CN108512440A - Current conversion device and bipolar current conversion system - Google Patents
Current conversion device and bipolar current conversion system Download PDFInfo
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- CN108512440A CN108512440A CN201810420438.3A CN201810420438A CN108512440A CN 108512440 A CN108512440 A CN 108512440A CN 201810420438 A CN201810420438 A CN 201810420438A CN 108512440 A CN108512440 A CN 108512440A
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims abstract description 28
- 239000010410 layer Substances 0.000 claims description 29
- 238000001816 cooling Methods 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 230000005611 electricity Effects 0.000 claims description 16
- 239000012212 insulator Substances 0.000 claims description 6
- 230000006855 networking Effects 0.000 claims description 6
- 239000000498 cooling water Substances 0.000 claims description 4
- 239000011229 interlayer Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 13
- 230000008878 coupling Effects 0.000 description 14
- 238000010168 coupling process Methods 0.000 description 14
- 238000005859 coupling reaction Methods 0.000 description 14
- 238000010586 diagram Methods 0.000 description 12
- 230000008859 change Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000005538 encapsulation Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000001727 in vivo Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/007—Plural converter units in cascade
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/325—Means for protecting converters other than automatic disconnection with means for allowing continuous operation despite a fault, i.e. fault tolerant converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a current conversion device and a bipolar current conversion system. The converter comprises a control module and three power modules, wherein each power module comprises a box body and two layers of power modules arranged in the box body, and each layer of power module consists of a plurality of power units which are arranged in a cascade mode; the first connecting terminal of the upper bridge arm and the first connecting terminal of the lower bridge arm are used for being connected with alternating current on one phase in a three-phase high-voltage power transmission system so as to form an alternating current loop with the same phase; the second connecting terminal of the upper bridge arm and the second connecting terminal of the lower bridge arm are connected with the direct-current transmission bus; the control module comprises a valve control controller, and the valve control controller is respectively connected with an upper bridge arm and a lower bridge arm in the three power modules and used for driving power units in the upper bridge arm and the lower bridge arm to work so as to execute electric energy conversion operation between three-phase alternating current and high-voltage direct current in the three-phase high-voltage power transmission system. By adopting the technical scheme in the embodiment of the invention, modular construction of the MMC converter valve can be realized.
Description
Technical field
The present invention relates to power transmission technology field more particularly to a kind of current converter and bipolar commutation systems.
Background technology
The function of converter valve is to execute conversion operation to electric current, for example, alternating current is converted to direct current or by direct current
Electricity is converted to alternating current.Modular multilevel converter valve (Modular Multi-level Control, MMC) is a kind of novel
Voltage change circuit can export very high voltage by the way that the cascade mode of multiple submodule to be superimposed.MMC converter valves have defeated
Go out the features such as harmonic wave is few, the degree of modularity is high, is with a wide range of applications in the power system.In view of converter valve is to work
The requirement of environment, the MMC converter valves for flexible direct-current transmission field usually require to be designed as indoor valve tower structure, still, family
Internal valve tower structure has the characteristics that construction requirement is high, cost is high and long construction period, hinders the popularization and application of MMC converter valves.
Invention content
An embodiment of the present invention provides a kind of current converters and bipolar commutation system, can realize the mould to MMC converter valves
Blockization is built, and is had the characteristics that low construction requirement, low cost and short construction period, is conducive to the popularization and application of MMC converter valves.
In a first aspect, the embodiment of the present invention provides a kind of current converter, which includes control module and three work(
Rate module：
Power module includes babinet and two layers of power modules being installed in babinet, and each layer power modules are set by cascade
The multiple power cells set are constituted, and the power modules for being located at upper layer are lower bridge arm, and the power modules for being located at lower layer are upper bridge arm；
First connecting terminal of upper bridge arm and the first connecting terminal of lower bridge arm, for one in three-phase high-voltage transmission system
Exchange electrical connection in a phase, with the ac circuit of networking same-phase；Second connecting terminal of upper bridge arm and the of lower bridge arm
Two connecting terminals are connect with direct current transportation busbar；
Control module includes valve control controller, valve control controller respectively with the upper bridge arm and lower bridge arm in three power modules
Connection, for driving the power cell in upper bridge arm and lower bridge arm to work, to execute to the three-phase in three-phase high-voltage transmission system
Electric energy conversion operation between alternating current and high voltage direct current.
In a kind of possible embodiment of first aspect, current converter further includes：It is corresponding with three power modules to set
The three reactor pylons set；Wherein, each reactor pylon includes two layers of reactor, and the reactor for being located at upper layer is lower bridge arm
Reactor, the reactor for being located at lower layer is upper bridge arm reactor, and layer is provided between lower bridge arm reactor and upper bridge arm reactor
Between support insulator, be provided with support insulator over the ground between upper bridge arm reactor and ground；The first of upper bridge arm reactor connects
Line terminals are connected with the first connecting terminal of corresponding upper bridge arm, the first connecting terminal and the corresponding lower bridge arm of lower bridge arm reactor
First connecting terminal connects；Second terminals of the second connecting terminal of upper bridge arm reactor and corresponding lower bridge arm reactor
Son, for being electrically connected with the exchange in three-phase high-voltage transmission system in a phase, with the ac circuit of networking same-phase.
In a kind of possible embodiment of first aspect, under the second connecting terminal and correspondence of upper bridge arm reactor
Second connecting terminal of bridge arm reactor is used to connect three-phase high-voltage transmission system with transformer connection, connection transformer is coupled.
In a kind of possible embodiment of first aspect, the top of reactor pylon is provided with tower lid.
In a kind of possible embodiment of first aspect, changing for one or more is installed on side wall of babinet
Hot-air fan；Control module further includes air-cooled controller, and air-cooled controller is connect with the hot-swappable fans.
In a kind of possible embodiment of first aspect, the water cooling tube for cooling power module is installed in babinet
Road, control module further include water dispenser controller, the operating status for controlling cooling water in water cooling pipeline.
In a kind of possible embodiment of first aspect, one or more is also equipped on the head cover of babinet
Air cooling heat exchanger, water dispenser controller are also connect with air cooling heat exchanger.
In a kind of possible embodiment of first aspect, control module setting with three affiliated babinets of power module
In independent another babinet.
Second aspect, the embodiment of the present invention provide a kind of bipolar commutation system, which includes：Two changes of current
Device and control unit；Wherein,
Current converter is current converter as described above, wherein the of the upper bridge arm of the power module of a current converter
Two connecting terminals and positive direct-current transmission of electricity busbar connects, the second connecting terminal of the lower bridge arm of the power module of a current converter and
It is grounded the connection of direct current transportation busbar；
Second connecting terminal of the upper bridge arm of the power module of the negative current converter of another current converter and ground connection direct current
Transmit electricity busbar connection, the second connecting terminal of the lower bridge arm of the power module of another current converter and negative direct current transportation busbar company
It connects；
Two current converters are connected in control unit, control unit is according to the working condition of bipolar commutation system, driving two
One or two in a current converter execute electric energy conversion operation.
In a kind of possible embodiment of second aspect, control unit setting is independent with the affiliated babinet of power module
Another babinet in.
As described above, to realize that the modularization to MMC converter valves is built, the embodiment of the present invention is to each by concatenated power list
The power module that member is constituted has carried out encapsulation design so that each power module is rendered as body structure, and wall is pre- outside the enclosure
The connecting terminal of power cell is stayed.
So set, when needing to build new MMC converter valves, it is only necessary to good power container pre-packaged to three into
Row installation, make these three power containers respectively in three-phase high-voltage transmission system three phases and with direct current transportation busbar
Connection, it will be able to realize the electric energy conversion behaviour between the three-phase alternating current and high voltage direct current in three-phase high-voltage transmission system
Make.Therefore, the current converter in the embodiment of the present invention has the advantages that convenient transportation, easy for construction and construction period are short, is easy to
It promotes the use of.
Description of the drawings
From below in conjunction with the accompanying drawings to the present invention specific implementation mode description in may be better understood the present invention wherein,
Same or analogous reference numeral indicates same or analogous feature.
Fig. 1 is a kind of structural schematic diagram for current converter that first embodiment of the invention provides；
Fig. 2 is the electrical layout figure for the power module that second embodiment of the invention provides；
Fig. 3 is the structural schematic diagram for the current converter that third embodiment of the invention provides；
Fig. 4 is the electrical layout figure for the reactor pylon that fourth embodiment of the invention provides；
Fig. 5 is the structural schematic diagram for the current converter that fifth embodiment of the invention provides；
Fig. 6 is the structural schematic diagram for the bipolar commutation system that sixth embodiment of the invention provides；
Fig. 7 is the circuit topology figure corresponding with the bipolar commutation system in Fig. 6 that seventh embodiment of the invention provides；
Fig. 8 is the structural schematic diagram for the bipolar commutation system that eighth embodiment of the invention provides；
Fig. 9 is the structural schematic diagram for the bipolar commutation system that ninth embodiment of the invention provides.
Reference sign：
101,102,103,1011,1021,1031 be power module；104- control modules；
1041- valve control controllers；1042- air-cooled controllers；1043- water dispenser controllers；
The upper bridge arms of 201-；202- lower bridge arms；203- porcelain bushings；
First connecting terminal of the upper bridge arms of 2011-；Second connecting terminal of the upper bridge arms of 2012-；
First connecting terminal of 2021- lower bridge arms；Second connecting terminal of 2022- lower bridge arms；
301,302,303,3011,3021,3031 be reactor pylon；
The upper bridge arm reactors of 401-；402- lower bridge arm reactors；
First connecting terminal of the upper bridge arm reactors of 4011-；
Second connecting terminal of the upper bridge arm reactors of 4012-；
First connecting terminal of 4021- lower bridge arm reactors；
Second connecting terminal of 4022- lower bridge arm reactors；
403- layer insulation pillars；404- insulation against ground pillars；405- head covers；
501- is coupled one of transformer (positive valve coupling transformer)；
5011- is coupled two (negative valve coupling transformers) of transformer；
The positive current converters of 601- (positive converter valve)；602- bears current converter (negative converter valve)；
603- control units；901- hot-swappable fans.
Specific implementation mode
The feature and exemplary embodiment of various aspects of the invention is described more fully below.In following detailed description
In, it is proposed that many details, in order to provide complete understanding of the present invention.
The embodiment of the present invention provides a kind of current converter and bipolar commutation system, can realize the module to MMC converter valves
Change and build, has the characteristics that low construction requirement, low cost and short construction period, be conducive to the popularization and application of MMC converter valves.Than
Such as, it is suitable for the particular applications such as desert power station, the construction in these application scenario valve Rooms is difficult, construction period required time
It is short, it is badly in need of MMC converter valves open air type and integrated solution.
Fig. 1 is a kind of structural schematic diagram for current converter that first embodiment of the invention provides.As shown in Figure 1, the change of current
Device includes three power module 101-103 and control module 104.
Wherein, three power module 101-103 are respectively with three-phase A, B, the phase connection in C high voltage power transmisson systems.
Power module 101 shown in Fig. 1 is connected with A, and power module 102 is connected with B, and power module 103 is connected with C.Three
A power module is also connected to direct current transportation busbar.
Fig. 2 is the electrical layout figure for the power module that second embodiment of the invention provides.As shown in Fig. 2, each power mould
Block includes babinet and two layers of power modules being installed in babinet.Multiple power lists that each layer power modules are arranged by cascade
Member is constituted, and forms MMC structures, and the power modules for being located at upper layer are lower bridge arm 202, and the power modules for being located at lower layer are upper bridge arm
201.Wherein, power cell can be half-bridge structure, or full bridge structure does not limit herein.
In embodiments of the present invention, the power module of babinet encapsulating structure is also referred to as power container.
Wherein, the first connecting terminal 2021 of the first connecting terminal 2011 of upper bridge arm and lower bridge arm is used for and three-phase height
The exchange electrical connection in transmission system in a phase is pressed, with the ac circuit of networking same-phase.The upper bridge arm of power module
Second connecting terminal 2022 of the second connecting terminal 2012 and lower bridge arm, for being connect with direct current transportation busbar.
Control module 104 include valve control controller 1041, valve control controller 1041 respectively with it is upper in three power modules
Bridge arm 201 and lower bridge arm 202 connect, for driving the power cell in upper bridge arm 201 and lower bridge arm 202 to work, with execution pair
The electric energy conversion operation between three-phase alternating current and high voltage direct current in three-phase high-voltage transmission system.
Power container shown in Figure 2 both sides are additionally provided with insulating sleeve 203.Wherein, the first terminals of upper bridge arm
2011, the second terminals 2022 difference of the second terminals 2012 of upper bridge arm, the first terminals 2021 of lower bridge arm, lower bridge arm
By insulating sleeve, the loop of power circuit inside and outside power container is connected.
As described above, to realize that the modularization to MMC converter valves is built, the embodiment of the present invention is to each by concatenated power list
The power module that member is constituted has carried out encapsulation design so that each power module is rendered as body structure, and wall is pre- outside the enclosure
The connecting terminal of power cell is stayed.
So set, when needing to build new MMC converter valves, it is only necessary to good power container pre-packaged to three into
Row structure install, make these three power containers respectively in three-phase high-voltage transmission system three phases and and direct current transportation
Busbar connects, it will be able to realize the electric energy conversion between the three-phase alternating current and high voltage direct current in three-phase high-voltage transmission system
Operation.Therefore, the current converter in the embodiment of the present invention has the advantages that convenient transportation, easy for construction and construction period are short, easily
In promoting the use of.
Further, since power container uses encapsulating structure so that internal power cell will not be by external environment
Interference, therefore, it is possible to meet the outdoor application under the more severe occasion of environment.
Fig. 3 is the structural schematic diagram for the current converter that third embodiment of the invention provides.The difference of Fig. 3 and Fig. 1 exists
In the current converter in Fig. 3 further includes：Three reactor pylon 301- being correspondingly arranged with three power module 101-103
303。
Wherein, respectively with three-phase A, B, a phase in C high voltage power transmisson systems connects three reactor pylon 301-303
It connects, and is connected with AC terminal of corresponding power module.
Fig. 4 is the electrical layout figure for the reactor pylon that fourth embodiment of the invention provides.As shown in figure 4, each reactance
Device pylon includes two layers of reactor, and the reactor for being located at upper layer is lower bridge arm reactor 402, and the reactor for being located at lower layer is upper bridge
Arm reactor 401 is provided with interlayer support insulator 403, upper bridge between lower bridge arm reactor 402 and upper bridge arm reactor 401
Support insulator 404 over the ground are provided between arm reactor and ground.
Wherein, the first connecting terminal 4011 of upper bridge arm reactor connects with the first connecting terminal 2011 of corresponding upper bridge arm
It connects, the first connecting terminal 4021 of lower bridge arm reactor is connected with the first connecting terminal 2021 of corresponding lower bridge arm, upper bridge arm electricity
Second connecting terminal 4022 of the second connecting terminal 4012 of anti-device and corresponding lower bridge arm reactor, transmitting electricity with three-phase high-voltage is
Exchange electrical connection in system in a phase, with the ac circuit of networking corresponding phase.
The top of reactor pylon shown in Fig. 4 is additionally provided with tower lid 405, can protection reactor pylon not by rainwater
Etc. natural calamities infringement, improve reactor pylon functional reliability and the service life.
Fig. 5 is the structural schematic diagram for the current converter that fifth embodiment of the invention provides, and connection transformer is shown in Fig. 5
501。
In conjunction with Fig. 4, the second wiring of the second connecting terminal 4012 of upper bridge arm reactor and corresponding lower bridge arm reactor
Terminal 4022 is accessed by being coupled transformer 501 in the three-phase high-voltage transmission system.
In one embodiment, one or more hot-swappable fans can be installed on the side wall of power container
(not shown), control module 104 further include air-cooled controller 1042, and air-cooled controller 1042 is transported by controlling hot-swappable fans
It goes the heat that each layer power modules work generates in corresponding babinet is discharged.
In one embodiment, to improve the heat exchange efficiency of power modules, can be arranged on the side wall of power container
Corresponding air inlet.Further, for in terms of the optimization of air duct the considerations of, the location and shape of air inlet can be set
Meter, herein without limiting.
In one embodiment, water cooling pipeline (not shown) can be installed in power container, water cooling pipeline is
It is arranged close to each layer power modules, control module 104 further includes water dispenser controller 1043, and water dispenser controller 1043 is by controlling water
The operating status of cooling water in cold pipeline, to take away the heat that each layer power modules work generates in corresponding babinet.
It in one embodiment, can also be in the head cover of power container to improve the water-cooling efficiency of power modules
On be also equipped with one or more air cooling heat exchanger (not shown), water dispenser heat exchanger 1043 is by controlling air-cooled change
The heat that corresponding babinet inner water cooling pipe road is taken away is discharged in hot device operation.
In one embodiment, as shown in figure 5, to advanced optimize the modularized design of MMC converter valves, valve control controller
1041, air-cooled controller 1042 and water dispenser controller 1043 can be arranged with the independent another babinet of three power containers
It is interior.
Fig. 6 is the structural schematic diagram of bipolar commutation system that sixth embodiment of the invention provides, shown in Fig. 6 bipolar to change
Streaming system includes positive current converter 601, negative current converter 602 and control unit 603.
Wherein, positive current converter 601 can be current converter as Figure 1-Figure 5.Negative current converter 602 can be such as
Fig. 1-current converters shown in fig. 5.
The number of three power modules in positive current converter 601 shown in Fig. 6 is respectively 101,102 and 103.With it is upper
The number for stating the corresponding three reactor pylons of three power modules is respectively 301,302 and 303.By above three reactor tower
The number that bridge joint enters the valve coupling transformer of three-phase high-voltage transmission system (high-voltage fence) is 501.
The number of three power modules in positive current converter 601 shown in Fig. 6 is respectively 101,102 and 103.With it is upper
The number for stating the corresponding three reactor pylons of three power modules is respectively 301,302 and 303.By above three reactor tower
The number that bridge joint enters the valve coupling transformer of three-phase high-voltage transmission system (high-voltage fence) is 501.
The number of three power modules in positive current converter 602 shown in Fig. 6 is respectively 1011,1021 and 1031.
The number of three reactor pylons corresponding with above three power module is respectively 3011,3021 and 3031.By above three
The number that reactor pylon accesses the valve coupling transformer of three-phase high-voltage transmission system (high-voltage fence) is 5011.
For positive current converter 601, the second connecting terminal 2012 of bridge arm and positive direct-current transmission of electricity busbar DC+ on power module
Connection.Second connecting terminal 2022 of power module lower bridge arm is connect with ground connection direct current transportation busbar GND.
For bearing current converter 602, the second connecting terminal 2012 of bridge arm and ground connection direct current transportation busbar on power module
Second connecting terminal 2022 of GND connections, power module lower bridge arm connect DC- with negative direct current transportation busbar.
The control module of positive current converter 601 and negative current converter are integrated in control unit 603 shown in Fig. 6
602 control module, control unit can drive positive current converter 601 and/or bear according to the working condition of bipolar commutation system
Current converter 602 executes electric energy conversion operation.
In one embodiment, to advanced optimize the modularized design of bipolar MMC converter valves, control unit 603 can be with
Be arranged with the independent another babinet of power container in positive current converter 601 and negative current converter 602 in.
Fig. 7 is the circuit topology figure corresponding with the bipolar commutation system in Fig. 6 that seventh embodiment of the invention provides, this pair
Pole commutation system is applied in flexible transmission ＆ distribution electrical domain.
Wherein, the direct current anode connection positive direct-current transmission of electricity busbar DC+ of positive converter valve (positive current converter) 601, positive converter valve
601 direct current negative terminal connection ground connection direct current transportation busbar GND, the AC port of positive converter valve 601 pass through positive valve coupling transformer
501 connection three-phase high-voltage transmission systems.
Wherein, the direct current anode connection ground connection direct current transportation busbar GND of converter valve 602 is born；The direct current negative terminal of negative converter valve
Direct current transportation busbar DC- is born in connection, and the AC port for bearing converter valve is defeated by the negative connection of valve coupling transformer 5011 three-phase high-voltage
Electric system.
Wherein, positive converter valve 601 can be regarded as by three groups of power modules 101,102 and 103 and three groups of linked reactors
301,302 and 303 composition, negative converter valve 602 can be regarded as connects electricity by three groups of power modules 1011,1021 with 1031 with three groups
Anti- device 3011,3021 and 3031 forms.Every group of power module is made of multiple power cells (SM) cascade.
In embodiments of the present invention, two converter valves may be constructed bipolar DC system, and the power that more capacity may be implemented is defeated
Go out；When a converter valve, which breaks down, shuts down, another converter valve can work on, and realize that the power of half capacity is defeated
Go out, improves the stability operation of power grid.
Fig. 8 is the structural schematic diagram for the bipolar commutation system that eighth embodiment of the invention provides, for embodying bipolar MMC wind
Cooling system integrated configuration.
Fig. 8 is combined first below, and the package assembly of positive converter valve 601 is described in detail.
Three power containers of positive 601 side of converter valve are respectively：Positive valve A phase power container 101, positive valve B phase power
Container 102 and positive valve C phase power container 103.Referring to Fig.2, two AC terminal of power container, respectively on
First connecting terminal 2011 of bridge arm and the first connecting terminal 2021 of lower bridge arm are mounted on the side of power container, power
Two direct current connecting terminals of container, the second connecting terminal of the second connecting terminal 2012 and lower bridge arm of respectively upper bridge arm
2022, it is mounted on the other side of power container.
Three reactor pylons of positive 601 side of converter valve are respectively：Positive valve A phase reactors pylon 301, positive valve B phase reactance
Device pylon 302 and positive valve C phase reactors pylon 303.Refering to Fig. 4, reactor pylon is by upper bridge arm reactor 401 and lower bridge arm electricity
Anti- device 402 forms.
In conjunction with Fig. 2 and Fig. 4, the first connecting terminal 4011 of the upper bridge arm reactor of positive valve A phases reactor pylon, with positive valve
First connecting terminal 2011 of the upper bridge arm of A phase power containers connects；The lower bridge arm reactor of positive valve A phase reactor pylons
First connecting terminal 4021 is connect with the first connecting terminal 2021 of the lower bridge arm of positive valve A phases power container；Positive valve A phases electricity
Second connecting terminal 4012 of the upper bridge arm reactor of anti-device pylon, with the lower bridge arm reactor of positive valve A phases reactor pylon
Second connecting terminal 4022 links together, and the line terminals that connect with the valve side A of positive valve coupling transformer 501 connect.
In conjunction with Fig. 2 and Fig. 4, the first connecting terminal 4011 of the upper bridge arm reactor of positive valve B phases reactor pylon, with positive valve
First connecting terminal 2011 of the upper bridge arm of B phase power containers connects；The lower bridge arm reactor of positive valve B phase reactor pylons
First connecting terminal 4021 is connect with the first connecting terminal 2021 of the lower bridge arm of positive valve B phases power container；Positive valve B phases electricity
Second connecting terminal 4012 of the upper bridge arm reactor of anti-device pylon, with the lower bridge arm reactor of positive valve B phases reactor pylon
Second connecting terminal 4022 links together, and the line terminals that connect with the valve side B of positive valve coupling transformer 501 connect.
In conjunction with Fig. 2 and Fig. 4, the first connecting terminal 4011 of the upper bridge arm reactor of positive valve C phases reactor pylon, with positive valve
First connecting terminal 2011 of the upper bridge arm of C phase power containers connects；The lower bridge arm reactor of positive valve C phase reactor pylons
First connecting terminal 4021 is connect with the first connecting terminal 2021 of the lower bridge arm of positive valve C phases power container；Positive valve C phases electricity
Second connecting terminal 4012 of the upper bridge arm reactor of anti-device pylon, with the lower bridge arm reactor of positive valve C phases reactor pylon
Second connecting terminal 4022 links together, and the line terminals that connect with the valve side C of positive valve coupling transformer 501 connect.
In conjunction with Fig. 2, the second connecting terminal 2012 of the upper bridge arm of positive valve A phases power container, with direct current transportation busbar DC+
It connects；Second connecting terminal 2022 of the lower bridge arm of positive valve A phase power containers connects with ground connection direct current transportation busbar GND
It picks up and.
In conjunction with Fig. 2, the second connecting terminal 2012 of the upper bridge arm of positive valve B phases power container, with direct current transportation busbar DC+
It connects；Second connecting terminal 2022 of the lower bridge arm of positive valve B phase power containers connects with ground connection direct current transportation busbar GND
It picks up and.
In conjunction with Fig. 2, the second connecting terminal 2012 of the upper bridge arm of positive valve C phases power container, with direct current transportation busbar DC+
It connects；Second connecting terminal of the lower bridge arm of positive valve C phase power containers has been connect with ground connection direct current transportation busbar GND
Come.
Next, the package assembly for bearing converter valve 602 is described in detail in conjunction with Fig. 8.
Three power containers of negative 602 side of converter valve are respectively：Negative valve A phase power container 1011, negative valve B phase power
Container 1021, negative valve C phase power container 1031.
Three reactor pylons of negative 602 side of converter valve are respectively：Negative valve A phase reactors pylon 3011, negative valve B phase reactance
Device pylon 3021, negative valve C phase reactors pylon 3031.
In conjunction with Fig. 2 and Fig. 4, the first connecting terminal 4011 of the upper bridge arm reactor of valve A phase reactor pylons is born, and it is negative
First connecting terminal 2011 of the upper bridge arm of valve A phase power containers connects；The lower bridge arm reactor of negative valve A phase reactor pylons
The first connecting terminal 4021, connect with the first connecting terminal 2021 of the lower bridge arm of negative valve A phases power container；Negative valve A phases
Second connecting terminal 4012 of the upper bridge arm reactor of reactor pylon, the lower bridge arm reactor with negative valve A phases reactor pylon
The second connecting terminal 4022 link together, the line terminals that connect with the valve side A of negative valve coupling transformer 5011 connect.
In conjunction with Fig. 2 and Fig. 4, the first connecting terminal 4011 of the upper bridge arm reactor of valve B phase reactor pylons is born, with negative valve
First connecting terminal 2011 of the upper bridge arm of B phase power containers connects；The lower bridge arm reactor of negative valve B phase reactor pylons
First connecting terminal 4021 is connect with the first connecting terminal 2021 of the lower bridge arm of negative valve B phases power container；Negative valve B phases electricity
Second connecting terminal 4012 of the upper bridge arm reactor of anti-device pylon, with the lower bridge arm reactor of negative valve B phases reactor pylon
Second connecting terminal 4022 links together, and the line terminals that connect with the valve side B of negative valve coupling transformer 5011 connect.
In conjunction with Fig. 2 and Fig. 4, the first connecting terminal 4011 of the upper bridge arm reactor of valve C phase reactor pylons is born, with negative valve
First connecting terminal 2011 of the upper bridge arm of C phase power containers connects；The lower bridge arm reactor of negative valve C phase reactor pylons
First connecting terminal 4021 is connect with the first connecting terminal 2021 of the lower bridge arm of negative valve C phases power container；Negative valve C phases electricity
Second connecting terminal 4012 of the upper bridge arm reactor of anti-device pylon, with the lower bridge arm reactor of negative valve C phases reactor pylon
Second connecting terminal 4022 links together, and the line terminals that connect with the valve side C of negative valve coupling transformer 5011 connect.
In conjunction with Fig. 2, the second connecting terminal 2012 of the upper bridge arm of valve A phase power containers is born, it is female with ground connection direct current transportation
Line GND is connected；Second connecting terminal 2022 of the lower bridge arm of negative valve A phase power containers, connects with direct current transportation busbar DC-
It picks up and.
In conjunction with Fig. 2, the second connecting terminal 2012 of the upper bridge arm of valve B phase power containers is born, it is female with ground connection direct current transportation
Line GND is connected；Second connecting terminal 2022 of the lower bridge arm of negative valve B phase power containers, connects with direct current transportation busbar DC-
It picks up and.
In conjunction with Fig. 2, the second connecting terminal 2012 of the upper bridge arm of valve C phase power containers is born, it is female with ground connection direct current transportation
Line GND is connected；Second connecting terminal 2022 of the lower bridge arm of negative valve C phase power containers, connects with direct current transportation busbar DC-
It picks up and.
In one embodiment, the valve side of positive valve coupling transformer is the triangle mode of connection, is prevented due to modulation generation
Zero sequence flows to power grid, and net side is star-shaped connection type, is connected with high-voltage fence.
Valve control container 603 is also shown in Fig. 8, and valve control equipment (valve control controller is provided in the valve control container
1041), for control positive valve A phase power container 101, positive valve B phase power container 102, positive valve C phase power container 103,
Power list in negative valve A phase power container 1011, negative valve B phase power container 1021 and negative valve C phase power container 1031
Member work.
In one embodiment, valve control container 603 is connected with above-mentioned power container by optical fiber, is controlled
The interaction of signal and acquisition signal.
In embodiments of the present invention, when the air-cooled integrated configuration for carrying out MMC systems using the bipolar commutation system in Fig. 8
When, one or more hot-swappable fans (not shown), valve control can be installed on the side wall of each power container
Container 603 is additionally provided with fan control apparatus, and (corresponding case is discharged for controlling hot-swappable fans operation in air-cooled controller 1042
The heat that the work of each layer power modules generates in vivo.
Fig. 9 is the structural schematic diagram for the bipolar commutation system that ninth embodiment of the invention provides, for embodying bipolar MMC water
Cooling system integrated configuration.
Fig. 9 the difference from Fig. 8 is that, when carry out MMC systems water cooling integrated configuration constantly, can be in power collection
Water cooling pipeline is installed in vanning, water cooling pipeline close to each layer power modules be arranged and valve control container 603 in water cooling is set
Control device (water dispenser controller 1043), the operating status for controlling cooling water in water cooling pipeline, to take away in corresponding babinet
The heat that each layer power modules work generates.
It further, can be on the top of power container as shown in figure 9, to improve the water-cooling efficiency of power modules
It covers and is also equipped with one or more air cooling heat exchanger 901, water-cooling system and air cooling heat exchanger 9 have been combined together
The circulation cooling of success rate packaging the temperature inside the box.
It should be clear that each embodiment in this specification is described in a progressive manner, each embodiment it
Between just to refer each other for same or analogous part, the highlights of each of the examples are it is different from other embodiment it
Place.For device embodiments, related place may refer to the declaratives of embodiment of the method.Not office of the embodiment of the present invention
It is limited to particular step and structure described above and shown in figure.Those skilled in the art can understand the present invention in fact
It after the spirit for applying example, is variously modified, modification and addition, or the sequence between changing the step.Also, it is risen in order to concise
See, omits the detailed description to known method technology here.
The embodiment of the present invention can be realized in other specific forms, without departing from its spirit and essential characteristics.For example, special
Determine the algorithm described in embodiment to be changed, and system architecture is without departing from the substantially smart of the embodiment of the present invention
God.Therefore, current embodiment is all counted as being exemplary rather than limited, the model of the embodiment of the present invention in all respects
It encloses and is defined by appended claims rather than foregoing description, also, fall into the meaning of claim and complete in the range of equivalent
Portion changes all to be included among the range of the embodiment of the present invention.
Claims (10)
1. a kind of current converter, which is characterized in that including control module and three power modules；
The power module includes babinet and two layers of power modules being installed in the babinet, and each layer power modules are by grade
Multiple power cells of connection setting are constituted, and the power modules for being located at upper layer are lower bridge arm, and the power modules for being located at lower layer are upper bridge
Arm；
First connecting terminal of the upper bridge arm and the first connecting terminal of the lower bridge arm are used for and three-phase high-voltage transmission system
In exchange electrical connection in a phase, with the ac circuit of networking same-phase；Second connecting terminal of the upper bridge arm and institute
The second connecting terminal for stating lower bridge arm, connect with direct current transportation busbar；
The control module includes valve control controller, the valve control controller respectively on described in three power modules
Bridge arm is connected with the lower bridge arm, for driving the power cell in the upper bridge arm and the lower bridge arm to work, with execution pair
The electric energy conversion operation between three-phase alternating current and the high voltage direct current in the three-phase high-voltage transmission system.
2. current converter according to claim 1, which is characterized in that the current converter further includes：With three work(
Three reactor pylons that rate module is correspondingly arranged；Wherein,
Each reactor pylon includes two layers of reactor, and the reactor for being located at upper layer is lower bridge arm reactor, is located at the electricity of lower layer
Anti- device is upper bridge arm reactor, and interlayer post insulator is provided between the lower bridge arm reactor and the upper bridge arm reactor
Son is provided with support insulator over the ground between the upper bridge arm reactor and ground；
First connecting terminal of the upper bridge arm reactor is connected with the first connecting terminal of the corresponding upper bridge arm, the lower bridge
First connecting terminal of arm reactor is connected with the first connecting terminal of the corresponding lower bridge arm；The of the upper bridge arm reactor
Second connecting terminal of two connecting terminals and the corresponding lower bridge arm reactor, for in the three-phase high-voltage transmission system
Exchange electrical connection in one phase, with the ac circuit of networking same-phase.
3. current converter according to claim 2, which is characterized in that the second connecting terminal of the upper bridge arm reactor with
And the second connecting terminal of corresponding lower bridge arm reactor is used to connect described three with transformer connection, the connection transformer is coupled
Phase high voltage power transmisson system.
4. current converter according to claim 2, which is characterized in that the top of the reactor pylon is provided with tower lid.
5. current converter according to claim 1, which is characterized in that be equipped with one or two on the side wall of the babinet
Above hot-swappable fans；
The control module further includes air-cooled controller, and the air-cooled controller is connect with the hot-swappable fans.
6. current converter according to claim 1, which is characterized in that be equipped in the babinet for cooling power module
Water cooling pipeline；
The control module further includes water dispenser controller, the operating status for controlling cooling water in the water cooling pipeline.
7. current converter according to claim 6, which is characterized in that be also equipped with one or two on the head cover of the babinet
A above air cooling heat exchanger, the water dispenser controller are also connect with the air cooling heat exchanger.
8. according to the current converter described in claim 1-7 any one, which is characterized in that control module setting with institute
It states in three independent another babinets of the affiliated babinet of power module.
9. a kind of bipolar commutation system, which is characterized in that including：Two current converters and control unit；The current converter packet
It includes：
Current converter as described in claim 1-8 any one, the upper bridge of the power module of one of them current converter
Second connecting terminal of arm is connect with positive direct-current transmission of electricity busbar, and the second of the lower bridge arm of the power module of a current converter
Connecting terminal is connect with ground connection direct current transportation busbar；
Second connecting terminal of the upper bridge arm of the power module of another current converter is connect with ground connection direct current transportation busbar,
Second connecting terminal of the lower bridge arm of the power module of another current converter is connect with negative direct current transportation busbar；
Described control unit connects two current converters, and described control unit is according to the work shape of the bipolar commutation system
State drives one or two execution electric energy conversion operations in two current converters.
10. bipolar commutation system according to claim 9, which is characterized in that described control unit setting with the work(
In the independent another babinet of the affiliated babinet of rate module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810420438.3A CN108512440A (en) | 2018-05-04 | 2018-05-04 | Current conversion device and bipolar current conversion system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810420438.3A CN108512440A (en) | 2018-05-04 | 2018-05-04 | Current conversion device and bipolar current conversion system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108512440A true CN108512440A (en) | 2018-09-07 |
Family
ID=63399954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810420438.3A Pending CN108512440A (en) | 2018-05-04 | 2018-05-04 | Current conversion device and bipolar current conversion system |
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| Country | Link |
|---|---|
| CN (1) | CN108512440A (en) |
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| CN113054856A (en) * | 2019-12-27 | 2021-06-29 | 新疆金风科技股份有限公司 | Converter valve tower, converter system and wind generating set |
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