CN109412259A - Three-way power inputs UPS control circuit and power-supply switching method - Google Patents
Three-way power inputs UPS control circuit and power-supply switching method Download PDFInfo
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- CN109412259A CN109412259A CN201811527223.8A CN201811527223A CN109412259A CN 109412259 A CN109412259 A CN 109412259A CN 201811527223 A CN201811527223 A CN 201811527223A CN 109412259 A CN109412259 A CN 109412259A
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000012423 maintenance Methods 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 7
- 239000003990 capacitor Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 3
- 230000003068 static effect Effects 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 4
- 230000001052 transient effect Effects 0.000 description 4
- 238000011084 recovery Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/08—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems requiring starting of a prime-mover
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
The present invention relates to power supply technical fields, UPS control circuit and power-supply switching method are inputted more particularly, to a kind of three-way power, it includes main power source input module S1 and load that three-way power, which inputs UPS control circuit, it is characterized in that, one end of the main power source input module S1 is electrically connected at mains ac power supply, the other end of the main power source input module S1 is electrically connected at the load, the load is also parallel with backup power source S2, ups power is also in series between the load and the backup power source S2, in main power source input module S1 closure, the backup power source S2 is disconnected, the ups power tracks the phase of the main power source input module S1 current supply circuit, amplitude, voltage and electric current.The present invention has in mains AC power-off, the effect of seamless switching backup power source.
Description
Technical field
The present invention relates to power supply technical field, more particularly, to a kind of three-way power input UPS control circuit and
Power-supply switching method.
Background technique
Currently, be mainly powered by alternating current in many integrated mills or building, and in order to which emergency case leads to alternating current
Power-off, it will usually be provided with backup power source S2, and when alternating current power-off is switched to backup power source S2, due to mains-supplied with it is spare
Power supply S2 is three-phase alternating current, and mains-supplied and backup power source S2 there are phase differences, such as directly cut when alternating current powers off
It is changed to backup power source S2, may cause switch ends transient state pressure difference very causes greatly to switch tripping or damage.Therefore switching
Backup power source S2 or when switching back into mains-supplied from backup power source S2, can have even tens seconds several seconds time differences, influence work
The Working Life of personnel in production or building in factory.
Summary of the invention
The object of the present invention is to provide one kind when mains AC powers off, and the three-way power of seamless switching backup power source is defeated
Enter UPS control circuit and power-supply switching method.
Foregoing invention purpose one of the invention has the technical scheme that
A kind of three-way power input UPS control circuit, including main power source input module S1 and load, the main power source input module
One end of S1 is electrically connected at mains ac power supply, and the other end of the main power source input module S1 is electrically connected at described negative
It carrying, the load is also parallel with backup power source S2, it is also in series with ups power between the load and the backup power source S2,
In main power source input module S1 closure, the backup power source S2 is disconnected, and the ups power tracks the main power source input
Phase, amplitude, voltage and the electric current of module S1 current supply circuit.
By using above-mentioned technical proposal, by the ups power being connected in parallel on backup power source S2, and main power source input module
When S1 is connected, real-time tracing and phase, amplitude, voltage and the electric current etc. for synchronizing the main power source input module S1 current supply circuit
Power attributes, when connecting the failure of main power source input module S1 of alternating current leads to power-off, since ups power has synchronized master
The power attributes of Power Entry Module S1 then can be achieved directly to be switched to ups power and be powered load, without will lead to out
Both ends transient state pressure difference is closed to cause greatly very much to switch tripping or damage；It is traceable and synchronize standby when the conducting of backup power source S2
It can directly be switched to main power source input module S1 power supply again when city power recovery power supply with the power attributes of power supply S2.
The present invention is further arranged to: the ups power includes rectifier and inverter；The rectifier and the inversion
Device is serially connected, and one end of the backup power source S2 is connected with one end of the rectifier, and the other end of the rectifier is electrical
One end of connection and the inverter, the other end of the inverter are electrically connected at the load.
Further, super capacitor is also parallel between the rectifier and the inverter.
It can be direct current by the AC conversion of alternating current by the rectifier in ups power by using above-mentioned technical proposal
Electricity stores electric energy by super capacitor in parallel；When ups power is powered load, super capacitor is to storage
Electric energy discharged, alternating current is converted by inverter, be load supplying.
The present invention is further arranged to: three-way power input UPS control circuit further include the first isolating transformer and
Second isolating transformer, first isolating transformer are series at the main power source input module S1 series connection, second isolation
Transformer series are between the inverter and the load.
By using above-mentioned technical proposal, first is in series in the inverter of main power source input module S1 and ups power
Isolating transformer and the second isolating transformer make the electrical completely insulated of primary side and secondary side, are also isolated the circuit；It utilizes
The big feature of the high-frequency loss of its iron core, so that high frequency spurs be inhibited to be passed to control loop.
The present invention is further arranged to: the load is also electrically connected with generator power supply.
It is connected with Compact Power Plant, can be to build by being connected with generator power supply by using above-mentioned technical proposal
Object inner core equipment, such as mass computing center are built, is powered, meanwhile, in alternating current power-off, it is possible to use generator power supply
It is powered, also plays the effect of backup power source S2.
The present invention is further arranged to: the main power source input module S1 is also parallel with manual maintenance bypass switch, described
Manual maintenance bypass switch is normal open switch.
By using above-mentioned technical proposal, being connected with manual maintenance bypass switch can be to provide safety when repair circuit.
Foregoing invention purpose two of the invention has the technical scheme that
A kind of power-supply switching method, the power-supply switching method include the following steps:
S10: in alternating current normal power supply, main power source input module S1 is load supplying, wherein the main power source input module S1
It is that the main power source that three-way power as claimed in any one of claims 1 to 6 inputs in UPS control circuit inputs mould with the load
Block S1 and load；
S20:UPS power sources in parallel is cut the backup power source S2 and is disconnected, the ups power real-time tracing is simultaneously same in backup power source S2
Walk phase, amplitude, voltage and the electric current of the main power source input module S1, wherein the ups power and the backup power source
S2 is the ups power and backup power source S2 that three-way power described in claim 1-6 any one inputs in UPS control circuit；
S30: if the municipal power failure, the main power source input module S1 is disconnected, and the load automatic switch is the standby electricity
Source S2 power supply.
Further, the step S30 includes:
S31: the ups power is the load according to phase, amplitude, voltage and the electric current of the main power source input module S1
Power supply；
S32: after several period waves, being closed the backup power source S2, is the load supplying by the backup power source S2.
By using above-mentioned technical proposal, by the ups power being connected in parallel on backup power source S2, and main power source input module
When S1 is connected, real-time tracing and phase, amplitude, voltage and the electric current etc. for synchronizing the main power source input module S1 current supply circuit
Power attributes, when connecting the failure of main power source input module S1 of alternating current leads to power-off, since ups power has synchronized master
The power attributes of Power Entry Module S1 then can be achieved directly to be switched to ups power and be powered load, without will lead to out
Both ends transient state pressure difference is closed to cause greatly very much to switch tripping or damage；It is traceable and synchronize standby when the conducting of backup power source S2
It can directly be switched to main power source input module S1 power supply again when city power recovery power supply with the power attributes of power supply S2.
In conclusion advantageous effects of the invention are as follows:
1. by the ups power being connected in parallel on backup power source S2, and when main power source input module S1 conducting, real-time tracing and synchronization
The power attributes such as phase, amplitude, voltage and the electric current of the main power source input module S1 current supply circuit, as the master of connection alternating current
When the failure of Power Entry Module S1 leads to power-off, since ups power synchronizes the power supply category of main power source input module S1
Property, then it can be achieved directly to be switched to ups power and be powered load, draw greatly very much without will lead to switch ends transient state pressure difference
Play switch tripping or damage；
2. traceable and synchronized reserve power supply S2 power attributes can when city power recovery power supply when the conducting of backup power source S2
It is directly switched to main power source input module S1 power supply again.
Detailed description of the invention
Fig. 1 is electrical block diagram of the invention.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
Embodiment one:
Referring to Fig.1, input UPS control circuit for a kind of three-way power disclosed by the invention, including main power source input module S1 and
Load.The one end main power source input module S1 is electrically connected at mains ac power supply, is powered by mains AC.Main power source input
The other end of module S1 is connected with load, and the main power source input module S1 load that is negative is powered.Mains AC event in order to prevent
Barrier or power-off, load is also connected with backup power source S2, and when mains AC is normal, main power source input module S1 conducting is spare
Power supply S2 is disconnected.Backup power source S2 is powered by battery or generator, on the current supply circuit of backup power source S2, also
It is in series with ups power, one end of the ups power is also parallel to the first isolating transformer, for tracking and synchronizing main power source input
Phase, amplitude, voltage and the electric current of module S1 current supply circuit.First isolating transformer is series at main power source input module S1
Series connection.
The ups power includes concatenated rectifier and inverter, and rectifier and inverter are once series at backup power source S2
Between load, i.e., one end of backup power source S2 is power input, and the other end is series at rectifier, rectifier and inverter string
Connection, is series at load in the other end of inverter.It is also parallel with super capacitor between rectifier and inverter, electric energy is carried out
Storage.In order to meet the standard of voltage, in the present embodiment, specially two super capacitor series connection.
In order to protect circuit, the second isolating transformer is also in series between inverter and load.
It further include generator power supply, specifically, the generator power supply can be Compact Power Plant, which is negative
Load is powered, and especially in integrated mill or facility, is supplied important equipment such as some mass computing centers
Electricity.
Main power source input module S1 is also parallel with manual maintenance bypass switch, which is normally opened open
It closes, in ups power failure, manual maintenance bypass switch conducting, main power source input module S1 is disconnected, and makes ups power and load
It disconnects, convenient for being repaired to ups power.
Embodiment two:
The invention also discloses a kind of power-supply switching methods, specifically comprise the following steps:
S10: in alternating current normal power supply, main power source input module S1 is load supplying, wherein main power source input module S1 and negative
Carry main power source input module S1 and the load inputted in UPS control circuit for the three-way power recorded in embodiment one；
S20:UPS power sources in parallel cuts backup power source S2 disconnection, ups power real-time tracing and synchronous main power source in backup power source S2
Phase, amplitude, voltage and the electric current of input module S1, wherein ups power and backup power source S2 are to record in embodiment one
Three-way power inputs the ups power and backup power source S2 in UPS control circuit；
S30: if municipal power failure, main power source input module S1 is disconnected, and load automatic switch is backup power source S2 power supply.
Further, step S30 includes:
S31:UPS power supply is load supplying according to the phase of main power source input module S1, amplitude, voltage and electric current；
S32: after several period waves, being closed backup power source S2, is load supplying by backup power source S2.
The present embodiment specific embodiment are as follows:
Under normal circumstances, the static switching switch conduction of main power source input module S1, main inverter, the i.e. rectification of ups power
Device, regulating system output voltage carry out PWM adjusting according to error, systems stabilisation is defeated by output voltage compared with voltage reference value
Voltage out.The output frequency and phase of main inverter are identical as alternating current input frequency.Delta inverter, the i.e. inversion of ups power
Device determines current reference according to load and battery charging condition, and by output electric current compared with current reference, stablizes output electricity
Stream also compensates for line voltage and defeated by amplitude, phase and the waveform of the input current of Delta inverter control line voltage
Difference between voltage out.Delta inverter is also the controlled current source with alternating current input power with frequency with phase.
When the input voltage of mains AC is equal with system output voltage, alternating current is directly negative through Delta transformer
Power supply is carried, bearing power is without any transformation, therefore the loss of inactivity transformation.
When mains AC input piezoelectric voltage is lower than system output voltage, main inverter absorbs power, warp from output end
Main inverter, Delta inverter make the second isolating transformer primary side generate positive polarity compensation to Delta transformer output power
Voltage, so that the voltage of current supply circuit keeps balance.Simultaneously under the control of Delta inverter, increase the electricity inputted from alternating current
Stream and power, so that the electric current (power) of power-balance point keeps balance.
When mains AC input voltage is higher than system output voltage, power is absorbed from Delta transformer, it is absorbed
Power flows counterflow through above-mentioned loop, that is, the power absorbed is through Delta inverter, after main inverter, flow direction load.So that power is flat
The power of weighing apparatus point keeps balance.Delta inverter works in rectifier system at this time, makes the generation of Delta transformer primary side and alternating current
The voltage of voltage inversion carries out negative polarity compensation, so that the voltage of current supply circuit keeps balance.
When no matter line voltage is equal or unequal with system output voltage, ups power can charge a battery.
It is compared, the electric current of Delta inverter by Delta inverter by detection DC bus voltage with input current benchmark
Benchmark is generally adjusted to DC bus voltage can be made to be maintained at battery floating charge pressure numerically, if under DC bus voltage
The output electric current of drop, Delta inverter will increase, so that mains input current increases.Because flowing into the power of power-balance point
Greater than the power that load needs, extra power just flows into DC bus by main inverter, charges a battery, and D/C voltage is restored
Afterwards, mains input current will revert to load supplying normal condition.
When mains power fails, main inverter is continued to run by storage battery power supply, undertakes whole bearing powers.City at this time
The static switching switch of electricity input disconnects, to prevent main inverter from feeding back energy to mains supply.Storage is transformed by normal mode
The conversion time of energy mode is zero, and output voltage is without interruption.Because main inverter is connected to system output always.
When UPS equipment failure, manual maintenance bypass switch switch connection, the static switching switch of main power source input module
It disconnects, the manual maintenance bypass switch of alternating current is directly load supplying.The static switching switch of backup power source disconnects at this time, makes UPS
Equipment and load disconnect.
The embodiment of present embodiment is presently preferred embodiments of the present invention, not limits protection of the invention according to this
Range, therefore: the equivalence changes that all structures under this invention, shape, principle are done, should all be covered by protection scope of the present invention it
It is interior.
Claims (8)
1. a kind of three-way power inputs UPS control circuit, including main power source input module S1 and load, which is characterized in that described
One end of main power source input module S1 is electrically connected at mains ac power supply, and the other end of the main power source input module S1 is electrical
It is connected to the load, the load is also parallel with backup power source S2, also goes here and there between the load and the backup power source S2
It is associated with ups power, in main power source input module S1 closure, the backup power source S2 is disconnected, and the ups power tracks institute
State phase, amplitude, voltage and the electric current of main power source input module S1 current supply circuit.
2. a kind of three-way power as described in claim 1 inputs UPS control circuit, which is characterized in that the ups power includes
Rectifier and inverter；The rectifier and the inverter are serially connected, one end of the backup power source S2 and the rectification
One end of device is connected, and the other end of the rectifier is electrically connected one end with the inverter, the other end of the inverter
It is electrically connected at the load.
3. a kind of three-way power as claimed in claim 2 inputs UPS control circuit, which is characterized in that in the rectifier and
Super capacitor is also parallel between the inverter.
4. a kind of three-way power as described in claim 1 inputs UPS control circuit, which is characterized in that the three-way power is defeated
Entering UPS control circuit further includes the first isolating transformer and the second isolating transformer, and first isolating transformer is series at institute
Main power source input module S1 is stated, second isolating transformer is series between the inverter and the load.
5. a kind of three-way power as described in claim 1 inputs UPS control circuit, which is characterized in that the load is also electrically
It is connected with generator power supply.
6. a kind of three-way power as described in claim 1 inputs UPS control circuit, which is characterized in that the main power source input
Module S1 is also parallel with manual maintenance bypass switch, and the manual maintenance bypass switch is normal open switch.
7. a kind of power-supply switching method, which is characterized in that the power-supply switching method includes the following steps:
S10: in alternating current normal power supply, main power source input module S1 is load supplying, wherein the main power source input module S1
It is that the main power source that three-way power as claimed in any one of claims 1 to 6 inputs in UPS control circuit inputs mould with the load
Block S1 and load；
S20:UPS power sources in parallel is cut the backup power source S2 and is disconnected, the ups power real-time tracing is simultaneously same in backup power source S2
Walk phase, amplitude, voltage and the electric current of the main power source input module S1, wherein the ups power and the backup power source
S2 is the ups power and backup power source S2 that three-way power described in claim 1-6 any one inputs in UPS control circuit；
S30: if the municipal power failure, the main power source input module S1 is disconnected, and the load automatic switch is the standby electricity
Source S2 power supply.
8. a kind of power-supply switching method as claimed in claim 7, which is characterized in that the step S30 includes:
S31: the ups power is the load according to phase, amplitude, voltage and the electric current of the main power source input module S1
Power supply；
S32: after several period waves, being closed the backup power source S2, is the load supplying by the backup power source S2.
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| CN201811527223.8A CN109412259A (en) | 2018-12-13 | 2018-12-13 | Three-way power inputs UPS control circuit and power-supply switching method |
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| CN201811527223.8A CN109412259A (en) | 2018-12-13 | 2018-12-13 | Three-way power inputs UPS control circuit and power-supply switching method |
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| CN110676928A (en) * | 2019-09-24 | 2020-01-10 | 中广核研究院有限公司 | Auxiliary power supply method and device for marine small-sized reactor important system |
| CN110768366A (en) * | 2019-10-30 | 2020-02-07 | 上海核工程研究设计院有限公司 | Hydrogen igniter power supply system suitable for passive advanced pressurized water reactor |
| CN111030285A (en) * | 2019-12-20 | 2020-04-17 | 科华恒盛股份有限公司 | Uninterrupted power supply phase-locking implementation method and terminal equipment |
| CN112436597A (en) * | 2020-11-25 | 2021-03-02 | 国家电网有限公司 | Power supply switching method and device |
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