CN102185487A - Mixed cascading type multilevel stored energy charging-discharging and voltage-equalizing circuit - Google Patents
Mixed cascading type multilevel stored energy charging-discharging and voltage-equalizing circuit Download PDFInfo
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- CN102185487A CN102185487A CN2011101270358A CN201110127035A CN102185487A CN 102185487 A CN102185487 A CN 102185487A CN 2011101270358 A CN2011101270358 A CN 2011101270358A CN 201110127035 A CN201110127035 A CN 201110127035A CN 102185487 A CN102185487 A CN 102185487A
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Abstract
The invention relates to a mixed cascading type multilevel stored energy charging-discharging and voltage-equalizing circuit, which is characterized by comprising a multilevel converter, inductors, a voltage and current detection unit and a controller, wherein the multilevel converter comprises a three-phase circuit, each phase circuit comprises a plurality of tandem cascading units, and two connectors of each cascading unit are respectively connected with connectors of the adjacent cascading unit in series; three-phase output ends of the multilevel converter are connected with loads and three-phase input ends of the multilevel converter are respectively connected with an external power grid by the inductors; and power-grid input sides of each inductor are respectively connected with the voltage and current detection unit, the voltage and current detection unit is used for transmitting detected power-grid voltage and current signals to the controller, and the controller carries out information interaction with the multilevel converter. In the circuit, a stored energy structure with a mixed structure of storage batteries and a super capacitor is adopted, thus decreasing direct series-parallel connection of stored energy units, and being simpler in circuit structure. The circuit can be widely applied to stored energy of electric systems, electric automobiles and other systems.
Description
Technical field
The present invention relates to a kind of many level energy storage charging-discharging controller topological structure, particularly energy storage discharges and recharges and equalizer circuit about a kind of many level of Mixed cascading type.
Background technology
Adopt the energy storage device of storage battery and ultracapacitor etc. in electric power system energy storage and electric automobile, to obtain application more and more widely.Charging-discharging controller in the energy storage device, all press and flow equalizing circuit can improve the utilance of energy storage device, avoid the inconsistent all pressures that cause of monomer characteristic and equal flow problems, the life-span of improving energy-storage units.
At present, discharging and recharging of storage battery and ultracapacitor all is to adopt single power supply that whole energy storage device is charged, and by charging-discharging controller the voltage and current of charging controlled.In addition, in energy storage device inside equalizer circuit is set, the voltage of inner each energy-storage units carries out equilibrium control.Existing equalizer circuit can be divided into two big classes substantially: a class is an energy consumption type electric voltage equalization method, and the energy consumption of some energy storage monomer that overcharges on parallel resistor, is suffered damage to avoid this monomer.Mainly contain that resistance is all pressed, switch resistance is all pressed and voltage-stabiliser tube isostatic pressing etc., these methods be with energy consumption on resistance, the efficient of equalizer circuit is lower.Another kind of is energy transfer electric voltage equalization method, utilize inductance, electric capacity, transformer etc. to shift intermediary as energy, energy unnecessary on some monomer is transferred on other monomers, and inductance, electric capacity and transformer homenergic transfer intermediary's volume and cost are all higher in these class methods.And existing above-mentioned two class methods all are to occur adjusting passively unbalanced the time at voltage, and initiative is lower.
Summary of the invention
At the problems referred to above, the purpose of this invention is to provide a kind of simple in structurely, equalizer circuit efficient is higher, can realize that the control energy-storage units all presses many level of the Mixed cascading type energy storage with current-sharing to discharge and recharge and equalizer circuit.
For achieving the above object, the present invention takes following technical scheme: the energy storage of a kind of many level of Mixed cascading type discharges and recharges and equalizer circuit, it is characterized in that: it comprises multi-level converter, inductance, voltage and current detecting unit and controller, described multi-level converter comprises three-phase circuit, every circuitry phase includes the cascade unit of several series connection, and two splicing ears of each described cascade unit are connected with the splicing ear of adjacent described cascade unit respectively; The three-phase output end of described multi-level converter connects load, and the three-phase input end of described multi-level converter connects external electrical network through a described inductance respectively; The electrical network input side of each described inductance all is connected to described voltage and current detecting unit, described voltage and current detecting unit transfers to described controller with detected line voltage and current signal, and described controller and described multi-level converter carry out information interaction.
Each described cascade unit includes the elementary cell and a H bridge inverter of several series connection, two input terminals of described H bridge inverter respectively with series connection after be positioned at two ends described elementary cell lead-out terminal be connected; Two outputs of described H bridge inverter are two splicing ears of described cascade unit.
Each described elementary cell includes three lead-out terminals, and two adjacent described elementary cells adopt by first lead-out terminal and second lead-out terminal cascaded structure or adopt by second lead-out terminal and the 3rd lead-out terminal cascaded structure.
The brachium pontis that each described elementary cell includes voltage sensor, energy-storage units and become by the set of power switches of two series connection, described voltage sensor two ends described energy-storage units in parallel successively and brachium pontis, described voltage sensor with detected described energy-storage units electrical transmission to described controller.
In same described cascade unit, each described energy-storage units all adopts storage battery or super capacitor.
In same described cascade unit, the energy-storage units in a part of described elementary cell adopts storage battery as energy-storage units, and all the other divide the energy-storage units in the described elementary cell to adopt super capacitor as energy-storage units.
H bridge inverter in each described cascade unit comprises the brachium pontis of two parallel connections, and each described brachium pontis becomes by two set of power switches.
Described controller comprises a digital signal microprocessor, a communication interface, a power module, one mould/number conversion module, a state display module, an external memory modules, a PWM expansion module and a PWM driver module; Described digital signal microprocessor is realized and the PC communication by described communication interface; Described power module is described controller power supply; The conversion of signals that described mould/number conversion module is used for described voltage and current detecting unit and voltage sensor collection is a digital signal, inputs to described digital signal microprocessor; Described state display module is used for the running status of described controller is shown; Described external memory modules is used for the parameter of described controller running and variable are stored; Described PWM expansion module is used for the pwm signal that described digital signal microprocessor produces is expanded to needed each control signal of circuit control, comes all device for power switching in the drive circuit by described PWM driver module.
The present invention is owing to take above technical scheme, it has the following advantages: 1, the present invention is made up of multi-level converter, voltage and current detecting unit and controller, multi-level converter is by the cascade unit of several series connection, the elementary cell that contains several series connection in each cascade unit again, and in same cascade unit, can adopt the energy storing structure of storage battery and super capacitor mixed structure, reduce the direct connection in series-parallel of energy-storage units like this, circuit structure is fairly simple.2, multi-level converter of the present invention is output as voltage with multiple levels, makes that like this saltus step of output voltage and harmonic wave are less, and the efficient of equalizer circuit is higher.3, the present invention is owing to adopt controller and multi-level converter to carry out information interaction, the state of energy-storage units can send controller to by voltage sensor in each elementary cell, for controller provides foundation to the control of each energy-storage units, can measure the open circuit voltage of each energy-storage units very easily and estimate dump energy.4, the present invention adopts the cascade unit of hybrid energy storing structure, multiple energy-accumulating medium can be mixed in the circuit, forms mixed energy storage system, therefore, has improved systematic function.5, the present invention may operate under the higher switching frequency like this owing to adopt and to have low-voltage device to constitute brachium pontis, though and the device rated voltage of H bridge inverter higher, switching frequency can only be a fundamental frequency.The present invention can be widely used in the systems such as electric power system energy storage and electric automobile.
Description of drawings
Fig. 1 is a general structure schematic diagram of the present invention;
Fig. 2 is a cascade cellular construction schematic diagram of the present invention;
Fig. 3 is the basic cell structure schematic diagram that the present invention adopts storage battery formula energy-storage units;
Fig. 4 is the basic cell structure schematic diagram that the present invention adopts super capacitor formula energy-storage units;
Fig. 5 is a H bridge inverter structural representation of the present invention;
Fig. 6 is a controller architecture schematic diagram of the present invention.
Embodiment
Below in conjunction with drawings and Examples the present invention is described in detail.
As shown in Figure 1, the present invention includes multi-level converter 1, inductance 2, voltage and current detecting unit 3 and controller 4, wherein, multi-level converter 1 comprises three-phase circuit, every circuitry phase includes the cascade unit 5 of several series connection, two splicing ear X of each cascade unit 5
1, X
2Respectively with the splicing ear X of Adjacent Concatenation unit 5
2, Adjacent Concatenation unit 5 splicing ear X
1Series connection.The three-phase output end of multi-level converter 1 connects threephase load a, b and c, realizes discharging function, is electric; The three-phase input end U of multi-level converter 1
Sa, U
SbAnd U
ScConnect external electrical network through an inductance 2 respectively, by inductance 2 with the current signal filtering of electrical network input, current limliting after in the input multi-level converter 1, realize charge function.The electrical network input side of each inductance 2 all is connected to voltage and current detecting unit 3, and voltage and current detecting unit 3 transfers to controller 4 with detected line voltage and current signal, and controller 4 carries out information interaction with multi-level converter 1.Controller 4 with the signal processing that receives after, be sent to multi-level converter 1, detect the voltage of energy-storage units in the multi-level converter 1 and also estimate dump energy (SOC).
In the foregoing description, as shown in Figure 2, each cascade unit 5 includes the elementary cell 50 and a H bridge inverter 51 of several series connection, two input terminal X of H bridge inverter 51 in the multi-level converter 1
3, X
4Respectively with series connection after be positioned at two ends elementary cell 50 lead-out terminals be connected; Two outputs of H bridge inverter 51 are two splicing ear X of cascade unit 5
1, X
2
Each elementary cell 50 includes three lead-out terminal X
5, X
6And X
7, two adjacent elementary cells 50 can adopt by lead-out terminal X
5, X
6Series connection also can be adopted by lead-out terminal X
6, X
7Series connection.
In the foregoing description, as shown in Figure 3, Figure 4, elementary cell 50 comprises voltage sensor 501, energy-storage units 502 and the brachium pontis of being made up of the device for power switching 503,504 of two series connection 505, voltage sensor 501 two ends energy-storage units 502 in parallel successively and brachium pontis 505, voltage sensor 501 with detected energy-storage units 502 voltage transmission to controller 4.The collector electrode of first device for power switching 503 connects positive pole and this elementary cell 50 lead-out terminal X of energy-storage units 502 respectively in the brachium pontis 505
5, emitter connects collector electrode and this elementary cell 50 lead-out terminal X of second device for power switching 504 respectively
6The emitter of second device for power switching 504 connects the negative pole of energy-storage units 502 and the 3rd lead-out terminal X of this elementary cell 50 respectively
7In use, adopt by lead-out terminal X when one of them elementary cell 50
5, X
6During series connection, if brachium pontis 505 internal power switching devices 503 conductings, device for power switching 504 turn-offs, then this elementary cell 50 is by bypass, energy-storage units 502 in this elementary cell 50 neither charges and does not also discharge, if device for power switching 503 turn-offs device for power switching 504 conductings, then energy-storage units 502 is sealed in the loop, and energy-storage units 502 is recharged or is discharged; When each elementary cell 50 adopts by lead-out terminal X
6, X
7During series connection, principle and aforementioned principles are similar.
Wherein, in same cascade unit 5, energy-storage units 502 that can be all is same type, all adopts storage battery as energy-storage units (as shown in Figure 3), or all adopts super capacitor as energy-storage units (as shown in Figure 4); Also can adopt storage batterys as energy-storage units (as shown in Figure 3) by a part of elementary cell 50 interior energy-storage units 502, energy-storage units 502 in the remainder elementary cell 50 adopts super capacitor as energy-storage units (as shown in Figure 4), makes that cascade unit 5 is a hybrid energy storing structure.
In the various embodiments described above, as shown in Figure 5, the H bridge inverter 51 in each cascade unit 5 comprises the brachium pontis 511 of two parallel connections, and each brachium pontis 511 is formed by two device for power switching 512,513.Device for power switching 512,513 magnitudes of voltage in the H bridge inverter 51 are determined jointly by the magnitude of voltage of the sum of series energy-storage units 502 of elementary cell 50 in the cascade unit 5 at its place; The voltage of multi-level converter 1 output can determine jointly by the progression of cascade unit 5, the magnitude of voltage of sum of series energy-storage units 502 of elementary cell 50 in the cascade unit 5.
In the various embodiments described above, each device for power switching in each elementary cell 50 503,504 is selected corresponding power semiconductor according to the grade of rated voltage of energy-storage units 502, as MOSFET and IGBT etc.Each device for power switching 512,513 in the H bridge inverter 51 is selected corresponding power semiconductor switch according to the number of elementary cell 50 series connection and the rated voltage of energy-storage units 502, such as IGBT, IGCT etc.
In the various embodiments described above, as shown in Figure 6, controller 4 comprises a digital signal microprocessor 41, a communication interface 42, a power module 43, one mould/number conversion module 44, a state display module 45, an external memory modules 46, a PWM (pulse-width signal) expansion module 47 and a PWM driver module 48.
The model that digital signal microprocessor 41 can adopt TIX (TI) to produce is the chip of TMS320F28335, and digital signal microprocessor 41 is by the communication between communication interface 42 realizations and PC and other equipment; Communication interface 42 adopts 232 communications and 485 communication modes.
Power module 43 adopts the TPS767D301 chip of Texas Instruments, is embodied as controller 4 power supplies.
The conversion of signals that mould/number conversion module 44 is used for voltage and current detecting unit 3 and voltage sensor 501 collections is a digital signal, inputs in the digital signal microprocessor 41 calculating of control system.
State display module 45 is used for the running status of controller 4 is shown.
External memory modules 46 is used for the parameter and the variable of controller 4 runnings are stored.
The various embodiments described above only are used to illustrate the present invention; the connection of each parts and structure all can change to some extent; on the basis of technical solution of the present invention; all improvement and equivalents of the connection and the structure of individual component being carried out according to the principle of the invention all should not got rid of outside protection scope of the present invention.
Claims (9)
1. many level of Mixed cascading type energy storage discharges and recharges and equalizer circuit, it is characterized in that: it comprises multi-level converter, inductance, voltage and current detecting unit and controller, described multi-level converter comprises three-phase circuit, every circuitry phase includes the cascade unit of several series connection, and two splicing ears of each described cascade unit are connected with the splicing ear of adjacent described cascade unit respectively; The three-phase output end of described multi-level converter connects load, and the three-phase input end of described multi-level converter connects external electrical network through a described inductance respectively; The electrical network input side of each described inductance all is connected to described voltage and current detecting unit, described voltage and current detecting unit transfers to described controller with detected line voltage and current signal, and described controller and described multi-level converter carry out information interaction.
2. a kind of many level of Mixed cascading type as claimed in claim 1 energy storage discharges and recharges and equalizer circuit, it is characterized in that: each described cascade unit includes the elementary cell and a H bridge inverter of several series connection, two input terminals of described H bridge inverter respectively with series connection after be positioned at two ends described elementary cell lead-out terminal be connected; Two outputs of described H bridge inverter are two splicing ears of described cascade unit.
3. a kind of many level of Mixed cascading type as claimed in claim 2 energy storage discharges and recharges and equalizer circuit, it is characterized in that: each described elementary cell includes three lead-out terminals, and two adjacent described elementary cells adopt by first lead-out terminal and second lead-out terminal cascaded structure or adopt by second lead-out terminal and the 3rd lead-out terminal cascaded structure.
4. a kind of many level of Mixed cascading type as claimed in claim 2 energy storage discharges and recharges and equalizer circuit, it is characterized in that: the brachium pontis that each described elementary cell includes voltage sensor, energy-storage units and become by the set of power switches of two series connection, described voltage sensor two ends described energy-storage units in parallel successively and brachium pontis, described voltage sensor with detected described energy-storage units electrical transmission to described controller.
5. a kind of many level of Mixed cascading type as claimed in claim 4 energy storage discharges and recharges and equalizer circuit, it is characterized in that: in same described cascade unit, each described energy-storage units all adopts storage battery or super capacitor.
6. a kind of many level of Mixed cascading type as claimed in claim 4 energy storage discharges and recharges and equalizer circuit, it is characterized in that: in same described cascade unit, energy-storage units in the described elementary cell of a part adopts storage battery as energy-storage units, and all the other divide the energy-storage units in the described elementary cell to adopt super capacitor as energy-storage units.
7. discharge and recharge and equalizer circuit as claim 1 or 2 or 3 or 4 or 5 or 6 described a kind of many level of Mixed cascading type energy storage, it is characterized in that: the H bridge inverter in each described cascade unit comprises the brachium pontis of two parallel connections, and each described brachium pontis becomes by two set of power switches.
8. discharge and recharge and equalizer circuit as claim 1 or 2 or 3 or 4 or 5 or 6 described a kind of many level of Mixed cascading type energy storage, it is characterized in that: described controller comprises a digital signal microprocessor, a communication interface, a power module, one mould/number conversion module, a state display module, an external memory modules, a PWM expansion module and a PWM driver module;
Described digital signal microprocessor is realized and the PC communication by described communication interface;
Described power module is described controller power supply;
The conversion of signals that described mould/number conversion module is used for described voltage and current detecting unit and voltage sensor collection is a digital signal, inputs to described digital signal microprocessor;
Described state display module is used for the running status of described controller is shown;
Described external memory modules is used for the parameter of described controller running and variable are stored;
Described PWM expansion module is used for the pwm signal that described digital signal microprocessor produces is expanded to needed each control signal of circuit control, comes all device for power switching in the drive circuit by described PWM driver module.
9. a kind of many level of Mixed cascading type as claimed in claim 7 energy storage discharges and recharges and equalizer circuit, it is characterized in that: described controller comprises a digital signal microprocessor, a communication interface, a power module, one mould/number conversion module, a state display module, an external memory modules, a PWM expansion module and a PWM driver module;
Described digital signal microprocessor is realized and the PC communication by described communication interface;
Described power module is described controller power supply;
The conversion of signals that described mould/number conversion module is used for described voltage and current detecting unit and voltage sensor collection is a digital signal, inputs to described digital signal microprocessor;
Described state display module is used for the running status of described controller is shown;
Described external memory modules is used for the parameter of described controller running and variable are stored;
Described PWM expansion module is used for the pwm signal that described digital signal microprocessor produces is expanded to needed each control signal of circuit control, comes all device for power switching in the drive circuit by described PWM driver module.
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| CN102826054A (en) * | 2012-08-14 | 2012-12-19 | 深圳先进技术研究院 | Multi-functional integrated power electronic system of electric automobile |
| CN103151783A (en) * | 2013-04-09 | 2013-06-12 | 马伏军 | Three-phase high-voltage cascading mixing power compensator and control method thereof |
| CN103746432A (en) * | 2013-12-05 | 2014-04-23 | 东南大学 | Cascading multi-level super capacitor energy storage system and discharge mode control method |
| CN103780116A (en) * | 2014-01-28 | 2014-05-07 | 华南理工大学 | N-output single-phase N+1-switch-group MMC inverter and control method of N-output single-phase N+1-switch-group MMC inverter |
| CN103812128A (en) * | 2014-02-18 | 2014-05-21 | 东南大学 | Chained hybrid energy storage system with LC tuned filter and control method thereof |
| CN103812225A (en) * | 2014-02-18 | 2014-05-21 | 东南大学 | Asymmetric chain type hybrid energy storage system and control method thereof |
| WO2014101343A1 (en) * | 2012-12-24 | 2014-07-03 | 珠海万力达电气股份有限公司 | Linkage unit bypass control structure of chain-type active power filter and method thereof |
| CN104904106A (en) * | 2012-11-15 | 2015-09-09 | Abb技术有限公司 | Apparatus for filtering harmonics in railway contact lines and method |
| CN105305815A (en) * | 2015-10-22 | 2016-02-03 | 北京京仪椿树整流器有限责任公司 | Voltage balanced control method for capacitors of L type Boost multi-level circuit |
| CN109193722A (en) * | 2018-10-08 | 2019-01-11 | 浙江大学 | In conjunction with the hybrid middle pressure AC network energy storage device of battery and super capacitor |
| CN110605979A (en) * | 2019-06-26 | 2019-12-24 | 长沙起克电气技术有限公司 | New energy automobile high-voltage electrical system |
| CN112234662A (en) * | 2020-08-21 | 2021-01-15 | 深圳智汇电力科技有限公司 | Reverse rapid charging circuit and charging method of power electronic short-circuit test device |
| US10931134B2 (en) | 2016-01-21 | 2021-02-23 | Huawei Technologies Co., Ltd. | Charging/discharging control apparatus |
| CN113022834A (en) * | 2019-12-25 | 2021-06-25 | 中国船舶重工集团公司第七一一研究所 | Composite energy storage device, control system and control method |
| CN113098307A (en) * | 2021-04-16 | 2021-07-09 | 南京工程学院 | Series-parallel hybrid multilevel converter with energy storage function and dual phase-shifting PWM control method |
| CN113162020A (en) * | 2021-04-20 | 2021-07-23 | 核工业西南物理研究院 | Current equalizing circuit structure with a large number of capacitors connected in parallel and power supply of ball-and-socket device |
| CN113472187A (en) * | 2021-08-18 | 2021-10-01 | 昆明理工大学 | High-frequency high-power SiC series voltage-sharing driver |
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| CN102826054A (en) * | 2012-08-14 | 2012-12-19 | 深圳先进技术研究院 | Multi-functional integrated power electronic system of electric automobile |
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| CN104904106B (en) * | 2012-11-15 | 2018-01-02 | Abb 技术有限公司 | Apparatus and method for filtering the harmonic wave in railway contact line |
| CN104904106A (en) * | 2012-11-15 | 2015-09-09 | Abb技术有限公司 | Apparatus for filtering harmonics in railway contact lines and method |
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| CN103812225A (en) * | 2014-02-18 | 2014-05-21 | 东南大学 | Asymmetric chain type hybrid energy storage system and control method thereof |
| CN103812128A (en) * | 2014-02-18 | 2014-05-21 | 东南大学 | Chained hybrid energy storage system with LC tuned filter and control method thereof |
| CN105305815A (en) * | 2015-10-22 | 2016-02-03 | 北京京仪椿树整流器有限责任公司 | Voltage balanced control method for capacitors of L type Boost multi-level circuit |
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| CN109193722A (en) * | 2018-10-08 | 2019-01-11 | 浙江大学 | In conjunction with the hybrid middle pressure AC network energy storage device of battery and super capacitor |
| CN110605979A (en) * | 2019-06-26 | 2019-12-24 | 长沙起克电气技术有限公司 | New energy automobile high-voltage electrical system |
| CN110605979B (en) * | 2019-06-26 | 2024-04-16 | 长沙起克电气技术有限公司 | New energy automobile high voltage electrical system |
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| CN113098307A (en) * | 2021-04-16 | 2021-07-09 | 南京工程学院 | Series-parallel hybrid multilevel converter with energy storage function and dual phase-shifting PWM control method |
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| CN113472187A (en) * | 2021-08-18 | 2021-10-01 | 昆明理工大学 | High-frequency high-power SiC series voltage-sharing driver |
| CN113472187B (en) * | 2021-08-18 | 2023-11-28 | 昆明理工大学 | High-frequency high-power SiC series voltage equalizing driver |
| CN115171456A (en) * | 2022-06-29 | 2022-10-11 | 国网宁夏电力有限公司培训中心 | Nuclear phase training device for special operation electrician |
| CN115171456B (en) * | 2022-06-29 | 2024-06-07 | 国网宁夏电力有限公司培训中心 | Nuclear phase training device for special operation electrician |
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