CN201854040U - Intelligent low-voltage power capacitor - Google Patents
Intelligent low-voltage power capacitor Download PDFInfo
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- CN201854040U CN201854040U CN2010206265484U CN201020626548U CN201854040U CN 201854040 U CN201854040 U CN 201854040U CN 2010206265484 U CN2010206265484 U CN 2010206265484U CN 201020626548 U CN201020626548 U CN 201020626548U CN 201854040 U CN201854040 U CN 201854040U
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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 provides an intelligent low-voltage power capacitor, which comprises a low-voltage capacitor, relays, a low-voltage circuit board, a high-voltage circuit board, silicon controlled rectifiers, a singlechip, and detection circuits and drive circuits arranged on the low-voltage circuit board, wherein the singlechip is arranged on the low-voltage circuit board, the relays and the silicon controlled rectifiers are arranged on the high-voltage circuit board, the high-voltage circuit board is fixed on the capacitor and is electrically connected with the capacitor, the low-voltage circuit board is fixed on the high-voltage circuit board and is electrically connected with the high-voltage circuit board, the A phase, the B phase and the C phase of an external three-phase supply are respectively communicated with the detection circuits, the relays or the silicon controlled rectifiers on the A phase, the B phase and the C phase are respectively communicated with the corresponding silicon controlled rectifier drive circuit and the relay drive circuit, the B-phase detection circuit and the C-phase detection circuit are communicated with the silicon controlled rectifiers, and the B-phase silicon controlled rectifier and the C-phase silicon controlled rectifier are communicated with the relays. The utility model realizes that the silicon controlled rectifiers are input when the voltage is zero, so that the inrush current is avoided; and the intelligent low-voltage power capacitor has the characteristics of low energy consumption, sensitive reaction, safety and the like.
Description
Technical field
The utility model relates to a kind of capacitor, especially a kind of intelligent low-pressure power capacitor.
Background technology
Along with the development of society, electricity needs is increasing, and the power distribution network area is more and more wider, and especially in the low-voltage network, the user is various, and load is complicated.Reactive loss is also increasing in the low voltage electric network, influences power grid quality, loss a large amount of limited energy.China advocates shape energy-saving and emission-reduction policy at present, and the reactive power compensation situation of tightening and improving electrical network is for reducing electric energy loss, and raising quality of voltage etc. has very important significance.Along with my Chinese national economy constantly develops, especially country puts into effect and implements 4,000,000,000,000 sustainable development plans, China's power transmission and transformation industry develops on an unprecedented scale acquisition, demand to reactive power compensator in the low voltage power transmission will sharply increase, particularly to having the intelligentized also corresponding increase of capacitor demand that has reactive power compensator.
The capacitor that tradition has reactive power compensator mainly adopts mechanical contact fling-cut switch, secondary capacitor, thermal relay, fuse etc. to constitute the switching circuit, but in the mechanical contact fling-cut switch, threephase switch is at uncertain line voltage point switching low-voltage capacitor at random, rush of current is big, the rated current of minimum several times causes the line voltage distortion.Sometimes combined floodgate mechanical contact spring also occurs, open the danger of restriking in the contact, particularly make capacitor group overvoltage when the combustion of contact bullet, damage capacitor, cause the accident easily.For protective circuit, capacitor adopts fuse and thermal relay to protect, and then protects single.If a certain fault that fuses mutually appears in fuse, can't cut off capacitor automatically, cause the defective of phase shortage compensation, thermal relay only depends on the bimetal leaf heated bending to come work, and sensitivity is not high, and the capacitor of right fault can not be in time excised in normal appearance, and consequence is serious.Wherein, reactive power compensator mechanical contact fling-cut switch in the traditional capacitor in case after dropping into all be by the thermal relay coil keep electricity condition, so oneself power consumption is big, easily heating, waste electric energy and influence useful life of contactor.Therefore, there is the reactive power compensation deficiency in the electrical network of being furnished with the capacitor of traditional reactive power compensator, idle plant failure rate height, and oneself power consumption is big, can produce harmonic wave and electrical network is polluted, and power capacitor reactive compensation installation is short useful life, and wiring is many, not the shortcoming of easy care.In addition, traditional intelligence formula low voltage power capacitor is by independently fuse, relay, compound control switch and power capacitor combine an integral body with some, the result who causes like this is that overall volume is big, the limited amount that can install in the distribution box of certain specification, improve institute greatly and taken up space, reduced operating efficiency.
Summary of the invention
In order to overcome the deficiencies in the prior art, the utility model provides a kind of volume little, and energy consumption is low, and reaction is responsive, and safety is saved cost, the intelligent low-pressure power capacitor of being convenient to safeguard.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of intelligent low-pressure power capacitor, include secondary capacitor and relay, it is characterized in that: also include the low-voltage circuit plate, the high-tension circuit plate, controllable silicon, single-chip microcomputer, and be located at testing circuit and drive circuit on the low-voltage circuit plate, single-chip microcomputer is installed on the low-voltage circuit plate and with testing circuit and drive circuit and is connected, relay and controllable silicon are installed on the high-tension circuit plate, the high-tension circuit plate is fixed on the capacitor and with the capacitor formation and electrically connects, the low-voltage circuit plate is fixed on the high-tension circuit plate and with high-tension circuit plate formation and electrically connects, described testing circuit includes the A phase detecting circuit that is communicated with single-chip microcomputer respectively, B phase detecting circuit and C phase detecting circuit, drive circuit includes the A phase relay drive circuit that is communicated with single-chip microcomputer respectively, B phase controllable silicon drive circuit, B phase relay drive circuit, C phase controllable silicon drive circuit and C phase relay drive circuit, relay comprises the A phase relay, B phase relay and C phase relay, controllable silicon includes B phase controllable silicon and C controllable silicon mutually, the three phase mains that is inserted by the outside comprises the A phase, the B phase, the C phase, A is communicated with through A phase detecting circuit and A phase relay, A phase relay connected sum A phase relay drive circuit is communicated with, B is through B phase detecting circuit and B controllable silicon connection mutually, B phase controllable silicon and B phase relay are communicated with, controllable silicon drive circuit and B phase relay drive circuit are communicated with mutually with B respectively for B phase controllable silicon and B phase relay, C is through C phase detecting circuit and C controllable silicon connection mutually, C phase controllable silicon and C phase relay are communicated with, and controllable silicon drive circuit and C phase relay drive circuit are communicated with mutually with C respectively for C phase controllable silicon and C phase relay.
Adopt technique scheme, because the setting of low-voltage circuit plate and high-tension circuit plate makes integral body compact more, smaller volume, the convenient installation and carrying.Wherein, by the detection of testing circuit, when can be implemented in voltage zero-cross just with the controllable silicon input, thereby avoided shoving, and after stablizing,, cut out controllable silicon with relay adhesive conducting, because the major loop contact resistance of relay is little, power consumption is little, does not generate heat and produces without any harmonic wave; When cutting out, with the controllable silicon input, relay cuts out, and the controllable silicon Continuity signal is cancelled, and the characteristic of utilizing the controllable silicon current over-zero to turn-off realizes that current over-zero automatically shuts down.Because the energy consumption of reaction of controllable silicon and relay is low, speed is fast, good stability, so satisfied the utility model low energy consumption, reaction is responsive, so overall structure is simple, and cost is low, and is safe, and is convenient to safeguard.
Of the present utility modelly further be set to: described relay is magnetic latching relay.
Adopt technique scheme, magnetic latching relay can keep normally closed or normally open by the permanent-magnet steel of self, so do not need extra electric energy to keep, can not produce heat energy simultaneously because of the energising of coil yet and run off, thereby further reduce energy consumption of the present utility model.
Of the present utility modelly further be set to again: also be provided with support on the described capacitor, the high-tension circuit plate is fixed on the support and with the capacitor formation and electrically connects, and also is provided with the high-power components testing circuit, lack detection circuit and the switch working state display circuit that are communicated with single-chip microcomputer respectively on the low-voltage circuit plate.
Adopt technique scheme, the high-tension circuit plate is fixed by support and capacitor, the stability when having improved the work of high-tension circuit plate; The high-power components testing circuit can detect the operating state of high-power components and feed back timely, lack detection circuit can detect the situation of voltage input end, thereby make corresponding feedback by single-chip microcomputer, the switch working state display circuit can be connected with outside indicator light, thereby can show operating state of the present utility model intuitively, easily, realize monitoring in real time.
Below in conjunction with accompanying drawing the utility model is further described.
Description of drawings
Fig. 1 is the schematic diagram of the utility model embodiment.
Fig. 2 is the theory diagram of the utility model embodiment.
Fig. 3 is the flow chart of the utility model embodiment.
Embodiment
As shown in Figure 1, 2, 3, present embodiment includes secondary capacitor 1, low-voltage circuit plate 2, high-tension circuit plate 3, be covered on the lid 4 of secondary capacitor 1 outside, be welded in single-chip microcomputer 21 on the low-voltage circuit plate 2 and magnetic latching relay 31 and the controllable silicon 32 on welding and the high-tension circuit plate 3, secondary capacitor 1 is provided with support 11, high-tension circuit plate 3 is set up on the support 11 and with capacitor 1 and electrically connects by the lead formation, and low-voltage circuit plate 2 vertical fixing electrically connect on high-tension circuit plate 3 and with high-tension circuit plate 3 formations.Weldering is provided with the different circuit of a plurality of functions on low-voltage circuit plate 2, include the testing circuit and the drive circuit that are connected with single-chip microcomputer 21, testing circuit includes the A phase detecting circuit 221 that is communicated with single-chip microcomputer 21 respectively, B phase detecting circuit 222 and C phase detecting circuit 223, drive circuit includes the A phase relay drive circuit 231 that is communicated with single-chip microcomputer 21 respectively, B phase controllable silicon drive circuit 234, B phase relay drive circuit 232, C phase controllable silicon drive circuit 235 and C phase relay drive circuit 233, magnetic latching relay 31 includes A phase relay 311, B phase relay 312 and C phase relay 313, described controllable silicon 32 include B phase controllable silicon 321 and C controllable silicon 322 mutually.It in the high voltage power transmission is to carry out reactive power compensation that intelligent low-pressure power capacitor in the utility model is mainly used in, therefore the power supply that is inserted by the outside mostly is three phase mains, and three phase mains comprises the A phase, the B phase, the C phase, wherein A is communicated with 311 through A phase detecting circuit 221 and A phase relay, connection 311 of A phase relay and A phase relay drive circuit 231 are communicated with, B is through B phase detecting circuit 222 and B controllable silicon 321 connections mutually, B phase controllable silicon 321 1 ends and B phase relay 312 are communicated with, controllable silicon drive circuit 234 and B phase relay drive circuit 232 are communicated with mutually with B respectively for B phase controllable silicon 321 and B phase relay 312, C is through C phase detecting circuit 223 and C controllable silicon 322 connections mutually, C phase controllable silicon 322 and C phase relay 313 is communicated with, and controllable silicon drive circuit 235 and C phase relay drive circuit 233 are communicated with mutually with C respectively for C phase controllable silicon 322 and C phase relay 313.In addition, on low-voltage circuit plate 2, also be provided with the high-power components testing circuit 24, lack detection circuit 25 and the switch working state display circuit 26 that are communicated with single-chip microcomputer 21 respectively, lid 4 is provided with two indicator lights 41, indicator light 41 all realizes that with switch working state circuit is connected, the indication when showing operation and malfunction respectively thus.
As shown in Figure 3, at first finish single-chip microcomputer 21 each pin and each initialization of register, control signal is for connecting, if the on state begins to locate to program, as its unaccessed state, then drop into A phase relay 311, detect B phase voltage zero-crossing timing, and when zero passage, drop into B phase controllable silicon, detect C phase voltage zero-crossing timing, and when zero passage, drop into B phase controllable silicon, drop into B, C phase relay (312,313), withdraw from B, C phase controllable silicon (321,322), begin to locate to program; Control signal is for closing, the requirement switch turn-offs, and the on state then begins the place to program in this way, as not being off state, then drop into B, C phase controllable silicon (321,322), cut out B, C phase relay (312,313), turn-off controllable silicon 32, allow controllable silicon 32 current over-zeros automatically shut down, after time-delay a period of time, cut out A phase relay 311, begin to locate to program.
In the utility model, detection by testing circuit, ability is with the controllable silicon input when can be implemented in voltage zero-cross, thereby avoided shoving, and after stablizing, used magnetic latching relay 31 adhesive conductings, cut out controllable silicon 32, because the major loop contact resistance of magnetic latching relay 31 is little, power consumption is little, does not generate heat and produces without any harmonic wave; When cutting out, controllable silicon 32 is dropped into, magnetic latching relay 31 cuts out, and controllable silicon 32 Continuity signals are cancelled, and the characteristic of utilizing controllable silicon 32 current over-zeros to turn-off realizes that current over-zero automatically shuts down.Because the energy consumption of reaction of controllable silicon 32 and magnetic latching relay 31 is low, speed is fast, good stability, so satisfied the utility model low energy consumption, reaction is responsive, and the product life cycle is long, and cost reduces at double, and fail safe has obtained improving greatly, and is convenient to safeguard.Wherein, armature is by the permanent magnet sticking in the magnetic latching relay 31, and circuit can keep normally closed or normally open after connecting, so do not need extra electric energy to keep, more can not produce heat energy thus because of the energising of coil and run off, thereby further reduce energy consumption of the present utility model.The utility model adopts the integrated mode of circuit board, by low, high-tension circuit plate (2,3) so that different circuit and components and parts branch are arranged, and arrange the circuit on the traditional capacitor integrated, thereby make the utility model integral body compact more, the cabinet type setting of traditional relatively group, reduced about 50% than traditional autocompensation installation with content volume, just saved 50% space, the convenient installation and transportation.In addition, high-power components testing circuit 24 can detect the operating state of high-power components and feed back timely, lack detection circuit 25 can detect the situation of voltage input end, thereby make corresponding feedback by single-chip microcomputer 21, switch working state display circuit 26 can be connected with outside indicator light 41, thereby can show operating state of the present utility model intuitively, easily, realize monitoring in real time.The utility model can also have other execution modes, and the technical scheme that equal replacement of all employings or equivalent transformation form all drops within the claimed scope of the utility model.
Claims (3)
1. intelligent low-pressure power capacitor, include secondary capacitor and relay, it is characterized in that: also include the low-voltage circuit plate, the high-tension circuit plate, controllable silicon, single-chip microcomputer, and be located at testing circuit and drive circuit on the low-voltage circuit plate, single-chip microcomputer is installed on the low-voltage circuit plate and with testing circuit and drive circuit and is connected, relay and controllable silicon are installed on the high-tension circuit plate, the high-tension circuit plate is fixed on the capacitor and with the capacitor formation and electrically connects, the low-voltage circuit plate is fixed on the high-tension circuit plate and with high-tension circuit plate formation and electrically connects, described testing circuit includes the A phase detecting circuit that is communicated with single-chip microcomputer respectively, B phase detecting circuit and C phase detecting circuit, drive circuit includes the A phase relay drive circuit that is communicated with single-chip microcomputer respectively, B phase controllable silicon drive circuit, B phase relay drive circuit, C phase controllable silicon drive circuit and C phase relay drive circuit, relay comprises the A phase relay, B phase relay and C phase relay, controllable silicon includes B phase controllable silicon and C controllable silicon mutually, the three phase mains that is inserted by the outside comprises the A phase, the B phase, the C phase, A is communicated with through A phase detecting circuit and A phase relay, A phase relay connected sum A phase relay drive circuit is communicated with, B is through B phase detecting circuit and B controllable silicon connection mutually, B phase controllable silicon and B phase relay are communicated with, controllable silicon drive circuit and B phase relay drive circuit are communicated with mutually with B respectively for B phase controllable silicon and B phase relay, C is through C phase detecting circuit and C controllable silicon connection mutually, C phase controllable silicon and C phase relay are communicated with, and controllable silicon drive circuit and C phase relay drive circuit are communicated with mutually with C respectively for C phase controllable silicon and C phase relay.
2. intelligent low-pressure power capacitor according to claim 1 is characterized in that: described relay is magnetic latching relay.
3. intelligent low-pressure power capacitor according to claim 1 and 2, it is characterized in that: also be provided with support on the described capacitor, the high-tension circuit plate is fixed on the support and with the capacitor formation and electrically connects, and also is provided with the high-power components testing circuit, lack detection circuit and the switch working state display circuit that are communicated with single-chip microcomputer respectively on the low-voltage circuit plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206265484U CN201854040U (en) | 2010-11-26 | 2010-11-26 | Intelligent low-voltage power capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206265484U CN201854040U (en) | 2010-11-26 | 2010-11-26 | Intelligent low-voltage power capacitor |
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| Publication Number | Publication Date |
|---|---|
| CN201854040U true CN201854040U (en) | 2011-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206265484U Expired - Fee Related CN201854040U (en) | 2010-11-26 | 2010-11-26 | Intelligent low-voltage power capacitor |
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| Country | Link |
|---|---|
| CN (1) | CN201854040U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101986499A (en) * | 2010-11-26 | 2011-03-16 | 浙江大荣电气有限公司 | Intelligent low-voltage power capacitor |
-
2010
- 2010-11-26 CN CN2010206265484U patent/CN201854040U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101986499A (en) * | 2010-11-26 | 2011-03-16 | 浙江大荣电气有限公司 | Intelligent low-voltage power capacitor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110601 Termination date: 20131126 |