CN102983579A - High-power dynamic switching unit and implementation method thereof - Google Patents
High-power dynamic switching unit and implementation method thereof Download PDFInfo
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- CN102983579A CN102983579A CN2012104594724A CN201210459472A CN102983579A CN 102983579 A CN102983579 A CN 102983579A CN 2012104594724 A CN2012104594724 A CN 2012104594724A CN 201210459472 A CN201210459472 A CN 201210459472A CN 102983579 A CN102983579 A CN 102983579A
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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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- 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
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
The invention discloses a high-power dynamic switching unit and an implementation method of the high-power dynamic switching unit, and mainly solves the problems that a switching unit in the prior art can not move frequently, and safety and reliability are not high. The high-power dynamic switching unit comprises an outer shell, a current signal zero passage sampling circuit, a control unit and a high-power electric power module, wherein the current signal zero passage sampling circuit, the control unit and the high-power electric power module are arranged in the outer shell and are connected in sequence. An input end of the control unit is connected with a controller, and an output end of the high-power electric power module is connected with a load power capacitor. Through the technical scheme, the purposes that switching operations can be carried out frequently, and safety and reliability are high are achieved, and the high-power dynamic switching unit has high practical value and popularization value.
Description
Technical field
The present invention relates to a kind of switching unit, specifically, relate to a kind of high-power dynamic switching unit and its implementation.
Background technology
In order to improve the power factor of electrical network in the electronic power system, reduce the loss of supply transformer and conveying circuit, improve power supplying efficiency, improve the power supply environment, need use reactive power compensator, thereby the quality of reactive power compensator performance is for determining the important factor of compensation effect.
As everyone knows, the switching mode of reactive power compensator is for determining its safety in utilization, reliability, the important factor of compensation effect, traditional reactive power compensator mostly adopts contactor or vacuum circuit-breaker to carry out switching, there is spring in such switching mode in making process, restrike and the overvoltage equivalent risk, can produce larger impulse current during combined floodgate, electric capacity needs certain discharge blanking time behind the major loop separating brake, thereby this compensation arrangement can not frequent movement, can not in time respond the fluctuation of load, easily produced and mend and owe to mend, the reactive power that the impact load produces can not effective compensation, can not solve the spread of voltage that impact load brings, flicker changes, system losses are large and reduce the problem such as load transformer capacity.In addition, adopt contactor or vacuum circuit-breaker opening-closing capacitor bank when each input capacitor group, owing to can not select the input phase angle of control switch contact, can cause larger inrush phenomenon, produce overvoltage during excision and cause easily the switch contact damage, so that capacitor shortening in useful life has had a strong impact on the useful life of installing self, also can bring pollution to distribution system simultaneously.
Summary of the invention
The object of the present invention is to provide a kind of high-power dynamic switching unit, mainly solving the switching unit that exists in the prior art can not frequent movement, the problem that safety and reliability is not high.
To achieve these goals, the technical solution used in the present invention is as follows:
A kind of high-power dynamic switching unit, comprise shell, also comprise and all be arranged in the shell and the current signal zero passage sample circuit, control unit, the high-power electric module that link to each other successively, the input of described control unit is connected with controller, and the output of described high-power electric module is connected with the load electric capacitor.
In order to improve antijamming capability of the present invention, the casing that the all-metal that described shell is made for the employing isolation technology shields.
In order to realize that oncontacting reveals switching, described high-power electric module controllable silicon electric power controller, described controllable silicon electric power controller also is connected with fast acting fuse.
As preferably, described control unit is the DSP digital signal processor.
Consider that the present invention is mainly used in the high-power electric module, caloric value is larger, also is provided with ventilating system on the described shell.
Based on above-mentioned hardware device, the invention provides the implementation method of a kind of high-power dynamic switching unit, may further comprise the steps:
(1) controller is sent to control unit with the switching signal instruction;
(2) when control unit receives the current zero-crossing signal of current signal zero passage sample circuit, then the current over-zero trigger impulse is sent to the high-power electric module;
(3) the high-power electric module is carried out the switching operation to the load electric capacitor after receiving the current over-zero trigger impulse.
Specifically, described control unit is the DSP digital signal processor, and its control high-power electric module adopts the mode of coding switching that the load electric capacitor is carried out the switching operation.
Compared with prior art, the present invention has following beneficial effect:
(1) the present invention can effectively improve the power factor of power load, improves the actual loading ability of transformer, and the loss of supply transformer and conveying circuit improves power supplying efficiency in the reduction electronic power system, improves the power supply environment, has significant energy-saving effect.
(2) the present invention adopts the controllable silicon electric power controller as switch, the shortcomings such as the common existing surge current of contactor opening-closing capacitor bank is large, the response time is long, maintenance cost is high and lack useful life have been overcome, can follow the tracks of the load reactive current changes, thereby power capacitor bank is adopted the zero passage quick-switching, and in the excision process without switching overvoltage, arc reignition phenomenon, but fast frequent switching, noiselessness, long service life of response time, maintenance capacity is few, range of application is very extensive, it is very convenient to use.
(3) the all-metal shielding case body of the shell among the present invention for adopting advanced isolation technology to be made, it has stronger antijamming capability, and can design and produce according to user's actual need installation, simple to operate, reliable, easy to maintenance, very easy to use.
(4) among the present invention, the controllable silicon electric power controller is connected with fast acting fuse, and this fast acting fuse can carry out overcurrent and short-circuit protection to the controllable silicon electric power controller, has improved reliability and the fail safe in the application process.
(5) be provided with ventilating system among the present invention, it can prevent effectively that excess Temperature has further been guaranteed useful life of the present invention to each device injury in the casing.
(6) support of the present invention " coding switching ", the load electric capacitor can adopt and not wait the mode of capacity grouping to make up configuration by digital coding, thereby consist of multistage power capacitor switching, realize that by coded combination corresponding to required building-out capacitor amount single compensation puts in place during switching, do not need step by step switching, thereby be conducive to improve compensation precision, also avoided simultaneously the phenomenon of " throw in-of oscillation " to occur.
Description of drawings
Fig. 1 is system block diagram of the present invention.
Embodiment
The invention will be further described below in conjunction with drawings and Examples, and embodiments of the present invention include but not limited to the following example.
Embodiment
Can not frequent movement in order to solve the switching unit that exists in the prior art, the problem that safety and reliability is not high, as shown in Figure 1, the invention discloses a kind of high-power dynamic switching unit, comprise shell, the casing that the all-metal that this shell is made for the employing isolation technology shields, thereby have stronger antijamming capability; In the enclosure current signal zero passage sample circuit, control unit, high-power electric module all are set; And the output of current signal zero passage sample circuit links to each other with control unit, and the output of control unit links to each other with the high-power electric module.Wherein, the input of control unit is connected with the controller of control switching signal output; The output of high-power electric module is connected with the load electric capacitor.
In the present invention, reveal switching in order to realize oncontacting, described high-power electric module is the high power contactless power module.As preferably, among the present invention, this high power contactless power module is the controllable silicon electric power controller, and for this controllable silicon electric power controller is carried out overcurrent and short-circuit protection, described controllable silicon electric power controller also is connected with fast acting fuse.
Reliability when using in order to ensure the present invention, control unit are selected the comparatively powerful DSP digital signal processor of function.
Consider that the present invention is mainly used in the high-power electric module, caloric value is larger, also is provided with ventilating system on the described shell.Because each module, device, system are prior art among the present invention, just more do not speak more bright at this.
Based on above-mentioned hardware device, the invention provides the implementation method of a kind of high-power dynamic switching unit, may further comprise the steps: peripheral control unit sends the switching signal instruction to the control unit of high-power dynamic switching unit, when control unit receives the current zero-crossing signal of current signal zero passage sample circuit, then send the current over-zero trigger impulse to the high-power electric module, the high-power electric module is then carried out the switching operation to the external loading power capacitor after receiving this trigger impulse.
Specifically, described control unit is the DSP digital signal processor, and its control high-power electric module adopts the mode of coding switching that the load electric capacitor is carried out the switching operation.
Adopt in the present invention the electronic switch of machinery-free contact, can follow the tracks of the load reactive current changes, thereby load electric capacitor group is adopted the zero passage quick-switching, in the switching process without switching overvoltage, arc reignition phenomenon, but fast frequent switching of response time, noiselessness, long service life, maintenance capacity are few, but can any voltage, any state after the capacitor excision automatically drop into, phase-splitting switching also.
According to above-described embodiment, just can realize well the present invention.
Claims (8)
1. high-power dynamic switching unit, comprise shell, it is characterized in that, also comprise and all be arranged in the shell and the current signal zero passage sample circuit, control unit, the high-power electric module that link to each other successively, the input of described control unit is connected with controller, and the output of described high-power electric module is connected with the load electric capacitor.
2. a kind of high-power dynamic switching according to claim 1 unit is characterized in that, described shell is the casing of the all-metal shielding adopting isolation technology and be made.
3. a kind of high-power dynamic switching according to claim 2 unit is characterized in that described high-power electric module is the controllable silicon electric power controller.
4. a kind of high-power dynamic switching according to claim 3 unit is characterized in that described controllable silicon electric power controller also is connected with fast acting fuse.
5. a kind of high-power dynamic switching according to claim 4 unit is characterized in that described control unit is the DSP digital signal processor.
6. a kind of high-power dynamic switching according to claim 5 unit is characterized in that, also is provided with ventilating system on the described shell.
7. the implementation method of the described a kind of high-power dynamic switching of any one unit is characterized in that according to claim 1 ~ 6, may further comprise the steps:
(1) controller is sent to control unit with the switching signal instruction;
(2) when control unit receives the current zero-crossing signal of current signal zero passage sample circuit, then the current over-zero trigger impulse is sent to the high-power electric module;
(3) the high-power electric module is carried out the switching operation to the load electric capacitor after receiving the current over-zero trigger impulse.
8. the implementation method of a kind of high-power dynamic switching according to claim 7 unit, it is characterized in that, described control unit is the DSP digital signal processor, and its control high-power electric module adopts the mode of coding switching that the load electric capacitor is carried out the switching operation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012104594724A CN102983579A (en) | 2012-11-15 | 2012-11-15 | High-power dynamic switching unit and implementation method thereof |
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| CN2012104594724A CN102983579A (en) | 2012-11-15 | 2012-11-15 | High-power dynamic switching unit and implementation method thereof |
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| CN102983579A true CN102983579A (en) | 2013-03-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108828404A (en) * | 2018-05-09 | 2018-11-16 | 国网浙江省电力有限公司电力科学研究院 | Low-voltage platform area electric topology identification system and method for fast failure positioning |
Citations (5)
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| JPH05189068A (en) * | 1992-01-13 | 1993-07-30 | Meidensha Corp | Control method for reactive power compensation device |
| CN201181848Y (en) * | 2008-04-28 | 2009-01-14 | 天津市津开电气有限公司 | Filter device of intelligent dynamic reactive-load compensation thyristor |
| CN201260080Y (en) * | 2008-08-29 | 2009-06-17 | 东莞市友美电源设备有限公司 | Device for passive compensation and harmonic wave control for intelligent electric power system |
| CN201750154U (en) * | 2010-06-11 | 2011-02-16 | 四川省科学城久信科技有限公司 | High-voltage dynamic reactive power compensation intelligent phase selection switching controller |
| CN202957605U (en) * | 2012-11-15 | 2013-05-29 | 成都星宇节能技术股份有限公司 | High power dynamic cutting unit |
-
2012
- 2012-11-15 CN CN2012104594724A patent/CN102983579A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05189068A (en) * | 1992-01-13 | 1993-07-30 | Meidensha Corp | Control method for reactive power compensation device |
| CN201181848Y (en) * | 2008-04-28 | 2009-01-14 | 天津市津开电气有限公司 | Filter device of intelligent dynamic reactive-load compensation thyristor |
| CN201260080Y (en) * | 2008-08-29 | 2009-06-17 | 东莞市友美电源设备有限公司 | Device for passive compensation and harmonic wave control for intelligent electric power system |
| CN201750154U (en) * | 2010-06-11 | 2011-02-16 | 四川省科学城久信科技有限公司 | High-voltage dynamic reactive power compensation intelligent phase selection switching controller |
| CN202957605U (en) * | 2012-11-15 | 2013-05-29 | 成都星宇节能技术股份有限公司 | High power dynamic cutting unit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108828404A (en) * | 2018-05-09 | 2018-11-16 | 国网浙江省电力有限公司电力科学研究院 | Low-voltage platform area electric topology identification system and method for fast failure positioning |
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Application publication date: 20130320 |