CN108667084A - A kind of micro-capacitance sensor cluster self-discipline cooperative control method based on flexible direct current interconnection - Google Patents
A kind of micro-capacitance sensor cluster self-discipline cooperative control method based on flexible direct current interconnection Download PDFInfo
- Publication number
- CN108667084A CN108667084A CN201810620490.3A CN201810620490A CN108667084A CN 108667084 A CN108667084 A CN 108667084A CN 201810620490 A CN201810620490 A CN 201810620490A CN 108667084 A CN108667084 A CN 108667084A
- Authority
- CN
- China
- Prior art keywords
- micro
- control
- control system
- capacitance sensor
- discipline
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- H02J5/00—Circuit arrangements for transfer of electric power between ac networks and dc 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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
-
- 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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
-
- 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
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Direct Current Feeding And Distribution (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a kind of micro-capacitance sensor cluster self-discipline cooperative control systems interconnected based on flexible direct current, it includes：Exchange micro-capacitance sensor balancing unit self-discipline control system：It is made of the control of secondary frequency retrieval and active power frequency droop control/reactive power voltage magnitude droop control；Direct-current grid balancing unit self-discipline control system：It restores control by secondary voltage and power DC voltage droop control is constituted；Micro-capacitance sensor interface current transformer self-discipline cooperative control system, it is made of DC micro-electric network interface current transformer, that is, two-way DC DC self-discipline cooperative control systems with the micro-capacitance sensor interface current transformer i.e. self-discipline cooperative control system of DC AC is exchanged；The present invention is on the basis of distributed energy storage, both the control of flexible direct current voltage may be implemented, it can also realize the micro- internetworking power autonomous control of region of micro-capacitance sensor group under normal operating conditions, improve micro-capacitance sensor group's inner equilibrium unit utilization ratio, realize that the operational mode between different operating statuses automatically switches.
Description
Technical field
The invention belongs to alternating current-direct current mixing micro-capacitance sensor group self-discipline Collaborative Control technical fields, more particularly to one kind is based on flexibility
The micro-capacitance sensor cluster self-discipline cooperative control method of direct current interconnection.
Background technology
Micro-capacitance sensor is a kind of distribution network by organic combinations such as distributed generation resource, load, energy storage devices together, can work
Make in be incorporated into the power networks or islet operation both of which, power grid can be enhanced and integrate large-scale distributed regenerative resource (such as sun
Can or wind energy) ability [1].Micro-capacitance sensor technology represents the following distributed energy supply system development trend, is the following intelligence
The important component of distribution system to propulsion energy-saving emission reduction and realizes that energy sustainable development is of great significance [2].With
It power load in micro-capacitance sensor constantly to increase, the capacity-constrained of single micro-capacitance sensor, control protection difficulty increases and electrical stability
Problem etc. is possible to limitation micro-capacitance sensor and receives high permeability intermittence distributed generation resource.If by multiple micro-capacitance sensors with the shape of cluster
Formula interconnects and operation, can enhance system power supply reliability and system run all right [3].
The exchange micro-capacitance sensor of direct-current grid or identical voltage and frequency with identical DC voltage level can not
[4-6] is directly interconnected by power electronics interface arrangement.But there are internetworking power controls for direct-current grid directly interconnection
Underaction and the problems such as without electrical isolation；The directly interconnection of multiple exchange micro-capacitance sensors may lead to electromagnetic looped network, be unfavorable for system
Safe operation [7]；And when having straight (friendship) stream generator unit or (straight) stream micro-capacitance sensor is handed in load access, corresponding AC- must be passed through
The multilevel energy conversion equipment that the electronic power convertors such as DC are constituted increases cost and loss [8].
AC and DC micro-capacitance sensor can access common DC bus, therefore micro-capacitance sensor by corresponding power electronics interface arrangement
Group can provide high reliability power supply with the receiving local AC/DC generator unit and energy-storage units of high efficient and flexible for local load
[9].Meanwhile exchanging micro-capacitance sensor and being connected with power distribution network by PCC, realization is incorporated into the power networks.Micro-capacitance sensor passes through power electronics interface
Device parallel connection access common DC bus structure can be further developed into DC distribution center, build the following intelligent distribution system,
Realize flexible, reliable, efficient distribution and trend flexible dispatching and control.
Document [17,18] proposes a kind of centralized energy storage mixing micro-capacitance sensor group structure.All energy storage devices are concentrated on one
It rises, forms energy storage subnet, maintain common DC bus voltage stabilization.But when energy storage subnet failure, it will be unable to remain public straight
Stream busbar voltage is constant, and the stability of mixing micro-capacitance sensor group substantially reduces.
Bibliography
[1]M.M.Hashempour,M.Savaghebi,J.C.Vasquez,et al.A Control
Architecture to Coordinate Distributed Generators and Active Power Filters
Coexisting in a Microgrid[J].IEEE Transactions on Smart Grid,2016,7(5):2325-
2336.
[2] king at mountain micro-capacitance sensors analysis with simulation theory [M] Science Presses, 2013.
[3]M.He,M.Giesselmann.Reliability-Constrained Self-Organization and
Energy Management Towards a Resilient Microgrid Cluster[C].in Proc.Innovative
Smart Grid Technologies Conference.2015:1-5.
[4]Q.Shafiee,T.J.C.Vasquez,et al.Hierarchical Control for
Multiple Dc-Microgrids Clusters[J].IEEE Transactions on Energy Conversion,
2014,29(4):922-933.
[5]S.Moayedi,A.Davoudi.Distributed Tertiary Control of Dc Microgrid
Clusters[J].IEEE Transactions on Power Electronics,2015,31(2):1717-1733.
[6]M.H.Amini,R.Jaddivada,S.Mishra,et al.Distributed Security
Constrained Economic Dispatch[C].in Proc.Innovative Smart Grid Technologies-
Asia.2015:1-6.
[7]P.Wei,D.U.Yan,L.I.Hongtao,et al.Novel Solution and Key Technology
of Interconnection and Interaction for Large Scale Microgrid Cluster
Integration[J].High Voltage Engineering,2015
[8]P.TeimourzadehBaboli,M.Shahparasti,M.ParsaMoghaddam,et al.Energy
Management and Operation Modelling of Hybrid Ac–Dc Microgrid[J].Generation
Transmission&Distribution Iet,2014,8(10):1700-1711.
[9]R.Majumder,G.Bag.Parallel Operation of Converter Interfaced
Multiple Microgrids[J].International Journal of Electrical Power&Energy
Systems,2014,55(2):486-496.
[10]Y.Xia,W.Wei,M.Yu,et al.Power Management for a Hybrid Ac/Dc
Microgrid with Multiple Subgrids[J].IEEE Transactions on Power Electronics,
2017,PP(99):1.
[11]Y.Xia,W.Wei,M.Yu,et al.Decentralized Multi-Time Scale Power
Control for a Hybrid Ac/Dc Microgrid with Multiple Subgrids[J].IEEE
Transactions on Power Electronics,2017,PP(99):1.
Invention content：
The technical problem to be solved in the present invention：A kind of micro-capacitance sensor cluster self-discipline collaboration control interconnected based on flexible direct current is provided
Method processed can also realize the sub- microgrid in the region of micro-capacitance sensor group under normal operating conditions to realize that flexible direct current voltage controls
Between interconnect power autonomous control, improve micro-capacitance sensor group's inner equilibrium unit utilization ratio, realize the operation mould between different operating statuses
Formula automatically switches.
Technical solution of the present invention：
A kind of micro-capacitance sensor cluster self-discipline cooperative control system based on flexible direct current interconnection, it includes：
Exchange micro-capacitance sensor balancing unit self-discipline control system：It is controlled by secondary frequency retrieval and active power --- frequency
Droop control/reactive power --- voltage magnitude droop control is constituted；
Direct-current grid balancing unit self-discipline control system：It restores control and power --- DC voltage by secondary voltage
Droop control is constituted；
Micro-capacitance sensor interface current transformer self-discipline cooperative control system, it is by DC micro-electric network interface current transformer, that is, bi-directional DC-DC
Self-discipline cooperative control system is constituted with the self-discipline cooperative control system for exchanging the i.e. DC-AC of micro-capacitance sensor interface current transformer.
Exchange micro-capacitance sensor balancing unit self-discipline control system control formula be：
In formula, r=i and j；ωr、ωr_setAnd Ps_r,acRespectively the busbar frequency of exchange subnet #r, a-c cycle setting
Initial value and balancing unit reality output active power；kac_r,pAnd Hac_r,pActive power is indicated respectively --- frequency droop controls
The sagging coefficient and inertial parameter of system；ωr0It is expected frequency retrieval reference value, Tfs,rProlong for describing secondary control system
When, kps,rAnd kis,rThe respectively proportional gain of linear quadratic control PI controllers and storage gain；Er、Er *And Qs_r,acRespectively exchange
Virtual voltage amplitude, voltage magnitude setting value and the balancing unit output reactive power of subnet #r；kac_r,qAnd Hac_r,qRespectively
Indicate reactive power --- the sagging coefficient and inertial parameter of voltage magnitude control system.
The control formula of direct-current grid balancing unit self-discipline control system is：
uref_m=um_set-Ps_m,dc/kdc_m+(um0-um)(kps,m+kis,m/s)/(1+Tfs,mS) in formula, m=k and l；；um、
um_set、Ps_m,dcAnd kdc_mThe characteristic DC voltage setting of direct current subnet #m busbar voltages, droop control is indicated respectively just
Value, balancing unit reality output active power and sagging coefficient；um0It is expected that voltage restores reference value, Tfs,mIndicate two secondary controls
System delay processed, kps,mAnd kis,mThe respectively proportional gain of linear quadratic control PI controllers and storage gain.
The DC micro-electric network interface current transformer, that is, bi-directional DC-DC self-discipline cooperative control system becomes with micro-capacitance sensor interface is exchanged
The self-discipline cooperative control system for flowing device, that is, DC-AC includes outer shroud control system and inner ring control system；Outer shroud control system is mutual
Join power autonomous control, by being in communication with each other in system, obtains droop characteristic parameter, then the practical busbar electricity for measuring each subnet
Pressure and frequency, while upper layer power dispatching instruction can be received, interconnect device self-discipline Collaborative Control inner ring is obtained after operation
Value and power reference Pset_i,ac、Pset_j,ac、Pset_k,dcAnd Pset_l,dc, calculation formula is：
P in formula* IC,i(P* IC,j) and PIC,i(PIC,j) it is respectively the interconnection that AC microgrids #i (#j) accesses common DC bus
The upper layer power dispatching instruction and real output that device receives；P* IC,k(P* IC,l) and PIC,k(P* IC,l) it is respectively that direct current is micro-
It nets #k (#l) and accesses the upper layer power dispatching instruction and real output that the interconnect device of common DC bus receives, Gdp,i
(s)、Gdp,j(s)、Gdp,k(s) and Gdp,l(s) it is power dispatching PI controllers；GC,i(s)、GC,j(s)、GC,k(s) and GC,l(s) it is
Outer shroud controls PI controllers；
Inner ring control system uses the voltage-source type control method with simulation inertial element, in interconnection power control, directly
It realizes and takes over seamlessly between the voltage-controlled system of galvanic electricity and alternating voltage/FREQUENCY CONTROL pattern, be not necessarily to handover control system.
Beneficial effects of the present invention：
The present invention both may be implemented the control of flexible direct current voltage, can also realize micro-capacitance sensor on the basis of distributed energy storage
The micro- internetworking power autonomous control of region of group under normal operating conditions, improves micro-capacitance sensor group's inner equilibrium unit using effect
Rate realizes that the operational mode between different operating statuses automatically switches；The present invention realizes soft while carrying out power coordination control
Property DC voltage control.More AC and DC micro-capacitance sensors access common DC bus with parallel way by power electronics interface arrangement,
Composition mixing micro-capacitance sensor group, can high efficient and flexible receiving distributed generation unit and energy-storage units, providing height for local load can
By property power supply.The local self-contained system of each subnet self-contained one, and restrained oneself coordination control strategy by power electronics interconnect device,
Realize the flexible interconnection between subnet and mutually support.Solve the deficiencies in the prior art.
Description of the drawings：
Fig. 1 present system hardware architecture diagrams；
Fig. 2 present invention exchanges subnet balancing unit control structure schematic diagram；
Fig. 3 direct current subnet balancing unit control structure schematic diagrames of the present invention；
Fig. 4 interconnect device DC-AC control structure schematic diagrames of the present invention；
Fig. 5 interconnect device DC-DC control structure schematic diagrames of the present invention；
Fig. 6 simulation results (DC voltage, a-c cycle)；
Fig. 7 simulation results (interconnect device output power)；
Fig. 8 simulation results (balancing unit output power)；
Specific implementation mode：
The micro-capacitance sensor cluster self-discipline cooperative control system based on flexible direct current interconnection described in the content of present invention, system include
Two exchange subnets (exchange subnet #i, #j), two direct current subnets (direct current subnet #k, #l), pass through corresponding interconnect device respectively
It is interconnected with common DC bus.Include system balancing unit (such as energy type energy storage device, controllable type in each AC and DC subnet
Distributed generation resource etc.) and power cell (such as generation of electricity by new energy, load).
A kind of micro-capacitance sensor cluster self-discipline cooperative control system based on flexible direct current interconnection, it includes：
Exchange micro-capacitance sensor balancing unit self-discipline control system：It is controlled by secondary frequency retrieval and active power --- frequency
Droop control/reactive power --- voltage magnitude droop control is constituted；
Direct-current grid balancing unit self-discipline control system：It restores control and power --- DC voltage by secondary voltage
Droop control is constituted；
Micro-capacitance sensor interface current transformer self-discipline cooperative control system, it is by DC micro-electric network interface current transformer, that is, bi-directional DC-DC
Self-discipline cooperative control system is constituted with the self-discipline cooperative control system for exchanging the i.e. DC-AC of micro-capacitance sensor interface current transformer.
Each exchange subnet contains independent power self-contained system, and power cell uses power limitation control pattern, balance
Unit uses power --- a-c cycle droop control.Wherein balancing unit control system is by active power --- frequency droop control
System, reactive power --- voltage magnitude droop control, linear quadratic control and voltage inter-loop control are constituted, as shown in Figure 2.Linear quadratic control
Major function be restore a-c cycle.Specific embodiment is as follows：
In formula, r=i and j；ωr、ωr_setAnd Ps_r,acRespectively the busbar frequency of exchange subnet #r, a-c cycle setting
Initial value and balancing unit reality output active power；kac_r,pAnd Hac_r,pActive power is indicated respectively --- frequency droop controls
The sagging coefficient and inertial parameter of system；ωr0It is expected frequency retrieval reference value, Tfs,rProlong for describing secondary control system
When, kps,rAnd kis,rThe respectively proportional gain of linear quadratic control PI controllers and storage gain；Er、Er *And Qs_r,acRespectively exchange
Virtual voltage amplitude, voltage magnitude setting value and the balancing unit output reactive power of subnet #r；kac_r,qAnd Hac_r,qRespectively
Indicate reactive power --- the sagging coefficient and inertial parameter of voltage magnitude control system.
Each direct current subnet contains independent power self-contained system, and power cell uses power limitation control pattern, balance
Unit uses power --- DC voltage droop control.Wherein balancing unit control system is by power --- the sagging control of DC voltage
System, linear quadratic control and Double closed-loop of voltage and current are constituted, as shown in Figure 3.The major function of linear quadratic control is to restore direct current
Pressure.Specific embodiment is as follows：
uref_m=um_set-Ps_m,dc/kdc_m+(um0-um)(kps,m+kis,m/s)/(1+Tfs,ms) (2)
In formula, m=k and l；；um、um_set、Ps_m,dcAnd kdc_mDirect current subnet #m busbar voltages, droop control are indicated respectively
Characteristic DC voltage initialization, balancing unit reality output active power and sagging coefficient；um0It is expected voltage
Restore reference value, Tfs,mIndicate secondary control system delay, kps,mAnd kis,mThe respectively proportional gain of linear quadratic control PI controllers
And storage gain.
Constructing micro-capacitance sensor group's common DC bus droop control curve is
uDC=UDC *-PDC/kDC (3)
U in formulaDC、UDC *、PDC *And PDCIndicate respectively in micro-capacitance sensor group common bus DC voltage in virtual droop control,
Direct voltage reference value, power reference and real output；kDCFor sagging coefficient.
It is assumed that exchange subnet #i, #j and direct current subnet #k, #l inner equilibrium unit rated capacity Pos_i,ac、Pos_j,ac、
Pos_k,dcAnd Pos_l,dc, and its capacity ratio meets Pos_i,ac:Pos_j,ac:Pos_k,dc:Pos_l,dc=α:β:γ:1.
Micro-capacitance sensor interface current transformer is restrained oneself cooperative control system, it by exchange micro-capacitance sensor interface current transformer, that is, DC-AC from
It restrains cooperative control system and DC micro-electric network interface current transformer, that is, bi-directional DC-DC self-discipline cooperative control system is constituted, respectively such as Fig. 4
Shown in Fig. 5.
A) outer shroud control system is interconnection power autonomous control, by being in communication with each other in system, getter droop characteristic ginseng
Number, it is then practical to measure the busbar voltage and frequency of each subnet, while upper layer power dispatching instruction can be received, after operation
Interconnect device self-discipline Collaborative Control inner loop power reference value is obtained, specific embodiment is as follows：
For upper layer power dispatching instruction can be received, using loop control as follows：
P in formula* IC,i(P* IC,j) and PIC,i(PIC,j) it is respectively the interconnection that AC microgrids #i (#j) accesses common DC bus
The upper layer power dispatching instruction and real output that device receives；P* IC,k(P* IC,l) and PIC,k(P* IC,l) it is respectively that direct current is micro-
It nets #k (#l) and accesses the upper layer power dispatching instruction and real output that the interconnect device of common DC bus receives, Gdp,i
(s)、Gdp,j(s)、Gdp,k(s) and Gdp,l(s) be Fig. 4 and Fig. 5 outer shrouds control in PI controllers；Shown in Fig. 4 and Fig. 5
Control, obtains power reference increment Delta Pdp,iac、ΔPdp,jac、ΔPdp,kdcWith Δ Pdp,ldc, adjustable in interconnect device output power
In the case of, you can realize power dispatching.
It is as follows to define power error：
In formula, Δ Ps,iac、ΔPs,jac、ΔPs,kdcWith Δ Pl,ldcRespectively exchange subnet #i, #j and direct current subnet #k, #
The power error of l balancing units, kac_i,p、kac_j,p、kdc_kAnd kdc_lRespectively exchange subnet #i, #j and direct current subnet #
The sagging coefficient of k, #l balancing unit.
On the basis of (4) and (5), interconnect device self-discipline Collaborative Control inner loop power reference value P can be obtainedset_i,ac、
Pset_j,ac、Pset_k,dcAnd Pset_l,dc：
Control loop transmission function G in formulaC,i(s)、GC,j(s)、GC,k(s) and GC,l(s) PI controllers be may be designed as.
B) inner ring controls：The control of DC-AC interconnect device inner ring is using the voltage-source type control plan with simulation inertial element
Slightly, it can realize and take over seamlessly between interconnection power control, DC voltage control and alternating voltage/FREQUENCY CONTROL pattern, without cutting
Change control system；Since both sides are straight-flow system, inner ring control then can be closed directly using power DC-DC interconnect devices
Ring or current closed-loop realize power tracking control.
To verify the validity of micro-capacitance sensor group self-discipline coordination control strategy proposed in this paper, built in PSCAD softwares
Including the dynamic model of each subsystem busbar voltage (frequency) dynamic characteristic and controlling unit.It is public in the simplified model
Common DC bus voltage and direct current subnet dynamic voltage characteristics are described as：
In formula, Ke,DC=CDC(UB,DC)2/PB；Ke,k=Ck(UB,k)2/PB；Ke,l=Cl(UB,l)2/PB；CDC、CkAnd ClRespectively
Equivalent capacity amount (famous value) in expression common DC bus region, direct current subnet #k and #l.
Retain droop control and DC voltage closed loop control in exchange subnet and direct current subnet control method in simplified model
Braking step response (exchange micro-capacitance sensor balancing unit only considers droop control characteristic), electric current loop is reduced to first order inertial loop.
Each sub-net module parameter and interconnect device module parameter are respectively such as table 1 and table in micro-capacitance sensor group control simplified model
Shown in 2.
1 AC and DC subnet of table controls simplified model parameter
2 interconnect device parameter of table
In micro-capacitance sensor group's normal course of operation, after carried control strategy herein, system dynamic characteristic simulation result
As shown in figs 6-8.
t<2s：It is respectively P to exchange subnet #i, #j and the output of direct current subnet #k, #l power cellp_i,ac=0.2, Pp_j,ac=
0.8、Pp_k,dc=0.4 and Pp_k,dc=0.6, DC-ACs and DC-DCs interconnect devices are in standby；T=2s moment DC-ACs
Start this paper control strategies with DC-DCs interconnect devices；T=4.5s moment, cut-in voltage (frequency) linear quadratic control；When t=7s
It carves, exchanges subnet #i, #j and the output of direct current subnet #k, #l power cell adjusts separately as Pp_i,ac=0.5, Pp_j,ac=1,
Pp_k,dc=1 and Pp_k,dc=0.5, simulated power disturbance；T=10s moment, α and γ become 0.2 and 0.8, analog AC respectively
Net #i and direct current subnet #k balancing unit volume changes；The t=14s moment is sent out respectively to interconnect device DC-AC#i and DC-DC#k
Go out power dispatching instruction P* IC,i=0.5, P* IC,k=0.1.
It was found from simulation result shown in figure：Under normal operating condition, flexible direct current may be implemented using this paper control strategies
Voltage controls and transient power support, realizes that balance single unit output power is allocated by its capacity ratio, while can be compared with
Power dispatching instruction is tracked well.
Claims (4)
- The cooperative control system 1. a kind of micro-capacitance sensor cluster based on flexible direct current interconnection is restrained oneself, it includes：Exchange micro-capacitance sensor balancing unit self-discipline control system：It is controlled by secondary frequency retrieval and active power --- frequency droop Control/reactive power --- voltage magnitude droop control is constituted；Direct-current grid balancing unit self-discipline control system：It restores control by secondary voltage and power --- DC voltage is sagging Control is constituted；Micro-capacitance sensor interface current transformer self-discipline cooperative control system, it is restrained oneself by DC micro-electric network interface current transformer, that is, bi-directional DC-DC Cooperative control system is constituted with the self-discipline cooperative control system for exchanging the i.e. DC-AC of micro-capacitance sensor interface current transformer.
- The cooperative control method 2. a kind of micro-capacitance sensor cluster based on flexible direct current interconnection according to claim 1 is restrained oneself, It is characterized in that：Exchange micro-capacitance sensor balancing unit self-discipline control system control formula be：In formula, r=i and j；ωr、ωr_setAnd Ps_r,acRespectively the busbar frequency of exchange subnet #r, a-c cycle initialization And balancing unit reality output active power；kac_r,pAnd Hac_r,pActive power is indicated respectively --- frequency droop control system Sagging coefficient and inertial parameter；ωr0It is expected frequency retrieval reference value, Tfs,rFor describing secondary control system delay, kps,rAnd kis,rThe respectively proportional gain of linear quadratic control PI controllers and storage gain；Er、Er *And Qs_r,acRespectively exchange Net virtual voltage amplitude, voltage magnitude setting value and the balancing unit output reactive power of #r；kac_r,qAnd Hac_r,qTable respectively Show reactive power --- the sagging coefficient and inertial parameter of voltage magnitude control system.
- The cooperative control method 3. a kind of micro-capacitance sensor cluster based on flexible direct current interconnection according to claim 1 is restrained oneself, It is characterized in that：The control formula of direct-current grid balancing unit self-discipline control system is：uref_m=um_set-Ps_m,dc/kdc_m+(um0-um)(kps,m+kis,m/s)/(1+Tfs,ms)In formula, m=k and l；；um、um_set、Ps_m,dcAnd kdc_mIndicate that direct current subnet #m busbar voltages, droop control characteristic are bent respectively DC voltage initialization, balancing unit reality output active power and the sagging coefficient of line；um0It is expected that voltage restores ginseng Examine value, Tfs,mIndicate secondary control system delay, kps,mAnd kis,mThe respectively proportional gain of linear quadratic control PI controllers and integral Gain.
- The cooperative control method 4. a kind of micro-capacitance sensor cluster based on flexible direct current interconnection according to claim 1 is restrained oneself, It is characterized in that：The DC micro-electric network interface current transformer, that is, bi-directional DC-DC self-discipline cooperative control system with exchange micro-capacitance sensor interface The self-discipline cooperative control system of current transformer, that is, DC-AC includes outer shroud control system and inner ring control system；Outer shroud control system is Power autonomous control is interconnected, by being in communication with each other in system, obtains droop characteristic parameter, then the practical busbar for measuring each subnet Voltage and frequency, while upper layer power dispatching instruction can be received, it is obtained after operation in interconnect device self-discipline Collaborative Control Ring value and power reference Pset_i,ac、Pset_j,ac、Pset_k,dcAnd Pset_l,dc, calculation formula is：P in formula* IC,i(P* IC,j) and PIC,i(PIC,j) it is respectively the mutual multi pack that exchange micro-capacitance sensor #i (#j) accesses common DC bus Set upper layer power dispatching instruction and the real output of receiving；P* IC,k(P* IC,l) and PIC,k(P* IC,l) it is respectively direct-current micro-grid # K (#l) accesses the upper layer power dispatching instruction and real output that the interconnect device of common DC bus receives, Gdp,i(s)、 Gdp,j(s)、Gdp,k(s) and Gdp,l(s) it is power dispatching PI controllers；GC,i(s)、GC,j(s)、GC,k(s) and GC,l(s) it is outer shroud Control PI controllers；Inner ring control system uses the voltage-source type control method with simulation inertial element, in interconnection power control, direct current It realizes and takes over seamlessly between voltage-controlled system and alternating voltage/FREQUENCY CONTROL pattern, be not necessarily to handover control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810620490.3A CN108667084B (en) | 2018-06-15 | 2018-06-15 | Micro-grid cluster autonomous cooperative control system based on flexible direct current interconnection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810620490.3A CN108667084B (en) | 2018-06-15 | 2018-06-15 | Micro-grid cluster autonomous cooperative control system based on flexible direct current interconnection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108667084A true CN108667084A (en) | 2018-10-16 |
| CN108667084B CN108667084B (en) | 2020-04-17 |
Family
ID=63775803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810620490.3A Active CN108667084B (en) | 2018-06-15 | 2018-06-15 | Micro-grid cluster autonomous cooperative control system based on flexible direct current interconnection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108667084B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109687500A (en) * | 2018-12-28 | 2019-04-26 | 华北电力大学 | A kind of method of dispersion between more convertor units of flexible direct-current transmission system converter station from type of law voltage balancing control |
| CN109861309A (en) * | 2019-02-27 | 2019-06-07 | 华北电力大学 | A kind of isolated operation micro-capacitance sensor group energy amount scheduling distributed optimization method |
| CN110752627A (en) * | 2019-10-29 | 2020-02-04 | 国网四川省电力公司经济技术研究院 | Microgrid autonomous cooperative control system considering energy complementation |
| CN111864723A (en) * | 2020-07-21 | 2020-10-30 | 浙江大学 | Novel direct-current microgrid group topology and distributed power cooperative control method thereof |
| CN112117751A (en) * | 2020-07-08 | 2020-12-22 | 珠海兴诺能源技术有限公司 | Flexible distribution method and system for charging power of direct current pile |
| CN112688294A (en) * | 2020-12-16 | 2021-04-20 | 南昌航空大学 | Consistency coordination control method for flexible interconnected direct-current micro-grid group |
| CN113890081A (en) * | 2021-10-21 | 2022-01-04 | 国网江苏省电力有限公司电力科学研究院 | Operation control system for flexible interconnected direct-current micro-grid in multiple regions |
| CN115528667A (en) * | 2022-11-28 | 2022-12-27 | 西华大学 | Direct-current micro-grid cluster control system and multi-stage cooperative control method thereof |
| CN116706977A (en) * | 2023-06-05 | 2023-09-05 | 北京交通大学 | AC/DC micro-grid group distributed peer-to-peer cluster control method and system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113346500B (en) * | 2021-04-26 | 2023-06-02 | 西安交通大学 | Flexible switching converter supporting micro-grid full-autonomous control and control method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110068634A1 (en) * | 2009-09-18 | 2011-03-24 | Power Distribution Inc. | Direct current power supply for mission critical applications |
| KR101417669B1 (en) * | 2013-08-02 | 2014-07-09 | 서울과학기술대학교 산학협력단 | System for controlling bidirectional converter |
| CN104300589A (en) * | 2014-10-30 | 2015-01-21 | 国家电网公司 | Hierarchical control method for ad/dc microgrid with direct voltage recovery character |
| CN106786599A (en) * | 2017-01-13 | 2017-05-31 | 天津大学 | The two-way DC AC interconnect device intelligent control methods of alternating current-direct current mixing micro-capacitance sensor |
| CN106849052A (en) * | 2017-03-29 | 2017-06-13 | 天津大学 | Direct-current grid group's power coordination control method |
-
2018
- 2018-06-15 CN CN201810620490.3A patent/CN108667084B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110068634A1 (en) * | 2009-09-18 | 2011-03-24 | Power Distribution Inc. | Direct current power supply for mission critical applications |
| KR101417669B1 (en) * | 2013-08-02 | 2014-07-09 | 서울과학기술대학교 산학협력단 | System for controlling bidirectional converter |
| CN104300589A (en) * | 2014-10-30 | 2015-01-21 | 国家电网公司 | Hierarchical control method for ad/dc microgrid with direct voltage recovery character |
| CN106786599A (en) * | 2017-01-13 | 2017-05-31 | 天津大学 | The two-way DC AC interconnect device intelligent control methods of alternating current-direct current mixing micro-capacitance sensor |
| CN106849052A (en) * | 2017-03-29 | 2017-06-13 | 天津大学 | Direct-current grid group's power coordination control method |
Non-Patent Citations (1)
| Title |
|---|
| JAE-WON CHANG等: "Hierarchical Coordinated Control of Grid-Connected Microgrids Considering the Reasonability and Reliability", 《2017 52ND INTERNATIONAL UNIVERSITIES POWER ENGINEERING CONFERENCE (UPEC)》 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109687500A (en) * | 2018-12-28 | 2019-04-26 | 华北电力大学 | A kind of method of dispersion between more convertor units of flexible direct-current transmission system converter station from type of law voltage balancing control |
| CN109687500B (en) * | 2018-12-28 | 2021-01-08 | 华北电力大学 | Method for controlling distributed self-discipline voltage balance among multiple converter units of converter station of flexible direct current transmission system |
| CN109861309A (en) * | 2019-02-27 | 2019-06-07 | 华北电力大学 | A kind of isolated operation micro-capacitance sensor group energy amount scheduling distributed optimization method |
| CN110752627A (en) * | 2019-10-29 | 2020-02-04 | 国网四川省电力公司经济技术研究院 | Microgrid autonomous cooperative control system considering energy complementation |
| CN112117751A (en) * | 2020-07-08 | 2020-12-22 | 珠海兴诺能源技术有限公司 | Flexible distribution method and system for charging power of direct current pile |
| CN111864723A (en) * | 2020-07-21 | 2020-10-30 | 浙江大学 | Novel direct-current microgrid group topology and distributed power cooperative control method thereof |
| CN112688294A (en) * | 2020-12-16 | 2021-04-20 | 南昌航空大学 | Consistency coordination control method for flexible interconnected direct-current micro-grid group |
| CN112688294B (en) * | 2020-12-16 | 2022-09-27 | 南昌航空大学 | Consistency coordination control method for flexible interconnected direct-current micro-grid group |
| CN113890081A (en) * | 2021-10-21 | 2022-01-04 | 国网江苏省电力有限公司电力科学研究院 | Operation control system for flexible interconnected direct-current micro-grid in multiple regions |
| CN115528667A (en) * | 2022-11-28 | 2022-12-27 | 西华大学 | Direct-current micro-grid cluster control system and multi-stage cooperative control method thereof |
| CN115528667B (en) * | 2022-11-28 | 2023-04-07 | 西华大学 | Direct-current micro-grid cluster control system and multi-stage cooperative control method thereof |
| CN116706977A (en) * | 2023-06-05 | 2023-09-05 | 北京交通大学 | AC/DC micro-grid group distributed peer-to-peer cluster control method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108667084B (en) | 2020-04-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108667084A (en) | A kind of micro-capacitance sensor cluster self-discipline cooperative control method based on flexible direct current interconnection | |
| Shirkhani et al. | A review on microgrid decentralized energy/voltage control structures and methods | |
| Sahoo et al. | Control techniques in AC, DC, and hybrid AC–DC microgrid: A review | |
| CN105514966B (en) | A kind of direct-current grid group energy storage optimization and control method for coordinating | |
| Ding et al. | Control of hybrid AC/DC microgrid under islanding operational conditions | |
| CN105762841B (en) | A kind of parallel virtual synchronous generator distributed collaboration progress control method and system | |
| CN106849106B (en) | DC distribution net system voltage flexible control method | |
| CN106786599B (en) | The two-way DC-AC interconnect device intelligent control method of alternating current-direct current mixing micro-capacitance sensor | |
| Malik et al. | A generalized droop strategy for interlinking converter in a standalone hybrid microgrid | |
| Shen et al. | Control Techniques for Bidirectional Interlinking Converters in Hybrid Microgrids: Leveraging the advantages of both ac and dc | |
| CN105896623A (en) | AC/DC hybrid power distribution system based on multi-terminal flexible DC power transmission technology | |
| CN104330980A (en) | RT-LAB based microgrid simulation testing system | |
| Han et al. | Coordinated power control with virtual inertia for fuel cell-based DC microgrids cluster | |
| CN206471841U (en) | Electric energy router and micro-capacitance sensor structure | |
| Li et al. | Analysis of multi-agent-based adaptive droop-controlled AC microgrids with PSCAD: modeling and simulation | |
| CN108258676A (en) | Complete controllable flexibly distribution system and method based on direct current multiport electric energy exchanger | |
| Wu et al. | A review for control strategies in microgrid | |
| CN114640141A (en) | Network-building type fan control method for offshore wind power diode rectification unit sending-out system | |
| Padhi et al. | Dc microgrids: architecture and challenges | |
| CN109217346B (en) | Back-to-back direct current power transmission system based on virtual synchronous machine and control method | |
| CN107196339B (en) | Microgrid stratified sampling distributed and coordinated control method based on event trigger mechanism | |
| Monesha et al. | Microgrid: recent trends and control | |
| Shi et al. | Multi-agent-based control strategy for centerless energy management in microgrid clusters | |
| CN112994019B (en) | Flexible interconnected power distribution network system | |
| CN108521146A (en) | A kind of alternating current-direct current power distribution network area stability control device and control method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |