CN104333023B - UPS three-phase input equal current-sharing controller and the current-sharing control method of UPS - Google Patents
UPS three-phase input equal current-sharing controller and the current-sharing control method of UPS Download PDFInfo
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- CN104333023B CN104333023B CN201410605954.5A CN201410605954A CN104333023B CN 104333023 B CN104333023 B CN 104333023B CN 201410605954 A CN201410605954 A CN 201410605954A CN 104333023 B CN104333023 B CN 104333023B
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Abstract
The present invention relates to ups system and control technical field, specifically disclose a kind of UPS three-phase input equal current-sharing controller and the current-sharing control method of UPS, controller includes: input voltage diagnosis apparatus, and for the input voltage of UPS is detected in real time, judged, and selection control suitably gives voltage；Actuator, for regulating the output voltage of booster converter；And PWM generator, for the output voltage of actuator is converted to pwm signal.Input voltage and d-c bus voltage value are detected by controller in real time, and when detecting that arbitrary phase input voltage exceedes certain limit, controller increases the output set-point of booster converter, makes input voltage peak value within the output voltage range of booster converter.The present invention promotes busbar voltage accordingly by the amplitude judging input voltage makes three-phase input current-sharing, it is to avoid damage owing to the uneven conductance of input causes UPS.
Description
Technical field
The present invention relates to ups system and control technical field, particularly to a kind of UPS three-phase input equal current-sharing controller
And the current-sharing control method of UPS.
Background technology
Communication uninterrupted power source (UPS) the industry standard YD/T 1095-2008 input on line type UPS
Voltage variable area requirement is as follows:
It is to say, UPS to reach 1 class standard, the maximum of its input phase voltage needs to reach 275V.
In actual use, can there is certain deviation and unbalanced situation in the voltage of three phase network,
Especially in some remote districts and rural area, the power of substation transformer is not the most very big, these
The voltage ripple of power network in area can be bigger.And along with the development of society, the electrical equipment in these areas is again soon
The increase of speed, and major part is all single-phase load, so make that phase voltage that single-phase load connect by
Excessive thus be pulled low in load, other two phase voltages are higher, thus cause three-phase power grid voltage to be likely to occur
Serious unbalanced situation.
When the three-phase input phase voltage of UPS is any one mutually excessive and occurs uneven, three-phase can be caused to input
Current unevenness stream.When seriously uneven and UPS load capacity is bigger for three-phase input current, electric current maximum
That is crossed conference due to electric current and causes the internal component of UPS to damage because of the super rule of electric current.
Summary of the invention
For solving the problems referred to above, the present invention provides a kind of UPS three-phase input equal current-sharing controller, and it can detect in real time
Input voltage and the value of DC bus-bar voltage, and regulate output voltage values according to input voltage value, make input electricity
Within being pressed in the span of control of booster converter, keeping three-phase to be in equal stream mode all the time, protection components and parts are not
Damaged.
The present invention also provides for UPS device and the sharing control of this device with above-mentioned three-phase equalizing controller
Method.
For achieving the above object, the technical solution adopted in the present invention is:
A kind of UPS three-phase input equal current-sharing controller, comprising: input voltage diagnosis apparatus, for UPS
Input voltage detect in real time, judge, and selection control suitably gives voltage；Actuator, uses
Output voltage in regulation booster converter；And PWM generator, for the output voltage of actuator is turned
It is changed to pwm signal.
A kind of UPS device, its three-phase input equal current-sharing controller described in tool.
A kind of UPS three-phase input current-sharing control method, wherein UPS include commutator, booster converter with
And controller, described controller includes input voltage diagnosis apparatus, for carrying out the input voltage of UPS in real time
Detection, judgement, and selection control suitably give voltage；Actuator, for regulating booster converter
Output voltage；And PWM generator, for the output voltage of actuator is converted to pwm signal；Input
Input voltage is detected by voltage diagnosis apparatus in real time, when input voltage diagnosis apparatus detects arbitrary phase input electricity
When pressure exceedes certain limit, select the most given voltage to booster converter, make input voltage peak value rise
Within the output voltage range of buckling parallel operation, it is to avoid input voltage fills dc-link capacitance and causes input inequality
Stream.
Described UPS three-phase inputs current-sharing control method specifically:
When the peak value any one phase input voltage being detected is less than the output voltage Vdc of booster converter,
Using Vdc_ref0 as the given voltage of actuator.
When detect the peak value of any one phase input voltage booster converter output voltage Vdc extremely
Time in the range of K1*Vdc, using Vdc_ref1 giving as actuator, the control signal of controller changes
Become so that the output voltage of booster converter is finally stable at Vdc1, Vdc1=Vdc_ref1.
When peak value three-phase input voltage being detected is less than Vdc, again using Vdc_ref0 as actuator
Given, the control signal of controller changes so that the output voltage of booster converter is finally stable to exist
Vdc, Vdc=Vdc_ref0.
When detecting in the range of the peak value of any one phase input voltage is at K1*Vdc to K2*Vdc, will
Vdc_ref2 giving as actuator, the control signal of controller changes so that booster converter
Output voltage is finally stable at Vdc2, Vdc2=Vdc_ref2.
When detecting in the range of the peak value of three-phase input voltage is at Vdc to K1*Vdc, again will
Vdc_ref1 giving as actuator, the control signal of controller changes so that booster converter
Output voltage is finally stable at Vdc1, Vdc1=Vdc_ref1.
Preferably, described Vdc value is 360V when UPS nominal operation.
Preferably, described Vdc_ref0 value is 360V.
Preferably, described Vdc_ref1 value is 375V.
Preferably, described Vdc_ref2 value is 390V.
Preferably, described K1 value is 1.042.
Preferably, described K2 value is 1.083.
UPS three-phase input equal current-sharing controller of the present invention and the current-sharing control method of UPS, it has the beneficial effect that
This controller has input voltage diagnosis apparatus, can detect arbitrary phase voltage of UPS judge it
Whether more than output voltage Vdc value, actuator carries out voltage for the set-point of the selection of input voltage diagnosis apparatus
Regulation, it is to avoid input voltage is more than output voltage, makes three-phase input current-sharing.
UPS three-phase input equal current-sharing controller of the present invention and the current-sharing control method of UPS, its beneficial effect
For:
This control method promotes busbar voltage accordingly by the amplitude judging input voltage and makes three-phase input all
Stream, it is to avoid damage owing to the uneven conductance of input causes UPS, extend the service life of UPS.
Accompanying drawing explanation
Fig. 1 is the structure chart of embodiment of the present invention ups system；
Fig. 2 is the structural representation of embodiment of the present invention UPS three-phase input equal current-sharing controller.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to the present invention
It is described in further detail.
Embodiment:
Refer to Fig. 1, on line type UPS of the present invention, by AC-DC commutator, DC-DC boosting inverter
Device and equalizing controller composition, during UPS nominal operation, its DC bus-bar voltage threshold value is Vdc, when input phase
When the peak value of voltage is more than Vdc, equalizing controller changes the set-point of booster converter, makes dc bus electricity
Pressure is raised.
Under normal circumstances, the input voltage of booster circuit is less than output voltage, and such booster circuit normally works
Time output voltage stabilization can be made at Vdc.When the input voltage of booster circuit is more than output voltage, output electricity
Pressure is not controlled by booster circuit, and now input voltage is directly poured on dc-link capacitance, output voltage
Depend on the peak value of input voltage.
When three-phase input voltage is consistent and peak value is both greater than Vdc, it is female that three-phase input voltage all can fill direct current
Line capacitance, now three-phase input current depends on the impedance of three-phase input circuit, when the resistance of three-phase input circuit
When resisting inconsistent, input current will be uneven.
When three-phase voltage peak value is less than Vdc, by software equal Flow Technique, three-phase input can be kept
Current-sharing；When occurring that input voltage fills dc-link capacitance, DC bus-bar voltage is uncontrolled, software current-sharing control
System cannot play a role.
When three-phase input voltage arbitrary phase peak value is more than Vdc and during imbalance of three-phase voltage, input voltage is
Its input current of that high phase is maximum, and its input current of that phase that input voltage is minimum is minimum, now can
Cause serious input not current-sharing.
Refer to Fig. 2, UPS three-phase equalizing controller of the present invention, it includes that input voltage judges
Device, for the input voltage of UPS is detected in real time, judges, and the suitably given electricity of selection control
Pressure；Actuator, for regulating the output voltage of booster converter；And PWM generator, for regulating
The output voltage of device is converted to pwm signal.
Input voltage is detected by the input voltage diagnosis apparatus of controller in real time, when input voltage diagnosis apparatus
Detect when arbitrary phase input voltage exceedes certain limit, select the most given voltage to booster converter,
Make input voltage peak value within the output voltage range of booster converter, it is to avoid input voltage fills dc bus
Electric capacity causes the phenomenon inputting not current-sharing.
It is operated in the probability of high voltage in order to reduce dc-link capacitance, two grades or many grades can be divided into increase
The output set-point of big DC-DC boost converter, specific as follows:
When the peak value output voltage less than DC-DC boost converter any one phase input voltage being detected
During Vdc, using Vdc_ref0 as the given voltage of actuator, Vdc value can be taken as 360V, now Vdc_ref
For 360V.
As the peak value output voltage Vdc in DC-DC boost converter any one phase input voltage being detected
Time to 1.042Vdc, using Vdc_ref1 giving as controller, the control signal of controller is sent out
Raw change so that the output voltage of DC-DC boost converter is finally stable at Vdc1, now
Vdc1=Vdc_ref1 is 375V.
When peak value three-phase input voltage being detected is less than Vdc again, again using Vdc_ref0 as control
Giving of device processed, the control signal of controller changes so that the output voltage of DC-DC boost converter
Final stable at Vdc, now Vdc=Vdc_ref0 is 360V.
When detecting in the range of the peak value of any one phase input voltage is at 1.042Vdc to 1.083Vdc,
Using Vdc_ref2 giving as controller, the control signal of controller changes so that DC-DC liter
The output voltage of buckling parallel operation is finally stable at Vdc2, and now Vdc2=Vdc_ref2 is 390V.
When detecting in the range of the peak value of three-phase input voltage is again at Vdc to 1.042Vdc, again will
Vdc_ref1 giving as controller, the control signal of controller changes so that DC-DC rises buckling
The output voltage of parallel operation is finally stable at Vdc1, and now Vdc1=Vdc_ref1 is 375V.
Illustrate:
When arbitrary phase input voltage is in 255-265V scope, busbar voltage is lifted to 375V；When arbitrary
Busbar voltage, when 265-275V scope, is lifted to 390V by phase input voltage.
The above is the preferred embodiment of the present invention, it is noted that for the common skill of the art
For art personnel, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, this
A little improvements and modifications are also considered as protection scope of the present invention.
Claims (9)
1. a UPS three-phase input equal current-sharing controller, it is characterised in that including: input voltage diagnosis apparatus,
For the input voltage of UPS is detected in real time, judged, and selection control suitably gives voltage；Actuator, for regulating the output voltage of booster converter
；And PWM generator, for the output voltage of actuator is converted to PWM signal；
This selection control suitably gives voltage: when the peak value any one phase input voltage being detected is less than the output voltage Vdc of booster converter,
Using Vdc_ref0 as the given voltage of actuator；
When detecting that the peak value of any one phase input voltage is in the range of the output voltage Vdc to K1*Vdc of booster converter, using given as actuator of Vdc_ref1, the control signal of controller changes,
The output voltage making booster converter is finally stable at Vdc1, Vdc1=Vdc_ref1；
When peak value three-phase input voltage being detected is less than Vdc, again will
Vdc_ref0 giving as actuator, the control signal of controller changes so that the output voltage of booster converter is finally stable at Vdc, Vdc=Vdc_ref0；
When the peak value of any one phase input voltage being detected at K1*Vdc extremely
Time in the range of K2*Vdc, using Vdc_ref2 giving as actuator, the control signal of controller changes so that the output voltage of booster converter is finally stable at Vdc2, Vdc2=Vdc_ref2；
When the peak value of three-phase input voltage being detected at Vdc extremely
Time in the range of K1*Vdc, again using Vdc_ref1 giving as actuator, the control signal of controller changes,
The output voltage making booster converter is finally stable at Vdc1, Vdc1=Vdc_ref1.
2. a UPS device, it is characterised in that: there is the three-phase input equal current-sharing controller described in claim 1.
3. a UPS three-phase input current-sharing control method, wherein UPS includes commutator, booster converter and controller, it is characterized in that: described controller includes input voltage diagnosis apparatus, for the input voltage of UPS is detected in real time, judged, and selection control suitably gives voltage；Actuator, for regulating the output voltage of booster converter；And PWM generator, for the output voltage of actuator is converted to PWM signal；
Input voltage is detected by input voltage diagnosis apparatus in real time, when input voltage diagnosis apparatus detects that arbitrary phase input voltage exceedes certain limit, select the most given voltage to booster converter, make input voltage peak value within the output voltage range of booster converter
Avoid input voltage to fill dc-link capacitance to cause inputting not current-sharing；
This selection control suitably gives voltage: when the peak value any one phase input voltage being detected is less than the output voltage Vdc of booster converter,
Using Vdc_ref0 as the given voltage of actuator；
When detecting that the peak value of any one phase input voltage is in the range of the output voltage Vdc to K1*Vdc of booster converter, using given as actuator of Vdc_ref1, the control signal of controller changes,
Make the output voltage of booster converter
Final stable at Vdc1, Vdc1=Vdc_ref1；
When peak value three-phase input voltage being detected is less than Vdc, again will
Vdc_ref0 giving as actuator, the control signal of controller changes so that the output voltage of booster converter is finally stable at Vdc, Vdc=Vdc_ref0；
When the peak value of any one phase input voltage being detected at K1*Vdc extremely
Time in the range of K2*Vdc, using Vdc_ref2 giving as actuator, the control signal of controller changes so that the output voltage of booster converter is finally stable at Vdc2, Vdc2=Vdc_ref2；
When the peak value of three-phase input voltage being detected at Vdc extremely
Time in the range of K1*Vdc, again using Vdc_ref1 giving as actuator, the control signal of controller changes,
The output voltage making booster converter is finally stable at Vdc1, Vdc1=Vdc_ref1.
UPS three-phase the most according to claim 3 input current-sharing control method,
It is characterized in that, described Vdc value is 360V when UPS nominal operation.
5. input current-sharing control method according to the UPS three-phase described in claim 3,
It is characterized in that, described Vdc_ref0 value is 360V.
UPS three-phase the most according to claim 3 input current-sharing control method,
It is characterized in that, described Vdc_ref1 value is 375V.
UPS three-phase the most according to claim 3 input current-sharing control method,
It is characterized in that, described Vdc_ref2 value is 390V.
8. input current-sharing control method according to the UPS three-phase described in claim 3,
It is characterized in that, described K1 value is 1.042.
UPS three-phase the most according to claim 3 input current-sharing control method,
It is characterized in that, described K2 value is 1.083.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410605954.5A CN104333023B (en) | 2014-10-30 | UPS three-phase input equal current-sharing controller and the current-sharing control method of UPS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410605954.5A CN104333023B (en) | 2014-10-30 | UPS three-phase input equal current-sharing controller and the current-sharing control method of UPS |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104333023A CN104333023A (en) | 2015-02-04 |
| CN104333023B true CN104333023B (en) | 2017-01-04 |
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