CN108521126A - A kind of Hybrid power filter and its control method and device - Google Patents
A kind of Hybrid power filter and its control method and device Download PDFInfo
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- CN108521126A CN108521126A CN201810519409.2A CN201810519409A CN108521126A CN 108521126 A CN108521126 A CN 108521126A CN 201810519409 A CN201810519409 A CN 201810519409A CN 108521126 A CN108521126 A CN 108521126A
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
- H02H9/025—Current limitation using field effect transistors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Abstract
The present invention proposes a kind of Hybrid power filter, includes at least transverter 1, transverter 2, transformer 1, switch 1 and reactive-load compensation equipment；Transverter 1 includes exchange side interface and direct current side interface, and transverter 1 is by exchanging side interface incoming transport system；Reactive-load compensation equipment incoming transport system；Transverter 2 has direct current side interface, exchange side interface and the identical branch circuit of six structures.Each branch circuit is connected in series by two distinct types of power cell, a reactor.The DC side anode interface of transverter 1,2, cathode interface are respectively connected with.Additionally the switchgear distribution method of Hybrid power filter is illustrated.The present invention also accordingly proposes a kind of control method and device of series compensator.Hybrid power filter proposed by the present invention, using by way of two different power cells, effectively reduces DC voltage and power transverter 2, to substantially reduce compensator cost.
Description
Technical field
The invention belongs to power electronics fields in electric system, and in particular to a kind of Hybrid power filter and its controlling party
Method and device.
Background technology
Electric system rapidly develops, as load constantly increases, grid structure is increasingly complicated, new energy accesses on a large scale,
The problems such as trend is unevenly distributed, voltage support scarce capacity, short circuit current are excessive, electromechanical oscillations is often interweaved, and gives power grid
Operation control brings new challenge.Due to the saturation in transmission of electricity corridor and the commercial operation of grid company, new by construction
Transmission line of electricity come increase transmission line capability will be more and more difficult.FACTS refers to using power electronic equipment and other static controllers
It improves the AC transmission system of system controllability and measurability and power delivering capability, provides scheme in order to solve the above problem.
For the static synchronous series compensator SSSC using modular multi-electrical-level voltage source current converter, Unified Power Flow control
Between device UPFC and line flow controller IPFC etc. have series compensation with and the functions such as phase shifting control compensator, can optimize
Regulating system trend, but the power cell used, due to the afterflow effect of its diode, cannot rely on itself, quickly control is realized
DC Line Fault self-cleaning, and catastrophe failure can influence the safety of equipment, it is therefore desirable to one kind, can while optimization system trend
To reduce electric current when DC voltage occurs with failure in the case where the alternating voltage for ensureing to be serially accessed to the circuit is constant, and can more pacify
The complete reliable compensator for inhibiting DC side fault current.
Invention content
The purpose of the present invention is to provide a kind of Hybrid power filter and its control method and device, there is voltage to adjust, nothing
The institute such as work(compensation, series compensation and phase shifting control is functional, and can quickly control the active and reactive power of transmission line of electricity, effectively
DC voltage and power are reduced, fault current when DC side failure is reduced, significantly reduces the cost of compensator, is suitable for
Engineer application.
In order to achieve the above object, solution of the invention is：
A kind of Hybrid power filter includes at least transverter 1, transverter 2, transformer 1, switch 1 and reactive-load compensation equipment；
Wherein：
The transverter 1 includes exchange side interface and direct current side interface, passes through the exchange side interface incoming transport system；
The reactive-load compensation equipment incoming transport system；The transverter 2 is made of six branch circuits；The first end of branch circuit 1
It is connected with the first end of branch circuit 2, tie point is exchange side interface 1；The first end of branch circuit 3 and the of branch circuit 4
One end connects, and tie point is exchange side interface 2；The first end of branch circuit 5 is connected with the first end of branch circuit 6, tie point
To exchange side interface 3；The second end of branch circuit 1 is connect with the second end of the second end of branch circuit 3, branch circuit 5, connection
Point is used as DC side anode interface；The second end of branch circuit 2 connects with the second end of branch circuit 4, the second end of branch circuit 6
It connects, tie point is as DC side cathode interface；The DC side anode interface of the transverter 1,2, cathode interface are respectively connected with.
The transformer 1 is three-phase transformer, includes at least both sides winding, the friendship of the first side winding and the transverter 2
Flow side interface connection, the second side windings in series line attachment；The both ends of the second side winding are connected in parallel the switch 1；
There are two types of composition proposals for the branch circuit：
Scheme one：The branch circuit is combined by power cell and reactor is connected in series with and constitutes；The branch circuit 1,
3, in 5, the first end of the 1st end of the reactor as the branch circuit, what the 2nd end of reactor was combined with power cell
Output end 1 connects, second end of the output end 2 that power cell combines as the branch circuit；The branch circuit 2,4,6
In, the first end of the 1st end of the reactor as the branch circuit, the 2nd end of reactor is combined defeated with power cell
Outlet 2 connects, second end of the output end 1 that power cell combines as the branch circuit.
Scheme two：The branch circuit is combined by power cell and reactor is connected in series with and constitutes；The branch circuit 1,
3, in 5, the first end of the output end 1 of power cell combination as the branch circuit, the output end 2 that power cell combines
It is connect with the 1st end of the reactor, the second end of the 2nd end of the reactor as the branch circuit；Branch's electricity
In road 2,4,6, power cell combination output end 2 be the branch circuit first end, power cell combination output end 1 with
1st end of the reactor connects, the second end of the 2nd end of the reactor as the branch circuit；
The power cell combination, which is connected in series with by power cell 1 with power cell 2, to be constituted, or all by power cell
2 compositions；
The power cell 1 is at least made of turn-off device T1, turn-off device T2 and capacitance C1；The capacitance C1's
One end is connected with the anode of the turn-off device T1；The cathode phase of the other end of the capacitance C1 and the turn-off device T2
Even, the output end 1 as power cell 1；The anode of the turn-off device T2 is connected with the cathode of turn-off device 1, as
The output end 2 of power cell 1；
The power cell 2 is at least by turn-off device T3, turn-off device T4, turn-off device T5, turn-off device
T6 and capacitance C2 are constituted；One end of the capacitance C2 and the anode of the turn-off device T3, the positive phase of turn-off device T4
Even；The other end of the capacitance C2 is connected with the cathode of the cathode of the turn-off device T5, turn-off device T6；It is described to close
The cathode of disconnected device T3 is connected with the anode of turn-off device T5, the output end 2 as power cell 2；The turn-off device
The cathode of T4 is connected with the anode of turn-off device T6, the output end 1 as power cell 2；
Such as a kind of above-mentioned Hybrid power filter, the power cell combination is connected in series with by power cell 1 and power cell 2
When composition, power cell 1 and power cell 2 in the power cell combination can be connected in series in any order.
Such as a kind of above-mentioned Hybrid power filter, the turn-off device is using a controllable switch device or multiple controllably opens
It closes devices in series or is formed in parallel.
Such as a kind of above-mentioned Hybrid power filter, the turn-off device of the power cell includes but not limited to：IGBT、
IGCT、MOSFET、GTO。
Such as a kind of above-mentioned Hybrid power filter, when the turn-off device uses IGBT, described just extremely its collector, institute
It is its emitter to state cathode；When the turn-off device uses IGCT or GTO, described just extremely its anode, the cathode are it
Cathode；When the turn-off device uses MOSFET, described just extremely it drains, and the cathode is its source electrode.
Such as a kind of above-mentioned Hybrid power filter, the transverter 1 is through 2 incoming transport system of transformer, the transformer 2
Three-phase transformer includes at least both sides winding, and the transverter 1 exchanges side interface and is connected with 2 first side winding of the transformer,
2 the second side winding parallel incoming transport system of the transformer；
Such as a kind of above-mentioned Hybrid power filter, it is in parallel to exchange configuration between side interface and AC system in the transverter 1
The resistance and switching device of connection, the switching device include but not limited to disconnecting link and switch.
Such as a kind of above-mentioned Hybrid power filter, the transverter 1 can be voltage source converter, including but not limited to：
Two level, three level, transformer multiple inverter configuration and modular multilevel structure.
Such as a kind of above-mentioned Hybrid power filter, which is characterized in that the transverter 1 includes but not limited to：Thyristor converter
The uncontrollable rectifier bridge of device, diode composition.
Such as a kind of above-mentioned Hybrid power filter, the reactive-load compensator includes but not limited to：Fixed capacitor, by machinery
The capacitor of switch or thyristor switch switching, can the subdivided capacitor group of switching, SVC static passive compensation devices.
Such as a kind of above-mentioned Hybrid power filter, access of connecting between 1 the second side winding of the transformer and the circuit
Compensation device 1.
Such as a kind of above-mentioned Hybrid power filter, side interface is exchanged with the transverter 2 in 1 first side winding of the transformer
Between series connection access compensation device 2.
Such as a kind of above-mentioned Hybrid power filter, the compensation device 1, compensation device 2 by reactor group and switching device simultaneously
Connection connection, the reactor group is connected in series with by least one reactor, the switching device include but not limited to mechanical switch,
The switch that power electronic devices is constituted.
Such as a kind of above-mentioned Hybrid power filter, by-pass switch dress is connected in parallel at 1 first side winding both ends of the transformer
Set, the bypass switch arrangement include but not limited to mechanical switch, power electronic devices constitute switch.
Such as a kind of above-mentioned Hybrid power filter, 1 first side winding of the transformer uses star-star connection mode or triangle
The shape mode of connection.
Such as a kind of above-mentioned Hybrid power filter, 1 first side winding of the transformer uses star-star connection mode, neutral point straight
Ground connection or resistance grounded；The transformer 1 includes third side winding, and third side winding uses delta connection.
The present invention proposes that a kind of control method of Hybrid power filter, 2 primary method of control of transverter are as follows simultaneously：
Circuit active power controller, circuit Active Power Controller is by circuit active power command value and circuit active power
The deviation of measured value obtains the active power reference value of transverter 2 by controller；
Circuit Reactive Power Control, circuit reactive power controller is by circuit reactive power command value and circuit reactive power
The deviation of measured value obtains the reactive power reference qref of transverter 2 by controller；
Exchange side interface current calculates, and according to 2 active power reference value of transverter and reactive power reference qref, calculates the change of current
2 exchange side interface current reference value of device；
Exchange side interface voltage calculates, and according to the result of calculation that above-mentioned exchange side interface current calculates, calculates transverter 2
The reference value of exchange side output voltage；
Power cell controls, and according to the reference value of 2 exchange side output voltage of transverter, controls in power cell and opens switching off device
Part is opened and is turned off, and the combinations of voltages that power module 1 and power module 2 export is controlled, and makes the synchronization output voltage be respectively
0, capacitance voltage, the power cell 1 of capacitance voltage negative value and the number of power 2 meet exchange side, the ginseng of DC side output voltage
Value is examined, DC voltage is reduced in the case where ensureing that the compensation of series side is unaffected.
Further, the control method further includes start-up and shut-down control, when startup, first starts transverter 1, establishes direct current
Pressure, then unlock transverter 2；After transverter 2 unlocks, the electric current of switch 1 can be made to be gradually reduced by control, line current is gradual
It is transferred on 1 the second side winding of transformer, after 1 electric current of switch becomes zero, then disconnects switch 1, complete Hybrid power filter and start；
When stoppage in transit, it is equal with line current first to control 1 the second side winding current of transformer, then closes a switch 1, and then control electric current is gradual
It being transferred on switch 1 from 1 the second side winding of transformer, 1 the second side winding current of transformer is latched transverter 2 again after being zero, then
Transverter 1 is exited, Hybrid power filter is completed and stops transport.
The present invention proposes a kind of control device of Hybrid power filter, including circuit active power controller unit, line simultaneously
Road Reactive Power Control unit, exchange side interface current computing unit, exchange side interface voltage computing unit, power cell control
Unit, wherein：
The circuit active power controller unit, according to circuit active power command value and circuit wattful power messurement value
Deviation obtains the active power reference value of transverter 2；
The circuit Reactive Power Control unit, according to circuit reactive power command value and circuit wattless power measurement value
Deviation obtains the reactive power reference qref of transverter 2；
The exchange side interface current computing unit, according to 2 active power reference value of transverter and reactive power reference qref,
Calculate 2 exchange side interface current reference value of transverter；
The exchange side interface voltage computing unit, according to the result of calculation of above-mentioned exchange side interface current computing unit,
Calculate the reference value of 2 exchange side output voltage of transverter；
The power cell control unit is controlled according to the reference value of 2 exchange side output voltage of transverter in power cell
The disconnected device of switch is opened and is turned off, and the combinations of voltages that power module 1 and power module 2 export is controlled, and makes synchronization output electricity
Pressure is respectively 0, capacitance voltage, the power cell 1 of capacitance voltage negative value meets exchange side with the number of power 2, DC side exports
The reference value of voltage reduces DC voltage in the case where ensureing that the compensation of series side is unaffected.
Further, the control device further includes start-up and shut-down control unit；
The start-up and shut-down control unit when startup, first starts transverter 1, establishes DC voltage, then unlock transverter 2；The change of current
Device 2 unlock after, can by control so that the electric current of switch 1 is gradually reduced, line current be gradually transferred to 1 the second side of transformer around
In group, after 1 electric current of switch becomes zero, then switch 1 is disconnected, completes Hybrid power filter and start；When stoppage in transit, transformer 1 is first controlled
The second side winding current is equal with line current, then closes a switch 1, then controls electric current gradually from 1 the second side winding of transformer
It is transferred on switch 1,1 the second side winding current of transformer is latched transverter 2 again after being zero, then exits transverter 1, completes mixing
Compensator is stopped transport.
The beneficial effects of the invention are as follows：
1, Hybrid power filter proposed by the present invention has the institutes such as voltage adjusting, reactive-load compensation, series compensation and phase shifting control
It is functional, and can quickly control the active and reactive power of transmission line of electricity.2, Hybrid power filter proposed by the present invention passes through the change of current
Device 2 effectively reduces DC voltage and power by the way of two different power cells, to substantially reduce compensation
Device cost, is suitable for engineer application.
Description of the drawings
Fig. 1 is a kind of Hybrid power filter circuit diagram of the present invention, including transverter 1, transverter 2, transformer 1, switch 1
And reactive-load compensation equipment；
Fig. 2 is the schematic diagram that a kind of Hybrid power filter transverter 1 of the present invention connects AC system by transformer 2；
Fig. 3 is that configuration is in parallel between a kind of exchange side interface of transverter 1 of Hybrid power filter of the present invention and AC system
Resistance and switching device schematic diagram；
Fig. 4 is a kind of schematic diagram of the transverter 1 of Hybrid power filter of the present invention using two level converters；
Fig. 5 is a kind of schematic diagram of the transverter 1 of Hybrid power filter of the present invention using three-level converter；
Fig. 6 is a kind of schematic diagram of the transverter 1 of Hybrid power filter of the present invention using modularization multi-level converter；
Fig. 7 is a kind of schematic diagram of the transverter 1 of Hybrid power filter of the present invention using thyristor device transverter；
Fig. 8 is a kind of schematic diagram of the transverter 1 of Hybrid power filter of the present invention using diode uncontrollable rectifier bridge；
Fig. 9 is a kind of schematic diagram of the transverter 1 of Hybrid power filter of the present invention using class bridge-type power cell；
Figure 10 is a kind of Hybrid power filter series connection between 1 the second side winding of the transformer and the circuit of the present invention
Enter 1 schematic diagram of compensation device；
A kind of Hybrid power filter of Figure 11 present invention connects in 1 first side winding of the transformer with 2 exchange side of the transverter
Series connection access 2 schematic diagram of compensation device between mouthful；
Figure 12 is that a kind of Hybrid power filter of the present invention is connected in parallel by-pass switch at 1 first side winding both ends of the transformer
Schematic device.
Specific implementation mode
The specific implementation mode of the present invention is described in detail below in conjunction with the accompanying drawings.
Embodiment one
A kind of Hybrid power filter includes at least transverter 1, transverter 2, transformer 1, switch 1 and reactive-load compensation equipment,
As shown in Figure 1；Wherein：
The transverter 1 includes exchange side interface and direct current side interface, passes through the exchange side interface incoming transport system；
The reactive-load compensation equipment incoming transport system；The transverter 2 is made of six branch circuits；The first end of branch circuit 1
It is connected with the first end of branch circuit 2, tie point is exchange side interface 1；The first end of branch circuit 3 and the of branch circuit 4
One end connects, and tie point is exchange side interface 2；The first end of branch circuit 5 is connected with the first end of branch circuit 6, tie point
To exchange side interface 3；The second end of branch circuit 1 is connect with the second end of the second end of branch circuit 3, branch circuit 5, connection
Point is used as DC side anode interface；The second end of branch circuit 2 connects with the second end of branch circuit 4, the second end of branch circuit 6
It connects, tie point is as DC side cathode interface；The DC side anode interface of the transverter 1,2, cathode interface are respectively connected with.
The transformer 1 is three-phase transformer, includes at least both sides winding, the friendship of the first side winding and the transverter 2
Flow side interface connection, the second side windings in series line attachment；The both ends of the second side winding are connected in parallel the switch 1；
The branch circuit is combined by power cell and reactor is connected in series with and constitutes；
In the branch circuit 1,3,5, the first end of the 1st end of the reactor as the branch circuit, reactor
The output end 1 that is combined with power cell of the 2nd end connect, the output end 2 of power cell combination as the branch circuit the
Two ends；In the branch circuit 2,4,6, the first end of the 1st end of the reactor as the branch circuit, the of reactor
The output end 2 that 2 ends are combined with power cell connects, second end of the output end 1 that power cell combines as the branch circuit.
The power cell combination, which is connected in series with by power cell 1 with power cell 2, to be constituted；
The power cell 1 is at least made of turn-off device T1, turn-off device T2 and capacitance C1；The capacitance C1's
One end is connected with the anode of the turn-off device T1；The cathode phase of the other end of the capacitance C1 and the turn-off device T2
Even, the output end 1 as power cell 1；The anode of the turn-off device T2 is connected with the cathode of turn-off device 1, as
The output end 2 of power cell 1；
The power cell 2 is at least by turn-off device T3, turn-off device T4, turn-off device T5, turn-off device
T6 and capacitance C2 are constituted；One end of the capacitance C2 and the anode of the turn-off device T3, the positive phase of turn-off device T4
Even；The other end of the capacitance C2 is connected with the cathode of the cathode of the turn-off device T5, turn-off device T6；It is described to close
The cathode of disconnected device T3 is connected with the anode of turn-off device T5, the output end 2 as power cell 2；The turn-off device
The cathode of T4 is connected with the anode of turn-off device T6, the output end 1 as power cell 2；
Such as a kind of above-mentioned Hybrid power filter, power cell 1 and power cell 2 in the power cell combination can be by
It is connected in series with according to random order.
Such as a kind of above-mentioned Hybrid power filter, the turn-off device is using a controllable switch device or multiple controllably opens
It closes devices in series or is formed in parallel.
Such as a kind of above-mentioned Hybrid power filter, the turn-off device of the power cell includes but not limited to：IGBT、
IGCT、MOSFET、GTO。
Such as a kind of above-mentioned Hybrid power filter, when the turn-off device uses IGBT, described just extremely its collector, institute
It is its emitter to state cathode；When the turn-off device uses IGCT or GTO, described just extremely its anode, the cathode are it
Cathode；When the turn-off device uses MOSFET, described just extremely it drains, and the cathode is its source electrode.
Such as a kind of above-mentioned Hybrid power filter, the transverter 1 is through 2 incoming transport system of transformer, the transformer 2 the
Two side winding parallel incoming transport systems, the transformer are three-phase transformer, include at least both sides winding, the transverter 1
Exchange side interface is connected with 2 first side winding of the transformer, as shown in Figure 2；
Such as a kind of above-mentioned Hybrid power filter, which is characterized in that the transverter 1 exchange side interface and AC system it
Between configure the resistance and switching device being connected in parallel, switching device includes but not limited to disconnecting link and switch, as shown in Figure 3.
Such as a kind of above-mentioned Hybrid power filter, which is characterized in that the transverter 1 can be voltage source converter, packet
It includes but is not limited to：Two level, three level, transformer multiple inverter configuration and modular multilevel structure, such as Fig. 4, Fig. 5, Fig. 6 institute
Show.
Transverter 1 uses modular multilevel structure in the present embodiment, uses power module 3 or power in transverter 1
The series system of the random order of unit 4 or both, as shown in Figure 7；
The power cell 3 at least by turn-off device T5, turn-off device T6, turn-off device T7, diode D1 and
Capacitance C3 is constituted；The output that the anode of the turn-off device T5 is connected with the cathode of turn-off device T6 as power cell 3
End 2；One end of the capacitance C3, the positive of the turn-off device T6 are connected with the cathode of the diode D1；The capacitance
The other end of C3, the turn-off device T5 cathode be connected with the cathode of turn-off device T7；The two pole D2 anode with
The anode of turn-off device T7 is connected, the output end 1 as power cell 3；
The power cell 4 at least by turn-off device T8, turn-off device T9, turn-off device T10, diode D2 and
Capacitance C4 is constituted；The cathode of the diode D2 is connected the output end 2 as power cell 4 with the cathode of turn-off device T8；
The anode of turn-off device T8, the anode of turn-off device T10 are connected with one end of the capacitance C4；The diode D2 is just
Pole, the turn-off device T9 cathode be connected with the other end of the capacitance C4；The anode of the turn-off device T9 can close
The cathode of disconnected device T10 is connected, the output end 1 as power cell 4；
Such as a kind of above-mentioned Hybrid power filter, which is characterized in that the transverter 1 includes but not limited to：Thyristor converter
Device, the uncontrollable rectifier bridge of diode composition are as shown in Figure 8, Figure 9.
Such as a kind of above-mentioned Hybrid power filter, which is characterized in that the reactive-load compensator includes but not limited to：Fixed electricity
Container, by the capacitor of mechanical switch or thyristor switch switching, can the subdivided capacitor group of switching, SVC static reactives
Device.
Such as a kind of above-mentioned Hybrid power filter, which is characterized in that 1 the second side winding of the transformer and the circuit it
Between series connection access compensation device 1, as shown in Figure 10.
Such as a kind of above-mentioned Hybrid power filter, which is characterized in that in 1 first side winding of the transformer and the transverter
Series connection access compensation device 2 between 2 exchange side interfaces, as shown in figure 11.
Such as a kind of above-mentioned Hybrid power filter, which is characterized in that the compensation device 1, compensation device 2 by reactor group with
Switching device is connected in parallel, and the reactor group is connected in series with by least one reactor, and the switching device includes but unlimited
In the switch that mechanical switch, power electronic devices are constituted.
Such as a kind of above-mentioned Hybrid power filter, which is characterized in that be connected in parallel at 1 first side winding both ends of the transformer
Bypass switch arrangement, the bypass switch arrangement include but not limited to mechanical switch, power electronic devices constitute switch, such as scheme
Shown in 12.
Such as a kind of above-mentioned Hybrid power filter, which is characterized in that 1 first side winding of the transformer uses star-star connection side
Formula or delta connection mode.
Such as a kind of above-mentioned Hybrid power filter, which is characterized in that 1 first side winding of the transformer uses star-star connection side
Formula, neutral-point solid ground or resistance grounded；The transformer 1 includes third side winding, and third side winding uses
Delta connection.
Such as a kind of above-mentioned Hybrid power filter, turn-off device in power cell described in peripheral equipment control can be passed through
Conducting and shutdown, change the output voltage of regulation power unit, and then transverter 1 is made to be obtained in DC side, exchange side with transverter 2
To desired voltage；
Such as a kind of above-mentioned Hybrid power filter, 2 exchange side output voltage of transverter is serially accessed to the circuit by transformer, is equivalent to
The controllable voltage source of one amplitude and phase is sealed in circuit, the difference in magnitude and phase between circuit both end voltage are changed
Difference realizes the control and regulation of circuit active power and reactive power；1 incoming transport system of transverter controls side output in parallel
Idle or access point voltage, and play the role of maintaining DC bus-bar voltage；
Such as a kind of above-mentioned Hybrid power filter, the external output voltage of power cell 1 can be 0, can also be the power
The external output voltage of the voltage of capacitance in unit, power cell 2,3,4 can be 0, can also be capacitance in the power cell
Voltage, can also be the negative value of the voltage of capacitance in the power cell；The branch circuit 1 of transverter 2 and 2, branch circuit 3 with
4, branch circuit 5 is equal with the sum of 6 all external output voltages of power module, and DC voltage is equal to the external output voltage,
Therefore it can be reduced straight there are when power cell 2,3,4 that external output voltage is negative capacitance voltage in power cell combination
Side voltage is flowed, the cost of series and parallel device is reduced；Negative voltage is exported by controlling power module 2 when normal operation, it can be with
Reduce DC voltage while ensureing that the alternating voltage being serially accessed to the circuit is constant, while reducing electric current when failure occurs；Straight
When stream side is broken down, using the characteristic of 2,3,4 voltage bidirectional output of power module, effectively inhibit fault current；
In the present embodiment, Hybrid power filter external control system includes 1 control system of transverter and the control of transverter 2 system
System；
1 primary method of control of the transverter is as follows：
DC voltage control, DC voltage controller are passed through by the deviation of direct voltage reference value and dc voltage measurements
Controller obtains the active power reference value of transverter 1；Alternating voltage controls, and AC voltage controller is by alternating voltage reference value
With the deviation of ac voltage measurement value the reactive power reference qref of transverter 1 is obtained by controller；Reactive Power Control, it is idle
Power controller obtains the idle work(of transverter 1 by the deviation of reactive power reference qref and wattless power measurement value by controller
Rate reference value；
Exchange side interface current calculates, and according to 1 active power reference value of transverter and reactive power reference qref, calculates the change of current
1 exchange side interface current reference value of device.
Exchange side interface voltage calculates, and according to the result of calculation that above-mentioned exchange side interface current calculates, calculates transverter 1
The reference value of exchange side output voltage.
Power cell controls, and according to the reference value of 1 exchange side output voltage of transverter, controls in power cell and opens switching off device
Part is opened and is turned off, and the combinations of voltages that power module 3 and power module 4 export is controlled, and makes the synchronization output voltage be respectively
0, capacitance voltage, the power cell 3 of capacitance voltage negative value and the number of power 4 meet exchange side, the ginseng of DC side output voltage
Examine value；
2 primary method of control of the transverter is as follows：
Circuit active power controller, circuit Active Power Controller is by circuit active power command value and circuit active power
The deviation of measured value obtains the active power reference value of transverter 2 by controller；
Circuit Reactive Power Control, circuit reactive power controller is by circuit reactive power command value and circuit reactive power
The deviation of measured value obtains the reactive power reference qref of transverter 2 by controller；
Exchange side interface current calculates, and according to 2 active power reference value of transverter and reactive power reference qref, calculates the change of current
2 exchange side interface current reference value of device；
Exchange side interface voltage calculates, and according to the result of calculation that above-mentioned exchange side interface current calculates, calculates transverter 2
The reference value of exchange side output voltage；
Power cell controls, and according to the reference value of 2 exchange side output voltage of transverter, controls in power cell and opens switching off device
Part is opened and is turned off, and the combinations of voltages that power module 1 and power module 2 export is controlled, and makes the synchronization output voltage be respectively
0, capacitance voltage, the power cell 1 of capacitance voltage negative value and the number of power 2 meet exchange side, the ginseng of DC side output voltage
Value is examined, DC voltage is reduced in the case where ensureing that the compensation of series side is unaffected；
Start-up and shut-down control when startup, first starts transverter 1, establishes DC voltage, then unlock transverter 2；Transverter 2 unlocks
Afterwards, the electric current of switch 1 can be made to be gradually reduced by control, line current is gradually transferred on 1 the second side winding of transformer, when
After 1 electric current of switch becomes zero, then switch 1 is disconnected, completes Hybrid power filter and start；When stoppage in transit, first control 1 the second side of transformer around
Group electric current is equal with line current, then closes a switch 1, and then control electric current is gradually transferred to out from 1 the second side winding of transformer
It closes on 1,1 the second side winding current of transformer is latched transverter 2 again after being zero, then exits transverter 1, completes Hybrid power filter and stops
Fortune；
The present invention proposes a kind of control device of Hybrid power filter simultaneously, and the control device of the transverter 1 includes straight
Flow voltage control unit, alternating voltage control unit, Reactive Power Control unit, exchange side interface current computing unit, exchange
Side interface voltage computation unit, power cell control unit, wherein：
The direct-current voltage control unit, DC voltage controller is by direct voltage reference value and dc voltage measurements
Deviation obtains the active power reference value of transverter 1 by controller；The alternating voltage control unit, AC voltage controller
By the deviation of alternating voltage reference value and ac voltage measurement value the reactive power reference qref of transverter 1 is obtained by controller；
The Reactive Power Control unit, reactive power controller are passed through by the deviation of reactive power reference qref and wattless power measurement value
Controller obtains the reactive power reference qref of transverter 1；
The exchange side interface current computing unit, according to 1 active power reference value of transverter and reactive power reference qref,
Calculate 1 exchange side interface current reference value of transverter.
The exchange side interface voltage computing unit is calculated according to the result of calculation that above-mentioned exchange side interface current calculates
Go out the reference value of 1 exchange side output voltage of transverter.
The power cell control unit is controlled according to the reference value of 1 exchange side output voltage of transverter in power cell
The disconnected device of switch is opened and is turned off, and the combinations of voltages that power module 3 and power module 4 export is controlled, and makes synchronization output electricity
Pressure is respectively 0, capacitance voltage, the power cell 3 of capacitance voltage negative value meets exchange side with the number of power 4, DC side exports
The reference value of voltage；
The control device of the transverter 2 includes circuit active power controller unit, circuit Reactive Power Control unit, hands over
Side interface current calculation unit, exchange side interface voltage computing unit, power cell control unit, start-up and shut-down control unit are flowed,
In：
The circuit active power controller unit, according to circuit active power command value and circuit wattful power messurement value
Deviation obtains the active power reference value of transverter 2；
The circuit Reactive Power Control unit, according to circuit reactive power command value and circuit wattless power measurement value
Deviation obtains the reactive power reference qref of transverter 2；
The exchange side interface current computing unit, according to 2 active power reference value of transverter and reactive power reference qref,
Calculate 2 exchange side interface current reference value of transverter；
The exchange side interface voltage computing unit, according to the result of calculation of above-mentioned exchange side interface current computing unit,
Calculate the reference value of 2 exchange side output voltage of transverter；
The power cell control unit is controlled according to the reference value of 2 exchange side output voltage of transverter in power cell
The disconnected device of switch is opened and is turned off, and the combinations of voltages that power module 1 and power module 2 export is controlled, and makes synchronization output electricity
Pressure is respectively 0, capacitance voltage, the power cell 1 of capacitance voltage negative value meets exchange side with the number of power 2, DC side exports
The reference value of voltage reduces DC voltage in the case where ensureing that the compensation of series side is unaffected；
The start-up and shut-down control unit when startup, first starts transverter 1, establishes DC voltage, then unlock transverter 2；The change of current
Device 2 unlock after, can by control so that the electric current of switch 1 is gradually reduced, line current be gradually transferred to 1 the second side of transformer around
In group, after 1 electric current of switch becomes zero, then switch 1 is disconnected, completes Hybrid power filter and start；When stoppage in transit, transformer 1 is first controlled
The second side winding current is equal with line current, then closes a switch 1, then controls electric current gradually from 1 the second side winding of transformer
It is transferred on switch 1,1 the second side winding current of transformer is latched transverter 2 again after being zero, then exits transverter 1, completes mixing
Compensator is stopped transport.
Finally it should be noted that：Only illustrate technical scheme of the present invention rather than its limitations in conjunction with above-described embodiment.Institute
The those of ordinary skill in category field is to be understood that：Those skilled in the art can repair the specific implementation mode of the present invention
Change or equivalent replacement, but these modifications or change are being applied within pending patent requirements protection domain.
Claims (21)
1. a kind of Hybrid power filter, which is characterized in that the Hybrid power filter includes at least transverter 1, transverter 2, transformer
1, switch 1 and reactive-load compensation equipment；Wherein：
The transverter 1 includes exchange side interface and direct current side interface, passes through the exchange side interface incoming transport system；It is described
Reactive-load compensation equipment incoming transport system；The transverter 2 is made of six branch circuits；The first end of branch circuit 1 and point
The first end of branch circuit 2 connects, and tie point is exchange side interface 1；The first end of the first end and branch circuit 4 of branch circuit 3
Connection, tie point are exchange side interface 2；The first end of branch circuit 5 is connected with the first end of branch circuit 6, and tie point is to hand over
Flow side interface 3；The second end of branch circuit 1 is connect with the second end of the second end of branch circuit 3, branch circuit 5, and tie point is made
For DC side anode interface；The second end of branch circuit 2 is connect with the second end of the second end of branch circuit 4, branch circuit 6,
Tie point is as DC side cathode interface；The DC side anode interface of the transverter 1,2, cathode interface are respectively connected with；
The transformer 1 is three-phase transformer, includes at least both sides winding, the exchange side of the first side winding and the transverter 2
Interface connects, the second side windings in series line attachment；The both ends of the second side winding are connected in parallel the switch 1；
There are two types of composition proposals for the branch circuit：
Scheme one：The branch circuit is combined by power cell and reactor is connected in series with and constitutes；The branch circuit 1,3,5
In, the first end of the 1st end of the reactor as the branch circuit, the 2nd end of reactor is combined defeated with power cell
Outlet 1 connects, second end of the output end 2 that power cell combines as the branch circuit；In the branch circuit 2,4,6,
First end of 1st end of the reactor as the branch circuit, the output end that the 2nd end of reactor is combined with power cell
2 connections, second end of the output end 1 that power cell combines as the branch circuit；
Scheme two：The branch circuit is combined by power cell and reactor is connected in series with and constitutes；The branch circuit 1,3,5
In, the first end of the output end 1 of power cell combination as the branch circuit, the output end 2 of power cell combination and
1st end of the reactor connects, the second end of the 2nd end of the reactor as the branch circuit；The branch circuit
2, in 4,6, the output end 2 of power cell combination is the first end of the branch circuit, the output end 1 of power cell combination and institute
State the 1st end connection of reactor, the second end of the 2nd end of the reactor as the branch circuit；
Power cell combination, which is connected in series with by power cell 1 with power cell 2, to be constituted, or all by 2 groups of power cell
At；
The power cell 1 is at least made of turn-off device T1, turn-off device T2 and capacitance C1；One end of the capacitance C1
It is connected with the anode of the turn-off device T1；The other end of the capacitance C1 is connected with the cathode of the turn-off device T2,
Output end 1 as power cell 1；The anode of the turn-off device T2 is connected with the cathode of turn-off device 1, as power
The output end 2 of unit 1；
The power cell 2 at least by turn-off device T3, turn-off device T4, turn-off device T5, turn-off device T6 and
Capacitance C2 is constituted；One end of the capacitance C2 is connected with the anode of the anode of the turn-off device T3, turn-off device T4；Institute
The other end for stating capacitance C2 is connected with the cathode of the cathode of the turn-off device T5, turn-off device T6；It is described can switching off device
The cathode of part T3 is connected with the anode of turn-off device T5, the output end 2 as power cell 2；The turn-off device T4's
Cathode is connected with the anode of turn-off device T6, the output end 1 as power cell 2.
2. a kind of Hybrid power filter according to claim 1, which is characterized in that the power cell combination is by power cell
1 with power cell 2 when being connected in series with composition, and the power cell 1 and power cell 2 in power cell combination are according to arbitrary suitable
Sequence is connected in series with.
3. a kind of Hybrid power filter according to claim 1, which is characterized in that the turn-off device is controllable using one
Switching device or multiple controllable switch devices in series are formed in parallel.
4. a kind of Hybrid power filter according to claim 1, which is characterized in that the turn-off device packet of the power cell
It includes but is not limited to：IGBT、IGCT、MOSFET、GTO.
5. a kind of Hybrid power filter circuit according to claim 4, which is characterized in that the turn-off device uses IGBT
When, it is described that just extremely its collector, the cathode are its emitter；The turn-off device use IGCT or GTO when, it is described just
Extremely its anode, the cathode are its cathode；When the turn-off device uses MOSFET, described just extremely it drains, described
Cathode is its source electrode.
6. a kind of Hybrid power filter according to claim 1, which is characterized in that the transverter 1 is accessed through transformer 2 and handed over
Streaming system, the transformer 2 are three-phase transformer, include at least transverter 1 described in the winding of both sides and exchange side interface and the change
2 first side winding of depressor is connected, 2 the second side winding parallel incoming transport system of the transformer.
7. a kind of Hybrid power filter circuit according to claim 6, which is characterized in that connect in 1 exchange side of the transverter
The resistance and switching device being connected in parallel are configured between mouth and AC system, switching device includes but not limited to disconnecting link and switch.
8. a kind of Hybrid power filter according to claim 1, which is characterized in that the transverter 1 is the voltage-source type change of current
Device, including but not limited to：Two level, three level, transformer multiple inverter configuration and modular multilevel structure.
9. a kind of Hybrid power filter circuit according to claim 1, which is characterized in that the transverter 1 includes but unlimited
In：The uncontrollable rectifier bridge of thyristor converter device, diode composition.
10. a kind of Hybrid power filter circuit according to claim 1, which is characterized in that the reactive-load compensator include but
It is not limited to：Fixed capacitor, by the capacitor of mechanical switch or thyristor switch switching, can switching subdivided capacitor group,
SVC static passive compensation devices.
11. a kind of Hybrid power filter according to claim 1, which is characterized in that 1 the second side winding of the transformer with
Series connection access compensation device 1 between the circuit.
12. a kind of Hybrid power filter according to claim 1, which is characterized in that 1 first side winding of the transformer with
The transverter 2 exchanges series connection access compensation device 2 between side interface.
13. a kind of Hybrid power filter according to claim 11, which is characterized in that the compensation device 1 is by reactor group
It is connected in parallel with switching device, the reactor group is connected in series with by least one reactor, and the switching device includes but not
It is limited to mechanical switch, the switch that power electronic devices is constituted.
14. a kind of Hybrid power filter according to claim 12, which is characterized in that the compensation device 2 is by reactor group
It is connected in parallel with switching device, the reactor group is connected in series with by least one reactor, and the switching device includes but not
It is limited to mechanical switch, the switch that power electronic devices is constituted.
15. a kind of Hybrid power filter according to claim 1, which is characterized in that in 1 first side winding two of the transformer
End is connected in parallel bypass switch arrangement, and the bypass switch arrangement includes but not limited to mechanical switch, power electronic devices composition
Switch.
16. a kind of Hybrid power filter according to claim 1, which is characterized in that 1 first side winding of the transformer uses
Star-star connection mode or delta connection mode.
17. a kind of Hybrid power filter according to claim 16, which is characterized in that 1 first side winding of the transformer is adopted
With star-star connection mode, neutral-point solid ground or resistance grounded；The transformer 1 includes third side winding, and described the
Three side windings use delta connection.
18. a kind of control method of Hybrid power filter according to claim 1, which is characterized in that
2 primary method of control of the transverter is as follows：
Circuit active power controller, circuit Active Power Controller is by circuit active power command value and circuit wattful power messurement
The deviation of value obtains the active power reference value of transverter 2 by controller；
Circuit Reactive Power Control, circuit reactive power controller is by circuit reactive power command value and circuit wattless power measurement
The deviation of value obtains the reactive power reference qref of transverter 2 by controller；
Exchange side interface current calculates, and according to 2 active power reference value of transverter and reactive power reference qref, calculates transverter 2
Exchange side interface current reference value；
Exchange side interface voltage calculates, and according to the result of calculation that above-mentioned exchange side interface current calculates, calculates the exchange of transverter 2
The reference value of side output voltage；
Power cell controls, and according to the reference value of 2 exchange side output voltage of transverter, controls the disconnected device of switch in power cell and opens
Logical and shutdown controls the combinations of voltages that power module 1 and power module 2 export, and it is respectively 0, electricity to make synchronization output voltage
Hold voltage, the power cell 1 of capacitance voltage negative value and the number of power 2 and meet exchange side, the reference value of DC side output voltage,
DC voltage is reduced in the case where ensureing that the compensation of series side is unaffected.
19. a kind of control method of Hybrid power filter according to claim 18, which is characterized in that the control method is also
Including start-up and shut-down control, when startup, first starts transverter 1, establish DC voltage, then unlock transverter 2；It, can after transverter 2 unlocks
To make the electric current of switch 1 be gradually reduced by control, line current is gradually transferred on 1 the second side winding of transformer, when switch 1
After electric current becomes zero, then switch 1 is disconnected, completes Hybrid power filter and start；When stoppage in transit, 1 the second side winding electricity of transformer is first controlled
Stream is equal with line current, then closes a switch 1, and then control electric current is gradually transferred to switch 1 from 1 the second side winding of transformer
On, 1 the second side winding current of transformer is latched transverter 2 again after being zero, then exits transverter 1, completes Hybrid power filter and stops transport.
20. a kind of control device of Hybrid power filter according to claim 1, which is characterized in that
The control device includes circuit active power controller unit, circuit Reactive Power Control unit, exchange side interface current
Computing unit, exchange side interface voltage computing unit, power cell control unit, wherein：
The circuit active power controller unit, according to the deviation of circuit active power command value and circuit wattful power messurement value
Obtain the active power reference value of transverter 2；
The circuit Reactive Power Control unit, according to the deviation of circuit reactive power command value and circuit wattless power measurement value
Obtain the reactive power reference qref of transverter 2；
The exchange side interface current computing unit is calculated according to 2 active power reference value of transverter and reactive power reference qref
2 exchange side interface current reference value of transverter；
The exchange side interface voltage computing unit is calculated according to the result of calculation of above-mentioned exchange side interface current computing unit
Go out the reference value of 2 exchange side output voltage of transverter；
The power cell control unit is controlled and is switched in power cell according to the reference value of 2 exchange side output voltage of transverter
Disconnected device is opened and is turned off, and is controlled the combinations of voltages that power module 1 and power module 2 export, is made synchronization output voltage point
Not Wei 0, capacitance voltage, the power cell 1 of capacitance voltage negative value and the number of power 2 meet exchange side, DC side output voltage
Reference value, ensure series side compensation it is unaffected in the case of reduce DC voltage.
21. a kind of control device of Hybrid power filter according to claim 20, which is characterized in that the control device is also
Including start-up and shut-down control unit：
The start-up and shut-down control unit when startup, first starts transverter 1, establishes DC voltage, then unlock transverter 2；Transverter 2
After unlock, the electric current of switch 1 can be made to be gradually reduced by control, line current is gradually transferred to 1 the second side winding of transformer
On, after 1 electric current of switch becomes zero, then switch 1 is disconnected, completes Hybrid power filter and start；When stoppage in transit, transformer 1 the is first controlled
Two side winding currents are equal with line current, then close a switch 1, then control electric current and gradually turn from 1 the second side winding of transformer
It moves on switch 1,1 the second side winding current of transformer is latched transverter 2 again after being zero, then exits transverter 1, completes mixing and mends
Repay device stoppage in transit.
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810519409.2A CN108521126B (en) | 2018-05-28 | 2018-05-28 | Hybrid compensator and control method and device thereof |
| BR112020024313-2A BR112020024313A2 (en) | 2018-05-28 | 2019-03-21 | compensator, control method and respective device |
| RU2020142608A RU2762792C1 (en) | 2018-05-28 | 2019-03-21 | Compensator, as well as method and device for its control |
| EP19811344.1A EP3787142A4 (en) | 2018-05-28 | 2019-03-21 | Compensator, control method and device therefor |
| PCT/CN2019/079078 WO2019228028A1 (en) | 2018-05-28 | 2019-03-21 | Compensator, control method and device therefor |
| JP2020566554A JP7089602B2 (en) | 2018-05-28 | 2019-03-21 | Compensator and its control method and equipment |
| US17/059,879 US20210226449A1 (en) | 2018-05-28 | 2019-03-21 | Compensator, Control Method and Device Therefor |
| KR1020207037074A KR102490765B1 (en) | 2018-05-28 | 2019-03-21 | Compensator and its control method and device |
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| CN110137977A (en) * | 2019-06-04 | 2019-08-16 | 南京南瑞继保电气有限公司 | Converter station regulation of series system and control method |
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