CN205544303U - Mixed type unified power flow controller - Google Patents
Mixed type unified power flow controller Download PDFInfo
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- CN205544303U CN205544303U CN201620173258.6U CN201620173258U CN205544303U CN 205544303 U CN205544303 U CN 205544303U CN 201620173258 U CN201620173258 U CN 201620173258U CN 205544303 U CN205544303 U CN 205544303U
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- 239000003990 capacitor Substances 0.000 claims abstract description 30
- 230000005540 biological transmission Effects 0.000 claims abstract description 16
- 238000004804 winding Methods 0.000 claims abstract description 9
- 230000005611 electricity Effects 0.000 claims description 18
- 230000009471 action Effects 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 3
- 230000005012 migration Effects 0.000 description 22
- 238000013508 migration Methods 0.000 description 22
- 230000008447 perception Effects 0.000 description 10
- 102100024841 Protein BRICK1 Human genes 0.000 description 7
- 101710084314 Protein BRICK1 Proteins 0.000 description 7
- 230000002441 reversible effect Effects 0.000 description 6
- 230000006870 function Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000001939 inductive effect Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009711 regulatory function Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000009514 concussion Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004899 motility Effects 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Abstract
The utility model provides a mixed type unified power flow controller, including reactor unit, capacitor unit, first transverter, second transverter, series transformer and shunt transformer, reactor unit and capacitor unit put in series among the transmission line, the reactor both ends switching device that connects in parallel, the 2nd switching device connects in parallel at the condenser both ends, first transverter is connected with the second transverter, and the other end of this first transverter inserts series transformer, and the other end of this second transverter inserts shunt transformer, series transformer's opposite side winding and transmission line are connected, three parallelly connected switching device on this opposite side winding. Compared with the prior art, the utility model provides a pair of mixed type unified power flow controller can show the required capacity of reduction transverter, practices thrift the cost, possesses the function of current -limiting simultaneously.
Description
Technical field
This utility model relates to electric and electronic technical field, is specifically related to a kind of mixed type THE UPFC.
Background technology
Along with greatly developing of power system, the scale of new forms of energy accesses, grid structure complexity, trend skewness, electricity day by day
The problems such as pressure enabling capabilities is not enough bring new challenge to the safe and stable operation of electrical network.Some areas occur in that power supply bottleneck,
Load development need can not be met.From the point of view of electrical network practical situation, trend skewness be restriction electric network transportation ability important because of
Element.Tradition electrical network lacks effective power flow regulating means, by using novel FACTS (Flexible Alternative Current
Transmis System) device improves system conditions, and improve electrical network transmission capacity and be a reality and preferably select.
THE UPFC (Unified Power Flow Controller, UPFC) as the representative of the 3rd generation FACTS equipment,
It is function the most comprehensive FACTS device up to now, can separately or concurrently realize shunt compensation, series compensation, phase shift and end electricity
The multiple basic functions such as pressure regulation.UPFC can realize power flow regulating in terms of power system stability, conservative control active power,
Reactive power, improves the conveying capacity of circuit, it is achieved optimizes and runs；Can be handled up by fast reactive at dynamic aspect again, dynamic
State supports the voltage of access point, improves system voltage stability；System damping can also be improved, improve power-angle stability.
Conventional THE UPFC controls flexible function and remarkable, but it is promoted the use of in power system and does not possess capacity and valency
Lattice advantage.Traditional capacitor, reactor can be as circuit series compensations, but motility and speed of action all can not meet accurately tune
The requirement of joint.THE UPFC needs functional configuration more flexibly, needs to tie series compensation with THE UPFC
Altogether.
Utility model content
In order to meet the needs of prior art, this utility model provides a kind of mixed type THE UPFC.
The technical solution of the utility model is:
Described THE UPFC includes that reactor unit, capacitor unit, the first inverter, the second inverter, series connection become
Depressor and shunt transformer；
Described reactor unit and capacitor unit series connection access in transmission line of electricity；Described reactor unit include a reactor or
Multiple reactors of person's series connection, described reactor is parallel with the first switching device；Described capacitor unit includes a capacitor
Or by the series connection of multiple capacitors and the Capacitor banks formed in parallel, described capacitor is parallel with second switch device；
Described first inverter and the second inverter connect, and the other end of this first inverter accesses described series transformer, and this is the years old
The other end of two inverters accesses described shunt transformer；
The opposite side winding of described series transformer is connected with described transmission line of electricity, the 3rd switching device in parallel on this opposite side winding.
The preferred embodiment that this utility model provides is:
4th switching device in parallel on described second inverter；Described 3rd switching device and the 4th switching device stand-by provision each other,
When either switch device generation tripping in the 3rd switching device and the 4th switching device, another switching device action.
The preferred embodiment that this utility model provides is:
Described first switching device, second switch device, the 3rd switching device and the 4th switching device include mechanical switch or electricity
Power electrical switch.
The preferred embodiment that this utility model provides is: described first switching device, second switch device, the 3rd switch dress
Putting and all include mechanical switch and electronic power switch with the 4th switching device, this mechanical switch and electronic power switch are in parallel.
The preferred embodiment that this utility model provides is: described electronic power switch includes antiparallel two IGCTs.
The preferred embodiment that this utility model provides is: described electronic power switch includes all-controlling power electronics device, should
All-controlling power electronics device uses any one in IGBT, GTO, IGCT and SIC.
The preferred embodiment that this utility model provides is: described first inverter and the second inverter all use H bridge cascade connection type
In inverter, MMC type inverter, diode clamp bit-type inverter and striding capacitance type inverter any one.
Compared with immediate prior art, the beneficial effects of the utility model are:
1, a kind of mixed type THE UPFC that this utility model provides, it is possible to realize capacitive, perception bidirectional compensating, compensate
Pattern can switch rapidly according to system requirements；
2, a kind of mixed type THE UPFC that this utility model provides, by reactor, capacitor and full-control type power electronic
Inverter combines, it is only necessary to less inverter capacity can realize large-scale capacitive compensation and inductive compensation；
3, a kind of mixed type THE UPFC that this utility model provides, can be run in difference by the configuration of switching device
Mixed type THE UPFC is effectively protected under operating mode；
4, a kind of mixed type THE UPFC that this utility model provides, it is possible to significantly reduce inverter desired volume, saves
Cost, is provided simultaneously with the function of current limliting.
Accompanying drawing explanation
Fig. 1: a kind of mixed type THE UPFC structural representation in this utility model embodiment；
Fig. 2: another kind of mixed type THE UPFC structural representation in this utility model embodiment；
Fig. 3: use thyristor switch and the mixed type THE UPFC structural representation of mechanical switch in this utility model embodiment
Figure；
Fig. 4: the equivalent circuit diagram of capacitive compensation in this utility model embodiment；
Fig. 5: the equivalent circuit diagram of inductive compensation in this utility model embodiment.
Detailed description of the invention
For making the purpose of this utility model embodiment, technical scheme and advantage clearer, implement below in conjunction with this utility model
Accompanying drawing in example, clearly and completely illustrates the technical scheme in this utility model embodiment, it is clear that described reality
Executing example is a part of embodiment of this utility model rather than whole embodiments.Based on the embodiment in this utility model, ability
The every other embodiment that territory those of ordinary skill is obtained under not making creative work premise, broadly falls into this utility model
The scope of protection.
This utility model provide a kind of mixed type THE UPFC embodiment as illustrated in fig. 1 and 2, particularly as follows:
As it is shown in figure 1, in the present embodiment this THE UPFC include reactor unit, capacitor unit, the first inverter,
Second inverter, series transformer and shunt transformer.Wherein,
1.: reactor unit series connection accesses in transmission line of electricity, and reactor unit includes multiple reactance of a reactor or series connection
Device, each reactor two ends are parallel with the first switching device.
2.: capacitor unit series connection accesses in transmission line of electricity, and capacitor unit includes a capacitor or by multiple capacitor strings
Connection and the Capacitor banks formed in parallel, each capacitor two ends are parallel with second switch device.
3.: the first inverter and the second inverter connect, the other end of this first inverter accesses series transformer, and this second changes
The other end of stream device accesses shunt transformer.I.e. first inverter is connected in parallel on the winding two ends, side of series transformer, series-transformer
The opposite side winding of device and the 3rd switching device are in parallel, it is possible to achieve protection device or the function of extractor.As in figure 2 it is shown,
The two ends of the first inverter can also be parallel with the 4th switching device, the 3rd switching device and the 4th switching device stand-by provision each other,
In the two during either switch device generation tripping, another switching device action.
In the present embodiment, inverter uses H bridge cascade current converter, MMC type inverter, diode clamp bit-type inverter and flies
In capacitor type inverter any one.
In the present embodiment, the structure of the first switching device, second switch device, the 3rd switching device and the 4th switching device includes two
Type:
The first: the first switching device, second switch device, the 3rd switching device and the 4th switching device use mechanical switch or
Person's electronic power switch.
The second: the first switching device, second switch device, the 3rd switching device and the 4th switching device all include mechanical switch
With electronic power switch, this mechanical switch and electronic power switch are in parallel.
In above two type structure, electronic power switch all includes two power electronic devices of reverse parallel connection.Electricity in the present embodiment
Power electric device can use half control type power electronic devices can also use all-controlling power electronics device: half control type power electronic
Device uses IGCT, and all-controlling power electronics device uses any one in IGBT, GTO, IGCT and SIC.
It should be noted that this utility model is not noted for protecting electric capacity, series transformer, inverter and switching device
The equipment such as spark gap, gap, do not indicate that device manufacture and design and engineering actual implement time, there are not these equipment.Meanwhile, real
During the engineering construction of border, have many isolation switch, chopper, current measure device, voltage measuring apparatus.The most do not draw
, when not indicating that the actual enforcement of engineering, there are not these equipment in these equipment.
In this utility model, the mode of operation of mixed type THE UPFC includes capacitive migration pattern and perception migration
Pattern, the capacitive compensation of transmission line of electricity defined in the present embodiment is that forward compensates, and inductive compensation is Contrary compensation；
1.: capacitive migration pattern
When the first switching device closes, when second switch device and the 3rd switching device disconnect, THE UPFC works in appearance
Property migration pattern.Capacitor unit provides the steady-state operation operating point of a forward migration, and inverter provides dynamic duty model
Enclose, so that the span of control that series side compensates significantly increases.
By adjusting the capacitance in capacitor unit or the connection in series-parallel quantity of capacitor, regulate steady-state operation operating point, even if
Obtain this THE UPFC and possess classification regulatory function.
2.: perception migration pattern
When second switch device closes, when the first switching device and the 3rd switching device disconnect, THE UPFC works in sense
Property migration pattern.Reactor unit provides the steady-state operation operating point of a reserve migration, and inverter provides dynamic duty model
Enclose, so that the span of control that series side compensates significantly increases.
By adjusting inductance value or the connection in series-parallel quantity of capacitor of reactor in reactor unit, regulate steady-state operation operating point,
This THE UPFC is i.e. made to possess classification regulatory function.
The mode of operation of THE UPFC is not limited only to simple capacitive migration pattern and perception migration pattern, and
Present a kind of inclined capacitive or partially perceptual complicated compensation characteristic.
This utility model is carried out as a example by the mixed type THE UPFC using thyristor switch and mechanical switch shown in Fig. 3
Explanation.In the present embodiment, the first switching device, second switch device and the 3rd switching device are opened by mechanical switch and power electronics
Pass composes in parallel, wherein:
First switching device includes the IGCT THY11 and IGCT THY12 of mechanical switch BRK1, reverse parallel connection；
Second switch device includes the IGCT THY21 and IGCT THY22 of mechanical switch BRK2, reverse parallel connection；
3rd switching device includes the IGCT THY31 and IGCT THY32 of mechanical switch BRK3, reverse parallel connection.
In the present embodiment, the work process of mixed type THE UPFC is:
1, the non-access system of mixed type THE UPFC
Before mixed type THE UPFC access system 1 and system 2, mechanical switch BRK1, mechanical switch BRK2, machine
Tool switch BRK3 all closes, and whole mixed type THE UPFC series side is in bypass condition, not to system initial launch
State has any impact.
2, mixed type THE UPFC access system
(1) capacitive migration pattern
If the reactance of long distance transmission line is bigger, the reactance of transmission line of electricity can be compensated by sealing in electric capacity, reduce transmission and damage
Consumption.Therefore by mixed type THE UPFC access system 1 and system 2, and control it and work in capacitive migration pattern:
Guan Bi mechanical switch BRK1, disconnects mechanical switch BRK2 and mechanical switch BRK3, the equal locking of IGCT, is now
System equivalent circuit is as shown in Figure 4.The conventional THE UPFC of inverter and series transformer composition can be operated in perception partially
Move under compensation model, thus reserved bigger forward compensation ability, at system jam, need to improve the field of transient stability
Can the most at utmost reduce the equivalent reactances such as circuit under scape, improve transient stability limit, and mended by this routine Static Synchronous
System concussion is damped by the dynamically control repaying device.
(2) capacitive migration pattern switches to perception migration pattern
If mixed type THE UPFC works in capacitive migration pattern, transmission line of electricity overcurrent occurs, then controls electricity
The IGCT THY21 and IGCT THY22 at container two ends, and the winding two ends, side of series transformer access transmission line of electricity
IGCT THY31 and IGCT THY32 turn on rapidly, simultaneously control mechanical switch BRK2 and mechanical switch BRK3 close
Close, by switching device bypass capacitor, series transformer to protect mixed type THE UPFC.Disconnect mechanical switch
BRK1, puts into reactor and carries out current limliting.
Changing method: the IGCT THY21 and IGCT THY22 at electric conduction container two ends rapidly, is closed at mechanical switch
BRK2, disconnects mechanical switch BRK1, it is achieved capacitive migration pattern switches to perception migration pattern.
In the present embodiment, in Fig. 3, non-corresponding diagram 2 marks the 4th switching device.If mixed type THE UPFC is applied to relatively
When in voltage levels, i.e. series transformer, inverter side voltage is less than system side voltage, the action of the 4th switching device in principle
Speed can be faster than the 3rd switching device, now increases by the 4th switching device and includes the IGCT of mechanical switch BRK4, reverse parallel connection
THY41 and IGCT THY42, when passing by stream online, the IGCT THY41 and IGCT THY42 of reverse parallel connection lead rapidly
Logical, inverter is bypassed to protect inverter.
(3) perception migration pattern
Overload is caused due to reasons such as short trouble or load increase, parallel line tripping operations when transmission line of electricity, when needing current limliting,
Guan Bi mechanical switch BRK2, disconnects mechanical switch BRK1 and mechanical switch BRK3, the equal locking of IGCT, now system etc.
Value circuit is as shown in Figure 5.The conventional STATCOM of inverter and series transformer composition can be operated in capacitive skew and mend
Repay under pattern, thus reserved bigger Contrary compensation ability.
(4) perception migration pattern switches to capacitive migration pattern
Turn on rapidly the IGCT THY11 and IGCT THY12 at reactor two ends, be closed at mechanical switch BRK1, disconnect
Mechanical switch BRK2, it is achieved perception migration pattern switches to capacitive migration pattern.
It should be noted that the situation sealing in inductance and electric capacity is not limited to the structure shown in embodiment, any by being increased or decreased
Inductance and electric capacity realize the situation of series compensation on a large scale, within the scope of broadly falling into this utility model.Unified Power Flow controls also
Connection side may be coupled to the bus of this circuit can also be connected to All other routes, within the scope of broadly falling into this utility model.
Obviously, those skilled in the art can carry out various change and modification without deviating from of the present utility model to this utility model
Spirit and scope.So, if these amendments of the present utility model and modification belong to this utility model claim and equivalent skill thereof
Within the scope of art, then this utility model is also intended to comprise these change and modification.
Claims (7)
1. a mixed type THE UPFC, it is characterised in that described THE UPFC includes reactor unit, electricity
Container unit, the first inverter, the second inverter, series transformer and shunt transformer；
Described reactor unit and capacitor unit series connection access in transmission line of electricity；Described reactor unit include a reactor or
Multiple reactors of person's series connection, described reactor is parallel with the first switching device；Described capacitor unit includes a capacitor
Or by the series connection of multiple capacitors and the Capacitor banks formed in parallel, described capacitor is parallel with second switch device；
Described first inverter and the second inverter connect, and the other end of this first inverter accesses described series transformer, and this is the years old
The other end of two inverters accesses described shunt transformer；
The opposite side winding of described series transformer is connected with described transmission line of electricity, the 3rd switching device in parallel on this opposite side winding.
2. a kind of mixed type THE UPFC as claimed in claim 1, it is characterised in that
4th switching device in parallel on described second inverter；Described 3rd switching device and the 4th switching device stand-by provision each other,
When either switch device generation tripping in the 3rd switching device and the 4th switching device, another switching device action.
3. a kind of mixed type THE UPFC as claimed in claim 1, it is characterised in that
Described first switching device, second switch device, the 3rd switching device and the 4th switching device include mechanical switch or electricity
Power electrical switch.
4. a kind of mixed type THE UPFC as claimed in claim 1, it is characterised in that described first switching device,
Second switch device, the 3rd switching device and the 4th switching device all include mechanical switch and electronic power switch, this mechanical switch
In parallel with electronic power switch.
5. a kind of mixed type THE UPFC as described in claim 3 or 4, it is characterised in that described power electronics is opened
Pass includes antiparallel two IGCTs.
6. a kind of mixed type THE UPFC as described in claim 3 or 4, it is characterised in that described power electronics is opened
Pass includes all-controlling power electronics device, and this all-controlling power electronics device uses in IGBT, GTO, IGCT and SIC arbitrary
Kind.
7. mixed type THE UPFC as claimed in claim 1 a kind of, it is characterised in that described first inverter and the
Two inverters all use H bridge cascade current converter, MMC type inverter, diode clamp bit-type inverter and striding capacitance type to change
Flow any one in device.
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|---|---|---|---|
| CN201620173258.6U CN205544303U (en) | 2016-03-08 | 2016-03-08 | Mixed type unified power flow controller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105703376A (en) * | 2016-03-08 | 2016-06-22 | 全球能源互联网研究院 | Mixed type unified power flow controller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105703376A (en) * | 2016-03-08 | 2016-06-22 | 全球能源互联网研究院 | Mixed type unified power flow controller |
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