CN102360843B - Distribution transformer capable of automatically adjusting capacitance and voltage - Google Patents

Distribution transformer capable of automatically adjusting capacitance and voltage Download PDF

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Publication number
CN102360843B
CN102360843B CN 201110145290 CN201110145290A CN102360843B CN 102360843 B CN102360843 B CN 102360843B CN 201110145290 CN201110145290 CN 201110145290 CN 201110145290 A CN201110145290 A CN 201110145290A CN 102360843 B CN102360843 B CN 102360843B
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transformer
low
voltage
permanent
pressure
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CN102360843A (en
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魏贞祥
杨福荣
马振邦
潘新华
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BEIJING BRILE INTELLIGENT TECHNOLOGY GROUP CO., LTD.
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BEIJING BORUILAI INTELLIGENT TECHNOLOGY Co Ltd
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Abstract

The invention discloses a distribution transformer capable of automatically adjusting capacitance and voltage. The distribution transformer comprises a transformer shell; transformer coils are arranged in the shell; the upper and lower ends of the transformer coils are provided with an upper clamp piece and a lower clamp piece; the shell is provided with a transformer top cover; the upper part of the transformer top cover is provided with high voltage insulators and low voltage outlet parts or low voltage insulators; and the distribution transformer also comprises a transformer support, a capacitance adjustment switch, a voltage adjustment switch, a low voltage permanent magnet vacuum load switch and a comprehensive monitoring controller. The distribution transformer capable of automatically adjusting capacitance and voltage effectively solves the problems of low voltage in a distribution network, large no-load loss and unbalanced transformation three-phase load in a rural power distribution transformer district, can be operated remotely in a controllable way, has a function of power stealing prevention, and realizes automatic control and power monitoring and management of the power distribution network transformer district.

Description

Automatic capacity regulating voltage adjusting distribution transformer
Technical field
The present invention relates to rural electricity consumption distribution field, be specifically related to a kind of automatic capacity regulating voltage adjusting distribution transformer.
Background technology
The above time light running of Distribution Transformer in Rural Area 90%, no-load loss is large, ubiquity low-voltage and three-phase load energy imbalance, low-voltage can cause following harm: (1) burns motor.Brownout surpasses 10%, and motor current will be increased, the coil temperature even scaling loss motor that raises when serious.(2) lamp obfuscation.Lower voltage 5%, the illumination of common electric light descends 18%; Lower voltage 10%, illumination descends 35%; Lower voltage 20%, fluorescent lamp can not start.(3) increase line loss.When carrying certain electric power, lower voltage, the corresponding increase of electric current causes that line loss increases.(4) reduce the stability of electric power system.Due to lower voltage, corresponding reduction circuit delivery limits capacity, thereby reduced stability, the voltage collapse accident may occur in brownout.(5) generator output reduces.When if lower voltage surpasses 5%, generator output is also wanted corresponding reduction.(6) lower voltage, also can reduce give, the converting equipment ability.
Unsymmetrical current can increase circuit and transformer copper loss, in the situation that the limit, copper loss can increase by 3 times.For the transformer of Yyno connection group, also can increase the transformer iron loss, affect the transformer safe operation, cause imbalance of three-phase voltage, reduce power supply quality.
Solve the underloading problem, must adopt capacitance-adjustable transformer, enable pondage automatic according to payload; Solve the low-voltage problem, must adopt voltage regulating transformer, enable regulation voltage height automatic according to the voltage fluctuation situation, promote power supply quality; These transformer equipments can only solve one of them problem, and any equipment cost is all higher, in addition can't solve the three-phase load imbalance problem, obviously can not be at 10kV distribution network spread.
Summary of the invention
For the demand, the technical problem of solution of the present invention is, a kind of automatic capacity regulating voltage adjusting distribution transformer is provided, solved the ubiquitous low-voltage problem of power distribution network user, and solved the large and distribution transforming three-phase load imbalance problem of rural power distribution platform district no-load loss, long-range controllable operating be can also carry out, automation control and the power monitoring management of distribution net platform region realized.
The technical scheme of automatic capacity regulating voltage adjusting distribution transformer of the present invention is as follows:
automatic capacity regulating voltage adjusting distribution transformer of the present invention, comprise transformer shell, be provided with transformer coil in described housing, the upper and lower side of transformer coil is respectively arranged with upper clamping piece and lower clamping piece, be provided with head cover of transformer on described housing, described head cover of transformer top is provided with high voltage porcelain bushing and low-pressure line-outgoing place, wherein, also comprise transformer bracket, capacitance switch, tap changer, installation chassis, low-voltage vacuum permanent magnetism on-load switch, described transformer bracket is arranged on the transformer shell madial wall, described capacitance switch is fixed on described upper clamping piece by insulated support, described tap changer is fixed on described transformer bracket, described installation chassis is fixed on low-pressure line-outgoing place, head cover of transformer top, described low-voltage vacuum load permanent-magnetic switching is fixedly connected with described installation chassis.
Wherein, described low-pressure permanent magnetic vacuum load switch comprises casing, inner frame, low-voltage vacuum arc-extinguishing chamber, permanent-magnet electromagnetic operating means, described low-voltage vacuum arc-extinguishing chamber, permanent-magnet electromagnetic operating means are arranged on inner frame, are connected by transmission mechanism between described low-voltage vacuum arc-extinguishing chamber and electromagnet.
Wherein, described low-pressure permanent magnetic vacuum load switch also comprises the low-pressure permanent magnetic vacuum load switch casing, described low-pressure permanent magnetic vacuum load switch casing is positioned at described head cover of transformer top, and described low-pressure line-outgoing place and described low-pressure permanent magnetic vacuum load switch all are arranged in described low-pressure permanent magnetic vacuum load switch casing.
Wherein, described permanent-magnet electromagnetic operating means comprises fixing back-up ring and is positioned at the closing coil of described fixedly back-up ring, switching winding, static iron core, moving iron core and permanent magnet, described moving iron core is positioned at the middle part of described fixedly back-up ring, the two ends of described moving iron core are wound with respectively closing coil and switching winding, described static iron core is around moving iron core symmetric arrays, and described permanent magnet is positioned at the centre of the described switching winding of described moving core exterior surface and described closing coil.
Wherein, also comprise the comprehensive monitoring controller, described comprehensive monitoring controller and described capacity and pressure regulating switch and low-voltage vacuum load permanent-magnetic switching or high voltage permanent on-load switch are connected respectively, are used for controlling respectively the switching of described capacitance switch, tap changer and low-voltage vacuum load permanent-magnetic switching.
Wherein, also comprise low-voltage current mutual inductor, described low-voltage current mutual inductor be arranged in described low-pressure permanent magnetic vacuum load switch casing or the inboard low pressure insulator of head cover of transformer on.
Beneficial effect of the present invention is as follows.
The present invention has effectively solved the ubiquitous low-voltage problem of power distribution network user, and solved the large problem of rural power distribution platform district's no-load loss, coordinate with the low-voltage compensation power distribution equipment and also can realize distribution transforming three-phase load imbalance compensation problem, can also carry out long-range controllable operating, and has an anti-stealing electricity function, coordinate with High-voltage measuring box, can also realize the high pressure measurement load controlling function, realized automation control and the power monitoring management of distribution net platform region.It is a kind of novel transformer of intelligent economize on electricity, also the preferred plan that builds intelligent power distribution platform district, adopt this programme product improving power supply quality, extension device service life, improve circuit and distribution transforming conveying capacity, the various aspects such as increase amount of power supply all have significantly to be improved, existing huge economic benefit, significant social benefit is also arranged, suitable generally popularization.
Description of drawings
Fig. 1 represents the front view of band low-voltage load control automatic capacity regulating voltage adjusting distribution transformer of the present invention;
Fig. 2 represents the right view of band low-voltage load control automatic capacity regulating voltage adjusting distribution transformer of the present invention;
Fig. 3 represents the vertical view of band low-voltage load control automatic capacity regulating voltage adjusting distribution transformer of the present invention;
Fig. 4 represents the control principle drawing of automatic capacity regulating voltage adjusting distribution transformer of the present invention;
In figure, 1 low-pressure permanent magnetic vacuum load switch; 2 capacitance switchs; 3 transformer coils; 4 transformer shells; 5 high voltage porcelain bushings; 6 low-pressure line-outgoing places (low pressure insulator); 7 low-pressure permanent magnetic vacuum load switch casings; 8 emergency operation handles; 9 insulated supports; 11 head cover of transformers; 12 upper clamping pieces; 13 lower clamping pieces; 14 backing plates; 15 low-voltage current mutual inductors; 16 tap changers; 17 transformer brackets.
Embodiment
Below in conjunction with accompanying drawing, automatic capacity regulating voltage adjusting distribution transformer of the present invention is further illustrated.
Shown in accompanying drawing 1-3, comprise transformer shell 4 according to a kind of automatic capacity regulating voltage adjusting distribution transformer of the present invention, be provided with transformer coil 3 in described transformer shell 4, the upper and lower side of transformer coil 3 is respectively arranged with upper clamping piece 12 and lower clamping piece 13, is provided with backing plate 14 between transformer shell 4 and lower clamping piece 13.Be provided with head cover of transformer 11 on described transformer shell 4, described head cover of transformer 11 tops are provided with high voltage porcelain bushing 5 and low-pressure line-outgoing place 6 (being the low pressure insulator), be provided with transformer bracket 17 on described housing madial wall, wherein, also comprise capacitance switch 2, described capacitance switch 2 is fixed on described upper clamping piece 12 by insulated support 9, also comprises tap changer 16, and described tap changer 16 is fixed on above-mentioned transformer bracket 17.This automatic capacity regulating voltage adjusting distribution transformer also is provided with emergency operation handle 8, under powering-off state, and also can be by the manual capacity transfer of emergency operation handle 8.This automatic capacity regulating voltage adjusting distribution transformer also comprises low-voltage vacuum permanent magnetism on-load switch 1, and installation chassis is fixed on low-pressure line-outgoing 16 places, head cover of transformer top, and described low-voltage vacuum load permanent-magnetic switching 1 is fixedly connected with described installation chassis.Also comprise low-voltage vacuum permanent magnetism on-load switch casing 7, described low-voltage vacuum permanent magnetism on-load switch casing 7 is positioned at described head cover of transformer 11 tops, and described low-pressure line-outgoing place 6 all is arranged in described low-voltage vacuum permanent magnetism on-load switch casing 7 with described low-voltage vacuum permanent magnetism on-load switch 1.For realizing automatic control, also comprise the comprehensive monitoring controller, described comprehensive monitoring controller is connected respectively with described capacitance switch 2, tap changer 16 and low-pressure permanent magnetic vacuum load switch 1, is used for controlling respectively the switching of described capacitance switch 2, tap changer 16 and low-pressure permanent magnetic vacuum load switch 1.
In use procedure, be full of oil in existing transformer shell 4, tap changer 16, capacitance switch 2, transformer coil 3 all immerse in transformer oil; Be installed with 3 high voltage porcelain bushings 5,4 low-pressure line-outgoing places 6 on head cover of transformer 11,11 low-pressure line-outgoing places are equipped with 3 low-voltage current mutual inductors 15 at head cover of transformer, are through to be fixed in low-pressure permanent magnetic vacuum load switch casing 7 in low-pressure line-outgoing place 6 or head cover of transformer 11 inboards.
In use procedure, be full of oil in existing transformer shell 4, tap changer 16, capacitance switch 2, high voltage permanent on-load switch 18, transformer coil 3 all immerse in transformer oil, be installed with 3 high voltage porcelain bushings 5,4 low pressure insulators 6 on head cover of transformer 11, on the inboard low pressure insulator of head cover of transformer 11,3 low-voltage current mutual inductors 15 be installed.
the comprehensive monitoring controller is mainly by analog-to-digital conversion module, CPU module (CPU), Executive Module forms, the voltage and current signal that the current signal that low-voltage current mutual inductor 15 detects and low voltage voltage signal or High-voltage measuring box detect inputs to analog-to-digital conversion module, analog-to-digital conversion module inputs to CPU module (CPU) with the aanalogvoltage current signal, CPU module (CPU) calculates the also comprehensive virtual voltage current value of actual capacity value (P0) as criterion, corresponding output loop according to pre-conditioned triggering Executive Module, thereby control capacitance switch, tap changer, the switching of (height) low voltage permanent magnetic on-load switch:
With actual capacity P0 with preset transformer capacity value (Ph, Pl) and compare: if P0>Ph need turn capacity down, CPU signals to Executive Module and triggers the capacity transfer output loop; If P0<Pl need tune up capacity, CPU signals to Executive Module triggering capacity transfer output loop; If Pl<P0<Ph need not adjust capacity.
Actual voltage value (U0) and preset voltage value (UH, UL) are compared: if U0>UH needs voltage is turned down, CPU signals to trigger and turns down the pressure output loop; If U0<UL needs voltage is heightened, CPU signals to trigger and heightens the pressure output loop; If UL<U0<UH is without pressure regulation.
Equally, CPU module (CPU) compares computing with virtual voltage current value and preset voltage current protection value, and the instruction of sending out different to Executive Module triggers corresponding output loop.
The output loop of Executive Module is connected with capacitance switch, tap changer and low-voltage vacuum permanent magnetism on-load switch respectively, when corresponding output loop triggers, the conversion of on/off switch state is carried out in the corresponding switch motion that connects, and when converting, switch state signal feeds back to the comprehensive monitoring controller.The comprehensive monitoring controller carries remote communicating function, thereby realizes Long-distance Control and power information monitoring management.
The comprehensive monitoring controller is arranged in the control casing of transformer outside, is generally the low-voltage compensation distribution box that matches with it.In actual applications, this casing can be fixedly mounted on below the transformer stand, also can be fixedly mounted on the electric pole adjacent with the transformer outgoing line side.
The above is only the preferred embodiment of the present invention; should be pointed out that for the person of ordinary skill of the art, under the prerequisite that does not break away from the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (6)

1. automatic capacity regulating voltage adjusting distribution transformer, comprise transformer shell, be provided with transformer coil in described housing, the upper and lower side of transformer coil is respectively arranged with upper clamping piece and lower clamping piece, be provided with head cover of transformer on described housing, described head cover of transformer top is provided with high voltage porcelain bushing and low-pressure line-outgoing place, it is characterized in that, also comprise transformer bracket, capacitance switch, tap changer, installation chassis, low-pressure permanent magnetic vacuum load switch, described transformer bracket is arranged on the transformer shell madial wall, described capacitance switch is fixed on described upper clamping piece by insulated support, described tap changer is fixed on described transformer bracket, described installation chassis is fixed on low-pressure line-outgoing place, head cover of transformer top, described low-pressure permanent magnetic vacuum load switch is fixedly connected with described installation chassis.
2. automatic capacity regulating voltage adjusting distribution transformer according to claim 1, it is characterized in that, described low-pressure permanent magnetic vacuum load switch comprises casing, inner frame, low-voltage vacuum arc-extinguishing chamber, permanent-magnet electromagnetic operating means, described low-voltage vacuum arc-extinguishing chamber, permanent-magnet electromagnetic operating means are arranged on inner frame, are connected by transmission mechanism between described low-voltage vacuum arc-extinguishing chamber and permanent-magnet electromagnetic operating means.
3. automatic capacity regulating voltage adjusting distribution transformer according to claim 2, is characterized in that, described casing is positioned at described head cover of transformer top, and described low-pressure line-outgoing place and described inner frame all are arranged in described casing.
4. automatic capacity regulating voltage adjusting distribution transformer according to claim 3, it is characterized in that, described permanent-magnet electromagnetic operating means comprises fixing back-up ring and is positioned at the closing coil of described fixedly back-up ring, switching winding, static iron core, moving iron core and permanent magnet, described moving iron core is positioned at the middle part of described fixedly back-up ring, the two ends of described moving iron core are wound with respectively closing coil and switching winding, described static iron core is around moving iron core symmetric arrays, and described permanent magnet is positioned at the centre of the described switching winding of described moving core exterior surface and described closing coil.
5. according to claim 1-4 described automatic capacity regulating voltage adjusting distribution transformers of any one, it is characterized in that, also comprise the comprehensive monitoring controller, described comprehensive monitoring controller is connected respectively with described capacity and pressure regulating switch and low-pressure permanent magnetic vacuum load switch, is used for controlling respectively the switching of described capacitance switch, tap changer and low-pressure permanent magnetic vacuum load switch.
6. automatic capacity regulating voltage adjusting distribution transformer according to claim 5, is characterized in that, also comprises low-voltage current mutual inductor, described low-voltage current mutual inductor be arranged in described casing or head cover of transformer inboard.
CN 201110145290 2011-05-31 2011-05-31 Distribution transformer capable of automatically adjusting capacitance and voltage Active CN102360843B (en)

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Application Number Priority Date Filing Date Title
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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102651273B (en) * 2012-04-09 2015-04-01 中国电力科学研究院 Arcless on-load volume regulation and voltage regulation distribution transformer
CN103219137B (en) * 2013-03-26 2016-08-03 国家电网公司 A kind of self adaptation load type distribution transformer
CN103680884B (en) * 2013-12-28 2015-12-02 河北森蔚电气科技有限公司 10kv intelligent energy balance distribution transformer

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2109622U (en) * 1991-11-06 1992-07-08 山东省茌平县轻工机械厂 On-load automatic capacity adjusting transformer
CN101090034A (en) * 2007-05-14 2007-12-19 邵长青 Load capacity and pressure regulating switch for transformer
CN201839009U (en) * 2010-10-27 2011-05-18 陕西合容电气电容器有限公司 Reactive dynamic voltage compensator
CN202084408U (en) * 2011-05-31 2011-12-21 北京博瑞莱智能科技有限公司 Distribution transformer capable of automatically regulating capacitance and voltage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2109622U (en) * 1991-11-06 1992-07-08 山东省茌平县轻工机械厂 On-load automatic capacity adjusting transformer
CN101090034A (en) * 2007-05-14 2007-12-19 邵长青 Load capacity and pressure regulating switch for transformer
CN201839009U (en) * 2010-10-27 2011-05-18 陕西合容电气电容器有限公司 Reactive dynamic voltage compensator
CN202084408U (en) * 2011-05-31 2011-12-21 北京博瑞莱智能科技有限公司 Distribution transformer capable of automatically regulating capacitance and voltage

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