CN206412778U - A kind of energy accumulation current converter and energy storage converter system - Google Patents
A kind of energy accumulation current converter and energy storage converter system Download PDFInfo
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- CN206412778U CN206412778U CN201621404770.3U CN201621404770U CN206412778U CN 206412778 U CN206412778 U CN 206412778U CN 201621404770 U CN201621404770 U CN 201621404770U CN 206412778 U CN206412778 U CN 206412778U
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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
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Abstract
The utility model discloses a kind of energy accumulation current converter and energy storage converter system.The energy accumulation current converter includes energy storage end, power network end, the two way convertor being connected between energy storage end and power network end and the controller being connected with two way convertor, energy accumulation current converter also includes the DC side filter circuit for filtering out two frequency multiplication ripples in DC current, and the DC side filter circuit is connected between energy storage end and two way convertor.The utility model is capable of the secondary pulsation of DC side electric current effectively processed, improves the cycle life of energy storage device by adding the DC side filter circuits of the two frequency multiplication ripples that can be filtered out in DC current in the DC side of energy accumulation current converter.
Description
Technical field
The utility model is related to micro-capacitance sensor power converter technical field, more particularly to a kind of energy accumulation current converter and energy storage unsteady flow
System.
Background technology
The area that the photovoltaics such as NORTHWEST CHINA portion and wind-powered electricity generation enrich is occurred in that abandons light and wind-abandoning phenomenon on a large scale, its important original
Therefore one is exactly the unstable caused grid-connected difficulty of the output of photovoltaic generation and wind-power electricity generation.At present, the solution of main flow is
For these photovoltaic plants or the energy-storage system of the supporting certain capacity of wind power plant, playing one improves the quality of power supply and " cistern "
Cushioning effect, and the peak load shifting of bulk power grid is acted on, can also off-network fortune because energy-storage system can be incorporated into the power networks
OK, the power supply reliability and security of regional power grid are effectively improved.
Energy-storage system is mainly made up of energy storage device, energy accumulation current converter and grid-connected switch etc., wherein, energy accumulation current converter is storage
The conversion of energy system capacity and the core of transmission, realize energy storage device direct current to the conversion of power network alternating current, and energy storage device
The transmitted in both directions of energy between power network.
At present, there is serious secondary pulsation problem in energy accumulation current converter DC side electric current, have a strong impact on energy storage device
Cycle life.
Utility model content
The utility model provides a kind of energy accumulation current converter and energy storage converter system, to solve the straight of existing energy accumulation current converter
Flow the problem of side electric current has serious secondary pulsation.
To reach above-mentioned purpose, what the technical solution of the utility model was realized in：
On the one hand, the utility model provides a kind of energy accumulation current converter, including energy storage end, power network end, is connected to energy storage end
Two way convertor between power network end and the controller being connected with two way convertor, it is characterised in that the energy storage unsteady flow
Device also includes the DC side filter circuit for filtering out two frequency multiplication ripples in DC current, and the DC side filter circuit is connected to storage
Can be between end and two way convertor.
Preferably, DC side filter circuit is LC resonance circuits, and the resonant frequency of LC resonance circuits is electric for twice of power network
Voltage-frequency rate.
Preferably, DC side filter circuit also includes the electrochemical capacitor for filtering out higher hamonic wave in DC current, the electrolysis
Electric capacity is in parallel with LC resonance circuits.
Preferably, energy accumulation current converter also includes the AC filter circuit for filtering out alternating current medium-high frequency harmonic wave, AC
Filter circuit is connected between two way convertor and power network end.
Preferably, AC filter circuit is LC types filter circuit or is LCL type filter circuit.
Preferably, energy accumulation current converter also includes：Direct current pre-charge circuit with exchange pre-charge circuit, direct current pre-charge circuit
It is connected between energy storage end and DC side filter circuit, exchange pre-charge circuit is connected to AC filter circuit and energy storage unsteady flow
Between the power network end of device.
Preferably, direct current pre-charge circuit includes multiple first current-limiting resistances, and the number of the first current-limiting resistance is according to access
Voltage class to energy storage end is determined；Exchanging pre-charge circuit includes multiple second current-limiting resistances, the number of the second current-limiting resistance
Voltage magnitude according to power network end is linked into is determined.
On the other hand, the utility model provides a kind of energy storage converter system, including energy storage device, power network and above-mentioned energy storage
Current transformer, energy accumulation current converter is connected between energy storage device and power network, for being charged for energy storage device or being that power network is powered.
Preferably, energy storage device is plumbic acid/lead carbon battery, lithium ion battery, super capacitor or flying wheel battery, the power network
The ac bus being connected for bulk power grid or photovoltaic plant or wind power plant or with power network.
Preferably, power network is single phase ac power network.
The beneficial effect of the utility model embodiment is：The utility model can by the DC side addition in energy accumulation current converter
The DC side filter circuit of two frequency multiplication ripples in DC current is filtered out, is capable of the secondary pulsation of DC side electric current effectively processed, carries
The cycle life of high energy storage device.
Brief description of the drawings
A kind of structured flowchart for energy accumulation current converter that Fig. 1 provides for the utility model embodiment；
The structure chart for the energy accumulation current converter that Fig. 2 provides for the utility model embodiment；
A kind of structured flowchart for energy storage converter system that Fig. 3 provides for the utility model embodiment.
Embodiment
It is new to this practicality below in conjunction with accompanying drawing to make the purpose of this utility model, technical scheme and advantage clearer
Type embodiment is described in further detail.
The structured flowchart for a kind of energy accumulation current converter that Fig. 1 provides for the utility model embodiment, as shown in figure 1, the energy storage
Current transformer 100, including energy storage end 1, power network end 2, the two way convertor 3 that is connected between energy storage end 1 and power network end 2 and with it is double
The controller 4 connected to current transformer；Wherein, energy accumulation current converter 100 also includes filtering out the straight of two frequency multiplication ripples in DC current
Side filter circuit 5 is flowed, the DC side filter circuit 5 is connected between energy storage end 1 and two way convertor 3.
The present embodiment in the DC side of energy accumulation current converter by adding the straight of the two frequency multiplication ripples that can be filtered out in DC current
Side filter circuit is flowed, is capable of the secondary pulsation of DC side electric current effectively processed, the cycle life of energy storage device is improved.
In an implementation of the present embodiment, DC side filter circuit 5 be LC resonance circuits, LC resonance circuits it is humorous
Vibration frequency is twice of line voltage frequency, suppresses the secondary pulsation of DC side electric current by the LC resonance circuits.
The higher hamonic wave in DC current in order to absorb energy accumulation current converter DC side, in the implementation of the present embodiment
In, DC side filter circuit also includes the electrochemical capacitor for filtering out higher hamonic wave in DC current, the electrochemical capacitor and LC resonance electricity
Road is in parallel.
The higher hamonic wave in alternating current in order to filter out energy accumulation current converter AC, in the present embodiment, shown in Fig. 1
Energy accumulation current converter 100 also includes the AC filter circuit for filtering out alternating current medium-high frequency harmonic wave, and the AC filter circuit connects
It is connected between two way convertor 3 and power network end 2；It is pointed out that in order to hop controller, AC filter circuit can be with
It is connected with controller, in order to which controller gathers the electric signal at AC filter circuit interdependent node.Wherein, AC is filtered
Circuit includes but is not limited to LC types filter circuit, LCL type filter circuit.
In order to charge and be pre-charged for the energy storage device in power shortage state to DC side filter capacitor, in the present embodiment
In, the energy accumulation current converter 100 shown in Fig. 1 also includes direct current pre-charge circuit, and the direct current pre-charge circuit is connected to the He of energy storage end 1
Between DC side filter circuit 5；And in order to carry out current limliting to the electric capacity in AC filter circuit and DC side filter circuit
Charging, prevents the excessive damage device of capacitance charging current, and the energy accumulation current converter 100 shown in Fig. 1 also includes exchange pre-charge circuit,
The exchange pre-charge circuit is connected between AC filter circuit and the power network end of energy accumulation current converter.
Exemplarily, direct current pre-charge circuit includes multiple first current-limiting resistances, and the number of the first current-limiting resistance is according to connecing
Enter the voltage class determination to energy storage end, it is different according to the voltage class of energy storage device, and the current-limiting resistance of switching varying number,
The access of wide-voltage range is realized, without the situation of excessively stream；Exchanging pre-charge circuit includes multiple second current-limiting resistances,
The number of second current-limiting resistance determines that according to the voltage magnitude of power network, and switching is different according to the voltage magnitude for being linked into power network end
The current-limiting resistance of quantity, is not in the situation of excessively stream so as to realize the access of wide-voltage range, protection electric capacity and internal power
Device.
To describe energy accumulation current converter of the present utility model in detail, the utility model is said by following specific embodiments
It is bright.
In this specific embodiment, energy accumulation current converter includes energy storage end 1, power network end 2, and is sequentially connected with energy storage end 1
Direct current pre-charge circuit 7, DC side filter circuit 5, two way convertor 3, AC filter circuit 6, friendship between power network end 2
Flow pre-charge circuit 8；Wherein, the connection of energy storage end 1 energy storage device, power network end connection AC network.
With reference to Fig. 2, direct current pre-charge circuit 7 is connected between energy storage end 1 and DC side filter circuit 5, can be achieved to straight
Flow the charging of side filter capacitor and during in power shortage state energy storage device precharge；
DC side filter circuit 5 is connected between direct current pre-charge circuit 7 and two way convertor 3, is filtered out in DC current
Higher hamonic wave, and filter out two frequency multiplication ripples in DC current, DC side filter circuit can be by electrochemical capacitor C1 and string
The LC resonance circuits parallel connection of connection is formed, and the resonant frequency of the LC resonance circuits is twice of line voltage frequency, utilizes the LC resonance
Circuit can suppress the secondary pulsation of DC side electric current, improve the cycle life of energy storage device；
Two way convertor 3 is connected between DC side filter circuit 5 and AC filter circuit 6, and energy storage device can be achieved
Direct current to the electric energy conversion between AC network alternating current, and the two-way biography of energy between energy storage device and AC network
It is defeated, i.e., energy storage device charging is powered or given to AC network；
AC filter circuit 6 is connected between two way convertor 3 and exchange pre-charge circuit 8, can be filtered out by two-way change
Flow the high frequency electric harmonic wave in the alternating current that device 3 is exported；
Exchange pre-charge circuit 8 is connected between AC filter circuit 6 and power network end 2, and effect is to filter to AC
Filter capacitor in wave circuit 6 and DC side filter circuit 5 realizes current-limiting charge, prevents the excessive damage device of capacitance charging current
Part.
Two way convertor 3 in this specific embodiment be by set of power switches into full bridge circuit topological structure,
Device for power switching can be, but not limited to, IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar
Transistor npn npn), metal-oxide-semiconductor (insulating gate type field effect tube) or IGCT (Integrated Gate Commutated
Thyristors, integrated gate commutated thyristor), it is the due to voltage spikes produced when absorbed power switching device is switched on or off,
The high frequency capacitance in parallel preferably on device for power switching, full bridge circuit topological structure can realize rectification/inversion of electric energy
Two-way flow, its one end connection DC side, other end connection AC can realize that inversion is exchanged according to the active reactive of setting
The power supply of AC network is output to, can also realize that controlled rectification charges to energy storage device.
Controller 4 can be, but not limited to, at TI DSP, the MCU of Freescale or other producers data signal
Device is managed, over-sampling modulate circuit, driving output circuit and signal filter circuit etc. is generally included；The electric signal bag that controller 4 is gathered
Include but be not limited to：The letters such as feedback net current signal iac, the inductor current signal of AC and the capacitance current signal of AC
Number, in addition, controller 4 can also generate the SPWM control signals of control two way convertor internal power switching device work.
Direct current pre-charge circuit 7 is equipped with multiple current-limiting resistances, different according to the voltage class of energy storage device, and switching is different
The current-limiting resistance of quantity, realizes the access of wide-voltage range, without the situation of excessively stream.
DC side filter circuit 5 is exemplarily formed by electrochemical capacitor C1 is in parallel with LC resonance circuits, and electrochemical capacitor C1 inhales
The high-frequency harmonic in DC current is received, LC resonance circuits can suppress DC side electric current to be connected and being formed by inductance L and electric capacity C
Secondary pulsation, improve energy storage device cycle life.
AC filter circuit 6 can absorb the higher hamonic wave that the medium-high frequency switching device of two way convertor 3 is caused, AC filter
Wave circuit can be used but be not limited to LC types filter circuit or LCL type filter circuit, with reference to Fig. 2, and Fig. 2 is shown using string
The filter inductance L1 of connection and filter capacitor C2 compositions in parallel LC type filter circuits.
Exchange pre-charge circuit 8 and multiple current-limiting resistances are housed, according to the voltage magnitude of power network, and the limit of switching varying number
Leakage resistance, is not in the situation of excessively stream so as to realize the access of wide-voltage range, protection electric capacity and internal power device.
Based on technical concept same as the previously described embodiments, the utility model additionally provides a kind of energy storage converter system.
The structured flowchart for a kind of energy storage converter system that Fig. 3 provides for the utility model embodiment, as shown in figure 3, the storage
Energy converter system includes energy storage device 300, power network 400 and energy accumulation current converter 100 (or energy accumulation current converter 200), energy accumulation current converter
Be connected between energy storage device and power network, be energy storage device charging or be that power network is powered.When realizing, energy storage device is connected to energy storage
The energy storage end of current transformer, power network is connected to the power network end of energy accumulation current converter.
Energy storage device 300 is integrated with battery management system (BMS) in the present embodiment, realizes photovoltaic plant or wind power plant electricity
It can smoothly export, suppress voltage pulsation and peak load shifting；Energy storage device can be plumbic acid/lead carbon battery, lithium ion battery, super
Electric capacity or flying wheel battery etc., select different energy-accumulating mediums according to different application scenario, such as energy type energy storage, then can be with
Plumbic acid/lead carbon battery, francium flow battery etc. are selected, as stand-by power supply and/or peak load shifting, if power-type energy storage, then
The stabilization of power grids can be maintained using lithium ion battery, super capacitor etc., smooth electric energy output.The energy storage device of the present embodiment
Voltage range is 450-700V.
Power network 400 carries the dual role of energy accumulation current converter load and power supply, is received according to energy accumulation current converter
Different instruction converts role, and power network is not limited to the bulk power grid being generally considered to, can also be photovoltaic plant or wind power plant
The ac bus being connected with power network, in the present embodiment, power network are single phase ac power network.
In summary, the utility model embodiment discloses a kind of energy accumulation current converter and energy storage converter system, and this practicality is new
Type embodiment at least has the following advantages that：
1st, the secondary pulsation of energy accumulation current converter DC side electric current can be suppressed, the cycle life of energy storage device is improved.
2nd, the higher harmonic content in the alternating current of energy accumulation current converter AC can be filtered out, can be expired well
The electric energy output matter of the grid-connected requirement of sufficient energy storage device, the improvement photovoltaic plant supporting with it or the wind power plant distributed energy
Amount.
3rd, can be according to instruction works in grid-connected or off-grid mode of operation, the output of smooth distribution formula power supply reduces
Voltage pulsation, peak load shifting solves bulk power grid and touched less than the difficult problem of regional power supply.
It is described above, embodiment only of the present utility model, under above-mentioned teaching of the present utility model, this area
Technical staff can carry out other improvement or deformation on the basis of above-described embodiment.It will be understood by those skilled in the art that
Above-mentioned specific descriptions are more preferable explanation the purpose of this utility model, and protection domain of the present utility model should be with claim
Protection domain be defined.
Claims (10)
1. a kind of energy accumulation current converter, including energy storage end, power network end, the two way convertor that is connected between energy storage end and power network end with
And the controller being connected with two way convertor, it is characterised in that the energy accumulation current converter also includes filtering out two in DC current
The DC side filter circuit of frequency multiplication ripple, the DC side filter circuit is connected between energy storage end and two way convertor.
2. energy accumulation current converter according to claim 1, it is characterised in that the DC side filter circuit is LC resonance electricity
Road, the resonant frequency of the LC resonance circuits is twice of line voltage frequency.
3. energy accumulation current converter according to claim 2, it is characterised in that the DC side filter circuit also includes filtering out directly
The electrochemical capacitor of higher hamonic wave in electric current is flowed, the electrochemical capacitor is in parallel with the LC resonance circuits.
4. the energy accumulation current converter according to claim any one of 1-3, it is characterised in that the energy accumulation current converter also includes filter
Except the AC filter circuit of alternating current medium-high frequency harmonic wave, the AC filter circuit is connected to two way convertor and power network
Between end.
5. energy accumulation current converter according to claim 4, it is characterised in that the AC filter circuit is LC type filtered electricals
Road is LCL type filter circuit.
6. energy accumulation current converter according to claim 4, it is characterised in that the energy accumulation current converter also includes：Direct current preliminary filling
Circuit is connected between energy storage end and DC side filter circuit with pre-charge circuit, the direct current pre-charge circuit is exchanged, institute
Exchange pre-charge circuit is stated to be connected between the AC filter circuit and the power network end of energy accumulation current converter.
7. energy accumulation current converter according to claim 6, it is characterised in that the direct current pre-charge circuit includes multiple first
Current-limiting resistance, the number of the first current-limiting resistance is determined according to the voltage class for being linked into energy storage end；The exchange pre-charge circuit
Including multiple second current-limiting resistances, the number of the second current-limiting resistance is determined according to the voltage magnitude for being linked into power network end.
8. described in a kind of energy storage converter system, it is characterised in that including energy storage device, power network and claim any one of 1-7
Energy accumulation current converter, the energy accumulation current converter is connected between energy storage device and power network, for charging for the energy storage device or being
The power network is powered.
9. energy storage converter system according to claim 8, it is characterised in that the energy storage device be plumbic acid/lead carbon battery,
Lithium ion battery, super capacitor or flying wheel battery, the power network are bulk power grid or photovoltaic plant or wind power plant or are connected with power network
Ac bus.
10. energy storage converter system according to claim 8, it is characterised in that the power network is single phase ac power network.
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| CN201621404770.3U CN206412778U (en) | 2016-12-20 | 2016-12-20 | A kind of energy accumulation current converter and energy storage converter system |
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| CN201621404770.3U CN206412778U (en) | 2016-12-20 | 2016-12-20 | A kind of energy accumulation current converter and energy storage converter system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108306320A (en) * | 2017-12-11 | 2018-07-20 | 广州智光电气股份有限公司 | A kind of energy accumulation current converter and energy storage converter system |
| CN110022071A (en) * | 2019-04-18 | 2019-07-16 | 清华大学 | Hybrid energy-storing type commutator transformer and its control method |
| CN112436534A (en) * | 2020-11-18 | 2021-03-02 | 新风光电子科技股份有限公司 | Cascade H bridge energy storage system direct current side filter circuit |
| CN112803453A (en) * | 2021-03-29 | 2021-05-14 | 沈阳微控新能源技术有限公司 | Flywheel energy storage system, control method of flywheel energy storage system and storage medium |
| CN115333133A (en) * | 2022-10-14 | 2022-11-11 | 锦浪科技股份有限公司 | Energy storage system control method and device and energy storage system |
-
2016
- 2016-12-20 CN CN201621404770.3U patent/CN206412778U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108306320A (en) * | 2017-12-11 | 2018-07-20 | 广州智光电气股份有限公司 | A kind of energy accumulation current converter and energy storage converter system |
| CN110022071A (en) * | 2019-04-18 | 2019-07-16 | 清华大学 | Hybrid energy-storing type commutator transformer and its control method |
| CN110022071B (en) * | 2019-04-18 | 2020-07-10 | 清华大学 | Hybrid energy storage type direct current transformer and control method thereof |
| CN112436534A (en) * | 2020-11-18 | 2021-03-02 | 新风光电子科技股份有限公司 | Cascade H bridge energy storage system direct current side filter circuit |
| CN112803453A (en) * | 2021-03-29 | 2021-05-14 | 沈阳微控新能源技术有限公司 | Flywheel energy storage system, control method of flywheel energy storage system and storage medium |
| CN115333133A (en) * | 2022-10-14 | 2022-11-11 | 锦浪科技股份有限公司 | Energy storage system control method and device and energy storage system |
| CN115333133B (en) * | 2022-10-14 | 2023-02-28 | 锦浪科技股份有限公司 | Energy storage system control method and device and energy storage system |
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Effective date of registration: 20181108 Address after: 510760 No. 51 Pu Nan Road, Whampoa District, Guangzhou, Guangdong. Co-patentee after: Guangzhou Zhi Guang Electric Technology Co., Ltd. Patentee after: Guangzhou Zhiguang Electric Co., Ltd. Address before: 510760 No. 51 Pu Nan Road, Whampoa District, Guangzhou, Guangdong. Patentee before: Guangzhou Zhiguang Electric Co., Ltd. |