CN107681663A - Switching device and the Distributed Power Flow coordinated with fault current limiter control transmission line of electricity - Google Patents
Switching device and the Distributed Power Flow coordinated with fault current limiter control transmission line of electricity Download PDFInfo
- Publication number
- CN107681663A CN107681663A CN201710841638.1A CN201710841638A CN107681663A CN 107681663 A CN107681663 A CN 107681663A CN 201710841638 A CN201710841638 A CN 201710841638A CN 107681663 A CN107681663 A CN 107681663A
- Authority
- CN
- China
- Prior art keywords
- split conductors
- split
- switching device
- transferred
- conductors
- 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.)
- Pending
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
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The Distributed Power Flow coordinated the invention discloses a kind of switching device and with fault current limiter controls transmission line of electricity, the electric current that N split conductors convey is transferred on N+1 split conductors by switching device, or the electric current for conveying N+1 split conductors is transferred on N split conductors, N >=2.The electric current that switching device can convey N split conductors is transferred on N+1 split conductors, or the electric current for conveying N+1 split conductors is transferred on N split conductors, expand the adjustable range of line impedance, so as to change Line Flow direction, play a part of power flowcontrol, it is simple in construction.Distributed Power Flow control transmission line of electricity has the function of load disturbance, coordinates with fault current limiter and runs, can more preferably control fault current excessive problem.
Description
Technical field
The Distributed Power Flow coordinated the present invention relates to a kind of switching device and with fault current limiter controls transmission line of electricity, belongs to
Electrical engineering field.
Background technology
Cause the extensive concern of people after being proposed from the concept of THE UPFC (UPFC) immediately, both at home and abroad in succession
Research and develop various tidal current controllers.It is universal that the early stage external engineering to put into operation all continues early stage Survey of Flexible AC Transmission System (FACTS) field
What is used carries out three-phase voltage source inverter unit by transformer the multiplex topology of phase shift superposition, while uses device string
Connection and diode clamp bit-type three-level converter technology.And the series connection of switching device, three level, multiplex and modular technology
Combination further improve waveform quality, to using fundamental frequency modulation the full-controlled switch device of Large Copacity at a slow speed it is very applicable,
Also have using breaker and mechanical switch, without the current control device of application full-controlled device design, such as domestic patent
The current controller that Application No. 200480044679.9 designs.
But being continuously increased with flow controller capacity, increasing full-controlled device are employed so that device is whole
Body structure is lengthy and jumbled, control difficulty increases, and reliability is greatly reduced.
In addition, with the sharp increase of power system transmission capacity, the network architecture more sophisticated of Power System Interconnection, power networks at different levels
In, particularly the big load center Beijing-Tianjin pool in China three, Yangtze River Delta, the short circuit current level of Delta of Pearl River constantly increase
Add.The short circuit current of some areas has reached 70kA in system, has exceeded the rupturing capacity of breaker, and ascendant trend
It is increasingly faster, the safe operation of serious threat to system.Once generation short trouble, it is likely to result in phase in faulty line
Burning for equipment is closed, consequence is difficult to imagine.Short circuit current it is exceeded, great prestige is formed to the safety and stability of operation of power networks
The side of body, it has also become one of subject matter that bulk power grid is planned and operation is paid close attention to.Solves the exceeded measure of fault current, mainly including two
The method of individual level, the first level are from system architecture, such as bus fanout operation；Another level is gone out from design factors
Hair, fault current limiter is researched and developed, the magneto-restrictive fault current limiter designed such as number of patent application 201420592857.2.
The content of the invention
In order to solve above-mentioned power flowcontrol and fault current excessive problem, the invention provides a kind of switching device and with therefore
Hinder the Distributed Power Flow control transmission line of electricity that current limiter coordinates.
In order to achieve the above object, the technical solution adopted in the present invention is：
Switching device, it is characterised in that：The electric current that N split conductors convey is transferred on N+1 split conductors, or by N+
The electric current of 1 split conductor conveying is transferred on N split conductors, N >=2.
It is by the switching device concrete structure that the electric current that N split conductors convey is transferred on N+1 split conductors,
Throwing unit is cut including collector-shoe gear and N+1, the input of collector-shoe gear connects the N root wires of N split conductors,
The output end of collector-shoe gear is cut throwing unit input with N+1 and is connected, and the N+1 output ends connection N+1 divisions for cutting throwing unit are led
The N+1 root wires of line.
It is by the switching device concrete structure that the electric current that N+1 split conductors convey is transferred on N split conductors,
Including collector-shoe gear and it is N number of cut throwing unit, the N+1 roots of the input connection N+1 split conductors of collector-shoe gear are led
Line, the output end of collector-shoe gear are connected with N number of throwing unit input of cutting, N number of output end connection N split conductors for cutting throwing unit
N root wires.
Cutting throwing unit includes bidirectional thyristor, RC loops and switch in parallel.
Switch as mechanical switch.
Transmission line of electricity, including T power transmission tower are controlled with the Distributed Power Flow that fault current limiter coordinates, T >=2, first defeated
First switch device is installed, the electric current that N split conductors convey is transferred to N+1 split conductors by first switch device on electric tower
On, the input connection N split conductors of first switch device, the output end connection N+1 split conductors of first switch device, T
Second switch device is installed, the electric current that N+1 split conductors convey is transferred to N divisions and led by second switch device on individual power transmission tower
On line, the input connection N+1 split conductors of second switch device, the output end connection N split conductors of second switch device, the
N+1 split conductors, T-1 >=t >=1 are connected between t power transmission tower and the t+1 power transmission tower.
The beneficial effect that the present invention is reached：1st, switching device can turn the electric current that N split conductors convey in the present invention
Move on N+1 split conductors, or the electric current that N+1 split conductors are conveyed is transferred on N split conductors, expands line impedance
Adjustable range, so as to change Line Flow direction, play a part of power flowcontrol, it is simple in construction；2nd, the switch dress of power flowcontrol
Put on the power transmission tower, compared with conventional Load Flow controller, in the absence of floor space it is big the problem of；3rd, used in switching device
Bidirectional thyristor and mechanical switch, rather than full-controlled switch device, therefore reliability is high；4th, Distributed Power Flow control transmission of electricity
Circuit has the function of load disturbance, coordinates with fault current limiter and runs, can more preferably control fault current excessive problem.
Brief description of the drawings
Fig. 1 is the structural representation of switching device；
Fig. 2 is transmission line of electricity principle schematic；
Fig. 3 is the schematic view of the mounting position of switching device；
Fig. 4 is the structural representation of three-phase conductors on quad bundled；
Fig. 5 is the schematic diagram of five split conductors.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.Following examples are only used for clearly illustrating the present invention
Technical scheme, and can not be limited the scope of the invention with this.
As shown in figure 1, switching device, its function are：The electric current that N split conductors convey is transferred on N+1 split conductors,
Or the electric current for conveying N+1 split conductors is transferred on N split conductors, N >=2.
As shown in Fig. 2 the electric current that N split conductors are conveyed is transferred to the switching device concrete structure on N+1 split conductors
For：Throwing unit is cut including collector-shoe gear and N+1, the N root wires of the input connection N split conductors of collector-shoe gear, is confluxed
The output end of device is cut throwing unit input with N+1 and is connected, the N+1 N for cutting the output ends connection N+1 split conductors for throwing unit
+ 1 root wire.
The switching device concrete structure that the electric current that N+1 split conductors convey is transferred on N split conductors is by 3：Including converging
Stream device and it is N number of cut throwing unit, the N+1 root wires of the input connection N+1 split conductors of collector-shoe gear, collector-shoe gear it is defeated
Go out end to be connected with N number of throwing unit input of cutting, N number of N root wires for cutting the output end connection N split conductors for throwing unit.
Collector-shoe gear can use bus-bar, and cutting throwing unit includes bidirectional thyristor, RC loops and switch in parallel；Wherein,
RC loops include the resistance and electric capacity of series connection, switch as mechanical switch.
As shown in Fig. 2 the Distributed Power Flow control transmission line of electricity coordinated with fault current limiter, including T power transmission tower, T >=
2, first switch device is installed on first power transmission tower, specific installation site is as shown in figure 3, first switch device divides N
The electric current of wire conveying is transferred on N+1 split conductors, the input connection N split conductors of first switch device, first switch
The output end connection N+1 split conductors of device, are provided with second switch device on the T power transmission tower, and second switch device is by N+1
The electric current of split conductor conveying is transferred on N split conductors, the input connection N+1 split conductors of second switch device, and second
The output end connection N split conductors of switching device, connect N+1 split conductors between t-th of power transmission tower and the t+1 power transmission tower,
T-1≥t≥1。
In order to verify that the present invention by taking typical 750kV three-phase conductors on quad bundleds in Fig. 4 as an example, A, B, C three-phase, has per phase
Four root wires, sub-conductor axle center are distributed in using R as on the circumference of radius, the connecting line in each sub-conductor and the center of circle divides equally disc
For the quartering.
The distance between three-phase is：Dab=Dbc=0.5Dca=12.8m；
Dab、Dbc、DcaRespectively the distance between the distance between A phases B phases, B phase C phases and the distance between A phase C phases；
The radius of circle and the radius of sub-conductor cross circular section crossed per mutually each sub-conductor axle center be respectively：R=323mm, r
=17.8mm；
Under accidental conditions, each sub-conductor equivalent inductance of conductors on quad bundled is 0.3367Ohm/Km, by conductors on quad bundled
The electric current of conveying is transferred on five split conductors as shown in Figure 5, and each sub-conductor equivalent inductance of five split conductors is
0.3061Ohm/Km
In summary, the division sub-conductor of each phase on switching ultra-high-tension power transmission line (multiple fission conductor), Ke Yigai are passed through
Variable power transmission line impedance, so as to change Line Flow distribution, Simultaneous Switching device is arranged on power transmission tower, is controlled with conventional Load Flow
Device is compared, in the absence of floor space it is big the problem of, and switching device uses bidirectional thyristor and mechanical switch, rather than entirely
Control type switching device, reliability are high.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, some improvement and deformation can also be made, these are improved and deformation
Also it should be regarded as protection scope of the present invention.
Claims (6)
1. switching device, it is characterised in that：The electric current that N split conductors convey is transferred on N+1 split conductors, or by N+1
The electric current of split conductor conveying is transferred on N split conductors, N >=2.
2. switching device according to claim 1, it is characterised in that：The electric current that N split conductors convey is transferred to N+1 points
The switching device concrete structure split on wire is,
Throwing unit is cut including collector-shoe gear and N+1, the N root wires of the input connection N split conductors of collector-shoe gear, is confluxed
The output end of device is cut throwing unit input with N+1 and is connected, the N+1 N for cutting the output ends connection N+1 split conductors for throwing unit
+ 1 root wire.
3. switching device according to claim 1, it is characterised in that：The electric current that N+1 split conductors convey is transferred to N points
The switching device concrete structure split on wire is,
Including collector-shoe gear and it is N number of cut throwing unit, the N+1 root wires of the input connection N+1 split conductors of collector-shoe gear, converge
The output end for flowing device is connected with N number of throwing unit input of cutting, N number of N roots for cutting the output end connection N split conductors for throwing unit
Wire.
4. the switching device according to Claims 2 or 3, it is characterised in that：Cut throw unit include bidirectional thyristor in parallel,
RC loops and switch.
5. switching device according to claim 4, it is characterised in that：Switch as mechanical switch.
6. the Distributed Power Flow control transmission line of electricity coordinated with fault current limiter, it is characterised in that：Including T power transmission tower, T >=2,
First switch device is installed, the electric current that N split conductors convey is transferred to N+1 points by first switch device on first power transmission tower
Split on wire, the input connection N split conductors of first switch device, the output end connection N+1 divisions of first switch device are led
Line, second switch device is installed on the T power transmission tower, the electric current that N+1 split conductors convey is transferred to N by second switch device
On split conductor, the input connection N+1 split conductors of second switch device, the output end connection N divisions of second switch device
Wire, N+1 split conductors, T-1 >=t >=1 are connected between t-th of power transmission tower and the t+1 power transmission tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710841638.1A CN107681663A (en) | 2017-09-18 | 2017-09-18 | Switching device and the Distributed Power Flow coordinated with fault current limiter control transmission line of electricity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710841638.1A CN107681663A (en) | 2017-09-18 | 2017-09-18 | Switching device and the Distributed Power Flow coordinated with fault current limiter control transmission line of electricity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107681663A true CN107681663A (en) | 2018-02-09 |
Family
ID=61137266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710841638.1A Pending CN107681663A (en) | 2017-09-18 | 2017-09-18 | Switching device and the Distributed Power Flow coordinated with fault current limiter control transmission line of electricity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107681663A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103094869A (en) * | 2013-02-16 | 2013-05-08 | 重庆广仁铁塔制造有限公司 | Electric transmission line current circulation intelligent ice melting device of five divided conductors |
| CN203352181U (en) * | 2013-06-17 | 2013-12-18 | 江苏莱宝电力滤波有限公司 | Intelligent capacitor control integration device |
| CN105610158A (en) * | 2016-02-06 | 2016-05-25 | 武汉理工大学 | Distributed power flow controller and control method therefor |
-
2017
- 2017-09-18 CN CN201710841638.1A patent/CN107681663A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103094869A (en) * | 2013-02-16 | 2013-05-08 | 重庆广仁铁塔制造有限公司 | Electric transmission line current circulation intelligent ice melting device of five divided conductors |
| CN203352181U (en) * | 2013-06-17 | 2013-12-18 | 江苏莱宝电力滤波有限公司 | Intelligent capacitor control integration device |
| CN105610158A (en) * | 2016-02-06 | 2016-05-25 | 武汉理工大学 | Distributed power flow controller and control method therefor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Tang et al. | Basic topology and key devices of the five-terminal DC grid | |
| CN105162155B (en) | A kind of series hybrid bipolar direct current transmission system with DC Line Fault ride-through capability | |
| Larruskain et al. | Conversion of AC distribution lines into DC lines to upgrade transmission capacity | |
| CN102938564B (en) | Closed loop power distribution network system based on flexible direct current | |
| CN105048488B (en) | A kind of flexible direct current network DC short trouble traversing method | |
| CN102594243B (en) | Indirect matrix converter multi-machine transmission system and fault-tolerant operation control method thereof | |
| CN101383494A (en) | DC control protection method for line ice melting of extra-high voltage DC transmission system | |
| CN103236710A (en) | Unified power flow controller in modular structure | |
| CN206452122U (en) | Bipolar flexible direct current transmission system and converter station thereof | |
| CN104796025B (en) | A kind of Modularized multi-level converter sub-module topological structure | |
| Zhang et al. | A thyristor based series power flow control device for multi-terminal HVDC transmission | |
| Mourinho et al. | Modeling and analysis of superconducting fault current limiters applied in VSC-HVDC systems | |
| Zhang et al. | Design of main circuit parameters for modular multilevel matrix converter in LFAC system | |
| CN205863870U (en) | A kind of continuously adjustable hybrid DC de-icing device of output voltage electric current | |
| RU2337451C1 (en) | Method of ac three-phase voltage power transmission and system for its implementation | |
| CN107749718B (en) | Railway purifying power supply based on current transfer current limiting and current transfer current limiting method | |
| CN107681663A (en) | Switching device and the Distributed Power Flow coordinated with fault current limiter control transmission line of electricity | |
| CN103001191B (en) | Bus differential protection method and system for flexible direct-current closed-loop intelligent power distribution network | |
| CN202949227U (en) | Convertible static compensator employing modularization multi-level converter structure | |
| Yang et al. | Installation, system-level control strategy and commissioning of the Nanjing UPFC project | |
| Mardani et al. | Fault current limiting in a wind power plant equipped with a DFIG using the interface converter and an optimized located FCL | |
| CN106452110A (en) | Power conversion apparatus and microgrid | |
| CN207625293U (en) | A kind of connection in series-parallel mixed type compensator | |
| CN102722599A (en) | Automatic modeling method of direct current transmission project network topology | |
| CN210744758U (en) | Multi-terminal direct-current transmission system based on superconducting current limiter |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180209 |