CN106849331B - Uninterruptible power system and its power regulation control circuit - Google Patents
Uninterruptible power system and its power regulation control circuit Download PDFInfo
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- CN106849331B CN106849331B CN201710093884.3A CN201710093884A CN106849331B CN 106849331 B CN106849331 B CN 106849331B CN 201710093884 A CN201710093884 A CN 201710093884A CN 106849331 B CN106849331 B CN 106849331B
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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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
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Abstract
A kind of power regulation control circuit of uninterruptible power system, it include: frequency detection circuit, power-sensing circuit, mode switching circuit, and power conditioning circuitry, it is connect respectively with the frequency detection circuit, the power-sensing circuit and the mode switching circuit；The power conditioning circuitry is also connect with the output end of the uninterruptible power system, to receive its output voltage value of feedback；The power conditioning circuitry is used to determine power regulating signals according to output power value of feedback, first frequency value of feedback, output voltage value of feedback, frequency given value and output voltage given value.There is the power regulation control circuit of above-mentioned uninterruptible power system preferable adjusting real-time to meet the power demands of load so as to ensure the output power and workload demand power match of uninterruptible power system.
Description
Technical field
The present invention relates to power supply technical fields, more particularly to a kind of uninterruptible power system and its power regulation control
Circuit processed.
Background technique
With the rapid growth of data center power sources load in recent years, energy efficiency indexes require higher and higher.For being applied to
The uninterruptible power system (UPS) of high-density data center will not only power for information technoloy equipment, also guarantee the sky of information technoloy equipment operation
The power supply of the ancillary equipments such as tune, power supply requirement can continue to increase.Since the densification of data center is a kind of inevitable trend, because
This proposes completely new requirement to for its UPS for providing electric power safeguard.Traditional UPS is when load changes, output power
It can not be adjusted, be mismatched so as to cause output power and workload demand power in time, the electricity consumption for being unable to satisfy user needs
It asks.
Summary of the invention
Based on this, it is necessary to provide a kind of power regulation control of preferable uninterruptible power system of power regulation real-time
Circuit also provides a kind of uninterruptible power system.
A kind of power regulation control circuit of uninterruptible power system, comprising: frequency detection circuit, for it is described not between
The frequency of power-off source system output voltage carries out detection and exports as first frequency value of feedback；The frequency detection circuit is also used
Detection is carried out in the frequency to network voltage and is exported as second frequency value of feedback；Power-sensing circuit, for it is described not
The output power of uninterruptible power system carries out detection and exports as output power value of feedback；Mode switching circuit, including first
Grid-connected contact, the first off-network contact, the second grid-connected contact and the second off-network contact；The first grid-connected contact and the frequency are examined
Slowdown monitoring circuit connection, to receive the second frequency value of feedback；First off-network contact is for receiving default given frequency value；Institute
The second grid-connected contact is stated for receiving network voltage value of feedback；Second off-network contact is for receiving default given voltage value；
The mode switching circuit be used under grid-connect mode using the input of the described first grid-connected contact as frequency given value, will described in
The input of second grid-connected contact is exported as output voltage given value, and by the defeated of first off-network contact under off-network mode
Enter and is exported as frequency given value, using the input of second off-network contact as output voltage given value；And power regulation
Circuit is connect with the frequency detection circuit, the power-sensing circuit and the mode switching circuit respectively；The power tune
Economize on electricity road is also connect with the output end of the uninterruptible power system, to receive its output voltage value of feedback；The power regulation
Circuit is used for according to the output power value of feedback, the first frequency value of feedback, the output voltage value of feedback, the frequency
Given value and the output voltage given value determine power regulating signals.
The power regulation control circuit of above-mentioned uninterruptible power system, mode switching circuit can be according to uninterruptible power supply systems
The operating mode of system switches over the output voltage given value and frequency given value of output, so that power conditioning circuitry can
According to the frequency of uninterruptible power system output voltage (namely first frequency value of feedback), output voltage value of feedback, output work
Rate value of feedback, frequency given value and output voltage given value determine power regulating signals, have preferable real-time, so as to
The output power and workload demand power match for enough ensuring uninterruptible power system, meet the power demands of load.
The frequency detection circuit includes first frequency detection unit and second frequency detection in one of the embodiments,
Unit；The first frequency detection unit is used to carry out the frequency of the uninterruptible power system output voltage detection and conduct
The output of first frequency value of feedback；The second frequency detection unit is used to carry out the frequency of network voltage detection and as second
The output of frequency feedback value.
The first frequency detection unit includes the first phaselocked loop and the first converter unit in one of the embodiments,；
First phaselocked loop is connect with the output end of the uninterruptible power system and first converter unit respectively；Described first
Phaselocked loop is used to detect the phase of the uninterruptible power system output voltage；First converter unit is used for according to input
Phse conversion obtains the first frequency value of feedback.
The second frequency detection unit includes the second phaselocked loop and the second converter unit in one of the embodiments,；
Second phaselocked loop is connect with power grid and second converter unit respectively；Second phaselocked loop is for detecting network voltage
Phase；Second converter unit is used to obtain the second frequency value of feedback according to the phse conversion of input.
The mode switching circuit includes the first switching switch, the second switching switch and control in one of the embodiments,
Unit processed；The fixing end of the first switching switch is connect with the power conditioning circuitry；The first of the first switching switch
Contact is the described first grid-connected contact；Second contact of the first switching switch is first off-network contact；Described second
The fixing end of switching switch is connect with the power conditioning circuitry；First contact of the second switching switch is described second simultaneously
Net contact；Second contact of the second switching switch is second off-network contact；Described control unit is used for according to
The operating mode of uninterruptible power system switches over control to the first switching switch and the second switching switch.
The power-sensing circuit is active for exporting to the uninterruptible power system in one of the embodiments,
Power and reactive power detect and active power of output value of feedback and reactive power value of feedback；The power conditioning circuitry packet
Include active adjusting unit and Reactive-power control unit；The active first input end for adjusting unit and the frequency detection circuit connect
It connects, to receive the first frequency value of feedback；What active second input terminal for adjusting unit and first switching switched
Fixing end connection, to receive the frequency given value；It is described it is active adjust unit third input terminal also with the power detection
Circuit connection, to receive the active power feedback value；The active adjusting unit be used for according to the first frequency value of feedback,
The frequency given value and the active power feedback value determine active power regulation signal；The first of the Reactive-power control unit
Input terminal is connect with the output end of the uninterruptible power system, to receive the output voltage value of feedback；The Reactive-power control
Second input terminal of unit is connect with the fixing end of the second switching switch, to receive the output voltage given value；It is described
The third input terminal of Reactive-power control unit is also connect with the power-sensing circuit, to receive the reactive power value of feedback；Institute
Reactive-power control unit is stated for feeding back according to the output voltage value of feedback, the output voltage given value and the reactive power
It is worth and determines reactive power adjustment signal.
The active adjusting unit includes sequentially connected frequency loop and active power ring in one of the embodiments,；
The frequency loop includes sequentially connected first adder and frequency ring controller；The first input end of the first adder is made
For the active first input end for adjusting unit；Second input terminal of the first adder is as the active adjusting unit
The second input terminal；The first adder is used to seek the difference between the frequency given value and the first frequency value of feedback
It is worth and exports to the frequency ring controller；The frequency ring controller is used to carry out the difference closed-loop control generation active
Power given value；The active power ring includes sequentially connected second adder and active ring controller；Second addition
The first input end of device is as the active third input terminal for adjusting unit；Second input terminal of the second adder and institute
State the connection of frequency ring controller；The second adder is for seeking the active power given value and the active power feedback
Difference and output between value is to the active ring controller；The active ring controller is used to carry out closed loop to the difference of input
Control generates active power regulation signal.
The Reactive-power control unit includes sequentially connected Voltage loop and reactive power ring in one of the embodiments,；
The Voltage loop includes sequentially connected third adder and voltage ring controller；The first input end of the third adder is made
For the first input end of the Reactive-power control unit；Second input terminal of the third adder is as the Reactive-power control unit
The second input terminal；The third adder is for seeking between the output voltage given value and the output voltage value of feedback
Difference and export to the voltage ring controller；The voltage ring controller is used to carry out closed-loop control to the difference of input raw
At reactive power given value；The reactive power ring includes sequentially connected 4th adder and idle ring controller；Described
Third input terminal of the first input end of four adders as the Reactive-power control unit；Second input of the 4th adder
End is connect with the voltage ring controller；4th adder is for seeking the reactive power given value and the idle function
Difference and output between rate value of feedback is to the idle ring controller；The idle ring controller be used for the difference of input into
Row closed-loop control generates reactive power adjustment signal.
It in one of the embodiments, further include control signal generating circuit and driving circuit；The control signal generates
Circuit is connect with the power conditioning circuitry；Output end of the control signal generating circuit also with the uninterruptible power system
Connection exports current feedback values to receive it；The control signal generating circuit is used for according to the power regulating signals and institute
It states output current feedback values and generates control signal；The driving circuit is connect with the control signal generating circuit, is used for institute
It states after control signal is converted to driving signal and exports to the uninterruptible power system.
A kind of uninterruptible power system, comprising: energy storage device；Current transformer is connected to the energy storage device and commonly connected
Between point；And the power regulation control circuit as described in aforementioned any embodiment；The power regulation control circuit is for defeated
The power regulating signals are controlled with the output to the current transformer to the current transformer out, thus realize to it is described not between
Power off the control of power system output power.
Detailed description of the invention
Fig. 1 is the circuit block diagram of the uninterruptible power system in an embodiment；
Fig. 2 is the circuit diagram of the uninterruptible power system in an embodiment.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Fig. 1 is the circuit block diagram of the uninterruptible power system (hereinafter referred to as UPS) in an embodiment.The UPS includes energy storage
Device 110, current transformer 120 and power regulation control circuit 200.
Energy storage device 110 is for storing electric energy and discharging electric energy outward.Energy storage device 110 connect with current transformer 120 and is followed by
Enter points of common connection PCC (hereinafter referred to as PCC point), and is connect by PCC point with power grid 10 and load 20.Current transformer 120 is used for
The output of uninterruptible power system is controlled, to meet the power demands of load.
Power regulation control circuit 200 includes frequency detection circuit 210, power-sensing circuit 220, mode switching circuit
230 and power conditioning circuitry 240.Wherein, frequency detection circuit 210 respectively with the output end of current transformer 120, power grid (namely PCC
The alternating current side of point) connection.Frequency detection circuit 210 is for detecting the frequency of UPS (namely current transformer 120) output voltage
And f is fed back as first frequencyinvOutput.Frequency detection circuit 210 is also used to carry out the frequency of network voltage detection and conduct
Second frequency value of feedback fgridOutput.
Power-sensing circuit 220 is connect with the output end of current transformer 120, is carried out for the output power to current transformer 120
Detect simultaneously output power value of feedback.Power-sensing circuit 220 can determine output work according to the output electric current and output voltage of UPS
Rate.
Mode switching circuit 230 includes the first grid-connected contact S1, the first off-network contact S2, the second grid-connected contact S3 and second
Off-network contact S4.Wherein, the first grid-connected contact S1 is connect with frequency detection circuit 210, to receive second frequency value of feedback fgrid。
First off-network contact S2 is then used to receive default given frequency value fREF.In the present embodiment, given frequency value f is presetREFFor
50Hz namely f50Hz.It in other examples, can also be according to load power demand setting.Second grid-connected contact S3 and electricity
Net connection, to receive network voltage value of feedback Ugd.Second off-network contact S4 is for receiving default given voltage value UREF.In this reality
It applies in example, presets given voltage value UREFFor 220V namely U220V.In other examples, given voltage value U is presetREFIt can
To be set as needed.Mode switching circuit 230 is used for when UPS is in grid-connect mode, by the first grid-connected contact S1's
Input is used as frequency given value, and using the input of the second grid-connected contact S3 as output after output voltage given value to power regulation
Circuit 240.Mode switching circuit 230 gives the input of the first off-network contact S2 as frequency when UPS is in off-network mode
Value, and using the input of the second off-network contact S4 as output after output voltage given value to power conditioning circuitry 240.
Power conditioning circuitry 240 respectively with frequency detection circuit 210, power-sensing circuit 220 and mode switching circuit 230
Connection.Power conditioning circuitry 240 is also connect with the output end of current transformer 120, to receive its output voltage value of feedback Ud.Power tune
Road 240 economize on electricity for according to output power value of feedback, first frequency value of feedback finv, output voltage value of feedback Ud, frequency given value
Power regulating signals are determined with output voltage given value.Specifically, when UPS is in grid-connect mode, mode switching circuit 230 will
The input of first grid-connected contact S1 is as frequency given value, and using the input of the second grid-connected contact S3 as output voltage given value
After export to power conditioning circuitry 240.That is, frequency given value is second frequency value of feedback f at this timegridNamely network voltage
Frequency feedback value；Output voltage given value is network voltage value of feedback Ugd.Determine that power regulation is believed using frequency and voltage
Number, it can be ensured that power regulating signals can follow the variation of load in time and change, so that power regulation has
Preferable real-time.
In one embodiment, power regulation control circuit 200 further includes control signal generating circuit 250 and driving circuit
260.Control signal generating circuit 250 is connect with power conditioning circuitry 240.Control signal generating circuit 250 also with current transformer 120
Output end connection, with receive its export current feedback values.Control the output end and driving circuit 260 of signal generating circuit 250
Control terminal connection.Signal generating circuit 250 is controlled to be used for according to the output current feedback values and power regulating signals life
At output after control signal to driving circuit 260.Driving circuit 260 is according to defeated after the corresponding driving signal of control signal generation
Out to current transformer 120, to control the work in current transformer 120, and then realize to the output power of current transformer 120
Control, so that UPS output power can satisfy loading demand.
The power regulation control circuit of above-mentioned UPS, mode switching circuit 230 can be according to the operating modes of UPS to output
Output voltage given value and frequency given value switch over so that power conditioning circuitry 240 can according to UPS export electricity
Frequency (namely first frequency value of feedback), output voltage value of feedback, output power value of feedback, frequency given value and the output electricity of pressure
It presses given value to determine power regulating signals, there is preferable real-time, so as to ensure that output power and the load of UPS need
Power match is sought, the power demands of load are met.
Fig. 2 is the circuit diagram of the UPS in an embodiment.In the present embodiment, frequency detection circuit 210 includes first
Frequency detecting unit 212 and second frequency detection unit 214.First frequency detection unit 212 is used for the frequency to UPS output voltage
Rate carries out detection and as first frequency value of feedback finvOutput.Wherein, first frequency detection unit 212 includes the first phaselocked loop
2122 and first converter unit 2124.The input terminal of first phaselocked loop 2122 is connect with the output end of current transformer 120, the first locking phase
The output end of ring 2122 is connect with the input terminal of the first converter unit 2124.First phaselocked loop 2122 is for detecting current transformer 120
The phase theta of output voltageinv.First converter unit 2124 is used for according to the phase thetainvTransformation obtains corresponding first frequency feedback
Value finv.Second frequency detection unit 214 is used to carry out the frequency of network voltage detection and as second frequency value of feedback fgrid
Output.Second frequency detection unit 214 includes the second phaselocked loop 2142 and the second converter unit 2144.Wherein, the second phaselocked loop
2142 input terminal is connected to the grid side of PCC point, namely connect with power grid.The output end of second phaselocked loop 2142 and second becomes
Change the input terminal connection of unit 2144.The working principle of second frequency detection unit 214 and the work of first frequency detection unit 212
It is identical to make principle.
In the present embodiment, power-sensing circuit 220 is for detecting the UPS active power exported and reactive power
And active power of output value of feedback P and reactive power value of feedback Q.Power-sensing circuit 220 includes the first three-phase static coordinate system
It is rotated to two-phase rotating coordinate system conversion module (the first abc/dq conversion module) the 222, second three-phase static coordinate system to two-phase
Coordinate system transformation module (the 2nd abc/dq conversion module) 224 and power calculation unit 226.Wherein, the first abc/dq converts mould
The input terminal of block 222 is connect with the output end of current transformer 120, for receiving the three-phase current (i of its outputA、iB、iC,).First
Abc/dq conversion module 222 is used for the three-phase current (i that will be receivedA、iB、iC) be converted to d axis under two-phase rotating coordinate system
Electric current IdWith q shaft current IqIt is exported respectively by d axis output end and q axis output end afterwards.2nd abc/dq conversion module 224 it is defeated
Enter end to connect with the output end of current transformer 120, for receiving the three-phase voltage (u of its outputA、uB、uC) and by the three-phase voltage
(uA、uB、uC) be converted to d shaft voltage U under two-phase rotating coordinate systemdWith q shaft voltage UqIt is exported afterwards by d axis output end and q axis
End exports respectively.Power calculation unit 226 respectively with the first abc/dq conversion module 222 and the 2nd abc/dq conversion module 224
Connection.The d axis that power calculation unit 226 is exported according to the first abc/dq conversion module 222 and the 2nd abc/dq conversion module 224
Voltage UdWith d shaft current IdActive power feedback value P is calculated.Power calculation unit 226 converts mould also according to the first abc/dq
The q shaft voltage U of block 222 and the output of the 2nd abc/dq conversion module 224qWith q shaft current IqReactive power value of feedback Q is calculated.
Referring to fig. 2, mode switching circuit 230 includes that the first switching switch 232, second switches switch 234 and control unit
(not shown).Wherein, the fixing end of the first switching switch 232 is connect with power conditioning circuitry 240.First switching switch 232
The first contact 1 as the first grid-connected contact S1 of mode switching circuit 230 namely first switching switch 232 the first contact 1
It is connect with the output end of second frequency detection unit 214, to receive the second frequency value of feedback f of its outputgird(namely power grid electricity
The frequency feedback value of pressure).First off-network contact of second contact 2 of the second switching switch 232 as mode switching circuit 230
S2.That is, the second contact 2 of the first switching switch 232 is for receiving default given frequency value f50Hz.Second switching switch 234
Fixing end connect with power conditioning circuitry 240.First contact 1 of the second switching switch 234 is as mode switching circuit 230
Second grid-connected contact S3, namely connect with power grid to receive its network voltage value of feedback Ugd.Second touching of the second switching switch 234
Point 2 as the second off-network contact S4 of mode switching circuit 230 namely its be used to receive default given voltage value U220V.Control
Unit is used to switch over control to the first switching switch 232 and the second switching switch 234 according to the operating mode of UPS.Specifically
Ground, control unit under grid-connect mode, connect its first contact 1 and control the second switching switch by control the first switching switch 232
234 connect its first contact 1, thus by second frequency value of feedback fgridAs frequency given value and by network voltage value of feedback Ugd
As output voltage given value.Control unit then controls the first switching switch 232 under off-network mode and connects its second contact 2 simultaneously
Control the second switching switch 234 connects its second contact 2, thus by default given frequency value f50HzAs frequency given value and incite somebody to action
Default given voltage value U220VIt is exported as output voltage given value.
Power conditioning circuitry 240 includes active adjusting unit 242 and Reactive-power control unit 244.Wherein, active adjusting unit
242 first input end with the output end of the first frequency detection unit 212 of frequency detection circuit 210 for connecting, to receive
First frequency value of feedback finv.Active the second input terminal for adjusting unit 242 is connect with the fixing end of the first switching switch 232, with
Receive the frequency given value that the first switching switch 232 exports.The active third input terminal for adjusting unit 242 is also electric with power detection
The output end of power calculation unit 226 in road 220 connects, to receive active power feedback value P.Active adjusting unit 242 is used
According to first frequency value of feedback finv, frequency given value and active power feedback value P determine active power regulation signal Id *。
In one embodiment, active adjusting unit 242 includes sequentially connected frequency loop 310 and active power ring 320.Frequently
Rate ring 310 includes sequentially connected first adder 312 and frequency ring controller 314.The first input end of first adder 312
(-) receives first frequency value of feedback f as the active first input end for adjusting unit 242inv.The second of first adder 312
Input terminal (+) receives frequency given value as active the second input terminal for adjusting unit 242.First adder 312 is for seeking
Frequency given value and first frequency value of feedback finvBetween difference and export to frequency ring controller 314.Frequency ring controller
The difference of 314 pairs of inputs carries out closed-loop control and generates active power given value P*.Frequency ring controller 314 can control for PI
Device.
Active power ring 320 includes sequentially connected second adder 322 and active ring controller 324.Second adder
322 first input end (-) receives active power feedback value P as the active third input terminal for adjusting unit 242.Second adds
Second input terminal (+) of musical instruments used in a Buddhist or Taoist mass 322 is connect with the output end of frequency ring controller 314, and the active power for receiving its output is given
Value P*.Second adder 322 is for seeking active power given value P*Difference between active power feedback value P and export to
Active ring controller 324.Active ring controller 324 is used to carry out closed-loop control to the difference to generate active power regulation signal
Id *.Active ring controller 324 can be PI controller.
The first input end of Reactive-power control circuit 244 and the output end of UPS connect, to receive its output voltage value of feedback
Ud.Second input terminal of Reactive-power control unit 244 is connect with the fixing end of the second switching switch 234, is opened with receiving the second switching
Close the output voltage given value of 234 outputs.The third input terminal of Reactive-power control unit 244 is also and in power-sensing circuit 220
The output end of power calculation unit 226 connects, to receive reactive power value of feedback Q.Reactive-power control unit 244 is used for according to output
Voltage feedback value Ud, output voltage given value and reactive power value of feedback Q determine reactive power adjustment signal Iq *。
In one embodiment, Reactive-power control unit 244 includes sequentially connected Voltage loop 330 and inactivity ring 340.Voltage
Ring 330 includes sequentially connected third adder 332 and voltage ring controller 334.The first input end of third adder 332
The first input end of (-) as Reactive-power control unit 244 receives output voltage value of feedback Ud.The second of third adder 332 is defeated
Enter second input terminal of the end (+) as Reactive-power control unit 244, receives output voltage given value.Third adder 332 is for asking
Take output voltage given value and output voltage value of feedback UdDifference and export to voltage ring controller 334.Voltage ring controller
The difference of 334 pairs of inputs carries out closed-loop control and generates reactive power given value Q*.Voltage ring controller 334 can control for PI
Device.
Reactive power ring 340 includes sequentially connected 4th adder 342 and idle ring controller 344.4th adder
Third input terminal of 342 first input end (-) as Reactive-power control unit 244 receives reactive power value of feedback Q.4th adds
Second input terminal (+) of musical instruments used in a Buddhist or Taoist mass 342 is connect with the output end of voltage ring controller 334, and the reactive power for receiving its output is given
Value Q*.4th adder 342 is for seeking reactive power given value Q*Difference between reactive power value of feedback Q and export to
Idle ring controller 344.Idle ring controller 344 is used to carry out closed-loop control to the difference to generate reactive power adjustment signal
Iq *.Idle ring controller 344 can be PI controller.
Controlling signal generating circuit 250 includes active electric current loop 252 and reactive current ring 254.Wherein, watt current ring
252 include adder 2522 and electric current loop d axis controller 2524.The first input end (-) of adder 2522 is used as watt current
The first input end of ring 252, to receive d shaft current Id.The second input terminal (+) of adder 2522 is used as watt current ring 252
The second input terminal connect with the output end of active ring controller 244, to receive active power regulation signal Id *.Adder 2522
For obtaining active power regulation signal Id *With d shaft current IdBetween difference and export to electric current loop d axis controller 2524.Electricity
Stream ring d axis controller 2524 is used to carry out closed-loop control to the difference to generate d axis control signal udo.Reactive current ring 254
Structure and working principle it is similar with watt current ring 252, not repeat introduce.In one embodiment, control signal generates
Circuit 250 further includes two-phase rotating coordinate system to three-phase static coordinate system conversion module (dq/abc conversion module) 256.dq/abc
The d axis that conversion module 256 is used to export on watt current ring 252 and reactive current ring 254 controls signal udoSignal is controlled with q axis
uqoBe converted to three phase control signal (Varef2、Vbref2、Vcref2、)。
The input terminal of driving circuit 260 is connect with the output end of control signal generating circuit 250.Driving circuit 260 it is defeated
Outlet is connect with current transformer 120.Driving circuit 260 is used for according to the three phase control signal (V receivedaref2、Vbref2、Vcref2、)
Output is adjusted output power with controlling current transformer 120 to current transformer 120 after generating corresponding driving signal, meets negative
Lotus power demand.
The course of work of power regulation control circuit under different mode is described further separately below:
Under grid-connect mode, the first switching switch 232 connects the first contact 1, thus by second frequency value of feedback fgridMake
For frequency given value.Under grid-connect mode, first frequency value of feedback finv(namely frequency feedback value of the output voltage of UPS) connects
Nearly second frequency value of feedback fgrid(namely frequency feedback value of network voltage), therefore pass through the effect of frequency ring controller 314, frequency
The output valve very little of rate ring 310, active power given value P*Very little, the not active power of output of current transformer 120, energy consumption very little.?
Under the mode, current transformer 120 according to circumstances can carry out idle and harmonic compensation to power grid, improve the power quality of PCC point.Together
When, the second switching switch 234 connects its first contact 1, thus by network voltage value of feedback UgdAs output voltage given value.This
When, the output voltage value of feedback U of UPSdEqual to network voltage value of feedback Ugd, the output of Voltage loop 330 is zero namely reactive power
Given value Q*It is zero, so that the not output reactive power of current transformer 120.
Under off-network mode, the first switching switch 232 connects the second contact, thus by default given frequency value f50HzAs
Frequency given value.That is, it is 50Hz that off-network mode lower frequency given value is constant.In load variations, the frequency of UPS output voltage
Namely first frequency value of feedback finvIt can change accordingly.For example, when load is uprushed, the wattful power of the output of current transformer 120
Rate will appear vacancy, lead to the frequency feedback value namely first frequency value of feedback f of current transformer 120invBecome smaller.Therefore, frequency loop
310 frequency given value and first frequency value of feedback finvBetween error become larger, therefore by the effect of frequency ring controller 314,
Active power given value P*Become larger, control current transformer 120 increases active power output, finally makes having for the output of current transformer 120
Function power is equal with workload demand power, meets load power demand.Conversely, when load dump, first frequency value of feedback finv
Become larger, passes through the effect of frequency ring controller 314, active power given value P*Become smaller, control current transformer 120 reduces active power
Output, meets load power demand.In short, the variation of load consumption active power is embodied directly in the change of the frequency of output voltage
In change, which passes through the adjusting of frequency ring controller 314 compared with fixed 50Hz given value, final to control
The active power of current transformer 120 meets load power demands.
Meanwhile under off-network mode, the second switching switch 234 connects its second contact, thus by default given voltage value
U220VAs output voltage given value.That is, constant output voltage given value is 220V under off-network mode.In this mode, lead to
Cross the demand of the voltage value de-regulation reactive load changed power of 120 reality output of current transformer.Specifically, in the idle function of load
When rate increases, the reactive power that current transformer 120 exports equally will appear vacancy, so as to cause the output voltage of current transformer 120
Amplitude decline.The output voltage given value U of Voltage loop 330220VWith output voltage value of feedback UdBetween error become larger, therefore pass through
The adjustment effect of voltage ring controller 334, reactive power given value Q*Becoming larger, control current transformer 120 increases reactive power output,
The reactive power for exporting current transformer 120 is equal with workload demand power, and then quickly current transformer 120 is maintained to export electricity
The stabilization of pressure amplitude value, the demand of the high power quality power supply of full load, on the contrary situation.
By above-mentioned power regulation control circuit, quickly the output of current transformer 120 can be adjusted in load variations
Section has preferable real-time, can satisfy load power demand.Above-mentioned power regulation control circuit is also applied for more UPS
In combining system.When load is active and reactive power changes in demand, the frequency of more UPS output synchronous can all occur with amplitude
Variation, therefore each UPS can pass through the control action of frequency adjusting control circuit 200, quick average mark distribution transforming stream device 120
The active power and reactive power size of output finally make the active and reactive power and workload demand of more current transformer output
Power is equal, and then quickly maintains the stabilization of current transformer output voltage amplitude, the demand of the high power quality power supply of full load.This
Kind of power regulating method compared to traditional ups power system by interconnection line and machine, real-time, power-sharing and
In terms of reliability, there is extraordinary effect.
Above-mentioned UPS can be realized grid-connect mode to the seamless switching of off-network mode.When current transformer 120 is in grid-connect mode,
Frequency loop 310 and Voltage loop 330 do not work substantially, and current transformer 120 is according to active power ring 320, reactive power ring 330, active
Electric current loop 132 and reactive current ring 134 work, i.e. the work of PQ (active/idle) control mode.And in this mode, unsteady flow
Device 120 can carry out idle and harmonic compensation to power network current according to the actual situation, improve the power quality of PCC point alternating current.?
City's electrical anomaly, when current transformer 120 switches seamlessly to off-network mode from grid-connect mode, current transformer 120 is according to frequency loop 310, voltage
Ring 330, active power ring 320, reactive power ring 330, watt current ring 132 and reactive current ring 134 work, i.e. VF (constant pressure/
Constant frequency) control mode work, reached and then the control to current transformer output voltage frequency and amplitude to current transformer output
The adjusting of active power and reactive power, real-time response load power changes demand, and then quickly current transformer 120 is maintained to export electricity
The stabilization of pressure amplitude value, the demand of the high power quality power supply of full load.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of power regulation control circuit of uninterruptible power system characterized by comprising
Frequency detection circuit carries out detection for the frequency to the uninterruptible power system output voltage and as first frequency
Value of feedback output；The frequency detection circuit is also used to carry out the frequency of network voltage detection and as second frequency value of feedback
Output；
Power-sensing circuit carries out detection for the output power to the uninterruptible power system and feeds back as output power
Value output；
Mode switching circuit, including the first grid-connected contact, the first off-network contact, the second grid-connected contact and the second off-network contact；Institute
It states the first grid-connected contact to connect with the frequency detection circuit, to receive the second frequency value of feedback；The first off-network touching
Point is for receiving default given frequency value；The second grid-connected contact is for receiving network voltage value of feedback, the network voltage
Value of feedback is the voltage feedback value of the power grid；Second off-network contact is for receiving default given voltage value；The mode
Switching circuit is for grid-connected using the input of the described first grid-connected contact as frequency given value, by described second under grid-connect mode
The input of contact is exported as output voltage given value, and using the input of first off-network contact as frequency under off-network mode
Rate given value is exported the input of second off-network contact as output voltage given value；And
Power conditioning circuitry connects with the frequency detection circuit, the power-sensing circuit and the mode switching circuit respectively
It connects；The power conditioning circuitry is also connect with the output end of the uninterruptible power system, to receive its output voltage value of feedback；
The power conditioning circuitry is used for anti-according to the output power value of feedback, the first frequency value of feedback, the output voltage
Feedback value, the frequency given value and the output voltage given value determine power regulating signals.
2. power regulation control circuit according to claim 1, which is characterized in that the frequency detection circuit includes first
Frequency detecting unit and second frequency detection unit；The first frequency detection unit is for defeated to the uninterruptible power system
The frequency of voltage carries out detection and exports as first frequency value of feedback out；The second frequency detection unit is used for power grid electricity
The frequency of pressure carries out detection and exports as second frequency value of feedback.
3. power regulation control circuit according to claim 2, which is characterized in that the first frequency detection unit includes
First phaselocked loop and the first converter unit；First phaselocked loop respectively with the output end of the uninterruptible power system and described
The connection of first converter unit；First phaselocked loop is used to detect the phase of the uninterruptible power system output voltage；It is described
First converter unit is used to obtain the first frequency value of feedback according to the phse conversion of input.
4. power regulation control circuit according to claim 2, which is characterized in that the second frequency detection unit includes
Second phaselocked loop and the second converter unit；Second phaselocked loop is connect with power grid and second converter unit respectively；It is described
Second phaselocked loop is used to detect the phase of network voltage；Second converter unit according to the phse conversion of input for obtaining
To the second frequency value of feedback.
5. power regulation control circuit according to claim 1, which is characterized in that the mode switching circuit includes first
Switching switch, the second switching switch and control unit；
The fixing end of the first switching switch is connect with the power conditioning circuitry；First contact of the first switching switch
For the described first grid-connected contact；Second contact of the first switching switch is first off-network contact；
The fixing end of the second switching switch is connect with the power conditioning circuitry；First contact of the second switching switch
For the described second grid-connected contact；Second contact of the second switching switch is second off-network contact；
Described control unit is used for according to the operating mode of the uninterruptible power system to the first switching switch and described
Second switching switch switches over control.
6. power regulation control circuit according to claim 5, which is characterized in that the power-sensing circuit is used for institute
It states the active power of uninterruptible power system output and reactive power detect and active power of output value of feedback and idle function
Rate value of feedback；
The power conditioning circuitry includes active adjusting unit and Reactive-power control unit；Active first input for adjusting unit
End is connect with the frequency detection circuit, to receive the first frequency value of feedback；Active second input for adjusting unit
It holds and is connect with the fixing end of the first switching switch, to receive the frequency given value；The active third for adjusting unit
Input terminal is also connect with the power-sensing circuit, to receive the active power feedback value；The active adjusting unit is used for
Determine that active power regulation is believed according to the first frequency value of feedback, the frequency given value and the active power feedback value
Number；
The first input end of the Reactive-power control unit is connect with the output end of the uninterruptible power system, described defeated to receive
Voltage feedback value out；Second input terminal of the Reactive-power control unit is connect with the fixing end of the second switching switch, to connect
Receive the output voltage given value；The third input terminal of the Reactive-power control unit is also connect with the power-sensing circuit, with
Receive the reactive power value of feedback；The Reactive-power control unit is used for according to the output voltage value of feedback, output electricity
Pressure given value and the reactive power value of feedback determine reactive power adjustment signal.
7. power regulation control circuit according to claim 6, which is characterized in that the active adjusting unit includes successively
The frequency loop and active power ring of connection；
The frequency loop includes sequentially connected first adder and frequency ring controller；First input of the first adder
It holds as the active first input end for adjusting unit；Second input terminal of the first adder is as the active adjusting
Second input terminal of unit；The first adder is for seeking between the frequency given value and the first frequency value of feedback
Difference and export to the frequency ring controller；The frequency ring controller is used to carry out closed-loop control generation to the difference
Active power given value；
The active power ring includes sequentially connected second adder and active ring controller；The first of the second adder
Input terminal is as the active third input terminal for adjusting unit；The second input terminal and the frequency loop of the second adder
Controller connection；The second adder is for seeking between the active power given value and the active power feedback value
Difference is simultaneously exported to the active ring controller；The active ring controller is used to carry out closed-loop control generation to the difference of input
Active power regulation signal.
8. power regulation control circuit according to claim 6, which is characterized in that the Reactive-power control unit includes successively
The Voltage loop and reactive power ring of connection；
The Voltage loop includes sequentially connected third adder and voltage ring controller；First input of the third adder
Hold the first input end as the Reactive-power control unit；Second input terminal of the third adder is as the Reactive-power control
Second input terminal of unit；The third adder is for seeking the output voltage given value and the output voltage value of feedback
Between difference and export to the voltage ring controller；The voltage ring controller is used to carry out closed loop control to the difference of input
System generates reactive power given value；
The reactive power ring includes sequentially connected 4th adder and idle ring controller；The first of 4th adder
Third input terminal of the input terminal as the Reactive-power control unit；Second input terminal of the 4th adder and the Voltage loop
Controller connection；4th adder is for seeking between the reactive power given value and the reactive power value of feedback
Difference is simultaneously exported to the idle ring controller；The idle ring controller is used to carry out closed-loop control generation to the difference of input
Reactive power adjustment signal.
9. power regulation control circuit according to claim 1, which is characterized in that further include control signal generating circuit and
Driving circuit；
The control signal generating circuit is connect with the power conditioning circuitry；The control signal generating circuit also with it is described not
The output end of uninterruptible power system connects, and exports current feedback values to receive it；The control signal generating circuit is used for basis
The power regulating signals and the output current feedback values generate control signal；
The driving circuit is connect with the control signal generating circuit, after the control signal is converted to driving signal
It exports to the uninterruptible power system.
10. a kind of uninterruptible power system characterized by comprising
Energy storage device；
Current transformer is connected between the energy storage device and points of common connection；And
Power regulation control circuit as described in claim 1~9 is any；The power regulation control circuit is described for exporting
Power regulating signals are controlled to the current transformer with the output to the current transformer, to realize to the uninterruptible power supply
The control of system output power.
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| CN113867191B (en) * | 2021-09-08 | 2024-05-07 | 浪潮金融信息技术有限公司 | Intelligent power supply control system, method and medium for terminal equipment |
| CN114243889A (en) * | 2021-12-28 | 2022-03-25 | 深圳市伊力科电源有限公司 | Uninterruptible power supply load adaptability regulation control method and system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006197719A (en) * | 2005-01-13 | 2006-07-27 | Densei Lambda Kk | Uninterruptible power supply unit, control method therefor, program for control, and uninterruptible power supply system |
| CN103151794A (en) * | 2013-01-11 | 2013-06-12 | 燕山大学 | Self-adaption power decoupling method of microgrid distributed power inverter |
| CN103414207A (en) * | 2013-07-15 | 2013-11-27 | 中国科学院电工研究所 | Droop control-based smooth switching method |
| CN104505847A (en) * | 2014-12-31 | 2015-04-08 | 上海电力学院 | Micro-grid droop control optimizing method based on sliding-mode control |
| CN105633959A (en) * | 2016-03-04 | 2016-06-01 | 易事特集团股份有限公司 | Uninterruptible power supply and control method thereof |
-
2017
- 2017-02-21 CN CN201710093884.3A patent/CN106849331B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006197719A (en) * | 2005-01-13 | 2006-07-27 | Densei Lambda Kk | Uninterruptible power supply unit, control method therefor, program for control, and uninterruptible power supply system |
| CN103151794A (en) * | 2013-01-11 | 2013-06-12 | 燕山大学 | Self-adaption power decoupling method of microgrid distributed power inverter |
| CN103414207A (en) * | 2013-07-15 | 2013-11-27 | 中国科学院电工研究所 | Droop control-based smooth switching method |
| CN104505847A (en) * | 2014-12-31 | 2015-04-08 | 上海电力学院 | Micro-grid droop control optimizing method based on sliding-mode control |
| CN105633959A (en) * | 2016-03-04 | 2016-06-01 | 易事特集团股份有限公司 | Uninterruptible power supply and control method thereof |
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