CN109995057A - UPS current equalizing method and equipment - Google Patents
UPS current equalizing method and equipment Download PDFInfo
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- CN109995057A CN109995057A CN201810004464.8A CN201810004464A CN109995057A CN 109995057 A CN109995057 A CN 109995057A CN 201810004464 A CN201810004464 A CN 201810004464A CN 109995057 A CN109995057 A CN 109995057A
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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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
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
A kind of UPS current equalizing method and equipment can obtain the numerical value of the setup parameter of rectifier three-phase input, and determine that the absolute value for the setup parameter value difference value that the setup parameter value of the first phase input input with the second phase is not less than and set difference threshold；According to the linear combination of the setting ratio of the absolute value and the setting integral of the absolute value, control amount is determined；According to the control amount, and/or second phase current ring given to the first phase current ring of rectifier gives and controls, to reduce the first phase output electric current of rectifier and the deviation of the second phase output electric current.When UPS impact two-phase unbalanced load leads to the increase of UPS phase input current; control amount can be determined according to the deviation of UPS three-phase input; to be flowed to rectifier three-phase output electric current; so that UPS input current is transitioned into equal stream mode by uneven stream mode, avoid UPS phase input current it is excessive and cause trigger UPS current protection mechanism.
Description
Technical field
The present invention relates to uninterruptible power supply technical field more particularly to a kind of UPS current equalizing method and equipment.
Background technique
Uninterruptible power supply (Uninterruptible Power Supply, UPS) is under main road inversion power supply state, power grid
Electric energy by rectifier by convert alternating current be direct current, using inverter by DC power conversion be alternating current.It is same on main side
Under the conditions of source, main road power supply trace bypass supply, the three-phase output voltage and three-phase input voltage Phase synchronization of uninterruptible power supply.
But when UPS is exported and is driven two-phase unbalanced load, the delayed-action of bus capacitor and the wave for exporting energy
It is dynamic, it will lead to three-phase input current and there is centainly unbalanced；For example, when in the three-phase output of UPS inverter, A phase, B facies tract
It carries, when C phase is unloaded, the B phase input current that will lead to UPS rectifier is greater than A phase and C phase current.When two-phase unbalanced load is prominent
Added-time, the high frequency that IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) switch generates
Energy fluctuation caused by component can also be further exacerbated by the degree of unbalancedness of uninterruptible power supply three-phase input current.
UPS input power it is second-rate in the case where, such as under weak grid conditions, UPS phase input current increases
Add, the phase voltage that will lead in UPS three-phase input voltage is fallen；Due to power conservation, falling for the phase input voltage can also
It is further exacerbated by the increase of the phase input current.Certain phase input current is excessive, can trigger the current protection mechanism of UPS, cause not
Necessary operation；Therefore, it is urgent to provide a kind of new current share schemes to solve the above problems.
Summary of the invention
The embodiment of the invention provides a kind of UPS current equalizing method and equipment, uneven to solve existing UPS impact two-phase
Weighing apparatus load causes UPS phase input current excessive, and then the problem of triggering UPS current protection mechanism.
The embodiment of the invention provides a kind of current equalizing methods, which comprises
The numerical value of the setup parameter of rectifier three-phase input is obtained, and determines the setup parameter value and second of the first phase input
Mutually the absolute value of the setup parameter value difference value of input is not less than setting difference threshold；
According to the linear combination of the setting ratio of the absolute value and the setting integral of the absolute value, control amount is determined；
According to the control amount, and/or second phase current ring given to the first phase current ring of rectifier gives and controls
System, to reduce the first phase output electric current of rectifier and the deviation of the second phase output electric current.
Preferably, the setup parameter includes electric current；The numerical value of the setup parameter of rectifier three-phase input is obtained, and is determined
The absolute value for the setup parameter value difference value that the setup parameter value of first phase input is inputted with the second phase is not less than setting difference threshold,
It specifically includes:
Obtain the three-phase input current value of rectifier；
Determine that the first phase input current value and the difference of the second phase input current value are not less than the first difference threshold.
Preferably, the setup parameter includes voltage；The numerical value of the setup parameter of rectifier three-phase input is obtained, and is determined
The absolute value for the setup parameter value difference value that the setup parameter value of first phase input is inputted with the second phase is not less than setting difference threshold,
It specifically includes:
Obtain the three-phase input voltage value of rectifier；
Determine that the first phase input voltage value and the absolute value of the second phase input voltage value difference are not less than the second difference threshold；
Wherein, the first phase input voltage value is less than the second phase input voltage value.
Still optionally further, according to the control amount, and/or second phase current given to the first phase current ring of rectifier
Ring is given to be controlled, and is specifically included:
According to the control amount, increases the pulse width for being rectified to the input of the first phase and modulate (Pulse Width
Modulation, PWM) signal pulse width；Alternatively,
According to the control amount, reduce the pulse width of the pwm signal for being rectified to the input of the second phase；Alternatively,
According to set amount, increase the pulse width of the pwm signal for being rectified to the input of the first phase, and according to described
The difference of control amount and the set amount reduces the pulse width of the pwm signal for being rectified to the input of the second phase.
Preferably, according to the control amount, the first phase current ring of rectifier is given and/or the second phase current ring is given
Surely before being controlled, the method also includes:
Determine the control amount no more than setting limiting threshold；Alternatively,
If it is determined that the control amount is greater than setting limiting threshold, then the control amount is updated with the setting limiting threshold.
Correspondingly, the embodiment of the invention also provides a kind of equal flow devices, comprising:
Monitoring unit, the numerical value of the setup parameter for obtaining rectifier three-phase input, and determine setting for the first phase input
The absolute value for the setup parameter value difference value that parameter value is inputted with the second phase is determined not less than setting difference threshold；
Computing unit, linear group for being integrated according to the setting ratio of the absolute value and the setting of the absolute value
It closes, determines control amount；
Processing unit, for according to the control amount, and/or second phase current given to the first phase current ring of rectifier
Ring is given to be controlled, to reduce the first phase output electric current of rectifier and the deviation of the second phase output electric current.
Preferably, the setup parameter includes electric current；The monitoring unit, specifically for obtaining the three-phase input of rectifier
Current value；And determine that the first phase input current value and the difference of the second phase input current value are not less than the first difference threshold.
Preferably, the setup parameter includes voltage；The monitoring unit, specifically for obtaining the three-phase input of rectifier
Voltage value；And determine that the first phase input voltage value and the absolute value of the second phase input voltage value difference are not less than the second difference
Threshold value；Wherein, the first phase input voltage value is less than the second phase input voltage value.
Still optionally further, the processing unit, is specifically used for, and according to the control amount, increases for mutually defeated to first
Enter the pulse width of the pwm signal rectified；Alternatively, being reduced whole for being carried out to the input of the second phase according to the control amount
The pulse width of the pwm signal of stream；Alternatively, increasing the pwm signal for being rectified to the input of the first phase according to set amount
Pulse width, and according to the difference of the control amount and the set amount, reduce for inputting the PWM rectified to the second phase
The pulse width of signal.
Preferably, according to the control amount, the first phase current ring of rectifier is given and/or the second phase current ring is given
Surely before being controlled, the processing unit is also used to: determining the control amount no more than setting limiting threshold；Alternatively, if really
The fixed control amount is greater than setting limiting threshold, then updates the control amount with the setting limiting threshold.
The present invention has the beneficial effect that:
The embodiment of the invention provides a kind of UPS current equalizing method and equipment, can obtain the setting ginseng of rectifier three-phase input
Several numerical value, and determine that the absolute value for the setup parameter value difference value that setup parameter value and the second phase of the input of the first phase input is not small
In setting difference threshold；And the linear combination integrated according to the setting ratio of the absolute value and the setting of the absolute value,
Determine control amount；According to the control amount, and/or second phase current ring given progress given to the first phase current ring of rectifier
Control, to reduce the first phase output electric current of rectifier and the deviation of the second phase output electric current.That is, working as UPS impact two
When phase unbalanced load leads to the increase of UPS phase input current, control amount, and root can be determined according to the deviation of UPS three-phase input
It is adjusted according to electric current loop of the determining control amount to the correspondence phase of rectifier is given, to be carried out to rectifier three-phase output electric current
It flows, and then inhibits the increase of the UPS phase input current, so that UPS input current is transitioned into equal stream mode by uneven stream mode,
Cause to trigger UPS current protection mechanism to which avoidable UPS phase input current is excessive.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly introduced, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill in field, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 show the applicable schematic diagram of a scenario of the UPS current equalizing method in the embodiment of the present invention one；
Fig. 2 show the step flow chart of the UPS current equalizing method in the embodiment of the present invention one；
The structural schematic diagram of the equal flow device of the UPS that Fig. 3 is shown in the embodiment of the present invention two；
Fig. 4 show the structural schematic diagram of the computer installation in the embodiment of the present invention four.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention make into
It is described in detail to one step, it is clear that described embodiments are only a part of the embodiments of the present invention, rather than whole implementation
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
All other embodiment, shall fall within the protection scope of the present invention.
Embodiment one:
The embodiment of the present invention one provides a kind of UPS current equalizing method, applicable scene such as Fig. 1 of the UPS current equalizing method
It is shown, it is energy flow schematic diagram of the UPS under main road inversion power supply state, power grid electric energy is become by rectifier by alternating current
It is changed to direct current, is supplied to load by DC power conversion using inverter for alternating current.Drive two-phase uneven when UPS is exported
When load, the delayed-action of bus capacitor and the fluctuation for exporting energy, will lead to three-phase input current, there are certain unevenness
Weighing apparatus.
The UPS current equalizing method provided in this embodiment, can obtain the numerical value of the setup parameter of rectifier three-phase input, and
Determine the absolute value for the setup parameter value difference value that the setup parameter value of the first phase input is inputted with the second phase not less than setting difference
Threshold value；And the linear combination integrated according to the setting ratio of the absolute value and the setting of the absolute value, determine control
Amount；According to the control amount, and/or second phase current ring given to the first phase current ring of rectifier gives and controls, with
Reduce the first phase output electric current of rectifier and the deviation of the second phase output electric current.
That is, when UPS impact two-phase unbalanced load leads to the increase of UPS phase input current, it can be according to UPS tri-
Mutually the deviation of input determines control amount, and adjusts according to electric current loop of the determining control amount to the correspondence phase of rectifier is given
It is whole, to be flowed to rectifier three-phase output electric current, and then inhibit the increase of the UPS phase input current, so that UPS input electricity
Stream is transitioned into equal stream mode by uneven stream mode, so that avoidable UPS phase input current is excessive and causes to trigger UPS electric current guarantor
Protection mechanism.
Specifically, described as shown in Fig. 2, it is the step flow chart of UPS current equalizing method described in the embodiment of the present invention one
Method can comprise the following steps that
Step 201: obtaining the numerical value of the setup parameter of rectifier three-phase input, and determine the setup parameter of the first phase input
It is worth the absolute value of the setup parameter value difference value inputted with the second phase not less than setting difference threshold.
Preferably, the setup parameter may include electric current；Correspondingly, the number of the setup parameter of rectifier three-phase input is obtained
Value, and determine the absolute value for the setup parameter value difference value that the setup parameter value of the first phase input is inputted with the second phase not less than setting
Difference threshold may particularly include:
Obtain the three-phase input current value of rectifier；
Determine that the first phase input current value and the difference of the second phase input current value are not less than the first difference threshold.
That is, can be in real time or every setting time (can be according to actual use demand flexible setting) detection rectifier
Three-phase input current, i.e. the three-phase input current of UPS is poor not less than first in the difference for determining any two-phase input current value
It is worth threshold value, then can trigger the implementation of the UPS current equalizing method.First difference threshold can flexibly be set according to actual use demand
It sets.For example, A, B, C three-phase input current of real-time detection rectifier, determine that the current value of B phase input current inputs electricity with A phase
The difference of the current value of stream is not less than the first difference threshold.
Optionally as well, the setup parameter may also include voltage；Correspondingly, the setting ginseng of rectifier three-phase input is obtained
Several numerical value, and determine that the absolute value for the setup parameter value difference value that setup parameter value and the second phase of the input of the first phase input is not small
In setting difference threshold, may particularly include:
Obtain the three-phase input voltage value of rectifier；
Determine that the first phase input voltage value and the absolute value of the second phase input voltage value difference are not less than the second difference threshold；
Wherein, the first phase input voltage value is less than the second phase input voltage value.
That is, due to power conservation principle, if the three-phase input current of UPS, there are unbalanced, the three-phase of UPS is defeated
Enter voltage also and can exist and is unbalanced；It therefore, can be in real time or every setting time (can be according to actual use demand flexible setting)
The three-phase input voltage of rectifier, the i.e. three-phase input voltage of UPS are detected, is determining the difference of any two-phase input voltage value
Absolute value is not less than the second difference threshold, then can trigger the implementation of the UPS current equalizing method.Second difference threshold can basis
Actual use demand flexible setting.For example, A, B, C three-phase input voltage of real-time detection rectifier, determine B phase input voltage
Voltage value is less than the voltage value of A phase input voltage, and the difference of the voltage value of B phase input voltage and the voltage value of A phase input voltage
The absolute value of value is not less than the second difference threshold.
It should be noted that the three-phase input current value of rectifier and the three-phase input voltage value of rectifier can be based on
It sets hardware circuit or software program detection, the present embodiment is not limited in any way herein.
Step 202: according to the linear combination of the setting ratio of the absolute value and the setting integral of the absolute value, determining
Control amount.
That is, can be inputted in step 202 according to the setup parameter value of the first phase input detected with the second phase
Setup parameter value difference value absolute value e and setting ratio COEFFICIENT KPWith setting integral coefficient KIDetermine control amount KPe(t)+KI
∫e(t)dt.It should be noted that proportion adjustment KPE (t) is for generating adjustment effect immediately to reduce deviation, setting ratio system
Number KPValue it is bigger, deviation reduce speed it is faster, i.e., adjustment speed is faster, but excessive proportionality coefficient can make the steady of system
Qualitative decline, or even cause system unstable.Integral adjustment KI∫ e (t) dt is used to eliminate the steady-state deviation of system, improves indifference
Degree；Deviation exists, and integral adjustment carries out, until indifference, integral adjustment stops, integral adjustment KI∫ e (t) dt exports one often
Value；The power of integral action depends on setting integral coefficient KI, set integral coefficient KIValue it is smaller, integral action is stronger；Instead
It, sets integral coefficient KIValue it is bigger, integral action is weaker.
It should be noted that the control amount gives the magnitude being adjusted particularly for the electric current loop to rectifier,
It is therefore preferred that the control amount can be arranged to be used for the driving signal of rectifier (i.e. for driving opening in rectifier
Close the pwm signal of pipe) magnitude that is adjusted.The control amount can characterize duty ratio or pulse width, and the present embodiment is herein
It is not limited in any way.
Correspondingly, if step 201 specifically includes the three-phase input current value for obtaining rectifier, the first phase input current is determined
It is worth and is not less than the first difference threshold with the difference of the second phase input current value；The then settable control amount C1=KP1ei(t)+KI1
∫ei(t) dt, wherein eiIt (t) is the difference of the first phase input current value and the second phase input current value, KP1For the first setting ratio
Example coefficient, KI1For the first setting integral coefficient；First setting ratio coefficient and first setting integral coefficient can rule of thumb and
Actual use demand flexible setting.
If step 201 specifically includes the three-phase input voltage value for obtaining rectifier, the first phase input voltage value and the are determined
The absolute value of two-phase input voltage value difference is not less than the second difference threshold；Wherein, the first phase input voltage value is less than institute
State the second phase input voltage value；The then settable control amount C2=KP2eu(t)+KI2∫eu(t) dt, wherein euIt (t) is the first phase
The absolute value of input voltage value and the second phase input voltage value difference, KP2For the second setting ratio coefficient, KI2For the second setting product
Divide coefficient；Second setting ratio coefficient and second setting integral coefficient can rule of thumb and actual use demand flexible setting.
Step 203: according to the control amount, the first phase current ring of rectifier being given and/or the second phase current ring is given
Surely it is controlled, to reduce the first phase output electric current of rectifier and the deviation of the second phase output electric current.
That is, in step 201, it has been determined that UPS three-phase input current is there are unbalanced, and first phase input electricity
Flow valuve is greater than the second phase input current value (i.e. the first phase input voltage value is less than the second phase input voltage value), therefore, in step
In 203, given the first phase output electric current to reduce rectifier of the first phase current ring can be reduced according to the control amount, alternatively,
Increase that the second phase current ring is given to export electric current with the second phase for increasing rectifier, or reduce simultaneously the first phase current ring to
It is fixed, increase that the second phase current ring is given, be finally reached the first phase output electric current for reducing rectifier and the second phase export electric current
The purpose of deviation.
It is adjusted it should be noted that the electric current loop for being directed to any phase is given, it can be by any phase input pair
The pulse width of the pwm signal for each switching tube answered is adjusted to realize.If the electric current loop for reducing any phase is given,
The pulse width that any phase inputs the pwm signal of corresponding each switching tube can be increased, to increase the output of any phase
Voltage, due to power conservation, the output electric current of any phase reduces；Otherwise similarly.
Preferably, according to the control amount, and/or second phase current ring given to the first phase current ring of rectifier is given
It is controlled, be may particularly include:
According to the control amount, increase the pulse width of the pwm signal for being rectified to the input of the first phase.
The control amount is arranged to the magnitude for driving the pwm signal of the switching tube in rectifier to be adjusted,
If the control amount characterizes duty ratio, by working as the control amount and the pwm signal that is used to rectify the input of the first phase
The sum of preceding duty ratio is determined as the duty ratio of the new pwm signal for being rectified to the input of the first phase, and is accounted for according to new
Sky compares the corresponding each switching tube of the first phase input and is driven；If the control amount characterizes pulse width, by the control
It measures and is determined as new be used for the first phase with the sum of the current pulse length of the pwm signal for being rectified to the input of the first phase
The pulse width of the pwm signal rectified is inputted, and corresponding each switching tube is inputted to the first phase according to new pulse width
It is driven；Increase the first phase output voltage to reach, that is, reduces the purpose of the first phase output electric current.
Optionally as well, according to the control amount, and/or second phase current ring given to the first phase current ring of rectifier
It is given to be controlled, also it may particularly include:
According to the control amount, reduce the pulse width of the pwm signal for being rectified to the input of the second phase.
Similarly, it if the control amount characterizes duty ratio, will be used to input working as the pwm signal rectified to the second phase
The difference of preceding duty ratio and the control amount is determined as the duty ratio of the new pwm signal for being rectified to the input of the second phase,
And corresponding each switching tube is inputted to the second phase according to new duty ratio and is driven；If the control amount characterizes pulse width,
The current pulse length of pwm signal and the difference of the control amount that will be then used to rectify the input of the second phase are determined as new
Pulse width for the pwm signal rectified to the input of the second phase, and according to new pulse width to the input pair of the second phase
Each switching tube answered is driven；Reduce the second phase output voltage to reach, that is, increases the purpose of the second phase output electric current.
Optionally as well, according to the control amount, and/or second phase current ring given to the first phase current ring of rectifier
It is given to be controlled, also it may particularly include:
According to set amount, increase the pulse width of the pwm signal for being rectified to the input of the first phase, and according to described
The difference of control amount and the set amount reduces the pulse width of the pwm signal for being rectified to the input of the second phase.Its
In, the set amount is not more than the control amount, and the set amount can exist according to actual use demand flexible setting, the present embodiment
This is not limited in any way.The specific method of adjustment given for any phase current ring is similar with above content, herein no longer
It repeats.
Preferably, in step 203 according to the control amount, and/or second phase given to the first phase current ring of rectifier
Electric current loop is given controlled before, the method may also include that
Determine the control amount no more than setting limiting threshold；Alternatively,
If it is determined that the control amount is greater than setting limiting threshold, then the control amount is updated with the setting limiting threshold.
That is, in order to prevent because the amplitude of accommodation is excessive destroy UPS three-phase it is balanced, setting limit also can be preset
Width threshold value, the setting limiting threshold can be according to actual use demand flexible settings；After determining control amount, it can first determine that
Whether control amount is not more than the setting limiting threshold, if so, according to the magnitude of the control amount, to the first phase of rectifier
Electric current loop is given and/or the second phase current ring gives and is adjusted；If it is not, then according to the size of the setting limiting threshold to whole
First phase current ring of stream device is given and/or the second phase current ring gives and is adjusted, to ensure the stabilization of ups system as far as possible
Property.
It should be noted that the UPS current equalizing method can by be specially arranged MCU (Microcontroller Unit, it is micro-
Control unit) implement, it can also be implemented by the set-up function unit of the processor in the rectifier of UPS, it can also be by the processor of UPS
Set-up function unit implement, the present embodiment is not limited in any way herein.
In conclusion UPS current equalizing method provided in this embodiment, can obtain the number of the setup parameter of rectifier three-phase input
Value, and determine the absolute value for the setup parameter value difference value that the setup parameter value of the first phase input is inputted with the second phase not less than setting
Difference threshold；And the linear combination integrated according to the setting ratio of the absolute value and the setting of the absolute value, determine control
Amount processed；According to the control amount, and/or second phase current ring given to the first phase current ring of rectifier gives and controls,
To reduce the first phase output electric current of rectifier and the deviation of the second phase output electric current.That is, when UPS impact two-phase is uneven
When weighing apparatus load leads to the increase of UPS phase input current, control amount can be determined according to the deviation of UPS three-phase input, and according to determination
Control amount it is given to the electric current loop of the correspondence phase of rectifier be adjusted, to be flowed to rectifier three-phase output electric current,
And then inhibit the increase of the UPS phase input current, so that UPS input current is transitioned into equal stream mode by uneven stream mode, thus
Avoidable UPS phase input current is excessive and causes to trigger UPS current protection mechanism.
Embodiment two:
Based on same inventive concept, second embodiment of the present invention provides a kind of equal flow devices of UPS, specifically, such as Fig. 3 institute
Show, be the structural schematic diagram of the equal flow device of UPS described in the embodiment of the present invention two, it may include:
Monitoring unit 301, the numerical value of the setup parameter for obtaining rectifier three-phase input, and determine the input of the first phase
The absolute value for the setup parameter value difference value that setup parameter value is inputted with the second phase is not less than setting difference threshold；
Computing unit 302, it is linear for being integrated according to the setting ratio of the absolute value and the setting of the absolute value
Combination, determines control amount；
Processing unit 303, for according to the control amount, and/or second phase given to the first phase current ring of rectifier
Electric current loop is given to be controlled, to reduce the first phase output electric current of rectifier and the deviation of the second phase output electric current.
Preferably, the setup parameter may include electric current；The monitoring unit 301 can be specifically used for obtaining rectifier
Three-phase input current value；And determine that the difference of the first phase input current value and the second phase input current value is poor not less than first
It is worth threshold value.
Optionally as well, the setup parameter may include voltage；The monitoring unit 301 can be specifically used for obtaining rectification
The three-phase input voltage value of device；And determine the absolute value of the first phase input voltage value and the second phase input voltage value difference not
Less than the second difference threshold；Wherein, the first phase input voltage value is less than the second phase input voltage value.
Specifically, the processing unit 303, can be specifically used for,
According to the control amount, increase the pulse width of the pwm signal for being rectified to the input of the first phase；Alternatively,
According to the control amount, reduce the pulse width of the pwm signal for being rectified to the input of the second phase；Alternatively,
According to set amount, increase the pulse width of the pwm signal for being rectified to the input of the first phase, and according to described
The difference of control amount and the set amount reduces the pulse width of the pwm signal for being rectified to the input of the second phase.
Optionally, according to the control amount, the first phase current ring of rectifier is given and/or the second phase current ring is given
Surely before being controlled, the processing unit 303 can also be used in:
Determine the control amount no more than setting limiting threshold；Alternatively,
If it is determined that the control amount is greater than setting limiting threshold, then the control amount is updated with the setting limiting threshold.
In conclusion the equal flow device of UPS in the embodiment of the present invention two, it may include for obtaining rectifier three-phase input
The numerical value of setup parameter, and determine the absolute of the setup parameter value difference value that setup parameter value and the second phase of the input of the first phase input
Value is not less than the monitoring unit of setting difference threshold, for according to the setting ratio of the absolute value and the setting of the absolute value
The linear combination of integral determines the computing unit of control amount and is used for according to the control amount, to the first phase electricity of rectifier
Stream ring is given and/or the second phase current ring is given is controlled, to reduce the first phase output electric current of rectifier and second mutually defeated
The processing unit of the deviation of electric current out.That is, when the two-phase unbalanced load of UPS impact causes UPS phase input current to increase
Added-time can determine control amount according to the deviation of UPS three-phase input, and according to determining control amount to the electricity of the correspondence phase of rectifier
Stream ring is given to be adjusted, and to be flowed to rectifier three-phase output electric current, and then inhibits the increasing of the UPS phase input current
Add so that UPS input current is transitioned into equal stream mode by uneven stream mode, thus can avoid UPS phase input current it is excessive and
Cause to trigger UPS current protection mechanism.
Embodiment three:
The embodiment of the present invention three provides a kind of computer readable storage medium, for being stored as used in above-mentioned calculating equipment
Computer program instructions, it includes the programs for executing above-mentioned UPS current equalizing method.
The computer storage medium can be any usable medium or data storage device that computer can access, packet
Include but be not limited to magnetic storage (such as floppy disk, hard disk, tape, magneto-optic disk (MO) etc.), optical memory (such as CD, DVD,
BD, HVD etc.) and semiconductor memory (such as it is ROM, EPROM, EEPROM, nonvolatile memory (NAND FLASH), solid
State hard disk (SSD)) etc..
Example IV:
The embodiment of the present invention four provides a kind of computer installation, as shown in figure 4, it is described in the embodiment of the present invention
Calculate the structural schematic diagram of equipment.The calculating equipment is specifically as follows desktop computer, portable computer, smart phone, puts down
Plate computer, personal digital assistant (Personal Digital Assistant, PDA) etc..Specifically, institute in the embodiment of the present invention
The calculating equipment stated may include memory, such as central processing unit (Center Processing Unit, CPU) 401, memory
402, input equipment 403 and output equipment 404 etc., input equipment 403 may include keyboard, mouse, touch screen etc., and output is set
Standby 404 may include display equipment, such as liquid crystal display (Liquid Crystal Display, LCD), cathode-ray tube
(Cathode Ray Tube, CRT) etc..
Memory 402 may include read-only memory (ROM) and random access memory (RAM), and to central processing unit
The program instruction and data stored in 401 offer memories 402.In embodiments of the present invention, memory 402 can be used for storing
The program of UPS current equalizing method.
Central processing unit 401 by call memory 402 store program instruction, central processing unit 401 can be used for according to
The program instruction of acquisition executes: obtaining the numerical value of the setup parameter of rectifier three-phase input, and determines the setting of the first phase input
The absolute value for the setup parameter value difference value that parameter value is inputted with the second phase is not less than setting difference threshold；According to the absolute value
The linear combination of the setting integral of setting ratio and the absolute value, determines control amount；According to the control amount, to rectifier
First phase current ring is given and/or the second phase current ring is given is controlled, with reduce the first phase output electric current of rectifier with
The deviation of second phase output electric current.
In addition, any number of elements in drawing and description be used to example rather than limit and it is any name all only
For distinguishing, without any restrictions meaning.
It will be understood by those skilled in the art that the embodiment of the present invention can provide as method, apparatus (equipment) or computer journey
Sequence product.Therefore, complete hardware embodiment, complete software embodiment or combining software and hardware aspects can be used in the present invention
The form of embodiment.Moreover, it wherein includes the calculating of computer usable program code that the present invention, which can be used in one or more,
The computer program implemented in machine usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
The form of product.
The present invention be referring to according to the method for the embodiment of the present invention, the flow chart of device (equipment) and computer program product
And/or block diagram describes.It should be understood that each process in flowchart and/or the block diagram can be realized by computer program instructions
And/or the combination of the process and/or box in box and flowchart and/or the block diagram.It can provide these computer programs to refer to
Enable the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to generate
One machine so that by the instruction that the processor of computer or other programmable data processing devices executes generate for realizing
The device for the function of being specified in one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions can also be loaded into computer or other programmable data processing devices, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of UPS current equalizing method, which is characterized in that the described method includes:
The numerical value of the setup parameter of rectifier three-phase input is obtained, and determines the setup parameter value of the first phase input and second mutually defeated
The absolute value of the setup parameter value difference value entered is not less than setting difference threshold；
According to the linear combination of the setting ratio of the absolute value and the setting integral of the absolute value, control amount is determined；
According to the control amount, and/or second phase current ring given to the first phase current ring of rectifier gives and controls, with
Reduce the first phase output electric current of rectifier and the deviation of the second phase output electric current.
2. UPS current equalizing method as described in claim 1, which is characterized in that the setup parameter includes electric current；
The numerical value of the setup parameter of rectifier three-phase input is obtained, and determines the setup parameter value of the first phase input and second mutually defeated
The absolute value of the setup parameter value difference value entered is specifically included not less than setting difference threshold:
Obtain the three-phase input current value of rectifier；
Determine that the first phase input current value and the difference of the second phase input current value are not less than the first difference threshold.
3. UPS current equalizing method as described in claim 1, which is characterized in that the setup parameter includes voltage；
The numerical value of the setup parameter of rectifier three-phase input is obtained, and determines the setup parameter value of the first phase input and second mutually defeated
The absolute value of the setup parameter value difference value entered is specifically included not less than setting difference threshold:
Obtain the three-phase input voltage value of rectifier；
Determine that the first phase input voltage value and the absolute value of the second phase input voltage value difference are not less than the second difference threshold；Its
In, the first phase input voltage value is less than the second phase input voltage value.
4. UPS current equalizing method as claimed in claim 2 or claim 3, which is characterized in that according to the control amount, to the of rectifier
One phase current ring is given and/or the second phase current ring gives and controlled, and specifically includes:
According to the control amount, increase the pulse width of the pwm signal for being rectified to the input of the first phase；Alternatively,
According to the control amount, reduce the pulse width of the pwm signal for being rectified to the input of the second phase；Alternatively,
According to set amount, increase the pulse width of the pwm signal for being rectified to the input of the first phase, and according to the control
The difference of amount and the set amount reduces the pulse width of the pwm signal for being rectified to the input of the second phase.
5. UPS current equalizing method as described in claim 1, which is characterized in that according to the control amount, to the first of rectifier
Phase current ring is given and/or the second phase current ring gives before being controlled, the method also includes:
Determine the control amount no more than setting limiting threshold；Alternatively,
If it is determined that the control amount is greater than setting limiting threshold, then the control amount is updated with the setting limiting threshold.
6. a kind of equal flow device of UPS characterized by comprising
Monitoring unit, the numerical value of the setup parameter for obtaining rectifier three-phase input, and determine the setting ginseng of the first phase input
The absolute value for the setup parameter value difference value that numerical value is inputted with the second phase is not less than setting difference threshold；
Computing unit, the linear combination for being integrated according to the setting ratio of the absolute value and the setting of the absolute value, really
Determine control amount；
Processing unit, for being given to the first phase current ring of rectifier and/or the second phase current ring being given according to the control amount
Surely it is controlled, to reduce the first phase output electric current of rectifier and the deviation of the second phase output electric current.
7. the equal flow device of UPS as claimed in claim 6, which is characterized in that the setup parameter includes electric current；
The monitoring unit, specifically for obtaining the three-phase input current value of rectifier；And determine the first phase input current value
It is not less than the first difference threshold with the difference of the second phase input current value.
8. the equal flow device of UPS as claimed in claim 6, which is characterized in that the setup parameter includes voltage；
The monitoring unit, specifically for obtaining the three-phase input voltage value of rectifier；And determine the first phase input voltage value
It is not less than the second difference threshold with the absolute value of the second phase input voltage value difference；Wherein, the first phase input voltage value is small
In the second phase input voltage value.
9. the equal flow device of UPS as claimed in claim 7 or 8, which is characterized in that the processing unit is specifically used for,
According to the control amount, increase the pulse width of the pwm signal for being rectified to the input of the first phase；Alternatively,
According to the control amount, reduce the pulse width of the pwm signal for being rectified to the input of the second phase；Alternatively,
According to set amount, increase the pulse width of the pwm signal for being rectified to the input of the first phase, and according to the control
The difference of amount and the set amount reduces the pulse width of the pwm signal for being rectified to the input of the second phase.
10. the equal flow device of UPS as claimed in claim 6, which is characterized in that according to the control amount, to the of rectifier
One phase current ring is given and/or the second phase current ring gives before being controlled, and the processing unit is also used to:
Determine the control amount no more than setting limiting threshold；Alternatively,
If it is determined that the control amount is greater than setting limiting threshold, then the control amount is updated with the setting limiting threshold.
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| CN113113964A (en) * | 2021-03-31 | 2021-07-13 | 漳州科华技术有限责任公司 | UPS current-sharing control method and UPS |
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| CN109995057B (en) | 2020-11-20 |
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