CN201860119U - Integrated multi-loop low-voltage parallel-connection power capacitor - Google Patents
Integrated multi-loop low-voltage parallel-connection power capacitor Download PDFInfo
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- CN201860119U CN201860119U CN2010206091514U CN201020609151U CN201860119U CN 201860119 U CN201860119 U CN 201860119U CN 2010206091514 U CN2010206091514 U CN 2010206091514U CN 201020609151 U CN201020609151 U CN 201020609151U CN 201860119 U CN201860119 U CN 201860119U
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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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- 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
- Y02E40/40—Arrangements for reducing harmonics
Abstract
The utility model discloses an integrated multi-loop low-voltage parallel-connection power capacitor, which relates to multi-loop cascading low-voltage power capacitors suitable for single-phase, three-phase and mixed electric occasions and comprises an integrated cascading capacitor group and an intelligent controller. Zero-crossing switching intelligent switches are connected onto a circuit among capacitor bodies in series and connected with the intelligent controller, a plurality of delta connection unit circuits and at least one star connection unit circuit are parallelly arranged in the same outer casing of the capacitor group, power cables of all circuits are led out of an upper cover to be respectively connected onto wire outlet terminals of the upper cover. A split-phase compensation power loop is composed of led-out zero wires of the centers of the star connection unit circuits and comprises a total compensation power loop, a single-phase compensation power loop and a mixed compensation power loop. The integrated multi-loop low-voltage parallel-connection power capacitor adopts the multi-loop cascading capacitor group and intelligent control, is suitable for single-phase, three-phase and mixed electric occasions, and is complete in function, low in loss and long in service life.
Description
Technical field
The utility model belongs to the power capacitor technical field, is specifically related to a kind of multiloop intelligent compensation power capacitor.
Background technology
Modern observing and controlling that the intelligence capacitor is integrated, power electronics, network communication, automation control, advanced technologies such as power capacitor.Changed traditional reactive power compensator controller technology that falls behind and the mechanical contactor that falls behind or electromechanical integral switch switching technology as switched capacitor, changed the bulky and heavy tactic pattern of traditional reactive power compensator, thereby it is better to make low-pressure reactive compensation equipment of new generation have a compensation effect, volume is littler, power consumption is lower, price is more honest and cleaner, it is more to save cost, use more flexible, safeguard convenient, longer service life, the characteristics that reliability is higher have adapted to the requirements at the higher level of modern power network to reactive power compensation.
The intelligent powerless compensation capacitor is for improving the output power factor, improve electrical network efficient a kind of high efficiency solution is provided, but the intelligent capacitor of prior art still can not be fully up to expectations on versatility.China Patent No. ZL200920038107.X for example, name is called the utility model patent of " the intelligent capacitor of band harmonic protection ", and it comprises single-chip microcomputer, operational amplifier, ON-OFF control circuit, switch, capacitor and AD converter; Described single-chip microcomputer is connected with ON-OFF control circuit, switch and capacitor successively, and described ON-OFF control circuit comprises the 6th triode, two zero passage optocouplers, the 7th triode, relay, electric capacity, magnetic latching relay, two thyristors; Described switching circuit comprises that the input of voltage and a voltage exports, and draws two ends respectively and be connected with described single-chip microcomputer; After the 6th triode conducting that base stage is connected with single-chip microcomputer, the zero passage optocoupler conducting of two parallel connections that are connected with the 6th transistor collector, when voltage output zero passage, the thyristor conducting of two parallel connections; The base stage of the 7th triode is connected with single-chip microcomputer, and collector electrode is connected back series connection magnetic latching relay with relay and electric capacity.One class of this intelligent capacitor only is only applicable to a kind of electrical network, for single-phase, three-phase and mix the electricity consumption occasion, uses this intelligent capacitor and just seems sometimes and can not adapt to that its versatility is relatively poor in other words.
Summary of the invention
The utility model technical issues that need to address are, overcome the defective of the intelligent capacitor versatility difference of prior art, provide a kind of and be applicable to single-phase, three-phase and mix the electricity consumption occasion, and the multiloop staged low voltage power capacitor of the bigger electricity consumption occasion of power factor of electric network fluctuation.
The purpose of this utility model is achieved by following technical proposals: a kind of aggregation type multiloop low pressure The parallel power condenser, comprise integrated staged capacitor device group, above capacitor group body, be provided with and cover shell, be provided with miniature circuit breaker in the lid shell, CPU microcomputer-recognized intelligent controller, current transformer, temperature controller, man-machine liquid crystal display interface and RS485 communication interface, CPU microcomputer-recognized intelligent controller is connected with man-machine liquid crystal display interface with the logical number interface of RS485 respectively, be in series with the operating passing zero intelligent switch between miniature circuit breaker and the capacitor body on the circuit, the operating passing zero intelligent switch links to each other with CPU microcomputer-recognized intelligent controller, in the same shell of described capacitor group, be provided with several delta-connection element circuits and at least one star connection element circuit side by side, all include capacitor and described intelligent switch in each element circuit, the power line of each circuit is drawn loam cake and be connected on the outlet terminal that is located at tops; Draw the electric power loop that zero line constitutes phase splitting compensation from the central point of star connection unit, the electric power loop of described phase splitting compensation comprises common benefit electric power loop at three-phase circuit, at the single-phase offset supply loop and the mixed compensation electric power loop of single phase circuit.
As preferably, describedly mend the structure that electric power loop adopts the operating passing zero schemes of logical two controls altogether.The described capacitor of mending altogether is the unit of adorning several delta connections in same shell, and each element circuit is all adopted logical two control switching schemes; Described one is logical for there being a line circuit directly to connect, and described two controls are to have quarter-phase circuit to be made as controlled device in three-phase power circuit; Described operating passing zero is that positive peak or the negative peak that intelligent switch is selected in the supply power voltage sine wave opened switched capacitor constantly, operating passing zero can be avoided transient process most possibly, because about 90 ° of the leading suffered voltage of thyristor switch electric current, the switching of capacitor always can cause that transient state shoves, this electric current can switching have charged when the voltage of capacitor reaches peak value in other words near zero the time at switching voltage capacitor minimized, thereby but realize switched capacitor.
As preferably, the structure of the operating passing zero scheme of a logical control is adopted in described single-phase offset supply loop.A described control is that the circuitry phase in the single phase poaer supply circuit is controlled setting, and single-phase compensation condenser can be formed two and above a plurality of single-phase electricity containers unit.
As preferably, the control line of described one logical two controls and a logical control is connected with operating passing zero intelligent switch output respectively.
As preferably, described operating passing zero intelligent switch circuit is in series with the little reactor of current limliting.The little reactor of described current limliting can play the thyristor safe operation of the transient state component protection of restriction electric current as the main element of intelligent switch, makes thyristor can reach theoretic unlimited switch, also slightly plays the harmonic effect simultaneously.
As preferably, described intelligent compensation control module is provided with light load throw in-of oscillation locking device; Described surge guard is provided with a stagnant loop voltag exactly, and intelligence control system is not sent the switching action command in the loop voltag that stagnates; Be provided with light load throw in-of oscillation locking device and can during less than the capacity of a minimum group capacitor, avoid overcompensation, cause the compensation throw in-of oscillation to such an extent as to prevent repeatedly switching at the required compensation capacity of circuit.
The integrated multiple-loop low voltage power capacitor cooperates the intelligent compensation control module, form integrated multipath staged intelligence capacitor, the low-pressure side that is used for 1.0KV and following industrial frequency AC distribution system transformer, with intelligence control system use in parallel, system's reactive power is detected automatic tracking and compensating automatically with inductive load.Be attached to the outdoor compensation of low-pressure side that intelligence control system is installed in transformer; Also can be loaded on and make compensation usefulness in the low-voltage complete cabinet, particularly suitable for unattended electric substation.
The beneficial effects of the utility model are:
1. be provided with the capacitance group of multiloop staged configuration and adopt Based Intelligent Control, can be applicable to single-phase, three-phase and mix the electricity consumption occasion, and the bigger electricity consumption occasion of power factor of electric network fluctuation;
2. integrated multiple-loop structure, volume is little, function is complete, capacity is big, loss is low, reliability is high, the life-span is long;
3. can be loaded on and make compensation usefulness in the low-voltage complete cabinet, especially be suitable for unattended electric substation.
Description of drawings
Fig. 1 is the three-phase circuit offset supply loop structure schematic diagram of a kind of embodiment of the utility model;
Fig. 2 is that the single phase circuit of a kind of embodiment of the utility model is mended the electric power loop structural representation altogether;
Fig. 3 is that the star connection circuit of a kind of embodiment of the utility model is mended the electric power loop structural representation altogether;
Fig. 4 is switch and the capacitor connection diagram of a kind of embodiment of the utility model.
Among the figure:
1. capacitor; 2. intelligent switch; 3. intelligent controller; 4. phase terminal; 5. zero terminal; 6. shell; 7. thyristor; 8. little reactor.
Embodiment
Below in conjunction with accompanying drawing and specific embodiments the utility model is further described.
Embodiment 1: as Fig. 1～shown in Figure 3, a kind of aggregation type multiloop low pressure The parallel power condenser, comprise integrated staged capacitor device group 1, above capacitor group body, be provided with and cover shell, be provided with miniature circuit breaker in the lid shell, CPU microcomputer-recognized intelligent controller, current transformer, temperature controller, man-machine liquid crystal display interface and RS485 communication interface, CPU microcomputer-recognized intelligent controller is connected with man-machine liquid crystal display interface with the logical number interface of RS485 respectively, be in series with the operating passing zero intelligent switch between miniature circuit breaker and the capacitor body on the circuit, the operating passing zero intelligent switch links to each other with CPU microcomputer-recognized intelligent controller 3, same shell at capacitor is provided with ten delta-connection element circuits and a star connection element circuit for 6 li side by side, all contain capacitor and described intelligent switch 2 in each element circuit, the power line of each circuit is drawn loam cake and be connected on the phase terminal 4 and zero terminal 5 that is located at tops; Draw the electric power loop that zero line constitutes phase splitting compensation from the central point of star connection unit, the electric power loop of described phase splitting compensation comprises common benefit electric power loop at three-phase circuit, at the single-phase offset supply loop and the mixed compensation electric power loop of single phase circuit.
The structure of the operating passing zero scheme of a logical control is adopted in single-phase offset supply loop, and the connection of intelligent switch as shown in Figure 4.The thyristor 7 of two unidirectional conductings among Fig. 4 is connected to the inverse parallel structure, and the thyristor control end is connected with CPU microcomputer-recognized intelligent controller, is connected in series a little reactor 8 in the circuit again; The capacity of reactor 8 is chosen according to capacitor 1 amount of capacity, and the reactance of establishing reactor 8 is X
L, the capacitive reactance of capacitor 1 is X
C, make n
2=︱ X
C︱/︱ X
L︱ chooses n=4～5.
Mend the structure of the operating passing zero schemes of electric power loop employing one logical two controls altogether.
The control line of one logical two controls and a logical control is connected in series with the operating passing zero intelligent switch respectively.
The intelligent compensation control module is provided with light load throw in-of oscillation locking device; Its key is that a stagnant loop voltag is set, and intelligence control system is not sent the switching action command in the loop voltag that stagnates.
If but switched capacitor is combined with the may command reactor is in parallel, then can be by the electric current in switched capacitor and the control reactor, the smooth adjustment of realization from the capacity current to the inductance current, the parallel connection of thyristor-controlled reactor and thyristor switchable capacitor can reach Static Var Compensator.
Described intelligent capacitor is provided with the capacitance group that the multichannel capacity becomes the staged configuration, can insert the most rational capacitance according to circuit load situation automatic switching, avoid taking place undercompensation, be particularly suitable for being connected on the low-voltage bus bar of electric substation and on user's distribution board bus of big power consumption, in order to reduce the reactive load of electrical network and user transformers and supply line, realize economical operation.
Claims (6)
1. aggregation type multiloop low pressure The parallel power condenser, comprise integrated staged capacitor device group, above capacitor group body, be provided with and cover shell, be provided with miniature circuit breaker in the lid shell, CPU microcomputer-recognized intelligent controller, current transformer, temperature controller, man-machine liquid crystal display interface and RS485 communication interface, CPU microcomputer-recognized intelligent controller is connected with man-machine liquid crystal display interface with the logical number interface of RS485 respectively, be in series with the operating passing zero intelligent switch between miniature circuit breaker and the capacitor body on the circuit, the operating passing zero intelligent switch links to each other with CPU microcomputer-recognized intelligent controller, it is characterized in that, in the same shell of described capacitor group, be provided with several delta-connection element circuits and at least one star connection element circuit side by side, all include capacitor and described intelligent switch in each element circuit, the power line of each circuit is drawn loam cake and be connected on the outlet terminal that is located at tops; Draw the electric power loop that zero line constitutes phase splitting compensation from the central point of star connection unit, the electric power loop of described phase splitting compensation comprises common benefit electric power loop at three-phase circuit, at the single-phase offset supply loop and the mixed compensation electric power loop of single phase circuit.
2. aggregation type multiloop low pressure The parallel power condenser according to claim 1 is characterized in that, described structure of mending the operating passing zero schemes of electric power loop employing one logical two controls altogether.
3. aggregation type multiloop low pressure The parallel power condenser according to claim 1 is characterized in that, the structure of the operating passing zero scheme of a logical control is adopted in described single-phase offset supply loop.
4. according to claim 2 or 3 described aggregation type multiloop low pressure The parallel power condenser, it is characterized in that the control line of described one logical two controls and a logical control is connected with operating passing zero intelligent switch output respectively.
5. according to claim 1 or 2 or 3 described aggregation type multiloop low pressure The parallel power condenser, it is characterized in that described operating passing zero intelligent switch circuit is in series with the little reactor of current limliting.
6. according to claim 1 or 2 or 3 described aggregation type multiloop low pressure The parallel power condenser, it is characterized in that described intelligent compensation control module is provided with light load throw in-of oscillation locking device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206091514U CN201860119U (en) | 2010-11-17 | 2010-11-17 | Integrated multi-loop low-voltage parallel-connection power capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206091514U CN201860119U (en) | 2010-11-17 | 2010-11-17 | Integrated multi-loop low-voltage parallel-connection power capacitor |
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|---|---|
| CN201860119U true CN201860119U (en) | 2011-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206091514U Expired - Lifetime CN201860119U (en) | 2010-11-17 | 2010-11-17 | Integrated multi-loop low-voltage parallel-connection power capacitor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103426629A (en) * | 2013-08-19 | 2013-12-04 | 浙江南德电气有限公司 | Low-voltage power capacitor |
-
2010
- 2010-11-17 CN CN2010206091514U patent/CN201860119U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103426629A (en) * | 2013-08-19 | 2013-12-04 | 浙江南德电气有限公司 | Low-voltage power capacitor |
| CN103426629B (en) * | 2013-08-19 | 2017-03-29 | 浙江南德电气有限公司 | A kind of low voltage power capacitor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: DELIXI ELECTRIC (WUHU) CO., LTD. Free format text: FORMER OWNER: HANGZHOU XIZI GROUP CO., LTD. Effective date: 20120626 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 310023 HANGZHOU, ZHEJIANG PROVINCE TO: 241000 WUHU, ANHUI PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20120626 Address after: 241000 Wuhu Machinery Industry Park, Wuhu, Anhui Patentee after: Delixi Electric (Wuhu) Co., Ltd. Address before: 310023 Hangzhou, Zhejiang Province, leaving town stay and Road No. 98 Patentee before: Hangzhou Xizi Group Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20110608 |
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| CX01 | Expiry of patent term |