CN103296636B - A kind of HVDC gas-break switch based on self-maintained circuit - Google Patents
A kind of HVDC gas-break switch based on self-maintained circuit Download PDFInfo
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- CN103296636B CN103296636B CN201310199627.XA CN201310199627A CN103296636B CN 103296636 B CN103296636 B CN 103296636B CN 201310199627 A CN201310199627 A CN 201310199627A CN 103296636 B CN103296636 B CN 103296636B
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Abstract
The invention discloses a kind of HVDC gas-break switch based on self-maintained circuit, it is possible under higher grade of rated voltage, cut-off fault current；Including the superconductive current limiter being in series and cut-off module, described in cut-off converter circuit and the nonlinear resistance zinc oxide energy absorption device that gas-break switch, electric capacity and the inductance that module includes being in parallel is composed in series；Fault current first passes through superconductive current limiter to carry out current limliting and is cut-off by gas-break switch, thus reaches to cut-off the purpose of fault current, and gas-break switch utilizes the mode of self-excitation to produce artificial zero crossing to carry out blow-out；The present invention has that response speed is fast, current overload coefficient is low, simple in construction, volume are little, overvoltage is low, safe and reliable, make the short-circuit current value of circuit quench current value not over superconductive current limiter, the advantage of miscellaneous equipment can be protected.
Description
Technical field
The present invention relates to breaker technical field, be specifically related to a kind of HVDC gas based on self-maintained circuit and break
Road device.
Background technology
Owing to current high voltage DC breaker technology is not mature enough, limits the development of MTDC transmission system, become multiterminal
HVDC Transmission Technology development and the bottleneck of application.And for the new flexible direct current power transmission system risen, although there being power electronics skill
Art can direct control and protection system, but as last protected location, dc circuit breaker is also requisite.
The principle of at present conventional high voltage DC breaker has a self-excited oscillating type, external excited oscillation type and utilize current limiting device first
Current limliting cut-offs type again.Utilizing current limiter elder generation current limliting to cut-off is current popular research direction again, this also with current current limiting technique
Fast development is undivided.Why current limiting technique receives publicity, and mainly has a following two reason: first, and net capacity is not
Disconnected increase, short circuit current level is consequently increased, and limiting short-circuit current can improve the security and stability of power system, electrical network supplies
Electricity quality and the operational flexibility of electrical network；Second, existing power device overload capacity is low, and di/dt, the du/ that can bear
Dt is limited, causes power device and punctures or damage, need to use demand limiter during for preventing fault.The present invention uses superconduction to limit
The mode that stream device is connected with the hydrogen chopper of self-excitation type constitutes gases at high pressure chopper.
Summary of the invention
In order to solve the problem that above-mentioned prior art exists, it is an object of the invention to provide a kind of based on self-oscillation electricity
The HVDC gas-break switch on road, it is possible to be used in high voltage occasion, has the energy cut-offfing major break down electric current and rated current
Power, and cut-off circuit when utilizing current over-zero.
For reaching object above, the present invention adopts the following technical scheme that
A kind of HVDC gas-break switch based on self-maintained circuit, including the superconductive current limiter 1 being in series with open
Disconnected module, described in cut-off converter circuit that gas-break switch 2, electric capacity 3 and the inductance 4 that module includes being in parallel be composed in series and
Nonlinear resistance zinc oxide energy absorption device 5.
Described gas-break switch 2 is hydrogen chopper, and gas therein is the mixing of pure hydrogen or hydrogen and other gas
Gas, if mixed gas, hydrogen and other gas are with any ratio mixing.
Described superconductive current limiter 1 is high-temperature electric resistance type superconductive current limiter, its material use yttrium barium copper oxide YBCO or its
Its superconductor.
Described superconductive current limiter 1 is that multiple superconductive current limiter uses series connection and/or the structure of parallel connection, described in cut-off module and be
Multiple modules of cut-offfing use series connection and/or the structure of parallel connection.
Described each gas-break switch 2 is parallel with equalizing resistance 6.
Increase the mode in magnetic field to described gas-break switch 2, improve its connecting-disconnecting function.
The mode in described increase magnetic field is in the outer increase magnetic field of gas-break switch 2 or to open on the contact of gas-break switch 2
Groove.
Compared to the prior art the present invention, has the advantage that
1, the present invention uses gas-break switch, because the big connecting-disconnecting function of the electric current of gas-break switch is strong, that can bear is specified
Voltage is high；Owing to DC current makes electric arc in fracture be difficult to extinguish without natural zero-crossing point, when the rated voltage of circuit is higher than hydrogen
During the arc voltage of electric arc, electric arc can not extinguish so utilizing the method creating artificial zero crossing to make DC current be reduced to zero and making
Arc extinction.Because hydrogen electric arc has the characteristic of negative resistance, it is possible to utilize negative resistance property and the shakiness of hydrogen electric arc
Qualitative, in the electric capacity in parallel with cut-offfing arc gap and inductance series loop, produce incremental self-oscillation, make in arc gap
Breaking direct current on the oscillatory flow of superposition amplification, cut-off circuit when utilizing current over-zero；
2, superconductive current limiter of the present invention is high-temperature electric resistance type superconductive current limiter, and resistive superconducting current limiter has structure letter
Single, response speed is fast, the feature that current overload coefficient is low；Material uses yttrium barium copper oxide YBCO, because its resistance is when quenching
Very big, can be by fault current limitation in the lowest level；Gas-break switch 2 of the present invention is hydrogen chopper, and hydrogen is as one
Arc extinguishing gases, using the teaching of the invention it is possible to provide high arc voltage, during arc extinction, time constant is little, and hydrogen breaker apparatus volume is little, stable
Property high；When the mixed gas that the gas in hydrogen chopper is hydrogen and other gas, mixed gas can improve the steady of gas
Qualitative or improve gas insulating capacity；
3, superconductive current limiter 1 is that multiple superconductive current limiter uses series connection and/or the structure of parallel connection, and cut-offfing module is multiple opening
Disconnected module uses series connection and/or the structure of parallel connection；When superconductive current limiter and the form cut-offfing the module multiple series connection of employing, it is possible to carry
The rated voltage of high HVDC gas-break switch of the present invention；When superconductive current limiter and the shape cut-offfing the module multiple parallel connections of employing
Formula, it is possible to increase the rated current of HVDC gas-break switch of the present invention；
4, on each gas-break switch, it is parallel with equalizing resistance, makes each gas-break switch bear identical specified electricity
Pressure, plays the purpose all pressed.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Fig. 2 be the first improve cut-off module diagram.
Fig. 3 be the second improve cut-off module diagram.
Fig. 4 be the third improve cut-off module diagram.
Detailed description of the invention
Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
As it is shown in figure 1, a kind of HVDC gas-break switch based on self-maintained circuit of the present invention, including be in series
Superconductive current limiter 1 and cut-off module, described in cut-off module include being in parallel gas-break switch 2, electric capacity 3 and inductance 4 and be composed in series
Converter circuit and nonlinear resistance zinc oxide energy absorption device 5.
As the preferred embodiments of the present invention, described gas-break switch 2 is hydrogen chopper, and gas therein is pure hydrogen
Or the mixed gas of hydrogen and other gas, such as hydrogen and the mixed gas of nitrogen.Described superconductive current limiter 1 is high-temperature electric resistance type
Superconductive current limiter, its material uses yttrium barium copper oxide YBCO.Superconduction is improved by the method adding magnetic field to superconducting tape
Critical electric current value, be greatly improved the ability of drop-out current, make to cut-off rapider.
As the preferred embodiments of the present invention, if the afforded load voltage value of gas-break switch does not reaches system
Requirement, in order to improve the rated voltage of HVDC gas-break switch of the present invention, can use multiple shape cut-offfing block coupled in series
Formula, superconductive current limiter can also use the form of multiple series connection.If the afforded load current value of gas-break switch reaches not
To the requirement of system, in order to improve the rated current of HVDC gas-break switch of the present invention, can use and multiple cut-off module
Form in parallel, superconductive current limiter can also use the form of multiple parallel connection.As in figure 2 it is shown, for multiple wired in parallel of cut-offfing
Structure, improves the rated current of HVDC gas-break switch of the present invention.As it is shown on figure 3, cut-off after module first connects for multiple
Structure in parallel again, reduces the Annual distribution cut-offfing module.As shown in Figure 4, for multiple structures cut-offfing block coupled in series, adopt
By the structure of Fig. 3 and Fig. 4, it is possible to reduce inductance and the quantity of electric capacity in circuit, two inductance can use another big inductance
Series connection, two electric capacity can replace with another electric capacity, thus reduce in volume and circuit due to the minimizing of inductance quantity, also can
Reduce coupling inductance impact, make the switch off time cut-offfing module closer to.
As further preferred embodiment of the present invention, in Fig. 2-Fig. 4, it is parallel with equal piezoelectricity on each gas-break switch 2
Resistance 6, makes each gas-break switch 2 bear identical rated voltage, plays the purpose all pressed.
As the preferred embodiments of the present invention, in order to improve the connecting-disconnecting function of gas-break switch, can be by breaking to gas
Road device 2 increases the mode in magnetic field, such as externally-applied magnetic field or produce magnetic field, magnetic by the way of to gas-break switch contact fluting
The current value that can cut-off with elongating arc, thus can be improved in field, improves the arc extinguishing ability of gas-break switch 2.
The operation principle of the present invention is: fault current limitation first can be cut-off by superconductive current limiter 1 at gas-break switch
Under current value, more directly DC current is extinguished by gas-break switch；The converter circuit that electric capacity 3 and inductance 4 are composed in series is in parallel
On gas-break switch, after gas-break switch contact separates, arc voltage charge to electric capacity 3.Instability due to electric arc
Property, arc voltage produces fluctuation, makes the process having a discharge and recharge between capacitor 3 and electric arc, produces charging and discharging currents, electric arc
Negative resistance charactertistic make the vibration of this electric current be continuously increased, when the amplitude of electric current is equal to cut-off electric current, in gas open circuit
Current zero-crossing point is produced between device contact.After arc current zero passage, start the medium recovery stage between gas-break switch contact, this
Time straight-flow system still store huge energy, the recovery voltage that this portion of energy will become on capacitor 3, only when gas break
Road utensil has medium recovery speed to be faster just unlikely to phenomenon of restriking.Non-linear electricity in parallel is risen to when recovering voltage
When hindering the rated voltage of zinc oxide energy absorption device 5, energy absorption device turns on, and sponges this portion of energy, makes system power drop to
Zero, so far complete a direct current interrupting process.
The present invention uses superconductive current limiter current limliting to be because superconductive current limiter and can run under high voltages, and can realize inspection
Survey, conversion, current limliting integration, can in Millisecond fault current limiting.The startup of superconductive current limiter metering function does not relies on
Other control circuit, the increase of line current is exactly the command signal that superconductor quenches.
Claims (5)
1. a HVDC gas-break switch based on self-maintained circuit, it is characterised in that: include the superconduction limit being in series
Stream device (1) and multiple module of cut-offfing, described superconductive current limiter (1) is high-temperature electric resistance type superconductive current limiter, described superconductive current limiter
Superconductor use yttrium barium copper oxide YBCO；Described cut-off gas-break switch (2), the electric capacity (3) that module includes being in parallel
The converter circuit being composed in series with inductance (4) and nonlinear resistance zinc oxide energy absorption device (5)；Described gas-break switch (2)
For hydrogen chopper, gas therein is pure hydrogen or hydrogen and the mixed gas of other gas, if mixed gas, hydrogen and
Other gas mixes with arbitrary proportion；The described converter circuit cut-off in module and nonlinear resistance zinc oxide energy absorption device (5)
The mode of connection, use structure directly the most in parallel with gas-break switch (2), or each cut-off the converter circuit in module and non-
Linear resistance zinc oxide energy absorption device (5) all first self connects two or more, then with gas-break switch (2) in parallel connecing
Line structure.
A kind of HVDC gas-break switch based on self-maintained circuit the most according to claim 1, it is characterised in that:
Described superconductive current limiter (1) is multiple, use series connection and/or the structure of parallel connection, the plurality of cut-off module use series connection and/or
Structure in parallel.
A kind of HVDC gas-break switch based on self-maintained circuit the most according to claim 1, it is characterised in that:
Each described gas-break switch (2) is parallel with equalizing resistance (6).
A kind of HVDC gas-break switch based on self-maintained circuit the most according to claim 1, it is characterised in that:
Increase the mode in magnetic field to described gas-break switch (2), improve its connecting-disconnecting function.
A kind of HVDC gas-break switch based on self-maintained circuit the most according to claim 4, it is characterised in that:
The mode in described increase magnetic field is to increase outward magnetic field at gas-break switch (2) or slot on the contact of gas-break switch (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310199627.XA CN103296636B (en) | 2013-05-24 | 2013-05-24 | A kind of HVDC gas-break switch based on self-maintained circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310199627.XA CN103296636B (en) | 2013-05-24 | 2013-05-24 | A kind of HVDC gas-break switch based on self-maintained circuit |
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| CN103296636A CN103296636A (en) | 2013-09-11 |
| CN103296636B true CN103296636B (en) | 2016-12-28 |
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| CN201310199627.XA Expired - Fee Related CN103296636B (en) | 2013-05-24 | 2013-05-24 | A kind of HVDC gas-break switch based on self-maintained circuit |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103762547A (en) * | 2014-01-08 | 2014-04-30 | 西安交通大学 | Modular high-voltage vacuum direct current on-off device based on artificial zero crossing |
| CN103928913B (en) * | 2014-03-31 | 2016-05-25 | 华中科技大学 | A kind of high voltage DC breaker based on rapid repulsion mechanism and insulating transformer |
| CN105811381B (en) * | 2016-03-17 | 2018-02-02 | 中国科学院电工研究所 | A kind of direct current current-limiting circuit breaker |
| CN106486965A (en) * | 2016-11-03 | 2017-03-08 | 中国电力科学研究院 | A kind of dc circuit breaker of self-excited oscillation type and its control method |
| WO2020038587A1 (en) * | 2018-08-24 | 2020-02-27 | Siemens Aktiengesellschaft | Arrangement comprising high-voltage switches |
| FR3091408B1 (en) * | 2018-12-27 | 2021-01-15 | Inst Supergrid | High voltage direct current cut-off device with adaptive oscillation circuit and control method |
| FR3091407B1 (en) | 2018-12-27 | 2021-10-29 | Inst Supergrid | High voltage direct current cut-off device with capacitive buffer circuit and control method |
| FR3094136B1 (en) | 2019-03-22 | 2021-04-02 | Inst Supergrid | High voltage direct current cut-off device with resonator and commutation |
| CN110190589A (en) * | 2019-04-25 | 2019-08-30 | 国家电网有限公司 | A kind of mode of resonance mixed style direct current switch |
| FR3113334B1 (en) | 2020-08-05 | 2024-07-19 | Inst Supergrid | Power cutting device for electric current under high direct voltage, installation with such a device, control method, and process for evaluating the integrity of an electrical conductor |
| CN113612192B (en) * | 2021-07-19 | 2022-05-06 | 西安交通大学 | Self-adaptive vacuum forced zero-crossing direct current switching-on and switching-off method based on superconducting current limiting |
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