CN205452786U - A instantaneous forced draft device for spark gap for cascade compensation - Google Patents
A instantaneous forced draft device for spark gap for cascade compensation Download PDFInfo
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- CN205452786U CN205452786U CN201521066389.6U CN201521066389U CN205452786U CN 205452786 U CN205452786 U CN 205452786U CN 201521066389 U CN201521066389 U CN 201521066389U CN 205452786 U CN205452786 U CN 205452786U
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- 238000009434 installation Methods 0.000 abstract description 2
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- 238000009413 insulation Methods 0.000 description 6
- 238000011084 recovery Methods 0.000 description 6
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model provides an instantaneous forced draft device for spark gap for cascade compensation, including getting ability module, drive module and air -out module, it can the module to get for convert spark gap's alternating current into direct current, and send it to drive module, drive module includes dc motor and gear box, dc motor one end can the module be connected with getting, and the other end is connected with the gear box, gear revolve among the driving gear box, the air -out module includes wind wheel and wind -guiding way, the wind wheel is connected with the gear box, the wind -guiding is said the wind -force direction afterflow clearance of wind wheel production. Compared with the prior art, the utility model provides a pair of an instantaneous forced draft device for spark gap for cascade compensation does not change the body structure who has cascade compensation spark gap for the device now, and the installation of being convenient for is reformed transform, and the feasibility is good, do not influence current cascade compensation spark gap's for the device safety and stability operation, device design simple accurate, the reliability is high.
Description
Technical field
This utility model relates to power transmission and distribution project technical field, is specifically related to a kind of instantaneous forced ventilation device for series compensation spark gap.
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.There is because of it advantages such as safe and reliable, convenient and efficient, in the transmission system of each electric pressure, obtained universal application at present.
The working method that current domestic super, the overvoltage protection of extra-high voltage series compensation device generally uses metal oxide pressure-limiting device (MOV) to match with spark gap; wherein MOV is the main protection of Capacitor banks, and spark gap is main protection and the back-up protection of Capacitor banks of MOV.
Series compensation device is usually and puts into circuit after circuit fault clearance again, but requires that series compensation device can just put into circuit before circuit is heavily thrown successfully sometimes, because this has certain benefit for improving whole system stability.Wherein, the principal element affecting series compensation device making time again is the insulation recovery performance of spark gap.If this is because series compensation device is when heavily throwing, the self discharge voltage levvl of spark gap does not returns to the tolerance value of regulation and it will be caused by disruptive discharge again, causes string to mend connection jumping circuit protection act, finally makes circuit heavily throw failure.Insulation recovery performance refer to spark gap after through-flow a period of time, then between at regular intervals (50-100ms), it is possible to the maximum a.c. voltage virtual value of tolerance.
The discharge voltage of open type the air gap is directly proportional to atmospheric density, i.e. atmospheric density is the biggest, then the discharge voltage in gap is the highest, and namely the resistance to voltage levels in gap is the highest.
Series compensation spark gap is when through-flow electric discharge, current peak is up to tens of to up to a hundred kilo-amperes, duration is up to tens of to up to a hundred milliseconds, moment produces high temperature and high pressure gas, atmospheric density reduces rapidly, simultaneously also producing a large amount of charged particle, above-mentioned reason causes spark gap, and after electric discharge conducting, its dielectric level cannot quick-recovery soon.Accordingly, it is desirable to provide a kind of resistance to voltage levels enabling to flashover gap is able to fast quick-recovery, improve the device of the insulation recovery performance of existing spark gap.
Summary of the invention
In order to meet the needs of prior art, this utility model provides a kind of instantaneous forced ventilation device for series compensation spark gap.
The technical solution of the utility model is:
Described device includes taking energy module, driving module and air-out module；
Described take can module, for the alternating current of spark gap is converted to DC current, and send it to drive module；Described taking module can include current transformer, full bridge rectifier and capacitor；
Described driving module includes dc motor and gear-box；Described dc motor one end can module be connected with taking, and the other end is connected with gear-box, drives the pinion rotation in gear-box；
Described air-out module includes wind wheel and wind guide channel；Described wind wheel is connected with gear-box；The wind-force that wind wheel is produced by described wind guide channel guides afterflow gap.
Preferably,
The number of described current transformer is two, and 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 output of described current transformer accesses full bridge rectifier by Shielded Twisted Pair；
The number of described full bridge rectifier is two, and each full bridge rectifier includes two commutation diode modules；Described commutation diode module is composed in series by two high-voltage great-current commutation diodes；
Described capacitor is connected in parallel on the branch road outlet side of full bridge rectifier, is used for supporting voltage.
Preferably, the number of described dc motor is four；
After the input series connection of every two dc motors, the DC output side with the described full bridge rectifier taking energy module is connected；
Four dc motors are connected with four split axles of gear-box by unidirectional coupling device respectively.
Preferably, described gear-box includes 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 with the wind wheel of described air-out module by positive coupling.
Preferably, described wind wheel includes 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 includes mounting bracket and angle-adjusting bracket；
Described mounting bracket secures the device on the support beam row of spark gap enclosure bottom, identical with the current potential of spark gap；
One end of described angle-adjusting bracket is connected with air-out module, and one end is connected with mounting bracket, for regulating the angle of air-out module air-out.
Preferably,
During spark gap conducting, the discharge current of the main capacitor bank of series compensation device flows through the outlet casing tube of spark gap, described in take and module can gather the alternating current of spark gap and be converted to DC current；
When spark gap is not turned on, described instantaneous forced ventilation device is not charged.
Compared with immediate prior art, excellent effect of the present utility model is:
1, a kind of instantaneous forced ventilation device for series compensation spark gap that this utility model provides, does not change the body construction of existing series compensation device spark gap, it is simple to installing transformation, feasibility is good；
2, a kind of instantaneous forced ventilation device for series compensation spark gap that this utility model provides, does not affect the safe and stable operation of existing series compensation device spark gap, and device design is simple and easy to do, and reliability is high；
3, a kind of instantaneous forced ventilation device for series compensation spark gap that this utility model provides, can be in the very short time after spark gap turns on, accelerate its internal cross-ventilation speed, improve rapidly the atmospheric density at electric discharge position, the insulation tolerance level making spark gap faster recovers, and plays the effect improving spark gap insulation recovery performance；
4, a kind of instantaneous forced ventilation device for series compensation spark gap that this utility model provides, is designed by optimization, and this device does not works when spark gap does not discharges conducting, does not the most expend energy, has extremely low maintenance intensity, and reliability is high.But can starting in tens of microseconds during spark gap conducting again, until reaching maximum (top) speed during the arc extinction of spark gap, and persistently providing wind-force in utilizing the inertia several seconds after a loss of power.
Accompanying drawing explanation
Below in conjunction with the accompanying drawings this utility model is further illustrated.
Fig. 1: the structural representation of a kind of instantaneous forced ventilation device for series compensation spark gap in this utility model embodiment；
Fig. 2: the schematic diagram of a kind of instantaneous forced ventilation device for series compensation spark gap in this utility model embodiment；
Fig. 3: the scheme of installation of a kind of instantaneous forced ventilation device for series compensation spark gap in this utility model embodiment；
Wherein, 111: current transformer；112: commutation 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: upper electrode；8: bottom electrode；9: binding post；10: flashover gap.
Detailed description of the invention
Of the present utility model embodiment is described below in detail, and the example of described embodiment is shown in the drawings, and the most same or similar label represents same or similar element or has the element of same or like function.The embodiment described below with reference to accompanying drawing is exemplary, it is intended to be used for explaining this utility model, and it is not intended that to restriction of the present utility model.
This utility model provide a kind of instantaneous forced ventilation device for series compensation spark gap embodiment its operation principle as shown in Figure 1 as in figure 2 it is shown, particularly as follows:
This device includes taking energy module, driving module and air-out module.Wherein,
Take energy module, for the alternating current of spark gap 10 is converted to DC current, and send it to drive module.
Module is driven to include dc motor 211 and gear-box 212；Dc motor 211 one end can module be connected with taking, and the other end is connected with gear-box 212, drives the pinion rotation in gear-box 212.
Air-out module includes wind wheel 311 and wind guide channel 312；Wind wheel 311 is connected with gear-box 212；The wind-force that wind wheel 311 is produced by wind guide channel 312 guides afterflow gap.
One, taking can module
The present embodiment takes and module can include current transformer 111, full bridge rectifier 112 and capacitor 113.Wherein,
1, current transformer
The number of current transformer 111 is two, as it is shown on figure 3, two current transformers 111 are sleeved on the outlet casing tube 5 of spark gap successively, the winding of each current transformer 111 is arranged in respective aluminium shell；The secondary side output of current transformer accesses full bridge rectifier 112 by Shielded Twisted Pair.
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, so that it obtains energy to greatest extent, does not haves 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 includes two commutation diode modules；Commutation diode module is composed in series by two high-voltage great-current commutation diodes.
In the present embodiment, full bridge rectifier 112 can be by by being delivered directly 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, is used for supporting voltage.
Two, module is driven
1, dc motor
In the present embodiment, the number of dc motor 211 is four.Wherein,
It is connected with the DC output side of full bridge rectifier 112 after the input series connection of every two dc motors 211, a full bridge rectifier 211 powers.
Four dc motors 211 are connected with four split axles of gear-box 212 by unidirectional coupling device respectively.
2, gear-box
The present embodiment middle gear case 212 includes 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 air-out module by positive coupling.
To sum up, so that four dc motors 211 constitute the form of Parallel opertation, last central gear is connected with wind wheel, defines four motors and jointly drives the form of a wind wheel.
Three, air-out module
In the present embodiment, red wind wheel 311 includes 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.I.e. four dc motors 211 drive a wind wheel 311 jointly, produce wind-force within the extremely short time, and wind wheel shell carrier gas is internally formed bigger blast, breezes up, guiding of simultaneously keeping watch wind guide channel 312.
In the present embodiment, instantaneous forced ventilation device also includes mounting bracket 4 and angle-adjusting bracket 314, wherein,
Mounting bracket 4 secures the device on the support beam row of spark gap enclosure bottom, identical with the current potential of spark gap, small volume, spark gap internal electric field will not be produced excessive impact, also not interfere with the safe and stable operation of spark gap.One end of angle-adjusting bracket 314 is connected with air-out module, and one end and mounting bracket connect 4 and connect, for regulating the angle of air-out module air-out.
In the present embodiment, when spark gap 10 turns on, the discharge current of the main capacitor bank of series compensation device flows through the outlet casing tube of spark gap, takes and module can gather the alternating current of spark gap and be converted to DC current；When spark gap 10 is not turned on, instantaneous forced ventilation device is not charged, idle.The advantage of the most instantaneous forced ventilation device is:
1.: instantaneous forced ventilation device is the most not charged, the safe and stable operation of spark gap will not be produced uncertain impact, also reduce the record that each parts of device are damaged simultaneously, reduce repair and maintenance intensity.
2.: decrease with spark gap conducting synchronization needed for circuit, ensure that it plays a role in very short time as much as possible.
3.: tens of to up to a hundred kilo-ampere can be reached owing to flowing through the electric current of outlet casing tube when spark gap turns on, therefore device can be made to get startup energy as much as possible, improve wind speed round, i.e. increase out wind velocity, thus preferably given play to force ventilated effect.
Finally should be noted that: described embodiment is only some embodiments of the present application rather than whole embodiments.Based on the embodiment in the application, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of the application protection.
Claims (7)
1. the instantaneous forced ventilation device for series compensation spark gap, it is characterised in that described device includes taking energy module, driving module and air-out module；
Described take can module, for the alternating current of spark gap is converted to DC current, and send it to drive module；Described taking module can include current transformer, full bridge rectifier and capacitor；
Described driving module includes dc motor and gear-box；Described dc motor one end can module be connected with taking, and the other end is connected with gear-box, drives the pinion rotation in gear-box；
Described air-out module includes wind wheel and wind guide channel；Described wind wheel is connected with gear-box；The wind-force that wind wheel is produced by described wind guide channel guides afterflow gap.
2. device as claimed in claim 1, it is characterised in that
The number of described current transformer is two, and 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 output of described current transformer accesses full bridge rectifier by Shielded Twisted Pair；
The number of described full bridge rectifier is two, and each full bridge rectifier includes two commutation diode modules；Described commutation diode module is composed in series by two high-voltage great-current commutation diodes；
Described capacitor is connected in parallel on the branch road outlet side of full bridge rectifier, is used for supporting voltage.
3. device as claimed in claim 1, it is characterised in that the number of described dc motor is four；
After the input series connection of every two dc motors, the DC output side with the described full bridge rectifier taking energy module is connected；
Four dc motors are connected with four split axles of gear-box by unidirectional coupling device respectively.
4. device as claimed in claim 1, it is characterised in that described gear-box includes 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 with the wind wheel of described air-out module by positive coupling.
5. device as claimed in claim 1, it is characterised in that described wind wheel includes 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.
6. device as claimed in claim 1, it is characterised in that described device includes mounting bracket and angle-adjusting bracket；
Described mounting bracket secures the device on the support beam row of spark gap enclosure bottom, identical with the current potential of spark gap；
One end of described angle-adjusting bracket is connected with air-out module, and one end is connected with mounting bracket, for regulating the angle of air-out module air-out.
7. device as claimed in claim 1, it is characterised in that
During spark gap conducting, the discharge current of the main capacitor bank of series compensation device flows through the outlet casing tube of spark gap, described in take and module can gather the alternating current of spark gap and be converted to DC current；
When spark gap is not turned on, described instantaneous forced ventilation device is not charged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521066389.6U CN205452786U (en) | 2015-12-18 | 2015-12-18 | A instantaneous forced draft device for spark gap for cascade compensation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521066389.6U CN205452786U (en) | 2015-12-18 | 2015-12-18 | A instantaneous forced draft device for spark gap for cascade compensation |
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| CN205452786U true CN205452786U (en) | 2016-08-10 |
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| CN201521066389.6U Active CN205452786U (en) | 2015-12-18 | 2015-12-18 | A instantaneous forced draft device for spark gap for cascade compensation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105470814A (en) * | 2015-12-18 | 2016-04-06 | 中国电力科学研究院 | Instantaneous forced ventilating device of spark gap for series compensation |
| CN106347646A (en) * | 2016-09-23 | 2017-01-25 | 华南理工大学 | Device for eliminating corona of rotor wing of rotor wing type unmanned aerial vehicle |
-
2015
- 2015-12-18 CN CN201521066389.6U patent/CN205452786U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105470814A (en) * | 2015-12-18 | 2016-04-06 | 中国电力科学研究院 | Instantaneous forced ventilating device of spark gap for series compensation |
| CN105470814B (en) * | 2015-12-18 | 2022-09-16 | 中国电力科学研究院 | Instantaneous forced ventilation device for spark gap for series compensation |
| CN106347646A (en) * | 2016-09-23 | 2017-01-25 | 华南理工大学 | Device for eliminating corona of rotor wing of rotor wing type unmanned aerial vehicle |
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