CN201629502U - Reactive compensation comprehensive box for low voltage distribution transformer - Google Patents
Reactive compensation comprehensive box for low voltage distribution transformer Download PDFInfo
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- CN201629502U CN201629502U CN2009202702925U CN200920270292U CN201629502U CN 201629502 U CN201629502 U CN 201629502U CN 2009202702925 U CN2009202702925 U CN 2009202702925U CN 200920270292 U CN200920270292 U CN 200920270292U CN 201629502 U CN201629502 U CN 201629502U
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Abstract
The utility model discloses a reactive compensation comprehensive box for a low voltage distribution transformer, which comprises a box body, wherein the box body comprises a switch chamber and a capacitance chamber that are arranged side by side; the switch chamber is internally provided with a metering and sampling current transformer, a knife melt switch, a compensation sampling current transformer and a creepage comprehensive protection switch device; and the capacitance chamber is internally provided with a capacitance compensation device and a metering terminal. The reactive compensation comprehensive box also comprises a switching automatic control unit which is respectively connected with the metering and sampling current transformer, the compensation sampling current transformer and the capacitance compensation device. The reactive compensation comprehensive box integrates the functions of overload, short-circuit, creepage, phase loss, faulted neutral line protection, reactive compensation metering, low voltage isolation, electric meters, load measuring and recording instruments and the like, effectively solves a series of problems encountered when a plurality of devices with single function are installed at a low voltage side of a rack-type distribution transformer, and has the advantages of improving the safety and reliability of the low voltage side of the rack-type distribution transformer, and reducing the comprehensive cost.
Description
Technical field
The utility model relates to a kind of intelligent grid reactive power compensation integrated box of low-voltage distribution transformer.
Background technology
There is following shortcoming in the present domestic distributed board outdoor that is applicable to the public change low-pressure side in town and country: the one, and function singleness is only as using, do not have the effect that improves power factor (PF), raising quality of voltage, reduces line loss in the circuit lattice; The 2nd, the failure rate height, traditional cutter melts isolating switch, can not the on-load separating brake, can only bring into play branch under the zero load situation, close function and reliability is not high; The 3rd, operation inconvenience, the back door of equipment need be opened and associative operation can be carried out, end along with the city net and the upgrading of rural power grids, along with combining the telemechanical of transformer station is operated requirement from the extensive use of changing transformer station and centralized control center's far-end, press for existing distribution box is improved, design a kind of powerful, reliability is high and automaticity is higher intelligent grid type distribution transforming reactive comprehensive case.
The utility model content
In view of this; the utility model provides a kind of reactive power compensation integrated box of low-voltage distribution transformer; can replace the low pressure disconnecting link to be installed between step down side and the low voltage electric network; the short circuit of low voltage electric network and the protective device of overload both can have been made; can stand in underground input and the cut-out operation that realizes low voltage electric network by operation its " branch ", " closing " again; also have no-power compensation function simultaneously, its stable performance, safe and reliable.
The purpose of this utility model provides a kind of reactive power compensation integrated box of low-voltage distribution transformer, comprises casing, and described casing comprises switch gear room and the electric capacity chamber that is arranged side by side;
Metering sampled current transformer, switch with knifeshaped fuse, compensation sampled current transformer and electric leakage integrated protection switch are set in the described switch gear room, one end of described switch with knifeshaped fuse is electrically connected with the external transformer low voltage terminal by the metering sampled current transformer, and the other end of described switch with knifeshaped fuse is electrically connected with the electric leakage protection switch by the compensation sampled current transformer;
Described electric capacity chamber interior is provided with Electric capacity compensation device and measuring terminal, and described Electric capacity compensation device inserts between compensation sampled current transformer and the electric leakage integrated protection switch, and described measuring terminal is connected with the output of metering sampled current transformer;
Described reactive power compensation integrated box of low-voltage distribution transformer also comprises the switching automatic control unit, and described switching automatic control unit is connected with Electric capacity compensation device with metering sampled current transformer, compensation sampled current transformer respectively.
Further, described switching automatic control unit comprises microprocessor unit, described metering sampled current transformer is connected with the input pin of microprocessor unit respectively with the compensation sampled current transformer, and the output pin of described microprocessor unit is connected with Electric capacity compensation device;
Further, described Electric capacity compensation device comprises self-healing low-voltage power capacitor, the miniature circuit breaker and the A.C. contactor that are connected with the self-healing low-voltage power capacitor;
Further, described Electric capacity compensation device adopts three-phase to mend altogether and phase splitting compensation mixed networking mode;
Further, described self-healing low-voltage power capacitor is built-in with temperature sensor, and described temperature sensor is electrically connected with the input pin of microprocessor;
Further, the side of described electric capacity chamber is provided with display unit, described display unit be electrically connected with microprocessor;
Further, the outer surface of described switch gear room is provided with the handle hole that is used for the operating axis of switch with knifeshaped fuse is carried out peripheral operation;
Further, described switching automatic control unit also comprises communication module, and described communication module is used to realize the cascade communication between many reactive power compensation integrated box of low-voltage distribution transformer;
Further, described metering sampled current transformer, switch with knifeshaped fuse, compensation sampled current transformer and electric leakage integrated protection switch are arranged installation according to the principle of top inlet wire, bottom outlet in the switch gear room.
Further, the side design of opening the door is adopted in described electric capacity chamber.
The beneficial effects of the utility model are:
1. the utility model has overcome the shortcoming of existing common distribution box, except replacing the low pressure disconnecting link to be installed between step down side and the low voltage electric network, as the short circuit of low voltage electric network and the protective device of overload, the staff also can be by operation its " branch ", " close " input that realizes low voltage electric network and cut off operation, staff's various workloads have been reduced, avoid stopping the transformer high-voltage side because of low voltage failure, adopted the electric leakage integrated protection switch simultaneously, this device collection overload short circuit, phase shortage is under-voltage, residual current (electric leakage), protection such as the disconnected zero line of power end and automatic reclosing are in one, can greatly protect operating personnel's personal safety, strengthen the fail safe and the stability of whole system;
2. the utility model has merged no-power compensation function simultaneously, fully absorb three-phase and mended the technical characterstic that divides benefit with three-phase altogether, on the basis that traditional three-phase is mended altogether, can also realize independent detection and compensation to three-phase alternating current, avoid three-phase to mend " empty compensation " situation of existence altogether, improved the power factor (PF) of every cross streams electricity;
3. the utlity model has dependable performance, lower, the tangible advantage of energy-saving effect of cost, can adapt to the use of various workplaces such as low-voltage distribution zone, electric substation, modularization reactive power compensator and leakage switch load instrument for measuring and recording and ammeter are put together, reduced distribution box quantity on the bar, the technological transformation of low voltage electric network, reduce that line loss, increase capacity are increased work efficiency etc. is had obvious effect, have a good application prospect;
4. the side design of opening the door is adopted in electric capacity of the present utility model chamber, and convenient maintenance and change device also helps the preventing dust of equipment, waterproof simultaneously.
Other advantages of the present utility model, target, to set forth in the following description to a certain extent with feature, and to a certain extent, based on being conspicuous to those skilled in the art, perhaps can from practice of the present utility model, obtain instruction to investigating hereinafter.Target of the present utility model and other advantages can realize and obtain by following specification and claims.
Description of drawings
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing the utility model is described in further detail, wherein:
Fig. 1 is an external structure schematic diagram of the present utility model;
Fig. 2 is an internal structure schematic diagram of the present utility model;
Fig. 3 is a vertical view of the present utility model;
Fig. 4 is an equipment connection diagram of the present utility model;
Fig. 5 is a control connection schematic diagram of the present utility model;
Fig. 6 adopts the separate unit connection diagram of three-phase switching mode for the utility model;
Fig. 7 adopts many connection diagrams of three-phase switching mode for the utility model.
Embodiment
Hereinafter with reference to accompanying drawing, preferred embodiment of the present utility model is described in detail.Should be appreciated that preferred embodiment only for the utility model is described, rather than in order to limit protection range of the present utility model.
As shown in Figures 1 to 4, reactive power compensation integrated box of low-voltage distribution transformer of the present utility model comprises casing, and casing comprises switch gear room 1 and the electric capacity chamber 2 that is arranged side by side;
Be provided with metering sampled current transformer 11, switch with knifeshaped fuse 12, compensation sampled current transformer 13 and electric leakage integrated protection switch 14 in the switch gear room 1, one end of switch with knifeshaped fuse 12 is electrically connected with the external transformer low voltage terminal by metering sampled current transformer 11, the other end of switch with knifeshaped fuse 12 is electrically connected with electric leakage integrated protection switch 14 by compensation sampled current transformer 13, exports each to by electric leakage integrated protection switch 14 and uses electric loading; Wherein, metering sampled current transformer 11, switch with knifeshaped fuse 12, compensation sampled current transformer 13 and electric leakage integrated protection switch 14 are arranged installation according to top inlet wire, bottom outlet in switch gear room 1, the outer surface of switch gear room 1 is provided with the handle hole that is used for the operating axis of switch with knifeshaped fuse is carried out peripheral operation.
Protection and automatic reclosings such as electric leakage integrated protection switch 14 integrates the overload short circuit, phase shortage is under-voltage, residual current (electric leakage), the disconnected zero line of power end; adopt microprocessor intelligence digital programmable control circuit; all functions are finished by modularized program; remaining current value in the time of can showing real-time residual electricity flow valuve, fault leakage tripping phase sequence automatically and show tripping operation; and can follow the tracks of the circuit residual current automatically; automatically increase or reduce the operating value gear; have manual and automatic divide-shut brake function, can freely change.The application of this device can greatly be protected operating personnel's personal safety, has strengthened the fail safe and the stability of whole system.
2 inside, electric capacity chamber are provided with Electric capacity compensation device 21 and measuring terminal 22, the input of Electric capacity compensation device 21 is connected between compensation sampled current transformer 13 and the electric leakage integrated protection switch 14, and the input of measuring terminal 22 is connected with the output of metering sampled current transformer 11; Electric capacity compensation device 21 comprises self-healing low-voltage power capacitor 211, the miniature circuit breaker and the A.C. contactor that are connected with self-healing low-voltage power capacitor 211.The side design of opening the door is adopted in electric capacity of the present utility model chamber, and convenient maintenance and change device also helps the preventing dust of equipment, waterproof simultaneously.
As shown in Figure 5, reactive power compensation integrated box of low-voltage distribution transformer also comprises the switching automatic control unit, the switching automatic control unit comprises microprocessor unit 3, the input pin of microprocessor unit 3 is connected with the voltage transformer 5 that measures sampled current transformer 11, compensation sampled current transformer 13 and be arranged on the outside inlet highway respectively, and the output pin of microprocessor unit 3 is connected with Electric capacity compensation device 21.
Be built-in with temperature sensor 6 at the self-healing low-voltage power capacitor, temperature sensor 6 is electrically connected with the input pin of microprocessor 3.
The utility model in use, the voltage on the three-phase inlet wire bus is gathered by voltage transformer 5; The electric current that flows through power line is input to microprocessor 3 by the collection of external impressed current instrument transformer by binding post; Temperature sensor 6 is used for gathering the temperature of capacitor.The various data of gathering with accurate phase angle control mode, realize operating passing zero by the quick calculating of little process chip automatically.
In addition, Electric capacity compensation device adopts three-phase to mend altogether and phase splitting compensation mixed networking mode.Three-phase is mended and the common networking of phase splitting compensation altogether, effectively control system three-phase equilibrium, and improve system balance efficient greatly, the accuracy-control system power factor avoids system to occur mending, owe mending and the three-phase imbalance problem.
The side of electric capacity chamber 2 is provided with display unit, display unit be electrically connected with microprocessor.Present embodiment can also dispose input keyboard, can realize the man-machine communication on the spot.
The switching automatic control unit also comprises communication module, and communication module is used to realize the cascade communication between many reactive power compensation integrated box of low-voltage distribution transformer and be incorporated into the power networks.
As Fig. 6, shown in Figure 7, the utility model both can be used separately, also can merge use, by communication module (adopting the RS485 interface mode in the present embodiment), can insert background computer, carry out electrical power distribution integrated management, when many capacitor networkings, adopt the cascade system of electrical isolation and the RS485 communication modes that photoelectricity is isolated, a plurality of capacitors formed a Star Network with master-slave mode, wherein capacitor controller be main frame other be slave.
The utility model also has the function of dynamic compensation, and main frame is according to the direct switching state of each slave of control such as power factor, and the line item of going forward side by side carries out automatic switching by desired volume, constitutes the low-voltage reactive power automatic control system; If indivedual slave faults withdraw from automatically, do not influence all the other work; If hostdown withdraws from automatically, in all the other slaves, produce a new main frame, form a new system, wherein, the capacitor that capacity is identical is pressed the switching cycle principle, and the different capacitor of capacity is mended the principle switching by fitting.
In a word, above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from the aim and the scope of the technical program, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (10)
1. reactive power compensation integrated box of low-voltage distribution transformer comprises casing, it is characterized in that: described casing comprises switch gear room and the electric capacity chamber that is arranged side by side;
Metering sampled current transformer, switch with knifeshaped fuse, compensation sampled current transformer and electric leakage integrated protection switch are set in the described switch gear room, one end of described switch with knifeshaped fuse is electrically connected with the external transformer low voltage terminal by the metering sampled current transformer, and the other end of described switch with knifeshaped fuse is electrically connected with the electric leakage protection switch by the compensation sampled current transformer;
Described electric capacity chamber interior is provided with Electric capacity compensation device and measuring terminal, and described Electric capacity compensation device inserts between compensation sampled current transformer and the electric leakage integrated protection switch, and described measuring terminal is connected with the output of metering sampled current transformer;
Described reactive power compensation integrated box of low-voltage distribution transformer also comprises the switching automatic control unit, and described switching automatic control unit is connected with Electric capacity compensation device with metering sampled current transformer, compensation sampled current transformer respectively.
2. reactive power compensation integrated box of low-voltage distribution transformer as claimed in claim 1, it is characterized in that: described switching automatic control unit comprises microprocessor unit, described metering sampled current transformer is connected with the input pin of microprocessor unit respectively with the compensation sampled current transformer, and the output pin of described microprocessor unit is connected with Electric capacity compensation device.
3. reactive power compensation integrated box of low-voltage distribution transformer as claimed in claim 2 is characterized in that: described Electric capacity compensation device comprises self-healing low-voltage power capacitor, the miniature circuit breaker and the A.C. contactor that are connected and connect with the self-healing low-voltage power capacitor.
4. reactive power compensation integrated box of low-voltage distribution transformer as claimed in claim 3 is characterized in that: described Electric capacity compensation device adopts three-phase to mend altogether and phase splitting compensation mixed networking mode.
5. reactive power compensation integrated box of low-voltage distribution transformer as claimed in claim 4 is characterized in that: described self-healing low-voltage power capacitor is built-in with temperature sensor, and described temperature sensor is electrically connected with the input pin of microprocessor.
6. reactive power compensation integrated box of low-voltage distribution transformer as claimed in claim 5 is characterized in that: the side of described electric capacity chamber is provided with display unit, and described display unit is electrically connected with microprocessor unit.
7. reactive power compensation integrated box of low-voltage distribution transformer as claimed in claim 6 is characterized in that: the outer surface of described switch gear room is provided with the handle hole that is used for the operating axis of switch with knifeshaped fuse is carried out peripheral operation.
8. reactive power compensation integrated box of low-voltage distribution transformer as claimed in claim 7 is characterized in that: described switching automatic control unit also comprises the communication module that is used to realize cascade communication between many reactive power compensation integrated box of low-voltage distribution transformer.
9. as described reactive power compensation integrated box of low-voltage distribution transformer as described in the arbitrary claim of claim 1 to 8, it is characterized in that: described metering sampled current transformer, switch with knifeshaped fuse, compensation sampled current transformer and electric leakage integrated protection switch are arranged installation according to the principle of top inlet wire, bottom outlet in the switch gear room.
10. as described reactive power compensation integrated box of low-voltage distribution transformer as described in the claim 9, it is characterized in that: the side design of opening the door is adopted in described electric capacity chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202702925U CN201629502U (en) | 2009-11-27 | 2009-11-27 | Reactive compensation comprehensive box for low voltage distribution transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202702925U CN201629502U (en) | 2009-11-27 | 2009-11-27 | Reactive compensation comprehensive box for low voltage distribution transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201629502U true CN201629502U (en) | 2010-11-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202702925U Expired - Fee Related CN201629502U (en) | 2009-11-27 | 2009-11-27 | Reactive compensation comprehensive box for low voltage distribution transformer |
Country Status (1)
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| CN (1) | CN201629502U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636731A (en) * | 2012-04-12 | 2012-08-15 | 上海交通大学 | Power distribution network single-phase disconnection judging and addressing method based on load measuring and recording system |
| CN102882216A (en) * | 2012-09-25 | 2013-01-16 | 象山县供电局 | Low-voltage no-power automatic control method |
| CN103812121A (en) * | 2014-03-04 | 2014-05-21 | 北京富机达能电气产品股份有限公司 | High voltage intelligence compensation device |
| CN104242075A (en) * | 2013-06-20 | 2014-12-24 | 国家电网公司 | Multifunctional compensation box |
| CN104578100A (en) * | 2014-12-25 | 2015-04-29 | 贵州天能电力高科技有限公司 | Reactive power compensation cabinet provided with two side-open doors |
| CN105552925A (en) * | 2015-12-30 | 2016-05-04 | 国网浙江余姚市供电公司 | Novel graded reactive power compensation device |
| CN107769224A (en) * | 2017-11-28 | 2018-03-06 | 南京科沃电力科技有限公司 | A kind of Low-voltage Line Loss intelligent compensation terminal |
-
2009
- 2009-11-27 CN CN2009202702925U patent/CN201629502U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636731A (en) * | 2012-04-12 | 2012-08-15 | 上海交通大学 | Power distribution network single-phase disconnection judging and addressing method based on load measuring and recording system |
| CN102636731B (en) * | 2012-04-12 | 2015-05-20 | 上海交通大学 | Power distribution network single-phase disconnection judging and addressing method based on load measuring and recording system |
| CN102882216A (en) * | 2012-09-25 | 2013-01-16 | 象山县供电局 | Low-voltage no-power automatic control method |
| CN102882216B (en) * | 2012-09-25 | 2014-11-19 | 象山县供电局 | Low-voltage no-power automatic control method |
| CN104242075A (en) * | 2013-06-20 | 2014-12-24 | 国家电网公司 | Multifunctional compensation box |
| CN103812121A (en) * | 2014-03-04 | 2014-05-21 | 北京富机达能电气产品股份有限公司 | High voltage intelligence compensation device |
| CN103812121B (en) * | 2014-03-04 | 2016-02-03 | 北京富机达能电气产品股份有限公司 | A kind of high-voltage intelligent compensation arrangement |
| CN104578100A (en) * | 2014-12-25 | 2015-04-29 | 贵州天能电力高科技有限公司 | Reactive power compensation cabinet provided with two side-open doors |
| CN105552925A (en) * | 2015-12-30 | 2016-05-04 | 国网浙江余姚市供电公司 | Novel graded reactive power compensation device |
| CN107769224A (en) * | 2017-11-28 | 2018-03-06 | 南京科沃电力科技有限公司 | A kind of Low-voltage Line Loss intelligent compensation terminal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101110 Termination date: 20101127 |