CN103701136A - Automatic reactive compensation intelligent power distribution transformer - Google Patents
Automatic reactive compensation intelligent power distribution transformer Download PDFInfo
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- CN103701136A CN103701136A CN201310639642.1A CN201310639642A CN103701136A CN 103701136 A CN103701136 A CN 103701136A CN 201310639642 A CN201310639642 A CN 201310639642A CN 103701136 A CN103701136 A CN 103701136A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The invention discloses an automatic reactive compensation intelligent power distribution transformer which comprises three-phase high-voltage primary coils and three-phase secondary low-voltage secondary coils, wherein a group of taps is arranged on each high-voltage primary coil; three groups of taps are provided in all; the first group of the taps is connected with a first capacitor through the first tap switch of electronic tap switches; the second group of the taps is connected with a second capacitor through the second tap switch of the electronic tap switches; the third group of the taps is connected with a third capacitor through the third tap switch of the electronic tap switches; the electronic tap switches are connected with an electronic tap switch shift controller; the electronic tap switch shift controller is connected with a microcontroller; the signal input end of the microcontroller is connected with a three-phase voltage acquisition circuit and a three-phase current acquisition circuit. According to the transformer, the voltage of a capacitor end is regulated by utilizing the relationship of reactive power and voltage of the capacitors, so as to regulate the reactive power output to accomplish reactive power compensation.
Description
Technical field
The present invention relates to a kind of distribution transformer, relate in particular to a kind of auto-reactive compensation Intelligent distribution transformer.
Background technology
At present, distribution network var compensation is due to multi-point and wide-ranging, and load, natural power factor only has 0.6-0.7, and changes greatly, distribution reactive power compensation adopts fixed capacitor group and VQC(voltage power-less to control more) two kinds of ways, fixed capacitor compensation effect is bad; VQC device is owing to can not too much dividing into groups, moreover switching shoves and overvoltage has a strong impact on again the operation of device, and the VQC life-span is short, and moving unreliable is the problem of common existence.
Domestic Technology of Dynamic Reactive Power Compensation has SVC(Static Var Compensator), SVG(static reacance generator) technology such as grouping switching and voltage-regulation type dynamic passive compensation, some equipment is because investment is large, capacity greatly cannot be for distribution, some operational reliabilitys are poor, are applicable at present the dynamic reactive compensation device that distribution is used not yet completely.Described in specific as follows:
1, SVC(comprises thyristor-controlled reactor TCR and magnetic valve type controllable reactor MCR): it is to utilize regulative reactance and the combination of fixed capacity group, by regulating reactor capacity to reach dynamic change, meets system requirements.Its capacity relative is larger, and more than mostly being 1000kvar, investment is large, and in service have harmonic pollution, so cannot in distribution, use.
2, grouping switching device: it utilizes capacitor group technology, is divided into some groups by fixed capacitor, according to idle variation, carries out switching, realizes dynamic passive compensation.Its shortcoming is that switching shoves and overvoltage has a strong impact on the use of device, and be 3-5 useful life conventionally, and because grouping can not be too much meticulous, compensation effect is bad.
3, SVG utilizes thyristor inversion technology, by regulating the angle of flow to produce capacitive or perceptual idle.Due to technical sophistication, upper harmonic pollution in service is serious, also not application in distribution at present.
Therefore, develop new distribution Technology of Dynamic Reactive Power Compensation and device, be power supply department in the urgent need to.
Summary of the invention
The object of this invention is to provide a kind of auto-reactive compensation Intelligent distribution transformer, can complete preferably no-power compensation function.
The present invention adopts following technical proposals: a kind of auto-reactive compensation Intelligent distribution transformer, comprise three-phase high-voltage primary coil and three-phase time low-voltage secondary coil, also include electronic tap switch, electronic tap switch gear controller and microcontroller, on described every phase primary of high voltage coil, be provided with one group of tap, totally three groups of taps, wherein first group of tap connects the first capacitor by the first shunting switch of electronic tap switch, second group of tap connects the second capacitor by the second shunting switch of electronic tap switch, the 3rd group of tap is by the 3rd shunting switch connection the 3rd capacitor of electronic tap switch, the first described capacitor, the other end of the second capacitor and the 3rd capacitor links together, described electronic tap switch is connected with electronic tap switch gear controller, and described electronic tap switch gear controller is connected with microcontroller, and the signal input part of described microcontroller is connected with three-phase voltage Acquisition Circuit and three-phase current Acquisition Circuit.
Three groups of described taps have included 5-7 tap.
Described microcontroller is connected with communication unit.
The invention solves current reactive power compensation and adopt contactor opening-closing capacitor bank, and contactor easily burns out, working life is short, the shortcoming that maintenance workload is large.The present invention takes and diverse compensation principle in the past, utilizes the relation of capacitor reactive power and voltage, and by controlling the many taps of distribution transformer, thereby regulating capacitor terminal voltage regulates idle output, completes reactive power compensation.The present invention's working stability that is in operation, no-flashy-flow and overvoltage, capacitor working is pressed forever lower than rated voltage, and capacitor uses safe life long; No-harmonic wave pollution electrical network in operating mechanism row.
Accompanying drawing explanation
Fig. 1 is schematic block circuit diagram of the present invention;
Fig. 2 is the principle schematic of the control unit of electronic tap switch.
Embodiment
As shown in Figure 1 and Figure 2, the invention discloses a kind of auto-reactive compensation Intelligent distribution transformer, comprise three-phase high-voltage primary coil (A, B, C) and three-phase time low-voltage secondary coil (a, b, c), also include electronic tap switch, electronic tap switch gear controller and microcontroller, on described every phase primary of high voltage coil, be provided with one group of tap, totally three groups of taps, three groups of described taps have included 5-7 tap, and what in the present embodiment, adopt is 7 taps (1,2,3,4,5,6,7).Wherein first group of tap connects the first capacitor C1 by the first shunting switch of electronic tap switch, second group of tap connects the second capacitor C2 by the second shunting switch of electronic tap switch, the 3rd group of tap is by the 3rd shunting switch connection the 3rd capacitor C3 of electronic tap switch, and the other end of the first described capacitor C1, the second capacitor C2 and the 3rd capacitor C3 links together; Described electronic tap switch is connected with electronic tap switch gear controller, and described electronic tap switch gear controller is connected with microcontroller, and the signal input part of described microcontroller is connected with three-phase voltage Acquisition Circuit and three-phase current Acquisition Circuit.
Described microcontroller is connected with communication unit, sends distant signal to Surveillance center.
The relation that the present invention utilizes capacitor reactive power Q and voltage U is: Q=2 π fCU
2, by changing U, regulating idle output dynamic compensation, f is supply frequency, 50Hz, the capacitance that C is capacitor.Concrete principle is as described below:
7 voltage taps that arrange on three-phase high-voltage primary coil, every grade of 5%-8% that regulates rated voltage, 7 voltage taps are shifted out voltage to be connected on capacitor by outside electronic tap switch (or inner shunting switch (mechanical type)), and the capacity of capacitor is determined according to the capacity of distribution transformer and actual load.Microcontroller adopts nine district figure principles, utilize mains side electric current, voltage to make input signal, the inside calculating that breaks, and control thresholding is set, for example setup control thresholding is: power factor (0.9-0.95), when COS ∮ < 0.9, microcontroller sends boost signal to electronic tap switch gear controller, makes it change the gear of electronic tap switch, thereby make coil turn become many, automatic adjustment height output voltage, increases idle output, improves power factor; When COS ∮ > 0.95, microcontroller sends step-down signal to electronic tap switch gear controller, make it change the gear of electronic tap switch, thereby coil turn is tailed off, automatically turn down output voltage, reduce power factor, COS ∮ is remained between 0.9-0.95, to reduce line loss, reach the object of economizing on energy and electricity.Wherein electronic tap on-off controller is existing product, and it is also ripe principles well-known that microcontroller adopts Jiu district figure principle.
Claims (3)
1. an auto-reactive compensation Intelligent distribution transformer, comprise three-phase high-voltage primary coil and three-phase time low-voltage secondary coil, it is characterized in that: also include electronic tap switch, electronic tap switch gear controller and microcontroller, on described every phase primary of high voltage coil, be provided with one group of tap, totally three groups of taps, wherein first group of tap connects the first capacitor by the first shunting switch of electronic tap switch, second group of tap connects the second capacitor by the second shunting switch of electronic tap switch, the 3rd group of tap is by the 3rd shunting switch connection the 3rd capacitor of electronic tap switch, the first described capacitor, the other end of the second capacitor and the 3rd capacitor links together, described electronic tap switch is connected with electronic tap switch gear controller, and described electronic tap switch gear controller is connected with microcontroller, and the signal input part of described microcontroller is connected with three-phase voltage Acquisition Circuit and three-phase current Acquisition Circuit.
2. auto-reactive compensation Intelligent distribution transformer according to claim 1, is characterized in that: three groups of described taps have included 5-7 tap.
3. auto-reactive compensation Intelligent distribution transformer according to claim 2, is characterized in that: described microcontroller is connected with communication unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310639642.1A CN103701136A (en) | 2013-12-04 | 2013-12-04 | Automatic reactive compensation intelligent power distribution transformer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310639642.1A CN103701136A (en) | 2013-12-04 | 2013-12-04 | Automatic reactive compensation intelligent power distribution transformer |
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| CN103701136A true CN103701136A (en) | 2014-04-02 |
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| CN201310639642.1A Pending CN103701136A (en) | 2013-12-04 | 2013-12-04 | Automatic reactive compensation intelligent power distribution transformer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105811441A (en) * | 2016-05-19 | 2016-07-27 | 山东电工电气集团新能科技有限公司 | Three-phase unbalance and reactive power control device and method of interphase capacitor |
| CN108922759A (en) * | 2018-06-25 | 2018-11-30 | 河南森源电气股份有限公司 | A kind of high pressure automatic reactive compensation amorphous alloy distribution transformer |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3422343A (en) * | 1966-11-21 | 1969-01-14 | Westinghouse Electric Corp | Reactive power compensation by phase angle control and tap changer means |
| JPH1063359A (en) * | 1996-08-19 | 1998-03-06 | Matsushita Electric Ind Co Ltd | Reactive power adjusting device |
| CN2439745Y (en) * | 2000-05-31 | 2001-07-18 | 何平 | Stepped voltage regulating type high voltage dynamic reactive compensator |
| WO2007033599A1 (en) * | 2005-09-26 | 2007-03-29 | Ruitian Su | A customer intelligent reactive power automatic compensation energy-saved device |
| CN201536263U (en) * | 2009-07-08 | 2010-07-28 | 黄留欣 | Voltage-regulating SVC |
| CN103457270A (en) * | 2012-05-31 | 2013-12-18 | 黄留欣 | Central dynamic reactive compensation device for transformers |
| CN203632254U (en) * | 2013-12-04 | 2014-06-04 | 国家电网公司 | Automatic reactive compensation intelligent power distribution transformer |
-
2013
- 2013-12-04 CN CN201310639642.1A patent/CN103701136A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3422343A (en) * | 1966-11-21 | 1969-01-14 | Westinghouse Electric Corp | Reactive power compensation by phase angle control and tap changer means |
| JPH1063359A (en) * | 1996-08-19 | 1998-03-06 | Matsushita Electric Ind Co Ltd | Reactive power adjusting device |
| CN2439745Y (en) * | 2000-05-31 | 2001-07-18 | 何平 | Stepped voltage regulating type high voltage dynamic reactive compensator |
| WO2007033599A1 (en) * | 2005-09-26 | 2007-03-29 | Ruitian Su | A customer intelligent reactive power automatic compensation energy-saved device |
| CN201536263U (en) * | 2009-07-08 | 2010-07-28 | 黄留欣 | Voltage-regulating SVC |
| CN103457270A (en) * | 2012-05-31 | 2013-12-18 | 黄留欣 | Central dynamic reactive compensation device for transformers |
| CN203632254U (en) * | 2013-12-04 | 2014-06-04 | 国家电网公司 | Automatic reactive compensation intelligent power distribution transformer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105811441A (en) * | 2016-05-19 | 2016-07-27 | 山东电工电气集团新能科技有限公司 | Three-phase unbalance and reactive power control device and method of interphase capacitor |
| CN108922759A (en) * | 2018-06-25 | 2018-11-30 | 河南森源电气股份有限公司 | A kind of high pressure automatic reactive compensation amorphous alloy distribution transformer |
| CN108922759B (en) * | 2018-06-25 | 2023-10-20 | 河南森源电气股份有限公司 | High-voltage automatic reactive compensation amorphous alloy distribution transformer |
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Application publication date: 20140402 |