CN108599134A - Variable capacitance circuit and implementation method for intelligent grid - Google Patents
Variable capacitance circuit and implementation method for intelligent grid Download PDFInfo
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- CN108599134A CN108599134A CN201810372852.1A CN201810372852A CN108599134A CN 108599134 A CN108599134 A CN 108599134A CN 201810372852 A CN201810372852 A CN 201810372852A CN 108599134 A CN108599134 A CN 108599134A
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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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/02—Arrangements for reducing harmonics or ripples
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Abstract
The invention discloses a kind of variable capacitance circuits and implementation method for intelligent grid, are related to power electronics control field.The circuit includes：Three-phase H bridge main circuits, it has the first bridge arm, the second bridge arm and third bridge arm in parallel successively, first bridge arm, the second bridge arm and third bridge arm include switching device, and the first bridge arm connects end of incoming cables c1, end of incoming cables inductance L is connected between end of incoming cables c1 and the first bridge arm1；DC bus capacitor branch comprising the DC bus capacitor C in parallel with three-phase H bridge main circuitsdc；Exchange side energy storage branch comprising concatenated exchange lateral capacitance CacWith Inductor L2, exchange side energy storage branch is connected between the second bridge arm and third bridge arm, and is connected with leading-out terminal c2；DC bus capacitor CdcWith exchange lateral capacitance CacIt is non-electrolytic capacitor.The DC bus capacitor of the present invention uses non-electrolytic capacitor, reduces the volume of variable condenser, extends the service life of variable condenser.
Description
Technical field
The present invention relates to power electronics control fields, are specifically related to a kind of variable capacitance circuit for intelligent grid
And implementation method.
Background technology
FACTS (flexible AC transmission systems) is known as Flexible AC transmission system, is ensureing again
The reliable and stable operation of strays net and improvement power quality have played important function.All FACTS devices, such as series compensation
Device, shunt compensator and Unified Power Flow adjuster (UPFC), can theoretically regard a variable condenser as.Referring to Fig. 1 institutes
Show, is an ideal variable AC capacitor, the variation range of capacitance is 0~Cac.It is shown in Figure 2, a variable condenser
It can pass through there are one single-phase H bridge inverters and the electrolytic capacitor of one big capacitance composition and control input current isAdvanced input
Voltage usAngle is 90 °, and inverter is rendered into a capacitor.By the amplitude I for controlling input currentsSize, inverter is just
A continuous variable capacitor is presented.For single-phase inverter realizes variable condenser, the needs of DC side one are big
Electrolytic capacitor absorbs the ripple power of 2 times of power frequencies.Therefore, DC bus capacitor generally uses electrolytic capacitor, and bulky, power is close
Spend low, the service life is about 5000 hours, short life, to seriously affect volume and the service life of variable condenser.
Invention content
The purpose of the invention is to overcome the shortcomings of above-mentioned background technology, provide it is a kind of for intelligent grid can power transformation
Condenser circuit and implementation method.The DC bus capacitor of the present invention uses non-electrolytic capacitor, reduces the volume of DC bus capacitor, together
The service life of Shi Yanchang DC bus capacitors, and then the volume of variable condenser is reduced, extend the service life of variable condenser.
The present invention provides a kind of variable capacitance circuit for intelligent grid, which includes：
Three-phase H bridge main circuits have the first bridge arm, the second bridge arm and third bridge arm in parallel successively, first bridge
Arm, the second bridge arm and third bridge arm include switching device, and first bridge arm connects end of incoming cables c1, end of incoming cables c1 and the first bridge
End of incoming cables inductance L is connected between arm1；
DC bus capacitor branch comprising the DC bus capacitor C in parallel with three-phase H bridge main circuitsdc；
Exchange side energy storage branch comprising concatenated exchange lateral capacitance CacWith Inductor L2, exchange side energy storage branch
It is connected between the second bridge arm and third bridge arm, and is connected with leading-out terminal c2；
Wherein, the DC bus capacitor CdcWith exchange lateral capacitance CacIt is non-electrolytic capacitor.
Based on the above technical solution, first bridge arm, the second bridge arm and third bridge arm include two concatenated
Switching device has the first tie point a between two switching devices of the first bridge arm, has between two switching devices of the second bridge arm
Second tie point b has third tie point c, end of incoming cables inductance L between two switching devices of third bridge arm1With the first tie point a
Connection, leading-out terminal c2 are connect with the second tie point b, Inductor L2It is connect with third tie point c.
Based on the above technical solution, switching device used by the three-phase H bridge main circuits is that field of electric force effect is brilliant
In body pipe POWER MOSFET, insulated gate bipolar transistor IGBT, gate level turn-off thyristor GTO and power transistor GTR
Any one or a variety of combinations.
Based on the above technical solution, the DC bus capacitor CdcFor thin-film capacitor, exchange lateral capacitance CacFor film
Capacitance.
The present invention also provides a kind of implementation method based on the above-mentioned variable capacitance circuit for intelligent grid, this method
Include the following steps：
Holding circuit DC bus capacitor CdcOn voltage UdcIt is constant；
Control power network current isSo that power network current isAdvanced network voltage us90 degree, the circuit constitutes variable capacitance
Device；
To exchanging lateral capacitance CacVoltage uCacWith electric current iCacDouble-closed-loop control is carried out, by DC bus capacitor CdcEnergy
It is transferred completely into exchange lateral capacitance CacUpper storage.
Based on the above technical solution, the method further includes：
According to the requirement of intelligent grid, the size of target control amount is determined；Wherein, target control amount includes DC bus capacitor
CdcOn voltagePower network currentExchange lateral capacitance CacVoltageAnd electric current
Further according to actual DC bus capacitor C in target control amount and circuitdcOn voltage Udc, power network current is, exchange
Lateral capacitance CacVoltage uCacAnd electric current iCac, it is calculated on each bridge arm for controlling the electricity that switching device turns on and off
Press signal.
Based on the above technical solution, holding circuit DC bus capacitor CdcOn voltage UdcIt is constant to use PI algorithms；
Constituting variable condenser, double-closed-loop control and energy, all transfer is all made of quasi- PR algorithms.
Based on the above technical solution, first bridge arm, the second bridge arm and third bridge arm are by two derailing switches
Part is in series, there is the first tie point a between two switching devices of the first bridge arm, between two switching devices of the second bridge arm
There is the second tie point b, has third tie point c between two switching devices of third bridge arm；
Using PI algorithms and quasi- PR algorithms, the voltage u between the first tie point a and the second tie point b is calculatedab, adopt
The voltage u between third tie point c and the second tie point b is calculated with quasi- PR algorithmscb。
Based on the above technical solution, according toThe voltage u of the first tie point a is calculatedaWith
The voltage u of second tie point bb；
According to uc=ub=ucb, the voltage u of third tie point c is calculatedc。
Based on the above technical solution, will believe for controlling the voltage that switching device turns on and off on each bridge arm
Number, after being converted to pulse width modulation (PWM) control signal, then it is output to bridge arm.
Compared with prior art, advantages of the present invention is as follows：The present invention will need to be stored in DC bus capacitor C originallydc's
Exchange lateral capacitance C of the energy transfer to exchange side energy storage branchacIn, by DC bus capacitor CdcWith exchange lateral capacitance CacCapacitance
It all minimizes, non-electrolytic capacitor can be converted to the electrolytic capacitor of DC side, non-electrolytic capacitor may be used in exchange side.
Since the volume ratio electrolytic capacitor of non-electrolytic capacitor is small, the service life also considerably beyond electrolytic capacitor, after electrolytic capacitor is cancelled, can be changed
The volume of capacitor reduces, and the service life extends, and can serve intelligent grid safer and more effectively.
Description of the drawings
Fig. 1 is the circuit diagram of existing one ideal variable condenser.
Fig. 2 is the circuit diagram of an existing variable condenser.
Fig. 3 is the variable capacitance circuit figure for intelligent grid of the embodiment of the present invention.
Fig. 4 is the Computing Principle of the implementation method of the variable capacitance circuit for intelligent grid of the embodiment of the present invention
Figure.
Fig. 5 is electric current loop open loop Bode figures according to an embodiment of the invention.
Fig. 6 is Voltage loop open loop Bode figures according to an embodiment of the invention.
Fig. 7 is electric current loop closed loop Bode figures according to an embodiment of the invention.
Fig. 8 is control voltage pattern according to an embodiment of the invention.
Fig. 9 is DC voltage figure according to an embodiment of the invention.
Figure 10 is current on line side figure according to an embodiment of the invention.
Figure 11 is the voltage and current figure on ac capacitor according to an embodiment of the invention.
Specific implementation mode
Below in conjunction with the accompanying drawings and specific embodiment the present invention is described in further detail.
Shown in Figure 3, the embodiment of the present invention provides a kind of variable capacitance circuit for intelligent grid, three-phase H bridges
Main circuit, DC bus capacitor branch and exchange side energy storage branch.
Wherein, first bridge arm, second bridge arm and third bridge arm of the three-phase H bridges main circuit with parallel connection successively, described first
Bridge arm, the second bridge arm and third bridge arm include switching device, and first bridge arm connects end of incoming cables c1, end of incoming cables c1 and first
End of incoming cables inductance L is connected between bridge arm1。
DC bus capacitor branch includes the DC bus capacitor C in parallel with three-phase H bridge main circuitsdc；Exchange side energy storage branch packet
Include concatenated exchange lateral capacitance CacWith Inductor L2, exchange side energy storage branch be connected to the second bridge arm and third bridge arm it
Between, and be connected with leading-out terminal c2；
Wherein, exchange lateral capacitance CacFor non-electrolytic capacitor, DC bus capacitor CdcFor non-electrolytic capacitor.Specifically, described straight
Flow lateral capacitance CdcWith exchange lateral capacitance CacIt is non-electrolytic capacitor.
In the present embodiment, the first bridge arm, the second bridge arm and third bridge arm include two concatenated switching devices, the first bridge
There is the first tie point a between two switching devices of arm, there is the second tie point b between two switching devices of the second bridge arm, the
There are third tie point c, end of incoming cables inductance L between two switching devices of three bridge arms1It is connect with the first tie point a, leading-out terminal c2
It is connect with the second tie point b, Inductor L2It is connect with third tie point c.
Switching device used by three-phase H bridge main circuits is power metal oxide semiconductor field effect transistor POWER MOSFET, IGBT
(Insulated Gate Bipolar Transistor, insulated gate bipolar transistor), GTO (Gate Turn
OffThyristor, gate level turn-off thyristor) and GTR (Giant Transistor, power transistor) in any one
Or a variety of combination.
Shown in Figure 4, the embodiment of the present invention also provides a kind of realization of the variable capacitance circuit for intelligent grid
Method includes the following steps：
S1, the requirement according to intelligent grid, determine the size of target control amount；
Wherein, target control amount includes DC bus capacitor CdcOn voltagePower network currentExchange lateral capacitance Cac's
VoltageAnd electric current
The present invention provides one embodiment, designs a 2KVA variable condenser, and key parameter is as shown in table 1.
1 parameter list of table
According to the direction taken, since capacitive is presented in entire circuit, then network voltage and electric current are written as respectively：
Grid side power is：
ps=usis=UsIs sin(2ωt) (2)
The voltage and current of ac capacitor can be write as：
For network voltage vectorWith capacitance voltage vectorBetween angle
The power of ac capacitor is：
Again：
So：
If meeting ps=pac, then 2 ripple energies will all be absorbed by ac capacitor.If at this point, meeting following
Condition：Uac=Us, Iac=IsIt can reach the purpose that ac capacitor absorbs 2 ripples.
So：
So：
U under normal conditionsdcWith UsFor the same order of magnitude, Δ UdcGenerally Udc5%.By formula as can be seen that exchange
Capacitance can be reduced to 1st/20th of direct current capacitance.
S2, to actual DC bus capacitor C in circuitdcOn voltage Udc, power network current is, exchange lateral capacitance CacElectricity
Press uCacWith electric current iCacIt is controlled；
Specific control process includes,
Part I：Holding circuit DC bus capacitor CdcOn voltage UdcIt is constant；
Part II：Control power network current isSo that power network current isAdvanced network voltage us90 degree, circuit composition can power transformation
Container；
Part III：To exchanging lateral capacitance CacVoltage uCacWith electric current iCacDouble-closed-loop control is carried out, by DC bus capacitor
CdcEnergy be transferred completely into exchange lateral capacitance CacUpper storage.
In the present embodiment, part I uses PI algorithms, and part II and part III are all made of quasi- PR algorithms.
Quasi- PR algorithms can be to the DAZ gene of sinusoidal signal, the transmission function of quasi- PR algorithms：
Wherein, ω0For resonance angular frequency, ωcThe cut-off angular frequency of device in order to control.Kp, KrThe coefficient of device in order to control, s are one
A variable, representative is the domains s.
ω is taken in system0=2*50*3.14=314rad/s, ωc=2*4*3.14=25.12rad/s.
In the II of part, the parameter of quasi- PR algorithms is：Kp=2, Kr=6.
The double-closed-loop control of part III, as shown in figure 4,
The open-loop transfer function of current inner loop is：
Therefore, current inner loop closed loop transfer function, is：
The parameter of quasi- PR controllers is：Kp=6, Kr=10.
The open-loop transfer function of outer voltage is：
Therefore, outer voltage closed loop transfer function, is：
The parameter of quasi- PR algorithms is：Kp=1.8, Kr=5.
The open closed loop Bode diagram of the quasi- PR algorithms of current inner loop and outer voltage is as shown in Fig. 5,6 and 7.It can from Figures 5 and 6
To find out, two open loop Bode diagram at 314rad/s (50Hz) there are one resonance peak, and the phase of quasi- PR controllers at this time
Position delay is 0 degree.From figure 7 it can be seen that the amplitude attenuation very little at Bode diagram 314rad/s after closed loop, parameter selection obtain
When.
S3, according to actual DC bus capacitor C in target control amount and circuitdcOn voltage Udc, power network current is, exchange
Lateral capacitance CacVoltage uCacAnd electric current iCac, it is calculated on each bridge arm for controlling the electricity that switching device turns on and off
Signal is pressed, realizes variable condenser and by DC bus capacitor CdcEnergy be transferred completely into exchange lateral capacitance CacUpper storage.At this
In embodiment, switching device S1, S2, S3, S4, S5 and S6.
Wherein, holding circuit DC bus capacitor CdcOn voltage UdcIt is constant to use PI algorithms；Constitute variable condenser, double
All transfer is all made of quasi- PR algorithms for closed-loop control and energy.In practical applications, actual DC bus capacitor C in circuitdcOn
Voltage Udc, power network current is, exchange lateral capacitance CacVoltage uCacWith electric current iCacIt is obtained by voltage-current sensor, then
Actual DC bus capacitor CdcOn voltage Udc, power network current is, exchange lateral capacitance CacVoltage uCacWith electric current iCacIt is converted into
The signal that control system can identify.The processor of control system includes nextport universal digital signal processor NextPort, application-specific integrated circuit
ASIC, field programmable logic controller PLC, complex programmable logic device (CPLD), on-site programmable gate array FPGA.
In the present embodiment, the first bridge arm, the second bridge arm and third bridge arm include two concatenated switching devices, the first bridge
There is the first tie point a between two switching devices of arm, there is the second tie point b between two switching devices of the second bridge arm, the
There is third tie point c between two switching devices of three bridge arms；
Using PI algorithms and quasi- PR algorithms, the voltage u between the first tie point a and the second tie point b is calculatedab, adopt
The voltage u between third tie point c and the second tie point b is calculated with quasi- PR algorithmscb。
According toThe voltage u of the first tie point a is calculatedaWith the voltage u of the second tie point bb；
According to uc=ub=ucb, the voltage u of third tie point c is calculatedc。
Specifically, the voltage signal u that will be turned on and off on each bridge arm for controlling switching devicea、ubAnd uc, conversion
After controlling signal for pulse width modulation (PWM), then it is output to bridge arm.
Shown in Fig. 8 to Figure 11, the control voltage of the embodiment of the present invention, network side current waveform, capacitance are respectively illustrated
Voltage and capacitance current relationship and DC voltage.
The first tie point a is as third tie point c phase control voltages as seen from Figure 8, the second tie point b phases with
Other two-phase amplitudes are the same, 180 ° of phase difference.As seen from Figure 9, after about 0.02 second, DC voltage UdcIt is basicly stable
.As seen from Figure 10, after about 0.01 second, power network current isReach ideal value.As seen from Figure 11, by about
After 0.02 second, lateral capacitance C is exchangedacVoltage uCacWith electric current iCacBasicly stable, the energy of 2 ripples is transferred completely into exchange side
Capacitance Cac。
It is effective for can be seen that the implementation method by above-mentioned design and result.By the way that DC side harmonics energy is turned
The thought of exchange side is moved on to, capacitor's capacity can be reduced, and then thin-film capacitor may be used, the service life of thin-film capacitor is about
10000 hours, volume was far smaller than electrolytic capacitor, and the service life reduces variable condenser considerably beyond electrolytic capacitor, to realize
Volume increases the purpose in the service life of variable condenser.
Those skilled in the art can be carry out various modifications to the embodiment of the present invention and modification, if these modifications and change
For type within the scope of the claims in the present invention and its equivalent technologies, then these modifications and variations are also in protection scope of the present invention
Within.
The prior art that the content not being described in detail in specification is known to the skilled person.
Claims (10)
1. a kind of variable capacitance circuit for intelligent grid, which is characterized in that including：
Three-phase H bridge main circuits, have the first bridge arm, the second bridge arm and a third bridge arm in parallel successively, first bridge arm, the
Two bridge arms and third bridge arm include switching device, and first bridge arm connects end of incoming cables c1, end of incoming cables c1 and the first bridge arm it
Between be connected with end of incoming cables inductance L1；
DC bus capacitor branch comprising the DC bus capacitor C in parallel with three-phase H bridge main circuitsdc；
Exchange side energy storage branch comprising concatenated exchange lateral capacitance CacWith Inductor L2, the connection of exchange side energy storage branch
It is connected between the second bridge arm and third bridge arm, and with leading-out terminal c2；
Wherein, the DC bus capacitor CdcWith exchange lateral capacitance CacIt is non-electrolytic capacitor.
2. being used for the variable capacitance circuit of intelligent grid as described in claim 1, it is characterised in that：First bridge arm,
Second bridge arm and third bridge arm include two concatenated switching devices, have the first connection between two switching devices of the first bridge arm
Point a has the second tie point b between two switching devices of the second bridge arm, has third between two switching devices of third bridge arm
Tie point c, end of incoming cables inductance L1It is connect with the first tie point a, leading-out terminal c2 is connect with the second tie point b, Inductor L2With
The c connections of third tie point.
3. being used for the variable capacitance circuit of intelligent grid as described in claim 1, it is characterised in that：The three-phase H bridge masters
Switching device used by circuit is power metal oxide semiconductor field effect transistor POWER MOSFET, insulated gate bipolar transistor IGBT, gate pole
Any one in turn-off thyristor GTO and power transistor GTR or a variety of combinations.
4. being used for the variable capacitance circuit of intelligent grid as described in claim 1, it is characterised in that：The DC bus capacitor
CdcFor thin-film capacitor, exchange lateral capacitance CacFor thin-film capacitor.
5. a kind of realization side based on the variable capacitance circuit for intelligent grid described in any one of claim 1-4
Method, which is characterized in that include the following steps：
Holding circuit DC bus capacitor CdcOn voltage UdcIt is constant；
Control power network current isSo that power network current isAdvanced network voltage us90 degree, the circuit constitutes variable condenser；
To exchanging lateral capacitance CacVoltage uCacWith electric current iCacDouble-closed-loop control is carried out, by DC bus capacitor CdcEnergy all turn
Move on to exchange lateral capacitance CacUpper storage.
6. the implementation method for the variable capacitance circuit of intelligent grid as claimed in claim 5, which is characterized in that described
Method further includes：
According to the requirement of intelligent grid, the size of target control amount is determined；Wherein, target control amount includes DC bus capacitor CdcOn
VoltagePower network currentExchange lateral capacitance CacVoltageAnd electric current
Further according to actual DC bus capacitor C in target control amount and circuitdcOn voltage Udc, power network current is, exchange side electricity
Hold CacVoltage uCacAnd electric current iCac, the voltage letter turned on and off on each bridge arm for controlling switching device is calculated
Number.
7. the implementation method for the variable capacitance circuit of intelligent grid as claimed in claim 6, it is characterised in that：It maintains
Circuit direct lateral capacitance CdcOn voltage UdcIt is constant to use PI algorithms；It is whole to constitute variable condenser, double-closed-loop control and energy
Transfer is all made of quasi- PR algorithms.
8. the implementation method for the variable capacitance circuit of intelligent grid as claimed in claim 7, it is characterised in that：It is described
First bridge arm, the second bridge arm and third bridge arm are in series by two switching devices, two switching devices of the first bridge arm it
Between have the first tie point a, have the second tie point b, two derailing switches of third bridge arm between two switching devices of the second bridge arm
There is third tie point c between part；
Using PI algorithms and quasi- PR algorithms, the voltage u between the first tie point a and the second tie point b is calculatedab, using standard
The voltage u between third tie point c and the second tie point b is calculated in PR algorithmscb。
9. the implementation method for the variable capacitance circuit of intelligent grid as claimed in claim 8, it is characterised in that：
According toThe voltage u of the first tie point a is calculatedaWith the voltage u of the second tie point bb；
According to uc=ub=ucb, the voltage u of third tie point c is calculatedc。
10. the implementation method for the variable capacitance circuit of intelligent grid as claimed in claim 6, it is characterised in that：It will
For controlling the voltage signal that switching device turns on and off on each bridge arm, pulse width modulation (PWM) control signal is converted to
Afterwards, then it is output to bridge arm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112234809A (en) * | 2020-09-30 | 2021-01-15 | 中南民族大学 | Circuit and method for eliminating secondary ripples of single-phase back-to-back converter device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103023360A (en) * | 2012-07-03 | 2013-04-03 | 中南大学 | Single-phase alternating current (AC)/ direct current (DC) converter with secondary fluctuating power decoupling and control method thereof |
| CN103986185A (en) * | 2014-05-06 | 2014-08-13 | 特变电工新疆新能源股份有限公司 | Photovoltaic grid-connected inverter with active power decoupling function |
-
2018
- 2018-04-24 CN CN201810372852.1A patent/CN108599134B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103023360A (en) * | 2012-07-03 | 2013-04-03 | 中南大学 | Single-phase alternating current (AC)/ direct current (DC) converter with secondary fluctuating power decoupling and control method thereof |
| CN103986185A (en) * | 2014-05-06 | 2014-08-13 | 特变电工新疆新能源股份有限公司 | Photovoltaic grid-connected inverter with active power decoupling function |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112234809A (en) * | 2020-09-30 | 2021-01-15 | 中南民族大学 | Circuit and method for eliminating secondary ripples of single-phase back-to-back converter device |
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