CN106602569A - Multiple-operating-state coordinated dispatching method for bus flexible interconnection controller - Google Patents
Multiple-operating-state coordinated dispatching method for bus flexible interconnection controller Download PDFInfo
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- CN106602569A CN106602569A CN201710029240.8A CN201710029240A CN106602569A CN 106602569 A CN106602569 A CN 106602569A CN 201710029240 A CN201710029240 A CN 201710029240A CN 106602569 A CN106602569 A CN 106602569A
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- Prior art keywords
- bus
- interconnection controller
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- power
- state
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
- H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
-
- 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
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
Abstract
The invention relates to a multiple-operating-state coordinated dispatching method for a bus flexible interconnection controller. The multiple-operating-state coordinated dispatching method is characterized in that buses on two sides are interconnected by means of two current transformers in a bus interconnection controller, when only the bus on one side is powered normally, the current transformer connected with the bus on the side is in an outage state if a load on the other side is cut off completely, and the current transformer connected with the bus on the side enters an isolated island power supply mode if the load on the other side is not cut off. The multiple-operating-state coordinated dispatching method solves the problem that a coordinated dispatching method used for a bus flexible controller is limited to active power flow dispatching, realizes coordinated dispatching among the operating states, and further enhances the reliability of the system.
Description
Technical field
The present invention relates to a kind of many running status coordinated scheduling methods of bus flexible interconnection controller, belong to power transmission and distribution skill
Art field.
Background technology
With the progressively foundation of high voltage power transmission rack, and the raising of urban distribution network rack complexity, in its evolution
The electromagnetic looped network between multiple electric pressures will be formed.With the increase of trend, its negative effect is also gradually displayed.In electricity
In magnet ring net, the power transfer that high voltage order one line disconnection causes can increase the conveying capacity of low-voltage circuit, even more than
Its conveying capacity, so as to expand accident scope.And, the method for operation generally there are big short circuit current, trend distribution and safety
The problems such as protection device is complicated, power dispatch system operation and management is difficult, it even becomes the major accident hidden danger of power system, while
Uncertain factor is brought to the development of electrical network.Accordingly, it would be desirable to electromagnetic looped network is carried out unlinking, partition running, but be reduction of
System power supply reliability.
On the other hand, with expanding economy and the quick increase of load type and quantity, distribution network structure structure is increasingly
Complicate, China's big city power distribution network progressively adopts the grid structures such as cable run " 2-1 " looped network, cable run " 3-1 " looped network,
But the impact of the factors such as system short-circuit level is constrained to, typically by the way of closed loop design, open loop operation, to a certain extent
Reduce power supply reliability.Therefore the power supply reliability and power supply quality of power distribution network receives increasing challenge, traditional
AC distribution net has certain limitation in terms of power supply reliability, power supply quality is ensured.
At the same time, the back-to-back inverter based on controllable power electronic devices, the four-quadrant as trend can be realized
Control, and island with power voltage source is provided, turn to supply in the trend for solving conventional AC electrical network and the aspect such as island with power has solely
Special technical advantage, can serve as interconnecting between different buses, has cracked electromagnetic looped network problem, realize flexible Electromagnetic coupling, improve
System operation reliability.
But not yet have systematic study for the coordinated scheduling method for bus flexible interconnection controller, it is rarely seen at present to answer
Asynchronous Interconnection engineering for high-voltage fence coordinates control back-to-back, but is only limitted to effective power flow scheduling, and is directed to and increased electricity
Pressure is supported and the control method for coordinating research of island with power is still immature, it would be highly desirable to solved.
The content of the invention
It is an object of the invention to provide a kind of many running status coordinated scheduling methods of bus flexible interconnection controller, break
Coordinate the limitation that control is only limitted to effective power flow scheduling in prior art, realize the automatic switchover of running status, so as to
Improve transmission and distribution network system reliability.
For achieving the above object, the invention provides a kind of many running status coordinated schedulings of bus flexible interconnection controller
Method, the bus of both sides are interconnected by two current transformers in bus interconnection controller, when only side bussed supply is normal, if
Opposite side load is cut off completely, then the current transformer for corresponding to connection is in stoppage in transit state, if opposite side load is not cut off completely, right
The current transformer that should connect enters island with power pattern.
When two side bus power normal, bus interconnection controller ingoing power scheduling method.
When the bus of bus interconnection controller both sides is in power failure state, bus interconnection controller is in stoppage in transit shape
State.
The bus interconnection controller adopts back-to-back converter.
By the contemplated above technical scheme of the present invention compared with prior art, the present invention has following beneficial effect：This
The dispatching method that invention is provided, when the bussed supply of only side is normal, opposite side enters island with power state as needed,
So that system carries out automatic switchover running status according to bussed supply situation, load power demands and dispatch command, realize mutual
The flexible conversion of the method for operation between connection bus, effectively increases power supply reliability and power supply quality.
Description of the drawings
Fig. 1 is the bus flexible interconnection controller architecture figure using back-to-back converter；
Fig. 2 is a kind of many running status coordinated scheduling schematic diagrams of bus flexible interconnection controller.
Specific embodiment
The technical scheme is that：Bus interconnection controller according to both sides bussed supply situation, load power demands and
Dispatch command carries out state switching, the bus interconnection controller when only side bussed supply is normal, with the side bus interconnection
Current transformer enter the side voltage support operational mode, the bus of opposite side is operated in island with power pattern as needed.
With reference to specific embodiment, the invention will be further described：
The present embodiment median generatrix flexible interconnection controller adopts back-to-back type inverter.As shown in figure 1, bus flexible interconnection
Controller includes two current transformers, and respectively current transformer M and current transformer N is respectively connected to A station ac bus and B stations ac bus,
Realize the flexible interconnection of two side bus.
As shown in Fig. 2 bus flexible interconnection controller refers to according to both sides bussed supply situation, load power demands and scheduling
Order carries out the switching between running status, altogether six kinds of running statuses：Stoppage in transit, power dispatching, A stations voltage support, B stations voltage
Support, A stations island with power, B stations island with power.Heretofore described island with power pattern, is different from isolated island of the prior art
Power supply mode, refers to that the bus for being supplied to region load corresponding to A stations loses power supply capacity, causes region load corresponding to A stations
Island state, the load of described island state is supplied by heretofore described bus flexible interconnection controller
Electricity, B stations island with power is in the same manner.
Coordinated scheduling method between running status is described as follows：
A station buses and B stations bus are likely to occur 3 kinds of power supply states：The power supply of only A stations is normal, the power supply of only B stations is normal and A, B
Power supply of standing is normal.Possible node state scheduling pattern in now having 3：
A (), when only A stations bussed supply is normal, the M side converters for interconnecting of standing with A enter A stations voltage support running status,
Send idle busbar voltage of standing A to be supported；
B (), when only B stations bussed supply is normal, the N side converters for interconnecting of standing with B enter B stations voltage support running status,
Send idle busbar voltage of standing B to be supported；
C (), when A and B stations power normal, the equal startup optimizations of two side converter M and N, integral bus bar flexible interconnection are controlled
Device is stood into A and the power dispatching running status between B stations.
Into after the voltage support state of A stations, the corresponding current transformer M in only A stations runs on reactive power support pattern, now has 3 kinds
Possible node state scheduling pattern：
A (), when A stands dead electricity, bus flexible interconnection controller will be in stoppage in transit state；
B () starts the corresponding N current transformers in B stations when B stations also restore electricity, bus flexible interconnection controller will be stood into A
And the power dispatching running status between B stations；
C () starts the corresponding change in B stations when B stations bus still dead electricity, but its institute need to restore electricity with isolated island load
Stream device N so as to operate under isolated island voltage source mode, into B stations island with power running status.
In the same manner, into after the voltage support state of B stations, the corresponding current transformer N in only B stations runs on reactive power support pattern, now
There are 3 kinds of possible node state scheduling patterns：
A (), when B stands dead electricity, bus flexible interconnection controller will be in stoppage in transit state；
B () starts the corresponding M current transformers in A stations when A stations also restore electricity, bus flexible interconnection controller will be stood into A
And the power dispatching running status between B stations；
C () starts the corresponding change in A stations when A stations bus still dead electricity, but its institute need to restore electricity with isolated island load
Stream device M so as to operate under isolated island voltage source mode, into A stations island with power running status.
Into after the island with power state of A stations, B stations provide energy for A stations by bus flexible interconnection controller as feeder ear
Amount, A stations work in isolated island voltage source mode, now have 2 kinds of possible node state scheduling patterns：
A (), when A stations bus restores electricity, bus flexible interconnection controller is integrally stood into A and the power dispatching between B stations
Running status；
B () switches to B stations voltage support running status when the load excision of A stations need not be powered.
In the same manner, into after the island with power state of B stations, A stations are carried for B stations by bus flexible interconnection controller as feeder ear
Energizing quantity, B stations work in isolated island voltage source mode, now have 2 kinds of possible node state scheduling patterns：
A (), when B stations bus restores electricity, bus flexible interconnection controller is integrally stood into A and the power dispatching between B stations
Running status；
B () switches to A stations voltage support running status when the load excision of B stations need not be powered.
After power dispatching running status between standing into A stations and B, now there are 5 kinds of possible node state scheduling patterns：
A (), when A stations dead electricity equal with B stations bus, bus flexible interconnection controller enters stoppage in transit state；
B () is when A stands bus dead electricity, if turn confession of A stations load need not be carried out, switch to B stations voltage support fortune
Row state；
C (), when A stands bus dead electricity, carry out A stations load if desired turns confession, then into A stations island with power operation shape
State；
D () is when B stands bus dead electricity, if turn confession of B stations load need not be carried out, switch to A stations voltage support fortune
Row state；
E (), when B stands bus dead electricity, carry out B stations load if desired turns confession, then into B stations island with power operation shape
State.
Finally, when bus flexible interconnection controller failure, no matter which kind of running status be in, will all be directly switch into and stop
Fortune state, the safety of safeguards system.
Back-to-back converter of the median generatrix flexible interconnection controller of the present invention using full-control type, according to converter topology not
Together, modularity or cascade connection multi-level topology can be may also be employed using two level topology, clamped multi-level topology.In the present invention
Described power dispatching is the effective power flow scheduling between bus.
The present invention is controlled for bus flexible interconnection using back-to-back inverter, as other embodiment, institute of the present invention
The bus interconnection controller stated can possess polytype, the such as back-to-back inverter of AC/DC/AC forms, such as DC/AC/DC shapes
The face-to-face inverter of formula, and current multi-stage power electronic transformer adopt AC/DC/DC/AC forms, can realize this
The flexible interconnection of the bus under bright dispatching method,
According to such scheme, the present invention is by being transported according to bussed supply situation, load power demands and dispatch command
Row state ground automatically switches, and can realize the coordinated scheduling between each running status, realizes that the trend between inter-bay is mutually supplied, electricity
Pressure is supported and island with power, and then strengthening system reliability, raising quality of voltage.
Specific embodiment is presented above, but the present invention is not limited to described embodiment.The base of the present invention
This thinking is above-mentioned basic scheme, and for those of ordinary skill in the art, various changes are designed in teaching of the invention
The hardware configuration of shape, software flow.Change that without departing from the principles and spirit of the present invention embodiment is carried out,
Modification, replacement and deformation are still fallen within protection scope of the present invention.
Claims (4)
1. many running status coordinated scheduling methods of a kind of bus flexible interconnection controller, it is characterised in that the bus of both sides leads to
The two current transformer interconnections crossed in bus interconnection controller, when only side bussed supply is normal, if opposite side load is cut completely
Remove, then the current transformer for corresponding to connection is in stoppage in transit state, if opposite side load is not cut off completely, the current transformer of corresponding connection enters
Enter island with power pattern.
2. many running status coordinated scheduling methods of bus flexible interconnection controller according to claim 1, its feature exist
In, when two side bus power normal, bus interconnection controller ingoing power scheduling method.
3. many running status coordinated scheduling methods of bus flexible interconnection controller according to claim 1, its feature exist
In when the bus of bus interconnection controller both sides is in power failure state, bus interconnection controller is in stoppage in transit state.
4. many running status coordinated scheduling sides of the bus flexible interconnection controller according to claims 1 to 3 any one
Method, it is characterised in that the bus interconnection controller adopts back-to-back inverter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710029240.8A CN106602569A (en) | 2017-01-16 | 2017-01-16 | Multiple-operating-state coordinated dispatching method for bus flexible interconnection controller |
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| CN201710029240.8A CN106602569A (en) | 2017-01-16 | 2017-01-16 | Multiple-operating-state coordinated dispatching method for bus flexible interconnection controller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107394819A (en) * | 2017-08-24 | 2017-11-24 | 上海交通大学 | Flexible interconnection system and its control method between a kind of transformer station's low-voltage bus bar |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130026841A1 (en) * | 2010-03-23 | 2013-01-31 | Falah Hosini | Voltage Source Converter And A Method For Fault Handling Thereof |
| CN104022499A (en) * | 2014-06-12 | 2014-09-03 | 国家电网公司 | Multiport back-to-back DC-DC converter |
| CN105576716A (en) * | 2016-01-08 | 2016-05-11 | 国网北京市电力公司 | Control parameter acquisition method and device of voltage source converter |
| CN105809265A (en) * | 2014-12-29 | 2016-07-27 | 国家电网公司 | Capacity configuration method of power distribution network flexible interconnection device comprising distributed renewable energy sources |
| CN105978011A (en) * | 2016-04-20 | 2016-09-28 | 华北电力大学 | Flexible partitioned interconnection device steady-state model for power grid dispatching |
| CN106300340A (en) * | 2016-08-30 | 2017-01-04 | 国网河南省电力公司电力科学研究院 | A kind of flexible multimode switching device and control method thereof |
-
2017
- 2017-01-16 CN CN201710029240.8A patent/CN106602569A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130026841A1 (en) * | 2010-03-23 | 2013-01-31 | Falah Hosini | Voltage Source Converter And A Method For Fault Handling Thereof |
| CN104022499A (en) * | 2014-06-12 | 2014-09-03 | 国家电网公司 | Multiport back-to-back DC-DC converter |
| CN105809265A (en) * | 2014-12-29 | 2016-07-27 | 国家电网公司 | Capacity configuration method of power distribution network flexible interconnection device comprising distributed renewable energy sources |
| CN105576716A (en) * | 2016-01-08 | 2016-05-11 | 国网北京市电力公司 | Control parameter acquisition method and device of voltage source converter |
| CN105978011A (en) * | 2016-04-20 | 2016-09-28 | 华北电力大学 | Flexible partitioned interconnection device steady-state model for power grid dispatching |
| CN106300340A (en) * | 2016-08-30 | 2017-01-04 | 国网河南省电力公司电力科学研究院 | A kind of flexible multimode switching device and control method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107394819A (en) * | 2017-08-24 | 2017-11-24 | 上海交通大学 | Flexible interconnection system and its control method between a kind of transformer station's low-voltage bus bar |
| CN107394819B (en) * | 2017-08-24 | 2019-07-30 | 上海交通大学 | Flexible interconnection system and its control method between a kind of substation's low-voltage bus bar |
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