CN103887809A - Energy storage current transformer for energy storage system - Google Patents
Energy storage current transformer for energy storage system Download PDFInfo
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- CN103887809A CN103887809A CN201410137809.9A CN201410137809A CN103887809A CN 103887809 A CN103887809 A CN 103887809A CN 201410137809 A CN201410137809 A CN 201410137809A CN 103887809 A CN103887809 A CN 103887809A
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- contactor
- make contact
- initial charge
- energy storage
- energy
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Abstract
The invention discloses an energy storage current transformer for an energy storage system. The energy storage current transformer comprises an alternating-current power grid which is electrically connected with a power unit. The power unit is connected with a battery module through an initial charging module which comprises a direct-current contactor and an initial charging contactor. The power unit and the battery module are connected in series with the direct-current contactor, and the initial charging contactor is connected in parallel to the direct-current contactor. Cost is low, cost can be saved by at least 90%, a production function is complete, charging speed is high, a power preset value can be large or small, the power preset value is completely determined according to needs, and theoretically the power preset value can reach the rated charging power of a battery system.
Description
Technical field
The invention belongs to current transformer technical field, relate in particular to a kind of energy accumulation current converter that is applied to energy-storage system.
Background technology
In recent years, the New Energy Industry of China had especially been obtained unprecedented development at wind power generation and field of solar energy.But because new forms of energy are subject to geographical distribution, seasonal variations, the restriction of the factor such as day alternates with night, impacts its quality of power supply and safe and stable operation to electrical network, and the quality of power supply and stored energy have become one of perspective key technology of electrical network.For current energy storage device, take battery as example, monomer capacity is less, need form large capacity energy-accumulating power station by many groups of series-parallel modes.But this series-parallel energy storage mode, exists all pressing and the problem of current-sharing between parts, if all press and the problem of current-sharing on process not ideal enough, can cause that the direct damage of battery or battery individual life span descend rapidly degradation problem.
Traditional battery initial charge generally can be used copped wave or step transformer to carry out the initial charge to battery, and cost is high, and control system complexity, is prone to problem; Traditional battery initial charge is limited to Principle Problems, and initial charge speed is slow, can not meet battery charging demand.
Summary of the invention
The deficiency existing for prior art, technical problem to be solved by this invention is to provide one to be applied to energy-storage system (being mainly energy-storage battery), the energy accumulation current converter that is applied to energy-storage system that exhausted cell system is carried out to initial charge operation.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of energy accumulation current converter that is applied to energy-storage system, comprise AC network, in described AC network, be electrically connected with power cell, described power cell is connected with battery module by initial charge module, described initial charge module is made up of direct contactor and initial charge contactor, and power cell and battery module are connected with D.C. contactor, and described initial charge contactor is in parallel with D.C. contactor.
The above-mentioned energy accumulation current converter that is applied to energy-storage system, described D.C. contactor is made up of the first make contact, the second make contact and the 3rd make contact, described initial charge contactor comprises the 4th make contact, the 5th make contact and the 6th make contact, described the 4th make contact is in parallel with the 3rd make contact by initial charge current-limiting resistance, and the 6th make contact is in parallel with the first make contact.
The above-mentioned energy accumulation current converter that is applied to energy-storage system, described D.C. contactor is connected with power cell and battery module respectively by the first make contact and the 3rd make contact.
The advantage that the present invention is applied to the energy accumulation current converter of energy-storage system is:
1, realize cost lower.The energy accumulation current converter initial charge function of department's design relies on the metering function of current-limiting resistance, first battery is carried out to little current/voltage and promote charging, then detecting that cell voltage rises to after certain voltage, automatically battery is carried out the charging operations of user's setting power value, the existing cost compare of historical facts or anecdotes is low, can cost-saving 90% even more;
2, defencive function is perfect.The energy accumulation current converter initial charge that I take charge of design has a series of safeguard measures that detection battery failures, overvoltage fault, excess temperature fault, over current fault, short trouble, electric network fault, contactor fault etc. relate to energy-storage battery system, and defencive function is powerful.
3, charging rate is fast.And the energy accumulation current converter initial charge function that I take charge of design is detecting that after system normal operation, automatically switching to the performance number that user sets voluntarily carries out the charging of constant power type, this power preset value is changeable, depending on demand, can reach in theory the specified charge power of battery system completely.
Accompanying drawing explanation
Fig. 1 is circuit structure schematic diagram of the present invention.
Embodiment
Below in conjunction with drawings and the specific embodiments, the present invention is described in further details;
As shown in Figure 1, a kind of energy accumulation current converter that is applied to energy-storage system, comprise AC network 1, in described AC network 1, be electrically connected with power cell 2, described power cell 2 is connected with battery module 4 by initial charge module 3, described initial charge module 3 is made up of direct contactor 5 and initial charge contactor 6, and power cell 2 and battery module 4 are connected with D.C. contactor 5, and described initial charge contactor 6 is in parallel with D.C. contactor 5.D.C. contactor 5 is made up of the first make contact 7, the second make contact 8 and the 3rd make contact 9, described initial charge contactor 6 comprises the 4th make contact 10, the 5th make contact 11 and the 6th make contact 12, described the 4th make contact 10 is in parallel with the 3rd make contact 9 by initial charge current-limiting resistance 13, and the 6th make contact 12 is in parallel with the first make contact 7.D.C. contactor 5 is connected with power cell 2 and battery module 4 respectively by the first make contact 7 and the 3rd make contact 9.
Front stage circuits is AC/DC great power bidirectional current transformer, and late-class circuit is large power energy storage battery module;
Hardware system comprises that D.C. contactor, initial charge contactor, initial charge current-limiting resistance and control system thereof are as auxiliary relay, DSP control chip, control power supply etc.
Software forms
Initial charge enable logic control software, is used for controlling D.C. contactor, initial charge contactor;
Initial charge core algorithm control software, is used for battery to carry out the charging of user's setting power value.
Certainly, above-mentioned explanation is not limitation of the present invention, and the present invention is also not limited to above-mentioned giving an example; those skilled in the art; in essential scope of the present invention, variation, remodeling, interpolation or the replacement made, all should belong to protection scope of the present invention.
Claims (3)
1. one kind is applied to the energy accumulation current converter of energy-storage system, comprise AC network, it is characterized in that: in described AC network, be electrically connected with power cell, described power cell is connected with battery module by initial charge module, described initial charge module is made up of direct contactor and initial charge contactor, power cell and battery module are connected with D.C. contactor, and described initial charge contactor is in parallel with D.C. contactor.
2. the energy accumulation current converter that is applied to energy-storage system according to claim 1, it is characterized in that: described D.C. contactor is made up of the first make contact, the second make contact and the 3rd make contact, described initial charge contactor comprises the 4th make contact, the 5th make contact and the 6th make contact, described the 4th make contact is in parallel with the 3rd make contact by initial charge current-limiting resistance, and the 6th make contact is in parallel with the first make contact.
3. the energy accumulation current converter that is applied to energy-storage system according to claim 2, is characterized in that: described D.C. contactor is connected with power cell and battery module respectively by the first make contact and the 3rd make contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410137809.9A CN103887809A (en) | 2014-04-08 | 2014-04-08 | Energy storage current transformer for energy storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410137809.9A CN103887809A (en) | 2014-04-08 | 2014-04-08 | Energy storage current transformer for energy storage system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103887809A true CN103887809A (en) | 2014-06-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410137809.9A Pending CN103887809A (en) | 2014-04-08 | 2014-04-08 | Energy storage current transformer for energy storage system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107819348A (en) * | 2017-11-30 | 2018-03-20 | 惠州市蓝微新源技术有限公司 | The contactor control system and its control method of a kind of energy-accumulating power station |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202424196U (en) * | 2011-12-28 | 2012-09-05 | 北京四方继保自动化股份有限公司 | Large-capacity energy storage converter formed by connecting multiple groups of inverter units in parallel |
| CN202444289U (en) * | 2012-02-17 | 2012-09-19 | 浙江省电力试验研究院 | Energy storage converter |
| CN203522297U (en) * | 2013-09-29 | 2014-04-02 | 沈阳融华新能源电气有限公司 | Initial charging device of energy storage system cell |
| CN104753154A (en) * | 2013-09-29 | 2015-07-01 | 沈阳融华新能源电气有限公司 | Initial charging device and method of energy storage system battery |
-
2014
- 2014-04-08 CN CN201410137809.9A patent/CN103887809A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202424196U (en) * | 2011-12-28 | 2012-09-05 | 北京四方继保自动化股份有限公司 | Large-capacity energy storage converter formed by connecting multiple groups of inverter units in parallel |
| CN202444289U (en) * | 2012-02-17 | 2012-09-19 | 浙江省电力试验研究院 | Energy storage converter |
| CN203522297U (en) * | 2013-09-29 | 2014-04-02 | 沈阳融华新能源电气有限公司 | Initial charging device of energy storage system cell |
| CN104753154A (en) * | 2013-09-29 | 2015-07-01 | 沈阳融华新能源电气有限公司 | Initial charging device and method of energy storage system battery |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107819348A (en) * | 2017-11-30 | 2018-03-20 | 惠州市蓝微新源技术有限公司 | The contactor control system and its control method of a kind of energy-accumulating power station |
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Application publication date: 20140625 |
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