CN102522228A - Voltage Support Capacitor Module - Google Patents
Voltage Support Capacitor Module Download PDFInfo
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- CN102522228A CN102522228A CN2011104447538A CN201110444753A CN102522228A CN 102522228 A CN102522228 A CN 102522228A CN 2011104447538 A CN2011104447538 A CN 2011104447538A CN 201110444753 A CN201110444753 A CN 201110444753A CN 102522228 A CN102522228 A CN 102522228A
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- 239000003990 capacitor Substances 0.000 title claims abstract description 122
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 38
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000004411 aluminium Substances 0.000 claims description 36
- 239000010409 thin film Substances 0.000 abstract description 7
- 239000010408 film Substances 0.000 description 23
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- Inverter Devices (AREA)
Abstract
A voltage support capacitor module for voltage supporting a dc voltage, comprising: a first movable capacitor unit having one end connected to the positive electrode and the other end connected to ground; a second movable capacitor unit having one end connected to ground and the other end connected to a negative electrode; a first fixed capacitor unit having one end connected to the positive electrode and the other end connected to ground; and a second fixed capacitor unit having one end connected to a ground and the other end connected to a negative electrode, wherein each of the first and second movable capacitor units includes K series-connected aluminum electrolytic capacitor groups each including L aluminum electrolytic capacitors and one resistor connected in parallel, each of the first and second fixed capacitor units includes M series-connected thin film capacitor groups each including N thin film capacitors and one resistor connected in parallel, wherein K, L, M and N are integers of not less than 1.
Description
Technical field
The present invention relates to a kind of voltage and support capacitance module, more particularly, relate to a kind of direct voltage and carry out the voltage support capacitance module that voltage supports wind electric converter with aluminium electrolytic capacitor and film capacitor mixing use.
Background technology
Along with the pay attention to day by day of country to wind energy development, wind power generation has obtained developing rapidly, and installed capacity increases day by day, and the problem in useful life of wind-driven generator also more and more receives publicity.The current transformer of wind-driven generator is the core of power conversion control, and in its hardcore IGBT power model, being used for direct current that the direct voltage to wind-driven generator output (through over commutation) supports, to support capacitor be one of critical piece that influences useful life.
The wind electric converter dc bus need adopt voltage to support electric capacity (below, abbreviate as and support electric capacity) to carry out energy storage, voltage support etc., to satisfy the operate as normal functional requirement of current transformer.The voltage here supports to refer to and suppresses ripple voltage and direct voltage is remained on to a certain degree.Usually, direct current supports electric capacity and can select alminium electrolytic condenser or metal film electric capacity for use.
General aluminium electrolytic capacitor is 500-600V because of the highest nominal magnitude of voltage of its materials limitations, and therefore high withstand voltage in order to obtain, aluminium electrolytic capacitor needs series connection.But because aluminium electrolytic capacitor initial charge and leakage current diversity ratio are bigger, then must special all pressures of considering electric capacity when its series connection is used, otherwise capacitor is blasted or accident such as leakage easily.In addition, in order to prevent the series capacitors overvoltage, need leave more voltage margin.Each capacitor of while series arm need add grading resistor all presses, but grading resistor is many, exists the damage risk, has increased the unreliability of system.
On the other hand, again need be in order to obtain high capacitance with the capacitor parallel connection, still the electric capacity quantity of parallel connection is many more, and equalizer circuit is also just many more, and the leakage current of electric capacity and appearance value matched uniform property are good more.But, and joint conference causes the busbar design that whole alminium electrolytic condenser group volume is big and needs are complicated.In addition, the aluminium electrolytic capacitor module of parallelly connected back series connection as shown in Figure 1 also has following shortcoming: 1) life-span weak point, and the general life-span is to work 5 years under the normal temperature; 2) be not easy to store, general normal temperature stores 2-3 down just needs electric capacity to activate, and can reduce with the appearance value otherwise electric capacity is withstand voltage, and leakage current can increase.
Film capacitor has following advantage: bear high effective value electric current power (can reach 1A/uF), can bear the overvoltage that doubles rated voltage, can bear reverse voltage, bear high peak current, long service life (can reach 10-20), can store for a long time etc.But,, thereby cause it can't make big capacity because the dielectric loss of film capacitor is little.Fig. 2 is the diagrammatic sketch of the support capacitance module of based thin film capacitor in the prior art.
Therefore, can prolong useful life, the minimizing electric capacity quantity that supports capacitance module, the support capacitance module that reduces the utilance of module volume and raising capacitor in order to solve the above-mentioned deficiency that exists in the prior art, need to provide.
Summary of the invention
In order to solve the problems referred to above that exist in the prior art, the invention provides a kind of support capacitance module that uses aluminium electrolytic capacitor and film capacitor that mixes.
A kind of being used for carried out the voltage support capacitance module that voltage supports to direct voltage; Comprise: the flexible lamp container module; Comprise the first flexible lamp container unit and the second flexible lamp container unit, wherein, the positive pole and the other end that an end of the first flexible lamp container unit is connected to said direct voltage are connected to ground connection; One end of the second flexible lamp container unit is connected to ground connection, and the other end is connected to the negative pole of said direct voltage; The fixed capacitor module; Comprise the first fixed capacitor unit and the second fixed capacitor unit; Wherein, the positive pole and the other end that an end of the first fixed capacitor unit is connected to said direct voltage are connected to ground connection, and an end of the second fixed capacitor unit is connected to ground connection; The other end is connected to the negative pole of said direct voltage; Wherein, each in the first flexible lamp container unit and the second flexible lamp container unit comprises K aluminium electrolytic capacitor group that is connected in series, and each electrolytic capacitor group comprises L aluminium electrolytic capacitor and resistor that is connected in parallel; In the first fixed capacitor unit and the second fixed capacitor unit each comprises M film capacitor group that is connected in series; Each film capacitor group comprises N film capacitor and resistor that is connected in parallel, and wherein, K, L, M and N are not less than 1 integer.
Said direct voltage is the direct voltage behind over commutation to wind-driven generator output.
The rated voltage that supports capacitance module when said voltage is 1200V, and when rated current was 150A, aluminium electrolytic capacitor was the aluminium electrolytic capacitor of 400V/6800uf; Film capacitor is the film capacitor of 1200V/128uf, and K equals 2, and L equals 1; M equals 1, and N equals 2.
As the rated voltage 1150V of said voltage support capacitance module, when rated current was 300A, aluminium electrolytic capacitor was the aluminium electrolytic capacitor of 400V/6800uf; Film capacitor is the film capacitor of 1200V/220uf, and K equals 2, and L equals 1; M equals 1, and N equals 6.
Said wind-driven generator is the 1.5MW wind-driven generator.
Said flexible lamp container module is releasably attached to said voltage and supports capacitance module.
Support capacitance module provided by the invention not only can prolong useful life of supporting capacitance module, reduces electric capacity quantity, reduce the module volume, and can improve the utilance of capacitor.
Description of drawings
Through the description of embodiment being carried out below in conjunction with accompanying drawing, these and/or other aspect of the present invention and advantage will become clear and be easier to and understand, wherein:
Fig. 1 is the diagrammatic sketch based on the support capacitance module of aluminium electrolytic capacitor according to prior art;
Fig. 2 is the diagrammatic sketch according to the support capacitance module of the based thin film capacitor of prior art;
Fig. 3 is the diagrammatic sketch according to the support capacitance module of exemplary embodiment of the present invention.
Embodiment
Now the embodiment of the invention is carried out detailed description, its example shown in the accompanying drawings, wherein, identical label is represented same parts all the time.
Support capacitance module to 1.5MW wind-driven generator current transformer; Technical scheme of the present invention is applied to the mixing type of attachment of alminium electrolytic condenser and thin-film capacitor the wind-powered electricity generation converter system (for example 1.5MW wind-driven generator current transformer) of dc bus neutral earthing; Wherein be composed in series the flexible lamp container module by four alminium electrolytic condensers; Form the fixed capacitor module by four thin-film capacitors two and two strings; The flexible lamp container module is mainly used in filtering and voltage supports, and the fixed capacitor module is mainly used in the support ripple current.The flexible lamp container module removably is attached to said support capacitance module, therefore is convenient to the flexible lamp container module is changed.
Below, in conjunction with Fig. 3 the support capacitance module according to exemplary embodiment of the present invention is described, wherein, Fig. 3 is the diagrammatic sketch according to the support capacitance module of exemplary embodiment of the present invention.
As shown in Figure 3, comprise flexible lamp container module according to the support capacitance module 100 of exemplary embodiment of the present invention and have the fixed capacitor module of film capacitor with aluminium electrolytic capacitor.Specifically, supporting capacitance module comprises the flexible lamp container module with the first flexible lamp container unit 110 and second flexible lamp container unit 120 and has the first fixed capacitor unit 130 and the fixed capacitor module of the second fixed capacitor unit 140.
One end of the first flexible lamp container unit 110 is connected to the positive pole (below, be called for short anodal) of direct voltage, and the other end is connected to ground connection.One end of the second flexible lamp container unit 120 is connected to ground connection, and the other end is connected to the negative pole (below, be called for short negative pole) of direct voltage.One end of the first fixed capacitor unit 130 is connected to positive pole, and the other end is connected to ground connection.One end of the second fixed capacitor unit 140 is connected to ground connection, and the other end is connected to negative pole.
The first flexible lamp container unit 110 and the second flexible lamp container unit 120 are with ground connection node symmetry; Promptly; In the first flexible lamp container unit 110 and the second flexible lamp container unit 120 each comprises K aluminium electrolytic capacitor group that is connected in series; And each electrolytic capacitor group comprises L aluminium electrolytic capacitor and resistor that is connected in parallel, and K and L are not less than 1 integer here.In Fig. 3, K is 2, and L is 1.
Similarly; The first fixed capacitor unit 130 and the second fixed capacitor unit 140 are with ground connection node symmetry; Promptly; In the first fixed capacitor unit 130 and the second fixed capacitor unit 140 each comprises the film capacitor group that M is connected in series, and each film capacitor group comprises N film capacitor and resistor that is connected in parallel, and M and N are not less than 1 positive integer here.In Fig. 3, M is 1, and N is 2.
For the situation that needs rated voltage 1150V/ rated current 150A, the electric capacity that needs does
Wherein, U
RippleBe the ripple voltage that allows, I
RmsBe the effective current under the 2KHz.
Under the 2KHz frequency, the capacitor C that needs is about 6800uf, and considers the I of every uf of aluminium electrolytic capacitor
RmsBe 22mA/uf.If when all using aluminium electrolytic capacitor,, form one group and connect 4 this group and form capacitance module (as shown in Figure 1) through 4 parallel connections for the aluminium electrolytic capacitor of 16 400V/6800uf.
If use hybrid plan according to aluminium electrolytic capacitor of the present invention and film capacitor; And when using the aluminium electrolytic capacitor of 400V/6800uf; In order to support 1150V and to consider enough remainings; To use 4 aluminium electrolytic capacitors (as shown in Figure 3), the effective current that then flows through aluminium electrolytic capacitor is:
And for film capacitor, I
Film=150-I
Electrolysis=113 (A)=C * 0.22A/uf.
The total capacity that can release the fixed capacitor unit according to above-mentioned formula is 514uf, and the capacitor of 514uf can be formed through the 2 groups of capacitance group that formed by 2 film capacitor parallel connections of connecting by the film capacitor of 1200V/128uf.
In addition, for the situation of rated voltage 1150V/300A,,, need carry out one group of 8 parallel connection formation and connect 4 this group forming capacitance module then for the aluminium electrolytic capacitor of 32 400V/6800uf if all use alminium electrolytic condenser.When using according to hybrid plan of the present invention, need 4 400V/6800uf aluminium electrolytic capacitors of series connection, need promptly, need 16 capacitors altogether with 12 film capacitors of one group of 6 formation of parallel connection and 2 this group of forms of connecting.
Therefore, than the situation of whole use aluminium electrolytic capacitors, alminium electrolytic condenser and thin-film capacitor are mixed the quantity that situation about using can reduce capacitor, thereby reduce volume.
For the useful life of supporting capacitance module and since the useful life (generally being 20 years) that is generally film capacitor useful life (generally being 4-5) of aluminium electrolytic capacitor 1/5 to 1/4.Therefore, than aforesaid useful life be the support capacitance module of whole use aluminium electrolytic capacitors of 4-5.Because the movable capacitance module that can constitute through the dismountable aluminium electrolytic capacitor of periodic replacement,, therefore prolonged the useful life of whole support capacitance module according to useful life of support capacitance module of the present invention reaching 20 years.
According to support capacitance module of the present invention,, therefore be convenient to supporting the maintenance of capacitance module because the movable capacitance module that is made up of the aluminium electrolytic capacitor that hangs down the life-span is removably to be attached to the support capacitance module.
Though represented and described some embodiments of the present invention, it should be appreciated by those skilled in the art that under the situation that does not break away from the principle of the present invention that limits its scope claim and equivalent thereof and spirit, can make amendment to these embodiment.
Claims (6)
1. one kind is used for direct voltage is carried out the voltage support capacitance module that voltage supports, and it is characterized in that, comprising:
The flexible lamp container module; Comprise the first flexible lamp container unit and the second flexible lamp container unit; Wherein, The positive pole and the other end that one end of the first flexible lamp container unit is connected to said direct voltage are connected to ground connection, and an end of the second flexible lamp container unit is connected to ground connection, and the other end is connected to the negative pole of said direct voltage;
The fixed capacitor module; Comprise the first fixed capacitor unit and the second fixed capacitor unit; Wherein, the positive pole and the other end that an end of the first fixed capacitor unit is connected to said direct voltage are connected to ground connection, and an end of the second fixed capacitor unit is connected to ground connection; The other end is connected to the negative pole of said direct voltage
Wherein, each in the first flexible lamp container unit and the second flexible lamp container unit comprises K aluminium electrolytic capacitor group that is connected in series, and each electrolytic capacitor group comprises L aluminium electrolytic capacitor and resistor that is connected in parallel,
In the first fixed capacitor unit and the second fixed capacitor unit each comprises M film capacitor group that is connected in series, and each film capacitor group comprises N film capacitor and resistor that is connected in parallel,
Wherein, K, L, M and N are not less than 1 integer.
2. voltage according to claim 1 supports capacitance module, it is characterized in that, said direct voltage is the direct voltage behind over commutation to wind-driven generator output.
3. voltage according to claim 2 supports capacitance module, it is characterized in that, the rated voltage that supports capacitance module when said voltage is 1200V, when rated current is 150A,
Aluminium electrolytic capacitor is the aluminium electrolytic capacitor of 400V/6800uf, and film capacitor is the film capacitor of 1200V/128uf, and K equals 2, and L equals 1, and M equals 1, and N equals 2.
4. voltage according to claim 2 supports capacitance module, it is characterized in that, and as the rated voltage 1150V of said voltage support capacitance module, when rated current is 300A,
Aluminium electrolytic capacitor is the aluminium electrolytic capacitor of 400V/6800uf, and film capacitor is the film capacitor of 1200V/220uf, and K equals 2, and L equals 1, and M equals 1, and N equals 6.
5. support capacitance module according to any described voltage among the claim 2-4, it is characterized in that said wind-driven generator is the 1.5MW wind-driven generator.
6. voltage according to claim 1 supports capacitance module, it is characterized in that, said flexible lamp container module is releasably attached to said voltage and supports capacitance module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110444753.8A CN102522228B (en) | 2011-12-27 | 2011-12-27 | Voltage Support Capacitor Module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110444753.8A CN102522228B (en) | 2011-12-27 | 2011-12-27 | Voltage Support Capacitor Module |
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| Publication Number | Publication Date |
|---|---|
| CN102522228A true CN102522228A (en) | 2012-06-27 |
| CN102522228B CN102522228B (en) | 2014-02-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110444753.8A Active CN102522228B (en) | 2011-12-27 | 2011-12-27 | Voltage Support Capacitor Module |
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| Country | Link |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103474239A (en) * | 2013-09-06 | 2013-12-25 | 安徽赛福电子有限公司 | High voltage direct current capacitor with equipotential connection function |
| CN107464695A (en) * | 2017-09-18 | 2017-12-12 | 佛山市高捷工业炉有限公司 | A kind of resonant capacitance group of sensing heating |
| CN107946081A (en) * | 2017-11-16 | 2018-04-20 | 深圳市容信科技有限公司 | Aluminium electrolutic capacitor and thin film capacitor compound module in parallel |
| CN112490003A (en) * | 2020-12-04 | 2021-03-12 | 中车永济电机有限公司 | Simplified support capacitor assembly suitable for electric locomotive converter |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030209064A1 (en) * | 2002-05-10 | 2003-11-13 | Adamson John David | System for generating electric power from a rotating tire's mechanical energy using reinforced piezoelectric materials |
| CN101404445A (en) * | 2008-11-12 | 2009-04-08 | 中国北车股份有限公司大连电力牵引研发中心 | Current transformer power module main body apparatus and its processing method |
| CN201750356U (en) * | 2010-06-18 | 2011-02-16 | 特变电工新疆新能源股份有限公司 | Mounting cabinet for photovoltaic inverter |
-
2011
- 2011-12-27 CN CN201110444753.8A patent/CN102522228B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030209064A1 (en) * | 2002-05-10 | 2003-11-13 | Adamson John David | System for generating electric power from a rotating tire's mechanical energy using reinforced piezoelectric materials |
| CN101404445A (en) * | 2008-11-12 | 2009-04-08 | 中国北车股份有限公司大连电力牵引研发中心 | Current transformer power module main body apparatus and its processing method |
| CN201750356U (en) * | 2010-06-18 | 2011-02-16 | 特变电工新疆新能源股份有限公司 | Mounting cabinet for photovoltaic inverter |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103474239A (en) * | 2013-09-06 | 2013-12-25 | 安徽赛福电子有限公司 | High voltage direct current capacitor with equipotential connection function |
| CN107464695A (en) * | 2017-09-18 | 2017-12-12 | 佛山市高捷工业炉有限公司 | A kind of resonant capacitance group of sensing heating |
| CN107946081A (en) * | 2017-11-16 | 2018-04-20 | 深圳市容信科技有限公司 | Aluminium electrolutic capacitor and thin film capacitor compound module in parallel |
| CN107946081B (en) * | 2017-11-16 | 2019-09-10 | 深圳市容信科技有限公司 | Aluminium electrolutic capacitor and thin film capacitor parallel connection compound die group |
| CN112490003A (en) * | 2020-12-04 | 2021-03-12 | 中车永济电机有限公司 | Simplified support capacitor assembly suitable for electric locomotive converter |
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| Publication number | Publication date |
|---|---|
| CN102522228B (en) | 2014-02-05 |
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