CN101923955A - High-reliability integrated capacitor - Google Patents
High-reliability integrated capacitor Download PDFInfo
- Publication number
- CN101923955A CN101923955A CN 201010274174 CN201010274174A CN101923955A CN 101923955 A CN101923955 A CN 101923955A CN 201010274174 CN201010274174 CN 201010274174 CN 201010274174 A CN201010274174 A CN 201010274174A CN 101923955 A CN101923955 A CN 101923955A
- Authority
- CN
- China
- Prior art keywords
- capacitor
- integrated
- reliability
- unit
- integrated capacitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention relates to a high-reliability integrated capacitor which comprises a plurality of capacitor units and is characterized in that one or more capacitor units form a capacitor bridge arm, four bridge arms are respectively Z1, Z2, Z3 and Z4, the four capacitor bridge arms are in bridge differential connection, and the alternating-current capacitive reactance Zc meets the following relation: Zc1*Zc3=Zc2*Zc4. The invention greatly improves the level of detection and protection of faults and well solves the problem that differential protection sensitivity and reliability can not meet the requirements because a large-capacity integrated capacitor, especially a large-capacity internal fuse integrated capacitor, adopts open triangle voltage or phase voltage. Because the bridge differential protection has high sensitivity and is reliable, the operational reliability and safety of the integrated capacitor are multiplied.
Description
Technical field
The present invention relates to a kind of capacitor, especially a kind of high reliability integrated capacitor that adopts the capacitor unit formation of many connection in series-parallel component structure with the protection of bridge difference formula and other protected modes.
Background technology
Integrated capacitor is made up of a plurality of capacitor unit connection in series-parallel at present.The capacitor element of fuse constitutes by capacitor element or in having in capacitor unit inside, a plurality of capacitor elements or have in the capacitor element of fuse in parallel mutually, constitutes an element string section, string section puts little shell and just constitutes capacitor unit.Capacitor unit carries out connection in series-parallel mutually and connects, and constitutes a capacitor core body and packs in the large tank, and capacitor unit directly is immersed in the insulating oil, by sleeve pipe with power supply access promptly becoming integrated capacitor.In this structure because of element string section only in the capacitor unit, and limited the capability value of capacitor unit greatly, as adopt the mode of multi-parallel element string section to increase the capacitor unit capacity, can cause capacity cell string hop count amount in parallel excessive, it is excessive and cut-off failure that fuse cut-offs energy in easily causing in interrupting process, and integrated capacitor is damaged.Moreover, because the capacitor unit capacity is little, make the capacitor unit quantity in the big capacity integrated capacitor too much, outside connection in series-parallel line complexity, the insulation processing difficulty arranges between unit and the unit that closely the heat radiation difficulty easily causes integrated capacitor to damage.Moreover when the capacitor core body that this connection in series-parallel connects was used for the 10kV system, its framework directly was connected with the case shell, and was used for 35kV and when above, and then its framework is normally to the insulation of case shell, and capacitor unit is seated on the insulated platform.This connection features and single insulated platform structure make the single-phase capacity maximum of integrated capacitor accomplish the 6680kvar capacity only, otherwise the blasting energy of capacitor device will must be less than 15kW.s above 15kW.s(standard code device blasting energy), because when certain capacitor element fault of capacitor unit, intact capacitor element can inject energy to the fault capacitor element, can make the generation explosion of fault capacitor unit and enlarge fault after energy surpasses 15kW.s, it is exactly that this reason causes that the big capacity integrated capacitor of present operation often has the capacitor unit bursting accident.
Another kind be loaded in the big case shell constitute Tank Capacitors be: do not have interior fuse, after capacitor element connection in series-parallel connection, the capacitor element that connects directly is loaded in the big case shell, and the capacitor element that connects directly is soaked in the insulating oil, by sleeve pipe power supply is inserted.This Tank Capacitors is not because capacitor element has little shell protection and separation; as long as there is a capacitor element to damage; whole Tank Capacitors is just damaged; for guaranteeing that capacitor element does not in use damage as far as possible; have to adopt the low field intensity design; increase the consumption material amount of unit capacity (kvar) greatly, be unfavorable for the capacitor technology progress.
The integrated capacitor fault detects and in time cuts off at present; main open delta protection and the phase voltage difference of adopting protected; all not enough to these two kinds protections of big capacity integrated capacitor sensitivity; can not in time detect and excise when usually causing the integrated capacitor fault; cause the integrated capacitor fault to enlarge, even exploding and firing.
Therefore, be necessary the integrated capacitor that provides a kind of reliability high, to overcome above-mentioned shortcoming.
Summary of the invention
The purpose of this invention is to provide a kind of high-reliability integrated capacitor that the error protection improved is arranged; can in time detect and excise when making the integrated capacitor fault; avoid causing fault to enlarge; guarantee integrated capacitor in less, controlled damage range, just can make integrated capacitor in time out of service.
Further aim of the present invention is that the connected mode of change capacitor element string section and capacitor unit makes big capacity integrated capacitor overcome insulation, heat radiation difficulty, the defective of damaging easily.
Technical scheme of the present invention is: high-reliability integrated capacitor, it comprises a plurality of capacitor units, it is characterized in that: constitute a capacitor brachium pontis by one or more capacitor units, 4 brachium pontis are respectively Z1, Z2, Z3, Z4,4 capacitor brachium pontis become bridge difference formula to connect, and it exchanges capacitive reactance Zc and satisfies Zc1 * Zc3=Zc2 * Zc4.
Aforesaid high-reliability integrated capacitor is characterized in that: described capacitor unit has the element string section of a plurality of series connection.
Aforesaid high-reliability integrated capacitor, it is characterized in that: capacitor unit is installed on the platform of a plurality of mutually insulateds, a plurality of capacitor units are in parallel to constitute one sub section, form capacitor block by the mutual series connection of a plurality of son sections, a plurality of capacitor blocks formation in parallel capacitor brachium pontis, the intermediate potential of capacitor block is connected with the platform at place.
The invention has the beneficial effects as follows:
1; for making integrated capacitor that a perfect error protection be arranged; guarantee that capacitor is less; in the controlled damage range; just can make integrated capacitor in time out of service; avoid the capacitor fault to enlarge; even exploding and firing; the present invention proposes integrated capacitor bridge-type current differential protection; improved detecting and the protection level of fault greatly; solved big capacity integrated capacitor well; the fuse integrated capacitor adopts the problem that open delta voltage or the sensitivity of phase voltage differential protection and reliability can not meet the demands in the particularly big capacity; because the protection of bridge difference is highly sensitive; reliably, the operational reliability and the fail safe of integrated capacitor have been increased exponentially.
2, because the internal capacitor element string section of capacitor unit is to adopt a plurality of string section cascaded structures, but not single string segment structure, therefore voltage height, the capacity of capacitor unit are big, thereby make set capacitor arrangement size littler compacter, make the quantity of integrated capacitor interior capacitor unit few, connecting line is simple, has improved insulating reliability greatly.
3, internal fault protection: according to the capacity of integrated capacitor device; select internal connection line and insulated platform number; the electric physical segmentation of cutting apart with insulated platform that guarantees integrated capacitor inside makes the integrated capacitor blasting energy less than 15kW.s, reaches the purpose that improves integrated capacitor device security of operation and reliability.
The present invention improves from outside relaying protection collocation method and internal structure, reaches the purpose of the security reliability that improves integrated capacitor.
Description of drawings
Fig. 1 .1 is the integrated electric structure of container schematic diagram of the embodiment of the invention one.
Fig. 1 .2 is the physical segmentation schematic diagram of Fig. 1 .1.
Fig. 1 .3 is that sleeve pipe is arranged schematic diagram.
Fig. 1 .4 is the electrical schematic diagram of Fig. 1 .1.
Fig. 2 .1 is the integrated electric structure of container schematic diagram of the embodiment of the invention two.
Fig. 2 .2 is the physical segmentation schematic diagram of this Fig. 2 .1.
Fig. 2 .3 is that sleeve pipe is arranged schematic diagram.
Fig. 2 .4 is the electrical schematic diagram of Fig. 2 .1.
Fig. 3 .1 is the capacitor unit structural representation that interior fuse is arranged of the present invention.
Fig. 3 .2 is the capacitor unit structural representation of fuse in the nothing of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
The explanation of mark among Fig. 1 .1: 1-capacitor unit, 2-platform, 3-insulator, 4-large tank, 5-sleeve pipe, 8-connecting line, 9.1 and 9.2-intermediate potential connecting line, 10-head end lead-in wire, 11.1 and 11.2-middle part lead-in wire, 12-end leads.
The explanation of mark among Fig. 1 .3: sleeve pipe L, X, U, V.
The explanation of mark among Fig. 1 .4: capacitor brachium pontis Z1, Z2, Z3, Z4, central point position M, 13-section.
The explanation of mark among Fig. 3 .1: fuse in the 6-capacitor element, 7-, 14-full packaged insulation materials, 15-unit sleeve pipe, 16-unit head end lead-in wire, 17-unit tail end lead-in wire, 18-element string section, the little shell of 19-.
The structure of the embodiment of the invention one is shown in Fig. 1 .1, and its electric principle is shown in Fig. 1 .4.
The high-reliability integrated capacitor of present embodiment, it comprises 48 capacitor units 1, it is characterized in that: constitute a capacitor brachium pontis by 12 capacitor units 1,4 brachium pontis are respectively Z1, Z2, Z3, Z4,4 capacitor brachium pontis become bridge difference formula to connect, and it exchanges capacitive reactance Zc and satisfies Zc1 * Zc3=Zc2 * Zc4.
Described in the present embodiment capacitor unit 1 has only Fig. 1 .4).Capacitor unit 1 among Fig. 1 .4, its internal structure are element string section 18(Fig. 3 .1), expression be element 6 parallel connections of fuse 7 in a plurality of bands.
Shown in Fig. 1 .1, the high-reliability integrated capacitor of the embodiment of the invention one is that capacitor unit 1 is installed in the platform 2 on request, again capacitor unit 1 usefulness connecting line 8 is carried out connection in series-parallel by certain requirement, or carry out the segmentation and regionalization connection in series-parallel, to satisfy explosion energy and be not more than 15kW.s electric the cutting apart that guarantees capacitor device, must have the intermediate potential M of a capacitor block to be connected on the platform 2 with intermediate potential connecting line 9.1 or 9.2 in the capacitor block that capacitor unit 1 is formed in each platform 2, whole platform 2 is again with insulator 3 support of insulating.Platform 2 can become a platform 2 by the capacity setting of capacitor device, or the platform 2 of a plurality of mutually insulateds, platform 2 also can be by the requirement of blasting energy, vertically by the insulator support of insulating, vertically be divided into the platform 2 of 2 or a plurality of mutually insulateds, the insulation that also can be laterally carry out 2 on platform with insulator connects, laterally being divided into the platform 2 of 2 or a plurality of mutually insulateds, to satisfy the physical isolation requirement of the blasting energy on each platform 2.When guaranteeing certain capacitor fault, intact capacitor injects energy less than 15kW.s to fault electric capacity, makes the fault capacitor can explosion not take place and enlarges fault.After the installation of finishing all capacitor units 1 like this connects, be installed in the large tank 4 by insulator 3 together with the whole capacitor device frame of platform 2, capacitor unit 1 directly is immersed in the insulating oil.
Series-parallel head end lead-in wire 10 of capacitor unit 1; middle part lead-in wire 11.1 and 11.2 and end leads 12 draw through four sleeve pipes 5; promptly constituted high-reliability integrated capacitor; when middle part lead-in wire 11.1 and 11.2 is drawn by two sleeve pipes of U, V with regard to 4 sleeve structures of pie graph 1.3; just constitute the wiring of bridge-type capacitor for voltage protection, be beneficial to the error protection level that improves the integrated electric container.
Each capacitor element 6 interior fuse 7(Fig. 3 .1 that can be connected in series); interior fuse (Fig. 3 .2) also can not be connected in series; in capacitor element 6 is connected in series during fuse 7; just constituted internal fuse protected integrated capacitor; and in not being connected in series during fuse, just constituted do not have in the fuse integrated capacitor.
The used capacitor unit 1 of the present invention can resemble ordinary set formula capacitor sample and have only an element string section 18, but for avoiding single string section easily to puncture and improving reliability requirement, generally is to constitute (Fig. 3 .1 by a plurality of element string sections 18; Fig. 3 .2), the benefit of doing like this is: the capacitor unit capacity is big, voltage is high, and when constituting integrated capacitor, back panel wiring is simple, and lead-in wire is few, the reliability height; Another that do is helpful like this is that integrated capacitor can be produced basically identical with the ordinary capacitor unit with the production of capacitor unit 1, and production cost is reduced.
The structure of the embodiment of the invention two is shown in Fig. 2 .1, and its electric principle is shown in Fig. 2 .4.
Shown in Fig. 2 .1, as the u at sleeve pipe U, V, 2 inside of v are connected, 3 sleeve structures of drawing Fig. 2 .3 that just constitutes embodiment two through sleeve pipe 5 by a middle part lead-in wire 11.1.Also can be by the u among Fig. 1 .3,2 outside connections of v, constitute the integrated capacitor that the phase voltage difference is protected wiring, just constituted the third embodiment of the present invention.
The embodiment of capacitor unit is referring to Fig. 3 .1 and 3.2.Fig. 3 .1, there is the capacitor unit 1 of interior fuse that the element string section 18 of a plurality of series connection is arranged, according to voltage request several element string sections 18(present embodiment of connecting is three), hold into an integral body by full packaged insulation materials 14 again, the little shell 19 of packing into, the unit of its capacitor go between from beginning to end and 16,17 draw through unit sleeve pipe 15.
Fig. 3 .2 is the capacitor unit 1 of fuse in not having.
Adopt technical scheme of the present invention, can accomplish 20,000 kvar at present greater than 6680kvar, and safe and reliable.
The demonstration that the foregoing description is just done for the ease of understanding thought of the present invention, claimed scope of the present invention is not subjected to the restriction of embodiment, and every variation of doing according to the technological thought of summary of the invention part is all in the scope of protection of present invention.
Claims (3)
1. high-reliability integrated capacitor, it comprises a plurality of capacitor units, it is characterized in that: constitute a capacitor brachium pontis by one or more capacitor units, 4 brachium pontis are respectively Z1, Z2, Z3, Z4,4 capacitor brachium pontis become bridge difference formula to connect, and it exchanges capacitive reactance Zc and satisfies Zc1 * Zc3=Zc2 * Zc4.
2. high-reliability integrated capacitor as claimed in claim 1 is characterized in that: described capacitor unit has the element string section of a plurality of series connection.
3. high-reliability integrated capacitor as claimed in claim 1 or 2, it is characterized in that: capacitor unit is installed on the platform of a plurality of mutually insulateds, a plurality of capacitor units are in parallel to constitute one sub section, form capacitor block by the mutual series connection of a plurality of son sections, a plurality of capacitor blocks formation in parallel capacitor brachium pontis, the intermediate potential of capacitor block is connected with the platform at place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010274174 CN101923955A (en) | 2010-09-07 | 2010-09-07 | High-reliability integrated capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010274174 CN101923955A (en) | 2010-09-07 | 2010-09-07 | High-reliability integrated capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101923955A true CN101923955A (en) | 2010-12-22 |
Family
ID=43338807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010274174 Pending CN101923955A (en) | 2010-09-07 | 2010-09-07 | High-reliability integrated capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101923955A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103441513A (en) * | 2013-08-14 | 2013-12-11 | 合容电气股份有限公司 | Assembling high-voltage high-capacity power capacitor |
| CN108806984A (en) * | 2018-04-27 | 2018-11-13 | 中国电力科学研究院有限公司 | The anti-blasting method of compact type shunt capacitor for extra-high voltage |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101170254A (en) * | 2007-09-21 | 2008-04-30 | 四川电力试验研究院 | Unbalanced protection method and device for high-voltage serial connection compensation capacitor group |
| CN201199631Y (en) * | 2008-04-24 | 2009-02-25 | 国家电网公司 | Double-bridge difference power capacitor apparatus |
| CN201812681U (en) * | 2010-09-07 | 2011-04-27 | 武汉电联电力电气技术有限公司 | High-reliability integrated capacitor |
-
2010
- 2010-09-07 CN CN 201010274174 patent/CN101923955A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101170254A (en) * | 2007-09-21 | 2008-04-30 | 四川电力试验研究院 | Unbalanced protection method and device for high-voltage serial connection compensation capacitor group |
| CN201199631Y (en) * | 2008-04-24 | 2009-02-25 | 国家电网公司 | Double-bridge difference power capacitor apparatus |
| CN201812681U (en) * | 2010-09-07 | 2011-04-27 | 武汉电联电力电气技术有限公司 | High-reliability integrated capacitor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103441513A (en) * | 2013-08-14 | 2013-12-11 | 合容电气股份有限公司 | Assembling high-voltage high-capacity power capacitor |
| CN108806984A (en) * | 2018-04-27 | 2018-11-13 | 中国电力科学研究院有限公司 | The anti-blasting method of compact type shunt capacitor for extra-high voltage |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101944719B (en) | Detection system and detection method of capacitance sleeve pipe | |
| CN201812681U (en) | High-reliability integrated capacitor | |
| JP2008537466A (en) | Capacitor module and its operation method | |
| CN101923955A (en) | High-reliability integrated capacitor | |
| CN202771966U (en) | Intelligent power capacitor | |
| CN205319004U (en) | Vacuum rubber soaks fibre explosion -proof type oil paper capacitance graded bushing | |
| CN104953553B (en) | A kind of dry type metallization film capacitor air-sensitive protection device and method | |
| CN103558516A (en) | Method of testing alternating current voltage resistance performance of multi-core cable | |
| CN102468052B (en) | High-voltage film capacitor with inductive series structure and manufacture method | |
| CN109342901B (en) | Wall bushing with insulation state on-line monitoring function and working method thereof | |
| CN103336196B (en) | A kind of measuring method of oil/gas sleeve pipe outgoing-line type transformer | |
| CN202586280U (en) | An intelligent high-voltage parallel capacitor and a high-voltage automatic reactive compensator | |
| CN203607250U (en) | Capacitor | |
| CN205789442U (en) | A kind of Novel DC sleeve pipe | |
| CN103217201B (en) | The primary and secondary capacitance type sensor of outer ring structure | |
| CN201156472Y (en) | Electric power capacitor | |
| CN108037385A (en) | A kind of substep test method for self healing capacitor self-healing failure protective value test | |
| CN202502907U (en) | Shunt capacitor apparatus for power system | |
| CN207148194U (en) | A kind of rural power grids transformer | |
| CN103900736B (en) | Fault handling method with broken point displayed through temperature of thermal resistor | |
| CN104155560B (en) | Out-of-balance current protection method and system for II wiring capacitor group with inner fuse wires | |
| CN207801459U (en) | A kind of device of monitoring reactor operating condition | |
| CN101964253A (en) | Unthreaded terminal mechanical explosion-proof dry type capacitor | |
| CN213519620U (en) | Explosion-proof set formula condenser | |
| CN108459254B (en) | Pretreatment method for aging test of insulating paper for power equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20101222 |