CN204258410U - Possesses the energy storage converter device of many Battery packs and super capacitor access function - Google Patents
Possesses the energy storage converter device of many Battery packs and super capacitor access function Download PDFInfo
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- CN204258410U CN204258410U CN201420702911.4U CN201420702911U CN204258410U CN 204258410 U CN204258410 U CN 204258410U CN 201420702911 U CN201420702911 U CN 201420702911U CN 204258410 U CN204258410 U CN 204258410U
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Abstract
本实用新型涉及一种具备多组电池和超级电容接入功能的储能变流装置，储能变流装置将多组储能介质如蓄电池及超级电容接入电路，确保其独立性的同时，实现电能优势互补，解决了现有储能装置无法满足同时能量和功率的技术问题。系统主回路采用AC/DC+DC/DC的两级结构，运行可靠性较高，同时使用了新颖的双向DC/DC拓扑结构和控制方式，极大的改善了电能质量，降低内部损耗。
The utility model relates to an energy storage and conversion device with the function of connecting multiple sets of batteries and supercapacitors. The energy storage and conversion device connects multiple sets of energy storage media such as batteries and supercapacitors into the circuit to ensure its independence. Realize the complementary advantages of electric energy, and solve the technical problem that the existing energy storage device cannot meet the energy and power at the same time. The main circuit of the system adopts the two-level structure of AC/DC+DC/DC, which has high operational reliability. At the same time, it uses a novel bidirectional DC/DC topology and control method, which greatly improves the power quality and reduces internal losses.
Description
Technical field
The utility model relates to a kind of mixed energy storage system, relates to a kind of energy storage converter device possessing plurality of groups of storage batteries and super capacitor access function more specifically.
Background technology
The application of energy storage technology is the important component part that strong intelligent grid is built, dsm be can effectively realize, peak-valley difference, level and smooth load round the clock eliminated, power equipment operational efficiency can be improved, reduce power supply cost, as promoting regenerative resource application, a kind of means of operation of power networks stability, load fluctuation of adjusting frequency, compensate can also be improved.A large amount of stored energy application field is included, as applied energy storage technology project, field of power distribution energy storage technology, electric automobile discharge and recharge technology, electric vehicle power sources etc. in the wind power generation of power field and photovoltaic generation in the intelligent grid emphasis investment field determined in the recent period of country.Along with the continuous progress of energy storage technology, fail safe is good, efficiency is high, clean environment firendly, the life-span is long, cost is low, energy density is large energy storage technology will continue to bring out, the fast development of whole power industry industrial chain will be driven, create huge economic benefit and social benefit.
Storage battery (Storage Battery) by the mode of charging, inner active material is regenerated, and is chemical energy, needs the energy storage device again chemical energy being converted to electric energy when discharging electrical power storage.Conventional storage battery comprises lead-acid battery, lithium ion battery, Ni-MH battery, nickel-cadmium cell and sodium sulfur storage battery etc.All kinds of storage battery is extensive application in daily life and industrial production, but due to its charge and discharge cycles number of times few, the charging interval is long, is not suitable for the shortcomings such as large-power occasions, limits its application in some field.
Super capacitor is a kind of electrochemical element that upper development in recent years is got up, it is different from traditional storage battery, there is not chemical reaction in thermal energy storage process, main dependence electric double layer and Redox pseudocapacitance charge storage electric energy, this process is reversible, makes the charge and discharge cycles number of times of super capacitor reach hundreds thousand of times.In addition, super capacitor energy density is high, and the discharge and recharge time is short, and operating temperature range is wide, and growing is a kind of energy-storage travelling wave tube efficiently.But super capacitor also also exists some shortcomings, its energy density is low, and storage power is few, and the holding power characteristic time is short, is not suitable for applying in extensive energy storage and electric automobile separately.
If by storage battery and super capacitor used in combination, the advantage that storage battery energy density is large and super capacitor power density is large, charge and discharge circulation life is grown is combined, greatly will improve the performance of energy-storage system.Storage battery and super capacitor used in combination, the power of energy-storage system can be increased, reduce the discharge and recharge number of times of storage battery, reduce the loss of storage battery, increase useful life, improve reliability and the economy of energy-storage system.
Energy storage converter device is the interface of electrical network and energy storage device, is the core cell of whole energy-storage system.The major loop topological sum control method of current energy storage converter device is mostly for single energy-accumulating medium, but storage battery or super capacitor be used alone the demand that cannot meet all kinds of energy-storage system, and go back imperfection for the circuit topology of hybrid energy-storing medium and the design of control method, therefore need a set of energy storage converter system for mixed type energy-accumulating medium.
Therefore, need a kind of new technical scheme to solve the problem.
Utility model content
The purpose of this utility model is to provide a kind of energy storage converter device possessing many Battery packs and super capacitor access function, and with solving, energy-accumulating medium in present stage energy storage device is single, the not high problem with meeting extensive energy storage demand of system power.
For realizing above-mentioned utility model object, the utility model can adopt following technical scheme:
Possess an energy storage converter device for many Battery packs and super capacitor access function, comprise two-way AC/DC module, connect the two-way DC/DC module of two-way AC/DC module; Two-way DC/DC module comprises at least two two-way DC/DC unit and is formed in parallel, and one of them two-way DC/DC unit connects storage battery interface, and another two-way DC/DC unit connects super capacitor interface; Direct current electromagnetic interface filter and DC circuit breaker is connected with between described storage battery interface and two-way DC/DC unit; Connection super capacitor interface is same with between two-way DC/DC unit is connected with direct current electromagnetic interface filter and DC circuit breaker; Two-way AC/DC module adopts three phase full bridge IGBT power model, and two-way DC/DC module adopts the circuit structure of three-phase half-bridge DC/DC crisscross parallel; Two-way AC/DC model calling is to grid interface, and AC/DC module exchanges main contactor, exchanges auxiliary contactor, exchanges electromagnetic interface filter and AC circuit breaker with being provided with between grid interface.
Compared with background technology, the utility model adopts storage battery and super capacitor hybrid energy-storing, and can give full play to the large and super capacitor power density of storage battery energy density greatly, charge and discharge cycles often, the advantages such as charge/discharge rates is fast, make device have good energy-storage property.And preferentially can carry out discharge and recharge to super capacitor, dissolve with super capacitor or release high-power energy in short-term; The charge and discharge process of storage battery can also be improved, reduce charge and discharge cycles number of times, also can reduce the depth of discharge of storage battery, extend useful life.
This energy storage converter device can access many Battery packs and super capacitor, by independently DC/DC module controls between each Battery pack group, realizes controlling the independence of many Battery packs charge/discharge.
Accompanying drawing explanation
Fig. 1 is the electrical block diagram that the utility model possesses the energy storage converter device of many Battery packs and super capacitor access function.
Embodiment
Below in conjunction with the drawings and specific embodiments, illustrate the utility model further, these execution modes should be understood and be only not used in restriction scope of the present utility model for illustration of the utility model, after having read the utility model, the amendment of those skilled in the art to the various equivalent form of value of the present utility model has all fallen within the application's claims limited range.
Refer to shown in Fig. 1, in Fig. 1, KM1 is AC circuit breaker, and KM2, KM3 are divided into interchange main contactor and exchange auxiliary contactor, is respectively used to connect electrical network and AC/DC module.KMn (n=4,5 ...) be DC circuit breaker.
Possess the energy storage converter device of many Battery packs and super capacitor access function disclosed in the utility model, major loop comprises two-way AC/DC module, connects the two-way DC/DC module of two-way AC/DC module; Two-way DC/DC module comprises at least two two-way DC/DC unit and is formed in parallel, and one of them two-way DC/DC unit connects storage battery interface, and another two-way DC/DC unit connects super capacitor interface; Direct current electromagnetic interface filter and DC circuit breaker is connected with between described storage battery interface and two-way DC/DC unit; Connection super capacitor interface is same with between two-way DC/DC unit is connected with direct current electromagnetic interface filter and DC circuit breaker.
Two-way AC/DC model calling has SVPWM.Two-way AC/DC module (three-phase VSR) adopts three phase full bridge IGBT power model, can phase relation between Controling network side phase current and phase voltage, has reached Controling network side power factor
object, realize four quadrant running.The major function of three-phase VSR is to keep high-quality and the unity power factor of stable, the ac-side current of DC bus-bar voltage.The utility model uses the Space Vector Control Strategy based on grid voltage orientation, adopt direct voltage outer shroud, the double circle structure of current on line side inner ring, with line voltage space vector for direction unit, realize the oriented control to the sense of current, closed loop output variable is converted into pulse signal after space vector pulse width modulation (SVPWM).
And two-way DC/DC module adopts the circuit structure of three-phase half-bridge DC/DC crisscross parallel, the double-direction control of charge/discharge can be realized.The utility model adopts inductive current inner ring, and the twin nuclei of output voltage outer ring, can meet constant current charge, constant voltage charge, the multiple technologies demands such as constant-current discharge.Adopt the control mode of the complementary conducting of pipe up and down in working control, the occasion which frequently switches at bidirectional power has clear superiority.
Two-way AC/DC model calling is to grid interface, and AC/DC module exchanges main contactor, exchanges auxiliary contactor, exchanges electromagnetic interface filter and AC circuit breaker with being provided with between grid interface.Exchange between main contactor and two-way AC/DC module and be also provided with a LC filter circuit.Secondary circuit comprises sample circuit, control circuit, protective circuit, telecommunication circuit, cooling circuit, heater circuit, input and output amount circuit, power circuit, drive circuit, photoelectric switching circuit.
Two-way DC/DC model calling has 3 tunnels independently pwm control circuit separately.The DC side of two-way AC/DC module is provided with a Support Capacitor.The storage battery that storage battery interface connects can be lead-acid battery or lithium ion battery or Ni-MH battery or nickel-cadmium cell or sodium sulfur storage battery or fuel cell batteries.
This secondary circuit possessing the energy storage converter device of many Battery packs and super capacitor access function comprises sample circuit, control circuit, protective circuit, telecommunication circuit, cooling circuit, heater circuit, input and output amount circuit, power circuit, drive circuit, photoelectric switching circuit.
The utility model adopts storage battery and super capacitor hybrid energy-storing, and can give full play to the large and super capacitor power density of storage battery energy density greatly, often, the advantages such as charge/discharge rates is fast, make device have good energy-storage property to charge and discharge cycles.And preferentially can carry out discharge and recharge to super capacitor, dissolve with super capacitor or release high-power energy in short-term; The charge and discharge process of storage battery can also be improved, reduce charge and discharge cycles number of times, also can reduce the depth of discharge of storage battery, extend useful life.This energy storage converter device can access many Battery packs and super capacitor, by independently DC/DC module controls between each Battery pack group, realizes controlling the independence of many Battery packs charge/discharge.
The operation instruction that the utility model possesses the energy storage converter device of many Battery packs and super capacitor access function comprises:
1, when system starts, the DC circuit breaker in first closed super capacitor loop, charging circuit charges to super capacitor, and now bank of super capacitors both end voltage raises, and batteries both end voltage is constant.When bank of super capacitors both end voltage is increased to storage battery starting resistor, closed storage battery loop DC circuit breaker, completes whole start-up course, and system enters many group energy-accumulating medium blend modes of operation.
2, during system charging, charge to super capacitor, bank of super capacitors both end voltage raises, and batteries both end voltage is constant.When bank of super capacitors both end voltage rises to set point, control super capacitor to charge in batteries, outer charging circuit is simultaneously to storage battery and super capacitor charging.
3, during system discharge, first by super capacitor supplying power for outside, bank of super capacitors both end voltage reduces, and batteries both end voltage is not.When bank of super capacitors both end voltage is down to set point, controls storage battery supplying power for outside, and super capacitor is charged simultaneously.
4, during system works, according to actual capacity demand and application scenario, batteries or bank of super capacitors are dropped into and cut out.
5, when many group energy-accumulating mediums work simultaneously, if wherein one group of DC loop breaks down, this fault loop of Systematical control disconnects, and all the other DC loop are redistributed power or dropped into one group of new DC loop.When the fault loop detected is replied normally, then reply the loop of disconnection.
When grid power blackout or when breaking down, Systematical control energy storage device transfers to from net mode of operation from grid-connected mode of operation, provides required power and energy, realize uninterrupted power supply by energy-accumulating medium to critical loads.Charge-discharge circuit controls batteries constant-current discharge, and its power output equals the average power in critical loads running.Bank of super capacitors as DC bus powered by charge-discharge circuit, be mainly used in peak power requirements when providing load startup or motor to accelerate, and receive the charging of DC bus when load is closed down or motor stopping constant power demand reduces.In the process, energy storage device continuous firing is until electrical network replys power supply.If interruption duration is longer, the state-of-charge of batteries and bank of super capacitors is lower than set point, and Systematical control load is closed down in the secure state and stopped energy storage device powering.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420702911.4U CN204258410U (en) | 2014-11-20 | 2014-11-20 | Possesses the energy storage converter device of many Battery packs and super capacitor access function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420702911.4U CN204258410U (en) | 2014-11-20 | 2014-11-20 | Possesses the energy storage converter device of many Battery packs and super capacitor access function |
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| CN204258410U true CN204258410U (en) | 2015-04-08 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105356576A (en) * | 2015-10-27 | 2016-02-24 | 中广核太阳能开发有限公司 | Grid-connection type photovoltaic direct current microgrid system and operational control method therefor |
| CN108521150A (en) * | 2018-04-19 | 2018-09-11 | 西安交通大学 | A multifunctional storage battery charging and discharging device and its control method |
| CN112994075A (en) * | 2019-12-13 | 2021-06-18 | 阳光电源股份有限公司 | Photovoltaic off-grid hydrogen production method and system |
| CN113113923A (en) * | 2020-12-24 | 2021-07-13 | 南京工业职业技术大学 | Two-stage energy storage system main circuit for hybrid energy storage and power module thereof |
| US11601040B2 (en) | 2016-12-14 | 2023-03-07 | Aquahydrex, Inc. | AC to DC power supply systems and methods |
-
2014
- 2014-11-20 CN CN201420702911.4U patent/CN204258410U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105356576A (en) * | 2015-10-27 | 2016-02-24 | 中广核太阳能开发有限公司 | Grid-connection type photovoltaic direct current microgrid system and operational control method therefor |
| US11601040B2 (en) | 2016-12-14 | 2023-03-07 | Aquahydrex, Inc. | AC to DC power supply systems and methods |
| CN108521150A (en) * | 2018-04-19 | 2018-09-11 | 西安交通大学 | A multifunctional storage battery charging and discharging device and its control method |
| CN112994075A (en) * | 2019-12-13 | 2021-06-18 | 阳光电源股份有限公司 | Photovoltaic off-grid hydrogen production method and system |
| CN112994075B (en) * | 2019-12-13 | 2024-05-14 | 阳光电源股份有限公司 | Photovoltaic off-grid hydrogen production method and system |
| CN113113923A (en) * | 2020-12-24 | 2021-07-13 | 南京工业职业技术大学 | Two-stage energy storage system main circuit for hybrid energy storage and power module thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Granted publication date: 20150408 |
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| CX01 | Expiry of patent term |