CN103986386B - Low pressure automatic Regulation medium-small type distribution transformers - Google Patents
Low pressure automatic Regulation medium-small type distribution transformers Download PDFInfo
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- CN103986386B CN103986386B CN201410248673.9A CN201410248673A CN103986386B CN 103986386 B CN103986386 B CN 103986386B CN 201410248673 A CN201410248673 A CN 201410248673A CN 103986386 B CN103986386 B CN 103986386B
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- switch
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- tap changer
- solenoid
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Abstract
The present invention relates to a kind of low pressure automatic Regulation medium-small type distribution transformers, it is made up of transformer core, transformer coil and regulator.Transformer coil is made up of primary winding and secondary coil, regulator is arranged on the leading-out terminal of secondary coil, and connect with secondary coil lead-out wire, regulator is made up of tap changer and tap changer control circuit, tap changer is formed by two completely identical in structure bistable bidirectional switch combinations, tap changer control circuit, by voltage sampling circuit, is checked potential circuit, is cut-off exclusive circuit, one-chip computer and output circuit composition." step voltage " of secondary coil pressure regulation of the present invention is low, and control circuit is simple, uses thyristor voltage regulation permutator switch transition, it is achieved without arc on-load voltage regulation；The switch contact life-span is long；Solenoid can be pulse current, not only saves energy, and greatly reduces coil burnout fault, extends switch life.
Description
Technical field
The present invention relates to a kind of medium-small type distribution transformers, particularly to a kind of low pressure automatic Regulation medium-small type distribution transformers, the quality of power supply and using electricity wisely that improve vast middle-size and small-size power consumer will be played an important role by it.
Background technology
nullIt is known that，Voltage on power distribution network is the biggest on user power utilization impact，The vertical deviation of voltage decides service life of electrical equipment and loss and the quality etc. of product，Different due to the use electrical characteristics of user again，The access distribution of the most scattered or single-phase load，The voltage pulsation making distribution network is frequent，Electrical network self pressure regulation usefulness is also subject to certain restrictions simultaneously，This distribution transformer being accomplished by user side carries out effective Voltage Cortrol，It is both provided with tap changer on the most nearly all first wife's piezoelectric transformer，But most distribution transformers are old-fashioned non-excitation pressure adjustments，Namely must could manual voltage regulation under distribution transformer power down mode，And this voltage regulating mode power failure formality is complicated、Voltage regulation result is poor，Affect electricity consumption，Dynamic voltage adjustment can not be carried out constantly，The most just adjust overvoltage shelves level，Owing to the voltage on circuit changes again，Carry out pressure regulation operation again，Since so, this voltage regulating mode does not catches up with the most far away the change of voltage on circuit，Therefore people are the most just rarely employed this switch and carry out actual pressure regulation，The most this non-excitation pressure adjustment has little significance.Along with socioeconomic high speed development, the raising of people's living standard, the requirement to the quality of power supply gradually promotes, and adds the main trend of energy-conserving and environment-protective, has load or automatic Regulation functional requirement the strongest to transformator；Next it is worth mentioning that voltage regulation coil lead-in wire thickness on tap changer capacity and is affected the biggest by transformer current size, and then affect inside transformer structure and size, what first the most all adjustable transformers selected is at high voltage regulation, but the most promising shortcoming making up non-excitation pressure adjustment switch, it is additionally arranged " stabilized voltage supply device " at distribution transformer low tension outlet, but this installation cost is high, and itself has again certain electric energy loss.
Summary of the invention
It is an object of the invention to develop a kind of low pressure automatic Regulation medium-small type distribution transformers for problem above, its object is to solve a large amount of Transformer automatic Regulation needs of problems, make medium and small distribution transformer realize pressure regulation simplification, automatization.
The solution of the present invention is: medium-small type distribution transformers on high-tension side+(-) the non-excitation pressure adjustment device of 5% removes, change into step down side set up+(-) voltage regulation coil of 5% being drawn by low-tension bushing, be then connected to automatic pressure regulating switch.Tap changer uses the bistable state contact power down switch of mutual locking.Control circuit uses Single-chip Controlling, and its switch operation mechanism is driven by contactless ac-dc conversion.
The present invention is realized in, low pressure automatic Regulation medium-small type distribution transformers, by transformer core, transformer coil and regulator are constituted, feature is, transformer coil is made up of primary winding and secondary coil, regulator is arranged on the leading-out terminal of secondary coil, and connect with secondary coil lead-out wire, described regulator is made up of tap changer and tap changer control circuit, tap changer is formed by two completely identical in structure bistable bidirectional switch combinations, two bistable bidirectionals switch the switch by solenoid and integration actuating mechanism and drive thereof and constitute, equipped with bistable state snap close in integration actuating mechanism, solenoid is fixed on framework；
Further, described tap changer control circuit is by voltage sampling circuit, checking potential circuit, cut-off exclusive circuit, one-chip computer and output circuit composition, output circuit is two thyristor voltage regulation permutator output circuits being made up of transistor, output resistance, current-limiting resistance and thyristor voltage regulation permutator respectively.
Beneficial effect of the present invention
1, " step voltage " of the pressure regulation of distribution transformer low-pressure secondary coil is low, and the switch contact distance of bistable bidirectional switch is near, and double employing thyristor voltage regulation permutator switch transitions easily realize without arc on-load voltage regulation；
2, tap changer uses contact butt contact, and the switch contact life-span is long；
3, the solenoid of bistable bidirectional switch can be pulse current, not only saves energy, and greatly reduces coil burnout fault, extends switch life；
4, bistable bidirectional switch uses Bidirectional interlocking integrative-structure, and the probability making voltage regulation coil short circuit is minimum, and control circuit is simple；
5, action is fast, and general movement time completed at about 0.1 second.
Accompanying drawing explanation
Fig. 1 is the pressure regulation elementary diagram of secondary coil of the present invention；
Fig. 2 is the bistable bidirectional construction of switch schematic diagram of the present invention；
Fig. 3 is the tap changer control circuit electrical schematic diagram of the present invention.
Detailed description of the invention
nullA kind of low pressure automatic Regulation medium-small type distribution transformers，By transformer core、Transformer coil and regulator are constituted，Transformer coil is made up of primary winding and secondary coil，Wherein，Regulator is arranged on the leading-out terminal of secondary coil，And with secondary coil lead-out wire 1、2、3 connect，Described regulator is made up of tap changer and tap changer control circuit，Tap changer is formed by two completely identical in structure bistable bidirectional switch combinations，One bistable bidirectional switchs by the first solenoid、First integration actuating mechanism 6 and two switches driven thereof are constituted，K1、K2 is two switch movable contacts，K12、K22 is the stationary contact that two switch movable contacts are corresponding，Another bistable bidirectional switchs by the second solenoid、Second integration actuating mechanism 15 and two switches driven thereof are constituted，K4、K3 is two switch movable contacts，K42、K32 is the stationary contact that two switch movable contacts are corresponding，It is respectively arranged with in first integration actuating mechanism 6 and the second integration actuating mechanism 15 and has fixed the first integration actuating mechanism 6 and bistable state snap close 7 of the second integration actuating mechanism 15 operating position effect，Bistable state snap close 7 is fixed on framework 4，First solenoid、Second solenoid is fixed on framework 4.
Tap changer control circuit is by voltage sampling circuit 8, check potential circuit 9, cut-off exclusive circuit 10, one-chip computer 11 and output circuit composition, output circuit is the thyristor voltage regulation permutator output circuit that two (alternatively four) are made up of transistor, output resistance, current-limiting resistance and thyristor voltage regulation permutator respectively, and the output of thyristor voltage regulation permutator connects the solenoid of bistable bidirectional switch.
The switch movable contact K1 and switch stationary contact point K12 of regulator bistable bidirectional switch meets the switch movable contact K2 of secondary coil lead-out wire 1 regulator bistable bidirectional switch, switch stationary contact point K22 and switch movable contact K4 and switch stationary contact point K42 series connection is followed by secondary coil lead-out wire 2, the switch movable contact K2 switched with bistable bidirectional after first current-limiting resistance R1 and IGCT 16 series connection, switch stationary contact point K22 and switch movable contact K4, parallel connection after switch stationary contact point K42 series connection, the switch movable contact K3 and switch stationary contact point K32 of bistable bidirectional switch connect secondary coil lead-out wire 3.
The invention will be further described below in conjunction with the accompanying drawings.
As shown in Figure 1.The present invention, low pressure automatic Regulation medium-small type distribution transformers, it is made up of transformer core, transformer coil and regulator, transformer coil is made up of primary winding and secondary coil, regulator is arranged on the leading-out terminal of secondary coil, and connect with secondary coil lead-out wire 1,2,3, seeing Fig. 1, the switch movable contact K1 and switch stationary contact point K12 of regulator bistable bidirectional switch connect secondary coil lead-out wire 1；The switch movable contact K2 of regulator bistable bidirectional switch, switch stationary contact point K22 and switch movable contact K4 and switch stationary contact point K42 series connection is followed by secondary coil lead-out wire 2, the switch movable contact K2 switched with bistable bidirectional after first current-limiting resistance R1 and IGCT 16 series connection, switch stationary contact point K22 and switch movable contact K4, parallel connection after switch stationary contact point K42 series connection, namely first current-limiting resistance R1 and IGCT 16 series connection after be connected in parallel on bistable bidirectional switch switch movable contact K2, switch stationary contact point K22 and switch movable contact K4, two ends after switch stationary contact point K42 series connection, shield；The switch movable contact K3 and switch stationary contact point K32 of bistable bidirectional switch connect secondary coil lead-out wire 3；
As shown in Figure 2.Described regulator is made up of tap changer and tap changer control circuit, tap changer is formed by two completely identical in structure bistable bidirectional switch combinations, see Fig. 2, one bistable bidirectional switchs by the first solenoid 5, first integration actuating mechanism 6 and two switches driven thereof are constituted, K1, K2 is two switch movable contacts, K12, K22 is the stationary contact that two switch movable contacts are corresponding, another bistable bidirectional switchs by the second solenoid 14, second integration actuating mechanism 15 and two switches driven thereof are constituted, K4, K3 is two switch movable contacts, K42, K32 is the stationary contact that two switch movable contacts are corresponding；It is respectively arranged with bistable state snap close 7 in first integration actuating mechanism 6 and the second integration actuating mechanism 15, bistable state snap close 7 plays fixes the first integration actuating mechanism 6 and the second integration actuating mechanism 15 operating position effect, bistable state snap close 7 can be fixed on framework 4, and solenoid 5,14 is fixed on framework 4；
As shown in Figure 3, described tap changer control circuit is by voltage sampling circuit 8, check potential circuit 9, cut-off exclusive circuit 10, one-chip computer 11 and output circuit composition, output circuit is two thyristor voltage regulation permutator output circuits being made up of transistor, output resistance, current-limiting resistance and thyristor voltage regulation permutator respectively, first output circuit is constituted output circuit by transistor T1, output circuit R2, current-limiting resistance R3 and thyristor voltage regulation permutator 12, and its output connects the solenoid 5 of bistable bidirectional switch；The output circuit that second output circuit is made up of transistor seconds T2, output resistance R4, current-limiting resistance R5 and thyristor voltage regulation permutator 13, its output connects the solenoid 14 of bistable bidirectional switch；
Its operation principle is, by voltage sampling circuit 8, check potential circuit 9, cut-off exclusive circuit 10 and sample, sampled signal is sent into one-chip computer 11, one-chip computer 11 exports according to signal power size, or make transistor T1 work, or make transistor T2 work, even also first group of solenoid 5 obtains electric, or second group of solenoid 14 obtains electric, solenoid obtains electric, and band movement and motor-driven integrative actuating mechanism works, and makes switch movable contact and switch stationary contact point cantact or disconnection, make tap changer work, be able to pressure regulation.
It will be clear that the above-mentioned phase pressure regulation for the present invention, the three phase voltage regulating principle of the present invention is identical with structure.
Claims (1)
- null1. a low pressure automatic Regulation medium-small type distribution transformers，By transformer core、Transformer coil and regulator are constituted，It is characterized in that，Transformer coil is made up of primary winding and secondary coil，Regulator is arranged on the leading-out terminal of secondary coil，And with secondary coil the first lead-out wire (1)、Secondary coil the second lead-out wire (2)、Secondary coil the 3rd lead-out wire (3) connects，Described regulator is made up of tap changer and tap changer control circuit，Tap changer is formed by two completely identical in structure bistable bidirectional switch combinations，First bistable bidirectional switchs by the first solenoid (5)、First integration actuating mechanism (6) and two switches driven thereof are constituted，K1、K2 is two switch movable contacts，K12、K22 is the stationary contact that two switch movable contacts are corresponding，Second bistable bidirectional switchs by the second solenoid (14)、Second integration actuating mechanism (15) and two switches driven thereof are constituted，K4、K3 is two switch movable contacts，K42、K32 is the stationary contact that two switch movable contacts are corresponding，It is respectively arranged with in first integration actuating mechanism (6) and the second integration actuating mechanism (15) and has fixed the first integration actuating mechanism (6) and the bistable state snap close (7) of the second integration actuating mechanism (15) operating position effect，Bistable state snap close (7) is fixed on framework (4)，First solenoid (5)、Second solenoid (14) is separately fixed on framework (4)；Tap changer control circuit is by voltage sampling circuit (8), check potential circuit (9), cut-off exclusive circuit (10), one-chip computer (11) and the first thyristor voltage regulation permutator output circuit, the second thyristor voltage regulation permutator output circuit composition, first thyristor voltage regulation permutator output circuit is made up of IGCT T1, output resistance R2, current-limiting resistance R3 and thyristor voltage regulation permutator 12, and its output connects first solenoid (5) of the first bistable bidirectional switch；Second thyristor voltage regulation permutator output circuit is made up of transistor T2, output resistance R4, current-limiting resistance R5 and thyristor voltage regulation permutator 13, and its output connects second solenoid (14) of the second bistable bidirectional switch；Switch movable contact K1 and switch stationary contact point K12 connects secondary coil the first lead-out wire (1), switch movable contact K2, switch stationary contact point K22 and switch movable contact K4, switch stationary contact point K42 series connection is followed by secondary coil the second lead-out wire (2), being connected in parallel on the two ends after switch movable contact K2, switch stationary contact point K22 and switch movable contact K4, switch stationary contact point K42 series connection after first current-limiting resistance R1 and IGCT 16 series connection, switch movable contact K3 and switch stationary contact point K32 connects secondary coil the 3rd lead-out wire (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410248673.9A CN103986386B (en) | 2014-06-06 | 2014-06-06 | Low pressure automatic Regulation medium-small type distribution transformers |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410248673.9A CN103986386B (en) | 2014-06-06 | 2014-06-06 | Low pressure automatic Regulation medium-small type distribution transformers |
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| Publication Number | Publication Date |
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| CN103986386A CN103986386A (en) | 2014-08-13 |
| CN103986386B true CN103986386B (en) | 2016-09-14 |
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| CN201410248673.9A Expired - Fee Related CN103986386B (en) | 2014-06-06 | 2014-06-06 | Low pressure automatic Regulation medium-small type distribution transformers |
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| US20170344039A1 (en) * | 2016-05-27 | 2017-11-30 | Cooper Technologies Company | Arcless Tap Changer Using Gated Semiconductor Devices |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN200986844Y (en) * | 2006-08-16 | 2007-12-05 | 李志学 | Transformer energy-saving device dedicated for road lamp |
| CN201011646Y (en) * | 2007-01-08 | 2008-01-23 | 孙晓菊 | Novel voltage-regulating and changeover switch |
| CN101527516B (en) * | 2008-03-05 | 2013-04-24 | 深圳诺尔科技股份有限公司 | Voltage varying-regulating circuit |
| CN103400710A (en) * | 2013-08-22 | 2013-11-20 | 秦宇翔 | Balanced leveling method for three-phase loads of low-voltage power network and automatic load transferring switch |
| CN204089666U (en) * | 2014-06-06 | 2015-01-07 | 李明明 | Low pressure automatic Regulation medium-small type distribution transformers |
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Granted publication date: 20160914 Termination date: 20170606 |