneously, the voltage signal that single-chip microcomputer 1 will be inputted is handled as follows: single-chip microcomputer 1 utilizes its A/D modular converter to adopt constant duration to gather analog voltage signal, carry out A/D and be converted to the discrete sampling value of some sequences, then apply root mean square algorithm and obtain to be equivalent to the effective value of input voltage signal from the sampled value of these sequences, 1 pair of voltage signal of single-chip microcomputer is sampled, and by timing and calculating, single-chip microcomputer 1 can obtain the frequency values of supply voltage.Acquisition method for each phase voltage of the B phase of power supply commonly used and C phase voltage, stand-by power supply and frequency is same as above.
Embodiment illustrated in fig. 5 showing, formation and the connected mode of the motor-drive circuit D2 of Intelligent dual-power automatic transfer switch of the present invention and power supply status indicating circuit D3 are that wherein motor-drive circuit D2 comprises single-chip microcomputer 1, relay 10, triode 9 and motor 11.They realize that the operation method of motor driving effect is: abnormal if voltage occurs, suppose abnormity of power supply commonly used, and single-chip microcomputer 1RD5 port sends high level, makes triode 9T3 conducting, and then makes relay 10 adhesives, and being switched to stand-by power supply is motor 11 power supplies; Send high level by single-chip microcomputer 1RD6 port again, make triode 9T2 conducting, and then make relay 10 adhesives, motor 11 forward control loop conductings, motor 11 rotates, drive circuit breaker 13 disengagement failure power supplys via mechanical locking structure 12, and be switched to another road normal power source, make and realize continued power.Power supply status indicating circuit D3 partly comprises single-chip microcomputer 1, chip 74LS1645 and light-emitting diode 6.They realize that the operation method of power supply status indicative function is: single-chip microcomputer 1 is latched into the power information data in chip 74LS1645, when needs are exported these information, chip 74LS1645 adopts the mode of parallel output to light light-emitting diode display 8, thereby realized the demonstration of single-chip microcomputer 1 output information, these information comprise current two-way power supply status and power supply switching signal commonly used, trip signal state and stand-by power supply switching signal, trip signal state.
Embodiment illustrated in fig. 6 showing, the function software overall procedure that deposits single-chip microcomputer 1 in Intelligent dual-power automatic transfer switch of the present invention in is: does beginning → initialization → fire-fighting reset? → Y, fire-fighting reset routine → return to fire-fighting to reset? N, does the circuit breaker auxiliary signal detect → threads off? → Y, dropout handling procedure → return to fire-fighting to reset? N, push button signalling detection preservation → automatically? → Y, automated session → return to fire-fighting to reset? N, manual process → return to fire-fighting to reset?
Embodiment illustrated in fig. 7 showing, does Intelligent dual-power automatic transfer switch of the present invention realize that the flow process of power supply automatic switching program is: beginning → initialization → dropout? → be to thread off and process → return initialization; No, is phase sequence detection → phase sequence normal? → no, report to the police and show failure cause → return initialization; That voltage detecting and demonstration → voltage are normal? → be to return to initialization; No, need conversion? → no, return to initialization; Be drive motors → return initialization.
Form Intelligent dual-power automatic transfer switch according to Fig. 2,3,4 and 5 shown devices, the function software that deposits single-chip microcomputer 1 in has function software overall procedure shown in Figure 6.Wherein, circuit breaker 13 used is the circuit breakers with release of overcurrent, belongs to CB level automatic transfer switch; The model of LCD display 8 used is OCMJ48C-3, is a kind of liquid crystal display with character library.This Intelligent dual-power automatic transfer switch, provide needed electric power with external power supply for wherein single-chip microcomputer 1 and other circuit supplies.
the working procedure of the Intelligent dual-power automatic transfer switch of the present embodiment is, the two-way power supply voltage signal that voltage transformer 3 will detect is input in single-chip microcomputer 1 through voltage lifting circuit 2, voltage signal through voltage transformer 3 outputs also is input in single-chip microcomputer 1 through photoelectrical coupler 4, the voltage signal that single-chip microcomputer 1 will be inputted is handled as follows: single-chip microcomputer 1 utilizes its A/D modular converter to adopt constant duration to gather analog voltage signal, carry out A/D and be converted to the discrete sampling value of some sequences, then apply root mean square algorithm and obtain to be equivalent to the effective value of input voltage signal from the sampled value of these sequences.The voltage signal of the two-way power supply that voltage transformer 3 will detect also is input in single-chip microcomputer 1 through photoelectrical coupler 4 simultaneously, 1 pair of voltage signal by the two-way power supply of photoelectrical coupler 4 inputs of single-chip microcomputer is sampled, by timing and calculating, single-chip microcomputer 1 obtains magnitude of voltage and the frequency values of two-way power supply, and the effective value of this two-way supply voltage and frequency values information are presented on LCD display 8 in real time.The user sets or presets effective value and the frequency values that needs the supply voltage that uses immediately by the button 7 on control section.Whether single-chip microcomputer 1 has button 7 immediately to press Real-Time Monitoring,, if having, according to the key command of immediately pressing, carries out setting parameter; If do not have button 7 immediately to press, effective value and the frequency values of 1 cycle detection voltage signal of single-chip microcomputer.Single-chip microcomputer 1 needs effective value and the frequency values of the supply voltage that uses to compare with above-mentioned presetting the effective value of the supply voltage of current time and frequency values, if the effective value of the supply voltage of current time or frequency values have exceeded the scope of set point, be that voltage occurs abnormal, single-chip microcomputer 1 sends the electrical source exchange order, motor 11 is rotated, drive circuit breaker 13 disengagement failure power supplys via mechanical locking structure 12, and be switched to another road normal power source, make and realize continued power.
The operation method of the Intelligent dual-power automatic transfer switch of the present embodiment, it realizes that the power supply automatic switchover has following manual work pattern and two kinds of patterns of automatic operation mode:
Manual work pattern is: control the operating parts action by button 7, with above-mentioned power supply at power supply commonly used, stand-by power supply with detained again in two minutes between three states and switch;
Automatic operation mode is: the control section of Intelligent dual-power automatic transfer switch is monitored power supply commonly used and stand-by power supply at any time, there are any phase or heterogeneous voltage and frequency abnormal conditions to occur in power supply three-phase commonly used, dead electricity even, i.e. disconnected phase time, through suitable time delay t
1, determine that power supply trouble is irreversible, when power supply commonly used can't provide normal power supply, be about to power supply commonly used and disconnect, then pass through t
2After time delays, stand-by power supply is closed, and this moment, the three-phase voltage of stand-by power supply was normal; After at stand-by power supply, moving a period of time, when power supply commonly used recovered again normal, control section was through t
3Delay confirmation power up commonly used is normal, then stand-by power supply cut off, then through t
4Time delay will be commonly used the power supply closure, and this operating process is for hauling oneself willingly into runback; When after stand-by power supply power supply certain hour, power supply commonly used recovers again normally, and no longer be switched to power supply commonly used from stand-by power supply this moment, only switches when the stand-by power supply fault, and this operating process is for hauling oneself willingly into not runback.
The operation method of the Intelligent dual-power automatic transfer switch of the present embodiment, it realizes that the program that power supply automatically switches is:
The first step, after powering on, general register and special register are carried out initialization, initialization comprising the register of timer and A/D conversion, and the initialization of light-emitting diode display 8, sample frequency is set, and sample frequency, much larger than the frequency of two-way power supply voltage signal, turns second step after initialization is completed;
Whether second step, have dropout by circuit breaker additional alarm input, if occur threading off, alarm,, if without dropout, turned for the 3rd step;
The 3rd step, adopt the peak value detection method to carry out phase sequence to the two-way supply voltage and detect, if the power phase mistake, alarm,, if power phase is normal, turned for the 4th step;
In the 4th step, gather the two-way power supply voltage signal according to sample frequency, after completing the sampling of one-period, and the effective value of calculating voltage signal and frequency, and the effective value of voltage signal and frequency are presented on liquid crystal display screen 14, turned for the 5th step;
In the 5th step, judge the effective value of voltage signal and frequency whether within the permissible variation scope, when voltage effective value or frequency have exceeded the permissible variation scope, send the electrical source exchange order, motor 11 is rotated, drive circuit breaker 13 disengagement failure power supplys, realize electrical source exchange.
Claims (2)
1. Intelligent dual-power automatic transfer switch, it is characterized in that: comprise control section and operating part, wherein, control section mainly consists of single-chip microcomputer, voltage transformer, voltage lifting circuit, photoelectrical coupler, button, LCD display and chip 74LS164, and operating part mainly consists of motor, mechanical locking structure and circuit breaker, the connected mode of above-mentioned parts is, be connected with photoelectrical coupler with voltage lifting circuit respectively by single-chip microcomputer, voltage lifting circuit is connected with voltage transformer respectively and forms thus voltage and frequency collection circuit again with photoelectrical coupler in addition, be connected to form successively motor-drive circuit by single-chip microcomputer by triode and relay and motor and circuit breaker, be connected to form successively the power supply status indicating circuit by single-chip microcomputer and chip 74LS164 with the light-emitting diode that is arranged in LCD display, be connected to form human-computer interaction module by single-chip microcomputer and LCD display and button, motor drives the circuit breaker action via mechanical locking structure, there is function software in described single-chip microcomputer, does its overall procedure is: beginning → initialization → fire-fighting reset? → Y, fire-fighting reset routine → return to fire-fighting to reset? N, does the circuit breaker auxiliary signal detect → threads off? → Y, dropout handling procedure → return to fire-fighting to reset? N, push button signalling detection preservation → automatically? → Y, automated session → return to fire-fighting to reset? N, manual process → return to fire-fighting to reset?
After software brings into operation, first carry out initialization, completion system resets, then judge whether to receive the fire-fighting reset signal?, if receive, enter the fire-fighting reset routine, and return to fire-fighting and reset? If do not receive, enter circuit breaker additional alarm input, then judge whether to thread off? if thread off, enter the dropout handling procedure, restart the judgement of fire-fighting reset signal; If thread off, enter push button signalling and detect preservation, then judge whether to be set as automatically?, if automatically, enter automated session, and then return to fire-fighting and reset? , if not automatically, enter manual process, and then return to fire-fighting and reset?
2. the operation method of the said Intelligent dual-power automatic transfer switch of claim 1 is characterized in that:
Realize that the process that power supply automatically switches is: the two-way power supply voltage signal that voltage transformer will detect is input in single-chip microcomputer through voltage lifting circuit, voltage signal through voltage transformer output also is input in single-chip microcomputer through photoelectrical coupler, the voltage signal that single-chip microcomputer will be inputted is handled as follows: single-chip microcomputer utilizes its A/D modular converter to adopt constant duration to gather analog voltage signal, carry out A/D and be converted to the discrete sampling value of some sequences, then apply root mean square algorithm and obtain to be equivalent to the effective value of input voltage signal from the sampled value of these sequences; The voltage signal of the two-way power supply that voltage transformer will detect also is input in single-chip microcomputer through photoelectrical coupler simultaneously, single-chip microcomputer is sampled to the voltage signal of the two-way power supply by the photoelectrical coupler input, by timing and calculating, single-chip microcomputer obtains effective value and the frequency values of two-way supply voltage, and is presented in real time the effective value of this two-way supply voltage and frequency values information on LCD display; The user sets or presets effective value and the frequency values that needs the supply voltage that uses immediately by the button on control section; Whether single-chip microcomputer has button immediately to press Real-Time Monitoring,, if having, according to the key command of immediately pressing, carries out setting parameter; If do not have button immediately to press, single-chip microcomputer is effective value and the frequency values of cycle detection voltage signal; Single-chip microcomputer needs effective value and the frequency values of the supply voltage that uses to compare with above-mentioned presetting the effective value of the supply voltage of current time and frequency values, if the effective value of the supply voltage of current time or frequency values have exceeded the scope of set point, be that voltage occurs abnormal, single-chip microcomputer sends the electrical source exchange order, make electric machine rotation, drive circuit breaker disengagement failure power supply via mechanical locking structure, and be switched to another road normal power source, make and realize continued power;
Realize that the power supply automatic switchover has following manual work pattern and two kinds of patterns of automatic operation mode:
Manual work pattern is: by by key control motor drive mechanism action, with above-mentioned power supply at power supply commonly used, stand-by power supply with detained again in two minutes between three states and switch;
Automatic operation mode is: the control section of Intelligent dual-power automatic transfer switch is monitored power supply commonly used and stand-by power supply at any time, there are any phase or heterogeneous voltage and frequency abnormal conditions to occur in power supply three-phase commonly used, dead electricity even, i.e. disconnected phase time, through suitable time delay t
1, determine that power supply trouble is irreversible, when power supply commonly used can't provide normal power supply, be about to power supply commonly used and disconnect, then pass through t
2After time delays, stand-by power supply is closed, and this moment, the three-phase voltage of stand-by power supply was normal; After at stand-by power supply, moving a period of time, when power supply commonly used recovered again normal, controller was through t
3Delay confirmation power up commonly used is normal, then stand-by power supply cut off, then through t
4Time delay will be commonly used the power supply closure, and this operating process is for hauling oneself willingly into runback; When after stand-by power supply power supply certain hour, power supply commonly used recovers again normally, and no longer be switched to power supply commonly used from stand-by power supply this moment, only switches when the stand-by power supply fault, and this operating process is for hauling oneself willingly into not runback;
Realize that the program that power supply automatically switches is:
The first step, after powering on, general register and special register are carried out initialization, initialization comprising the register of timer and A/D conversion, and the initialization of display screen, sample frequency is set, and sample frequency, much larger than the frequency of two-way power supply voltage signal, turns second step after initialization is completed;
Whether second step, have dropout by circuit breaker additional alarm input, if occur threading off, alarm,, if without dropout, turned for the 3rd step;
The 3rd step, adopt the peak value detection method to carry out phase sequence to the two-way supply voltage and detect, if the power phase mistake, alarm,, if power phase is normal, turned for the 4th step;
In the 4th step, gather the two-way power supply voltage signal according to sample frequency, after completing the sampling of one-period, and the effective value of calculating voltage signal and frequency, and the effective value of voltage signal and frequency are presented on liquid crystal display screen, turned for the 5th step;
In the 5th step, judge the effective value of voltage signal and frequency whether within the permissible variation scope, when voltage effective value or frequency have exceeded the permissible variation scope, send the electrical source exchange order, make electric machine rotation, drive circuit breaker disengagement failure power supply, realize electrical source exchange.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102769448A CN102355048B (en) | 2011-09-19 | 2011-09-19 | Intelligent dual-power automatic transfer switch and running method |
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|---|---|---|---|
| CN2011102769448A CN102355048B (en) | 2011-09-19 | 2011-09-19 | Intelligent dual-power automatic transfer switch and running method |
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| CN102355048A CN102355048A (en) | 2012-02-15 |
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| CN103872760B (en) * | 2013-12-31 | 2015-03-18 | 石家庄博发科技有限公司 | Automatic power supply switching control device of transformer |
| CN104716735B (en) * | 2015-04-04 | 2017-03-01 | 佛山科学技术学院 | A kind of control circuit of simple type double-power supply switching device |
| CN104897930A (en) * | 2015-05-21 | 2015-09-09 | 国家电网公司 | Current source applying system in multi-set power distribution automation terminal remote measurement and detection and method thereof |
| CN106410949A (en) * | 2015-07-23 | 2017-02-15 | 南京理工大学常熟研究院有限公司 | Intelligent dual-power supply conversion device |
| JP6787239B2 (en) * | 2017-04-25 | 2020-11-18 | 横河電機株式会社 | Control device, control method, and control program |
| CN107896001A (en) * | 2017-12-28 | 2018-04-10 | 上海涵嘉电气设备有限公司 | A kind of Dual-power switching system controlled by intelligent wireless |
| CN108200702B (en) * | 2017-12-30 | 2023-09-15 | 湖南汇博电子科技股份有限公司 | Fire emergency lighting device and fire emergency lighting control method |
| CN109598996B (en) * | 2018-11-02 | 2021-01-29 | 深圳供电局有限公司 | Load cutting training system for distribution transformer area |
| CN110554260A (en) * | 2019-08-13 | 2019-12-10 | 威胜信息技术股份有限公司 | double-circuit voltage switching line loss measuring system and control method and device |
| CN110825206B (en) * | 2019-11-13 | 2024-03-19 | 沧州师范学院 | Computer integrated system and fault automatic switching method |
| CN110824232A (en) * | 2019-11-19 | 2020-02-21 | 安徽中研电气有限责任公司 | Power-off sensor and multi-power supply switching system for base station |
| CN111628563A (en) * | 2020-04-24 | 2020-09-04 | 合肥美的智能科技有限公司 | Power-off protection method and power-off protection device for vending machine and vending machine |
| CN111487529B (en) * | 2020-06-01 | 2021-05-04 | 泉州睿郎机电技术有限公司 | Method and device for detecting synchronism of contacts of dual-power transfer switch |
| CN111624939A (en) * | 2020-06-30 | 2020-09-04 | 中国舰船研究设计中心 | PLC-based power monitoring device and monitoring method |
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