CN206471841U - Electric energy router and micro-capacitance sensor structure - Google Patents
Electric energy router and micro-capacitance sensor structure Download PDFInfo
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- CN206471841U CN206471841U CN201621480680.2U CN201621480680U CN206471841U CN 206471841 U CN206471841 U CN 206471841U CN 201621480680 U CN201621480680 U CN 201621480680U CN 206471841 U CN206471841 U CN 206471841U
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Abstract
The utility model provides a kind of electric energy router and micro-capacitance sensor structure, and electric energy router includes three-phase branch road；Include a whole bridge arm circuit respectively per phase branch road, each whole bridge arm circuit includes bridge arm circuit and lower bridge arm circuit, upper bridge arm circuit and lower bridge arm circuit are composed in series by N number of half-bridge module and a bridge arm inductance respectively, and the DC side output voltage terminal of each half-bridge module is the low-voltage direct end of electric energy router；Electric energy router also includes modulation transformer, and the bridge arm midpoint of modulation transformer input and three-phase is connected, and modulation transformer output end is the three-phase alternating current end of electric energy router；The public direct-current side output voltage terminal of three-phase branch road rectifying bridge arm is the HVDC end of electric energy router.The electric energy router that the utility model is provided has modularization, and scalability is high, the tradable advantage of energy between HVDC, low-voltage direct and exchange, and comes with three-phase alternating current, HVDC and low-voltage direct end, is adapted to communication micro-capacitance sensor power applications.
Description
Technical field
The utility model is related to powder technology field, and in particular to a kind of electric energy router and micro-capacitance sensor structure.
Background technology
With the development of 4G technologies, data communication and Internet service, communication equipment is required increasingly power supply reliability
Height, the power consumption also communication service such as remote ultra-traditional exchange, transmission.Because communication core office power consumption is big, to improve power supply capacity
And antijamming capability, and facilitating unit of operation's management service, communication power supply power supply-distribution system is generally supplied using the concentration shown in Fig. 1
Electrically, the concentrated setting high-low pressure changed into switchhouse in communication core office, by high voltage power distributing cabinet, power transformer by 10kV
Convert alternating current is pressed to 380V/220V low-voltage ACs, then the different computer room buildings or same for being distributed electric energy by low-voltage distribution cabinet
One computer room building difference floor, the power battery room in region, switchgear house powering load.
Power battery room voltage system block diagram as shown in Fig. 2 including A.C. distribution box, AC distribution panel, DC distributor,
The power-supply devices such as ups power, -48V Switching Power Supplies, 336V high-voltage DC power supplies, batteries, according to power supply of different loads etc.
Level and power supply requirement, to low-voltage direct, HVDC, exchange traffic load, power ＆ environment supervision system, architectural lighting, disappear
The building load such as anti-intellectuality, other AC loads such as air-conditioning and ventilation system are powered.
From the above description, current communication core office's power type is exchanged including 380V/220V, -48V low-voltage directs
With three kinds of 336V HVDCs, converted step by step since 10kV using tree dry construction, distribute electric energy, 380V/220V exchanges city
On being between the Communication Power Equipment such as electricity and high-voltage direct current switch power supply, low-voltage direct Switching Power Supply, batteries, ups power
Downstream relationship, electric energy from electric main to Communication Power Equipment again to loaded single phase flow, variety classes Communication Power Equipment it
Between incompatible and energy can not exchange.Communication power distribution network be operated in potentiostatic mode there is provided 380/220V exchange, -48V direct currents and
Three voltage bus of 336V direct currents, power is determined by load, it is impossible to active control.According to existing communication core office power supply-distribution system
Technical scheme is described, and can obtain current communication core office power distribution network topological structure as shown in Figure 3, it is seen that this trunk formula multi-stage transformation
Communication distribution network it is complicated, power type and power supply unit is various, system complex.
Utility model content
For defect of the prior art, the utility model provides a kind of electric energy router and micro-capacitance sensor structure, this practicality
The electric energy router of new offer has modularization, and scalability is high, and energy can be handed between HVDC, low-voltage direct and exchange
The advantage changed, and three-phase alternating current, HVDC and low-voltage direct end are come with, it is adapted to communication micro-capacitance sensor power applications.
In order to solve the above technical problems, the utility model provides following technical scheme：
In a first aspect, the utility model provides a kind of electric energy router, including：Low-voltage direct end, three-phase alternating current end, height
Press DC terminal and three-phase branch road；Wherein, a whole bridge arm circuit is included respectively per phase branch road, each whole bridge arm circuit includes
One upper bridge arm circuit and a lower bridge arm circuit, upper bridge arm circuit are gone here and there successively by N number of half-bridge module and a upper bridge arm inductance
Joint group is into lower bridge arm circuit is sequentially connected in series by lower a bridge arm inductance and N number of half-bridge module, upper bridge arm inductance and lower bridge arm
Inductance is directly connected to and the tie point between upper bridge arm inductance and lower bridge arm inductance is referred to as bridge arm midpoint；
Wherein, each half-bridge module includes a half-bridge structure and the low tension battery group positioned at DC side；Each half
The DC voltage of bridge module is U* SM, the DC side output voltage terminal of each half-bridge module is the low-voltage direct of electric energy router
End；
Wherein, each half-bridge structure is made up of two IGBT pipes being vertically connected with, when IGBT above manages open-minded, position
When the IGBT pipes shut-off of lower section, the exchange end output voltage U of half-bridge module corresponding with the half-bridge structureab=U* SM；When positioned at
The IGBT pipes shut-off of top, when underlying IGBT pipes are opened, the exchange end of half-bridge module corresponding with the half-bridge structure is defeated
Go out voltage for Uab=0；Per phase branch road by controlling the break-make of two IGBT pipes in each half-bridge module to realize that whole bridge arm exports electricity
Press UarmFrom 0~N*U* SMBetween stepped change；The electric energy router also include modulation transformer, the modulation transformer it is defeated
Enter end to be connected with the bridge arm midpoint of three-phase, the output end of the modulation transformer is the three-phase alternating current end of the electric energy router；
The public direct-current side output voltage terminal of three-phase branch road rectifying bridge arm is the HVDC end of electric energy router.
Further, the DC side of the half-bridge module is additionally provided with Support Capacitor.
Further, upper bridge arm inductance is identical with the inductance value of lower bridge arm inductance.
Further, the output voltage at the three-phase alternating current end of the electric energy router is：Ucabc=MUdc cosω0t；
Wherein, UcabcFor the output voltage at the three-phase alternating current end of electric energy router, M is the modulation of the modulation transformer
Than ω0T is the phase modulation of the modulation transformer, UdcFor the whole bridge arm output voltage of every phase branch road.
Further, the N is 6.
Further, the DC voltage U of each half-bridge module* SMFor 60V.
Second aspect, present invention also offers a kind of micro-capacitance sensor structure, including：380V/220V ac bus, 336V direct currents
Bus, -48V dc bus and at least one electric energy router as described above；
Wherein, the three-phase alternating current end connection of the 380V/220V ac bus and electric energy router, the 336V direct currents are female
The low-voltage direct end of the HVDC end connection of line and the electric energy router, -48V dc bus and electric energy router is connected.
Further, the micro-capacitance sensor structure also includes：Two-way AC and DC power electronic converter and bidirectional, dc conversion
Device；
The two-way AC and DC power electronic converter connects with 380V/220V ac bus and 336V dc bus respectively
Connect；
The two-way DC converter is connected with 336V dc bus and -48V dc bus respectively.
Further, the micro-capacitance sensor structure also includes：Electric main AM access module, diesel generating set module, exchange
Load blocks, HVDC load blocks, 336V batteries module, low-voltage direct load blocks and -48V batteries moulds
Block；
The electric main AM access module, the diesel generating set module, the AC load module are exchanged with 380V
Bus is connected；
The HVDC load blocks and the 336V batteries module are connected with 336V dc bus；
The low-voltage direct load blocks and the -48V batteries module are connected with -48V dc bus.
Further, the micro-capacitance sensor structure also includes：Photovoltaic power supply module and wind power supply module, the photovoltaic power supply
Module and wind power supply module are connected with 336V dc bus.
As shown from the above technical solution, the electric energy router that the utility model is provided has modularization, and scalability is high, high
The tradable advantage of energy between straightening stream, low-voltage direct and exchange, and come with three-phase alternating current, HVDC and low-pressure direct
End is flowed, is adapted to communication micro-capacitance sensor power applications.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the accompanying drawing used required in description of the prior art is briefly described, it should be apparent that, drawings in the following description are these
Some embodiments of utility model, for those of ordinary skill in the art, on the premise of not paying creative work, also
Other accompanying drawings can be obtained according to these accompanying drawings.
Fig. 1 be in the prior art communication core office power distribution network centralized power supply system schematic diagram；
Fig. 2 is power battery room voltage system block diagram in the prior art；
Fig. 3 be in the prior art communication core office power distribution network topological structure；
Fig. 4 is the structural representation for the electric energy router that one embodiment of the invention is provided；
Fig. 5 is the electric energy router one phase equivalent circuit that one embodiment of the invention is provided；
Fig. 6 is the electric energy router one phase equivalent model schematic that one embodiment of the invention is provided；
Fig. 7 a are the electric energy router AC control system architecture schematic diagrams that one embodiment of the invention is provided；
Fig. 7 b are the electric energy router ac-side current ring equivalent control block diagrams that one embodiment of the invention is provided；
Fig. 8 is the half-bridge module average voltage control block diagram that one embodiment of the invention is provided；
Fig. 9 is the half-bridge module voltage balancing control block diagram that one embodiment of the invention is provided；
Figure 10 is the structural representation of the micro-capacitance sensor structure based on electric energy router networking；
Figure 11 is the functional block diagram of the communication core office micro-capacitance sensor structure based on electric energy router networking；
Figure 12 is the feedback control block diagram of electric energy router in micro-capacitance sensor structure.
Embodiment
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Accompanying drawing in type embodiment, clear, complete description is carried out to the technical scheme in the utility model embodiment, it is clear that retouched
The embodiment stated is a part of embodiment of the utility model, rather than whole embodiments.Based on the implementation in the utility model
Example, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made is belonged to
The scope of the utility model protection.
The utility model one embodiment provides a kind of electric energy router, referring to shown in Fig. 4 (by taking N=6 as an example)
Electric energy router structural representation, the electric energy router includes：Low-voltage direct end (2), three-phase alternating current end (1), HVDC end
And three-phase branch road (3)；Wherein, a whole bridge arm circuit is included respectively per phase branch road, each whole bridge arm circuit includes one
Upper bridge arm circuit and a lower bridge arm circuit, upper bridge arm circuit is by N=half-bridge module SM and a upper bridge arm inductance LrSuccessively
It is composed in series, lower bridge arm circuit is by a lower bridge arm inductance LrBe sequentially connected in series with N number of half-bridge module SM, upper bridge arm inductance with
Lower bridge arm inductance is directly connected to and the tie point between upper bridge arm inductance and lower bridge arm inductance be referred to as A in bridge arm midpoint, such as figure,
B and C points；
Wherein, each half-bridge module SM includes a half-bridge structure and the low tension battery group positioned at DC side；Each
The DC voltage of half-bridge module is U* SM, the DC side output voltage terminal of each half-bridge module is the low-pressure direct of electric energy router
Flow end；
Wherein, each half-bridge structure manages (pipe S by two IGBT being vertically connected with1, pipe S2) composition, when pipe above
S1It is open-minded, underlying pipe S2During shut-off, half-bridge module SM is connected among bridge arm, and electric current flows through DC side battery, now
Half-bridge module exchange end ab output voltages are Uab=U* SM；As pipe S above1Shut-off, underlying pipe S2When opening,
Half-bridge module SM is bypassed, and now half-bridge module exchange end output voltage is Uab=0；Per phase branch road by controlling each half-bridge mould
The break-make of two IGBT pipes realizes whole bridge arm output voltage U in blockarmFrom 0~N*U* SMBetween stepped change；
The electric energy router also includes modulation transformer, the input of the modulation transformer and the bridge arm midpoint of three-phase
Connection, the output end of the modulation transformer is the three-phase alternating current end of the electric energy router；The public affairs of three-phase branch road rectifying bridge arm
DC side output voltage terminal is the HVDC end of electric energy router altogether.
Referring to Fig. 4, the voltage of half-bridge module exchange end output passes through bridge arm inductance LrAfter filtering, each bridge arm output voltage
Fundamental wave can be equivalent to a controlled voltage source, control upper and lower bridge arm output voltage by default modulator approach, and then control three
Phase bridge arm midpoint output AC voltage Ucabc=2UcABC, transformer action is matched level, and filters out AC output current
Harmonic wave.The SM module numbers that two bridge arms seal in circuit above and below each phase mutually in the same time, are being controlled to be N, then public HVDC is female
Line voltage remains at Udc=NU* SM。
To meet communication core office micro-capacitance sensor application demand, using electric energy router (1) (2) (3) terminal as communication
The micro-capacitance sensor 380V exchanges of core office, -48V low-voltage directs and 336V high voltage dc bus.In view of communication need for electricity, circuit pressure
The SM module number N=6, submodule voltage U of each bridge arm are made in drop and actual cell voltage, the present embodiment* SM=60V, it is public
DC bus-bar voltage is in Udc=NU* SM=360V.Opened using each SM modules inside phase-shifting carrier wave modulator approach control electric energy router
Work is closed, if the modulated signal modulation ratio of modulation transformer is M, phase is ω0T, then AC fundamental voltage output of voltage control is closed
System is as the following formula shown in one.By adjusting modulation ratio and phase, control ac terminal exports the 380V exchange synchronous with civil power,
Meet grid-connected and AC Power Control demand.By controlling the on off state of pipe in SM modules, adjustment seals in the SM of circuit
The quantity of module, and the exchange of AC, submodule DC side and public direct-current side energy can be realized.
In a kind of optional embodiment, the DC side of the half-bridge module is additionally provided with Support Capacitor.Work as actual circuit
When circuit is longer, the Support Capacitor can play a part of supporting voltage, and it is cheaply many for battery.
In a kind of optional embodiment, upper bridge arm inductance is identical with the inductance value of lower bridge arm inductance.
Understand from the description above, the electric energy router that the utility model is provided includes exchange 380V/220V, -48V low pressure
Three buses of direct current and 336V HVDCs, it is possible to achieve voltage transformation between different buses, improve various power supplys, load compatibility
Property.
Understand from the description above, the electric energy router that the utility model is provided has modularization, scalability is high, high pressure
The tradable advantage of energy between direct current, low-voltage direct and exchange, and come with three-phase alternating current, HVDC and low-voltage direct
End, is adapted to communication micro-capacitance sensor power applications.
For above example offer based on modular multi-level converter MMC electric energy routers, its friendship is given below
Flow side mathematical modeling and a kind of specific control method.
MMC electric energy router number sequences model mainly includes exchange output model and DC side model.Explained according to above-mentioned principle
State, transformer influence is ignored first, low-pressure side output voltage U is only consideredcABC, then MMC electric energy routers one phase equivalent circuit is such as
Shown in Fig. 5, U in figureX (x=a, b, c)For civil power three-phase alternating voltage, iX (x=a, b, c)For alternating current, every phase bridge arm submodule number
For N=6, the upper and lower bridge arm output voltage of three-phase is respectively UPx (x=a, b, c)And UNx (x=a, b, c), upper and lower bridge arm electric current is respectively
iX (x=a, b, c) pAnd iX (x=a, b, c) n, equivalent neutral point is n.
It is bridge arm electricity that can respectively obtain R in formula two and formula three, formula according to kirchhoffs law
Feel equivalent resistance.
ipx-inx=ixFormula three
Formula two and formula three are arranged, the alternating current equivalent model that can obtain MMC electric energy routers is
Its bridge arm output voltage is：
Wherein, AC model one phase equivalent circuit is as shown in Figure 6.
Electric energy router alternating current equivalent model equation group is multiplied by transformation matrix shown in formula six, rotational coordinates is synchronized
Conversion, i.e. dq conversion, and carry out that electric energy router equivalent model such as formula under synchronously rotating reference frame can be obtained after Laplace transform
Shown in seven.
MMC electric energy router ACs control methods is designed as shown in Figure 7a according to formula seven, controller set decoupling and
Simplify control block diagram is as shown in Figure 7b after the link that feedovers, it is seen that active and reactive separate, and plant model is identical, because
This controller can use identical structure.Wherein Gid、GiqRespectively d, q shaft current controller, electric energy router is in active work(
When rate controls mode of operation, according to microgrid energy dispatching requirement, active and referenced reactive current I is givendref、Iqref, you can it is real
The active control of existing power；When not needing power active control, dq coordinates are converted into after feedback router AC output voltage
Voltage feedback signal U under systemcd, by itself and voltage instruction UcdrefAfter being compared, using voltage controller GudIt is converted into electric current
Control instruction, you can reach the control purpose of stable ac bus voltage.
For above example offer based on modular multi-level converter MMC electric energy routers, its is given below straight
Flow side mathematical modeling and a kind of specific control method.
When MMC electric energy routers work, the submodule quantity that two bridge arms seal in circuit above and below same phase is fixed, public straight
It is U to flow busbar voltage weighing apparatusdc=NU* SMAs long as control submodule voltage is in setting value, and public direct-current side voltage, which can also be maintained, to be set
Definite value, therefore router DC side control design case is the submodule average voltage control for representing DC side global voltage and different sons
The balance control of module voltage.
Submodule average voltage control block diagram is as shown in Figure 8.Control system includes voltage and controlled in outer shroud and current control
Ring, wherein U* SMFor the setting value of submodule voltage,For the average value of a certain phase upper and lower bridge arm submodule voltage.Due to son
The average value of module voltage has direct relation with flowing through the circulation size of two bridge arms above and below same phase, and circulation is defined as izx=1/2
(ipx+inx), the error of the average value of submodule voltage and setting voltage is passed through a PI controllers G by x=a, b, cPI(s) it is defeated
Go out to obtain circulation instruction i* zx, with circulation actual value izxMake poor, its error input current inner ring proportional controller GP1(s), UAxFor
The average voltage control instruction being added to above each submodule.G1avAnd G (s)2av(s) it is respectively current inner loop and outer voltage
Ssystem transfer function, can be pushed away according to circulation loop-voltage equation, MMC electric energy router output voltage relations and the conservation of energy
To obtaining transmission function expression formula as shown in formula eight and formula nine, wherein N=6.PI and ratio are designed according to closed-loop control block diagram
Csr controller, makes submodule average voltage maintain calibration value 60V, you can the public direct-current of terminal will be exported as HVDC
Busbar voltage maintains 360V, meets HVDC traffic load power demands；Required according to power output, finely tune reference voltage
U* SM, you can realize the active control function of HVDC side energy, such as discharge and recharge of HVDC side batteries, electric main
DC side inversion is powered during power-off.
Submodule voltage balancing control block diagram is as shown in figure 9, USMj, j=1~6For each submodule DC voltage in certain bridge arm,
GP2(s) it is proportional balancing method controller, UBjTo be input to the balanced voltage control signal of each submodule, G3in(s) it is balance control
The transmission function of link processed, its expression formula can be shifted onto as shown in formula ten by being put down according to submodule alternating current-direct current side power.
Submodule voltage balancing control and the control of submodule average voltage are relatively independent, meet principle of stacking, feed back submodule
The error that block voltage is compared with voltage setting value, after proportional controller is adjusted, produces balanced voltage control signal, superposition
To average voltage control instruction, so as to realize submodule voltage balancing control purpose.Control common DC bus voltage is maintained at
In the case of calibration value, the submodule balance of voltage can ensure the stabilization of submodule voltage, meet the confession of low-voltage direct traffic load
Electric demand.In the case of normal communication mains-supplied, submodule batteries are in floating charge state in parallel, and load energy is mainly by city
Electricity provide, batteries on the one hand be used as wave filter on DC side, it is ensured that direct current supply quality, on the other hand, in city electro-mechanical wave or
During flickering, by the router inversion work compensation idle harmonic of AC, so that stable AC voltage, improves power supply matter
Amount；When civil power is powered off, DC side batteries ensure continued power, and are worked by router inversion, can be by direct current energy
Amount is converted to AC energy, is powered to AC load, it is ensured that AC is powered stably.
Another embodiment of the utility model provides a kind of micro-capacitance sensor structure, and referring to Figure 10, the micro-capacitance sensor structure includes：
380V/220V ac bus, 336V dc bus, -48V dc bus and at least one electric energy as described in above example
Router；
Wherein, the three-phase alternating current end connection of the 380V/220V ac bus and electric energy router, the 336V direct currents are female
The low-voltage direct end of the HVDC end connection of line and the electric energy router, -48V dc bus and electric energy router is connected.
In a kind of optional embodiment, the micro-capacitance sensor structure also includes：Two-way AC and DC power electronic converter and
Two-way DC converter；
The two-way AC and DC power electronic converter connects with 380V/220V ac bus and 336V dc bus respectively
Connect；
The two-way DC converter is connected with 336V dc bus and -48V dc bus respectively.
In a kind of optional embodiment, the micro-capacitance sensor structure also includes：Electric main AM access module, diesel-driven generator
Group module, AC load module, HVDC load blocks, 336V batteries module, low-voltage direct load blocks and -48V
Batteries module；Wherein, the electric main AM access module, the diesel generating set module, the AC load module
It is connected with 380V ac bus；The HVDC load blocks and the 336V batteries module connect with 336V dc bus
Connect；The low-voltage direct load blocks and the -48V batteries module are connected with -48V dc bus.
In a kind of optional embodiment, the micro-capacitance sensor structure also includes：Photovoltaic power supply module and wind power supply module,
The photovoltaic power supply module and wind power supply module are connected with 336V dc bus.
Communication core office micro-capacitance sensor structure based on electric energy router networking as shown in Figure 10, is produced using electric energy router
380V/220V ac bus, and 336V and -48V dc bus, design select the bus of sufficiently large current-carrying capacity, later stage initial stage
During load increase, only need to increase electric energy router and corresponding switchboard can meet dilatation demand.Because electric energy router has
3 kinds of power type interfaces in communication core office power distribution network, can save the transformation of electrical energy equipment such as a large amount of Switching Power Supplies, rectifier,
Simplify network, reduction loss and investment O＆M cost；In addition, energy can be swapped between different electrical power, therefore each bus
Upper power-supply device can backup each other, and can effectively improve power-supply device utilization rate, a large amount of reduction identical type power supply backups, and
And ups power is according to circumstances saved, -48V batteries are low due to voltage, and electric current is big, and cable consumption is more, can also save, but
It is for reduction pressure drop, powers nearby, it is ensured that reliability, can also retains；Because electric energy router has busbar voltage and active
Energy control function, therefore the new energy power-supply device such as solar energy power generating, wind-power electricity generation access respective bus bars, by electric energy road
By device internal controller as collaborative controller be can be achieved new energy network, it is not necessary to change original power-supply device；Civil power draws
Enter in addition to original electric main, 336V buses are accessed after can also DC transmission system be depressured through DC converter equipment, according to
Economic indicator flexibly selects AC or DC civil power to introduce, and reduces electric cost.
As seen from the above description, the communication micro-capacitance sensor set up using electric energy router can realize power between different buses
Active control, improve power network controllability, flexibility and improve, realize that electric energy is accurately controlled, improve the quality of power supply.In addition, using
Electric energy router is managed to the various distributed power sources in power network and load, it is possible to reduce electrical energy changer quantity and electricity
Buckling changes series, simplifies power supply-distribution system, the investment of reduction communication power supply, construction, maintenance cost reduce loss.Further, by
Energy can be exchanged between different electrical power system, be backuped each other, thus can improve power-supply device utilization rate and power network power supply capacity,
Reliability, scalability, reduce equipment investment.Further, net level control is carried out to communication micro-capacitance sensor using electric energy router,
Various loads and power-supply device Collaborative Control, improve electric network fault disposal ability.Further, busbar voltage compatibility and power
Flexibility is controlled, the new energy such as photovoltaic, wind-powered electricity generation access technology, high voltage dc transmission technology is introduced cost reduction, according to economy
Index flexibly selects AC or DC civil power to introduce, and reduces electric cost.
The functional block diagram of communication core based on electric energy router networking office micro-capacitance sensor structure shown in Figure 11, electric energy
Router is to integrate a variety of distributed power sources and energy-storage units, and makes it with power distribution network cooperation, powers to the load jointly
Intelligent electrical connection arrangement.Communicate alternating current-direct current mixing micro-capacitance sensor include 380V/220V ac bus, and 336V and -48V it is straight
Bus is flowed, wherein alternating current 220V bus is obtained by drawing 380V midpoints, therefore electric energy router should include above-mentioned several forms
Electric interfaces, and to meet a variety of flow directions of power, electric energy router should contain two-way AC and DC power electronic converter and
Two-way DC converter, it can thus be concluded that functional block diagram is as shown in figure 11.(1), (2), (3) in Figure 11 be respectively 380V exchange ,-
48V direct currents, 336V dc bus, (4), (5) are two-way exchange/direct current (AC/DC) and bidirectional, dc/direct current (DC/DC) respectively
Electronic power convertor, (6) are electric energy router control unit, (7) grid-connected switch.Dashed box equipment is using electric energy road in Figure 11
The novel power supply equipment (direct-flow distribution system, photovoltaic generation, wind-power electricity generation) that can be introduced after device, or can simplify no longer
The existing power supply equipment (ups power, -48V batteries) of configuration.Three bus electricity are fed back by control unit internal sensor
Piezoelectricity stream information, and progress is instructed according to the electric energy router mode of operation of setting, busbar voltage parameter, electric current and power dispatching
Calculate, produce and meet two-way AC/DC, DC/DC converter work of driving pulse control that control is required, realize stable bus electricity
The function of the active and idle flowing between each bar bus is pressed, controls, while control unit monitoring AC and DC power network, electric energy road
By device body and grid power source, the working condition of load equipment, certain node exception or during failure in power network passes through and controls route
Device is active and reactive or is fixed a breakdown to the transmission linkage instruction of grid power source equipment, and electric network fault disconnects grid-connected open when can not exclude
Close isolated fault, it is ensured that the safe operation of communication core office micro-capacitance sensor.
The feedback control block diagram of electric energy router in micro-capacitance sensor structure shown in Figure 12.Each terminal of electric energy router is simultaneously
It is connected in respective bus bars, wherein -48V dc bus is N bars independence bus corresponding with submodule quantity, control circuit is from three
Voltage bus feedback communication side terminal three-phase voltage Ucabc, electric current Icabc, common DC bus voltage Udc, electric current Idc, each submodule
Block DC voltage signal USMxyj, (x=a, b, c；Y=p, n；After j=1~6), by signal condition and coordinate transform generation
Each control signal needed in control method is stated, controller is sent into after feedback control signal and command signal are compared, is controlled
Device processed calculates the drive signal for producing the work of electric energy router main circuit, and electric energy router main circuit is according to voltage stabilizing, active energy
The sets targets such as control control the flowing of energy between three buses, and satisfaction is attempted by the power demands loaded on each bus and power supply
The access demand of equipment.
It can be seen that, the micro-capacitance sensor structure that the present embodiment is provided can solve problems with present in prior art：Different electricity
It is incompatible, it is necessary to which a large amount of electrical energy changers, cause via net loss big between source and electrical equipment；Energy between variety classes power supply
Amount can not be exchanged, to ensure communication reliability, and all kinds of power supplys, each supply node need to design stand-by unit, cause equipment profit
It is not high with rate, and investment is high, system is lengthy and jumbled；Power distribution network works in potentiostatic mode, and grid power is determined that open loop works not by load
Energy active control, dispatching flexibility is low, and trouble point can only be passively cut off during node failure；Electric network fault point is more, and O＆M cost is high,
Poor reliability.Existing power distribution network is in large scale, and the interface of variety classes power supply is incompatible, and energy single-phase flow causes 336V
New energy resources systems such as high-voltage direct current (DC) power system, photovoltaic, wind-powered electricity generation etc. help to respond the emerging of national energy-saving emission reduction strategic objective
The application of power technology needs a large amount of pre-verification work, and equipment, which networks, needs converter unit interface, and investment and O＆M cost increase
Plus, promote resistance big.
The micro-capacitance sensor structure that the present embodiment is provided, employs the electric energy router described in above-described embodiment, simplifies existing
Power distribution network, save equipment investment and O＆M cost, reduce network loss；Realize variety classes power supply interconnection and can tube
Reason.In addition, the micro-capacitance sensor structure that the present embodiment is provided realizes active power control, improve system flexibility, reliability and can expand
Malleability.Further, the micro-capacitance sensor structure that the present embodiment is provided improves new technology and existing power supply equipment compatibility, saves
The cost of investment that technology upgrading is brought.
Compared with prior art, the utility model devises MMC electric energy road for communication core office power distribution network power demands
By device, voltage transformation and energy exchange between different buses can be realized using MMC electric energy routers, by it to each in power network
Plant distributed power source and load is managed, it is possible to reduce electrical energy changer, simplify power supply-distribution system, reduction communication power supply is thrown
Money, construction, maintenance cost, reduce loss；Improve power network controllability, flexibility to improve, realize that electric energy is accurately controlled；Different electrical power
Energy can be exchanged between system, be backuped each other, and improve power-supply device utilization rate and power network power supply capacity, reliability, expansible
Property, equipment investment is reduced, is flexibly selected AC or DC civil power to introduce according to economic indicator, electric cost is reduced；Compatible photovoltaic,
The new energy such as wind-powered electricity generation access technology, HVDC technology, drop etc. New technical use cost.
Above example is merely to illustrate the technical solution of the utility model, rather than its limitations；Although with reference to foregoing reality
Example is applied the utility model is described in detail, it will be understood by those within the art that：It still can be to preceding
State the technical scheme described in each embodiment to modify, or equivalent substitution is carried out to which part technical characteristic；And these
Modifications or substitutions, do not make the essence of appropriate technical solution depart from the spirit and model of each embodiment technical scheme of the utility model
Enclose.
Claims (10)
1. a kind of electric energy router, it is characterised in that including：Low-voltage direct end, three-phase alternating current end, HVDC end and three-phase branch
Road；Wherein, a whole bridge arm circuit is included respectively per phase branch road, each whole bridge arm circuit include a upper bridge arm circuit and
One lower bridge arm circuit, upper bridge arm circuit is sequentially connected in series by N number of half-bridge module and a upper bridge arm inductance, lower bridge arm circuit
Be sequentially connected in series by lower a bridge arm inductance and N number of half-bridge module, upper bridge arm inductance and lower bridge arm inductance be directly connected to and on
Tie point between bridge arm inductance and lower bridge arm inductance is referred to as bridge arm midpoint；
Wherein, each half-bridge module includes a half-bridge structure and the low tension battery group positioned at DC side；Each half-bridge mould
The DC voltage of block is U* SM, the DC side output voltage terminal of each half-bridge module is the low-voltage direct end of electric energy router；
Wherein, each half-bridge structure is made up of two IGBT pipes being vertically connected with, when IGBT pipes above are open-minded, under being located at
During the IGBT pipes shut-off of side, the exchange end output voltage U of half-bridge module corresponding with the half-bridge structureab=U* SM；When above
The shut-off of IGBT pipes, when underlying IGBT pipes are opened, the exchange end of half-bridge module corresponding with half-bridge structure output electricity
Press as Uab=0；Per phase branch road by controlling the break-make of two IGBT pipes in each half-bridge module to realize whole bridge arm output voltage Uarm
From 0~N*U* SMBetween stepped change；The electric energy router also includes modulation transformer, the input of the modulation transformer
It is connected with the bridge arm midpoint of three-phase, the output end of the modulation transformer is the three-phase alternating current end of the electric energy router；
The public direct-current side output voltage terminal of three-phase branch road rectifying bridge arm is the HVDC end of electric energy router.
2. electric energy router according to claim 1, it is characterised in that the DC side of the half-bridge module is additionally provided with branch
Support electric capacity.
3. electric energy router according to claim 1, it is characterised in that the inductance value of upper bridge arm inductance and lower bridge arm inductance
It is identical.
4. electric energy router according to claim 1, it is characterised in that the three-phase alternating current end of the electric energy router it is defeated
Going out voltage is：Ucabc=MUdc cosω0t；
Wherein, UcabcFor the output voltage at the three-phase alternating current end of electric energy router, M is the modulation ratio of the modulation transformer, ω0t
For the phase modulation of the modulation transformer, UdcFor the whole bridge arm output voltage of every phase branch road.
5. electric energy router according to claim 1, it is characterised in that the N is 6.
6. the electric energy router according to any one of Claims 1 to 5, it is characterised in that the DC side of each half-bridge module
Voltage U* SMFor 60V.
7. a kind of micro-capacitance sensor structure, it is characterised in that including：380V/220V ac bus, 336V dc bus, -48V direct currents
Bus and at least one electric energy router as described in any one of claim 1~6；
Wherein, the 380V/220V ac bus and electric energy router three-phase alternating current end connection, the 336V dc bus with
The low-voltage direct end of the HVDC end connection of the electric energy router, -48V dc bus and electric energy router is connected.
8. micro-capacitance sensor structure according to claim 7, it is characterised in that the micro-capacitance sensor structure also includes：Two-way friendship is straight
Flow converters and two-way DC converter；
The two-way AC and DC power electronic converter is connected with 380V/220V ac bus and 336V dc bus respectively；
The two-way DC converter is connected with 336V dc bus and -48V dc bus respectively.
9. micro-capacitance sensor structure according to claim 7, it is characterised in that the micro-capacitance sensor structure also includes：Electric main
AM access module, diesel generating set module, AC load module, HVDC load blocks, 336V batteries module, low pressure
DC load module and -48V batteries modules；
The electric main AM access module, the diesel generating set module, the AC load module and 380V ac bus
Connection；
The HVDC load blocks and the 336V batteries module are connected with 336V dc bus；
The low-voltage direct load blocks and the -48V batteries module are connected with -48V dc bus.
10. micro-capacitance sensor structure according to claim 7, it is characterised in that the micro-capacitance sensor structure also includes：Photovoltaic power supply
Module and wind power supply module, the photovoltaic power supply module and wind power supply module are connected with 336V dc bus.
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| CN107834602A (en) * | 2017-11-23 | 2018-03-23 | 兰州理工大学 | A kind of micro- source half-bridge current transformer tandem type micro-grid system |
| CN109039136A (en) * | 2018-09-27 | 2018-12-18 | 唐瑭 | A kind of power assembly system based on modular multi-level converter |
| CN111082421A (en) * | 2019-12-24 | 2020-04-28 | 嘉兴恒创电力设计研究院有限公司 | AC/DC micro-grid system based on energy router and protection method thereof |
| CN111245269A (en) * | 2020-03-02 | 2020-06-05 | 东南大学 | Modularized multi-level inverter based on micro energy storage unit |
| CN111740441A (en) * | 2020-07-08 | 2020-10-02 | 西安电子科技大学 | Multi-energy transmission path modular multi-level circuit with AC/DC parallel power supply |
| CN112186771A (en) * | 2020-10-09 | 2021-01-05 | 北京航空航天大学 | Electric energy router based on matrix converter and electric energy routing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107834602A (en) * | 2017-11-23 | 2018-03-23 | 兰州理工大学 | A kind of micro- source half-bridge current transformer tandem type micro-grid system |
| CN107834602B (en) * | 2017-11-23 | 2021-05-18 | 兰州理工大学 | Micro-grid system with micro-source half-bridge converter connected in series |
| CN109039136A (en) * | 2018-09-27 | 2018-12-18 | 唐瑭 | A kind of power assembly system based on modular multi-level converter |
| CN111082421A (en) * | 2019-12-24 | 2020-04-28 | 嘉兴恒创电力设计研究院有限公司 | AC/DC micro-grid system based on energy router and protection method thereof |
| CN111245269A (en) * | 2020-03-02 | 2020-06-05 | 东南大学 | Modularized multi-level inverter based on micro energy storage unit |
| CN111740441A (en) * | 2020-07-08 | 2020-10-02 | 西安电子科技大学 | Multi-energy transmission path modular multi-level circuit with AC/DC parallel power supply |
| CN112186771A (en) * | 2020-10-09 | 2021-01-05 | 北京航空航天大学 | Electric energy router based on matrix converter and electric energy routing method |
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