CN200947547Y - Reactive compensating device for low voltage distribution system - Google Patents
Reactive compensating device for low voltage distribution system Download PDFInfo
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- CN200947547Y CN200947547Y CNU2006201386325U CN200620138632U CN200947547Y CN 200947547 Y CN200947547 Y CN 200947547Y CN U2006201386325 U CNU2006201386325 U CN U2006201386325U CN 200620138632 U CN200620138632 U CN 200620138632U CN 200947547 Y CN200947547 Y CN 200947547Y
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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 utility model discloses a piece of low-voltage 400V power distribution system var automatic compensation equipment, which is characterized in regulating the capacitor voltage to change the var power output so as to satisfy the demand of automatic var power output and wastage reduction. The device is composed of an automatic coupling voltage regulator or a distribution transformer with a voltage regulation tap, a microcomputer controller, a control switch and a capacitor. The microcomputer controller, according to the current, voltage and pre-set power factor, analyzes and judges to order the relevant switch to close. As a result, the output capacity of the capacitor can meet the demand of system requirements, and therefore realizing the most perfect power factor and least wastage. And the utility model is suitable for the 400V power distribution system var automatic compensation.
Description
Technical field
The utility model belongs to a kind of electric network reactive-load adjusting device, and concrete is the reactive-load adjusting device of low voltage electric network, is a kind ofly to regulate idle low-voltage reactive power adjusting device by the regulating capacitor terminal voltage automatically.
Background technology
Energy-conservation is to guarantee sustained economic development, the major issue that brings benefit to the next generation, benefits the nation and the people.Electric energy is the important form of industrial or agricultural, resident living consumes energy because cleanliness without any pollution is convenient to remote conveying again.In the electric power course of conveying, because reactive power compensation is unreasonable, or can not timely compensation idle, increased the line loss during electric power is carried.According to the material of announcing, China Power system line loss in 2004 is up to 5.9%, and low-voltage distribution network system line loss accounts for more than 40% of electric power system line loss.The above user power factor of China regulation 100KVA is not less than 0.90.But no matter be that power supply enterprise's distribution network systems or user can reach the few of this requirement, cause power distribution network circuit line loss higher, line loss rate reaches more than 10%, and by poor management, the individual wire loss rate is up to 18%～20%.Reduce line loss except that improving network configuration, the important techniques means are to strengthen reactive management, accomplish the in good time on the spot reactive balance of layering and zoning, can effectively reduce line loss, reduce the electric energy consume.The way one of present domestic voltage and reactive power compensation, particularly low-pressure reactive compensation is the installing fixed capacitor, the 2nd, and installing low pressure VQC is an automatic switching capacitor group.But low pressure VQC damages owing to fling-cut switch and overvoltage causes capacitor to damage easily, and operation ratio is low, the failure rate height, and the life-span is short, and electric power system low pressure VQC devoting rate is less than 50%, and the life-span is generally in 3～5 years.Therefore, need to analyze the problem that low-voltage reactive compensator capable exists, development can be carried out the device of pressure-adjusting type low-pressure reactive compensation automatically, solves the problem of existence such as VQC, effectively improves compensation effect, reduces the power distribution network line loss.
The utility model content
The purpose of this utility model is at the problems referred to above, a kind of low-voltage distribution system reactive power automatic compensation device is proposed, this device is provided with microcomputerized controller, the voltage and current instrument transformer, the reactive power compensation capacitor fixing inserts match system, is provided with four tap changers, switches the voltage regulating transformer terminals by electrical micro-machine controller control switch, the regulating capacitor terminal voltage is regulated the idle output of distribution system automatically.Have simple in structure, low cost of manufacture, the advantage that idle regulating effect is good.
The purpose of this utility model is achieved through the following technical solutions: a kind of low-voltage distribution system reactive power automatic compensation device, mainly comprise: regulator, capacitor, microcomputerized controller, voltage transformer, current transformer, it is characterized in that: regulator is to be provided with 400V, 360V, 320V, the transformer of four voltage output ends of 280V, these four voltage output ends are respectively by four K switch 1, K2, K3, K4 is connected with the end of described capacitor C, but the other end of this capacitor is connected with the zero line of voltage regulating transformer, the voltage transformer summation current transformer is connected with the low pressure three-phase bus of distribution transformer, the voltage signal Ua of this voltage transformer, Ub, Uc, the current signal Ia of U0 summation current transformer, Ib, Ic is connected with the input of microcomputerized controller respectively, the output of this microcomputerized controller and K switch 1, K2, K3, the K4 control connection is by the folding of these four switches of solenoid control; Described microcomputerized controller is provided with computer program, and this program can be carried out computing according to predefined power factor and voltage, current signal, and the described switch folding of output control, regulates the control signal of required capacitor terminal voltage.
The additional project of further improving and implementing of the present utility model is:
Described 400V, 360V, four voltage output ends of 320V, 280V are arranged on the secondary coil of voltage regulator TB2, and the primary coil of this voltage regulator is connected with the low-voltage bus bar of distribution transformer TB1.
The secondary coil that described 400V, 360V, four voltage output ends of 320V, 280V are arranged on the distribution transformer TB3 that has voltage regulation coil is on the low-voltage bus bar.
Described microcomputerized controller is provided with the far-end input/output interface, can realize the signal transmission of far-end, carries out the control of described tap changer and control result's remote monitoring.
The utility model guarantees being connected of capacitor and low-voltage bus bar, guarantees that the idle output reliable action of capacitor is in low pressure 400V bus; According to the distribution transformer operational factor is voltage, electric current and reactive factor automatic analysis and judgment such as (U, I, cos φ), according to setup parameter, timely adjustment capacitor terminal voltage is regulated its idle output automatically, guarantee that cos φ is in setting range, simultaneously also can realize regulating automatically, change idle output capacity, improve power factor by idle or time, reduce transmission current, reduce the heating loss, effectively reduce line loss, reach the purpose that reduces the transmission of electricity energy consumption.Because adopted four pressure adjusting structures that retaining is inferior, output voltage is 400V, 360V, 320V, 280V, realization capacitor output capacity is regulated in (100%～81%～64%～49%) * capacitor rated capacity scope.Simple in structure, cost of manufacture is low, because computer control device is set, can realize the control operation automation, move simple and conveniently, and can realize far-end control, therefore, the utlity model has simple in structure with, cost is low, controls convenient, flexiblely, controls effective and stable advantage.
Description of drawings
Fig. 1 is structural representation of the present utility model (embodiment 1 structural representation);
Fig. 2 is the structural representation of embodiment 2.
Embodiment
Below in conjunction with drawings and Examples the utility model is described further: embodiment 1: with reference to accompanying drawing, a kind of low-voltage distribution system reactive power automatic compensation device, mainly comprise: regulator, capacitor, microcomputerized controller, voltage transformer, current transformer, regulator is to be provided with 400V, 360V, 320V, the transformer of four voltage output ends 1 of 280V, these four voltage output ends are respectively by four K switch 1, K2, K3, K4 is connected with the end of described capacitor C, the transformer a phase of only drawing among Fig. 1 tap is connected with four switches, its b, the syndeton of c phase is mutually identical with a, but the other end of described capacitor C is connected with the zero line of voltage regulating transformer, the low pressure three-phase bus a of voltage transformer 5 summation current transformers 6 and distribution transformer, b, c connects, the voltage signal U1 of this voltage transformer, U2, the current signal I1 of U3 summation current transformer, I2, I3 is connected with the input of microcomputerized controller 4 respectively, the output of this microcomputerized controller and K switch 1, K2, K3, the K4 control connection is by the folding of these four switches of solenoid control; Described microcomputerized controller is provided with computer program, and this program can be carried out computing according to predefined power factor and voltage, current signal, and the described switch folding of output control, regulates the control signal of required capacitor terminal voltage.400V described in the present embodiment, 360V, four outputs 1 of 320V, 280V are arranged on the secondary coil of voltage regulator TB2, this voltage regulator be a kind of can be used for the idle output of regulating capacitor from the lotus root voltage regulator, 100%, 90%, 80%, 70% place of level coil is provided with four taps secondarily, four tap output voltages are 400V, 360V, 320V, 280V, realization capacitor output capacity is regulated in (100%～81%～64%～49%) * capacitor rated capacity scope, realizes the adjusting to idle output.The microcomputerized controller of present embodiment is provided with 232 and 485 interfaces, can realize Long-distance Control.
Embodiment 2: the automatic reactive-load adjusting device of a kind of low-voltage distribution system, and described 400V, 360V, four outputs of 320V, 280V are arranged on the secondary coil of the distribution transformer TB3 that has voltage regulation coil, and other structures are identical with embodiment 1, repeat no more.
Claims (4)
1, a kind of low-voltage distribution system reactive power automatic compensation device, mainly comprise: regulator, capacitor, microcomputerized controller, voltage transformer, current transformer, it is characterized in that: regulator is to be provided with 400V, 360V, 320V, the transformer of four voltage output ends of 280V (1), these four voltage output ends are respectively by four K switch 1, K2, K3, K4 is connected with the end of described capacitor C, but the other end of this capacitor is connected with the zero line of voltage regulating transformer, the low pressure three-phase bus a of voltage transformer (2) summation current transformer (3) and distribution transformer, b, c connects, the voltage signal Ua of this voltage transformer, Ub, Uc, the current signal Ia of U0 summation current transformer, Ib, Ic is connected with the input of microcomputerized controller (4) respectively, the output of this microcomputerized controller and K switch 1, K2, K3, the K4 control connection is by the folding of these four switches of solenoid control; Described microcomputerized controller is provided with computer program, and this program can be carried out computing according to predefined power factor and voltage, current signal, and the described switch folding of output control, regulates the control signal of required capacitor terminal voltage.
2, low-voltage distribution system reactive power automatic compensation device according to claim 1, it is characterized in that: described 400V, 360V, four voltage output ends of 320V, 280V are arranged on the secondary coil of voltage regulator TB2, and the primary coil of this voltage regulator is connected with the low-voltage bus bar of distribution transformer TB1.
3, low-voltage distribution system reactive power automatic compensation device according to claim 1 is characterized in that: the secondary coil that described 400V, 360V, four voltage output ends of 320V, 280V are arranged on the distribution transformer TB3 that has voltage regulation coil is on the low-voltage bus bar.
4, low-voltage distribution system reactive power automatic compensation device according to claim 1, it is characterized in that: described microcomputerized controller is provided with far-end input/output interface (5,6), the signal transmission of far-end be can realize, the control of described tap changer and control result's remote monitoring carried out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201386325U CN200947547Y (en) | 2006-09-18 | 2006-09-18 | Reactive compensating device for low voltage distribution system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201386325U CN200947547Y (en) | 2006-09-18 | 2006-09-18 | Reactive compensating device for low voltage distribution system |
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| CN200947547Y true CN200947547Y (en) | 2007-09-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2006201386325U Expired - Fee Related CN200947547Y (en) | 2006-09-18 | 2006-09-18 | Reactive compensating device for low voltage distribution system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101814737A (en) * | 2010-04-15 | 2010-08-25 | 济南银河电气有限公司 | Pressure regulating and capacitance regulating reactive power automatic compensation method |
| CN102332723A (en) * | 2011-09-21 | 2012-01-25 | 湖南大学 | Automatic resonance type electric power filtering and continuous reactive power compensation hybrid system |
| CN102570475A (en) * | 2011-12-10 | 2012-07-11 | 国网电力科学研究院 | SVC (static var compensator) allocation method for improving transient voltage security of electric distribution network |
| CN103236743A (en) * | 2013-05-07 | 2013-08-07 | 河南龙翔电气有限责任公司 | Combined intelligent amorphous alloy transformer |
| CN103731011A (en) * | 2013-12-31 | 2014-04-16 | 深圳航天科技创新研究院 | High-reliability device used for converting constant current to constant voltage and applied to remote highway power-feeding |
-
2006
- 2006-09-18 CN CNU2006201386325U patent/CN200947547Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101814737A (en) * | 2010-04-15 | 2010-08-25 | 济南银河电气有限公司 | Pressure regulating and capacitance regulating reactive power automatic compensation method |
| CN101814737B (en) * | 2010-04-15 | 2012-01-25 | 济南银河电气有限公司 | Pressure regulating and capacitance regulating reactive power automatic compensation method |
| CN102332723A (en) * | 2011-09-21 | 2012-01-25 | 湖南大学 | Automatic resonance type electric power filtering and continuous reactive power compensation hybrid system |
| CN102332723B (en) * | 2011-09-21 | 2014-04-09 | 湖南大学 | Automatic resonance type electric power filtering and continuous reactive power compensation hybrid system |
| CN102570475A (en) * | 2011-12-10 | 2012-07-11 | 国网电力科学研究院 | SVC (static var compensator) allocation method for improving transient voltage security of electric distribution network |
| CN102570475B (en) * | 2011-12-10 | 2014-04-30 | 国电南瑞科技股份有限公司 | SVC (static var compensator) allocation method for improving transient voltage security of electric distribution network |
| CN103236743A (en) * | 2013-05-07 | 2013-08-07 | 河南龙翔电气有限责任公司 | Combined intelligent amorphous alloy transformer |
| CN103236743B (en) * | 2013-05-07 | 2016-02-10 | 河南龙翔电气有限责任公司 | Combined intelligent amorphous alloy transformer |
| CN103731011A (en) * | 2013-12-31 | 2014-04-16 | 深圳航天科技创新研究院 | High-reliability device used for converting constant current to constant voltage and applied to remote highway power-feeding |
| CN103731011B (en) * | 2013-12-31 | 2016-05-11 | 深圳航天科技创新研究院 | A kind of highly reliable constant current for highway remote power-feeding turns constant-voltage equipment |
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| Date | Code | Title | Description |
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| 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: 20070912 Termination date: 20091019 |