CN202190072U - High-reliability controllable multiple spark discharge gap - Google Patents
High-reliability controllable multiple spark discharge gap Download PDFInfo
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- CN202190072U CN202190072U CN2011202000296U CN201120200029U CN202190072U CN 202190072 U CN202190072 U CN 202190072U CN 2011202000296 U CN2011202000296 U CN 2011202000296U CN 201120200029 U CN201120200029 U CN 201120200029U CN 202190072 U CN202190072 U CN 202190072U
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Abstract
The utility model belongs to the field of electrical elements, and particularly relates to a high-reliability controllable multiple spark discharge gap, which is used for over-voltage protection and heavy-current high-speed bypass of key devices or components of an ultra-high voltage alternating/direct current electric power system. The high-reliability controllable multiple spark discharge gap comprises a power-frequency power supply, a current limiting inductor L0, a trigger pulse generator, a coupling capacitor C0, a multiple-discharge gap unit, resistors R1, R2...and Rn and capacitors C1, C2...and Cn, wherein a gap G1, a gap G2...and a gap Gn are connected in series to form the multiple discharge gap unit, the resistors R1, R2...and Rn are connected in parallel, and the capacitors C1, C2...and Cn are connected in parallel. Power frequency alternating (direct) current working voltage is capable of being distributed uniformly along the multiple gaps by selecting suitable network structures and parameters. In addition, the controllable discharge gap can be applied to alternating-current or direct-current power transmission systems at any voltage levels and even at the ultra-high voltage level.
Description
Technical field
The utility model belongs to the electric component field, is specifically related to the controlled multiple spark-discharge gap of a kind of high reliability, can be used for the overvoltage protection of extra-high pressure AC/DC electric power system visual plant or parts and the high speed bypass of big electric current.
Background technology
Because the time compole short (microsecond magnitude) of sparkover, the above impulse current of hundreds of kA can be born in the gap, and controlled spark-discharge gap (or claiming to trigger discharging gap) has been applied to the experimental study in fields such as high voltage technique, Pulse Power Techniques.
The design in existing controlled discharge gap all based on so-called " three electrode gaps " principle, is promptly placed the 3rd electrode that is used for " igniting " between the main gap that two electrodes constitute.The electrode shape design of main gap makes the electric field in gap even as far as possible, so that make the gap can tolerate higher operating voltage, avoids gap generation self discharge (triggering, malfunction certainly) under the operating voltage effect; When trigger impulse is sent to ignitor, in main gap, produce electric field distortion or sparklet discharge, cause main gap insulation tolerance intensity to reduce, make the gap under the operating voltage effect, produce the penetrability discharge.Also can realize the igniting in controlled discharge gap with laser pulse.
Existing three electrode controlled discharge gaps still can not have in the main cause of high-voltage fence practical applications:
1) reliability is low: owing to receive meteorological environmental influence, the gap spark discharge voltage has very big dispersiveness, and the standard deviation of discharge voltage can reach more than 8%.Prevent that the gap from malfunction not taking place, should make the operating voltage in gap significantly be lower than self discharge voltage; On the other hand, guarantee gap action message when firing pulse is seen off, improve operating voltage again as far as possible.In order to take into account the requirement that prevents malfunction and prevent tripping, existing gap design faces dilemma, only if the ratio of gap self discharge voltage/triggering discharge voltage is reached more than 3 times.But existing three electrode discharge gaps in principle, and trigger impulse is limited to the influence of main gap withstand voltage, and ten minutes is difficult to bring up to 2 to this ratio.Thereby existing controlled spark-discharge gap can not satisfy the requirement of electric power system high reliability.
2) principle of existing control gap action is; Rely on operating voltage to surpass the discharge that the tolerance intensity of main gap under the trigger impulse effect realizes main gap; Therefore discharge can only occur near the power-frequency voltage peak value, sees trigger impulse off in other phase places, and the instantaneous value of operating voltage maybe be very low; Be not enough to cause the discharge of main gap, there be " control dead area " in existing controlled spark gap in sizable time period;
3) existing three electrode control gaps have only single main gap usually, at most 2 main gaps are arranged, and withstand voltage level is low, is difficult to use in the extra-high pressure electrical network.
The development of modern power network has proposed great demand to the controlled discharge gap of high reliability, to satisfy visual plant or the overvoltage protection of parts and the quick bypass of big electric current in the alternating current-direct current transmission system.
Domestic and international existing controlled spark gap; All be the basis with the three-electrode spark gap; In Pulse Power Techniques, high voltage test research, obtained to use, the three-electrode spark gap of the two-stage series connection of existing capacitor voltage equalizing type, operating voltage can only reach about 30-50kV.Because the limitation of three electrode control gap principles, existing control gap reliable in action property is not high, and malfunction or tripping take place easily;
The existing both at home and abroad high-tension testing apparatus that constitutes with the series connection of multiple gap, for example shock wave blocks cuts wave apparatus, and only special use in laboratory is different with the function and the purposes of the utility model.
Not can be applicable at present design, patent or the product in the controlled discharge gap of the high reliability of superhigh pressure/extra-high voltage grid, no control dead area both at home and abroad.
The utility model can overcome the above-mentioned shortcoming that has controlled spark-discharge gap now on principle, solve reliable in action property effectively, eliminate key technical problems such as control dead area and raising operating voltage.
The utility model content
The purpose of the utility model is: provide a kind of high reliability controlled multiple spark-discharge gap; Can be used for the overvoltage protection of extra-high pressure AC/DC electric power system visual plant or parts and the high speed bypass of big electric current, can realize the controlled discharge gap protection function of the high reliability of superhigh pressure/extra-high voltage grid, no control dead area.
The operation principle of the utility model has the different of essence with the operation principle of existing three-electrode spark discharging gap, and the core component of the utility model is the multiple spark gap that connects step by step with the frequency dependence recurrent network.Select suitable network configuration and parameter, can obtain of the even distribution of industrial frequency AC (or direct current) operating voltage along multiple gap.The discharge voltage in multiple gap approaches the product of single gap discharge voltage and gap series.As long as select enough progression, multiple gap can tolerate very high operating voltage, thereby may be used on any electric pressure.On the contrary; Under the effect of pulse (high frequency) trigger voltage, because the regulating action that port with frequency-dependent network distributes to voltage, the voltage in multiple gap, edge distributes and becomes extremely inhomogeneous; Overwhelming majority applied voltage all concentrates on first and second gap; So that a little higher than single gap discharge voltage of amplitude the trigger voltage effect under, just can cause that cascade discharges, cause multiple gap to be discharged successively.The ratio of the discharge voltage of this gap under self discharge voltage and trigger impulse effect under the effect of power frequency operating voltage increases with the increase of gap series, selects 10 grades of gaps series connection can guarantee that the gap has high reliability, the anxiety of no malfunction or tripping.This novel controlled discharge gap can be applied to the alternating current-direct current transmission system of any electric pressure until the ultra high voltage grade.
The controlled multiple spark-discharge gap of a kind of high reliability of the utility model comprises power frequency supply, current-limiting inductance L
0, trigger generator, coupling capacitance C
0, by clearance G 1, G2 ... The multiple discharging gap that Gn is composed in series successively, resistors in parallel R1, R2 ... Rn and shunt capacitor C1, C2 ... Cn-1, said power frequency supply and current-limiting inductance L
0Cascaded structure and trigger generator and coupling capacitance C
0Cascaded structure again two leading-out terminals after the parallel connection become A point and E point respectively; Clearance G 1 is joined with left end and said A point after resistors in parallel R1 is parallelly connected, the right-hand member after clearance G 1 and the resistors in parallel R1 parallel connection with connect said E point after shunt capacitor C1 connects; Clearance G 2 is joined with left end after resistors in parallel R2 is parallelly connected and the upper end of shunt capacitor C1, the right-hand member after clearance G 2 and the resistors in parallel R2 parallel connection with connect the E point after shunt capacitor C2 connects; Clearance G n-1 joins with left end after resistors in parallel Rn-1 is parallelly connected and the upper end of shunt capacitor Cn-2, the right-hand member after clearance G n-1 and the resistors in parallel Rn-1 parallel connection with connect the E point after shunt capacitor Cn-1 connects; Clearance G n joins with left end after resistors in parallel Rn is parallelly connected and the upper end of shunt capacitor Cn-1, and clearance G n connects the E point with right-hand member after resistors in parallel Rn is parallelly connected, and wherein n is a natural number.
Wherein, each gap in the said multiple discharging gap is formed by two ball discharges, leaves spacing between said two ball discharges.
Wherein, multiple discharging gap is made up of 8 grades of rod-bar electrodes that are installed on the insulation column, leaves the scalable spacing between rod-bar electrode, and for fear of producing corona discharge, grading ring protection is all adopted in gaps at different levels up and down.
Wherein, said rod-bar electrodes at different levels all are parallel with a resistors in parallel corresponding with it, avoid the influence of amblent air temperature, all resistors in parallel R1, R2 for protecting grading resistor ... Rn all places in the compound inslation sleeve that fills insulating oil.
Wherein, said each numerical value be 100pf shunt capacitor C1, C2 ... Cn-1 all with height such as insulation column grade, and each shunt capacitor links to each other with electrodes at different levels in the multiple discharging gap through the line that is flexible coupling.
Wherein, the end of said each shunt capacitor is all protected through grading ring with the line that is flexible coupling.
Wherein, this controlled multiple spark-discharge gap integral body is placed on the insulated platform of 500kV.
For multiple gap, be provided with gap capacitance C between two ball discharges in clearance G i
Gi, said gap capacitance C
GiBe generally the electric capacity of pF magnitude, under power-frequency voltage, capacitive reactance 1/ ω C
GiMuch larger than resistance R
i, therefore the voltage in multiple gap distributes by parallel resistance and each node direct-to-ground capacitance decision, and along with the increase of frequency, the equivalent capacitive reactance in every grade of gap reduces, and network becomes the principal element that decision voltage distributes, adjustment ground capacity C
iThereby, obtain different high frequency voltage distribution characters, after the ground capacity parameter is confirmed,, can list and find the solution resistance R according to the restrictive condition that each gap voltage under the power-frequency voltage distributes and equates
iThe multiple linear equation group:
，i＝1，2，…，N-1
In the formula, U
IjRepresent the voltage between i and j the gap, Z
INThe equiva lent impedance that expression is seen into from i+1 gap head end, wherein N, i, j are natural number;
Because the equation quantity that formula (1) is confirmed has only N-1, is less than resistance quantity N to be found the solution, thus the resistance parameter of port with frequency-dependent network element choose not unique;
When the multiple gap of design, can confirm a reasonable parameter scope according to service requirement and manufacturing cost, confirm the resistance of certain resistance earlier, use formula (1) to calculate other resistance values then.
The advantage of the utility model technical scheme is:
1, the requirement of faulty action preventing and anti-tripping can not be satisfied simultaneously less than 2 in existing controlled discharge gap, self discharge voltage and the ratio that triggers discharge voltage, is difficult to guarantee operational reliability; The self discharge voltage of the utility model is linear increasing with the increase of multiple gap series, is tending towards a saturation value (a little more than the discharge voltage in single gap) and trigger discharge voltage with the increase of gap series.Self discharge voltage can be selected arbitrarily based on needs with the ratio that triggers discharge voltage.Select 8 grades of these ratios of series gap to reach more than 4 times, can guarantee high operational reliability, the anxiety of no malfunction and tripping.
2, existing controlled discharge gap must rely on the synergy of operating voltage instantaneous value and trigger impulse to accomplish and trigger discharge, exists and triggers the dead band on a large scale; The utility model only needs the independent effect of trigger impulse can accomplish the igniting in gap, does not have any control dead area;
3, operating voltage can only be born by 1-2 main gap in existing three electrode controlled discharge gaps, is applicable to low voltage grade electrical network; And the utility model can have the multiple gap of any amount to bear operating voltage, can be used for superhigh pressure until extra-high voltage grid.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further specified.
Fig. 1 is the controlled multiple spark-discharge gap schematic diagram of the utility model.Wherein, G
1, G
2G
nBe the series multiple gap; R
1C
1, R
2C
2R
N-1C
N-1For with the network of frequency dependence; L
0Be current-limiting inductance; C
0Be coupling capacitance.
Fig. 2 is the controlled multiple spark-discharge gap configuration structure sketch map according to the utility model.
Fig. 3 is according to capacitor in the controlled multiple spark-discharge gap configuration structure of the utility model and the annexation sketch map between resistance.
Fig. 4 shows the Potential distribution sketch map according to the controlled multiple spark-discharge gap of the utility model.
Embodiment
Fig. 1 is the controlled multiple spark-discharge gap schematic diagram of the utility model.Wherein, G
1, G
2G
nBe the series multiple gap; R
1C
1, R
2C
2R
N-1C
N-1For with the network of frequency dependence; L
0Be current-limiting inductance; C
0Be coupling capacitance.The concrete connected mode and the implementation method of schematic diagram are: power frequency supply and current-limiting inductance L
0Cascaded structure and trigger generator and coupling capacitance C
0Cascaded structure again two leading-out terminals after the parallel connection become A point and E point respectively; Clearance G
1With resistance R
1Parallel connection back left end and A point join right-hand member and capacitor C
1Connect the E point after the series connection; Clearance G
2With resistance R
2Parallel connection back left end and capacitor C
1The upper end join right-hand member and capacitor C
2Connect the E point after the series connection; Clearance G
N-1With resistance R
N-1Parallel connection back left end and capacitor C
N-2The upper end join right-hand member and capacitor C
N-1Connect the E point after the series connection; Clearance G
nWith resistance R
nParallel connection back left end and capacitor C
N-1The upper end join, right-hand member connects the E point.
Fig. 2, the layout plan in controlled discharge gap for the main capacitance overvoltage protection that is used for the 500kV short circuit current limiter shown in Figure 3, Fig. 2 is a front view, Fig. 3 is a left view.Multiple discharging gap is made up of 8 grades of rod-bar electrodes that are installed on the insulation column.Rod-the bar electrode distance can be based on the instructions for use flexible.For fear of producing corona discharge, gaps at different levels are protected with grading ring up and down.Grading resistors at different levels are parallelly connected with corresponding rod-rod gap.For protecting grading resistor to avoid the influence of amblent air temperature, resistors in parallel places in the compound inslation sleeve that fills insulating oil.Numerical value is direct-to-ground capacitance device and the height such as insulation column grade of 100pf, and line links to each other with the electrode of discharging gap through being flexible coupling.Capacitor-end is protected with grading ring with the line that is flexible coupling equally.Multiple gap one end is received trigger generator through isolating capacitor, and the other end is then received a utmost point of the main capacitance of 500kV short circuit current limiter.Whole controlled discharge gap is placed on the insulated platform of 500kV.
Fig. 4 shows the voltage distribution results of controlled discharge gap under the applied voltage effect of power frequency 5kHz 10kHz 15kHz, and this result and measured result meet very much.Wherein " " represents power-frequency voltage voltage; " zero " represents the 5kHz voltage to frequency; " △ " represents the 10kHz voltage to frequency, and
represents the 15kHz voltage to frequency.Can be known that by figure the voltage of controlled discharge gap under the power-frequency voltage effect distributes quite even, on the contrary, when frequency rose to 10kHz, 90% applied voltage had been born in first gap, and voltage distributes and becomes extremely inhomogeneous, and is very favourable to the triggering in gap.
Main circuit
The controlled series multiple spark-discharge gap of the utility model is by forming with the lower part:
By clearance G
1, G
2... G
nThe multiple spark-discharge gap that is in series; 2) by R
1C
1, R
2C
2... The chain network that RnCn resistance capacitance element is formed, it and multiple gap link step by step, in order to the Potential distribution of regulation and control along series gap.Grading resistor is parallelly connected with single gap, and electric capacity then is connected between each node and the ground.3) high pass loop: here be coupling capacitance C
0, isolate the power frequency operating voltage simultaneously as the path of high frequency trigger impulse; 4) trigger generator; 5) be attached to the current-limiting inductance L of system power supply
0Main circuit is as shown in Figure 1.Power frequency supply and current-limiting inductance L among the figure
0Cascaded structure and trigger generator and coupling capacitance C
0Cascaded structure again two leading-out terminals after the parallel connection become A point and E point respectively; Clearance G
1With resistance R
1Parallel connection back left end and A point join right-hand member and capacitor C
1Connect the E point after the series connection; Clearance G
2With resistance R
2Parallel connection back left end and capacitor C
1The upper end join right-hand member and capacitor C
2Connect the E point after the series connection; Clearance G
N-1With resistance R
N-1Parallel connection back left end and capacitor C
N-2The upper end join right-hand member and capacitor C
N-1Connect the E point after the series connection; Clearance G
nWith resistance R
nParallel connection back left end and capacitor C
N-1The upper end join, right-hand member connects the E point.
The parameter designing principle
For multiple gap shown in Figure 1, gap capacitance C
GiBe generally the pF magnitude.Under power-frequency voltage, capacitive reactance 1/ ω C
GiMuch larger than resistance R
i, therefore the voltage in multiple gap distributes mainly by parallel resistance and each node direct-to-ground capacitance decision.
Along with the increase of frequency, the equivalent capacitive reactance in every grade of gap reduces, and network becomes the principal element that decision voltage distributes.Adjustment ground capacity C
i, can obtain different high frequency voltage distribution characters.After the ground capacity parameter is confirmed,, can list and find the solution resistance R according to the restrictive condition that each gap voltage under the power-frequency voltage distributes and equates
iThe multiple linear equation group,
，i＝1，2，…，N-1
Wherein, U
IjRepresent the voltage between i and j the gap, Z
INThe equiva lent impedance that expression is seen into from i+1 gap head end.
Because the equation quantity that formula (1) is confirmed has only N-1, is less than resistance quantity N to be found the solution, thus the resistance parameter of port with frequency-dependent network element choose not unique.
When the multiple gap of design, can confirm a reasonable parameter scope according to service requirement and manufacturing cost, confirm the resistance of certain resistance earlier, use formula (1) to calculate other resistance values then.
Operation principle
Under low frequency or direct voltage effect, the Potential distribution in multiple gap, edge is mainly determined by the numerical value of grading resistor.Select the parallel resistance value can let the power frequency operating voltage be assigned to each gap basically equably according to above-mentioned computational methods; On the contrary, under high frequency voltage (or pulse voltage) effect, the distribution of capacitance current plays a major role to the decision Potential distribution.The parallel resistance in first gap because whole capacitive earth currents is all flowed through, and the capacitance current of the gap parallel resistance of the back of flowing through successively decreases step by step, so present utmost point uneven distribution along the high frequency Potential distribution in multiple gap.
Power-frequency voltage evenly distributes and causes each single gap almost to reach the discharge voltage of single gap simultaneously, and the total discharge voltage in multiple gap is directly proportional with the progression in single gap, and the power frequency self discharge voltage of N respacing approaches N times of single gap discharge voltage.Therefore,, can make the power-frequency voltage of whole series gap tolerance, thereby effectively avoid the danger of gap false triggering than the high several times of operating voltage as long as select suitable progression.
Because the effect of port with frequency-dependent network, high-frequency pulse voltage is utmost point uneven distribution along the gap, and most applied voltages has been born in first order gap.Apply the high-frequency impulse of the discharge voltage in a little higher than single gap of amplitude, just can cause whole series gap to produce discharge successively or title cascade discharge (cascaded discharge).The discharge voltage of whole series multiple gap under the high frequency voltage effect has increase slightly with the increase of the progression in gap, and convergence is a little more than a saturated discharge voltage of single gap discharge voltage rapidly.
In addition, and though operating voltage height and phase place how, only rely on the independent effect of firing pulse, just can guarantee the action message in gap.This operation principle and the principle of existing three electrode ignitions have the different of essence: the igniting of existing control gap must rely on the acting in conjunction of operating voltage instantaneous value and trigger impulse voltage, and the low slightly or phase place of operating voltage is not inconsistent all can cause triggering loss of ignition; The design only relies on the independent effect of trigger voltage, no matter the height and the phase place of operating voltage, can guarantee that all the gap moves reliably.
Engineering examples
Accompanying drawing 2 expression is used for the layout plan in controlled discharge gap of the main capacitance overvoltage protection of 500kV short circuit current limiter.Multiple discharging gap is made up of 8 grades of rod-bar electrodes that are installed on the insulation column.Rod-the bar electrode distance can be based on the instructions for use flexible.For fear of producing corona discharge, gaps at different levels are protected with grading ring up and down.Grading resistors at different levels are parallelly connected with corresponding rod-rod gap.For protecting grading resistor to avoid the influence of amblent air temperature, resistors in parallel places in the compound inslation sleeve that fills insulating oil.Numerical value is direct-to-ground capacitance device and the height such as insulation column grade of 100pf, and line links to each other with the electrode of discharging gap through being flexible coupling.Capacitor-end is protected with grading ring with the line that is flexible coupling equally.Multiple gap one end is received trigger generator through isolating capacitor, and the other end is then received a utmost point of the main capacitance of 500kV short circuit current limiter.Whole controlled discharge gap is placed on the insulated platform of 500kV.The gap is designed according to 3 times of operating voltages the insulation of platform.Concrete hereto engineering project, the operating voltage in gap is 16kV (effective value), considers 2 times power-frequency overvoltage, the ceiling voltage that bear under service conditions in whole controlled discharge gap is 45kV (peak value).Single clearance distance is adjusted to about 8mm, can tolerate the voltage of 20kV (peak value).Because the even distribution of multiple gap power-frequency voltage, whole 8 grades of gaps can tolerate the voltage of about 160kV, for be in operation 3.5 times of the voltage that possibly bear of gap, have guaranteed high margin of safety.Because extremely uneven distribution causes the cascade discharge under the pulse voltage effect,, the amplitude of trigger impulse can guarantee the gap action message as long as surpassing 30kV.
The utility model is described according to specific exemplary embodiment here.It will be conspicuous under the scope that does not break away from the utility model, carrying out suitable replacement to one skilled in the art or revise.Exemplary embodiment only is illustrative, rather than to the restriction of the scope of the utility model, the scope of the utility model is by appended claim definition.
Claims (7)
1. controlled multiple spark-discharge gap of high reliability, it is characterized in that: this discharging gap comprises power frequency supply, current-limiting inductance L
0, trigger generator, coupling capacitance C
0, by clearance G 1, G2 ... The multiple discharging gap that Gn is composed in series successively, resistors in parallel R1, R2 ... Rn and shunt capacitor C1, C2 ... Cn-1, said power frequency supply and current-limiting inductance L
0Cascaded structure and trigger generator and coupling capacitance C
0Cascaded structure again two leading-out terminals after the parallel connection become A point and E point respectively; Clearance G 1 is joined with left end and said A point after resistors in parallel R1 is parallelly connected, the right-hand member after clearance G 1 and the resistors in parallel R1 parallel connection with connect said E point after shunt capacitor C1 connects; Clearance G 2 is joined with left end after resistors in parallel R2 is parallelly connected and the upper end of shunt capacitor C1, the right-hand member after clearance G 2 and the resistors in parallel R2 parallel connection with connect the E point after shunt capacitor C2 connects; Clearance G n-1 joins with left end after resistors in parallel Rn-1 is parallelly connected and the upper end of shunt capacitor Cn-2, the right-hand member after clearance G n-1 and the resistors in parallel Rn-1 parallel connection with connect the E point after shunt capacitor Cn-1 connects; Clearance G n joins with left end after resistors in parallel Rn is parallelly connected and the upper end of shunt capacitor Cn-1, and clearance G n connects the E point with right-hand member after resistors in parallel Rn is parallelly connected, and wherein n is a natural number.
2. the controlled multiple spark-discharge gap of high reliability as claimed in claim 1 is characterized in that: each gap in the said multiple discharging gap is formed by two ball discharges, leaves spacing between said two ball discharges.
3. according to claim 1 or claim 2 the controlled multiple spark-discharge gap of high reliability; It is characterized in that: multiple discharging gap is made up of 8 grades of rod-bar electrodes that are installed on the insulation column; Leave the scalable spacing between rod-bar electrode, grading ring protection is all adopted in gaps at different levels up and down.
4. the controlled multiple spark-discharge gap of high reliability as claimed in claim 3 is characterized in that: said rod-bar electrodes at different levels all are parallel with a resistors in parallel corresponding with it, and all resistorss in parallel all place in the compound inslation sleeve that fills insulating oil.
5. the controlled multiple spark-discharge gap of high reliability as claimed in claim 3 is characterized in that: said each shunt capacitor all with height such as insulation column grade, and each shunt capacitor links to each other with electrodes at different levels in the multiple discharging gap through the line that is flexible coupling.
6. the controlled multiple spark-discharge gap of high reliability as claimed in claim 5 is characterized in that: the end of said each shunt capacitor is all protected through grading ring with the line that is flexible coupling.
7. the controlled multiple spark-discharge gap of high reliability as claimed in claim 1 is characterized in that: this controlled multiple spark-discharge gap integral body is placed on the insulated platform of 500kV.
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|---|---|---|---|
| CN2011202000296U CN202190072U (en) | 2011-06-15 | 2011-06-15 | High-reliability controllable multiple spark discharge gap |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202000296U CN202190072U (en) | 2011-06-15 | 2011-06-15 | High-reliability controllable multiple spark discharge gap |
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| CN109904847A (en) * | 2019-01-23 | 2019-06-18 | 西安交通大学 | A kind of plural serial stage discharging gap and its working method with selecting frequency characteristic |
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2011
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| CN103579910A (en) * | 2013-10-25 | 2014-02-12 | 南方电网科学研究院有限责任公司 | Self-triggering voltage setting method of spark gap of 500kV series compensation system |
| CN104993449A (en) * | 2015-06-23 | 2015-10-21 | 华中科技大学 | Current commutating oscillation circuit for DC breaker |
| CN104993449B (en) * | 2015-06-23 | 2017-09-29 | 华中科技大学 | A kind of dc circuit breaker change of current oscillation circuit |
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| CN108565850A (en) * | 2018-05-21 | 2018-09-21 | 西安交通大学 | The concatenated lightning protection device of multistage gap |
| CN108808644B (en) * | 2018-06-28 | 2019-08-13 | 西安交通大学 | Plural serial stage gap arrester for power electronic equipment lightning protection |
| CN108808644A (en) * | 2018-06-28 | 2018-11-13 | 西安交通大学 | Plural serial stage gap arrester for power electronic equipment lightning protection |
| CN109283442A (en) * | 2018-11-06 | 2019-01-29 | 云南电网有限责任公司红河供电局 | A kind of string benefit spark gap impact test apparatus |
| CN109283442B (en) * | 2018-11-06 | 2024-06-11 | 云南电网有限责任公司红河供电局 | Series compensation spark gap discharge impact test device |
| CN109904847A (en) * | 2019-01-23 | 2019-06-18 | 西安交通大学 | A kind of plural serial stage discharging gap and its working method with selecting frequency characteristic |
| CN113765083A (en) * | 2021-07-22 | 2021-12-07 | 西安交通大学 | Controllable multilayer gap overvoltage protector with high weldability based on graphite-metal coating |
| CN113765083B (en) * | 2021-07-22 | 2022-10-25 | 西安交通大学 | Graphite-metal coating-based controllable multilayer gap overvoltage protector with high weldability |
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