CN2369394Y - Automatic intellectual low voltage reactive compensator - Google Patents
Automatic intellectual low voltage reactive compensator Download PDFInfo
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- CN2369394Y CN2369394Y CN 99208820 CN99208820U CN2369394Y CN 2369394 Y CN2369394 Y CN 2369394Y CN 99208820 CN99208820 CN 99208820 CN 99208820 U CN99208820 U CN 99208820U CN 2369394 Y CN2369394 Y CN 2369394Y
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Abstract
The utility model relates to an automatic and intellectual low-voltage reactive compensator, which comprises a cabinet and a controller, a three-phase reactor, a three-phase fuse, a three-phase solid state relay, a triangular and Y-shaped conversion connecting plate and a three-phase compensation capacitor which are arranged in the cabinet. The fuse, the relay, the connecting plate and the capacitor are arranged in a modular unit drawer, one device can be matched with a plurality of unit drawers, each triangular and Y-shaped conversion connecting plate is changed into a triangular connection and a Y-shaped connection, the combination of a three-phase common supply and a three-phase division supply is realized, and the condition of the three-phase unbalance is adapted.
Description
The utility model relates to a kind of reactive power compensator in the power supply system, relates to a kind of intelligent low-pressure reactive power automatic compensation device or rather.
As everyone knows, reactive power compensation all has crucial meaning for electric power system and power consumer.For electric power system, idle if load, rudimentary electrical network are all drawn from power supply or higher level's electrical network, can cause reactive current unnecessary flowing in electrical network, cause the loss increasing of transmission and distribution line, transformer and the aggravation of voltage fluctuation; And concerning the user, idle from the electrical network absorption too much, can reduce transformer to exert oneself, reduce the quality of power supply, thereby influence the machining accuracy in the production process, low excessively power factor also can be caused the fine of power supply department.And the best approach that overcomes the above problems is taked local compensation exactly, can effectively reduce line loss, increase transformer and exert oneself and improve the quality of power supply.
The reactive-load compensation equipment of domestic the seventies is to adopt the mechanical switch switched capacitor, produces overcurrent, overvoltage when its inherent shortcoming is switching, the easy scaling loss of the contact starting the arc, so the useful life of capacitor is very short, can't compensate many impact loads, must be manually on duty.
The reactive power compensator of a new generation is an Intelligent Reactive Compensation Equipment, adopts the noncontacting switch of high power solid state relay as switched capacitor, to replace the contact switch of traditional A.C. contactor; Employing is the electronic controller of core control part with the microprocessor, change by following the tracks of the load reactive current, and control the solid-state relay switch quickly and accurately, the hierarchical capacitor group is carried out switching control fast and continually, zero passage detection when comprising switching, zero cross fired, no-voltage are thrown, zero current is cut etc., have characteristics such as no-flashy-flow impact, no switching overvoltage, no arc reignition, complete machine long service life, reactive power compensation dynamic response time are fast.
The capacitance compensation of threephase load mainly adopts dual mode, and promptly Δ connects compensation and Y connects compensation, and wherein Δ connection compensation is used for three-phase and mends (the full benefit) altogether, and the compensation of Y connection is used for three-phase and divides benefit.Traditional reactive power compensator is supposed three-phase equilibrium and carries out Δ to connect three-phase and mend altogether.But long-term distribution monitoring shows that threephase load electric current and power factor are unbalanced, and along with the increasing considerably of city dweller's user power utilization amount, the problem of this three-phase imbalance will be more outstanding and serious.Because therefore the maximum unbalance factor of index request three-phase electricity flow should adopt Δ to connect three-phase and mend altogether fully less than 25%, can not reach necessary compensation precision.But it is, extremely uneconomical again if adopt the Y order to compensate mutually.This is because according to Theoretical Calculation, and same big electric capacity is three times of its reactive current of providing in the Y connection to the reactive current that electrical network provides in the Δ connection.Promptly under the situation of three-phase equilibrium, reach identical compensation effect, connect three-phase with Δ and mend (the full benefit) comparable electric capacity that compensates (divide and mend) saving 2/3 with the Y order mutually altogether.Therefore, in the reactive power compensation of reality, preferably can and divide the compensation way of mending to be optimized, select the most rational compensation way full benefit.
The purpose of this utility model is a kind of intelligent low-pressure reactive power automatic compensation device of design, can provide Δ to connect three-phase and mend altogether and connect three-phase with Y and divide to mend the collocation structure that combines, and be convenient to the user and adjust connection, select capacitance and carry out Maintenance and Repair etc.
The purpose of this utility model is achieved in that a kind of intelligent low-pressure reactive power automatic compensation device, comprise cabinet and be arranged on the interior electronic controller of cabinet, three-phase reactor, three-phase fuse, three-phase solid-state relay and three-phase compensation capacitor, it is characterized in that: also include Δ/Y conversion terminal block, be arranged between three-phase solid-state relay and the three-phase compensation capacitor, Δ/Y conversion terminal block one side terminal connects the three-phase solid-state relay respectively, Δ/Y conversion terminal block opposite side binding post connects three-phase compensation capacitor respectively, and Δ/Y conversion terminal block also is provided with the binding post of a connection three-phase four-wire system N line.
Described three-phase fuse, three-phase solid-state relay, Δ/Y conversion terminal block and three-phase compensation capacitor are linked in sequence and are arranged in the unit drawer of a modular; Described unit drawer has more than one.
Described three-phase compensation capacitor is arranged on the rear portion of described unit drawer, described three-phase fuse, three-phase solid-state relay and Δ/Y conversion terminal block is arranged on the front portion of described unit drawer, wherein three-phase fuse and Δ/Y conversion terminal block is arranged on top, and the three-phase solid-state relay is arranged on the bottom.
Described electronic controller is arranged on the tip position place in the cabinet, and described three-phase reactor is arranged on the bottom position place in the cabinet, and described more than one unit drawer also is listed in the interior medium position place of cabinet.
The left and right sides at drawer top, described unit is fixed with sliding panel respectively, and described cabinet internal fixation has chute board, and described sliding panel is nested in the chute board.
Described unit drawer has five, all have in each unit drawer one realize Δ connect three-phase complete mend with Y connect three-phase divide mend between the Δ/Y conversion terminal block of mutual conversion.
Intelligent low-pressure reactive power automatic compensation device of the present utility model by the mode of connection of Δ/Y conversion terminal block is set, has realized that Δ connects the full benefit of three-phase and Y connects the compensation that three-phase divides benefit to combine, to adapt to the unbalanced situation of three-phase load; Modular cellular structure makes each unit drawer can select capacitance and can adjust connection arbitrarily arbitrarily, thereby realizing that three-phase is mended to divide to mend with three-phase altogether combines the reactive power compensation situation that can be widely used in not distinguishing on the same stage; Each drawer unit can be dismantled easily, is convenient to the replacing and the maintenance of device, as long as the wiring of conversion Δ/Y conversion terminal block upper connecting terminal, just can make it become that Δ connects or Y connects; The intellectuality control switching and the function that detects power distribution network automatically of device make device have high compensation precision, can in time test the electrical network operating mode again, and test data is handled the postscript address book stored; By the remote communication interface on the electronic controller, can carry out data communication with other intelligent power equipment, be convenient to power supply department and grasp relevant data, realize the scientific management of electrical network.
Device of the present utility model can be selected capacitance and connection according to field condition when just adorning, to reach best compensation effect, being in operation also can elect again.Device is before operation, can measure every group or reactive current and memory storage that each capacitor provided, value benchmark as switching, on this basis, required according to electrical network more idle situation, select the combination of immediate electric capacity to drop into electrical network intelligently, can be because of capacitance fade does not reduce compensation precision, thus reach good compensation effect.
Further specify technology of the present utility model below in conjunction with embodiment and accompanying drawing.
Fig. 1 is the fundamental diagram of this intelligent low-pressure reactive power automatic compensation device embodiment
Fig. 2 is the Δ mode of connection schematic diagram of Δ/Y conversion terminal block
Fig. 3 is the Y mode of connection schematic diagram of Δ/Y conversion terminal block
Fig. 4 is the Modular units drawer structure schematic diagram of this intelligent low-pressure reactive power automatic compensation device
Fig. 5 is the structural representation of this intelligent low-pressure reactive power automatic compensation device embodiment
Referring to Fig. 1, the enforcement circuit that has the intelligent low-pressure reactive power automatic compensation device of five Modular units drawers 11,12,13,14,15 shown in the figure, wherein drawer 11,12,13 structures in unit are identical, be to adopt the three-phase of Δ wiring to mend frame mode entirely, drawer 14,15 structures in unit are identical, be to adopt the three-phase of Y wiring to divide to mend frame mode (only provide among the figure Δ connects and the Y connection circuit, and not shown Δ/Y conversion terminal block).
Structure with unit drawer 11 and unit drawer 14 is an example, comprise three-phase fuse FU1, FU2, FU3 and FU10, FU11, FU12, three-phase solid-state relay J12, J14, J15 and J4, J5, J6, three-phase building-out capacitor C1-1, C1-2, C1-3 and C4-1, C4-2, C4-3, with switching indicator light 1da1,1db1,1dc1 and 1da4,1db4,1dc4, three-phase building-out capacitor C1-1, C1-2, C1-3 adopt the Δ connection, and three-phase building-out capacitor C4-1, C4-2, C4-3 adopt the Y connection.
A, B, C, N are from three-phase four-wire system among the figure, close behind the air switch K, three-phase electricity is through the tip side of current limiting reactor LA, LB, LC and fuse FU1 to FU15 arrival solid-state relay J1 to J15, and another tip side of solid-state relay J1 to J15 then connects according to Δ or Y connects the three-phase building-out capacitor in succession.Electronic controller 16 is judged the building-out capacitor that needs input from system acquisition three-phase voltage and current signal, and J1 to J15 exports control signal to solid-state relay, and the solid-state relay that conducting is required drops into capacitor under the situation of no-flashy-flow; When satisfying exit criteria, electronic controller 16 output control signals are given corresponding solid-state relay, close automatically when flowing through the current over-zero of solid-state relay.
Referring to Fig. 2, utilize the syndeton of Δ/when Y conversion terminal block 20 carries out the Δ wiring shown in the figure.Δ/Y conversion terminal block 20 is provided with the binding post (post) 201 to 207 that two row hang with lug plate, 201 connect the N line of three-phase four-wire system, 202 to 204 connect three building-out capacitor C1 to C3 respectively, 205 to 207 connect three solid-state relay D1 to D3 respectively, three solid-state relay D1 to D3 connect three fuse F1 to F3 respectively, three fuse F1 to F3 connect three reactor LA, LB, LC one end respectively, and three reactor LA, LB, the LC other ends connect A, B, the C line of three-phase four-wire system respectively.Binding post 202 is connected with 205, and binding post 203 is connected with 206, and binding post 204 is connected with 207.
Referring to Fig. 3, utilize the Y mode of connection structure of Δ/Y conversion terminal block 20 shown in the figure.Δ/Y conversion terminal block 20 is provided with the binding post (post) 201 to 207 that two row hang with lug plate, wherein 201,202,203,204 are connected to each other and are connected with the N line of three-phase four-wire system, an and end of three capacitor C 1 to C3 of connection, the other end of three capacitor C 1 to C3 connects binding post 205 respectively, 206,207 also connect three solid-state relay D1 to D3 simultaneously, three solid-state relay D1 to D3 connect three fuse F1 to F3 respectively, three fuse F1 to F3 connect three reactor LA respectively, LB, LC one end, three reactor LA, LB, the LC other end connects the A of three-phase four-wire system respectively, B, the C line.
From the circuit structure of Fig. 2, Fig. 3, can prove absolutely, utilize the mode of connection of Δ/Y conversion terminal block 20, can easily building-out capacitor C1, C2, C3 be changed over the Δ mode of connection or the Y mode of connection, the realization three-phase is mended altogether with three-phase and is divided benefit to combine.
Referring to Fig. 4, the structure of a Modular units drawer 40 shown in the figure.41 is panel among the figure, be provided with three switching indicator lights 42,43,44, the left and right sides, top is fixed with sliding panel 45 (the opposite side sliding panel is invisible among the figure), can be nested with the chute board (referring to 52 among Fig. 5) that is fixed in the reactive power compensator cabinet, push-and-pull unit drawer 40 just can drive it and slide along chute board, inside and outside the reactive power compensator cabinet of freely coming in and going out.
Three-phase building-out capacitor C1, C2, C3 are arranged on the rear portion of Modular units drawer 40, three solid-state relay D1 to D3, three fuse F1 to F3 and Δ/20 front portions that are arranged on Modular units drawer 40 of Y conversion terminal block, wherein three fuse F1 to F3 and Δ/Y conversion terminal block 20 are arranged on top, and three solid-state relay D1 to D3 then are arranged on the bottom.The layout clear and rational of above-mentioned device makes that wire harness is simple, easy-to-connect and be convenient to maintenance.Three-phase building-out capacitor C1, C2, C3 can adopt the self-healing power capacitor.
Referring to Fig. 5, has the structure of the intelligent low-pressure reactive power automatic compensation device integral layout of five Modular units drawers 40 shown in the figure.Electronic controller 16 is arranged on the top of cabinet 50, and five Modular units drawers 40 are set up in parallel at the middle part of cabinet 50, and three reactor LA, LB, LC then are arranged on the bottom (invisible among the figure) of cabinet 50.K is an air switch among the figure, and 51 are the combination terminal box.52 is chute board, has five pairs ten, respectively with five Modular units drawers 40 on sliding panel 45 be nested.
This cabinet body structure is reasonable in design, makes by adopting numerical control sheet metal process technology, and zinc-plated cold drawing plastic-blasting or stainless steel casing have the long-lived characteristics of good looking appearance.
Intelligent low-pressure reactive power automatic compensation device of the present utility model, can be widely used in machine-building, metallurgy, mine, railway, light industry, chemical industry, building materials, oil field, harbour etc. and use in the distrbution network of power frequency 380V, to biotope, commerce, school, and low-voltage customer and chamber, interior distribution station, box-type substation, the outdoor power transformation platform of rural power grids carry out automatic tracking and compensating.
Claims (6)
1. intelligent low-pressure reactive power automatic compensation device, comprise cabinet and be arranged on the interior electronic controller of cabinet, three-phase reactor, three-phase fuse, three-phase solid-state relay and three-phase compensation capacitor, it is characterized in that: also include Δ/Y conversion terminal block, be arranged between three-phase solid-state relay and the three-phase compensation capacitor, Δ/Y conversion terminal block one side terminal connects the three-phase solid-state relay respectively, Δ/Y conversion terminal block opposite side binding post connects three-phase compensation capacitor respectively, and Δ/Y conversion terminal block also is provided with the binding post of a connection three-phase four-wire system N line.
2. intelligent low-pressure reactive power automatic compensation device according to claim 1 is characterized in that: described three-phase fuse, three-phase solid-state relay, Δ/Y conversion terminal block and three-phase compensation capacitor are linked in sequence and are arranged in the unit drawer of a modular; Described unit drawer has more than one.
3. intelligent low-pressure reactive power automatic compensation device according to claim 1 and 2, it is characterized in that: described three-phase compensation capacitor is arranged on the rear portion of described unit drawer, described three-phase fuse, three-phase solid-state relay and Δ/Y conversion terminal block is arranged on the front portion of described unit drawer, wherein three-phase fuse and Δ/Y conversion terminal block is arranged on top, and the three-phase solid-state relay is arranged on the bottom.
4. intelligent low-pressure reactive power automatic compensation device according to claim 1 and 2, it is characterized in that: described electronic controller is arranged on the tip position place in the cabinet, described three-phase reactor is arranged on the bottom position place in the cabinet, and described more than one unit drawer also is listed in the interior medium position place of cabinet.
5. intelligent low-pressure reactive power automatic compensation device according to claim 1 and 2 is characterized in that: the left and right sides at drawer top, described unit is fixed with sliding panel respectively, and described cabinet internal fixation has chute board, and described sliding panel is nested in the chute board.
6. intelligent low-pressure reactive power automatic compensation device according to claim 1 and 2, it is characterized in that: described unit drawer has five, all have in each unit drawer one realize Δ connect three-phase complete mend with Y connect three-phase divide mend between the Δ/Y conversion terminal block of mutual conversion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99208820 CN2369394Y (en) | 1999-04-27 | 1999-04-27 | Automatic intellectual low voltage reactive compensator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99208820 CN2369394Y (en) | 1999-04-27 | 1999-04-27 | Automatic intellectual low voltage reactive compensator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2369394Y true CN2369394Y (en) | 2000-03-15 |
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ID=34002508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99208820 Expired - Lifetime CN2369394Y (en) | 1999-04-27 | 1999-04-27 | Automatic intellectual low voltage reactive compensator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2369394Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102946108A (en) * | 2012-11-21 | 2013-02-27 | 保定供电公司 | Voltage automatic compensation device |
| CN102983583A (en) * | 2012-12-22 | 2013-03-20 | 张家港保税区天翔电气有限公司 | Reactive capacitance compensation cabinet |
| CN103138272A (en) * | 2011-12-02 | 2013-06-05 | 上海连成（集团）有限公司 | Total-sub compensation mixed compensation cabinet |
| CN105958505A (en) * | 2016-05-27 | 2016-09-21 | 国网新疆电力公司乌鲁木齐供电公司 | Graphene intelligent capacitor |
| CN106932022A (en) * | 2017-04-18 | 2017-07-07 | 潍坊科技学院 | A kind of automation control system for power plant |
-
1999
- 1999-04-27 CN CN 99208820 patent/CN2369394Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103138272A (en) * | 2011-12-02 | 2013-06-05 | 上海连成（集团）有限公司 | Total-sub compensation mixed compensation cabinet |
| CN102946108A (en) * | 2012-11-21 | 2013-02-27 | 保定供电公司 | Voltage automatic compensation device |
| CN102983583A (en) * | 2012-12-22 | 2013-03-20 | 张家港保税区天翔电气有限公司 | Reactive capacitance compensation cabinet |
| CN105958505A (en) * | 2016-05-27 | 2016-09-21 | 国网新疆电力公司乌鲁木齐供电公司 | Graphene intelligent capacitor |
| CN105958505B (en) * | 2016-05-27 | 2018-06-26 | 国网新疆电力公司乌鲁木齐供电公司 | A kind of graphene intelligent capacitor |
| CN106932022A (en) * | 2017-04-18 | 2017-07-07 | 潍坊科技学院 | A kind of automation control system for power plant |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |