CN208424219U - Current converter and bipolar commutation system - Google Patents
Current converter and bipolar commutation system Download PDFInfo
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- CN208424219U CN208424219U CN201820667789.XU CN201820667789U CN208424219U CN 208424219 U CN208424219 U CN 208424219U CN 201820667789 U CN201820667789 U CN 201820667789U CN 208424219 U CN208424219 U CN 208424219U
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Abstract
The utility model discloses a kind of current converter and bipolar commutation system.The current converter includes control module and three power modules, and power module includes cabinet and is installed on intracorporal two layers of the power modules of case；First connecting terminal of upper bridge arm and the first connecting terminal of lower bridge arm, 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；Second connecting terminal of upper bridge arm and the second connecting terminal of lower bridge arm are connect with direct current transportation bus；Control module includes valve control controller, valve control controller respectively in three power modules upper bridge arm and lower bridge arm connect, for driving the power cell in upper bridge arm and lower bridge arm to work, to execute to the electric energy conversion operation between the three-phase alternating current and high voltage direct current in three-phase high-voltage transmission system.Using the technical scheme in the embodiment of the utility model, the modularization construction to MMC converter valve can be realized.
Description
Technical field
The utility model relates to power transmission technology field more particularly to a kind of current converter and bipolar commutation systems.
Background technique
The function of converter valve is to execute conversion operation to electric current, for example, converting alternating current 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 be by being superimposed the very high voltage of output for the cascade mode of multiple submodule.MMC converter valve has defeated
The features such as harmonic wave is few out, 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 valve 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 valve.
Summary of the invention
The utility model embodiment provides a kind of current converter and bipolar commutation system, can be realized to MMC converter valve
Modularization build, have the characteristics that low construction requirement, low cost and short construction period, the popularization for being conducive to MMC converter valve is answered
With.
In a first aspect, the utility model embodiment provides a kind of current converter, which includes control module and three
A power module:
Power module includes cabinet and is installed on intracorporal two layers of the power modules of case, and each layer power modules are set by cascade
The multiple power cells set are constituted, and the power modules positioned at upper layer are lower bridge arm, and the power modules positioned at lower layer are upper bridge arm；
First connecting terminal of upper bridge arm and the first connecting terminal of lower bridge arm are used for and in three-phase high-voltage transmission system one
Exchange electrical connection in a phase, with the ac circuit of networking same-phase；The of second connecting terminal of upper bridge arm and lower bridge arm
Two connecting terminals are connect with direct current transportation bus；
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 include: corresponding with three power modules to set
The three reactor pylons set；Wherein, each reactor pylon includes two layers of reactor, and the reactor positioned at upper layer is lower bridge arm
Reactor, the reactor positioned at lower layer is upper bridge arm reactor, is provided with layer 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
First connecting terminal of line terminals and corresponding upper bridge arm connects, the first connecting terminal of lower bridge arm reactor and corresponding lower bridge arm
The connection of first connecting terminal；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 cabinet
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 mould group is installed in cabinet
Road, control module further includes water dispenser controller, for controlling the operating status of cooling water in water cooling pipeline.
In a kind of possible embodiment of first aspect, one or more is also equipped on the top cover of cabinet
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 cabinets of power module
In independent another cabinet.
Second aspect, the utility model embodiment provide a kind of bipolar commutation system, which includes: two
Current converter 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 bus 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 bus；
The second connecting terminal and ground connection direct current of the upper bridge arm of the power module of the negative current converter of another current converter
Transmit electricity bus connection, the second connecting terminal of the lower bridge arm of the power module of another current converter and negative direct current transportation bus company
It connects；
Two current converters, working condition of the control unit according to bipolar commutation system, driving two are connected in control unit
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 cabinet of power module
Another cabinet in.
As described above, the utility model embodiment is to each by cascade function to realize that the modularization to MMC converter valve is built
The power module that rate unit is constituted has carried out encapsulation design, so that each power module is rendered as body structure, and outside the enclosure
Wall has reserved the connecting terminal of power cell.
So set, when needing to build new MMC converter valve, it is only necessary to three pre-packaged good power containers into
Row installation, make these three power containers respectively in three-phase high-voltage transmission system three phases and with direct current transportation bus
Connection, it will be able to realize and behaviour is converted to the electric energy 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 utility model embodiment has the advantages that convenient transportation, easy for construction and construction period are short,
Use easy to spread.
Detailed description of the invention
It may be better understood from the description with reference to the accompanying drawing to specific embodiment of the present utility model practical
It is novel wherein, the same or similar appended drawing reference indicates the same or similar feature.
Fig. 1 is a kind of structural schematic diagram for current converter that the utility model first embodiment provides；
Fig. 2 is the electrical layout figure for the power module that the utility model second embodiment provides；
Fig. 3 is the structural schematic diagram for the current converter that the utility model 3rd embodiment provides；
Fig. 4 is the electrical layout figure for the reactor pylon that the utility model fourth embodiment provides；
Fig. 5 is the structural schematic diagram for the current converter that the 5th embodiment of the utility model provides；
Fig. 6 is the structural schematic diagram for the bipolar commutation system that the utility model sixth embodiment provides；
Fig. 7 is the circuit topology figure corresponding with the bipolar commutation system in Fig. 6 that the 7th embodiment of the utility model provides；
Fig. 8 is the structural schematic diagram for the bipolar commutation system that the 8th embodiment of the utility model provides；
Fig. 9 is the structural schematic diagram for the bipolar commutation system that the 9th embodiment of the utility model provides.
Description of symbols:
101,102,103,1011,1021,1031 be power module；104- control module；
1041- valve control controller；1042- air-cooled controller；1043- water dispenser controller；
The upper bridge arm of 201-；202- lower bridge arm；203- porcelain bushing；
First connecting terminal of the upper bridge arm of 2011-；Second connecting terminal of the upper bridge arm of 2012-；
First connecting terminal of 2021- lower bridge arm；Second connecting terminal of 2022- lower bridge arm；
301,302,303,3011,3021,3031 be reactor pylon；
The upper bridge arm reactor of 401-；402- lower bridge arm reactor；
First connecting terminal of the upper bridge arm reactor of 4011-；
Second connecting terminal of the upper bridge arm reactor of 4012-；
First connecting terminal of 4021- lower bridge arm reactor；
Second connecting terminal of 4022- lower bridge arm reactor；
403- layer insulation pillar；404- insulation against ground pillar；405- top cover；
501- is coupled one of transformer (positive valve coupling transformer)；
Two (negative valve coupling transformers) of 5011- connection transformer；
The positive current converter of 601- (positive converter valve)；The negative current converter of 602- (negative converter valve)；
603- control unit；901- hot-swappable fans.
Specific embodiment
The feature and exemplary embodiment of the various aspects of the utility model is described more fully below.It is retouched in detail in following
In stating, many details are proposed, in order to provide the comprehensive understanding to the utility model.
The utility model embodiment provides a kind of current converter and bipolar commutation system, can be realized to MMC converter valve
Modularization 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 valve.
For example, being suitable for the particular applications such as desert power station, the construction of these application valve halls is difficult, construction period required time
It is short, it is badly in need of MMC converter valve open air type and integrated solution.
Fig. 1 is a kind of structural schematic diagram for current converter that the utility model first embodiment provides.As shown in Figure 1, should
Current converter includes three power module 101-103 and control module 104.
Wherein, three power module 101-103 are respectively with three-phase A, B, phase connection in C high voltage power transmisson system.
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 bus.
Fig. 2 is the electrical layout figure for the power module that the utility model second embodiment provides.As shown in Fig. 2, Mei Gegong
Rate module includes cabinet and is installed on intracorporal two layers of the power modules of case.Multiple function that each layer power modules are arranged by cascade
Rate unit is constituted, and forms MMC structure, and the power modules positioned at upper layer are lower bridge arm 202, and the power modules positioned at lower layer are upper bridge
Arm 201.Wherein, power cell can be half-bridge structure, or full bridge structure, herein without limitation.
In the utility model embodiment, the power module of cabinet 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 bus.
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 two sides are additionally provided with insulating sleeve 203.Wherein, the first terminals of upper bridge arm
2011, the second terminals 2012 of upper bridge arm, the first terminals 2021 of lower bridge arm, lower bridge arm the second terminals 2022 divide
Not Tong Guo insulating sleeve, the loop of power circuit inside and outside power container is connected.
As described above, the utility model embodiment is to each by cascade function to realize that the modularization to MMC converter valve is built
The power module that rate unit is constituted has carried out encapsulation design, so that each power module is rendered as body structure, and outside the enclosure
Wall has reserved the connecting terminal of power cell.
So set, when needing to build new MMC converter valve, it is only necessary to three pre-packaged good power containers into
Row structure installation, make these three power containers respectively with three phases and and direct current transportation in three-phase high-voltage transmission system
Bus connection, it will be able to realize and the electric energy between the three-phase alternating current and high voltage direct current in three-phase high-voltage transmission system is converted
Operation.Therefore, the current converter in the utility model embodiment has convenient transportation, easy for construction and short construction period excellent
Point, use easy to spread.
Further, since power container uses encapsulating structure, so that internal power cell not will receive external environment
Interference therefore can satisfy the outdoor application under the more severe occasion of environment.
Fig. 3 is the structural schematic diagram for the current converter that the utility model 3rd embodiment provides.Fig. 3 it is different from Fig. 1's it
It is in current converter in Fig. 3 further include: three reactor pylons being correspondingly arranged with three power module 101- 103
301-303。
Wherein, respectively with three-phase A, B, a phase in C high voltage power transmisson system 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 the utility model fourth embodiment provides.As shown in figure 4, each
Reactor pylon includes two layers of reactor, and the reactor positioned at upper layer is lower bridge arm reactor 402, and the reactor positioned at lower layer is
Upper bridge arm reactor 401 is provided with interlayer support insulator 403 between lower bridge arm reactor 402 and upper bridge arm reactor 401,
Support insulator 404 over the ground are provided between upper bridge 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 the 5th embodiment of the utility model provides, and connection is shown in Fig. 5 and is become
Depressor 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 in the three-phase high-voltage transmission system by being coupled transformer 501.
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 passes through control hot-swappable fans fortune
It goes the heat that each layer power modules work generates in corresponding cabinet is discharged.
In one embodiment, it is the heat exchange efficiency for improving power modules, can be arranged on the side wall of power container
Corresponding air inlet.Further, for the considerations of optimizing aspect to air duct, 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 passes through control water
The operating status of cooling water in cold pipeline, to take away the heat that each layer power modules work generates in corresponding cabinet.
It in one embodiment, is the water-cooling efficiency for improving power modules, it can also be in the top cover of power container
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 cabinet 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 valve, valve control controller
1041, air-cooled controller 1042 and water dispenser controller 1043 can be set with the independent another cabinet of three power containers
It is interior.
Fig. 6 is the structural schematic diagram for the bipolar commutation system that the utility model sixth embodiment provides, shown in Fig. 6
Bipolar commutation 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 for such as
Fig. 1-current converter 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
The number of the corresponding three reactor pylons of above three power module is respectively 301,302 and 303.By above three reactance
The number that device pylon accesses 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
The number of the corresponding three reactor pylons of above three power module is respectively 301,302 and 303.By above three reactance
The number that device pylon accesses 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 are transmitted electricity bus DC+ on power module
Connection.Second connecting terminal 2022 of power module lower bridge arm is connect with ground connection direct current transportation bus GND.
For negative current converter 602, the second connecting terminal 2012 of bridge arm and ground connection direct current transportation bus on power module
Second connecting terminal 2022 of GND connection, power module lower bridge arm connect DC- with negative direct current transportation bus.
Be integrated in control unit 603 shown in Fig. 6 positive current converter 601 control module and negative current converter
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.
It in one embodiment, is the modularized design for advanced optimizing bipolar MMC converter valve, control unit 603 can be with
Be arranged in in the independent another cabinet of power container in positive current converter 601 and negative current converter 602.
Fig. 7 is the circuit topology figure corresponding with the bipolar commutation system in Fig. 6 that the 7th embodiment of the utility model provides,
The bipolar commutation system is applied in flexible transmission & distribution electrical domain.
Wherein, the direct current anode connection positive direct-current transmission of electricity bus DC+ of positive converter valve (positive current converter) 601, positive converter valve
601 direct current negative terminal connection ground connection direct current transportation bus 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 bus GND of negative converter valve 602；The direct current negative terminal of negative converter valve
Negative direct current transportation bus DC- is connected, the AC port of negative converter valve is defeated by negative valve coupling transformer 5011 connection 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, which can be regarded as, to be connected by three groups of power modules 1011,1021 with 1031 with three groups
Reactor 3011,3021 and 3031 forms.Every group of power module is made of multiple power cells (SM) cascade.
In the utility model embodiment, two converter valves may be constructed bipolar DC system, and the function of larger capacity may be implemented
Rate output；When a converter valve, which breaks down, shuts down, another converter valve can work on, and realize the power of half capacity
Output improves the stability operation of power grid.
Fig. 8 is the structural schematic diagram for the bipolar commutation system that the 8th embodiment of the utility model provides, bipolar for embodying
MMC air 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 as follows: 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 2012 of respectively upper bridge arm and the second connecting terminal of lower 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 as follows: positive valve A phase reactor pylon 301, positive valve B phase reactance
Device pylon 302 and positive valve C phase reactor 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 phase reactor pylon, with positive valve
First connecting terminal 2011 of the upper bridge arm of A phase power container connects；The lower bridge arm reactor of positive valve A phase reactor pylon
First connecting terminal 4021 is connect with the first connecting terminal 2021 of the lower bridge arm of positive valve A phase power container；Positive valve A phase 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 phase 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 phase reactor pylon, with positive valve
First connecting terminal 2011 of the upper bridge arm of B phase power container connects；The lower bridge arm reactor of positive valve B phase reactor pylon
First connecting terminal 4021 is connect with the first connecting terminal 2021 of the lower bridge arm of positive valve B phase power container；Positive valve B phase 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 phase 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 phase reactor pylon, with positive valve
First connecting terminal 2011 of the upper bridge arm of C phase power container connects；The lower bridge arm reactor of positive valve C phase reactor pylon
First connecting terminal 4021 is connect with the first connecting terminal 2021 of the lower bridge arm of positive valve C phase power container；Positive valve C phase 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 phase 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 phase power container, with direct current transportation bus DC+
It connects；Second connecting terminal 2022 of the lower bridge arm of positive valve A phase power container connects with ground connection direct current transportation bus GND
It picks up and.
In conjunction with Fig. 2, the second connecting terminal 2012 of the upper bridge arm of positive valve B phase power container, with direct current transportation bus DC+
It connects；Second connecting terminal 2022 of the lower bridge arm of positive valve B phase power container connects with ground connection direct current transportation bus GND
It picks up and.
In conjunction with Fig. 2, the second connecting terminal 2012 of the upper bridge arm of positive valve C phase power container, with direct current transportation bus DC+
It connects；Second connecting terminal of the lower bridge arm of positive valve C phase power container has been connect with ground connection direct current transportation bus GND
Come.
Next, being described in detail in conjunction with package assembly of the Fig. 8 to negative converter valve 602.
Three power containers of negative 602 side of converter valve are respectively as follows: negative valve A phase power container 1011, negative valve B phase function
Rate container 1021, negative valve C phase power container 1031.
Three reactor pylons of negative 602 side of converter valve are respectively as follows: negative valve A phase reactor pylon 3011, negative valve B phase electricity
Anti- device pylon 3021, negative valve C phase reactor pylon 3031.
In conjunction with Fig. 2 and Fig. 4, the first connecting terminal 4011 of the upper bridge arm reactor of negative valve A phase reactor pylon, with negative valve
First connecting terminal 2011 of the upper bridge arm of A phase power container connects；The lower bridge arm reactor of negative valve A phase reactor pylon
First connecting terminal 4021 is connect with the first connecting terminal 2021 of the lower bridge arm of negative valve A phase power container；Negative valve A phase electricity
Second connecting terminal 4012 of the upper bridge arm reactor of anti-device pylon, with the lower bridge arm reactor of negative valve A phase reactor pylon
Second connecting terminal 4022 links together, and 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 negative valve B phase reactor pylon, with negative valve
First connecting terminal 2011 of the upper bridge arm of B phase power container connects；The lower bridge arm reactor of negative valve B phase reactor pylon
First connecting terminal 4021 is connect with the first connecting terminal 2021 of the lower bridge arm of negative valve B phase power container；Negative valve B phase 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 phase 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 negative valve C phase reactor pylon, with negative valve
First connecting terminal 2011 of the upper bridge arm of C phase power container connects；The lower bridge arm reactor of negative valve C phase reactor pylon
First connecting terminal 4021 is connect with the first connecting terminal 2021 of the lower bridge arm of negative valve C phase power container；Negative valve C phase 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 phase 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 negative valve A phase power container 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 container connects with direct current transportation bus DC-
It picks up and.
In conjunction with Fig. 2, the second connecting terminal 2012 of the upper bridge arm of negative valve B phase power container 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 container connects with direct current transportation bus DC-
It picks up and.
In conjunction with Fig. 2, the second connecting terminal 2012 of the upper bridge arm of negative valve C phase power container 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 container connects with direct current transportation bus 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, connects 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 the utility model embodiment, when the air-cooled integration for carrying out MMC system using the bipolar commutation system in Fig. 8
When layout, one or more hot-swappable fans (not shown) can be installed on the side wall of each power container,
Valve control container 603 is additionally provided with fan control apparatus (air-cooled controller 1042, for controlling hot-swappable fans operation, discharge pair
Answer the heat that each layer power modules work generates in cabinet.
Fig. 9 is the structural schematic diagram for the bipolar commutation system that the 9th embodiment of the utility model provides, bipolar for embodying
MMC water-cooling system integrated configuration.
Fig. 9 the difference from Fig. 8 is that, when carry out MMC system 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
It controls equipment (water dispenser controller 1043), for controlling the operating status of cooling water in water cooling pipeline, to take away in corresponding cabinet
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
The air cooling heat exchanger 901 for being also equipped with one or more is covered, 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 all the embodiments in this specification are described in a progressive manner, each embodiment it
Between the same or similar part may refer to each other, the highlights of each of the examples are it is different from other embodiments it
Place.For device embodiment, related place may refer to the declaratives of embodiment of the method.The utility model embodiment is simultaneously
It is not limited to particular step and structure described above and shown in figure.Those skilled in the art can understand this reality
It after the spirit of new embodiment, is variously modified, modification and addition, or the sequence between changing the step.Also, it is
For the sake of concise, the detailed description to known method technology is omitted here.
The utility model embodiment can be realized in other specific forms, without departing from its spirit and essential characteristics.Example
Such as, algorithm described in specific embodiment can be modified, and system architecture is without departing from the utility model embodiment
Essence spirit.Therefore, current embodiment is all counted as being exemplary rather than in all respects limited, this is practical new
The range of type embodiment is by appended claims rather than foregoing description defines, also, falls into the meaning and equivalent of claim
In the range of whole change all to be included among the range of the utility model embodiment.
Claims (10)
1. a kind of current converter, which is characterized in that including control module and three power modules；
The power module includes cabinet and is installed on intracorporal two layers of the power modules of the case, and each layer power modules are by grade
Multiple power cells of connection setting are constituted, and the power modules positioned at upper layer are lower bridge arm, and the power modules positioned 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 bus；
The control module includes valve control controller, and the valve control controller is respectively and 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 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 include: with three function
Three reactor pylons that rate module is correspondingly arranged；Wherein,
Each reactor pylon includes two layers of reactor, and the reactor positioned at upper layer is lower bridge arm reactor, positioned at the electricity of lower layer
Anti- device is upper bridge arm reactor, is provided with interlayer post insulator 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 cabinet
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 cabinet for cooling power mould group
Water cooling pipeline；
The control module further includes water dispenser controller, for controlling the operating status of 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 top cover of the cabinet
A above air cooling heat exchanger, the water dispenser controller are also connect with the air cooling heat exchanger.
8. current converter described in -7 any one according to claim 1, which is characterized in that control module setting with institute
It states in three independent another cabinets of the affiliated cabinet of power module.
9. a kind of bipolar commutation system characterized by comprising 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 bus, 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 bus；
Second connecting terminal of the upper bridge arm of the power module of another current converter is connect with ground connection direct current transportation bus,
Second connecting terminal of the lower bridge arm of the power module of another current converter is connect with negative direct current transportation bus；
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 function
In the independent another cabinet of the affiliated cabinet of rate module.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820667789.XU CN208424219U (en) | 2018-05-04 | 2018-05-04 | Current converter and bipolar commutation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820667789.XU CN208424219U (en) | 2018-05-04 | 2018-05-04 | Current converter and bipolar commutation system |
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| CN208424219U true CN208424219U (en) | 2019-01-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108512440A (en) * | 2018-05-04 | 2018-09-07 | 北京金风科创风电设备有限公司 | Current conversion device and bipolar current conversion system |
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2018
- 2018-05-04 CN CN201820667789.XU patent/CN208424219U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108512440A (en) * | 2018-05-04 | 2018-09-07 | 北京金风科创风电设备有限公司 | Current conversion device and bipolar current conversion system |
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