CN103812104B - The compensation low-pressure adjusting depressor of adjustable magnetic - Google Patents
The compensation low-pressure adjusting depressor of adjustable magnetic Download PDFInfo
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- CN103812104B CN103812104B CN201410073306.XA CN201410073306A CN103812104B CN 103812104 B CN103812104 B CN 103812104B CN 201410073306 A CN201410073306 A CN 201410073306A CN 103812104 B CN103812104 B CN 103812104B
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Abstract
The invention discloses a kind of compensation low-pressure adjusting depressor of adjustable magnetic, including a compensation adjustable transformer TB；Described compensation adjustable transformer TB includes an a winding L1 and Secondary Winding L2；Described Secondary Winding L2 is connected in the live wire L of main circuit；A described winding L1 includes first coil and the second coil；The input of the junction point I of first coil and the zero line N of described main circuit is connected, and the outfan of described junction point I ' and the zero line N of described main circuit is connected；It is connected by switch K3 between described junction point I1 with described junction point I1 ', is connected by switch K2 between described junction point I2 with described junction point I2 ', be connected by switch K1 between described junction point I3 with described junction point I3 '.The compensation low-pressure adjusting depressor of adjustable magnetic of the present invention, have eliminate in conventional compensation formula pressure regulator adjustable transformer, reduce voltage adjusting device cost of manufacture and running wastage, power supply quality, high reliability can be improved.
Description
Technical field
The present invention relates to a kind of pressure regulator, the compensation low-pressure adjusting depressor of especially a kind of adjustable magnetic for power distribution networks.
Background technology
Along with developing rapidly of China's rural economy, rural power grids scale constantly increases.Although each electric company all actively adopts measures, but the swift and violent power consumption increased is powered with current electric grid and electric network composition differs greatly, causing rural power grids low-voltage problem extremely serious, low-voltage complains phenomenon extremely widespread, takes which kind of measure to solve current low-voltage problem extremely urgent.
Current low-voltage control measures has: (1) installs autotransformer boosting；(2) the distribution transformer output voltage boosting of platform district is heightened；(3) extending 10kV circuit, newly-increased distribution transformer boosting (4) takes to install the compensation pressure regulator boosting of low-voltage circuit.
Longer for 400V circuit, 10kV circuit extend less than region, take install the compensation pressure regulator of low pressure long distance line be reasonable selection, compensation pressure regulator compared with above 4 kinds of low-voltage control measures, the advantage possessing the following aspects:
(1) with reactive-load compensation boosting contrast；
Reactive-load compensation can reduce apparent current, reduces line drop, thus indirectly reaching the purpose of boosting, thus it is subject to the impact of low-voltage circuit power factor relatively greatly, there is bigger limitation；
(2) with autotransformer boosting contrast；
Directly being boosted by autotransformer, under identical capacity situation, device consumptive material is many, and weight is big, and volume is big, and not only cost is high, and due to Heavy Weight, installation cost is also greatly increased；
(3) with heighten the boosting contrast of platform district distribution transformer output voltage；
By heightening the output voltage of platform district distribution transformer, it is possible to solve the low-voltage problem of platform district nearby users, easily cause head end voltage but then higher, the low-voltage problem caused owing to radius of electricity supply is long can not be solved on the other hand；
(4) with extension 10kV circuit, newly-increased distribution transformer boosting contrast；
Adopt and extend 10kV circuit, the method for newly-increased distribution transformer, it is of course possible to solve the problem that voltage is low, but cost can be very high.
Therefore, adopt compensation pressure regulator to regulate the mode of voltage, be that one comparatively reasonably selects.
In prior art, compensation pressure regulator is made up of adjustable transformer TVV and compensator transformer TBa, as shown in Figure 2.The secondary windings in series of compensator transformer TBa is in main circuit, and phase place is identical with input voltage.Winding of compensator transformer TBa and adjustable transformer TVV connect, change a winding of compensator transformer Tba and the tap link position of adjustable transformer TVV, winding of compensator transformer Tba will input different voltage, the just sensing of the Secondary Winding of compensator transformer TBa creates bucking voltage Uba, as shown in Figure 2.If disregarding compensator transformer secondary impedance pressure drop, then as seen from Figure 2: output voltage Uao=input voltage Uai+ bucking voltage Uba；Wherein the size of bucking voltage UBa is provided by adjustable transformer Tba, and the pressure regulator of Fig. 2 is referred to as regulating compensation formula pressure regulator.This pressure regulator has been cooperated to pressure regulation by compensator transformer and adjustable transformer, indispensable.Calculate from economic benefit: compensator transformer capacity=voltage compensation percentage ratio * rated load-capacity (if namely voltage compensates 20%, then compensator transformer capacity is the 20% of load capacity), therefore can use the volume output that less volume control is bigger.Owing to this adjustable transformer is made up of compensator transformer and adjustable transformer, and compensator transformer and adjustable transformer capacity equal, the compensation capacity of these adjustable transformer capacity=2 times.Thus adding manufacturing cost.Calculating from social benefit: compensator transformer and adjustable transformer are running simultaneously, producing open circuit loss and load loss, thus adding operating cost simultaneously.
Summary of the invention
The present invention is for avoiding the weak point existed in above-mentioned prior art, it is provided that a kind of compensation low-pressure adjusting depressor of adjustable magnetic, to reduce the making of power distribution networks and operating cost and to improve power supply quality.
Present invention firstly provides a kind of compensation low-pressure adjusting depressor of adjustable magnetic.
The compensation low-pressure adjusting depressor of adjustable magnetic, it is structurally characterized in that, and including a compensation adjustable transformer TB and multiple switch, the plurality of switch includes switch K1, switch K2 and switch K3；Described compensation adjustable transformer TB includes a winding L1 and Secondary Winding L2；Described Secondary Winding L2 is connected in the live wire L of main circuit；A described winding L1 includes first coil L11 and the second coil L12；Described first coil L11 is disposed with four points of connection: I, I1, I2 and I3；Described second coil L12 is disposed with four points of connection: I ', I1 ', I2 ' and I3 '；The input of the junction point I of described first coil L11 and the zero line N of described main circuit is connected, and the outfan of the junction point I ' and the live wire L of described main circuit of described second coil L12 is connected；It is connected by switch K3 between described junction point I1 with described junction point I1 ', is connected by switch K2 between described junction point I2 with described junction point I2 ', be connected by switch K1 between described junction point I3 with described junction point I3 '.
The construction features of the compensation low-pressure adjusting depressor of adjustable magnetic of the present invention is embodied in following aspect:
Described switch is shoe contact formula switch.
Described switch is IGCT.
Described switch is AC/DC contactor.
Described compensation adjustable transformer TB is open dry-type transformer.
Compared with the prior art, beneficial effects of the present invention is embodied in:
The compensation low-pressure adjusting depressor of adjustable magnetic of the present invention, will be changed transformer flux by the working turns of a change winding of transformator, has reached to change the controlled effect of bucking voltage, eliminated the adjustable transformer in conventional compensation formula pressure regulator simultaneously.Save bigger manufacturing cost and machining period.Having saved the running wastage of adjustable transformer in conventional compensation formula pressure regulator simultaneously, and eliminated the operation noise of this transformator, social benefit is fine.
1), to absorb conventional compensation formula pressure regulator voltage regulation result good for the compensation low-pressure adjusting depressor of adjustable magnetic, capacity is big, the advantage of pressure regulation process not power-off, removes dual transformer combination, instead of regulating compensation formula with adjustable magnetic is compensation, owing to eliminating variac, reduce volume and weight, increase the scope of shunting voltage regulating, increase voltage-regulation gear, improve the voltage stabilizing ability of sub-connecting switch of transformer, improve pressure regulator reliability and stability.
2), the compensation low-pressure adjusting depressor of adjustable magnetic according to user's voltage regulation result and requirement, different classes of tap changer can be matched, can realize respectively voltage smooth adjustment, rapidly and efficiently with easy to operate voltage regulation result.
The compensation low-pressure adjusting depressor of adjustable magnetic of the present invention, have eliminate in conventional compensation formula pressure regulator adjustable transformer, reduce voltage adjusting device cost of manufacture and running wastage, power supply quality, high reliability can be improved.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the compensation low-pressure adjusting depressor of adjustable magnetic of the present invention.
Below by way of detailed description of the invention, and the invention will be further described in conjunction with accompanying drawing.
Such as Fig. 1, the compensation low-pressure adjusting depressor of adjustable magnetic, it includes a compensation adjustable transformer TB and multiple switch, and the plurality of switch includes switch K1, switch K2 and switch K3；Described compensation adjustable transformer TB includes a winding L1 and Secondary Winding L2；Described Secondary Winding L2 is connected in the live wire L of main circuit；A described winding L1 includes first coil L11 and the second coil L12；Described first coil L11 is disposed with four points of connection: I, I1, I2 and I3；Described second coil L12 is disposed with four points of connection: I ', I1 ', I2 ' and I3 '；The input of the junction point I of described first coil L11 and the zero line N of described main circuit is connected, and the outfan of the junction point I ' and the live wire L of described main circuit of described second coil L12 is connected；It is connected by switch K3 between described junction point I1 with described junction point I1 ', is connected by switch K2 between described junction point I2 with described junction point I2 ', be connected by switch K1 between described junction point I3 with described junction point I3 '.
As it is shown in figure 1, the Secondary Winding L2 compensating adjustable transformer TB is connected in main circuit, a end of Secondary Winding L2 is connected with the input of the live wire L of main circuit, and the x end of Secondary Winding L2 is connected with the outfan of the live wire L of main circuit；The input voltage of main circuit input is Uai, and the output voltage of main circuit outfan is Uao.By the circuit of Fig. 2 it is apparent that Uao=Uai+UTB；UTBFor compensating the voltage on the Secondary Winding L2 of adjustable transformer TB, i.e. bucking voltage.By switching the folding between K1-K3, it is possible to adjust the coil turn of a winding L1, and then realize the output voltage U of Secondary Winding L2TBAdjustment, thus achieving the adjustment of output end voltage Uao easily.
The compensation low-pressure adjusting depressor of adjustable magnetic only has adjusts a compensation adjustable transformer TB, the Secondary Winding L2 compensating adjustable transformer TB is connected in main circuit, phase place is identical with input voltage, the winding L1 and the main circuit outfan that compensate adjustable transformer TB connect, by switching the folding condition adjustment of K1-K3, compensation winding tap link position of adjustable transformer TB can be changed.According to Faraday law of electromagnetic induction:
When compensating adjustable transformer TB input side electromotive force and being constant, alternating flux to change therewith.The Secondary Winding compensating adjustable transformer TB is directly connected in the current supply circuit of main circuit, again according to formula
Bucking voltage to change therewith.Here it is the compensation transformer working principle of adjustable magnetic, being not only greatly improved in volume, weight, loss according to the transformator that this principle makes, transformer regulating effect and range of regulation are also greatly improved.The pressure regulation of transformator is to be completed by the method for change magnetic flux, is referred to as the compensation low-pressure adjusting depressor of adjustable magnetic.The compensation low-pressure adjusting depressor of adjustable magnetic of the present invention, the advantage that absorption compensation formula pressure regulator is effective, capacity is big, remove dual transformer pressure regulation combination, instead of regulating compensation formula pressure regulation with the compensation pressure regulation of adjustable magnetic, adjustable transformer need not be produced, reduce volume and weight, increase the scope of shunting voltage regulating, increase voltage-regulation gear, improve the voltage stabilizing ability of sub-connecting switch of transformer, improve electrical reliability.
Rear terminal voltage is played the effect of boosting, voltage stabilizing by adjustable magnetic compensation low-pressure adjusting depressor, thus ensureing power supply quality, improving rate of qualified voltage, need not extend 10KV circuit, does not need newly-increased distribution transformer.And being output as sine wave, disturb without harmonic wave, delivery efficiency is high, can long continuous operation, Short-time Overload can be born, overload capacity is strong, it is suitable for load extensive, operation (such as harmonic elimination, reactive-load compensation equipment) can be coordinated with various kinds of equipment, be well suited under high and medium power occasion and apply.
Described switch is shoe contact formula switch.
Described switch is IGCT.
Described switch is AC/DC contactor.
Described compensation adjustable transformer TB is open dry-type transformer.
According to user's requirement, pressure regulator can the multiple shifting switch of adapted.The compensation pressure regulator of adjustable magnetic can require apolegamy difference switch according to user type and pressure regulation, and applied range, voltage regulation result is good.
The compensation low-pressure adjusting depressor of adjustable magnetic, is characterized in that manufacture is simple, voltage regulation result is notable, and operation runs convenient and reliable, and according to user's range of regulation, arranging pressure regulation gear is 3 gears, uses K1, K2, K3 to control 3 target gears of pressure regulator respectively.K1, K2, K3 can be selected for different classes of switch, and which kind of specifically selects switch, and will require apolegamy according to load condition and pressure regulation.Concrete switchtype and Type Selection Principle are as follows:
1), pressure regulation required precision is higher occasion, can be selected for the smooth pressure regulation of shoe contact formula switch, pressure regulation process is careful steadily；
2), to pressure regulation rate request occasion faster, can be selected for IGCT high-speed switch and carry out dynamic voltage adjustment；
3), to great majority power user, and load is steady, is generally adopted AC/DC contactor pressure regulation, stable, good and cheap.
Compensate adjustable transformer TB takes following measures to carry out ensureing operational effect and service life in design and production process:
1), to compensate adjustable transformer TB be open dry-type transformer, adopts B level and the above class of insulation, can efficiently control transformer body volume and weight, for the transport of whole low-pressure adjusting depressor with install to provide and ensure.
2), the iron core of transformator adopt high magnetic conduction stalloy to manufacture, greatly reduce running noises, there is the higher feature of environmental protection.
3), the coil of transformator and the insulant class of insulation high, and consider the air flue that dispels the heat fully in the design, be effectively guaranteed transformator operational reliability and service life.
4), the iron core of transformator and metalwork have employed reliable anticorrosion process and process, improve the preserved levels of whole transformator, appearance looks elegant is generous, receives praises from customers.
The release of the compensation low-pressure adjusting depressor of adjustable magnetic of the present invention, low-voltage distribution electrical network for low voltage, power supply quality instability provides an economy, easily solution, both substantial amounts of human and material resources were saved for power department, provide a user with again reliable and stable power supply quality, thus greatly reducing the investment of the upgrading of rural power grids.
The compensation low-pressure adjusting depressor of adjustable magnetic of the present invention, is completed pressure regulation by a transformator, to reduce making and operating cost, improves electrical reliability.
Transformer flux will be changed by the working turns of a change winding of transformator, reached to change the controlled effect of bucking voltage, eliminated the adjustable transformer in conventional compensation formula pressure regulator simultaneously.Save bigger manufacturing cost and machining period.Having saved the running wastage of adjustable transformer in conventional compensation formula pressure regulator simultaneously, and eliminated the operation noise of this transformator, social benefit is fine.
In sum, the compensation transformator of adjustable magnetic is compared with traditional double transformator, with the obvious advantage, surmounts from production cost, production technology, installation maintenance, voltage regulation result and range of regulation aspect comprehensively, is the excellent low-voltage circuit low-voltage abatement equipment of a new generation.
Claims (5)
1. the compensation low-pressure adjusting depressor of adjustable magnetic, is characterized in that, including a compensation adjustable transformer TB and multiple switch, the plurality of switch includes switch K1, switch K2 and switch K3；Described compensation adjustable transformer TB includes a winding L1 and Secondary Winding L2；Described Secondary Winding L2 is connected in the live wire L of main circuit；A described winding L1 includes first coil L11 and the second coil L12；Described first coil L11 is disposed with four points of connection: I, I1, I2 and I3；Described second coil L12 is disposed with four points of connection: I ', I1 ', I2 ' and I3 '；The input of the junction point I of described first coil L11 and the zero line N of described main circuit is connected, and the outfan of the junction point I ' and the live wire L of described main circuit of described second coil L12 is connected；It is connected by switch K3 between described junction point I1 with described junction point I1 ', is connected by switch K2 between described junction point I2 with described junction point I2 ', be connected by switch K1 between described junction point I3 with described junction point I3 '.
2. the compensation low-pressure adjusting depressor of adjustable magnetic according to claim 1, is characterized in that, described switch is shoe contact formula switch.
3. the compensation low-pressure adjusting depressor of adjustable magnetic according to claim 1, is characterized in that, described switch is IGCT.
4. the compensation low-pressure adjusting depressor of adjustable magnetic according to claim 1, is characterized in that, described switch is AC/DC contactor.
5. the compensation low-pressure adjusting depressor of adjustable magnetic according to claim 1, is characterized in that, described compensation adjustable transformer TB is open dry-type transformer.
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| CN201410073306.XA CN103812104B (en) | 2014-02-28 | 2014-02-28 | The compensation low-pressure adjusting depressor of adjustable magnetic |
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| CN201410073306.XA CN103812104B (en) | 2014-02-28 | 2014-02-28 | The compensation low-pressure adjusting depressor of adjustable magnetic |
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| CN107146696A (en) * | 2017-06-27 | 2017-09-08 | 国网辽宁省电力有限公司鞍山供电公司 | Adjustable input voltage special transformer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1770584A (en) * | 2005-10-12 | 2006-05-10 | 广西大学 | Method for Compensating Coil for Dropping Induced Voltage and Contact Arc Suppression of Three-phase Voltage Stabilizing Control Device |
| CN102377350A (en) * | 2011-12-01 | 2012-03-14 | 西安爱科电子有限责任公司 | Voltage stabilizing device without harmonic pollution or instantaneous output voltage sag and voltage stabilizing method |
| CN203722233U (en) * | 2014-02-28 | 2014-07-16 | 合肥华威自动化有限公司 | Magnetic adjusting compensation type low-voltage regulator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2005210809A (en) * | 2004-01-21 | 2005-08-04 | Toshiba Corp | Power supply device of electric apparatus |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1770584A (en) * | 2005-10-12 | 2006-05-10 | 广西大学 | Method for Compensating Coil for Dropping Induced Voltage and Contact Arc Suppression of Three-phase Voltage Stabilizing Control Device |
| CN102377350A (en) * | 2011-12-01 | 2012-03-14 | 西安爱科电子有限责任公司 | Voltage stabilizing device without harmonic pollution or instantaneous output voltage sag and voltage stabilizing method |
| CN203722233U (en) * | 2014-02-28 | 2014-07-16 | 合肥华威自动化有限公司 | Magnetic adjusting compensation type low-voltage regulator |
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Denomination of invention: Adjustable-flux compensating low voltage regulator Effective date of registration: 20161220 Granted publication date: 20160706 Pledgee: Anhui Changfeng rural commercial bank Limited by Share Ltd new Bengbu Road Branch Pledgor: HEFEI HUAWEI AUTOMATION CO., LTD. Registration number: 2016340000112 |
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Date of cancellation: 20171101 Granted publication date: 20160706 Pledgee: Anhui Changfeng rural commercial bank Limited by Share Ltd new Bengbu Road Branch Pledgor: HEFEI HUAWEI AUTOMATION CO., LTD. Registration number: 2016340000112 |
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Denomination of invention: Low voltage regulator with magnetic compensation Effective date of registration: 20201118 Granted publication date: 20160706 Pledgee: Bank of Communications Ltd. Anhui branch Pledgor: HEFEI HUAWEI AUTOMATION Co.,Ltd. Registration number: Y2020980008234 |