CN103701137A - Low voltage dynamic reactive power compensation device - Google Patents
Low voltage dynamic reactive power compensation device Download PDFInfo
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- CN103701137A CN103701137A CN201310715921.1A CN201310715921A CN103701137A CN 103701137 A CN103701137 A CN 103701137A CN 201310715921 A CN201310715921 A CN 201310715921A CN 103701137 A CN103701137 A CN 103701137A
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- relay
- load line
- power compensation
- reactive power
- plc controller
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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 invention discloses a low voltage dynamic reactive power compensation device, comprising a power compensation controller and at least one capacitor bank, wherein the power compensation controller comprises an electric parameter detecting circuit used for detecting electric parameter signals of a bus and a load line, a signal conditioning circuit used for amplifying and filtering the electric parameter signals, a PLC (Programmable Logic Controller) used for performing computational analysis on the electric parameter signals and sending a control signal and a relay which is connected between the capacitor bank and the load line in series; the control signal output end of the PLC is connected with the control end of the relay. The device is simple in structure, reasonable in design, and capable of performing rapid and intelligent reactive power compensation according to the power grid change, realizing voltage zero passage switching when a capacitor is switched; overvoltage cannot be easily produced, the noise is small when switching is performed, the service life is long, and the remote unified management is realized.
Description
Technical field
The present invention relates to a kind of power compensating device, related in particular to a kind of low-voltage dynamic reactive power compensation arrangement.
Background technology
The use of low-voltage reactive power automatic compensation device can reduce power supplying and distributing equipment electric energy loss, improve power supplying and distributing equipment utilance, and improve to a certain extent the quality of voltage for power-distribution electric energy, therefore be always subject to power supply enterprise and electricity consumption client's great attention, be subject to applying very widely.Low-voltage reactive power automatic compensation device has the history of many decades, development due to electric power, electrical equipment and electronic technology, device performance improves constantly, particularly modern power electronic and the microelectric technique application on low-voltage reactive power automatic compensation device, the switch performance of switching low-voltage electric power capacitor is greatly improved, and can realizes the greater functionality of the aspects such as measurement, statistics.
But present society is generally to carry out switching low-voltage electric power capacitor group by A.C. contactor by the structure of low-voltage reactive power automatic compensation device, exist following not enough: the one, response speed is slow, can not follow electrical network variation and carry out fast intelligent powerless compensation; The 2nd, the capacitor switching time can not be realized voltage zero-cross switching, easily produces overvoltage, thereby causes the earlier period damage of equipment; The 3rd, during switching, noise is large, and useful life is short.In addition, current low-voltage reactive power automatic compensation device is all to use at monomer, and relevant department cannot effectively manage it.
Summary of the invention
The object of the invention is to for the deficiencies in the prior art, provide a kind of simple in structure, reasonable in design, can change while carrying out quick, intelligent reactive power compensation, capacitor switching according to electrical network can realize voltage zero-cross switching, little, the long service life of noise and can realize the low-voltage dynamic reactive power compensation arrangement of long-range unified management while being difficult for producing overvoltage, switching.
To achieve these goals, the present invention has adopted following technical scheme:
A low-voltage dynamic reactive power compensation arrangement, comprises power compensating controller and at least one capacitor group; Wherein, described power compensating controller comprise electrical parameters detection circuit for detection of the electrical quantity signal of bus and load line, to electrical quantity signal amplifies and filtering is processed signal conditioning circuit, for electrical quantity signal being carried out to computational analysis and sending the PLC controller of control signal and be connected on the relay on circuit between capacitor group and load line; The control signal output of described PLC controller is connected with the control end of relay; Described electrical parameters detection circuit gathers respectively the electrical quantity signal of bus and load line by electric current, voltage transformer, then via signal conditioning circuit amplification, filtering, after processing, be transferred to PLC controller; Described PLC controller receives after electrical quantity signal, and it is carried out to computational analysis, judges whether to carry out power back-off to load line, if desired, to relay, sends conducting control signal, makes corresponding capacitor group carry out power back-off to load line.
Described power compensating controller also comprises a 3G communication module; Described 3G communication module is connected with PLC controller; Described PLC controller is uploaded to administrative center by 3G communication module by the result of the electrical quantity signal of reception, computational analysis and the control signal packing of sending.
Described relay adopts electromagnetic relay.
In the present invention, load line is connected with bus by safety box, load line master switch successively.The internal capacitance of capacitor group adopts △ or Y type connected mode.The all parts of compensation arrangement is installed in compensation arrangement housing, and is also provided with lightning arrester on housing.
PLC:Programmable Logic Controller, programmable logic controller (PLC), the electronic system of a kind of digital operation operation, aims in industrial environment application and design.It adopts a class programmable memory, for its internally stored program, and actuating logic computing, sequential control, regularly, the user oriented instructions such as counting and arithmetical operation, and control various types of machinery or production process by numeral or analog pattern input/output.
Electromagnetic relay is generally comprised of electromagnet, armature, spring leaf, contact etc., and its operating circuit consists of low-voltage control circuit and high-pressure work circuit two parts.Electromagnetic relay can also realize far distance controlled and automation is controlled.As long as add certain voltage at coil two ends, in coil, will flow through certain electric current, thereby generation galvanomagnetic effect, armature will overcome the pulling force of return spring under the effect of electromagnetic attracting force to be inhaled to iron core, thereby with moving contact and fixed contact (normally opened contact) adhesive of moving armature.After coil blackout, the suction of electromagnetism also disappears thereupon, and armature will return to original position at the reaction force of spring, makes moving contact and original fixed contact (normally-closed contact) release.Adhesive like this, release, thus reached the conducting in circuit, the object of cut-out.
Advantage of the present invention:
Simple in structure, reasonable in design, long service life, adopt the operational factor of the PLC controller real-time analysis calculating electrical network of technical grade, and the switching of control capacitor group whether, can change and to carry out quick, intelligent reactive power compensation according to electrical network, and can realize voltage zero-cross switching during capacitor switching, be difficult for producing overvoltage; Adopt relay as the fling-cut equipment of capacitor group, during switching, noise is little; On compensation arrangement, set up a 3G communication module, for uploading data, can allow administrative center can understand in time the working condition of each compensation arrangement, and then understand the ruuning situation of whole electrical network.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Reference numeral: 1-bus, 2-load line master switch, 3-safety box, 4-load line, 5-capacitor group, 6-relay, 7-electrical parameters detection circuit, 8-signal conditioning circuit, 9-PLC controller, 10-3G communication module.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
Embodiment 1:
As shown in Figure 1, a kind of low-voltage dynamic reactive power compensation arrangement, comprises power compensating controller and at least one capacitor group 5; Wherein, described power compensating controller comprise electrical parameters detection circuit 7 for detection of the electrical quantity signal of bus 1 and load line 4, to electrical quantity signal amplifies and filtering is processed signal conditioning circuit 8, for electrical quantity signal is carried out to computational analysis and send control signal PLC controller 9, be connected on the relay 6 on circuit between capacitor group 5 and load line 4 and for the 3G communication module of uploading data; The control signal output of described PLC controller 9 is connected with the control end of relay 6; Described electrical parameters detection circuit 7 gathers respectively the electrical quantity signal of bus 1 and load line 4 by electric current, voltage transformer, then via signal conditioning circuit 8 amplifications, filtering, after processing, be transferred to PLC controller 9; Described PLC controller 9 receives after electrical quantity signal, it is carried out to computational analysis, judge whether to carry out power back-off to load line 4, if desired, to relay 6, send conducting control signal, make 5 pairs of load lines of corresponding capacitor group 4 carry out power back-off.Described PLC controller 9 is uploaded to administrative center by 3G communication module 10 by the result of the electrical quantity signal of reception, computational analysis and the control signal packing of sending.
This low-voltage dynamic reactive power compensation arrangement is simple in structure, reasonable in design, can change carry out quick, intelligent reactive power compensation, capacitor switching time according to electrical network can realize voltage zero-cross switching, little, the long service life of noise and can realize long-range unified management while being difficult for producing overvoltage, switching.
Claims (3)
1. a low-voltage dynamic reactive power compensation arrangement, comprises power compensating controller and at least one capacitor group (5); It is characterized in that: described power compensating controller comprise for detection of the electrical parameters detection circuit (7) of the electrical quantity signal of bus (1) and load line (4), to electrical quantity signal amplifies and filtering is processed signal conditioning circuit (8), for electrical quantity signal is carried out to computational analysis and send the PLC controller (9) of control signal and be connected on capacitor group (5) and load line (4) between relay (6) on circuit; The control signal output of described PLC controller (9) is connected with the control end of relay (6); Described electrical parameters detection circuit (7) gathers respectively the electrical quantity signal of bus (1) and load line (4) by electric current, voltage transformer, then via signal conditioning circuit (8) amplification, filtering, after processing, be transferred to PLC controller (9); Described PLC controller (9) receives after electrical quantity signal, it is carried out to computational analysis, judge whether to carry out power back-off to load line (4), if desired, to relay (6), send conducting control signal, make corresponding capacitor group (5) carry out power back-off to load line (4).
2. low-voltage dynamic reactive power compensation arrangement according to claim 1, is characterized in that: described power compensating controller also comprises a 3G communication module (10); Described 3G communication module (10) is connected with PLC controller (9); Described PLC controller (9) is uploaded to administrative center by 3G communication module (10) by the result of the electrical quantity signal of reception, computational analysis and the control signal packing of sending.
3. low-voltage dynamic reactive power compensation arrangement according to claim 1 and 2, is characterized in that: described relay (6) adopts electromagnetic relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310715921.1A CN103701137A (en) | 2013-12-23 | 2013-12-23 | Low voltage dynamic reactive power compensation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310715921.1A CN103701137A (en) | 2013-12-23 | 2013-12-23 | Low voltage dynamic reactive power compensation device |
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| Publication Number | Publication Date |
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| CN103701137A true CN103701137A (en) | 2014-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310715921.1A Pending CN103701137A (en) | 2013-12-23 | 2013-12-23 | Low voltage dynamic reactive power compensation device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105048481A (en) * | 2015-08-26 | 2015-11-11 | 广东中钰科技股份有限公司 | Magnetic control type high-voltage dynamic reactive power compensation device |
| CN108767868A (en) * | 2018-06-14 | 2018-11-06 | 重庆明斯克电力建设工程有限责任公司 | Low-voltage circuit on-load voltage regulation compensation device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2702083Y (en) * | 2004-06-24 | 2005-05-25 | 西安森宝电气工程有限公司 | Pressure regulation and reactive compensation controlling device of beam-pumping unit |
| CN201061150Y (en) * | 2007-04-23 | 2008-05-14 | 曾卫民 | Intelligent reactive compensation contactless routing switching mechanism |
| CN203086150U (en) * | 2013-03-19 | 2013-07-24 | 重庆市黔江区供电有限责任公司 | Maintenance-free intelligent reactive compensation monitoring system |
-
2013
- 2013-12-23 CN CN201310715921.1A patent/CN103701137A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2702083Y (en) * | 2004-06-24 | 2005-05-25 | 西安森宝电气工程有限公司 | Pressure regulation and reactive compensation controlling device of beam-pumping unit |
| CN201061150Y (en) * | 2007-04-23 | 2008-05-14 | 曾卫民 | Intelligent reactive compensation contactless routing switching mechanism |
| CN203086150U (en) * | 2013-03-19 | 2013-07-24 | 重庆市黔江区供电有限责任公司 | Maintenance-free intelligent reactive compensation monitoring system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105048481A (en) * | 2015-08-26 | 2015-11-11 | 广东中钰科技股份有限公司 | Magnetic control type high-voltage dynamic reactive power compensation device |
| CN108767868A (en) * | 2018-06-14 | 2018-11-06 | 重庆明斯克电力建设工程有限责任公司 | Low-voltage circuit on-load voltage regulation compensation device |
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Application publication date: 20140402 |