CN205377313U - Switch bypass circuit, converter and direct current network deployment conversion system - Google Patents

Switch bypass circuit, converter and direct current network deployment conversion system Download PDF

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Publication number
CN205377313U
CN205377313U CN201620097622.5U CN201620097622U CN205377313U CN 205377313 U CN205377313 U CN 205377313U CN 201620097622 U CN201620097622 U CN 201620097622U CN 205377313 U CN205377313 U CN 205377313U
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China
Prior art keywords
power supply
load
switch
converter
control
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Active
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CN201620097622.5U
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Chinese (zh)
Inventor
敬双
尹进峰
杨志千
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Beijing Etechwin Electric Co Ltd
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Beijing Etechwin Electric Co Ltd
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Abstract

The utility model provides a switch bypass circuit, converter and direct current network deployment conversion system. It includes to switch the bypass circuit: the switch of setting on a power supply branch road and a load way to reach the the control unit who is connected with each switch, the branch road of being connected between the circular telegram power that the power supply branch road is the converter system and the load of converter system, load branch road are the branch road between the load of dc bus and the converter system of converter system, and the control unit is used for controlling each switch conduction or disconnection. Adopt the utility model discloses an embodiment can switch over suitable power supply for the load, and then effective proof load obtains reliable and stable power supply.

Description

Switching bypass circuit, current transformer and direct current networking converter system
Technical field
This utility model relates to micro-capacitance sensor technical field, switches bypass circuit, current transformer and direct current networking converter system particularly to one.
Background technology
Micro-capacitance sensor is small-sized the distribution system collected by distributed power source, energy storage device, energy conversion device, related load and protection device, it is possible to have external electrical network to be incorporated into the power networks, it is also possible to independent operating.The advantages such as micro-capacitance sensor has the power supply reliability that can improve important load, meets the personalized electricity needs of user, conveniently carries out intelligent management, of reduced contamination, less costly.Therefore, micro-capacitance sensor is to realize tradition electrical network to the basis of intelligent grid.
The combination in any such as photovoltaic generator, wind-driven generator, biomass power generation, fuel generator, accumulator can be got up by micro-capacitance sensor, by dc bus or ac bus, and the metering such as current transformer and to control device be that load is powered.Owing to the development time of micro-capacitance sensor technology is shorter; corresponding control and resist technology are ripe not enough; in the running of micro-capacitance sensor, its internal part there will be fault; cause that micro-capacitance sensor output of powering is broken down; make load can not obtain reliable and stable power supply; the electricity needs of user can not be met, even user is caused serious economic loss.
Utility model content
Embodiment of the present utility model provides one switching bypass circuit, current transformer and direct current networking converter system, is effectively ensured load and obtains reliable and stable power supply.
For reaching above-mentioned purpose, embodiment of the present utility model provides a kind of switching bypass circuit, including: it is arranged on the switch on power supply branch road and load branch and the control unit being connected with each described switch;Described power supply branch road is the branch road being connected between the power supply of converter system and the load of described converter system, and described load branch is the branch road being connected between the dc bus of converter system and the load of described converter system;Described control unit is used for controlling each switch conduction or disconnection.
Further, described control unit includes first controlling brancher identical with described power supply branch road quantity, and described first controlling brancher is provided with the first control portion;The switch of described power supply branch road includes the first switch portion, described first switch portion described first control portion obtain electric after Guan Bi, after dead electricity disconnect.
Further, described control unit also includes second controlling brancher identical with described load branch quantity, and described second controlling brancher is provided with the second control portion;The switch of described load branch includes second switch portion, described second switch portion described second control portion obtain electric after Guan Bi, after dead electricity disconnect.
Further, each described first controlling brancher is additionally provided with additionally multiple first switch portion that the first control portion correspondence of other described first controlling brancher controls and the another one second switch portion that described second control portion correspondence controls;Each described second controlling brancher is additionally provided with additionally multiple first switch portion that each described first control portion correspondence controls;Described additionally multiple first switch portion described first control portion obtain electric after disconnect, after dead electricity close;Described another one second switch portion described second control portion obtain electric after disconnect, after dead electricity close.
Further, being additionally provided with switching device on each described first controlling brancher and each described second controlling brancher, described switching device is connected with described control unit.
According to another aspect of the present utility model, embodiment of the present utility model also provides for a kind of current transformer, and described current transformer includes: the load branch that dc bus, multiple power supply branch road are connected with described dc bus, and switches bypass circuit foregoing.
According to another aspect of the present utility model, embodiment of the present utility model also provides for a kind of direct current networking converter system, the load that described direct current networking converter system includes foregoing current transformer, multiple and described load branch is connected, and the power supply that multiple and described power supply branch road is connected.
Further, described power supply includes DC power supply and communication power supply, and described DC power supply is connected to the dc bus of described current transformer by DC-DC converter, and described communication power supply is connected to described dc bus by AC-DC converter.
Further, described DC power supply includes energy-storage battery and/or photovoltaic generator, and described communication power supply includes fuel generator, wind-driven generator and/or electrical network.
Further, described load includes DC load and AC load, and described DC load is connected to described dc bus by DC-DC converter, and described AC load is connected to described dc bus by AC-DC converter.
Switching bypass circuit, current transformer and the direct current networking converter system that this utility model embodiment provides, in the running of current transformer, by current transformer power supply branch road and load branch on switch is set, and utilize control unit to control being turned on or off of switch, realize the power supply that the selectivity switching of load is suitable, it is possible to be effectively ensured load and obtain reliable and stable power supply.
Accompanying drawing explanation
Fig. 1 is the structural representation of the converter system of micro-capacitance sensor in prior art;
Fig. 2 is the structural representation of the converter system being provided with switching bypass circuit of this utility model embodiment;
Fig. 3 is the structural representation of the control unit of the switching by-pass current of this utility model embodiment.
Drawing reference numeral illustrates:
10, converter system;11, DC-DC converter;12, AC-DC converter;13, DC-AC changer;14, dc bus;15, system is controlled;16, brake unit;20, energy-storage battery;21, photovoltaic generator;22, fuel generator;23, wind-driven generator;24, electrical network;30, DC load;31, AC load;32, ac bus;40, control unit;50 and 50', the first controlling brancher;51, the second controlling brancher;K1 and K1', the first control portion;K2, the second control portion;S1, S1-2 and S1-3, the first switch portion;S1', S1'-2 and S1'-3, the first switch portion;S2, S2'-2 and S2'-2, second switch portion;S3 and S3', switch;A1, A1' and A2, switching device.
Detailed description of the invention
Basic conception of the present utility model is, by the current transformer of micro-capacitance sensor in the prior art or converter system arrange switching bypass circuit, and utilize switching bypass circuit to switch suitable power supply for load, make load obtain reliable and stable power supply, and then effectively solve the current transformer of micro-capacitance sensor in prior art and break down and the problem that causes load interruptedly supplying power.
Before setting forth the technical solution of the utility model, the structure of the converter system of micro-capacitance sensor in prior art is carried out related description.As shown in Figure 1, the converter system 10 of micro-capacitance sensor includes dc bus 14 and control system 15, wherein, each power supply (is included the power supplies such as energy-storage battery 20, photovoltaic generator 21, fuel generator 22, wind-driven generator 23 and electrical network 24) and is connected respectively with dc bus 14 by DC-DC converter 11 or AC-DC converter 12, make each power supply carry electric energy to dc bus 14, or draw electric energy from dc bus 14;Dc bus 14 is connected with DC load 30 and AC load 31 respectively also by DC-DC converter 11 and DC-AC changer 13, powers for DC load 30 and AC load 31.Control system 15 respectively with DC-DC converter 11, AC-DC converter 12 and DC-AC changer 13, and protection device in converter system connects, for controlling the duty of these parts, to ensure that current transformer is properly functioning.Such as, control system 15 is connected with the brake unit 16 being connected on dc bus 14, being released the energy on dc bus 14 by brake unit 16, preventing overvoltage equivalent risk, thus ensureing stablizing of dc bus 14.
It is understandable that, in Fig. 1, it is connected to the AC-DC converter 12 between fuel generator 22 and dc bus 14 and the DC-AC changer 13 that is connected between electrical network 24 and dc bus 14 lays respectively at the both sides of dc bus 14, although it is different that two changers show in the drawings, but owing to their AC end is directed to alternating current power supply, DC end is directed to dc bus 14, and therefore, the two changer is same class changer.Additionally, the electric current between electrical network 24 and dc bus 14 is two-way, namely can be electrical network 24 to dc bus 14 power transmission, or dc bus 14 is to electrical network 24 power transmission, and the DC-AC changer 13 between electrical network 24 and dc bus 14 can adopt two-way changer.
Below in conjunction with accompanying drawing, the switching bypass circuit of this utility model embodiment, current transformer, direct current networking converter system are described in detail.
Fig. 2 is the structural representation of the converter system of the switching bypass circuit being provided with this utility model embodiment, this converter system can for the converter system 10 with multiple power supply shown in Fig. 1, the switching bypass circuit of this utility model embodiment can be used for selecting suitable power supply for the load of converter system 10, makes this converter system 10 provide reliable and stable power supply for load.
As in figure 2 it is shown, according to embodiment of the present utility model, this switching bypass circuit includes the switch being arranged on power supply branch road and load branch and the control unit 40 being connected with each switch;Wherein, power supply branch road is the branch road between the power supply of converter system 10 and the load of converter system 10, and load branch is the branch road being connected between the dc bus of converter system 10 and the load of converter system 10;Control unit 40 is used for controlling each switch conduction or disconnection.
When converter system 10 normal operation, the dc bus 14 in converter system 10 is powered to the load by load branch.As shown in Figure 2, direct current energy is converted to AC energy by DC-AC changer 13 and is transferred on ac bus 32 by dc bus 14, makes ac bus 32 can provide stable power supply for multiple AC loads 31.And occur that power supply trouble is (such as at converter system 10, converter system 10 internal part DC-AC changer 13 damages the power supply trouble caused) time, or needing current transformer from when excising to carry out maintenance work load, dc bus 14 can not power to the load.Now, control unit 40 switching selects in dc bus 14 bypass in multiple power supply branch roads, and controls the switch conduction on these power supply circuits, makes this power supply branch road provide stable power-supplying for load, and then improves the reliability of current transformer.
Specifically, when there is power supply trouble in dc bus 14, control unit 40 is by controlling the power supply branch road conducting being connected between fuel generator 22 and ac bus 32, or control the power supply branch road conducting being connected between electrical network 24 and ac bus 32, realize selecting fuel generator 22 or electrical network 24 to carry electric energy to ac bus 32 with correspondence, power for multiple AC loads 31.Control unit 40 preferably control between electrical network 24 and ac bus 32 power supply branch road conducting, make electrical network 24 power to multiple AC loads 31, it is prevented that excessive use fuel generator 22 and cause environmental pollution.
Preferably, as it is shown on figure 3, control unit 40 includes first controlling brancher identical with power supply branch road quantity, including the first controlling brancher 50 and the first controlling brancher 50', wherein, the first controlling brancher 50 is provided with the first control portion K1, the first controlling brancher 50' is provided with the first control portion K1';Each switch powering branch road includes the first switch portion, the first switch portion corresponding first control portion obtain electric after Guan Bi, disconnect after dead electricity.Specifically, power supply branch road is correspondingly provided with the first switch portion S1 corresponding for control portion K1 with first, or the first switch portion S1' corresponding for control portion K1' with first, first switch portion S1 and the first switch portion S1' respectively the first control portion K1 and the first control portion K1' obtain electric after Guan Bi, after dead electricity disconnect.The first described herein switch portion S1 and S1' is the aforesaid switch being arranged in power supply branch road, and control unit 40 selects corresponding power supply to be load energising by controlling the conducting of the first switch portion S1 and S1'.
In Fig. 3, the first controlling brancher 50' and the first controlling brancher 50 and two the power supply branch road one_to_one corresponding being connected fuel generator 22 and electrical network 24 in Fig. 2.When line fault or dc bus 14 unpowered voltage occur at load branch, such as, when current transformer connects electrical network 24, the first control portion K1 that control unit 40 controls on wherein the first controlling brancher 50 obtains electric, make the first switch portion S1 Guan Bi of its correspondence, and then control the power supply branch road conducting being connected with electrical network 24, make electrical network 24 power to multiple AC loads 31.Again such as, control unit 40 can obtain electric by the first control portion K1' on control another first controlling brancher 50', corresponding first switch portion S1' Guan Bi, makes the power supply branch road of fuel generator 22 correspondence turn on, fuel generator 22 powers to multiple AC loads 31.
In concrete application scenarios, control unit 40 is integrally disposed with the parts in converter system 10, can also arrange with the isolation of components in converter system 10, for controlling the switching bypass circuit of the present embodiment, make converter system 10 load can be carried out stable power-supplying.
Exist concurrently with multiple power supply when load being powered by the first controlling brancher, can power by prioritizing selection electrical network, and the same time only controls power supply by a kind of power supply.
Preferably, control unit 40 also includes second controlling brancher 51 identical with load branch quantity, and the second controlling brancher 51 is provided with the second control portion K2, and the switch of each load branch includes second switch portion S2, second switch portion S2 the second control portion K2 obtain electric after Guan Bi, after dead electricity disconnect.
The quantity of the second controlling brancher 51 in Fig. 3 is one, corresponding with the load branch being connected between ac bus 32 and dc bus 14 in Fig. 2.When dc bus 14 can provide normal power supply, the second control portion K2 that control unit 40 controls on the second controlling brancher 51 obtains electric, the second switch portion S2 making its correspondence closes, and then controls load branch conducting, makes dc bus 14 persistently can provide stable power-supplying to multiple AC loads 31.When there is power supply trouble in dc bus 14, control unit 40 controls the second control portion K2 dead electricity, make load branch disconnect, control unit 40 conducting controlled in bypass in two power supply branch roads, utilize fuel generator 22 or electrical network 24 to power to multiple AC loads 31.
Preferably, each first controlling brancher is additionally provided with additionally multiple first switch portion that the first control portion correspondence of other the first controlling brancher controls, such as, two other first switch portion S1-2 and S1-3 corresponding for the first control portion K1 in Fig. 3, first switch portion S1-2 and S1-3 is contrary with the first switch portion S1 action, namely the first control portion K1 obtain electric after disconnect, close after dead electricity, and first two other first switch portion S1'-2 and the S1'-3 corresponding for control portion K1', first switch portion S1'-2 and S1'-3 is contrary with the first switch portion S1' action, namely the first control portion K1' obtain electric after disconnect, close after dead electricity;Another one second switch portion S2-2 or S2-3 that the second control portion K2 correspondence being additionally provided with on the second controlling brancher 51 on each first controlling brancher controls, second switch portion S2-2 and S2-3 is contrary with the S2 action of second switch portion, namely the second control portion K2 obtain electric after disconnect, after dead electricity close.Each second controlling brancher 51 is additionally provided with outer multiple first switch portion of neck that additionally multiple first control portion correspondences control, for instance the first switch portion S1-2 and S1'-2.
When there is power supply trouble in dc bus 14, the second control portion K2 dead electricity on the second controlling brancher 51 that load branch is corresponding, second corresponding for control portion K2 second switch portion S2 disconnects and makes load branch disconnect, and two other second switch portion S2-2 and S2-3 corresponding for the second control portion K2 closes.Meanwhile, control unit 40 controls the first control portion K1 on the first controlling brancher 50 and obtains electric, and first corresponding for control portion K1 the first switch portion S1 Guan Bi, two other first switch portion S1-2 and S1-3 corresponding for the first control portion K1 disconnects.Control unit 40 also controls the first control portion K1' dead electricity on another first controlling brancher 50', the first switch portion S1' on another power supply branch road that first control portion K1' is corresponding disconnects, two other first switch portion S1'-2 and S1'-3 Guan Bi corresponding for the first control portion K1'.
Now, the first switch portion S1'-3, second switch portion S2-2 and the first control portion K1 on first controlling brancher 50 are in Guan Bi conducting state, then the first controlling brancher 50 turns on, and makes the power supply branch road of electrical network 24 correspondence turn on, electrical network 24 powers to multiple AC loads 31.And, the first switch portion S1-2-on the first switch portion S1-3 of the first controlling brancher 50' and the second controlling brancher 51 is in off-state, forbid that the first controlling brancher 50' and the second controlling brancher 51 turn on, and then control fuel generator 22 corresponding power supply branch road and load branch are off.So, control unit 40 just achieves the interlocking of multiple power supply branch road and a load branch and controls and be that load selects a power supply branch road, makes load obtain suitable power supply.
In like manner, when dc bus 14 can provide normal power supply, control unit 40 can make load branch turn on by interlocking control, and forbids that multiple power supply branch road turns on, and then control dc bus 14 provides stable power supply for multiple AC loads 31.
Preferably, each first controlling brancher and each second controlling brancher 51 are additionally provided with the switching device being connected with control unit 40.Such as, first controlling brancher 50 arranges switching device A1, first controlling brancher 50' arranges switching device A1', second controlling brancher 51 arranges switching device A2, control unit 40 can be passed through to control switching device A1, being turned on or off of A1' and A2, correspondingly control the first control portion K1, the first control portion K1' and the second control portion K2 whether electric, and then control being turned on or off of each power supply branch road and load branch conveniently and efficiently.
In the present embodiment, each power supply branch road is additionally provided with switch.Such as, arranging switch S3 on the power supply branch road of electrical network 24 correspondence, arrange switch S3' on the power supply branch road of fuel generator 22 correspondence, control unit 40 is connected with switching S3, S3', and it is turned on or off according to the working state control of current transformer.Such as, when DC-AC changer 13 on load branch breaks down, dc bus 14 can not be powered to multiple AC loads 31, control unit 40 control electrical network 24 to multiple AC loads 31 power while, switch S3, S3' conducting can also be controlled, make electrical network 24 and fuel generator 22 can carry electric energy on dc bus 14, make the dc bus 14 can to other load supplying, such as, the DC load on dc bus 14 it is connected to.
Here illustrate, power supply in the present embodiment is fuel generator 22 and electrical network 24, in other embodiments, power supply can also be other power supply, such as energy-storage battery 20, photovoltaic generator 21, wind-driven generator 23 etc., and the output voltage frequency of each power supply should be consistent with the electric voltage frequency of load.Additionally, the quantity of load circuit and power supply circuits can also be provided accordingly to one or more according to the concrete condition of current transformer.
As it has been described above, the switching bypass circuit of this utility model embodiment can be arranged in current transformer, in the running of current transformer, select suitable power supply for load, make load obtain reliable and stable power supply.
On this basis, embodiment of the present utility model also provides for a kind of current transformer, the load branch that this current transformer includes dc bus, multiple power supply branch road is connected, and the switching bypass circuit of this utility model embodiment as above with dc bus.Wherein, each power supply branch road and load branch are provided with connectivity port, for connecting DC load or AC load, and the power supply such as electrical network, fuel generator, energy-storage battery, switching bypass circuit can pass through to control being turned on or off of multiple power supply branch roads and load branch, selects suitable power supply for DC load or AC load.
Additionally, embodiment of the present utility model also provides for a kind of direct current networking converter system, this converter system includes the current transformer of the present embodiment as above, multiple load being connected with load branch and multiple power supply being connected with power supply branch road.Current transformer includes switching bypass circuit, and switching bypass circuit can select suitable power supply for load, it is ensured that converter system normal operation, and provides stable power-supplying for load.
Preferably, power supply includes DC power supply and communication power supply, and DC power supply is connected to dc bus by DC-DC converter, and undertaken direct current energy boosting or blood pressure lowering etc. processes and be transformed in dc bus galvanic current energy;Communication power supply is connected to dc bus by AC-DC converter, is processed the AC energy being converted in ac bus by direct current energy by rectification, inversion etc..
Preferably, DC power supply includes energy-storage battery and/or photovoltaic generator, and communication power supply includes fuel generator, wind-driven generator and/or electrical network.Wherein, energy-storage battery can be the types such as lithium battery, lead-acid battery, vanadium flow battery, super capacitor, and energy-storage battery can carry electric energy by DC-DC converter to dc bus, it is also possible to draws electric energy from dc bus and is charged.Photovoltaic generator exports a range of direct current energy by photovoltaic cell board component, accesses dc bus by DC-DC converter, it is possible to the direct current energy that photovoltaic changes is converted to constant direct current energy after being boosted by direct current energy.
Preferably, load includes DC load and AC load, and DC load is connected to dc bus by DC-DC converter, and AC load is connected to dc bus by AC-DC converter.The particular number of DC load and AC load and position is set, it is possible to arrange according to converter system concrete condition in practical application scene.
Switching bypass circuit, current transformer and the direct current networking converter system that this utility model embodiment provides, it is arranged on the power supply branch road of converter system and being turned on or off of the switch on load branch by control, in the running of current transformer, select suitable power supply for load, and then be effectively ensured load and obtain reliable and stable power supply.
Additionally, the switching bypass circuit of this utility model embodiment by carrying out interlocking control to multiple power supply branch roads and load branch, improve the stability into load supplying.
It may be noted that according to the needs implemented, all parts described in this application can be split as more multi-part, it is possible to the part operation of two or more parts or parts is combined into new parts, to realize the purpose of this utility model.
The above; it is only detailed description of the invention of the present utility model; but protection domain of the present utility model is not limited thereto; any those familiar with the art is in the technical scope that this utility model discloses; change can be readily occurred in or replace, all should be encompassed within protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with described scope of the claims.

Claims (10)

1. a switching bypass circuit, it is characterised in that including: be arranged on the switch on power supply branch road and load branch and the control unit (40) being connected with each described switch;Described power supply branch road is the branch road being connected between the power supply of converter system and the load of described converter system, and described load branch is the branch road being connected between the dc bus of converter system and the load of described converter system;Described control unit (40) is used for controlling each switch conduction or disconnection.
2. switching bypass circuit according to claim 1, it is characterised in that described control unit (40) includes first controlling brancher identical with described power supply branch road quantity, and described first controlling brancher is provided with the first control portion;
The switch of described power supply branch road includes the first switch portion, described first switch portion described first control portion obtain electric after Guan Bi, after dead electricity disconnect.
3. switching bypass circuit according to claim 2, it is characterized in that, described control unit (40) also includes second controlling brancher (51) identical with described load branch quantity, and described second controlling brancher (51) is provided with the second control portion (K2);
The switch of described load branch includes second switch portion (S2), described second switch portion (S2) described second control portion (K2) electric after Guan Bi, after dead electricity disconnect.
4. switching bypass circuit according to claim 3, it is characterized in that, each described first controlling brancher is additionally provided with additionally multiple first switch portion that the first control portion correspondence of other described first controlling brancher controls and the corresponding another one second switch portion controlled of described second control portion (K2);Each described second controlling brancher (51) is additionally provided with additionally multiple first switch portion that each described first control portion correspondence controls;Described additionally multiple first switch portion described first control portion obtain electric after disconnect, after dead electricity close;Described another one second switch portion (S2) described second control portion (K2) electric after disconnect, after dead electricity close.
5. switching bypass circuit according to claim 4, it is characterised in that being additionally provided with switching device on each described first controlling brancher and each described second controlling brancher, described switching device is connected with described control unit (40).
6. a current transformer, it is characterised in that described current transformer includes: the load branch that dc bus, multiple power supply branch road are connected with described dc bus, and the switching bypass circuit as according to any one of claim 1 to 5.
7. a direct current networking converter system, it is characterised in that the load that described direct current networking converter system includes current transformer as claimed in claim 6, multiple and described load branch is connected, and the power supply that multiple and described power supply branch road is connected.
8. direct current networking converter system according to claim 7, it is characterized in that, described power supply includes DC power supply and communication power supply, described DC power supply is connected to the dc bus of described current transformer by DC-DC converter, and described communication power supply is connected to described dc bus by AC-DC converter.
9. direct current networking converter system according to claim 8, it is characterised in that described DC power supply includes energy-storage battery and/or photovoltaic generator, and described communication power supply includes fuel generator, wind-driven generator and/or electrical network.
10. direct current networking converter system according to claim 8, it is characterized in that, described load includes DC load and AC load, and described DC load is connected to described dc bus by DC-DC converter, and described AC load is connected to described dc bus by AC-DC converter.
CN201620097622.5U 2016-01-29 2016-01-29 Switch bypass circuit, converter and direct current network deployment conversion system Active CN205377313U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105656079A (en) * 2016-01-29 2016-06-08 北京天诚同创电气有限公司 Bypass switching circuit, converter and DC networking converter system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105656079A (en) * 2016-01-29 2016-06-08 北京天诚同创电气有限公司 Bypass switching circuit, converter and DC networking converter system

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