CN208767854U - A kind of modularization super conductive magnetic storage energy structure - Google Patents
A kind of modularization super conductive magnetic storage energy structure Download PDFInfo
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- CN208767854U CN208767854U CN201821747993.9U CN201821747993U CN208767854U CN 208767854 U CN208767854 U CN 208767854U CN 201821747993 U CN201821747993 U CN 201821747993U CN 208767854 U CN208767854 U CN 208767854U
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Abstract
The utility model provides a kind of modularization super conductive magnetic storage energy structure, comprising: several superconducting magnets；The DC/DC chopper to connect one to one with superconducting magnet described in several；Electric capacity of voltage regulation；Current transformer；The output end of the DC/DC chopper is in parallel with the electric capacity of voltage regulation；The electric capacity of voltage regulation is in parallel with the DC terminal of the current transformer.The utility model is by implementing one to one configuration for superconducting magnet and DC/DC chopper, each superconducting magnet is separately independent of each other, the phenomenon that avoiding the occurrence of circulation, and it enables to by splitting the connection between DC/DC chopper and current transformer, it realizes freely assembling and splitting between each modularization superconducting magnet, there is higher flexibility.
Description
Technical field
The utility model relates to superconducting magnetic technical field more particularly to a kind of modularization super conductive magnetic storage energy structures.
Background technique
Compared with other energy storage technologies, super conductive magnetic storage energy (SMES) energy storage density with higher and energy storage efficiency,
Also have many advantages, such as fast response time and can independent control active and reactive power compensation.But the problems such as due to technology, cost,
Developing separate unit large capacity SMES has certain difficulty, and the modularization cloth of super conductive magnetic storage energy is realized by advanced control technology
Office, can solve the limitation of its capacity and power.
After super conductive magnetic storage energy modularization, how to realize freely assembling between each modularization superconducting magnet and fractionation is this
The technical issues of field technical staff's urgent need to resolve.
Utility model content
The utility model provides a kind of modularization super conductive magnetic storage energy structure, realizes between each modularization superconducting magnet
It freely assembles and splits.
The utility model provides a kind of modularization super conductive magnetic storage energy structure, comprising:
Several superconducting magnets；
The DC/DC chopper to connect one to one with superconducting magnet described in several；
Electric capacity of voltage regulation；
Current transformer；
The output end of the DC/DC chopper is in parallel with the electric capacity of voltage regulation；
The electric capacity of voltage regulation is in parallel with the DC terminal of the current transformer.
Optionally, the DC/DC chopper includes: full-controlled switch G1, diode D1, full-controlled switch G2And diode
D2；
The full-controlled switch G1, the diode D1, the full-controlled switch G2, the diode D2With the superconduction
The inductance of magnet forms H bridge-type structure；
The inductance connection of the superconducting magnet is in the centre of the H bridge-type structure.
Optionally, the current transformer is specially voltage converter.
Optionally, the full-controlled switch is specially IGBT.
Optionally, the diode is specially quick power diode.
As can be seen from the above technical solutions, the utility model has the advantage that
The utility model provides a kind of modularization super conductive magnetic storage energy structure, comprising: several superconducting magnets；With several
The DC/DC chopper that the superconducting magnet connects one to one；Electric capacity of voltage regulation；Current transformer；The output end of the DC/DC chopper
It is in parallel with the electric capacity of voltage regulation；The electric capacity of voltage regulation is in parallel with the DC terminal of the current transformer.
The utility model is by implementing one to one configuration for superconducting magnet and DC/DC chopper, by each superconducting magnet point
The phenomenon that opening and be independent of each other, avoiding the occurrence of circulation, and enable to by splitting the company between DC/DC chopper and current transformer
It connects, realizes freely assembling and splitting between each modularization superconducting magnet, there is higher flexibility.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property
It puts, can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is a kind of structural block diagram of modularization super conductive magnetic storage energy structure provided by the utility model；
Fig. 2 is the circuit structure diagram of modularization super conductive magnetic storage energy structure provided by the utility model；
Fig. 3 is the circuit structure diagram of multiple modularization super conductive magnetic storage energy structures provided by the utility model；
Wherein, appended drawing reference are as follows:
1, superconducting magnet；2, DC/DC chopper；3, current transformer；4, power grid.
Specific embodiment
The utility model embodiment provides a kind of modularization super conductive magnetic storage energy structure, realizes each modularization superconducting magnet
Between freely assemble and split.
It, below will knot to enable the purpose of utility model, feature, advantage of the utility model more obvious and understandable
The attached drawing in the utility model embodiment is closed, the technical scheme in the utility model embodiment is clearly and completely described,
Obviously, the embodiments described below are only the utility model a part of the embodiment, and not all embodiment.Based on this reality
It is obtained by those of ordinary skill in the art without making creative efforts all other with the embodiment in novel
Embodiment is fallen within the protection scope of the utility model.
It please referring to Fig.1 to Fig.3, the utility model provides a kind of one embodiment of modularization super conductive magnetic storage energy structure,
Include:
Several superconducting magnets 1；
The DC/DC chopper 2 to connect one to one with several superconducting magnets 1；
Electric capacity of voltage regulation；
Current transformer 3；
The output end of DC/DC chopper 2 is in parallel with electric capacity of voltage regulation；
Electric capacity of voltage regulation is in parallel with the DC terminal of current transformer 3；
The utility model is by implementing one to one configuration for superconducting magnet 1 and DC/DC chopper 2, by each superconducting magnet 1
The phenomenon that being separately independent of each other, avoiding the occurrence of circulation, and enable to by splitting between DC/DC chopper 2 and current transformer 3
Connection, realize freely assembling and splitting between each modularization superconducting magnet 1, have higher flexibility.
Further, DC/DC chopper 2 includes: full-controlled switch G1, diode D1, full-controlled switch G2And diode
D2；
Full-controlled switch G1, diode D1, full-controlled switch G2, diode D2H bridge type knot is formed with the inductance of superconducting magnet
Structure；
The inductance connection of superconducting magnet 1 is in the centre of H bridge-type structure.
Further, current transformer 3 is specially voltage converter.
Further, full-controlled switch is specially IGBT.
Further, diode is specially quick power diode.
It should be noted that in entire network system, it can be by control IGBT triggering mode to rectification and inversion list
Member is controlled, also, passes through control full-controlled switch G1And G2The turn-on and turn-off time, to control the electricity of superconducting magnet
Charging, afterflow and the electric discharge of sense.
For the operating mode of three kinds of superconducting magnets, control method is as follows:
Freewheeling mode: full-controlled switch G1Conducting, full-controlled switch G2Shutdown (or full-controlled switch G1Shutdown, full-control type are opened
Close G2Conducting), flow through the inductance L of superconducting magnetSCElectric current iSCPass through full-controlled switch G1The inductance L of superconducting magnetSC- two poles
Pipe D1Form circulation.When ignoring the loss of each switch element, electric current iSCIt remains unchanged, the inductance L of superconducting magnetSCMiddle storage
Energy is constant, and DC/DC chopper 2 is in freewheeling state；
Charge mode: full-controlled switch G1With full-controlled switch G2It simultaneously turns on, power grid 4 passes through current transformer 3- electric capacity of voltage regulation-
The inductance L of superconducting magnetSCFull-controlled switch G2To the inductance L of superconducting magnetSCCharging, passes through the inductance L of superconducting magnetSC
Electric current iSCRise, the inductance L of superconducting magnetSCThe energy of middle storage increases.At this point, DC/DC chopper 2 is in charged state,
Voltage u in superconducting magnet 1SCWith the voltage u on electric capacity of voltage regulationdcIt is equal.
Discharge mode: full-controlled switch G1With full-controlled switch G2End simultaneously, superconducting magnet 1 passes through diode D1Superconduction
The inductance L of magnetSCDiode D2Electric capacity of voltage regulation-current transformer 3 releases energy to power grid 4, passes through the inductance of superconducting magnet
LSCElectric current iSCDecline, the inductance L of superconducting magnetSCThe energy of middle storage is reduced.At this point, DC/DC chopper 2 is in electric discharge shape
State, the voltage u in superconducting magnet 1SCWith the voltage u on electric capacity of voltage regulationdcIt is equal in magnitude, it is contrary.
2 two quadrant jobs of energy of DC/DC chopper, no matter the work of current transformer 3 can ensure to flow in rectification or inverter mode
Inductance L through superconducting magnetSCElectric current iSCThe L in the inductance of superconducting magnetSCFlow direction is constant.Thus by adjusting full control
Type switch G1With full-controlled switch G2The mean power opened in i.e. controllable one switch periods of superconducting magnet of duty ratio.
By taking P/Q is controlled as an example, full-controlled switch G1Open shutdown by DC voltage control, full-controlled switch G2It is open-minded
Shutdown is by value and power reference PrefControl.
(1) when superconducting magnet needs to absorb power, detect that the voltage of DC bus rises, then full-controlled switch G1It opens
It is logical, and full-controlled switch G2Open duty ratio be D, superconducting magnet is in charging/freewheeling state, then in a switch periods
In, the average absorption power of superconducting magnet are as follows:
PSMES=udc·iSC·D；
Then duty ratio calculation formula are as follows:
(2) when superconducting magnet needs output power, the voltage decline of DC bus is detected, then full-controlled switch G1It closes
Disconnected, full-controlled switch G2Open duty ratio be D, superconducting magnet is in electric discharge/freewheeling state, then in a switch periods,
The average output power of superconducting magnet are as follows:
PSMES==udc·iSC·(1-D)；
Then duty ratio calculation formula are as follows:
The advantages of the utility model has is as follows:
1) Power Exchange of each superconducting magnet is mutually indepedent, can mention according to actual needs, by increasing number of modules
High energy storage power, assembling flexibly, avoid redundancy, have both solved the difficulty of large capacity SMES production, it is quickly big also to play SMES
The advantage of power response.
2) in the case where equivalent capability, the cost of manufacture separate unit large-capacity power electronic device is greater than more little Rong of manufacture
The cost of amount, and the manufacturing cost of superconducting magnetic energy storage system power electronic devices is very high, Gu the utility model can be saved into
This.
3) conventional method of large capacity SMES is manufactured mainly by the parallel connection of multiple superconducting magnets, but due to the difference of magnet
Lead to circulation occur, the utility model can improve the safe operation ability of equipment to avoid circulation phenomenon.
4), can be out of service without influencing other superconducting magnets in time when one of superconducting magnet breaks down,
Facilitate maintenance.
The above, above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；Although ginseng
The utility model is described in detail according to previous embodiment, those skilled in the art should understand that: it is still
It is possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is equally replaced
It changes；And these are modified or replaceed, various embodiments of the utility model technical solution that it does not separate the essence of the corresponding technical solution
Spirit and scope.
Claims (5)
1. a kind of modularization super conductive magnetic storage energy structure characterized by comprising
Several superconducting magnets；
The DC/DC chopper to connect one to one with superconducting magnet described in several；
Electric capacity of voltage regulation；
Current transformer；
The output end of the DC/DC chopper is in parallel with the electric capacity of voltage regulation；
The electric capacity of voltage regulation is in parallel with the DC terminal of the current transformer.
2. modularization super conductive magnetic storage energy structure according to claim 1, which is characterized in that the DC/DC chopper includes:
Full-controlled switch G1, diode D1, full-controlled switch G2With diode D2；
The full-controlled switch G1, the diode D1, the full-controlled switch G2, the diode D2With the superconducting magnet
Inductance forms H bridge-type structure；
The inductance connection of the superconducting magnet is in the centre of the H bridge-type structure.
3. modularization super conductive magnetic storage energy structure according to claim 1, which is characterized in that the current transformer is specially voltage
Source type current transformer.
4. modularization super conductive magnetic storage energy structure according to claim 2, which is characterized in that the full-controlled switch is specially
IGBT。
5. modularization super conductive magnetic storage energy structure according to claim 2, which is characterized in that the diode is specially quick
Power diode.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109193953A (en) * | 2018-10-26 | 2019-01-11 | 广东电网有限责任公司 | A kind of modularization super conductive magnetic storage energy structure and control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109193953A (en) * | 2018-10-26 | 2019-01-11 | 广东电网有限责任公司 | A kind of modularization super conductive magnetic storage energy structure and control method |
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