CN105470818A - Method for improving insulation recovery performance of spark gap for series compensation - Google Patents
Method for improving insulation recovery performance of spark gap for series compensation Download PDFInfo
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- CN105470818A CN105470818A CN201510957371.3A CN201510957371A CN105470818A CN 105470818 A CN105470818 A CN 105470818A CN 201510957371 A CN201510957371 A CN 201510957371A CN 105470818 A CN105470818 A CN 105470818A
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- spark gap
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- series compensation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T21/00—Apparatus or processes specially adapted for the manufacture or maintenance of spark gaps or sparking plugs
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Abstract
The invention provides a method for improving insulation recovery performance of a spark gap for series compensation. The method comprises the following steps: step 1, mounting an instantaneous ventilating device on a series compensation device; and step 2, acquiring alternating current of the spark gap of the series compensation device by using the instantaneous ventilating device, supplying air to the spark gap if the alternating current is acquired, and entering a standby state if the alternating current is not acquired. Compared with the prior art, the method for improving the insulation recovery performance of the spark gap for series compensation does not change a body structure of an existing spark gap for a series compensation device, is convenient to mount and modify and good in feasibility; and safe and stable running of the existing spark gap for the series compensation device is not affected, and the device is simple and convenient in design and high in reliability.
Description
Technical field
The present invention relates to power transmission and distribution project technical field, be specifically related to a kind of method improving series compensation spark gap insulation recovery performance.
Background technology
Series compensation (SeriesCompensation, SC), is called for short string and mends, and is that serial capacitance device group, with compensated line induction reactance, thus increases circuit transmission capacity on transmission line of alternation current, improves the UHV AC transmission technique of power transmission and transformation system maintenance level.Because it has the advantages such as safe and reliable, convenient and efficient, in the transmission system of each electric pressure, obtain general application at present.
The working method that current domestic overvoltage protection that is super, extra-high voltage series compensation device adopts metal oxide pressure-limiting device (MOV) to match with spark gap usually; wherein MOV is the main protection of Capacitor banks, and spark gap is the main protection of MOV and the backup protection of Capacitor banks.
Series compensation device generally drops into circuit again after circuit fault clearance, but requires that string is mended device and before circuit is heavily thrown successfully, just can be dropped into circuit sometimes, because this has certain benefit for raising whole system stability.Wherein, impact string mends the insulation recovery performance that the principal element of device making time is again spark gap.If this is because string mends device when heavily throwing, the tolerance value that the self discharge voltage levvl of spark gap does not return to regulation will cause it by disruptive discharge again, cause string to mend connection jumping circuit protection act, finally make circuit heavily throw failure.Insulation recovery performance refers to that spark gap is after through-flow a period of time, then between at regular intervals (50-100ms), the maximum a.c. voltage effective value that can tolerate.
The discharge voltage of open type air gap is directly proportional to atmospheric density, and namely atmospheric density is larger, then the discharge voltage in gap is higher, and namely the withstand voltage level in gap is higher.
Series compensation spark gap is when through-flow electric discharge, current peak can reach tens of to kilo-ampere up to a hundred, and produce high temperature and high pressure gas instantaneously, atmospheric density reduces rapidly, simultaneously also produce a large amount of charged particle, above-mentioned reason causes spark gap, and after electric discharge conducting, its insulation level cannot quick-recovery soon.
Summary of the invention
In order to meet the needs of prior art, the invention provides a kind of method improving series compensation spark gap insulation recovery performance.
Technical scheme of the present invention is:
Described method comprises:
Step 1: install instantaneous ventilation unit on series compensation device;
Step 2: described instantaneous ventilation unit gathers the alternating current of the spark gap of described series compensation device, if collect described alternating current, blows to described spark gap, if do not collect described alternating current, standby.
Preferably, the air outlet distance spark gap 1 meter of instantaneous ventilation unit in described step 1, and just to this spark gap.
Preferably, described instantaneous ventilation unit comprises that get can parts, driver part and wind component;
Described getting can parts, for the alternating current of spark gap is converted to direct current, and send it to driver part; Described getting can comprise current transformer, full bridge rectifier and capacitor by parts;
Described driver part comprises DC motor and gear box; Described DC motor one end with get can parts be connected, the other end is connected with gear box, the pinion rotation in driving gearbox;
Described wind component comprises wind wheel and wind guide channel; Described wind wheel is connected with gear box; The wind-force guiding afterflow gap that wind wheel produces by described wind guide channel.
Preferably,
The number of described current transformer is that two, two current transformers are sleeved on the outlet casing tube of spark gap successively, and the winding of each current transformer is arranged in respective aluminium shell; The secondary side of described current transformer exports and accesses full bridge rectifier by Shielded Twisted Pair;
The number of described full bridge rectifier is two, and each full bridge rectifier comprises two rectifier diode modules; Described rectifier diode module is composed in series by two high-voltage great-current rectifier diodes;
Described capacitor is connected in parallel on the branch road outlet side of full bridge rectifier, for supporting voltage.
Preferably, the number of described DC motor is four;
Be connected with the described DC output side getting the full bridge rectifier of energy parts after the input series connection of every two DC motor;
Four DC motor are connected with four split axles of gear box respectively by unidirectional coupling device.
Preferably, described gear box comprises four split axles, four planetary gears and a central gear;
One end of described split axle is connected with DC motor, and the other end is connected with planetary gear;
Central gear described in described four planet gear drives;
Described central gear is connected by the wind wheel of positive coupling with described wind component.
Preferably, described wind wheel comprises Multi-wing centrifugal vane and impeller housing;
Described impeller housing, for importing extraneous air when Multi-wing centrifugal vane rotates;
The outlet of described wind guide channel is provided with grading ring, prevents corona discharge.
Preferably, described device comprises mounting bracket and angle-adjusting bracket;
Described mounting bracket this device is fixed on the brace summer of spark gap enclosure bottom capable on, identical with the current potential of spark gap;
One end of described angle-adjusting bracket is connected with wind component, and one end is connected with mounting bracket, for adjusting the angle of wind part air-out.。
Compared with immediate prior art, excellent effect of the present invention is:
1, a kind of method improving series compensation spark gap insulation recovery performance provided by the invention, does not change the body construction of existing series compensation device spark gap, is convenient to install transformation, and feasibility is good;
2, a kind of method improving series compensation spark gap insulation recovery performance provided by the invention, do not affect the safe and stable operation of existing series compensation device spark gap, apparatus design is simple and easy to do, and reliability is high;
3, a kind of method improving series compensation spark gap insulation recovery performance provided by the invention, can in the very short time after spark gap conducting, accelerate the cross-ventilation speed of its inside, the rapid atmospheric density improving electric discharge position, the insulation tolerance level of spark gap is recovered sooner, reaches the object improving spark gap insulation recovery performance;
4, a kind of method improving series compensation spark gap insulation recovery performance provided by the invention, by optimal design, this device does not work when spark gap does not discharge conducting, therefore not consumes energy, and have extremely low maintenance intensity, reliability is high.But can start in tens of microseconds during spark gap conducting again, until reach maximum (top) speed during the arc extinction of spark gap, and utilize in the inertia several seconds after a loss of power and continue to provide wind-force.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further described.
Fig. 1: a kind of method flow diagram improving series compensation spark gap insulation recovery performance in the embodiment of the present invention;
Fig. 2: a kind of scheme of installation of the instantaneous forced ventilation device for series compensation spark gap in the embodiment of the present invention;
The installation site partial schematic diagram of spark gap and instantaneous forced ventilation device in Fig. 3: Fig. 2;
Fig. 4: a kind of structural representation of the instantaneous forced ventilation device for series compensation spark gap in the embodiment of the present invention;
Fig. 5: a kind of schematic diagram of the instantaneous forced ventilation device for series compensation spark gap in the embodiment of the present invention;
Wherein, 111: current transformer; 112: rectifier diode module; 113: capacitor; 211: DC motor; 212: gear box; 311: wind wheel and shell thereof; 312: air guide hole; 313: grading ring; 314: angular adjustment frame; 4: mounting bracket; 5: spark gap outlet casing tube; 6: arc electrode; 7: top electrode; 8: bottom electrode; 9: binding post; 10: spark gap.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
A kind of embodiment improving the method for series compensation spark gap insulation recovery performance provided by the invention as shown in Figure 1, is specially:
One, instantaneous ventilation unit is installed on series compensation device.
The air outlet distance spark gap 1 meter of instantaneous ventilation unit in the present embodiment, and just to this spark gap 10.
Two, instantaneous ventilation unit gathers the alternating current of the spark gap 10 of series compensation device, if collect alternating current, blows to described spark gap 10, if do not collect alternating current, standby.
As shown in Figures 3 and 4, in the present embodiment, instantaneous ventilation unit comprises that get can parts, driver part and wind component.Its operation principle as shown in Figure 5, wherein,
Get energy parts, for the alternating current of spark gap 10 is converted to direct current, and send it to driver part.
Driver part comprises DC motor 211 and gear box 212; DC motor 211 one end with get can parts be connected, the other end is connected with gear box 212, the pinion rotation in driving gearbox 212.
Wind component comprises wind wheel 311 and wind guide channel 312; Wind wheel 311 is connected with gear box 212; The wind-force guiding afterflow gap that wind wheel 311 produces by wind guide channel 312.
One, getting can parts
Get in the present embodiment and can comprise current transformer 111, full bridge rectifier 112 and capacitor 113 by parts.Wherein,
1, current transformer
The number of current transformer 111 is two, and as shown in Figure 2, two current transformers 111 are sleeved on the outlet casing tube 5 of spark gap successively, and the winding of each current transformer 111 is arranged in respective aluminium shell; The secondary side of current transformer exports by Shielded Twisted Pair access full bridge rectifier 112.
In the present embodiment, current transformer 111 is sleeved on the outside of spark gap shell bottom plate, needs to consider its core dimensions and umber of turn during design, to make it obtain energy to greatest extent, there will not be insulation breakdown and magnetic saturation problem simultaneously.
2, full bridge rectifier
The number of full bridge rectifier 112 is two, and each full bridge rectifier 112 comprises two rectifier diode modules; Rectifier diode module is composed in series by two high-voltage great-current rectifier diodes.
In the present embodiment, full bridge rectifier 112 can by by directly flowing to DC motor 211. after the alternating current rectification of spark gap
3, capacitor
Capacitor 113 is connected in parallel on the branch road outlet side of full bridge rectifier 112, for supporting voltage.
Two, driver part
1, DC motor
In the present embodiment, the number of DC motor 211 is four.Wherein,
Be connected with the DC output side of full bridge rectifier 112 after the input series connection of every two DC motor 211, powered by a full bridge rectifier 211.
Four DC motor 211 are connected with four split axles of gear box 212 respectively by unidirectional coupling device.
2, gear box
The present embodiment middle gear case 212 comprises four split axles, four planetary gears and a central gear.Wherein,
1.: one end of split axle is connected with DC motor 211, and the other end is connected with planetary gear.
2.: four planet gear drives central gears rotate.
3.: central gear is connected with the wind wheel 311 of wind component by positive coupling.
To sum up, four DC motor 211 can be made to form the form of Parallel opertation, and last central gear is connected with wind wheel, defines the form that four motors drive a wind wheel jointly.
Three, wind component
In the present embodiment, red wind wheel 311 comprises Multi-wing centrifugal vane and impeller housing.Wherein,
Impeller housing, for importing extraneous air when Multi-wing centrifugal vane rotates.The outlet 312 of wind guide channel is provided with grading ring 313, prevents corona discharge.Namely four DC motor 211 drive a wind wheel 311 jointly, within the extremely short time, produce wind-force, and wind wheel shell carrier gas inside forms larger blast, breezes up, guiding of simultaneously keeping watch wind guide channel 312.
In the present embodiment, instantaneous forced ventilation device also comprises mounting bracket 4 and angle-adjusting bracket 314, wherein,
Mounting bracket 4 this device is fixed on the brace summer of spark gap enclosure bottom capable on, identical with the current potential of spark gap, small volume, can not produce excessive impact to spark gap internal electric field, also can not affect the safe and stable operation of spark gap.One end of angle-adjusting bracket 314 is connected with wind component, and one end and mounting bracket connect 4 and connect, for adjusting the angle of wind part air-out.
In the present embodiment, during spark gap 10 conducting, the discharging current of the main capacitor bank of series compensation device flows through the outlet casing tube of spark gap, gets and can gather the alternating current of spark gap and be converted to direct current by parts; During spark gap 10 not conducting, instantaneous forced ventilation device is not charged, idle.Now the advantage of instantaneous forced ventilation device is:
1.: instantaneous forced ventilation device is not charged at ordinary times, uncertain impact can not be produced on the safe and stable operation of spark gap, also reduce the record that each parts of device are damaged simultaneously, reduce repair and maintenance intensity.
2.: decrease the synchronous required circuit with spark gap conducting, ensure that it plays a role in very short time as much as possible.
3.: because the electric current flowing through outlet casing tube during spark gap conducting can reach tens of to kilo-ampere up to a hundred, therefore device can be made to get startup energy as much as possible, improve wind speed round, namely increase air-out speed, thus give play to force ventilated effect better.
Finally should be noted that: described embodiment is only some embodiments of the present application, instead of whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the application's protection.
Claims (8)
1. improve a method for series compensation spark gap insulation recovery performance, it is characterized in that, described method comprises:
Step 1: install instantaneous ventilation unit on series compensation device;
Step 2: described instantaneous ventilation unit gathers the alternating current of the spark gap of described series compensation device, if collect described alternating current, blows to described spark gap, if do not collect described alternating current, standby.
2. the method for claim 1, is characterized in that, the air outlet distance spark gap 1 meter of instantaneous ventilation unit in described step 1, and just to this spark gap.
3. the method for claim 1, is characterized in that, described instantaneous ventilation unit comprises gets energy parts, driver part and wind component;
Described getting can parts, for the alternating current of spark gap is converted to direct current, and send it to driver part; Described getting can comprise current transformer, full bridge rectifier and capacitor by parts;
Described driver part comprises DC motor and gear box; Described DC motor one end with get can parts be connected, the other end is connected with gear box, the pinion rotation in driving gearbox;
Described wind component comprises wind wheel and wind guide channel; Described wind wheel is connected with gear box; The wind-force guiding afterflow gap that wind wheel produces by described wind guide channel.
4. method as claimed in claim 2, is characterized in that,
The number of described current transformer is that two, two current transformers are sleeved on the outlet casing tube of spark gap successively, and the winding of each current transformer is arranged in respective aluminium shell; The secondary side of described current transformer exports and accesses full bridge rectifier by Shielded Twisted Pair;
The number of described full bridge rectifier is two, and each full bridge rectifier comprises two rectifier diode modules; Described rectifier diode module is composed in series by two high-voltage great-current rectifier diodes;
Described capacitor is connected in parallel on the branch road outlet side of full bridge rectifier, for supporting voltage.
5. method as claimed in claim 2, it is characterized in that, the number of described DC motor is four;
Be connected with the described DC output side getting the full bridge rectifier of energy parts after the input series connection of every two DC motor;
Four DC motor are connected with four split axles of gear box respectively by unidirectional coupling device.
6. method as claimed in claim 2, it is characterized in that, described gear box comprises four split axles, four planetary gears and a central gear;
One end of described split axle is connected with DC motor, and the other end is connected with planetary gear;
Central gear described in described four planet gear drives;
Described central gear is connected by the wind wheel of positive coupling with described wind component.
7. method as claimed in claim 2, it is characterized in that, described wind wheel comprises Multi-wing centrifugal vane and impeller housing;
Described impeller housing, for importing extraneous air when Multi-wing centrifugal vane rotates;
The outlet of described wind guide channel is provided with grading ring, prevents corona discharge.
8. method as claimed in claim 2, it is characterized in that, described device comprises mounting bracket and angle-adjusting bracket;
Described mounting bracket this device is fixed on the brace summer of spark gap enclosure bottom capable on, identical with the current potential of spark gap;
One end of described angle-adjusting bracket is connected with wind component, and one end is connected with mounting bracket, for adjusting the angle of wind part air-out.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510957371.3A CN105470818B (en) | 2015-12-18 | 2015-12-18 | Method for improving series compensation spark gap insulation recovery performance |
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| CN201510957371.3A CN105470818B (en) | 2015-12-18 | 2015-12-18 | Method for improving series compensation spark gap insulation recovery performance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109570591A (en) * | 2019-01-08 | 2019-04-05 | 湘潭大学 | Centrifugal impeller cutting working method and device and centrifugal impeller process equipment |
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| CN101159368A (en) * | 2007-09-28 | 2008-04-09 | 王巨丰 | Air blast arc-quenching lightning protection inter space device |
| CN102263376A (en) * | 2010-05-25 | 2011-11-30 | 王巨丰 | Gas arc extinguishing apparatus |
| CN102856021A (en) * | 2012-09-27 | 2013-01-02 | 王巨丰 | Follow current-free arc lightening-protection gap protection device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101159368A (en) * | 2007-09-28 | 2008-04-09 | 王巨丰 | Air blast arc-quenching lightning protection inter space device |
| CN102263376A (en) * | 2010-05-25 | 2011-11-30 | 王巨丰 | Gas arc extinguishing apparatus |
| CN102856021A (en) * | 2012-09-27 | 2013-01-02 | 王巨丰 | Follow current-free arc lightening-protection gap protection device |
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| CN109570591A (en) * | 2019-01-08 | 2019-04-05 | 湘潭大学 | Centrifugal impeller cutting working method and device and centrifugal impeller process equipment |
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