CN104078220A - Inductor and resistor compound superconducting reactor - Google Patents
Inductor and resistor compound superconducting reactor Download PDFInfo
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- CN104078220A CN104078220A CN201410363880.9A CN201410363880A CN104078220A CN 104078220 A CN104078220 A CN 104078220A CN 201410363880 A CN201410363880 A CN 201410363880A CN 104078220 A CN104078220 A CN 104078220A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
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Abstract
The invention discloses an inductor and resistor compound superconducting reactor. The technical keys are that the superconducting reactor mainly comprises a superconducting inductive coil, a superconducting non-inductive coil, a low-temperature Dewar component, low-temperature insulating sleeves, superconducting binary current leads, superconducting transition leads and low-temperature refrigerant pipelines, wherein the superconducting inductive coil and the superconducting non-inductive coil are both completely soaked in low-temperature refrigerants inside the low-temperature Dewar component; the low-temperature insulating sleeves, the superconducting binary current leads and the low-temperature refrigerant pipelines are all connected with sealing cover plates of the low-temperature Dewar component; the superconducting inductive coil is connected in series with the superconducting non-inductive coil through the superconducting transition leads, and is connected with the superconducting binary current leads, so as to form the inductor and resistor compound superconducting reactor provided with a fixed inductance value and a variable resistance value. The superconducting reactor has the application characteristics of both the fixed inductance value of a single superconducting reactor and the variable resistance value of a single superconducting non-inductive coil, and can simultaneously have the current-limiting and power compensating function of an electric power system, as well as the high-efficient neutral point grounding function.
Description
Technical field
The present invention relates in field of power, particularly a kind of reactor for electric power system current limliting, power back-off and neutral ground.
Background technology
The reactor with Power Systems compensation or current-limiting function has a wide range of applications in power transmission and distribution system and electric device system.Particularly there is very high permission working current density and be approximately the introducing of the superconductor of zero resistivity, the super conducting electric reactor that makes to be formed by superconductivity wire coiling has the technological merit that conventional copper or aluminium reactor cannot be realized, as large in operating current, running wastage is low, volume is little, lightweight etc.
The correlative study of the super conducting electric reactor with reactive power compensation or short trouble current-limiting function of applying in high-voltage AC transmission system at present, and the super conducting electric reactor with voltage fluctuation compensation or short trouble current-limiting function of applying in HVDC (High Voltage Direct Current) transmission system has obtained certain progress.But, still do not possess at present the super conducting electric reactor of electric power system compensation and current-limiting function simultaneously, especially do not relate to the practical technique scheme of inductance and the compound super conducting electric reactor of resistance.In addition, the superconduction noninductive coil device with variable resistor amount that utilizes the quench characteristic of superconductivity wire to develop is also able to practical application in short-circuit fault of power system current limliting, but superconduction noninductive coil device does not possess electric power system compensate function.As for current transformer neutral point earthing reactor, due to the existence of conventional wires resistance, cannot solve effective grounding and meet the contradiction between the requirement of current limliting high impedance.
Summary of the invention
The object of the invention is to overcome existing above-mentioned deficiency in prior art, a kind of inductance with fixed inductance value and variable resistance for electric power system current limliting, power back-off and neutral ground and the compound super conducting electric reactor of resistance are provided.
In order to realize foregoing invention object, the technical solution used in the present invention is: the compound super conducting electric reactor of a kind of inductance and resistance, comprising:
Superconduction inductance coil portion, comprises a superconduction inductance coil, the bobbin of superconduction inductance coil, and for upper backup pad, the lower supporting plate of fixing superconduction inductance coil are installed, described upper backup pad is connected by screw connection with lower supporting plate;
Superconduction noninductive coil portion, comprises a superconduction noninductive coil, the bobbin of superconduction noninductive coil, and for upper backup pad, the lower supporting plate of fixing superconduction noninductive coil are installed, described upper backup pad is connected by screw connection with lower supporting plate;
Also comprise cooled cryostat parts, described cooled cryostat parts top is provided with seal cover board, described superconduction inductance coil portion and superconduction noninductive coil portion are all fully immersed in the low-temperature refrigerant in cooled cryostat parts, and after described superconduction inductance coil portion and superconduction noninductive coil portion are connected and fixed by screw connection, then be fixed on seal cover board by another screw connection; The fluid pipeline of the input duct of low-temperature refrigerant and low-temperature refrigerant is separately positioned on described seal cover board, and stretch to cooled cryostat components interior, be connected with the cryogenic refrigerating system that is positioned at cooled cryostat parts outside simultaneously, composition low-temperature refrigerant circularly cooling loop, for cooling superconduction inductance coil and superconduction noninductive coil;
Also comprise superconduction binary current lead parts, described superconduction binary current lead parts are fixed in the low-temperature insulation sleeve pipe on seal cover board, and its underpart is positioned at the inside of cooled cryostat parts, and top is connected with low-temperature insulation sleeve pipe; After described superconduction inductance coil is connected with the series connection of superconduction noninductive coil by superconduction transition wire, be connected with the bottom of superconduction binary current lead again, the top of superconduction binary current lead also be positioned at cooled cryostat parts outside exchange or direct current network system be connected.
The inductance for electric power system current limliting, compensation and neutral ground and the compound super conducting electric reactor of resistance that the present invention proposes, mainly comprise superconduction inductance coil, superconduction noninductive coil, cooled cryostat parts, low-temperature insulation sleeve pipe, superconduction binary current lead, superconduction transition wire and low-temperature refrigerant pipeline; Superconduction inductance coil and superconduction noninductive coil are all fully immersed in the low-temperature refrigerant in cooled cryostat parts; Low-temperature insulation sleeve pipe, superconduction binary current lead and low-temperature refrigerant pipeline are installed on the seal cover board of cooled cryostat parts; After superconduction inductance coil is connected with the series connection of superconduction noninductive coil by superconduction transition wire, then be connected with superconduction binary current lead, thereby form inductance and the compound super conducting electric reactor of resistance with fixed inductance value and variable resistance.The application characteristic that it has taken into account the fixed inductance value of single super conducting electric reactor and the variable resistance of single superconduction noninductive coil can possess electric power system current limliting and power back-off function and efficient neutral point grounding function simultaneously.
Preferably, described superconduction inductance coil and superconduction noninductive coil are by BSCCO, YBCO or MgB
2superconductivity wire coiling forms.
Preferably, described superconduction transition wire is by BSCCO, YBCO or MgB
2the superconduction long lead that superconductivity wire forms; The top of described superconduction binary current lead is the long lead being made up of copper or silver-colored wire, and bottom is by BSCCO, YBCO or MgB
2the superconduction long lead that superconductivity wire forms; Described superconduction binary current lead structure effectively reduces the heat of cooled cryostat parts and reveals, and has improved the operational efficiency of whole system.
Preferably, the bobbin of the bobbin of described superconduction inductance coil and superconduction noninductive coil is cirque structure or track type structure; The coil of described cirque structure skeleton coiling has good mechanical strength, and electromagnetic stress is evenly distributed, and has avoided the coil damage or the performance degradation problem that cause because local stress is excessive; Most inner leads of the coil of described track type structural framework coiling have the position relationship being parallel to each other, be more conducive to adjust the relative angle of most inner leads of superconduction noninductive coil and the central axis of superconduction inductance coil, the impact of the resistance sizes of the magnetic field that change superconduction inductance coil produces on superconduction noninductive coil.
Preferably, described superconduction inductance coil is the solenoid coil with rectangular cross section; A point chinaware can also be installed in the end of the described solenoid coil with rectangular cross section, to reduce the magnetic-field component on vertical superconductivity wire surface of end regions, and then increases the critical current of solenoid coil, reduces the operation energy loss of solenoid coil; Described point of chinaware is disk thin slice or the annulus thin slice being made up of high-permeability materials such as silicon steel sheet, silicon steel sheet, non-crystaline amorphous metals.
Preferably, described superconduction inductance coil is the solenoid coil with stairstepping cross section, the solenoid unit that the described solenoid with stairstepping cross section has different interior diameters, same external diameter by several overlaps, be positioned at the interior diameter maximum of the solenoid unit of solenoid end, and successively decrease to solenoid middle part successively; Compared with thering is the solenoid coil of rectangular cross section, the magnetic-field component on the vertical superconductivity wire surface of the described solenoidal end regions with stairstepping cross section is less, and then increase the critical current of solenoid coil, reduce the operation energy loss of solenoid coil.
Preferably, described superconduction noninductive coil is formed by the parallel coiling of two superconductivity wires, a wherein superconductivity wire forward coiling solenoid unit, the reverse coiling solenoid unit of another root superconductivity wire; The solenoid unit of described forward coiling is connected with the Same Name of Ends of the solenoid unit of reverse coiling; Wherein, the resistance of described noninductive coil is the resistance sum of the resistance of solenoid unit and the solenoid unit of reverse coiling of forward coiling.
Preferably, described superconduction noninductive coil is arranged on the outside of superconduction inductance coil, and utilize the impact that divides the resistance sizes of the chinaware shielding superconduction magnetic field that inductance coil produces on superconduction noninductive coil with disk flake structure, and then realize superconduction inductance coil and separate inductance and the compound super conducting electric reactor of resistance of superconduction noninductive coil.
Preferably, described superconduction noninductive coil is arranged on the centre position of the inner chamber of superconduction inductance coil, and the magnetic field that superconduction inductance coil produces is as the background magnetic field of superconduction inductance coil; Adjust the installation direction of superconduction noninductive coil, change the impact of magnetic field that superconduction inductance coil the produces resistance sizes on superconduction noninductive coil, and then realize superconduction noninductive coil and be subject to inductance and the compound super conducting electric reactor of resistance of the influence of magnetic field of superconduction inductance coil.
compared with prior art, the invention has the beneficial effects as follows:1. the present invention has taken into account the application characteristic of the fixed inductance value of single super conducting electric reactor and the variable resistance of single superconduction noninductive coil, possesses more efficient Power Systems compensation, current limliting and grounding function.
2. the present invention has adopted the line solenoid coil structures with stairstepping cross section, or point chinaware that changes end magnetic field direction is installed in the solenoid coil end with rectangular cross section, can effectively increase the critical current of super conducting electric reactor, and then improve the power of inputing or outputing that maximum in Power Systems compensation application allows, reduce the running wastage of super conducting electric reactor, promoted the operational efficiency of super conducting electric reactor.
3. the present invention utilizes the magnetic field of superconduction inductance coil generation as the background magnetic field of superconduction noninductive coil, in the time there is short trouble in electric power system, the quench that superconduction noninductive coil can be aggravated in the magnetic field that superconduction inductance coil produces, thereby obtain the resistance of the superconduction noninductive coil sharply increasing, final effectively restriction short-circuit current.
4. the invention solves the effective grounding in the transformer neutral point earthing reactor of conventional wires and meet the contradiction of current limliting high impedance between requiring.
brief description of the drawings:
Fig. 1 is the separate inductance of superconduction inductance coil and superconduction noninductive coil and the compound super conducting electric reactor structure chart of resistance;
Fig. 2 is the central axis of superconduction noninductive coil and the orthogonal inductance of central axis of superconduction inductance coil and the compound super conducting electric reactor structure chart of resistance;
Fig. 3 is inductance and the compound super conducting electric reactor structure chart of resistance that the central axis of superconduction noninductive coil and the central axis of superconduction inductance coil are parallel to each other;
Fig. 4 is the annular bobbin of superconduction inductance coil and superconduction noninductive coil and the schematic top plan view of coil;
Fig. 5 is the track type bobbin of superconduction inductance coil and superconduction noninductive coil and the schematic top plan view of coil;
Fig. 6 is the internal circuit catenation principle figure of superconduction inductance coil and superconduction noninductive coil.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail.But this should be interpreted as to the scope of the above-mentioned theme of the present invention only limits to following embodiment, all technology realizing based on content of the present invention all belong to scope of the present invention.
The invention provides a kind of inductance with fixed inductance value and variable resistance and compound super conducting electric reactor of resistance that has simultaneously possessed electric power system current limliting, compensation and neutral ground.The present invention has taken into account the application characteristic of the fixed inductance value of single super conducting electric reactor and the variable resistance of single superconduction noninductive coil, possesses more efficient Power Systems compensation, current limliting and grounding function.
As shown in Figure 1, the present invention proposes inductance and the compound super conducting electric reactor of resistance, comprise: superconduction inductance coil portion, comprise a superconduction inductance coil 1, the bobbin 2 of superconduction inductance coil 1, for upper backup pad 3, the lower supporting plate 4 of fixing superconduction inductance coil 1 are installed, described upper backup pad 3 is connected by screw connection 5 with lower supporting plate 4; Superconduction noninductive coil portion, comprises a superconduction noninductive coil 6, the bobbin 7 of superconduction noninductive coil 6, and for upper backup pad 8, the lower supporting plate 9 of fixing superconduction noninductive coil 6 are installed, described upper backup pad 8 is connected by screw connection 10 with lower supporting plate 9; Also comprise cooled cryostat parts 12, described cooled cryostat parts top is provided with seal cover board 13, described superconduction inductance coil portion and superconduction noninductive coil portion are all fully immersed in the low-temperature refrigerant in cooled cryostat parts 12, and after described superconduction inductance coil portion and superconduction noninductive coil portion are connected and fixed by screw connection 11, then be fixed on seal cover board 13 by another screw connection 14; The input duct 18 of low-temperature refrigerant is separately positioned on described seal cover board 13 with the fluid pipeline 19 of low-temperature refrigerant, and stretch to cooled cryostat parts 12 inside, be connected with the cryogenic refrigerating system that is positioned at cooled cryostat parts 12 outsides simultaneously, composition low-temperature refrigerant circularly cooling loop, for cooling superconduction inductance coil 1 and superconduction noninductive coil 6; Also comprise superconduction binary current lead parts 16, described superconduction binary current lead parts 16 are fixed in the low-temperature insulation sleeve pipe 15 on seal cover board 13, and its underpart is positioned at the inside of cooled cryostat parts 12, and top is connected with low-temperature insulation sleeve pipe 15; After described superconduction inductance coil 1 is connected with 6 series connection of superconduction noninductive coil by superconduction transition wire 17, be connected with the bottom of superconduction binary current lead 16 again, the top of superconduction binary current lead 16 also be positioned at cooled cryostat parts 12 outsides exchange or direct current network system be connected.
The inductance for electric power system current limliting, compensation and neutral ground and the compound super conducting electric reactor of resistance that the present invention proposes, mainly comprise superconduction inductance coil, superconduction noninductive coil, cooled cryostat parts, low-temperature insulation sleeve pipe, superconduction binary current lead, superconduction transition wire and low-temperature refrigerant pipeline; Superconduction inductance coil and superconduction noninductive coil are all fully immersed in the low-temperature refrigerant in cooled cryostat parts; Low-temperature insulation sleeve pipe, superconduction binary current lead and low-temperature refrigerant pipeline are all connected with the seal cover board of cooled cryostat parts; After superconduction inductance coil is connected with the series connection of superconduction noninductive coil by superconduction transition wire, then be connected with superconduction binary current lead, thereby form inductance and the compound super conducting electric reactor of resistance with fixed inductance value and variable resistance.The application characteristic that it has taken into account the fixed inductance value of single super conducting electric reactor and the variable resistance of single superconduction noninductive coil, possesses more efficient Power Systems compensation, current limliting and grounding function.
Concrete, described superconduction inductance coil 1 and superconduction noninductive coil 6 are by BSCCO, YBCO or MgB
2superconductivity wire coiling forms.Described superconduction transition wire 17 is by BSCCO, YBCO or MgB
2the superconduction long lead that superconductivity wire forms; The top of described superconduction binary current lead 16 is the long lead being made up of copper or silver-colored wire, and bottom is by BSCCO, YBCO or MgB
2the superconduction long lead that superconductivity wire forms; Described superconduction binary current lead structure effectively reduces the heat of cooled cryostat parts and reveals, and has improved the operational efficiency of whole system.
Preferably, the bobbin 2 of described superconduction inductance coil 1 and the bobbin 7 of superconduction noninductive coil 6 are cirque structure or track type structure; The coil of described cirque structure skeleton coiling has good mechanical strength, and electromagnetic stress is evenly distributed, and has avoided the coil damage or the performance degradation problem that cause because local stress is excessive; Most inner leads of the coil of described track type structural framework coiling have the position relationship being parallel to each other, be more conducive to adjust the relative angle of most inner leads of superconduction noninductive coil 6 and the central axis of superconduction inductance coil 1, the impact of the resistance sizes of the magnetic field that change superconduction inductance coil 1 produces on superconduction noninductive coil 6.
Preferably, described superconduction inductance coil 1 is for having the solenoid coil of rectangular cross section; Point chinaware 20 can also be installed in the end of the described solenoid coil with rectangular cross section, to reduce the magnetic-field component on vertical superconductivity wire surface of end regions, and then increases the critical current of solenoid coil, reduces the operation energy loss of solenoid coil; Described point of chinaware 20 is disk thin slice or the annulus thin slice being made up of high-permeability materials such as silicon steel sheet, silicon steel sheet, non-crystaline amorphous metals.
Preferably, described superconduction inductance coil 1 is for having the solenoid coil of stairstepping cross section, the solenoid unit that the described solenoid with stairstepping cross section has different interior diameters, same external diameter by several overlaps, be positioned at the interior diameter maximum of the solenoid unit of solenoid end, and successively decrease to solenoid middle part successively; Compared with thering is the solenoid coil of rectangular cross section, the magnetic-field component on the vertical superconductivity wire surface of the described solenoidal end regions with stairstepping cross section is less, and then increase the critical current of solenoid coil, reduce the operation energy loss of solenoid coil.
Preferably, described superconduction noninductive coil 6 is formed by the parallel coiling of two superconductivity wires, a wherein superconductivity wire forward coiling solenoid unit 21, the reverse coiling solenoid unit 22 of another root superconductivity wire; The solenoid unit 21 of described forward coiling is connected with the reverse Same Name of Ends of the solenoid unit 22 of coiling, to offset the magnetic field producing separately, and then realization to have inductance value be zero noninductive coil; Wherein, the resistance of described noninductive coil is the resistance sum of the resistance of solenoid unit 21 and the solenoid unit 22 of reverse coiling of forward coiling.
Preferably, described superconduction noninductive coil 6 is arranged on the outside of superconduction inductance coil 1, and utilize point chinaware 20 with disk flake structure to shield the impact of magnetic field that superconduction inductance coil 1 the produces resistance sizes on superconduction noninductive coil 6, and then realize superconduction inductance coil 1 and separate inductance and the compound super conducting electric reactor of resistance of superconduction noninductive coil 6.
Preferably, described superconduction noninductive coil 6 is arranged on the centre position of the inner chamber of superconduction inductance coil 1, and the magnetic field that superconduction inductance coil 1 produces is as the background magnetic field of superconduction inductance coil 1; Adjust the installation direction of superconduction noninductive coil (6), change the impact of magnetic field that superconduction inductance coil 1 the produces resistance sizes on superconduction noninductive coil 6, and then realize superconduction noninductive coil 6 and be subject to inductance and the compound super conducting electric reactor of resistance of the influence of magnetic field of superconduction inductance coil 1.
The noninductive coil of superconduction described in the present invention entirety can also be arranged on the centre position of the inner chamber of superconduction inductance coil entirety, and adjust the installation direction of superconduction noninductive coil (6), the impact of the magnetic field that change superconduction inductance coil produces on superconduction noninductive coil, and then realize superconduction inductance coil and the interactional inductance of superconduction noninductive coil and the compound super conducting electric reactor of resistance; After the binding post of the binding post of superconduction inductance coil and superconduction noninductive coil is connected in series, be connected with the bottom of superconduction binary current lead by superconduction transition wire again, and then composition has inductance and the compound super conducting electric reactor of resistance of fixed inductance value and variable resistance.Further illustrate again the present invention below.
As shown in Fig. 1, Fig. 4, Fig. 6, in the embodiment of the present invention 1, for the reactive power compensation in high-voltage AC transmission system and the application of transmission line short-circuit fault current limliting, utilize the separate inductance of superconduction inductance coil of the present invention and superconduction noninductive coil and the compound super conducting electric reactor of resistance to carry out effective compensation to the real-time reactive power in high-voltage AC transmission system normal course of operation, the short-circuit current in high-voltage AC transmission system failure running is effectively limited simultaneously.System comprises superconduction inductance coil, the bobbin of superconduction inductance coil, the upper backup pad of superconduction inductance coil, the lower supporting plate of superconduction inductance coil, screw connection between upper backup pad and lower supporting plate, superconduction noninductive coil, the bobbin of superconduction noninductive coil, the upper backup pad of superconduction noninductive coil, the lower supporting plate of superconduction noninductive coil, screw connection between upper backup pad and lower supporting plate, screw connection between the upper backup pad of the upper backup pad of superconduction noninductive coil or lower supporting plate and superconduction inductance coil, cooled cryostat parts, the cover plate of cooled cryostat parts, between cover plate and upper backup pad, screw rod is connected, low-temperature insulation sleeve pipe, superconduction binary current lead, superconduction transition wire between the binding post of superconduction inductance coil and superconduction noninductive coil and superconduction binary current lead, the input duct of low-temperature refrigerant, the fluid pipeline of low-temperature refrigerant, and point chinaware.
Described superconduction inductance coil and superconduction noninductive coil form by the coiling of BSCCO superconductivity wire.Described superconduction transition wire is the superconduction long lead being made up of BSCCO superconductivity wire.The top of described superconduction binary current lead is the long lead being made up of copper conductor, and bottom is the superconduction long lead being made up of BSCCO superconductivity wire; Described low-temperature refrigerant is low temperature liquid nitrogen.The bobbin of described superconduction noninductive coil and superconduction inductance coil is cirque structure.Described superconduction inductance coil is the solenoid coil with rectangular cross section.Described point of chinaware is the disk thin slice being made up of silicon steel material, is arranged on the upper and lower end position of solenoid coil.Be subject to the anisotropic impact of superconductivity wire, the vertical magnetic field component on the vertical wires surface of formed objects is more serious to the critical current decay of superconduction inductance coil than the parallel magnetic field component on parallel wire surface.On the one hand, point chinaware can change the direction of end magnetic field, increases parallel magnetic field component and reduces vertical magnetic field component, finally improves the critical current of superconduction inductance coil.Like this, the compound super conducting electric reactor of inductance and resistance just can provide very high reactive power compensation, to meet the normal operating reactive power compensation demand of high-voltage AC transmission system; Meanwhile, can also ensure that the actual motion electric current of superconduction inductance coil is lower than its critical current, can keep the approximate zero resistance of superconduction inductance coil, the superconducting characteristic of approximate zero energy loss, finally improve the operational efficiency of inductance and the compound super conducting electric reactor of resistance.On the other hand, point chinaware can also shield the impact of magnetic field that superconduction inductance coil the produces resistance sizes on superconduction noninductive coil, and then realizes superconduction inductance coil and separate inductance and the compound super conducting electric reactor of resistance of superconduction noninductive coil.
The inductance value of superconduction inductance coil is
l 3, resistance value is
r 3.The inductance value of the solenoid unit of the forward coiling in superconduction noninductive coil is
l 1, resistance value is
r 1.The inductance value of the solenoid unit of the reverse coiling in superconduction noninductive coil is
l 2, resistance value is
r 2.Because the solenoid unit of forward coiling is formed by two superconductivity wire coilings that walk abreast with the solenoid unit of oppositely coiling, the inductance value of two solenoid units and resistance value are completely equal,
l 1=
l 2,
r 1=
r 2.The Same Name of Ends of two solenoid units is connected, and has realized that to have inductance value be zero noninductive coil.The resistance value of superconduction noninductive coil is the resistance value sum of two solenoid units, 2
r 1or 2
r 2.
In the normal course of operation of high-voltage AC transmission system, the actual motion electric current of superconduction inductance coil and superconduction noninductive coil is all lower than its critical current, both resistance sums are approximately zero, and the compound super conducting electric reactor of whole inductance and resistance externally shows as an inductance value and is
l 3superconduction inductance coil.In the failure operation process of high-voltage AC transmission system, the actual motion electric current of superconduction inductance coil is lower than its critical current, resistance value
r 3be approximately zero, but the actual motion electric current of superconduction noninductive coil is higher than its critical current, the resistance value sum 2 of two solenoid units
r 1or 2
r 2sharply increase, the compound super conducting electric reactor of whole inductance and resistance externally shows as an inductance value and is
l 3, resistance value is 2
r 1or 2
r 2superconduction inductance coil.
As shown in Fig. 2, Fig. 4, Fig. 5, Fig. 6, in the embodiment of the present invention 2, for the three-phase transformer short trouble current limliting application in high-voltage AC transmission system, utilize the central axis of superconduction noninductive coil of the present invention and the orthogonal inductance of central axis of superconduction inductance coil and the compound super conducting electric reactor of resistance effectively to limit the short-circuit current in the three-phase transformer short trouble running of high-voltage AC transmission system.
Only be with the difference of embodiment 1: described superconduction inductance coil and superconduction noninductive coil form by the coiling of YBCO superconductivity wire.Described superconduction transition wire is the superconduction long lead being made up of YBCO superconductivity wire.The top of described superconduction binary current lead is the long lead being made up of copper conductor, and bottom is the superconduction long lead being made up of YBCO superconductivity wire.Described low-temperature refrigerant is low temperature liquid nitrogen.The bobbin of described superconduction noninductive coil is track type structure, and the bobbin of superconduction inductance coil is cirque structure.Described point of chinaware is the annulus thin slice being made up of silicon steel sheet material, is arranged on the upper and lower end position of solenoid coil.Described superconduction noninductive coil is arranged on the centre position of the inner chamber of superconduction inductance coil, and the magnetic field that superconduction inductance coil produces is as the background magnetic field of superconduction noninductive coil.The central axis of superconduction noninductive coil is mutually vertical with the central axis of superconduction inductance coil.Because superconduction noninductive coil is track type structure, most background magnetic fields of superconduction noninductive coil are the vertical magnetic field component on vertical wires surface, and corresponding parallel magnetic field component is zero.Like this, in the time that high-voltage AC transmission system occurs that three-phase transformer is short-circuited fault, the quench that superconduction noninductive coil can be farthest aggravated in the magnetic field that superconduction inductance coil produces, thus obtain the sharply resistance value 2 of the superconduction noninductive coil of increase
r 1or 2
r 2, the short-circuit current in final effectively restriction three-phase transformer short trouble running.
As shown in Fig. 2, Fig. 5, Fig. 6.In the embodiment of the present invention 3, for the transformer neutral point ground connection application in high-voltage AC transmission system, utilize the central axis of superconduction noninductive coil of the present invention and the orthogonal inductance of central axis of superconduction inductance coil and the compound super conducting electric reactor of resistance to carry out effective grounding to the transformer neutral point of high-voltage AC transmission system, HVDC (High Voltage Direct Current) transmission system is occurred to the transformer neutral point earth fault current in single-phase grounding fault running effectively limits simultaneously.
Only be with the difference of embodiment 1: described superconduction inductance coil is formed by the coiling of YBCO superconductivity wire.Described superconduction noninductive coil is formed by the coiling of BSCCO superconductivity wire.Described superconduction transition wire is the superconduction long lead being made up of YBCO superconductivity wire.The top of the described superconduction binary current lead long lead that silver-colored wire forms of serving as reasons, bottom is the superconduction long lead being made up of YBCO superconductivity wire.Described low-temperature refrigerant is low temperature liquid hydrogen.The bobbin of described superconduction noninductive coil and superconduction inductance coil is track type structure.Described point of chinaware is the annulus thin slice being made up of amorphous alloy material, is arranged on the upper and lower end position of solenoid coil.Described superconduction noninductive coil is arranged on the centre position of the inner chamber of superconduction inductance coil, and the magnetic field that superconduction inductance coil produces is as the background magnetic field of superconduction noninductive coil.The central axis of superconduction noninductive coil is mutually vertical with the central axis of superconduction inductance coil.Because superconduction noninductive coil is track type structure, most background magnetic fields of superconduction noninductive coil are the vertical magnetic field component on vertical wires surface, and corresponding parallel magnetic field component is zero.Like this, in the time that single-phase grounding fault appears in high-voltage AC transmission system, the quench that superconduction noninductive coil can be farthest aggravated in the magnetic field that superconduction inductance coil produces, obtains the sharply resistance value 2 of the superconduction noninductive coil of increase
r 1or 2
r 2, final effectively limiting transformer neutral ground fault current.In the time that high-voltage AC transmission system is normally moved, superconduction noninductive coil is all the time in superconducting state, its resistance value 2
r 1or 2
r 2be approximately zero, negligible.Like this, transformer neutral point will be realized effective grounding by superconduction inductance coil, the running wastage of simultaneously having avoided the internal resistance of traditional neutral point earthing reactor to bring.In sum, the compound super conducting electric reactor of inductance and resistance can effectively solve the effective grounding in the transformer neutral point earthing reactor of conventional wires and meet the contradiction of current limliting high impedance between requiring.
As shown in Fig. 3, Fig. 4, Fig. 6.In the embodiment of the present invention 4, for the voltage fluctuation compensation in HVDC (High Voltage Direct Current) transmission system and the application of transmission line short-circuit fault current limliting, utilize inductance and the compound super conducting electric reactor of resistance that the central axis of superconduction noninductive coil of the present invention and the central axis of superconduction inductance coil are parallel to each other to carry out effective compensation to the real-time voltage fluctuation in HVDC (High Voltage Direct Current) transmission system normal course of operation, the short-circuit current in HVDC (High Voltage Direct Current) transmission system failure operation process is effectively limited simultaneously.
Only be with the difference of embodiment 1: described superconduction inductance coil and superconduction noninductive coil are by MgB
2superconductivity wire coiling forms.Described superconduction transition wire is by MgB
2the superconduction long lead that superconductivity wire forms.The top of the described superconduction binary current lead long lead that silver-colored wire forms of serving as reasons, bottom is the superconduction long lead being made up of YBCO superconductivity wire; Described low-temperature refrigerant is low-temperature liquid helium.The bobbin of described superconduction noninductive coil and superconduction inductance coil is cirque structure.Described superconduction inductance coil is the solenoid coil with stairstepping cross section.The central axis of the central axis of described superconduction noninductive coil and superconduction inductance coil is parallel to each other.Because superconduction noninductive coil is cirque structure, most background magnetic fields of superconduction noninductive coil are the parallel magnetic field component on parallel wire surface, and corresponding vertical magnetic field component is zero.Like this, in the time there is the short trouble of transmission line in HVDC (High Voltage Direct Current) transmission system, the quench that superconduction noninductive coil can be minimally aggravated in the magnetic field that superconduction inductance coil produces, thus obtain the slowly resistance value 2 of the superconduction noninductive coil of increase
r 1or 2
r 2, limit gradually the short-circuit current in transmission line short-circuit fault running.
Tool of the present invention has the following advantages: the present invention has taken into account the application characteristic of the fixed inductance value of single super conducting electric reactor and the variable resistance of single superconduction noninductive coil, can possess electric power system current limliting and power back-off function and efficient neutral point grounding function simultaneously.
Simultaneously, the present invention has adopted the line solenoid coil structures with stairstepping cross section, or point chinaware that changes end magnetic field direction is installed in the solenoid coil end with rectangular cross section, effectively increase the critical current of super conducting electric reactor, and then improve the power of inputing or outputing that maximum in electric power system compensation application allows, reduce the running wastage of super conducting electric reactor, promoted the operational efficiency of super conducting electric reactor.
In addition, the present invention utilizes the magnetic field of superconduction inductance coil generation as the background magnetic field of superconduction inductance coil, in the time there is short trouble in electric power system, the quench that superconduction noninductive coil can be aggravated in the magnetic field that superconduction inductance coil produces, thereby obtain the resistance value of the superconduction noninductive coil sharply increasing, final effectively restriction short-circuit current.
By reference to the accompanying drawings the specific embodiment of the present invention is had been described in detail above, but the present invention is not restricted to above-mentioned execution mode, in the spirit and scope situation of claim that does not depart from the application, those skilled in the art can make various amendments or remodeling.
Claims (9)
1. the compound super conducting electric reactor of inductance and resistance, is characterized in that: comprising:
Superconduction inductance coil portion, comprise a superconduction inductance coil (1), the bobbin (2) of superconduction inductance coil (1), the upper backup pad (3), the lower supporting plate (4) that are used for installing fixing superconduction inductance coil (1), described upper backup pad (3) is connected by screw connection (5) with lower supporting plate (4);
Superconduction noninductive coil portion, comprise a superconduction noninductive coil (6), the bobbin (7) of superconduction noninductive coil (6), the upper backup pad (8), the lower supporting plate (9) that are used for installing fixing superconduction noninductive coil (6), described upper backup pad (8) is connected by screw connection (10) with lower supporting plate (9);
Also comprise cooled cryostat parts (12), described cooled cryostat parts top is provided with seal cover board (13), described superconduction inductance coil portion and superconduction noninductive coil portion are all fully immersed in the low-temperature refrigerant in cooled cryostat parts (12), and after described superconduction inductance coil portion and superconduction noninductive coil portion are connected and fixed by screw connection (11), then be fixed on seal cover board by another screw connection (14); The input duct (18) of low-temperature refrigerant is separately positioned on described seal cover board (13) with the fluid pipeline (19) of low-temperature refrigerant, and stretch to cooled cryostat parts (12) inside, the cryogenic refrigerating system outside with being positioned at cooled cryostat parts (12) is connected simultaneously, composition low-temperature refrigerant circularly cooling loop, for cooling superconduction inductance coil (1) and superconduction noninductive coil (6);
Also comprise superconduction binary current lead parts (16), described superconduction binary current lead parts (16) are fixed in the low-temperature insulation sleeve pipe (15) on seal cover board (13), its underpart is positioned at the inside of cooled cryostat parts (12), and top is connected with low-temperature insulation sleeve pipe (15); After described superconduction inductance coil (1) is connected with superconduction noninductive coil (6) series connection by superconduction transition wire (17), be connected with the bottom of superconduction binary current lead (16) again, the top of superconduction binary current lead (16) also be positioned at cooled cryostat parts (12) outside exchange or direct current network system is connected.
2. the compound super conducting electric reactor of inductance according to claim 1 and resistance, is characterized in that: described superconduction inductance coil (1) and superconduction noninductive coil (6) are by BSCCO, YBCO or MgB
2superconductivity wire coiling forms.
3. the compound super conducting electric reactor of inductance according to claim 1 and resistance, is characterized in that: described superconduction transition wire (17) is by BSCCO, YBCO or MgB
2the superconduction long lead that superconductivity wire forms; The top of described superconduction binary current lead (16) is the long lead being made up of copper or silver-colored wire, and bottom is by BSCCO, YBCO or MgB
2the superconduction long lead that superconductivity wire forms.
4. the compound super conducting electric reactor of inductance according to claim 1 and resistance, is characterized in that: the bobbin (2) of described superconduction inductance coil (1) and the bobbin (7) of superconduction noninductive coil (6) are cirque structure or track type structure.
5. the compound super conducting electric reactor of inductance according to claim 1 and resistance, is characterized in that: described superconduction inductance coil (1) is the solenoid coil with stairstepping cross section, or for thering is the solenoid coil of rectangular cross section.
6. the compound super conducting electric reactor of inductance according to claim 5 and resistance, it is characterized in that: described in there is the solenoid unit that the solenoid of stairstepping cross section has different interior diameters, same external diameter by several and overlap, be positioned at the interior diameter maximum of the solenoid unit of solenoid end, and successively decrease to solenoid middle part successively; The solenoid unit that the described solenoid coil with rectangular cross section has identical interior diameter, same external diameter by several overlaps; A point chinaware (20) can also be installed in the end of the described solenoid coil with rectangular cross section, to reduce the magnetic-field component on vertical superconductivity wire surface of end regions, and then increase the critical current of solenoid coil, reduce the operation energy loss of solenoid coil; Disk thin slice or the annulus thin slice of described point of chinaware (20) for being formed by high-permeability materials such as silicon steel sheet, silicon steel sheet, non-crystaline amorphous metals.
7. according to the inductance described in claim 1 to 6 any one and the compound super conducting electric reactor of resistance, it is characterized in that: described superconduction noninductive coil (6) is formed by the parallel coiling of two superconductivity wires, a wherein superconductivity wire forward coiling solenoid unit (21), the reverse coiling solenoid unit of another root superconductivity wire (22); The solenoid unit (21) of described forward coiling is connected with the Same Name of Ends of the solenoid unit (22) of reverse coiling; Wherein, the resistance of described noninductive coil is the resistance sum of the resistance of solenoid unit (21) and the solenoid unit (22) of reverse coiling of forward coiling.
8. according to the inductance described in claim 1 to 7 any one and the compound super conducting electric reactor of resistance, it is characterized in that: described superconduction noninductive coil (6) is arranged on the outside of superconduction inductance coil (1), and utilize the impact of magnetic field that point chinaware (20) the shielding superconduction inductance coil (1) with disk flake structure the produces resistance sizes on superconduction noninductive coil (6), and then realize superconduction inductance coil (1) and separate inductance and the compound super conducting electric reactor of resistance of superconduction noninductive coil (6).
9. according to the inductance described in claim 1 to 7 any one and the compound super conducting electric reactor of resistance, it is characterized in that: described superconduction noninductive coil (6) is arranged on the centre position of the inner chamber of superconduction inductance coil (1), the magnetic field that superconduction inductance coil (1) produces is as the background magnetic field of superconduction inductance coil (1); Adjust the installation direction of superconduction noninductive coil (6), change the impact of the resistance sizes of magnetic field on superconduction noninductive coil (6) that superconduction inductance coil (1) produces, and then realize superconduction noninductive coil (6) and be subject to inductance and the compound super conducting electric reactor of resistance of the influence of magnetic field of superconduction inductance coil (1).
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