CN202474878U - Low-voltage asymmetric reactive compensation device - Google Patents
Low-voltage asymmetric reactive compensation device Download PDFInfo
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- CN202474878U CN202474878U CN 201220101786 CN201220101786U CN202474878U CN 202474878 U CN202474878 U CN 202474878U CN 201220101786 CN201220101786 CN 201220101786 CN 201220101786 U CN201220101786 U CN 201220101786U CN 202474878 U CN202474878 U CN 202474878U
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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 low-voltage asymmetric reactive compensation device, which comprises a detection unit, a controller, a display unit, a control unit and a capacitor bank, wherein the detection unit is connected with the controller; the controller is connected with the capacitor bank through the control unit; the display unit is connected to the controller; the detection unit is composed of a sensor and takes charge of respectively detecting the voltage, current and frequency of a three-phase electric supply; the controller processes data collected by the detection unit, performs conversion on the data to obtain active power, reactive power and a capacitance value to be compensated, and generates a control signal input to the control unit; and the control unit receives the control signal from the controller to achieve on or off, and carries out switching on the capacitor bank.. As the low-voltage asymmetric reactive compensation device adopts split-phase detection and compensation technologies, the conventional full-phase compensation is changed into split-phase compensation, the conventional common compensation is changed into separated compensation, and three-phase unbalance is relieved according to a filling and polishing principle, thus ensuring an optimal reactive compensation effect.
Description
Technical field
The utility model relates to the reactive power compensation technology field, the asymmetric reactive power compensator of particularly a kind of low pressure.
Background technology
Reactive power compensation can improve quality of voltage, improves power factor, is one of conservation measures of electrical network employing.Reactive power compensation mode commonly used in the power distribution network is: the part in electric power system becomes, in the distribution substation and in each user, reactive power compensator is installed; In the high and low voltage electric distribution circuit, disperse to install the shunt capacitance unit; Shunt capacitor is installed between distribution transformer low-pressure side and workshop switchboard and near the separate unit motor, shunt capacitor is installed, the local compensation of concentrating or disperseing.
Compensation way commonly used has local compensation, compensation and centralized compensation divide into groups.With regard to three kinds of compensation ways, reactive power compensation on the spot has overcome the shortcoming of centralized compensation with the compensation of dividing into groups, and is a kind of comparatively perfect compensation way.In the practice, use that to be local compensation basically in the whole electric power system with divide into groups compensation or centralized compensation combine.It is a kind of according to instruction for tradition compensation, the compensation of continuously load or burden without work being carried out by a fixed step size or its multiple.Improve the asynchronous motor of power supply-distribution system and operation continuously, all kinds of reactive power compensation devices of other inductive load power factor with shunt capacitor.This compensation switching is fixed against the action of contactor, when the load of electrical network is perception, as uses a large amount of motor, electric welding machine even load, at this moment angle of electric current lagging voltage of electrical network.When load was capacitive, like the controller of excessive compensation arrangement, at this moment the electric current of electrical network was ahead of an angle of voltage, and promptly power factor is leading or lag behind and be meant the phase relation of electric current and voltage.Controller through compensation arrangement detects the physical quantity of electric power system, decides the switching of capacitor, and this physical quantity can be power factor or reactive current or reactive power.But there is following problem: 1, can not accomplish fine compensation, be not suitable for changing fast occasion in load or burden without work; 2, adopt full phase compensation way; The compensation capacity of compensation arrangement is that fixed step size or its multiple can not change with load; Can only grading compensation fixing reactive power (its compensation precision is decided by the capacitance of single capacitor in the capacitor group), and can not realize continuous, linear compensation." owe to mend " and " cross and mend " alternately generation.After employing compensates entirely mutually; Because it is the reactive factor that detects immobile phase, but in fact often the reactive power of each phase is different, adopt full compensation mutually to cause receiving phase-detecting is that compensation has put in place; But cause other two compensation imbalance mutually easily, cause the part phase sequence to cross and mend or owe to mend.Be prone to cause three-phase compensation uneven (part is crossed benefit, part owes to mend); 3, capacity setting does not match; 4, load change causes and does not match.
The utility model content
For overcoming the deficiency that above-mentioned similar technology exists, the purpose of the utility model provides the asymmetric reactive power compensator of a kind of low pressure, and it can solve the deficiency of traditional compensating controller on capacitor is provided with and the deficiency of idle sampling.
The technical scheme of the utility model is: the asymmetric reactive power compensator of a kind of low pressure; Comprise detecting unit, controller, display unit, control unit and capacitor group; Said detecting unit connects controller, and said controller is connected with the capacitor group through control unit, and said display unit is connected on the controller; Said detecting unit is made up of transducer, and said detecting unit is responsible for voltage, electric current, the frequency of three-phase mains are detected respectively; Data that said controller processing and detecting unit collects and the capacitance that its conversion is obtained active power, reactive power and will compensate, and produce the control signal that is input to control unit; The control signal that control unit receives controller realizes being switched on or switched off, and carries out the switching of capacitor group.
Wherein: said control unit is made up of a plurality of A.C. contactors.
As optimal technical scheme, the said capacitor group of the utility model comprises three independences and disposes identical capacitor bank units.
As optimal technical scheme, the said capacitor bank units of the utility model is made up of 12 capacitors, and its specification is respectively 1UF, 2UF, 2UF, 5UF; 10UF, 20UF, 20UF, 50UF; 100UF, 200UF, 200UF, 500UF.
The beneficial effect of the utility model is:
The utility model has adopted phase-splitting detection and compensation technique, will compensate mutually entirely originally and change phase splitting compensation into.To mend altogether and change branch into and mend,, relax three-phase imbalance, not only economy but also reasonable according to " filling up " principle.To capacitance by metric mode hierarchical composition, through confirm Board Lot its in individual position, the respective digital of ten, hundred, kilobit or even myriabit, each rank capacity mode of switching is respectively realized the adjusting of condenser capacity.Thereby realized idle fine compensation, thereby the situation of owing to mend of mending excessively of having avoided traditional compensation way to cause takes place to any phase in the three-phase confession.
Description of drawings
Fig. 1 is the structure principle chart of the utility model.
Fig. 2 is the control loop winding diagram of the utility model.
Fig. 3 is the major loop winding diagram of the utility model.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
With reference to accompanying drawing, the specific embodiment 1 of the utility model is proposed, as shown in the figure; The asymmetric reactive power compensator of a kind of low pressure comprises detecting unit, controller, display unit, control unit and capacitor group, and said detecting unit connects controller; Said controller is connected with the capacitor group through control unit; Said display unit is connected on the controller, and said detecting unit is made up of transducer, and said detecting unit is responsible for voltage, electric current, the frequency of three-phase mains are detected respectively; Data that said controller processing and detecting unit collects and the capacitance that its conversion is obtained active power, reactive power and will compensate, and produce the control signal that is input to control unit; The control signal that control unit receives controller realizes being switched on or switched off, and carries out the switching of capacitor group.Also be provided with the change process feedback unit of transducer in the present embodiment, said change process feedback unit connects between transducer and the controller.
Said capacitor group comprises three, and independently to dispose identical capacitor bank units be A phase capacitor group, B phase capacitor group and C capacitor group mutually.Said capacitor bank units is made up of 12 capacitors, and its specification is respectively 1UF, 2UF, 2UF, 5UF; 10UF, 20UF, 20UF, 50UF; 100UF, 200UF, 200UF, 500UF.
Wherein: said control unit is made up of a plurality of A.C. contactors.Every corresponding A.C. contactor of capacitor in the capacitor bank units.With reference to Fig. 2, Fig. 3, A.C. contactor has J1, J2, J3......J35, J36.
The operation principle of the utility model:
At first, be sent to controller then and carry out data processing and conversion, finally confirm the offset of every phase civil power by the sensor acquisition civil power data of detecting unit.With A is example mutually; The capacitance of 12 capacitor C1 to C12 of A phase capacitor group is respectively 500UF, 200UF, 200UF, 100UF, 50UF, 20UF, 20UF, 10UF, 5UF, 2UF, 2UF, 1UF calculates through controller need the switching capacitance value be 780UF, could satisfy the electronic compensating requirement of A phase city.Controller promptly can obtain desired volume through control J1, J2, J5, J6, J8 action like this.Corresponding control relation is: control A phase C1+C2+C5+C6+C8 can find C1=500uf from the terminal table definition; C2=200uf; C5=50uf; C6=20uf; Several additions of C8=10uf just equal 780uf.Other two phase (B phase, C phase) account form is identical.
The above is merely the preferred embodiment of the utility model; Be not therefore and the claim of restriction the utility model; Every equivalent structure transformation that utilizes the utility model specification and accompanying drawing content to be done; Or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the utility model.
Claims (4)
1. asymmetric reactive power compensator of low pressure; It is characterized in that: comprise detecting unit, controller, display unit, control unit and capacitor group; Said detecting unit connects controller, and said controller is connected with the capacitor group through control unit, and said display unit is connected on the controller; Said detecting unit is made up of transducer, and said detecting unit is responsible for voltage, electric current, the frequency of three-phase mains are detected respectively; Data that said controller processing and detecting unit collects and the capacitance that its conversion is obtained active power, reactive power and will compensate, and produce the control signal that is input to control unit; The control signal that control unit receives controller realizes being switched on or switched off, and carries out the switching of capacitor group.
2. the asymmetric reactive power compensator of low pressure according to claim 1 is characterized in that: said capacitor group comprises three independences and disposes identical capacitor bank units.
3. the asymmetric reactive power compensator of low pressure according to claim 2 is characterized in that: said capacitor bank units is made up of 12 capacitors, and its specification is respectively 1UF, 2UF, 2UF, 5UF; 10UF, 20UF, 20UF, 50UF; 100UF, 200UF, 200UF, 500UF.
4. the asymmetric reactive power compensator of low pressure according to claim 3, it is characterized in that: said control unit is made up of a plurality of A.C. contactors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220101786 CN202474878U (en) | 2012-03-19 | 2012-03-19 | Low-voltage asymmetric reactive compensation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220101786 CN202474878U (en) | 2012-03-19 | 2012-03-19 | Low-voltage asymmetric reactive compensation device |
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| CN202474878U true CN202474878U (en) | 2012-10-03 |
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| CN 201220101786 Expired - Fee Related CN202474878U (en) | 2012-03-19 | 2012-03-19 | Low-voltage asymmetric reactive compensation device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103986169A (en) * | 2014-05-29 | 2014-08-13 | 广东电网公司电力调度控制中心 | Method for controlling static var compensator under power grid asymmetrical fault condition |
| CN106771507A (en) * | 2017-01-20 | 2017-05-31 | 泰州学院 | Based on the synchronous Fast reactive current of voltage reference split-phase |
-
2012
- 2012-03-19 CN CN 201220101786 patent/CN202474878U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103986169A (en) * | 2014-05-29 | 2014-08-13 | 广东电网公司电力调度控制中心 | Method for controlling static var compensator under power grid asymmetrical fault condition |
| CN106771507A (en) * | 2017-01-20 | 2017-05-31 | 泰州学院 | Based on the synchronous Fast reactive current of voltage reference split-phase |
| CN106771507B (en) * | 2017-01-20 | 2020-02-14 | 泰州学院 | Reactive current rapid detection method based on voltage reference split-phase synchronization |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121003 Termination date: 20150319 |
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| EXPY | Termination of patent right or utility model |