CN109659942A - A kind of power-type flexible power supply device - Google Patents
A kind of power-type flexible power supply device Download PDFInfo
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- CN109659942A CN109659942A CN201811643668.2A CN201811643668A CN109659942A CN 109659942 A CN109659942 A CN 109659942A CN 201811643668 A CN201811643668 A CN 201811643668A CN 109659942 A CN109659942 A CN 109659942A
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/02—Circuit arrangements for ac mains or ac distribution networks using a single network for simultaneous distribution of power at different frequencies; using a single network for simultaneous distribution of ac power and of dc power
Abstract
The present invention relates to a kind of power-type flexible power supply device, described device includes: DC bus, the first AC/DC module, the 2nd AC/DC module, the 3rd AC/DC module and at least one DC/AC module；The first AC/DC module, the 2nd AC/DC module and the 3rd AC/DC module are respectively used to being converted to the alternating current of the three phase mains of low-voltage network into direct current, and direct current is electrically accessed the DC bus；The DC/AC module, for the direct current on the DC bus to be converted to the alternating current that its corresponding load uses.Technical solution provided by the invention can connect the load of different capacity type, increase the flexibility of power supply mode, reduces dilatation and track remodelling cost when load increase, realizes the dynamic allocation of low-voltage network power.
Description
Technical field
The present invention relates to technical field of electric power, and in particular to a kind of power-type flexible power supply device.
Background technique
Generally there are following problems for low-voltage network: the network structure of power distribution network and operational mode flexibility, interactivity are not
Foot, it is difficult to meet the flexible access and ordered electric of uncertain load；Primary equipment lacks flexible power flow regulating and voltage
Control means, without the ability that can flexibly distribute rationally, the utilization rate of power equipment is relatively low；Power is simply divided in portion,
Do not have dynamic power distribution function.
In view of the above-mentioned problems, proposing power-type flexible power supply device.Existing power-type flexible power supply device is generally adopted
With power electronic devices, transformation of electrical energy, voltage conversion, power transmission and power quality are realized by Technics of Power Electronic Conversion technology
The newcooperative medical system electric device of improvement.But existing power-type flexible power supply device, towards uncertain load access and power
When support demand, structure will become complicated, and expansibility is poor, and economic cost is high.
Summary of the invention
In view of the deficiencies of the prior art, it the object of the present invention is to provide a kind of power-type flexible power supply device, can connect
The load of different capacity type increases the flexibility of power supply mode, reduce load increase when dilatation and track remodelling at
This, realizes the dynamic allocation of low-voltage network power.
The purpose of the present invention is adopt the following technical solutions realization:
A kind of power-type flexible power supply device, it is improved in that described device includes: DC bus, the first AC/DC
Module, the 2nd AC/DC module, the 3rd AC/DC module and at least one DC/AC module；
The first AC/DC module, the 2nd AC/DC module and the 3rd AC/DC module are respectively used to low-voltage network
The alternating current of three phase mains is converted to direct current, and direct current is electrically accessed the DC bus；
The DC/AC module, for the direct current on the DC bus to be converted to the exchange that its corresponding load uses
Electricity.
Preferably, one end of the exchange side of the first AC/DC module is connected with a of the three phase mains of low-voltage network
It connects, the other end is connect with the neutral point of transformer in low-voltage network；
One end of the exchange side of the 2nd AC/DC module is connected with the b of the three phase mains of low-voltage network, the other end
It is connect with the neutral point of transformer in low-voltage network；
One end of the exchange side of the 3rd AC/DC module is connected with the c of the three phase mains of low-voltage network, the other end
It is connect with the neutral point of transformer in low-voltage network.
Further, the first AC/DC module, the 2nd AC/DC module and the 3rd AC/DC module by the first bridge arm,
Second bridge arm, reactance L and capacitor CdcComposition；
Wherein, first bridge arm includes concatenated switching device G1With switching device G2；
Second bridge arm includes concatenated switching device G3With switching device G4；
The switching device G1Collector terminal be connected to the anode of DC bus, the switching device G2Emitter terminal
It is connected to the cathode of DC bus；
The switching device G3Collector terminal be connected to the anode of DC bus, the switching device G4Emitter terminal
It is connected to the cathode of DC bus；
The switching device G3With switching device G4Between tie point connect with the neutral conductor；
The capacitor CdcAnode connect with the positive of DC bus, capacitor CdcCathode and DC bus cathode connect
It connects；
One end of the reactance L of the first AC/DC module and the switching device G of the first AC/DC module1With described
The switching device G of one AC/DC module2Between tie point connection, the other end is connected with the three phase mains a of low-voltage network；
One end of the reactance L of the 2nd AC/DC module and the switching device G of the 2nd AC/DC module1With described
The switching device G of two AC/DC modules2Between tie point connection, the other end is connected with the three phase mains b of low-voltage network；
One end of the reactance L of the 3rd AC/DC module and the switching device G of the 3rd AC/DC module1With described
The switching device G of three AC/DC modules2Between tie point connection, the other end is connected with the three phase mains c of low-voltage network.
Specifically, the switching device G1Diode D1 including IGBT1 and with the IGBT1 reverse parallel connection；
The switching device G2Diode D2 including IGBT2 and with the IGBT2 reverse parallel connection；
The switching device G3Diode D3 including IGBT3 and with the IGBT3 reverse parallel connection；
The switching device G4Diode D4 including IGBT4 and with the IGBT4 reverse parallel connection.
Preferably, the DC/AC module includes: third bridge arm, four bridge legs, reactance L* and capacitor Cdc*；
The third bridge arm includes concatenated switching device G5With switching device G6；
The four bridge legs include concatenated switching device G7With switching device G8；
The switching device G5Collector terminal be connected to the anode of DC bus, the switching device G6Emitter terminal
It is connected to the cathode of DC bus；
The switching device G7Collector terminal be connected to the anode of DC bus, the switching device G8Emitter terminal
It is connected to the cathode of DC bus；
The switching device G5With switching device G6Between tie point connect with load anode；
One end of the reactance L* and switching device G7With switching device G8Between tie point connection, the other end and load are negative
Pole connection；
The capacitor Cdc* anode is connect with the anode of DC bus, capacitor Cdc* the cathode of cathode and DC bus
Connection.
Further, the switching device G5Diode D5 including IGBT5 and with the IGBT5 reverse parallel connection；
The switching device G6Diode D6 including IGBT6 and with the IGBT6 reverse parallel connection；
The switching device G7Diode D7 including IGBT7 and with the IGBT7 reverse parallel connection；
The switching device G8Diode D8 including IGBT8 and with the IGBT8 reverse parallel connection.
Compared with the immediate prior art, the invention has the benefit that
Technical solution provided by the invention passes through DC bus, the first AC/DC module, the 2nd AC/DC module, the 3rd AC/
DC module and at least one DC/AC module construct a kind of power-type flexible power supply device, utilize the first AC/DC module, the 2nd AC/
The alternating current of the three phase mains of low-voltage network is converted to direct current by DC module and the 3rd AC/DC module, and direct current is connect
Enter the DC bus, the direct current on the DC bus is converted into the friendship that its corresponding load uses using DC/AC module
Galvanic electricity can connect the load of different capacity type, increase the flexibility of power supply mode, reduce dilatation when load increase
With track remodelling cost, the dynamic allocation of low-voltage network power are realized.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of power-type flexible power supply device in the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of AC/DC module in the embodiment of the present invention；
Fig. 3 is the structural schematic diagram of DC/AC module in the embodiment of the present invention；
In Fig. 1, DC_PFor DC bus anode, DC_NFor DC bus cathode；In Fig. 2, DC_PIt is positive for DC bus,
DC_NFor DC bus cathode；In Fig. 3, DC_PFor DC bus anode, DC_NFor DC bus cathode.
Specific embodiment
Specific embodiments of the present invention will be described in further detail with reference to the accompanying drawing.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
All other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
The present invention provides a kind of power-type flexible power supply devices, as shown in Figure 1, described device includes: DC bus,
One AC/DC module, the 2nd AC/DC module, the 3rd AC/DC module and at least one DC/AC module；
The first AC/DC module, the 2nd AC/DC module and the 3rd AC/DC module are respectively used to low-voltage network
The alternating current of three phase mains is converted to direct current, and direct current is electrically accessed the DC bus；
The DC/AC module, for the direct current on the DC bus to be converted to the exchange that its corresponding load uses
Electricity.
Further, one end of the exchange side of the first AC/DC module is connected with a of the three phase mains of low-voltage network
It connects, the other end is connect with the neutral point of transformer in low-voltage network；
One end of the exchange side of the 2nd AC/DC module is connected with the b of the three phase mains of low-voltage network, the other end
It is connect with the neutral point of transformer in low-voltage network；
One end of the exchange side of the 3rd AC/DC module is connected with the c of the three phase mains of low-voltage network, the other end
It is connect with the neutral point of transformer in low-voltage network.
Specifically, as shown in Fig. 2, the first AC/DC module, the 2nd AC/DC module and the 3rd AC/DC module are by
One bridge arm, the second bridge arm, reactance L and capacitor CdcComposition；
Wherein, first bridge arm includes concatenated switching device G1With switching device G2；
Second bridge arm includes concatenated switching device G3With switching device G4；
The switching device G1Collector terminal be connected to the positive DC of DC bus_P, the switching device G2Transmitting
Extremely it is connected to the cathode DC of DC bus_N；
The switching device G3Collector terminal be connected to the positive DC of DC bus_P, the switching device G4Transmitting
Extremely it is connected to the cathode DC of DC bus_N；
The switching device G3With switching device G4Between tie point connect with the neutral conductor；
The capacitor CdcAnode and the positive DC of DC bus_PConnection, capacitor CdcCathode and DC bus cathode
DC_NConnection；
One end of the reactance L of the first AC/DC module and the switching device G of the first AC/DC module1With described
The switching device G of one AC/DC module2Between tie point connection, the other end is connected with the three phase mains a of low-voltage network；
One end of the reactance L of the 2nd AC/DC module and the switching device G of the 2nd AC/DC module1With described
The switching device G of two AC/DC modules2Between tie point connection, the other end is connected with the three phase mains b of low-voltage network；
One end of the reactance L of the 3rd AC/DC module and the switching device G of the 3rd AC/DC module1With described
The switching device G of three AC/DC modules2Between tie point connection, the other end is connected with the three phase mains c of low-voltage network.
Wherein, the switching device G1Diode D1 including IGBT1 and with the IGBT1 reverse parallel connection；
The switching device G2Diode D2 including IGBT2 and with the IGBT2 reverse parallel connection；
The switching device G3Diode D3 including IGBT3 and with the IGBT3 reverse parallel connection；
The switching device G4Diode D4 including IGBT4 and with the IGBT4 reverse parallel connection.
Further, as shown in figure 3, the DC/AC module includes: third bridge arm, four bridge legs, reactance L* and capacitor
Cdc*；
The third bridge arm includes concatenated switching device G5With switching device G6；
The four bridge legs include concatenated switching device G7With switching device G8；
The switching device G5Collector terminal be connected to the positive DC of DC bus_P, the switching device G6Transmitting
Extremely it is connected to the cathode DC of DC bus_N；
The switching device G7Collector terminal be connected to the positive DC of DC bus_P, the switching device G8Transmitting
Extremely it is connected to the cathode DC of DC bus_N；
The switching device G5With switching device G6Between tie point connect with load anode；
One end of the reactance L* and switching device G7With switching device G8Between tie point connection, the other end and load are negative
Pole connection；
The capacitor Cdc* the positive DC of anode and DC bus_PConnection, capacitor Cdc* cathode and DC bus it is negative
Pole DC_NConnection.
Specifically, the switching device G5Diode D5 including IGBT5 and with the IGBT5 reverse parallel connection；
The switching device G6Diode D6 including IGBT6 and with the IGBT6 reverse parallel connection；
The switching device G7Diode D7 including IGBT7 and with the IGBT7 reverse parallel connection；
The switching device G8Diode D8 including IGBT8 and with the IGBT8 reverse parallel connection.
Specifically, the power summation of all DC/AC module output ends is less than or equal to the first AC/DC module, the 2nd AC/
The power summation of the input terminal of DC module and the 3rd AC/DC module；
For example, the power of input terminal of the first AC/DC module, the 2nd AC/DC module and the 3rd AC/DC module is
200W, then the power summation of all DC/AC module corresponding loads can only be less than equal to 600W, but the rated power of load can not
It is identical；
It can thus be seen that a kind of power-type flexible power supply device provided by the invention can connect different capacity type
Load meets the access and power support demand of uncertain load, increases the flexibility of power supply mode, reduce load increasing
The dilatation and track remodelling cost of added-time, realizes the dynamic allocation of low-voltage network power.
It should be understood by those skilled in the art that, embodiments herein can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the application, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The application is referring to method, the process of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, to the greatest extent
Invention is explained in detail referring to above-described embodiment for pipe, it should be understood by those ordinary skilled in the art that: still
It can be with modifications or equivalent substitutions are made to specific embodiments of the invention, and without departing from any of spirit and scope of the invention
Modification or equivalent replacement, should all cover within the scope of the claims of the present invention.
Claims (6)
1. a kind of power-type flexible power supply device, which is characterized in that described device include: DC bus, the first AC/DC module,
2nd AC/DC module, the 3rd AC/DC module and at least one DC/AC module；
The first AC/DC module, the 2nd AC/DC module and the 3rd AC/DC module are respectively used to the three-phase of low-voltage network
The alternating current of power supply is converted to direct current, and direct current is electrically accessed the DC bus；
The DC/AC module, for the direct current on the DC bus to be converted to the alternating current that its corresponding load uses.
2. device as described in claim 1, which is characterized in that one end of the exchange side of the first AC/DC module and low pressure
The a of the three phase mains of power distribution network is connected, and the other end is connect with the neutral point of transformer in low-voltage network；
One end of the exchange side of the 2nd AC/DC module is connected with the b of the three phase mains of low-voltage network, the other end with it is low
It is press-fitted the neutral point connection of transformer in power grid；
One end of the exchange side of the 3rd AC/DC module is connected with the c of the three phase mains of low-voltage network, the other end with it is low
It is press-fitted the neutral point connection of transformer in power grid.
3. device as claimed in claim 2, which is characterized in that the first AC/DC module, the 2nd AC/DC module and third
AC/DC module is by the first bridge arm, the second bridge arm, reactance L and capacitor CdcComposition；
Wherein, first bridge arm includes concatenated switching device G1With switching device G2；
Second bridge arm includes concatenated switching device G3With switching device G4；
The switching device G1Collector terminal be connected to the anode of DC bus, the switching device G2Emitter terminal connection
In the cathode of DC bus；
The switching device G3Collector terminal be connected to the anode of DC bus, the switching device G4Emitter terminal connection
In the cathode of DC bus；
The switching device G3With switching device G4Between tie point connect with the neutral conductor；
The capacitor CdcAnode connect with the positive of DC bus, capacitor CdcCathode and DC bus cathode connect；
One end of the reactance L of the first AC/DC module and the switching device G of the first AC/DC module1With the first AC/
The switching device G of DC module2Between tie point connection, the other end is connected with the three phase mains a of low-voltage network；
One end of the reactance L of the 2nd AC/DC module and the switching device G of the 2nd AC/DC module1With the 2nd AC/
The switching device G of DC module2Between tie point connection, the other end is connected with the three phase mains b of low-voltage network；
One end of the reactance L of the 3rd AC/DC module and the switching device G of the 3rd AC/DC module1With the 3rd AC/
The switching device G of DC module2Between tie point connection, the other end is connected with the three phase mains c of low-voltage network.
4. device as claimed in claim 3, which is characterized in that the switching device G1It is anti-including IGBT1 and with the IGBT1
To diode D1 in parallel；
The switching device G2Diode D2 including IGBT2 and with the IGBT2 reverse parallel connection；
The switching device G3Diode D3 including IGBT3 and with the IGBT3 reverse parallel connection；
The switching device G4Diode D4 including IGBT4 and with the IGBT4 reverse parallel connection.
5. device as described in claim 1, which is characterized in that the DC/AC module includes: third bridge arm, four bridge legs, electricity
Anti- L* and capacitor Cdc*；
The third bridge arm includes concatenated switching device G5With switching device G6；
The four bridge legs include concatenated switching device G7With switching device G8；
The switching device G5Collector terminal be connected to the anode of DC bus, the switching device G6Emitter terminal connection
In the cathode of DC bus；
The switching device G7Collector terminal be connected to the anode of DC bus, the switching device G8Emitter terminal connection
In the cathode of DC bus；
The switching device G5With switching device G6Between tie point connect with load anode；
One end of the reactance L* and switching device G7With switching device G8Between tie point connection, the other end and load cathode connect
It connects；
The capacitor Cdc* anode is connect with the anode of DC bus, capacitor Cdc* the cathode of cathode and DC bus connects.
6. device as claimed in claim 5, which is characterized in that the switching device G5It is anti-including IGBT5 and with the IGBT5
To diode D5 in parallel；
The switching device G6Diode D6 including IGBT6 and with the IGBT6 reverse parallel connection；
The switching device G7Diode D7 including IGBT7 and with the IGBT7 reverse parallel connection；
The switching device G8Diode D8 including IGBT8 and with the IGBT8 reverse parallel connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811643668.2A CN109659942A (en) | 2018-12-29 | 2018-12-29 | A kind of power-type flexible power supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811643668.2A CN109659942A (en) | 2018-12-29 | 2018-12-29 | A kind of power-type flexible power supply device |
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| Publication Number | Publication Date |
|---|---|
| CN109659942A true CN109659942A (en) | 2019-04-19 |
Family
ID=66118189
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811643668.2A Pending CN109659942A (en) | 2018-12-29 | 2018-12-29 | A kind of power-type flexible power supply device |
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|---|---|---|---|---|
| CN103259423A (en) * | 2012-02-16 | 2013-08-21 | 台达电子企业管理（上海）有限公司 | Three-phase AC-DC changing circuit, three-phase AC-DC changing method and control system of three-phase AC-DC changing circuit |
| CN104836455A (en) * | 2015-04-27 | 2015-08-12 | 湖南大学 | Power distribution network power electronic transformer and control method thereof |
| CN105071377A (en) * | 2015-07-17 | 2015-11-18 | 华中科技大学 | Power island |
| US20170077834A1 (en) * | 2014-03-05 | 2017-03-16 | General Electric Technology Gmbh | Voltage source converter |
| CN107800133A (en) * | 2017-11-28 | 2018-03-13 | 郑州云海信息技术有限公司 | A kind of data center's method of supplying power to and structure |
-
2018
- 2018-12-29 CN CN201811643668.2A patent/CN109659942A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103259423A (en) * | 2012-02-16 | 2013-08-21 | 台达电子企业管理（上海）有限公司 | Three-phase AC-DC changing circuit, three-phase AC-DC changing method and control system of three-phase AC-DC changing circuit |
| US20170077834A1 (en) * | 2014-03-05 | 2017-03-16 | General Electric Technology Gmbh | Voltage source converter |
| CN104836455A (en) * | 2015-04-27 | 2015-08-12 | 湖南大学 | Power distribution network power electronic transformer and control method thereof |
| CN105071377A (en) * | 2015-07-17 | 2015-11-18 | 华中科技大学 | Power island |
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Application publication date: 20190419 |
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