CN103680884A - 10kv intelligent energy balance distribution transformer - Google Patents
10kv intelligent energy balance distribution transformer Download PDFInfo
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- CN103680884A CN103680884A CN201310735473.1A CN201310735473A CN103680884A CN 103680884 A CN103680884 A CN 103680884A CN 201310735473 A CN201310735473 A CN 201310735473A CN 103680884 A CN103680884 A CN 103680884A
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Abstract
A 10kv intelligent energy balance distribution transformer comprises a casing, a three-limb core and a three-phase winding, wherein the three-phase winding is divided into a primary winding and a secondary winding, three input ends of the primary winding are respectively connected with an A-phase, a B-phase and a C-phase on the high-voltage side, four output ends of the secondary winding are respectively an a phase, a b phase, a c phase and an o line, and an on-load tap changing switch is installed on the casing. The primary winding comprises multiple sub-windings which are respectively wound on different core limbs, each sub-winding is provided with a plurality of taps, and the taps of the sub-windings are connected through the on-load tap changing switch. The secondary winding also comprises a plurality of sub-windings which are also respectively wound on the different core limbs, the number of turns of the primary winding is changed through a tap changing switch K, and the effect of balancing three-phase electric energy is achieved through electromagnetic interactions and phase reversal superposition of the windings. The 10kv intelligent energy balance distribution transformer can dynamically adjust the three-phase electric energy and reduce null line current.
Description
Technical field
The present invention relates to a kind of transformer, especially a kind of 10kv intelligence energy balance distribution transformer.
Background technology
As everyone knows, in normal symmetrical operation situation, three-phase voltage and three-phase current keep symmetry status.And three-phase system user's load is asymmetric often, unbalanced operation is common running status.As the electric locomotive in electric railway, the main frequency furnace of metallurgy industry etc. belongs to typical single-phase load, and its electric current can reach even several kilo-amperes of hundreds of peace, and the impact of negative-sequence current and zero-sequence current is quite serious.The asynchronism that drop into residential quarter, large-scale office building, market single-phase load, and low-voltage network construction retrofit and operation maintenance is not in place, has caused low-voltage network three-phase load to distribute imbalance problem.And the existence of negative-sequence current is to transmission line and power consumption equipment; comprise that transformer itself has produced a series of harmful effects; as reduced the utilance of power-supply device; cause the additional heating of generator amature and vibration; the particularly safe operation of induction motor of harm power consumption equipment; reduced power factor, increased line loss and voltage-drop, disturbed and affected correct operation of relaying protection and automatics etc.The existence of zero-sequence current makes transformer fe produce zero sequence main flux in the heart, then produces zero sequence electromotive force, causes that electromotive force triangle center point is moved, and causes Voltage unbalance.Cause zero line overload, cause the heating of zero line line loss and and then breaking out of fire.But, the current transformer that also there is no to solve technical problem; Therefore, designing a kind of 10kv intelligence energy balance distribution transformer that can dynamically adjust three-phase electric energy, reduce neutral line current, is the current technical issues that need to address.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of 10kv intelligence energy balance distribution transformer that can dynamically adjust three-phase electric energy, reduce neutral line current.
The technical scheme that the present invention solves its technical problem is:
10kv intelligence energy balance distribution transformer, comprise housing, three-limb core and three phase windings, three phase windings divide winding and secondary winding, three inputs of a winding connect respectively on high-tension side A phase, B phase, C phase, four outputs of secondary winding are respectively a phase, b phase, c phase, o line, on load tap changer is installed on housing, one time winding comprises a plurality of sub-windings, a plurality of sub-windings are wrapped in respectively on different core limbs, each sub-winding all has some taps, and the tap of sub-winding connects by load tap changer; Secondary winding also comprises a plurality of sub-windings, and a plurality of secondary sub-windings are also wrapped in respectively on different core limbs, changes the number of turn of a winding by shunting switch K, and the electromagnetism exchange by winding, inversely adding reaches the effect of balance three-phase electric energy.
As a preferred embodiment of the present invention, control system is also installed on housing, by controller, control the number of turn that shunting switch K changes a winding, the electromagnetism exchange by winding, inversely adding reaches the effect of balance three-phase electric energy.
As a preferred embodiment of the present invention, described control system comprises current sensing means, voltage check device, winding temperature detection module, electrical quantity sensor and controller, voltage check device, current sensing means, winding temperature detection module, electrical quantity sensor is connected with signal with controller, the voltage parameter that current sensing means and voltage check device detect, current parameters, through electrical quantity sensor, pass to controller, winding temperature parameter passes to controller, voltage parameter, current parameters via controller calculates, the number of turn that changes first side winding by controlling shunting switch K after analysis is carried out operational mode conversion.
As a preferred embodiment of the present invention, three core limbs of three-limb core are respectively R, S, T, on three core limbs, there are respectively four windings, are respectively: primary side LR1, LR2, LS1, LS2, LT1, LT2, secondary side LR3, LR4, LS3, LS4, LT3, LT4; Each winding of three-phase primary side has respectively five taps, and each sub-winding tap is connected with respectively on-load shunting switch; The connected mode of LR1, each tap of LS2 is: A11 connects B21 by load tap changer K, A12 connects B22 by load tap changer K, A13 connects B23 by load tap changer K, and A14 connects B24 by load tap changer K, and A15 connects B25 by load tap changer K; The connected mode of LS1, each tap of LT2 is: B11 connects C21 by load tap changer K, B12 connects C22 by load tap changer K, B13 connects C23 by load tap changer K, and B14 connects C24 by load tap changer K, and B15 connects C25 by load tap changer K; LT1, LR2 connected mode are: C11 connects A21 by load tap changer K, C12 connects A22 by load tap changer K, C13 connects A23 by load tap changer K, and C14 connects A24 by load tap changer K, and C15 connects A25 by load tap changer K; Three-phase secondary side connected mode is: LR3 tail end is connected with LS4 head end, and LS3 tail end is connected with LT4 head end, and LT3 tail end is connected with LR4 head end.
As a preferred embodiment of the present invention, described voltage parameter is input voltage UA, UB, UC, output voltage U a, the Ub of three phase windings, the Uc of three phase windings, described current parameters is three-phase current Ia, Ib, Ic, described winding temperature parameter is the temperature of three phase windings, and the temperature-sensitive element of described winding temperature detection module is located in the interior transformer oil of housing of transformer.
As a preferred embodiment of the present invention, described operational mode comprises operational mode 1, operational mode 2, operational mode 3, operational mode 4, operational mode 5, described operational mode conversion carries out pattern conversion when output line voltage is not within the scope of 360V and 400V, and output voltage is returned within the scope of 360V and 400V; Described operational mode 1 is that pressure regulation+6% on load tap changer K operates in A11 and B21 connects, and B11 and C 21 connect, and C11 and A21 connect; Operational mode 2 is that pressure regulation+3% on load tap changer operates in A12 and B22 connects, and B12 and C 22 connect, and C12 and A22 connect; Operational mode 3 not voltage regulating loading tap changer operate in A13 and B23 and connect, B13 and C 23 connect, C13 and A23 connection; Operational mode 4 is that pressure regulation-3% on load tap changer operates in A14 and B24 connects, and B14 and C 24 connect, and C14 and A24 connect; Operational mode 5 is that pressure regulation-6% on load tap changer operates in A15 and B25 connects, and B15 and C 25 connect, and C15 and A25 connect.
As a preferred embodiment of the present invention, described on load tap changer is five grades of shunting switchs, one grade of shunting switch, five kinds of operational modes of second gear, third gear, fourth gear, the five grades of corresponding 10kv intelligence of difference energy balance distribution transformers; When winding temperature higher than set 120 ° of C time, 10kv intelligence energy balance distribution transformer automatically switches to operational mode 3.
Above-mentioned is a kind of embodiment of the present invention, if when three-phase voltage, current imbalance phenomenon are larger, can increase centre tap on winding and the quantity of on load tap changer simultaneously, and the present invention can have more operational mode.
Compared with prior art, the present invention can dynamically adjust three-phase electric energy, reduce neutral line current, it is a kind of three-phase voltage that is suitable for causing because the electricity consumption of electrical network three-phase is uneven, current imbalance, neutral line current increases the operating mode of phenomenon (as steel mill, petrochemical industry, cement mining industry, hotel, large scale business place, office building, supermarket and plaza lighting, large-scale synthesis place is as school, hospital, residential quarter), the intelligent energy balance power transformer using, it can be manual, automatically adjust three-phase voltage, electric current tends to balance it, reduce neutral line current, while making load, be engraved under power save mode and move, there is balanced three-phase voltage, electric current, reduce neutral line current, the effect of saves energy.
Accompanying drawing explanation
Fig. 1 is the front view of product appearance figure of the present invention;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is winding schematic diagram of the present invention;
Fig. 4 is on load tap changer gear table of the present invention.
Embodiment
As shown in the figure, 10kv intelligence energy balance distribution transformer, comprise housing, three-limb core and three phase windings, three phase windings divide winding and secondary winding, three inputs of a winding connect respectively on high-tension side A phase, B phase, C phase, four outputs of secondary winding are respectively a phase, b phase, c phase, o line, on load tap changer is installed on housing, one time winding comprises a plurality of sub-windings, a plurality of sub-windings are wrapped in respectively on different core limbs, each sub-winding all has some taps, and the tap of sub-winding connects by load tap changer; Secondary winding also comprises a plurality of sub-windings, and a plurality of secondary sub-windings are also wrapped in respectively on different core limbs, changes the number of turn of a winding by shunting switch K, and the electromagnetism exchange by winding, inversely adding reaches the effect of balance three-phase electric energy.
Control system is also installed on housing, by controller, controls the number of turn that shunting switch K changes a winding, the electromagnetism exchange by winding, inversely adding reaches the effect of balance three-phase electric energy.
Described control system comprises current sensing means, voltage check device, winding temperature detection module, electrical quantity sensor and controller, voltage check device, current sensing means, winding temperature detection module, electrical quantity sensor is connected with signal with controller, the voltage parameter that current sensing means and voltage check device detect, current parameters, through electrical quantity sensor, pass to controller, winding temperature parameter passes to controller, voltage parameter, current parameters via controller calculates, the number of turn that changes first side winding by controlling shunting switch K after analysis is carried out operational mode conversion.
Three core limbs of three-limb core are respectively R, S, T, have respectively four windings on three core limbs, are respectively: primary side LR1, LR2, LS1, LS2, LT1, LT2, secondary side LR3, LR4, LS3, LS4, LT3, LT4; Each winding of three-phase primary side has respectively five taps, and each sub-winding tap is connected with respectively on-load shunting switch; The connected mode of LR1, each tap of LS2 is: A11 connects B21 by load tap changer K, A12 connects B22 by load tap changer K, A13 connects B23 by load tap changer K, and A14 connects B24 by load tap changer K, and A15 connects B25 by load tap changer K; The connected mode of LS1, each tap of LT2 is: B11 connects C21 by load tap changer K, B12 connects C22 by load tap changer K, B13 connects C23 by load tap changer K, and B14 connects C24 by load tap changer K, and B15 connects C25 by load tap changer K; LT1, LR2 connected mode are: C11 connects A21 by load tap changer K, C12 connects A22 by load tap changer K, C13 connects A23 by load tap changer K, and C14 connects A24 by load tap changer K, and C15 connects A25 by load tap changer K; Three-phase secondary side connected mode is: LR3 tail end is connected with LS4 head end, and LS3 tail end is connected with LT4 head end, and LT3 tail end is connected with LR4 head end.
Described voltage parameter is input voltage UA, UB, UC, output voltage U a, the Ub of three phase windings, the Uc of three phase windings, described current parameters is three-phase current Ia, Ib, Ic, described winding temperature parameter is the temperature of three phase windings, and the temperature-sensitive element of described winding temperature detection module is located in the interior transformer oil of housing of transformer.
Described operational mode comprises operational mode 1, operational mode 2, operational mode 3, operational mode 4, operational mode 5, described operational mode conversion carries out pattern conversion when output line voltage is not within the scope of 360V and 400V, and output voltage is returned within the scope of 360V and 400V; Described operational mode 1 is that pressure regulation+6% on load tap changer K operates in A11 and B21 connects, and B11 and C 21 connect, and C11 and A21 connect; Operational mode 2 is that pressure regulation+3% on load tap changer operates in A12 and B22 connects, and B12 and C 22 connect, and C12 and A22 connect; Operational mode 3 not voltage regulating loading tap changer operate in A13 and B23 and connect, B13 and C 23 connect, C13 and A23 connection; Operational mode 4 is that pressure regulation-3% on load tap changer operates in A14 and B24 connects, and B14 and C 24 connect, and C14 and A24 connect; Operational mode 5 is that pressure regulation-6% on load tap changer operates in A15 and B25 connects, and B15 and C 25 connect, and C15 and A25 connect.
Described on load tap changer is five grades of shunting switchs, one grade of shunting switch, five kinds of operational modes of second gear, third gear, fourth gear, the five grades of corresponding 10kv intelligence of difference energy balance distribution transformers; When winding temperature higher than set 120 ° of C time, 10kv intelligence energy balance distribution transformer automatically switches to operational mode 3.
Claims (7)
1. 10kv intelligence energy balance distribution transformer, comprise housing, three-limb core and three phase windings, three phase windings divide winding and secondary winding, three inputs of a winding connect respectively on high-tension side A phase, B phase, C phase, four outputs of secondary winding are respectively a phase, b phase, c phase, o line, it is characterized in that, on load tap changer is installed on housing, one time winding comprises a plurality of sub-windings, a plurality of sub-windings are wrapped in respectively on different core limbs, each sub-winding all has some taps, and the tap of sub-winding connects by load tap changer; Secondary winding also comprises a plurality of sub-windings, and a plurality of secondary sub-windings are also wrapped in respectively on different core limbs, changes the number of turn of a winding by shunting switch K, and the electromagnetism exchange by winding, inversely adding reaches the effect of balance three-phase electric energy.
2. 10kv according to claim 1 intelligence energy balance distribution transformer, it is characterized in that, control system is also installed on housing, by controller, controls the number of turn that shunting switch K changes a winding, the electromagnetism exchange by winding, inversely adding reaches the effect of balance three-phase electric energy.
3. 10kv according to claim 2 intelligence energy balance distribution transformer, it is characterized in that, described control system comprises current sensing means, voltage check device, winding temperature detection module, electrical quantity sensor and controller, voltage check device, current sensing means, winding temperature detection module, electrical quantity sensor is connected with signal with controller, the voltage parameter that current sensing means and voltage check device detect, current parameters, through electrical quantity sensor, pass to controller, winding temperature parameter passes to controller, voltage parameter, current parameters via controller calculates, the number of turn that changes first side winding by controlling shunting switch K after analysis is carried out operational mode conversion.
4. 10kv according to claim 3 intelligence energy balance distribution transformer, it is characterized in that, three core limbs of three-limb core are respectively R, S, T, on three core limbs, there are respectively four windings, be respectively: primary side LR1, LR2, LS1, LS2, LT1, LT2, secondary side LR3, LR4, LS3, LS4, LT3, LT4; Each winding of three-phase primary side has respectively five taps, and each sub-winding tap is connected with respectively on-load shunting switch; The connected mode of LR1, each tap of LS2 is: A11 connects B21 by load tap changer K, A12 connects B22 by load tap changer K, A13 connects B23 by load tap changer K, and A14 connects B24 by load tap changer K, and A15 connects B25 by load tap changer K; The connected mode of LS1, each tap of LT2 is: B11 connects C21 by load tap changer K, B12 connects C22 by load tap changer K, B13 connects C23 by load tap changer K, and B14 connects C24 by load tap changer K, and B15 connects C25 by load tap changer K; LT1, LR2 connected mode are: C11 connects A21 by load tap changer K, C12 connects A22 by load tap changer K, C13 connects A23 by load tap changer K, and C14 connects A24 by load tap changer K, and C15 connects A25 by load tap changer K; Three-phase secondary side connected mode is: LR3 tail end is connected with LS4 head end, and LS3 tail end is connected with LT4 head end, and LT3 tail end is connected with LR4 head end.
5. 10kv according to claim 3 intelligence energy balance distribution transformer, it is characterized in that, described voltage parameter is input voltage UA, UB, UC, output voltage U a, the Ub of three phase windings, the Uc of three phase windings, described current parameters is three-phase current Ia, Ib, Ic, described winding temperature parameter is the temperature of three phase windings, and the temperature-sensitive element of described winding temperature detection module is located in the interior transformer oil of housing of transformer.
6. 10kv according to claim 3 intelligence energy balance distribution transformer, it is characterized in that, described operational mode comprises operational mode 1, operational mode 2, operational mode 3, operational mode 4, operational mode 5, described operational mode conversion carries out pattern conversion when output line voltage is not within the scope of 360V and 400V, and output voltage is returned within the scope of 360V and 400V; Described operational mode 1 is that pressure regulation+6% on load tap changer K operates in A11 and B21 connects, and B11 and C 21 connect, and C11 and A21 connect; Operational mode 2 is that pressure regulation+3% on load tap changer operates in A12 and B22 connects, and B12 and C 22 connect, and C12 and A22 connect; Operational mode 3 not voltage regulating loading tap changer operate in A13 and B23 and connect, B13 and C 23 connect, C13 and A23 connection; Operational mode 4 is that pressure regulation-3% on load tap changer operates in A14 and B24 connects, and B14 and C 24 connect, and C14 and A24 connect; Operational mode 5 is that pressure regulation-6% on load tap changer operates in A15 and B25 connects, and B15 and C 25 connect, and C15 and A25 connect.
7. 10kv according to claim 6 intelligence energy balance distribution transformer, it is characterized in that, described on load tap changer is five grades of shunting switchs, one grade of shunting switch, five kinds of operational modes of second gear, third gear, fourth gear, the five grades of corresponding 10kv intelligence of difference energy balance distribution transformers; When winding temperature higher than set 120 ° of C time, 10kv intelligence energy balance distribution transformer automatically switches to operational mode 3.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5727009A (en) * | 1980-07-25 | 1982-02-13 | Toshiba Corp | Three-phase transformer |
| JPS6081811A (en) * | 1983-10-11 | 1985-05-09 | Meidensha Electric Mfg Co Ltd | On-load tap changing autotransformer |
| CN102360843A (en) * | 2011-05-31 | 2012-02-22 | 北京博瑞莱智能科技有限公司 | Distribution transformer capable of automatically adjusting capacitance and voltage |
| CN102545249A (en) * | 2012-03-07 | 2012-07-04 | 河北森蔚电气科技有限公司 | Dynamic balance energy system optimizing device |
| CN103219137A (en) * | 2013-03-26 | 2013-07-24 | 国家电网公司 | Self-adapted load type distribution transformer |
| CN203706832U (en) * | 2013-12-28 | 2014-07-09 | 河北森蔚电气科技有限公司 | 10kv intelligent energy balance distribution transformer |
-
2013
- 2013-12-28 CN CN201310735473.1A patent/CN103680884B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5727009A (en) * | 1980-07-25 | 1982-02-13 | Toshiba Corp | Three-phase transformer |
| JPS6081811A (en) * | 1983-10-11 | 1985-05-09 | Meidensha Electric Mfg Co Ltd | On-load tap changing autotransformer |
| CN102360843A (en) * | 2011-05-31 | 2012-02-22 | 北京博瑞莱智能科技有限公司 | Distribution transformer capable of automatically adjusting capacitance and voltage |
| CN102545249A (en) * | 2012-03-07 | 2012-07-04 | 河北森蔚电气科技有限公司 | Dynamic balance energy system optimizing device |
| CN103219137A (en) * | 2013-03-26 | 2013-07-24 | 国家电网公司 | Self-adapted load type distribution transformer |
| CN203706832U (en) * | 2013-12-28 | 2014-07-09 | 河北森蔚电气科技有限公司 | 10kv intelligent energy balance distribution transformer |
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