CN201199632Y - Parallel capacitor apparatus with dual over-voltage protection - Google Patents
Parallel capacitor apparatus with dual over-voltage protection Download PDFInfo
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- CN201199632Y CN201199632Y CNU2008203006832U CN200820300683U CN201199632Y CN 201199632 Y CN201199632 Y CN 201199632Y CN U2008203006832 U CNU2008203006832 U CN U2008203006832U CN 200820300683 U CN200820300683 U CN 200820300683U CN 201199632 Y CN201199632 Y CN 201199632Y
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- overvoltage
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- damping device
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The utility model relates to a parallel capacitor device with duplicate overvoltage protection; one end of the reactor or capacitor group thereof is connected with a lightning arrester, the other end of the lighting arrester is grounded; the both ends of the inlet-outlet wire of the reactor are parallelly connected with an overvoltage damping device formed by connecting the resistor and the gap in series. The lighting arrester forms effective protection for the ground insulation of the capacitor device. When the capacitor group is connected through or cut down, the overvoltage on the reactor facilitates the gap of the overvoltage damping device to puncture and discharge, the loop of the of the overvoltage damping device restrains the overvoltage and over current of capacitor group, restrains the amplitude of the switching overvoltage and reduces steepness and the process of the switching surge. A discharging calculator can be connected in the loop of the overvoltage damping device in series to monitor if the circuit breaker restrikes. The design effectively protects the parallel connecting capacitors, and obviously reduces the switching overvoltage; the operation is reliable, the device is not affected by the environment and weather, the thermal capacity is large, the work is instantaneous, the divides are automatic, the protection of reducing overvoltage is effectively performed.
Description
(1) technical field
The utility model relates to the shunt capacitance device of electric power power transmission and transformation system capacitive power compensation, is specially a kind of parallel capacitor device of dual overvoltage protection.
(2) background technology
The GB/T311.2-2002 insulation coordination of the high-tension power transmission and transformation equipment " use guide rule " points out: the bang that causes circuit breaker when cutting off capacity current (excision nonloaded line, cable or capacitor group) is worn and can be produced extrahazardous overvoltage, the circuit breaker that must use nothing to thump and wear; During switching load or burden without work, the medium voltage breaker of some type can produce repeatedly transient current disjunction, can produce overvoltage up to 6.0p.u. as not taking the due care measure.
In GB50227-1995 " Code for design of installation of shunt capacitors ", proposed following aspect and will produce switching overvoltage:
Closing overvoltage.Contact bounce overvoltage when being mainly non-Switching Synchronization overvoltage, combined floodgate.
Voltage is passed in the single-phase bang that mains side has single phase ground fault or do not have a single phase ground fault during separating brake.
Voltage is passed in the two-phase bang during separating brake.
Voltage is passed in the repeatedly bang that breaker operator once produces.
Other and the relevant overvoltage of operation of capacitor device group.
3～66kV is an isolated neutral system, and the neutral point that is connected to the capacitor group in this system is all unearthed.Therefore, capacitor group switching circuit breaker is because the bang that changes of properties such as the same period, spring, arc extinguishing occur is worn, and the overvoltage of equipment insulation against ground level may appear surpassing in the mains side of capacitor group (high-pressure side) over the ground.Short-circuiting device generation two-phase bang is worn when cut-offfing the capacitor group, then between capacitor pole overvoltage can reach 2.87 times and more than, surpassed the corresponding insulation level of capacitor.
It is unavoidable can producing overvoltage during capacitor group switching, in order to reduce the overvoltage amplitude, protects the safety of loop equipment, so installing suppresses the lightning arrester of switching overvoltage, this is the main means of capacitor group restriction switching overvoltage.Install lightning arrester additional, select the zero-clearance zinc oxide lightning arrester of capacitor group special use usually for use.Because the gapless metal-oxide lighting arrester function admirable, this lightning arrester has at home and abroad obtained to use widely in the overvoltage protection of each step voltage.
But the electrode insulation that traditional lightning arrester relatively can not capacitor for voltage protection, and because multiple factor affecting, relatively lightning arrester is in operation and repeatedly has an accident.Particularly the interpolar overvoltage to capacitor does not have ripe safeguard measure, is difficult to be provided with the interpolar overvoltage protection of capacitor at present.
In a word, the protection of the switching overvoltage of capacitor is to press at present to deal with problems.
(3) utility model content
The purpose of this utility model is the parallel capacitor device of a kind of dual overvoltage protection of design; between capacitor pole-ground, insert lightning arrester; overvoltage damping device in parallel on the reactor of capacitor group series connection forms effective dual operation overvoltage protection to capacitor device simultaneously.
The parallel capacitor device of the dual overvoltage protection of the utility model design comprises capacitor group and the reactor of connecting with it, and a termination of reactor or capacitor group has lightning arrester, the other end ground connection of lightning arrester; Its difference is that described reactor turnover line two ends also are parallel with overvoltage damping device, and overvoltage damping device mainly is in series by resistor and gap.
When reactor is connected on the mains side of capacitor group, one of described lightning arrester terminates at arbitrary end of reactor, and when reactor is connected on the capacitor group by neutral point side, one of described lightning arrester terminates at the mains side of capacitor group.
Lightning arrester can form effective overvoltage protection to the insulation against ground of capacitor device equipment.
When connecting or excising above-mentioned capacitor group, act on the spark-over of gap that overvoltage on the above-mentioned reactor can make its overvoltage damping device in parallel, the resistor that will connect with the gap inserts the loop, this resistor consumption electromagnetic viscosimeter energy.In the transient process of spark-over of gap, the overvoltage and the overcurrent of the loop suppression capacitor group that this overvoltage damping device constitutes.When transient process finished, series reactor recovered steady state voltage, and the reliable arc extinguishing in gap breaks resistor from the loop, avoid unnecessary loss.
Overvoltage damping device can suppress the switching overvoltage amplitude, reduces the operation wave steepness, and can shorten the operation wave process.
Overvoltage damping device can effectively form the electrode insulation protection to capital equipments such as the circuit breaker in the parallel capacitor device loop, reactor, capacitor, discharge coils.
But in the loop of overvoltage damping device and/or the earth terminal of lightning arrester discharged in series counter also, whether restrike with monitoring breaker, in time find and the circuit breaker that will frequently restrike in time out of service, to avoid serious accident.
This overvoltage damping device is 125～1800mm with the distance of reactor, to guarantee the insulation of the two.
The advantage of the parallel capacitor device of the dual overvoltage protection of the utility model is: 1, parallel capacitor device is effectively protected, the operation of equipment overvoltage significantly reduces; After the voltage damping device is installed in the test result explanation additional, maximum overvoltage multiple and all significantly reductions of maximum inrush phenomenon multiple between maximum overvoltage multiple, the maximum overvoltage multiple of reactor interpolar, capacitor pole group between the maximum overvoltage multiple of reactor head end, reactor and capacitor group; 2, overvoltage damping device is reliable; it does not have oil; movement-less part, nothing wearing and tearing; passive, lossless; non-magnetic conduction, the design of no circulation structure, its gap is not subjected to environment, climatic effect, and thermal capacity is big, good weatherability; instantaneous work, automatic deciliter are effectively played and are reduced superpotential protective effect.
(4) description of drawings
Fig. 1 is parallel capacitor device embodiment 1 structural representation of this dual overvoltage protection;
Fig. 2 is the parallel capacitor device embodiment 1 another kind of structural representation of this dual overvoltage protection;
Fig. 3 is parallel capacitor device embodiment 2 structural representations of this dual overvoltage protection.
Number in the figure is: overvoltage damping device 1, reactor 2, lightning arrester 3, discharge counter 4, capacitor group 5.
(5) embodiment
The parallel capacitor device embodiment 1 of this dual overvoltage protection as shown in Figure 1, comprise capacitor group 5 and the reactor 2 of connecting with it, reactor 2 is connected on the mains side of capacitor group 5, and one of lightning arrester 3 terminates between reactor 2 and the capacitor group 5, the other end ground connection of lightning arrester 3; Described reactor 2 also is parallel with overvoltage damping device 1, and overvoltage damping device 1 is in series by resistor and gap.Also be in series with discharge counter 4 in the loop of overvoltage damping device 1.This routine overvoltage damping device 1 is 300mm with the distance of reactor 2.
As shown in Figure 2, an end of the lightning arrester 3 in this example also can be connected on the mains side of reactor 2, and discharge counter 4 is serially connected in the earth terminal of lightning arrester 3.
The parallel capacitor device embodiment 2 of this dual overvoltage protection as shown in Figure 3, its reactor 2 be connected on capacitor group 5 by neutral point side, one of described lightning arrester 3 terminates at the mains side of capacitor group 5, its earth terminal is in series with discharge counter 4.Reactor 2 also is parallel with overvoltage damping device 1, also is in series with discharge counter 4 in the loop of overvoltage damping device 1.This overvoltage damping device 1 is 800mm with the distance of reactor 2.Other structure is identical with embodiment 1.
Claims (5)
1.[claim 1] a kind of parallel capacitor device of dual overvoltage protection comprises the capacitor group (5) and the reactor (2) of series connection with it, a termination of reactor (2) or capacitor group (5) has lightning arrester (3), the other end ground connection of lightning arrester (3); It is characterized in that: described reactor (2) also is parallel with overvoltage damping device (1), and overvoltage damping device (1) mainly is in series by resistor and gap.
2.[claim 2] parallel capacitor device of dual overvoltage protection according to claim 1, it is characterized in that: described reactor (2) is connected on the mains side of capacitor group (5), and one of described lightning arrester (3) terminates at an end of reactor (2).
3.[claim 3] parallel capacitor device of dual overvoltage protection according to claim 1; it is characterized in that: described reactor (2) is connected on the neutral point side of leaning on of capacitor group (5), and one of described lightning arrester (3) terminates at the mains side of capacitor group (5).
4.[claim 4] according to the parallel capacitor device of each described dual overvoltage protection in the claim 1 to 3, it is characterized in that: in the loop of described overvoltage damping device (1) and/or the earth terminal of lightning arrester (3) also be in series with discharge counter (4).
5.[claim 5] according to the parallel capacitor device of each described dual overvoltage protection in the claim 1 to 3, it is characterized in that: described overvoltage damping device (1) is 125～1800mm with the distance of reactor (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008203006832U CN201199632Y (en) | 2008-05-07 | 2008-05-07 | Parallel capacitor apparatus with dual over-voltage protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008203006832U CN201199632Y (en) | 2008-05-07 | 2008-05-07 | Parallel capacitor apparatus with dual over-voltage protection |
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| Publication Number | Publication Date |
|---|---|
| CN201199632Y true CN201199632Y (en) | 2009-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008203006832U Expired - Fee Related CN201199632Y (en) | 2008-05-07 | 2008-05-07 | Parallel capacitor apparatus with dual over-voltage protection |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102545233A (en) * | 2010-12-13 | 2012-07-04 | 河南省电力勘测设计院 | Compact type parallel capacitor complete equipment |
| CN102570482A (en) * | 2012-02-13 | 2012-07-11 | 绍兴电力局 | High voltage parallel capacitor device based on neutral point direct grounding mode |
| CN102738774A (en) * | 2012-06-06 | 2012-10-17 | 河南省电力公司信阳供电公司 | Overvoltage protection capacitor device |
| CN103532123A (en) * | 2013-10-29 | 2014-01-22 | 国家电网公司 | Protective circuit for switching over-voltage protection of dry air reactor |
| CN107069689A (en) * | 2017-05-18 | 2017-08-18 | 安徽天电气技术股份有限公司 | Switch limits device of restriking |
| CN109412130A (en) * | 2017-08-15 | 2019-03-01 | 平高集团有限公司 | A kind of mechanical dc circuit breaker and its charge circuit |
| CN111130081A (en) * | 2020-04-01 | 2020-05-08 | 广东电网有限责任公司佛山供电局 | System and method for reducing electric energy loss by additionally arranging current-limiting reactor bypass switch |
| CN111884233A (en) * | 2020-07-06 | 2020-11-03 | 武汉理工大学 | Overcurrent and overvoltage suppression system for parallel capacitor |
-
2008
- 2008-05-07 CN CNU2008203006832U patent/CN201199632Y/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102545233A (en) * | 2010-12-13 | 2012-07-04 | 河南省电力勘测设计院 | Compact type parallel capacitor complete equipment |
| CN102570482A (en) * | 2012-02-13 | 2012-07-11 | 绍兴电力局 | High voltage parallel capacitor device based on neutral point direct grounding mode |
| CN102738774A (en) * | 2012-06-06 | 2012-10-17 | 河南省电力公司信阳供电公司 | Overvoltage protection capacitor device |
| CN103532123A (en) * | 2013-10-29 | 2014-01-22 | 国家电网公司 | Protective circuit for switching over-voltage protection of dry air reactor |
| CN103532123B (en) * | 2013-10-29 | 2016-02-10 | 国家电网公司 | A kind of protective circuit for dry-type air-core reactor switching overvoltage protection |
| CN107069689A (en) * | 2017-05-18 | 2017-08-18 | 安徽天电气技术股份有限公司 | Switch limits device of restriking |
| CN109412130A (en) * | 2017-08-15 | 2019-03-01 | 平高集团有限公司 | A kind of mechanical dc circuit breaker and its charge circuit |
| CN109412130B (en) * | 2017-08-15 | 2021-12-17 | 平高集团有限公司 | Mechanical direct current breaker and charging circuit thereof |
| CN111130081A (en) * | 2020-04-01 | 2020-05-08 | 广东电网有限责任公司佛山供电局 | System and method for reducing electric energy loss by additionally arranging current-limiting reactor bypass switch |
| CN111130081B (en) * | 2020-04-01 | 2020-07-14 | 广东电网有限责任公司佛山供电局 | System and method for reducing electric energy loss by additionally arranging current-limiting reactor bypass switch |
| CN111884233A (en) * | 2020-07-06 | 2020-11-03 | 武汉理工大学 | Overcurrent and overvoltage suppression system for parallel capacitor |
| CN111884233B (en) * | 2020-07-06 | 2024-01-30 | 武汉理工大学 | Overcurrent and overvoltage suppression system for parallel capacitor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090225 Termination date: 20170507 |