CN207339264U - A kind of DC distribution central control system - Google Patents
A kind of DC distribution central control system Download PDFInfo
- Publication number
- CN207339264U CN207339264U CN201720962818.0U CN201720962818U CN207339264U CN 207339264 U CN207339264 U CN 207339264U CN 201720962818 U CN201720962818 U CN 201720962818U CN 207339264 U CN207339264 U CN 207339264U
- Authority
- CN
- China
- Prior art keywords
- exchange
- distribution
- current
- direct
- bus
- 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.)
- Active
Links
Abstract
The utility model discloses a kind of DC distribution central control system, it includes exchange piconet controller, passes through network connection between the exchange piconet controller, direct-current micro-grid controller and middle straightening flow center control unit；AC distribution net is connected with isolating transformer, and isolating transformer is connected with multilevel converter, and multilevel converter is connected with dc bus；Exchange micro-capacitance sensor is connected by multilevel converter MMC with dc bus, and direct-current grid is connected by DC converter with dc bus；Solve conventional electrical distribution net use dominated with supplier, single radial power supply based on operational mode, in the planning and designing stage of distribution and operational management, do not deeply consider the access of distributed generation resource；With being continuously increased for distributed power generation access amount, the quick popularization of electric automobile, controllable burden persistently increases, and has been difficult to meet the technical problems such as requirement of the user to environmental protection, power supply reliability, power quality and good service.
Description
Technical field
The utility model belongs to the technical field of Automation of Electric Systems, more particularly to a kind of DC distribution center control system
System.
Background technology
Domestic DC distribution host will have middle two kinds of forms of straightening stream power distribution network and low-voltage direct power distribution network.Wherein, middle pressure
DC distribution net is still in the starting stage, and low-voltage direct power distribution network is then more mature.
Conventional electrical distribution network topology structure, automated system and switchgear, it is difficult to inherently change power distribution network system
The uncontrollability of irrespective of size, it is impossible to adapt to polynary supply of electric power mode.The urban power distribution network of connection of ring power network pattern is even used, it is real
It is also that feeder line presses radial switched-mode power supply in matter, it is unbalanced there are load factor between each subregion, lack wattful power between each other
The support of rate and reactive power, and then cause that medium-voltage line utilization rate of equipment and installations is low, and quality of voltage is uneven, it is difficult to meet distribution
Requirement of the net in Voltage-Reactive Power compensation, power quality etc., it is impossible to adapt to the access of high density distributed generation resource.It is for this reason, sharp
With advanced Power Electronic Technique, the system controllability and measurability of power distribution network is improved, single radiation type electric supply pattern is converted into closed loop powering mode,
The digestion capability to high density distributed generation resource is improved, the overall equipment efficiency of usage for improving power distribution network, turn power supply capacity and confession
Electric reliability, is the direction of following medium voltage distribution network development.
Conventional electrical distribution net use dominated with supplier, single radial power supply based on operational mode, set in the planning of distribution
In meter stage and operational management, distributed generation resource (distributed energy resources, DER) is not deeply considered
Access.As distributed power generation (distributed generation, DG) access amount is continuously increased, electric automobile it is fast
Speed popularization, controllable burden persistently increase, and existing power distribution network framework has been difficult to meet that user is reliable to environmental protection, power supply
Property, power quality and the requirement of good service.
Utility model content
The technical problems to be solved in the utility model：A kind of DC distribution central control system is provided, is matched somebody with somebody with solving tradition
Power grid use dominated with supplier, single radial power supply based on operational mode, distribution the planning and designing stage and operation manage
In reason, the access of distributed generation resource is not deeply considered；With being continuously increased for distributed power generation access amount, electric automobile it is fast
Speed popularization, controllable burden persistently increase, and existing power distribution network framework has been difficult to meet that user is reliable to environmental protection, power supply
The technical problems such as property, power quality and the requirement of good service.
Technical solutions of the utility model：
A kind of DC distribution central control system, it includes exchange piconet controller, the exchange piconet controller, direct current
Pass through network connection between piconet controller and middle straightening flow center control unit；AC distribution net is connected with isolating transformer,
Isolating transformer is connected with multilevel converter, and multilevel converter is connected with dc bus；Exchange micro-capacitance sensor passes through more level
Transverter MMC is connected with dc bus, and direct-current grid is connected by DBA DC converters DBA with dc bus.
Multilevel converter, DC converter DBA and middle straightening flow center control unit pass through network connection.
Exchange piconet controller passes through network connection with exchanging each current transformer inside micro-capacitance sensor；Direct-current micro-grid controller
Pass through network connection with each current transformer inside direct-current grid.
The network connection is to follow the network connection of IEC 61850/GOOSE.
The beneficial effects of the utility model：
, can be by operation side after the utility model in AC distribution net or alternating current-direct current micro-capacitance sensor to mains power failure occur
The reconstruct of formula, restores electricity, and effectively increases power supply reliability；
The utility model provides the access way and distribution system of multiple voltage grade multiple power sources type, effectively lifting
Urban power distribution network receives clean energy resource ability；Solve conventional electrical distribution net use dominated with supplier, single radial power supply based on
Operational mode, in the planning and designing stage of distribution and operational management, do not deeply consider the access of distributed generation resource；With
Distributed power generation access amount is continuously increased, and the quick popularization of electric automobile, controllable burden persistently increases, existing power distribution network
Framework has been difficult to meet the technical problems such as requirement of the user to environmental protection, power supply reliability, power quality and good service.
Brief description of the drawings：
Fig. 1 is the utility model structure diagram.
Embodiment：
A kind of DC distribution central control system, it includes exchange piconet controller, the exchange piconet controller, direct current
Pass through network connection between piconet controller and middle straightening flow center control unit；AC distribution net is connected with isolating transformer,
Isolating transformer is connected with multilevel converter, and multilevel converter is connected with dc bus；Exchange micro-capacitance sensor passes through more level
Transverter MMC is connected with dc bus, and direct-current grid is connected by DBA DC converters DBA with dc bus.
Multilevel converter, DC converter DBA and middle straightening flow center control unit pass through network connection.Exchange microgrid
Controller passes through network connection with exchanging each current transformer inside micro-capacitance sensor；Inside direct-current micro-grid controller and direct-current grid
Each current transformer pass through network connection.
The network connection is to follow the network connection of IEC 61850/GOOSE.
The multilevel converter MMC of the utility model, it is sagging using DC voltage（Outer shroud）+ current control（Inner ring）Control
Structure, controls 10kV DC voltage stabilities and power-balance, can realize 380V exchange micro-capacitance sensors and DC distribution center ±
The flexible interconnection of 10kV dc bus, the multilevel converter MMC possesses improves failure including DC Line Fault suppression
Disposal ability.
The utility model uses DC converter DBA, it can realize ± 375V direct-current grids and ± 10k dc bus
Flexible interconnection, realize that the high_voltage isolation of two straight-flow systems of high-low pressure, the double-direction control of power and direct-current grid direct current are female
The control function of line voltage, DBA possess the ability for adapting to distribution output power and voltage wide range change.
The DC distribution central control system of the utility model, it, which exchanges piconet controller, can coordinate the micro- electricity of control exchange
Each generator unit and power unit in net, the flow of power of dynamic adjustment exchange micro-grid connection point.
Direct-current micro-grid controller can be coordinated to control each generator unit and power unit in direct-current grid, and dynamic is adjusted
The flow of power of straightening stream micro-grid connection point.
Middle straightening stream distribution center is real by mutually coordinated between exchange piconet controller, direct-current micro-grid controller
When adjust the power of each exchange feeder line and micro-capacitance sensor generator unit, and the working status of each MMC and DBA is realized in DC distribution
Intracardiac power-balance, maintains DC bus-bar voltage in the reasonable scope.
Load unit and generator unit can plug and play, be easy to top level control system compatible；It is mutual that more power grids can be improved
The stability contorting and optimization for contacting system are run.
1 pair of technical solutions of the utility model is further detailed below in conjunction with the accompanying drawings：
Multilevel converter is also referred to as AC/DC converter in the present embodiment.
As shown in the figure, embodiment constructs four end DC distribution centers, I is returned into 10kV AC distributions net, II returns 10kV exchanges
Distribution network line, exchange the MMC of micro-capacitance sensor and direct-current grid respectively by 2 sets of capacity for 1MVA（MMC#1 and MMC#2）, 1 set
The DC converter DBA flexible interconnections that MMC#3 and 1 set of capacity that capacity is 500kVA is 500kW are mixed into an alternating current-direct current
Distribution system.Wherein I goes back to 10kV alternating current circuits and passes through isolating transformer and multilevel converter #1（Hereinafter referred to as MMC#1）Access
± 10kV dc bus, II go back to 10kV alternating current circuits and pass through isolating transformer and MMC#2 access ± 10kV dc bus.III is returned
380V exchange micro-capacitance sensors pass through isolating transformer and MMC#3 access ± 10kV dc bus.IV returns 750V direct-current grids and passes through
DBA DC converters access ± 10kV dc bus.
Middle straightening flow center control unit by communication protocol with exchanging piconet controller, DC micro-electric net controller leads to
Letter, according to the state of the medium voltage DC pressure of monitoring, real time down control instruction is to exchange piconet controller, DC micro-electric network control
Device processed, is controlled in real time.
Middle straightening flow center control unit is connected by communication protocol with MMC#1#2#3 and DBA, according to exchange microgrid control
The real-time status of device, DC micro-electric net controller and medium voltage DC pressure, controls MMC#1#2#3 and DBA operations, in normal condition
With the balance and Optimized Operation that power is realized under malfunction, the stabilization of guarantee medium voltage DC pressure.
Exchange piconet controller is led to by communication protocol and subordinate's energy accumulation current converter #1#2, wind generator system, charger
Letter, according to the instruction of middle straightening flow center control unit, control exchanges the fortune of each generator unit and power unit in micro-capacitance sensor
Row state and performance number.
Exchange micro-capacitance sensor includes stand-by power supply #1, wind generator system, ternary battery, lead-acid battery and off-board charging
Machine etc. accesses element；Energy accumulation current converter #1 and energy accumulation current converter #2 are connected with lead-acid battery and ternary battery.
Direct-current grid includes the access such as carbonic acid lithium iron battery, lead-acid battery, polysilicon, monocrystalline silicon, off-board charger
Element, energy accumulation current converter #1, energy accumulation current converter #2, photovoltaic converter #2 and photovoltaic converter #1 respectively with carbonic acid lithium iron battery,
Lead-acid battery, polysilicon, monocrystalline silicon connection.
Claims (4)
1. a kind of DC distribution central control system, it includes exchange piconet controller, it is characterised in that：The exchange microgrid control
Pass through network connection between device processed, direct-current micro-grid controller and middle straightening flow center control unit；AC distribution net becomes with isolating
Depressor connects, and isolating transformer is connected with multilevel converter, and multilevel converter is connected with dc bus；Exchange micro-capacitance sensor leads to
Cross multilevel converter MMC to be connected with dc bus, direct-current grid is connected by DC converter DBA with dc bus.
A kind of 2. DC distribution central control system according to claim 1, it is characterised in that：It is multilevel converter, straight
Current converter DBA passes through network connection with middle straightening flow center control unit.
A kind of 3. DC distribution central control system according to claim 1, it is characterised in that：Exchange piconet controller with
Each current transformer inside exchange micro-capacitance sensor passes through network connection；Direct-current micro-grid controller and each change inside direct-current grid
Stream device passes through network connection.
A kind of 4. DC distribution central control system according to claim 1,2 or 3, it is characterised in that：The network connects
It is connected in the network connection for following IEC 61850/GOOSE.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720962818.0U CN207339264U (en) | 2017-08-03 | 2017-08-03 | A kind of DC distribution central control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720962818.0U CN207339264U (en) | 2017-08-03 | 2017-08-03 | A kind of DC distribution central control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207339264U true CN207339264U (en) | 2018-05-08 |
Family
ID=62378350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720962818.0U Active CN207339264U (en) | 2017-08-03 | 2017-08-03 | A kind of DC distribution central control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207339264U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110707740A (en) * | 2019-10-09 | 2020-01-17 | 天津大学 | Multi-microgrid flexible direct-current interconnection system with switch array |
| US10819112B1 (en) | 2019-03-27 | 2020-10-27 | Abb Schweiz Ag | Feeder line fault response using direct current interconnection system |
| CN112448388A (en) * | 2020-11-04 | 2021-03-05 | 南方电网科学研究院有限责任公司 | Control method of power conversion and supply system based on parallel connection of intelligent soft switch and interconnection switch |
| US10971934B2 (en) | 2018-12-31 | 2021-04-06 | Abb Schweiz Ag | Distribution networks with flexible direct current interconnection system |
| US11031773B2 (en) | 2019-03-27 | 2021-06-08 | Abb Power Grids Switzerland Ag | Transformer isolation response using direct current link |
| US11121543B2 (en) | 2018-12-31 | 2021-09-14 | Abb Schweiz Ag | Fault mitigation in medium voltage distribution networks |
-
2017
- 2017-08-03 CN CN201720962818.0U patent/CN207339264U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10971934B2 (en) | 2018-12-31 | 2021-04-06 | Abb Schweiz Ag | Distribution networks with flexible direct current interconnection system |
| US11121543B2 (en) | 2018-12-31 | 2021-09-14 | Abb Schweiz Ag | Fault mitigation in medium voltage distribution networks |
| US10819112B1 (en) | 2019-03-27 | 2020-10-27 | Abb Schweiz Ag | Feeder line fault response using direct current interconnection system |
| US11031773B2 (en) | 2019-03-27 | 2021-06-08 | Abb Power Grids Switzerland Ag | Transformer isolation response using direct current link |
| CN110707740A (en) * | 2019-10-09 | 2020-01-17 | 天津大学 | Multi-microgrid flexible direct-current interconnection system with switch array |
| CN112448388A (en) * | 2020-11-04 | 2021-03-05 | 南方电网科学研究院有限责任公司 | Control method of power conversion and supply system based on parallel connection of intelligent soft switch and interconnection switch |
| CN112448388B (en) * | 2020-11-04 | 2022-02-22 | 南方电网科学研究院有限责任公司 | Control method of power conversion and supply system based on parallel connection of intelligent soft switch and interconnection switch |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207339264U (en) | A kind of DC distribution central control system | |
| CN103595063B (en) | A kind of energy accumulation current converter and battery energy storage system thereof | |
| CN110601248B (en) | Multi-mode coordination control method of annular alternating current-direct current hybrid micro-grid system | |
| CN110970922A (en) | Alternating current-direct current hybrid distributed renewable energy system | |
| CN101944750B (en) | Implementation method of flexible intelligent direct current electric local area network electric power system | |
| CN104578132A (en) | Electric power collector system for alternating-current and direct-current microgrid | |
| CN109617147B (en) | Power electronic transformer operation strategy optimization combination method | |
| CN202957612U (en) | Wind and photovoltaic power storage intelligent microgrid and control system thereof | |
| CN110350562A (en) | A kind of energy-accumulating power station | |
| CN108347067A (en) | A kind of microgrid framework and control method containing battery energy storage and generator | |
| CN115811128A (en) | Medium-low voltage flexible interconnection coordination control system, method, equipment and medium | |
| CN105207260B (en) | Angle-style three-phase alternating current tandem photovoltaic square formation | |
| CN108281987A (en) | A kind of energy source router applied to island microgrid | |
| CN209488190U (en) | Multi-purpose station electric system | |
| CN204103855U (en) | Tandem photovoltaic square formation | |
| WO2017132802A1 (en) | Inverter control device and method for energy interconnection and energy storage of ac bus | |
| CN110365005A (en) | A kind of Virtual Controller for direct current micro-grid system | |
| CN203135466U (en) | A micro-grid system containing a bidirectional inverter | |
| CN109671344A (en) | A kind of topological structure for direct current transmission and distribution constructional dynamic simulation experimental system | |
| Wang | A review of microgrid research | |
| CN103178547A (en) | Micro-network system with two-way inverter, and operating method of micro-network system | |
| CN208158135U (en) | A kind of microgrid framework containing battery energy storage and generator | |
| CN208174270U (en) | A kind of micro-grid system | |
| CN207782430U (en) | A kind of energy source router applied to island microgrid | |
| CN111697586A (en) | Plug-and-play household energy router |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |