CN102013686A - Integrated intelligent variable capacitor - Google Patents
Integrated intelligent variable capacitor Download PDFInfo
- Publication number
- CN102013686A CN102013686A CN2010102841605A CN201010284160A CN102013686A CN 102013686 A CN102013686 A CN 102013686A CN 2010102841605 A CN2010102841605 A CN 2010102841605A CN 201010284160 A CN201010284160 A CN 201010284160A CN 102013686 A CN102013686 A CN 102013686A
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- capacitor
- capacitance value
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- elementary cell
- coding
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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
-
- 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
- Y02E40/40—Arrangements for reducing harmonics
Abstract
The invention discloses an integrated intelligent variable capacitor, which comprises a shell and a capacitor bank arranged in the shell. The integrated intelligent variable capacitor is characterized in that: the capacitor bank comprises a plurality of basic capacitor units, wherein the minimum capacitance value in the basic capacitor units is used as a base number, and the multiplying power of the capacitance value of each basic capacitor unit relative to the base number corresponds to a digital value with bit right in a numerical value coding system; and the capacitor bank is provided with a control system and a switching mechanism, wherein the control system comprises a control signal receiving device and a coding scheme generating device, and the coding scheme generating device generates a code according to the control signal received by the control signal receiving device to control the operation of the switching mechanism and realize output of capacitance values. Adjustment of random precision and random range of the capacitor can be realized, and the capacitor can be conveniently manufactured into nominal series products and products of special specifications customized according to special requirements.
Description
Technical field
The present invention relates to a kind of capacitor, be specifically related to the controlled and variable capacitor of a kind of incorporate output capacitance value, can be used for reactive power compensation and the use of harmonic wave cancellation element in the mains supply system.
Background technology
Because a large amount of existence of non-linear electricity consumption (inductive load and capacitive load), in electric power networks construction, transformation and running, eliminating consequent reactive power and harmonic wave becomes requisite demand.How more effectively compensating power and harmonic carcellation improve the quality of power supply, have become the focus of modern power network operation and management.
In existing reactive power compensation and the harmonic elimination technology, generally all adopt the capacitor of (group) fixed value, though can obtain capacitance not at the same level, but may exist than big-difference between the capacitance that needs because of the capacitance of its acquisition and working control, often incompatible with diversity, randomness and the frequency of variations such as laod network electric current, phase place, harmonic wave, can not realize more accurate control.Because this has also brought specific aim governing system reactive power and harmonic wave difficulty.Such as: when system's construction or transformation, 3 times, 5 times, 7 subharmonic with prediction serve as to administer object, and by this design and and the construction, 9 times, 11 times, 13 times of producing in when operation of system so ... a harmonic wave and a harmonic wave (harmonic wave beyond the integer harmonic wave) all can not obtain administering, and system's construction/improved running status variation is to be difficult to prediction.In the actual motion of modern power systems, the continuous variation of reactive power and harmonic wave is normality often, and the resolution of design is because of the continuous variation of offered load characteristic, and countermeasure at special case tends to change in quality.Countermeasured to bring inflation under control can not in time change along with the drift of harmonic frequency, and the quality of power supply just can not obtain basic improvement.
In other words, when load often changes, adopt prior art not compensate accurately or harmonic elimination,, can not satisfy the actual demand of system because pre-configured capacitor is not complementary with the capacitance value that needs to drop into.
On the other hand, owing to need to adopt a plurality of capacitors to build, when making up each reactive power compensation device, all need to carry out the selection of capacitor group, the structure of circuit is set up a series of activities such as control system, implement more complicated, caused the increase of cost.In addition, because of can't or being difficult for making standard module, be unfavorable for safeguarding fast and install that efficiency of construction is low, particularly pays attention to can not accomplishing that fast quick-recovery can bring bigger loss when the successional occasion of timeliness and electricity consumption breaks down.
Summary of the invention
The object of the invention provides a kind of integral intelligent variable capacitor, can by control system control, provide required capacitance value in setting range, to reach the optimal efficacy of reactive power compensation or harmonic carcellation according to actual needs.
For achieving the above object, the technical solution used in the present invention is: a kind of integral intelligent variable capacitor, comprise housing and be arranged at the interior capacitor group of housing, comprise a plurality of capacitor elementary cells in the described capacitor group, with capacitance value minimum in each capacitor elementary cell is radix, the capacitance value of each capacitor elementary cell is with respect to the multiplying power of radix, the number value with position power in corresponding respectively a kind of numeric coding system obtains controlled and variable output capacitance value by the parallel connection that inserts a certain capacitor elementary cell or a plurality of capacitor elementary cells; Have control system and switching mechanism, described switching mechanism connects the access or the disconnection of each capacitor elementary cell of control, described control system comprises control signal receiving system, encoding scheme generating apparatus, the encoding scheme generating apparatus generates coding according to the control signal that the control signal receiving system receives, the action of control switching mechanism realizes the output of required capacitance.
In the technique scheme,, reach the purpose that electric power system improves the quality of power supply and power grid security fast by the coding and the control method of variable capacitance.The instruction that host computer (automatic or manual) sends required capacitance, after the control signal receiving system receives, by the coding form of encoding scheme generating apparatus, generate corresponding required coding, by the combination switching of switching mechanism controls capacitor elementary cell according to the capacitor elementary cell.
When reality realized, capacitor can be provided with man-machine interface; Switching mechanism can adopt Redundancy Design, realizes the replaceable work of switching element, and the monitoring temperature module is set simultaneously, prevents the mistake fire damage of switching element.Thus, can change in real time according to required capacitance, the capacitance value of feasible incision major loop is followed the variation of electrical network demand fast and is changed, and finishes accurate reactive power compensation or harmonic carcellation.
In the technique scheme, described numeric coding system is meant and can makes up the coded system of expressing each numerical value, can adopt 2 systems, the decimal system, binary-coded decimal, and other special coding forms.Thus, by one group of capacitor that meets the numeric coding requirement, can be combined into each corresponding capacitance according to system.
Optimized technical scheme, described numeric coding system is a binary coding, the capacitance value of each capacitor elementary cell is respectively 2 with respect to the multiplying power of radix
i, wherein i is the integer of 0～n, n 〉=1.The value of n is relevant with electric capacity quantity.
Perhaps, described numeric coding system is the BCD coding, and the capacitance value of each capacitor elementary cell is respectively 2 with respect to the multiplying power of radix
i* 10
j, wherein, i is 0～3 integer, j is the integer of 0～n, n 〉=0.The value of n is relevant with the variable capacitance scope, and those skilled in the art can choose according to designing requirement.
For example, form a variable capacitance composite module by the capacitor elementary cell of n different capacitance values, the capacitance that can export actual demand on request is total to
Individual.
Basic configuration 1kvar, 2kvar, 4kvar, 8kvar be totally 4 capacitor elementary cells, can output capacitance value precision be 1kvar just, and (level is inferior to be the continuously adjustable variable capacitor of 0～15kvar
Because the technique scheme utilization, the present invention compared with prior art has following advantage:
1. employing the present invention can accomplish the adjusting of capacitor arbitrary accuracy and any range, can make the nominal series of products easily and according to the product of special requirement customization special requirement; Capacitor of the present invention can be applied to the control of the power network quality of power supply, also can be applicable to the design of electronic circuits analytical test.
2. capacitor of the present invention is an integral structure, during use, only needs connection host computer and place in circuit to get final product, and does not need otherwise designed to build, and can form standardized product, helps realization of industrialization, reduces the cost of reactive power compensation device.
3. the present invention is for dynamically precisely reactive power compensation, dynamically accurately harmonic elimination provides an effective way.
Description of drawings
Fig. 1 is the circuit block diagram of embodiment one.
Embodiment
Below in conjunction with drawings and Examples the present invention is further described:
Embodiment one: referring to shown in Figure 1, a kind of integral intelligent variable capacitor, comprise housing and be arranged at the interior capacitor group of housing, comprise a plurality of capacitor elementary cells in the described capacitor group, with capacitance value minimum in each capacitor elementary cell is radix, the capacitance value of each capacitor elementary cell is with respect to the multiplying power of radix, the number value with position power in corresponding respectively a kind of numeric coding system obtains controlled and variable output capacitance value by the parallel connection that inserts a certain capacitor elementary cell or a plurality of capacitor elementary cells; Have control system and switching mechanism, described switching mechanism connects the access or the disconnection of each capacitor elementary cell of control, described control system comprises control signal receiving system, encoding scheme generating apparatus, the encoding scheme generating apparatus generates coding according to the control signal that the control signal receiving system receives, the action of control switching mechanism realizes the output of capacitance.
In the present embodiment, switching mechanism is made of control loop and switching device.
Control loop produces signals such as electricity, magnetic, light, sound by control command, the unlatching of driving major loop or close (as the closure/disconnection of relay contact; The on/off of thyristor), control big electric current by Weak current.
Switching device commonly used can adopt latching relay (contact switch) and thyristor (noncontacting switch).
In the present embodiment, encoding scheme itself does not have direct relation with the capacitor volume value.
Encoding scheme that the present invention quotes decision electric capacity combined result as adopting binary-coded decimal, is expressed a metric number (binary-coded decimal code, or claim 8421 yards) with four bits, and 4 binary codes have 2
4=16 kinds of code characters.As shown in the table:
Also can be out of shape and be applied to specific coding: (being definable standby combination in the bracket)
Adopt the basic ideas of BCD coding, four bits have been extended to 12 bits, also can be referred to as a kind of specific coding form.
So-called " specific coding form " do not got rid of and given other suitable encoding schemes that special definition and system can work out, store, discern, call as required.These schemes all can constitute numerical value under certain resolution and the continuous variation in the setting range, thereby can both realize purpose of the present invention, belong to protection scope of the present invention.
Embodiment two: a kind of nominal value is 400kvar, the variable capacitor of degree of regulation 0.1kvar.Adopt the basic structure of embodiment one, wherein, 12 unit of capacitor elementary cell configuration, choose 0.1kvar, 0.2kvar, 0.4kvar, 0.8kvar, 1.6kvar, 3.2kvar, 6.4kvar, 12.8kvar, 25.6kvar, 51.2kvar, 102.4kvar, 204.8kvar, just having constituted adjustable range is that (level is inferior to be the continuously adjustable variable capacitor of 0～409.5kvar
).
In the present embodiment, with capacitance value minimum in each capacitor elementary cell is that 0.1kvar is a radix, the capacitance value of each capacitor elementary cell is with respect to the multiplying power of radix, correspond respectively to the number value in the binary system with position power, being that each multiplying power is respectively 1,2,4,8,16,32,64,128,256,512,1024,2048, is 2 corresponding to the number value in the binary system
0, 2
1, 2
2, 2
3, 2
4, 2
5, 2
6, 2
7, 2
8, 2
9, 2
10, 2
11, 2
12By the mode of shunt capacitor,, can obtain 4096 kinds of capacitance values with these 12 elementary cells.Thereby, can provide required capacitance value at any time according to the instruction of control system.
Claims (3)
1. integral intelligent variable capacitor, comprise housing and be arranged at the interior capacitor group of housing, it is characterized in that: comprise a plurality of capacitor elementary cells in the described capacitor group, with capacitance value minimum in each capacitor elementary cell is radix, the capacitance value of each capacitor elementary cell is with respect to the multiplying power of radix, the number value with position power in corresponding respectively a kind of numeric coding system obtains controlled and variable output capacitance value by the parallel connection that inserts a certain capacitor elementary cell or a plurality of capacitor elementary cells; Have control system and switching mechanism, described switching mechanism connects the access or the disconnection of each capacitor elementary cell of control, described control system comprises control signal receiving system, encoding scheme generating apparatus, the encoding scheme generating apparatus generates coding according to the control signal that the control signal receiving system receives, the action of control switching mechanism realizes the output of required capacitance.
2. integral intelligent variable capacitor according to claim 1 is characterized in that: described numeric coding system is a binary coding, and the capacitance value of each capacitor elementary cell is respectively 2 with respect to the multiplying power of radix
i, wherein i is the integer of 0～n, n 〉=1.
3. integral intelligent variable capacitor according to claim 1 is characterized in that: described numeric coding system is the BCD coding, and the capacitance value of each capacitor elementary cell is respectively 2 with respect to the multiplying power of radix
i* 10
j, wherein, i is 0～3 integer, j is the integer of 0～n, n 〉=0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102841605A CN102013686A (en) | 2010-09-17 | 2010-09-17 | Integrated intelligent variable capacitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102841605A CN102013686A (en) | 2010-09-17 | 2010-09-17 | Integrated intelligent variable capacitor |
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|---|---|
| CN102013686A true CN102013686A (en) | 2011-04-13 |
Family
ID=43843753
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014161459A1 (en) * | 2013-03-30 | 2014-10-09 | Neal George Stewart | Algorithm for passive power factor compensation method with differential capacitor change and reduced line transient noise |
| EP2960912A4 (en) * | 2013-02-22 | 2016-10-19 | Gyrk Internat Technology Co Ltd | Intelligent switch capacitor |
| CN111092431A (en) * | 2019-11-19 | 2020-05-01 | 国网浙江省电力有限公司杭州供电公司 | Intelligent variable capacitor with protection function for power grid |
| CN112649763A (en) * | 2020-12-30 | 2021-04-13 | 四川泛华航空仪表电器有限公司 | High-precision arbitrary value capacitor output device and output method |
Citations (4)
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|---|---|---|---|---|
| CN1281280A (en) * | 1999-07-15 | 2001-01-24 | 裴迪生 | Reactive power compensator of aontactless switch |
| CN101577430A (en) * | 2008-05-08 | 2009-11-11 | 湖北盛佳电器设备有限公司 | Power factor compensating device |
| CN101621203A (en) * | 2008-07-02 | 2010-01-06 | 美国超导体公司 | Static var corrector |
| CN101630846A (en) * | 2009-08-21 | 2010-01-20 | 福州同溢联创电气有限公司 | Low-voltage reactive power compensation switching device |
-
2010
- 2010-09-17 CN CN2010102841605A patent/CN102013686A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1281280A (en) * | 1999-07-15 | 2001-01-24 | 裴迪生 | Reactive power compensator of aontactless switch |
| CN101577430A (en) * | 2008-05-08 | 2009-11-11 | 湖北盛佳电器设备有限公司 | Power factor compensating device |
| CN101621203A (en) * | 2008-07-02 | 2010-01-06 | 美国超导体公司 | Static var corrector |
| CN101630846A (en) * | 2009-08-21 | 2010-01-20 | 福州同溢联创电气有限公司 | Low-voltage reactive power compensation switching device |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2960912A4 (en) * | 2013-02-22 | 2016-10-19 | Gyrk Internat Technology Co Ltd | Intelligent switch capacitor |
| US9874921B2 (en) | 2013-02-22 | 2018-01-23 | Gyrk International Technology Co., Ltd. | Intelligent switch capacitor |
| WO2014161459A1 (en) * | 2013-03-30 | 2014-10-09 | Neal George Stewart | Algorithm for passive power factor compensation method with differential capacitor change and reduced line transient noise |
| CN105409084A (en) * | 2013-03-30 | 2016-03-16 | 逸杰电子有限公司 | Algorithm for passive power factor compensation method with differential compensation change and reduced line transient noise |
| AU2014247475B2 (en) * | 2013-03-30 | 2017-01-05 | Edge Electrons Limited | Algorithm for passive power factor compensation method with differential capacitor change and reduced line transient noise |
| CN105409084B (en) * | 2013-03-30 | 2018-12-04 | 逸节电子有限公司 | Algorithm for the Passive Power factor compensation method with differential compensation variation and the line transient noise of reduction |
| CN111092431A (en) * | 2019-11-19 | 2020-05-01 | 国网浙江省电力有限公司杭州供电公司 | Intelligent variable capacitor with protection function for power grid |
| CN112649763A (en) * | 2020-12-30 | 2021-04-13 | 四川泛华航空仪表电器有限公司 | High-precision arbitrary value capacitor output device and output method |
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Application publication date: 20110413 |