CN103680884B - 10kv intelligent energy balance distribution transformer - Google Patents
10kv intelligent energy balance distribution transformer Download PDFInfo
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- CN103680884B CN103680884B CN201310735473.1A CN201310735473A CN103680884B CN 103680884 B CN103680884 B CN 103680884B CN 201310735473 A CN201310735473 A CN 201310735473A CN 103680884 B CN103680884 B CN 103680884B
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Abstract
10kv Intelligent Energy balance distribution transformer, comprise housing, three-limb core and three-phase windings, three-phase windings divides a winding and secondary winding, three inputs of a winding connect on high-tension side A phase, B phase, C phase respectively, four outputs of secondary winding are respectively a phase, b phase, c phase, o line, housing is provided with on load tap changer, one time winding comprises multiple sub-winding, multiple sub-winding is wrapped on different core limbs respectively, each sub-winding all has some taps, and the tap of sub-winding is connected by load tap changer; Secondary winding also comprises multiple sub-winding, and multiple secondary sub-winding is also wrapped on different core limbs respectively, is changed the number of turn of a winding by shunting switch K, is exchanged, inversely adding reaches the effect of balance three-phase electric energy by the electromagnetism of winding.It can dynamic conditioning three-phase electric energy, reduction neutral line current.
Description
Technical field
The present invention relates to a kind of transformer, especially a kind of 10kv Intelligent 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 the load of three-phase system user is asymmetric often, unbalanced operation is common running status.As the electric locomotive in electric railway, the main frequency furnace of metallurgy industry etc. belong to typical single-phase load, and its electric current can reach even a few kilo-ampere of hundreds of peace, and the impact of negative-sequence current and zero-sequence current is quite serious.The asynchronism that residential quarter, larger office building, market single-phase load drop into, and low-voltage network construction retrofit and operation maintenance is not in place, result in low-voltage network three-phase load and distributes imbalance problem.And the existence of negative-sequence current is to transmission line and power consumption equipment; comprise transformer itself and create a series of harmful effect; as reduced the utilance of power-supply device; cause the additional heating of generator amature and vibration; the safe operation of harm power consumption equipment particularly induction motor; reduce power factor, increase line loss and voltage-drop, disturb and have impact on the correct operation etc. of relaying protection and automatics.The existence of zero-sequence current makes transformer fe produce zero sequence main flux in the heart, then produces zero-sqeuence potential, causes electromotive force triangle center point to be moved, causes Voltage unbalance.Cause zero line to transship, cause zero line line loss to generate heat and and then breaking out of fire.But, also there is no the transformer that can solve technical problem at present; Therefore, design a kind of can dynamic conditioning three-phase electric energy, reduce neutral line current 10kv Intelligent Energy balance distribution transformer, be the current technical issues that need to address.
Summary of the invention
Technical problem to be solved by this invention be to provide a kind of can dynamic conditioning three-phase electric energy, reduce neutral line current 10kv Intelligent Energy balance distribution transformer.
The technical scheme that the present invention solves its technical problem is:
10kv Intelligent Energy balance distribution transformer, comprise housing, three-limb core and three-phase windings, three-phase windings divides a winding and secondary winding, three inputs of a winding connect on high-tension side A phase, B phase, C phase respectively, four outputs of secondary winding are respectively a phase, b phase, c phase, o line, housing is provided with on load tap changer, one time winding comprises multiple sub-winding, multiple sub-winding is wrapped on different core limbs respectively, each sub-winding all has some taps, and the tap of sub-winding is connected by load tap changer; Secondary winding also comprises multiple sub-winding, and multiple secondary sub-winding is also wrapped on different core limbs respectively, is changed the number of turn of a winding by shunting switch K, is exchanged, inversely adding reaches the effect of balance three-phase electric energy by the electromagnetism of winding.
As a preferred embodiment of the present invention, housing is also provided with control system, controls by controller the number of turn that shunting switch K changes a winding, exchanged by the electromagnetism of 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, controller is passed to through electrical quantity sensor, winding temperature Parameter transfer is to controller, voltage parameter, current parameters via controller calculates, the number of turn changing first side winding by controlling shunting switch K after analyzing carries out operational mode conversion.
As a preferred embodiment of the present invention, three core limbs of three-limb core are respectively R, S, T, three core limbs have four windings respectively, is respectively: primary side LR1, LR2, LS1, LS2, LT1, LT2, secondary side LR3, LR4, LS3, LS4, LT3, LT4; The each winding of three-phase primary side has five taps respectively, and each sub-winding tap is connected to on-load shunting switch; The connected mode of each tap of LR1, LS2 is: A11 connects B21 by load tap changer K, A12 connects B22 by load tap changer K, A13 connects B23, A14 by load tap changer K and connects B25 by load tap changer K connection B24, A15 by load tap changer K; The connected mode of each tap of LS1, LT2 is: B11 connects C21 by load tap changer K, B12 connects C22 by load tap changer K, B13 connects C23, B14 by load tap changer K and connects C25 by load tap changer K connection C24, B15 by load tap changer K; LT1, LR2 connected mode is: C11 connects A21 by load tap changer K, C12 connects A22 by load tap changer K, C13 connects A23, C14 by load tap changer K and connects A25 by load tap changer K connection A24, C15 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 output voltage Ua, Ub, Uc of input voltage UA, the UB of three-phase windings, UC, three-phase windings, described current parameters is three-phase current Ia, Ib, Ic, described winding temperature parameter is the temperature of three-phase windings, in the housing that the temperature-sensitive element of described winding temperature detection module is located at transformer in transformer oil.
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, namely described operational mode conversion carries out patten transformation when output line voltage is not in 360V and 400V scope, makes output voltage return in 360V and 400V scope; Described operational mode 1 i.e. pressure regulation+6% on load tap changer K operates in A11 and B21 and connects, and B11 and C21 connects, and C11 and A21 connects; Operational mode 2 i.e. pressure regulation+3% on load tap changer operates in A12 and B22 and connects, and B12 and C22 connects, and C12 and A22 connects; Operational mode 3 namely not voltage regulating loading tap changer operate in A13 and B23 connect, B13 and C23 connect, C13 and A23 connection; Operational mode 4 i.e. pressure regulation-3% on load tap changer operates in A14 and B24 and connects, and B14 and C24 connects, and C14 and A24 connects; Operational mode 5 i.e. pressure regulation-6% on load tap changer operates in A15 and B25 and connects, and B15 and C25 connects, and C15 and A25 connects.
As a preferred embodiment of the present invention, described on load tap changer is five grades of shunting switchs, one grade of shunting switch, second gear, third gear, fourth gear, five grades of difference corresponding 10kv Intelligent Energy balance distribution transformers five kinds of operational modes; When winding temperature is higher than the 120 ° of C set, 10kv Intelligent Energy balance distribution transformer automatically switches to operational mode 3.
Above-mentioned just a kind of embodiment of the present invention, if when three-phase voltage, current imbalance phenomenon are larger, can increase the quantity of centre tap on winding and on load tap changer, the present invention can have more operational mode simultaneously.
Compared with prior art, the present invention can dynamic conditioning three-phase electric energy, reduce neutral line current, that one is suitable for because the electricity consumption of electrical network three-phase is uneven and causes three-phase voltage, current imbalance, neutral line current increases the operating mode of phenomenon (as steel mill, petrochemical industry, cement mining industry, large scale business place hotel, office building, supermarket and plaza lighting, large-scale synthesis place is as school, hospital, residential quarter), the Intelligent Energy balancing electric power transformer used, it can be manual, automatic adjustment three-phase voltage, electric current makes it tend to balance, reduce neutral line current, load moment is run under power save mode, 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 Intelligent Energy balance distribution transformer, comprise housing, three-limb core and three-phase windings, three-phase windings divides a winding and secondary winding, three inputs of a winding connect on high-tension side A phase, B phase, C phase respectively, four outputs of secondary winding are respectively a phase, b phase, c phase, o line, housing is provided with on load tap changer, one time winding comprises multiple sub-winding, multiple sub-winding is wrapped on different core limbs respectively, each sub-winding all has some taps, and the tap of sub-winding is connected by load tap changer; Secondary winding also comprises multiple sub-winding, and multiple secondary sub-winding is also wrapped on different core limbs respectively, is changed the number of turn of a winding by shunting switch K, is exchanged, inversely adding reaches the effect of balance three-phase electric energy by the electromagnetism of winding.
Housing is also provided with control system, controls by controller the number of turn that shunting switch K changes a winding, exchanged by the electromagnetism of 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, controller is passed to through electrical quantity sensor, winding temperature Parameter transfer is to controller, voltage parameter, current parameters via controller calculates, the number of turn changing first side winding by controlling shunting switch K after analyzing carries out operational mode conversion.
Three core limbs of three-limb core are respectively R, S, T, three core limbs have four windings respectively, is respectively: primary side LR1, LR2, LS1, LS2, LT1, LT2, secondary side LR3, LR4, LS3, LS4, LT3, LT4; The each winding of three-phase primary side has five taps respectively, and each sub-winding tap is connected to on-load shunting switch; The connected mode of each tap of LR1, LS2 is: A11 connects B21 by load tap changer K, A12 connects B22 by load tap changer K, A13 connects B23, A14 by load tap changer K and connects B25 by load tap changer K connection B24, A15 by load tap changer K; The connected mode of each tap of LS1, LT2 is: B11 connects C21 by load tap changer K, B12 connects C22 by load tap changer K, B13 connects C23, B14 by load tap changer K and connects C25 by load tap changer K connection C24, B15 by load tap changer K; LT1, LR2 connected mode is: C11 connects A21 by load tap changer K, C12 connects A22 by load tap changer K, C13 connects A23, C14 by load tap changer K and connects A25 by load tap changer K connection A24, C15 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 output voltage Ua, Ub, Uc of input voltage UA, the UB of three-phase windings, UC, three-phase windings, described current parameters is three-phase current Ia, Ib, Ic, described winding temperature parameter is the temperature of three-phase windings, in the housing that the temperature-sensitive element of described winding temperature detection module is located at transformer in transformer oil.
Described operational mode comprises operational mode 1, operational mode 2, operational mode 3, operational mode 4, operational mode 5, namely described operational mode conversion carries out patten transformation when output line voltage is not in 360V and 400V scope, makes output voltage return in 360V and 400V scope; Described operational mode 1 i.e. pressure regulation+6% on load tap changer K operates in A11 and B21 and connects, and B11 and C21 connects, and C11 and A21 connects; Operational mode 2 i.e. pressure regulation+3% on load tap changer operates in A12 and B22 and connects, and B12 and C22 connects, and C12 and A22 connects; Operational mode 3 namely not voltage regulating loading tap changer operate in A13 and B23 connect, B13 and C23 connect, C13 and A23 connection; Operational mode 4 i.e. pressure regulation-3% on load tap changer operates in A14 and B24 and connects, and B14 and C24 connects, and C14 and A24 connects; Operational mode 5 i.e. pressure regulation-6% on load tap changer operates in A15 and B25 and connects, and B15 and C25 connects, and C15 and A25 connects.
Described on load tap changer is five grades of shunting switchs, one grade of shunting switch, second gear, third gear, fourth gear, five grades of difference corresponding 10kv Intelligent Energy balance distribution transformers five kinds of operational modes; When winding temperature is higher than the 120 ° of C set, 10kv Intelligent Energy balance distribution transformer automatically switches to operational mode 3.
Claims (4)
1.10kv Intelligent Energy balance distribution transformer, comprise housing, three-limb core and three-phase windings, three-phase windings divides a winding and secondary winding, three inputs of a winding connect on high-tension side A phase, B phase, C phase respectively, four outputs of secondary winding are respectively a phase, b phase, c phase, o line, it is characterized in that, housing is provided with on load tap changer, one time winding comprises multiple sub-winding, multiple sub-winding is wrapped on different core limbs respectively, each sub-winding all has some taps, and the tap of sub-winding is connected by load tap changer, secondary winding also comprises multiple sub-winding, and multiple secondary sub-winding is also wrapped on different core limbs respectively, is changed the number of turn of a winding by shunting switch K, is exchanged, inversely adding reaches the effect of balance three-phase electric energy by the electromagnetism of winding, housing is also provided with control system, controls by controller the number of turn that shunting switch K changes a winding, exchanged by the electromagnetism of 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, controller is passed to through electrical quantity sensor, winding temperature Parameter transfer is to controller, voltage parameter, current parameters via controller calculates, the number of turn changing first side winding by controlling shunting switch K after analyzing carries out operational mode conversion, three core limbs of three-limb core are respectively R, S, T, three core limbs have four windings respectively, is respectively: primary side LR1, LR2, LS1, LS2, LT1, LT2, secondary side LR3, LR4, LS3, LS4, LT3, LT4, the each winding of three-phase primary side has five taps respectively, and each sub-winding tap is connected to on-load shunting switch, the connected mode of each tap of LR1, LS2 is: A11 connects B21 by load tap changer K, A12 connects B22 by load tap changer K, A13 connects B23, A14 by load tap changer K and connects B25 by load tap changer K connection B24, A15 by load tap changer K, the connected mode of each tap of LS1, LT2 is: B11 connects C21 by load tap changer K, B12 connects C22 by load tap changer K, B13 connects C23, B14 by load tap changer K and connects C25 by load tap changer K connection C24, B15 by load tap changer K, LT1, LR2 connected mode is: C11 connects A21 by load tap changer K, C12 connects A22 by load tap changer K, C13 connects A23, C14 by load tap changer K and connects A25 by load tap changer K connection A24, C15 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.
2. 10kv Intelligent Energy balance distribution transformer according to claim 1, it is characterized in that, described voltage parameter is output voltage Ua, Ub, Uc of input voltage UA, the UB of three-phase windings, UC, three-phase windings, described current parameters is three-phase current Ia, Ib, Ic, described winding temperature parameter is the temperature of three-phase windings, in the housing that the temperature-sensitive element of described winding temperature detection module is located at transformer in transformer oil.
3. 10kv Intelligent Energy balance distribution transformer according to claim 1, it is characterized in that, described operational mode comprises operational mode 1, operational mode 2, operational mode 3, operational mode 4, operational mode 5, namely described operational mode conversion carries out patten transformation when output line voltage is not in 360V and 400V scope, makes output voltage return in 360V and 400V scope; Described operational mode 1 i.e. pressure regulation+6% on load tap changer K operates in A11 and B21 and connects, and B11 and C21 connects, and C11 and A21 connects; Operational mode 2 i.e. pressure regulation+3% on load tap changer operates in A12 and B22 and connects, and B12 and C22 connects, and C12 and A22 connects; Operational mode 3 namely not voltage regulating loading tap changer operate in A13 and B23 connect, B13 and C23 connect, C13 and A23 connection; Operational mode 4 i.e. pressure regulation-3% on load tap changer operates in A14 and B24 and connects, and B14 and C24 connects, and C14 and A24 connects; Operational mode 5 i.e. pressure regulation-6% on load tap changer operates in A15 and B25 and connects, and B15 and C25 connects, and C15 and A25 connects.
4. 10kv Intelligent Energy balance distribution transformer according to claim 3, it is characterized in that, described on load tap changer is five grades of shunting switchs, one grade of shunting switch, second gear, third gear, fourth gear, five grades of difference corresponding 10kv Intelligent Energy balance distribution transformers five kinds of operational modes; When winding temperature is higher than the 120 ° of C set, 10kv Intelligent Energy balance distribution transformer automatically switches to operational mode 3.
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| CN201310735473.1A CN103680884B (en) | 2013-12-28 | 2013-12-28 | 10kv intelligent energy balance distribution transformer |
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| CN103680884B true CN103680884B (en) | 2015-12-02 |
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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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