CN103441694A - Large-power distribution type energy storage converter - Google Patents
Large-power distribution type energy storage converter Download PDFInfo
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- CN103441694A CN103441694A CN2013103695313A CN201310369531A CN103441694A CN 103441694 A CN103441694 A CN 103441694A CN 2013103695313 A CN2013103695313 A CN 2013103695313A CN 201310369531 A CN201310369531 A CN 201310369531A CN 103441694 A CN103441694 A CN 103441694A
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Abstract
The invention discloses a large-power distribution type energy storage converter which is connected with two ends, namely a power grid and a battery. The large-power distribution type energy storage converter comprises a main circuit and a controller controlling the converter to work. The main circuit comprises a DC/DC conversion circuit, a bus capacitor, an AC/DC conversion circuit, a filtering circuit and an isolation transformer all of which are connected in sequence, wherein the DC/DC conversion circuit is connected with the battery, and the isolation transformer is connected with the power grid. The large-power distribution type energy storage converter further comprises a charging and discharging buffering interface circuit which is arranged between the DC/DC conversion circuit and the battery and used for limiting the charging currents of the battery, and the DC/DC conversion circuit is a conversion circuit with voltage boosting and voltage reduction functions. The large-power distribution type energy storage converter resolves the problem of VBR initial no-voltage charging, and meets the requirements of a charging characteristic curve.
Description
Technical field
The present invention relates to the electric power quality technical field, in particular, particularly a kind of high-power distributed energy storage current transformer.
Background technology
Along with China's economy constantly soars, the distribution network fast development, the appearance of the large power energy storage batteries such as the exploitation of regenerative resource and VBR thereof, the distributed bidirectional energy accumulation current converter is as the important component part of intelligent grid, the stability of its operation directly has influence on electrical network, energy-storage system and user's thereof safety and stability, for the special-purpose bi-directional inverter of VBR, rely on traditional bi-directional inverter, often be difficult to reach the requirement of VBR charging characteristic curve and no-voltage charging thereof.Therefore, develop a kind of high-power distributed energy storage bi-directional inverter, there is extremely wide market, and lay the foundation for the development of following intelligent grid and distributed energy storage system thereof.
Summary of the invention
The object of the invention is to, for there being the technical problem that can not meet VBR zero-voltage batteries charging requirement in prior art, provides a kind of high-power distributed energy storage current transformer.
In order to solve problem set forth above, the technical solution used in the present invention is:
A kind of high-power distributed energy storage current transformer, it is connected in electrical network and battery two ends, the controller that comprises main circuit and control this current transformer work, described main circuit comprises the DC/DC translation circuit connected successively, bus capacitor, the AC/DC translation circuit, filter circuit and isolating transformer, described DC/DC translation circuit is connected with battery, described isolating transformer is connected with electrical network, it also comprises is located between DC/DC translation circuit and battery and discharges and recharges the buffer interface circuit for what limit battery charge, and described DC/DC translation circuit is one to have and boost and the translation circuit of buck functionality.
According to a preferred embodiment of the invention: the described buffer interface circuit that discharges and recharges comprises DC circuit breaker, voltage sensor, current sensor, the direct current auxiliary contactor, branch road main contactor and buffer circuit, described DC circuit breaker is installed on the bus that is positioned at battery one side, described direct current auxiliary contactor and parallel with one another being installed on of branch road main contactor are positioned on the bus of DC/DC translation circuit one side, described buffer circuit is connected with the direct current auxiliary contactor, described voltage sensor is installed on the bus between DC circuit breaker and branch road main contactor, described current sensor is installed on the bus between branch road main contactor and DC/DC translation circuit.
According to a preferred embodiment of the invention: described DC/DC translation circuit comprises the first electric capacity, the second electric capacity, inductance, the first insulated gate bipolar transistor, the second insulated gate bipolar transistor, described the first electric capacity is positioned at and discharges and recharges buffer interface circuit one side, and described the first electric capacity one end is connected with inductance one end, the other end is connected with the grid of the first insulated gate bipolar transistor, the described inductance other end respectively with the drain electrode of the first insulated gate bipolar transistor, the grid of the second insulated gate bipolar transistor connects, described the second electric capacity is connected between the drain electrode of the grid of the first insulated gate bipolar transistor and the second insulated gate bipolar transistor.
According to a preferred embodiment of the invention: described AC/DC translation circuit is three brachium pontis three-phase inverters.
According to a preferred embodiment of the invention: described controller comprises interconnective dsp controller and RAM controller; also be provided with drive circuit and protective circuit between described dsp controller and main circuit; be equipped with transducer between described dsp controller and electrical network, battery, described RAM controller also is connected with display, keyboard, fan, buzzer and communication interface.
According to a preferred embodiment of the invention: the model of described dsp controller is TMS320C28335.
According to a preferred embodiment of the invention: described communication interface is the RS485 interface, and this interface adopts IEC61850 or MODBUS communication protocol.
Compared with prior art, beneficial effect of the present invention is:
1, adopted to have and boosted and the DC/DC translation circuit of buck functionality has been realized the two-way flow of current transformer energy;
What 2, be provided for limiting battery charge between DC/DC translation circuit and battery discharges and recharges the buffer interface circuit, has solved the problem of the initial no-voltage charging of VBR, makes it meet the requirement of charging characteristic curve.
The accompanying drawing explanation
Fig. 1. be the frame diagram of high-power distributed energy storage current transformer of the present invention.
Fig. 2. be main circuit diagram frame diagram in high-power distributed energy storage current transformer of the present invention.
Fig. 3. be the circuit diagram of DC/DC translation circuit in high-power distributed energy storage current transformer of the present invention.
Fig. 4. for discharging and recharging the circuit diagram of buffer interface circuit in high-power distributed energy storage current transformer of the present invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Consult shown in Fig. 1-Fig. 2, a kind of high-power distributed energy storage current transformer provided by the invention, it is connected in electrical network and battery two ends, the controller that comprises main circuit and control this current transformer work, described main circuit comprises the DC/DC translation circuit connected successively, bus capacitor C, the AC/DC translation circuit, filter circuit and isolating transformer, described DC/DC translation circuit is connected with battery, described isolating transformer is connected with electrical network, it also comprises is located between DC/DC translation circuit and battery and discharges and recharges the buffer interface circuit for what limit battery charge, and described DC/DC translation circuit is one to have and boost and the translation circuit of buck functionality.
Owing to adopting vanadium flow battery (being VBR) when the initial charge, the inside battery initial voltage is 0V.And different due to vanadium flow battery operation principle and initial voltage and conventional storage battery are brought certain difficulty to charging, particularly initial charge.When initial charge, the moment of connecting with battery is similar to Short-circuit Working Condition, the impulse current produced is the several times while charging normal, and is all a very large impact for vanadium liquid stream itself and energy accumulation current converter, so brings no small difficulty to initial charge.As the vanadium flow battery with the 20kW unit, when charging normal, charging voltage should be 56V, and charging current can not be greater than 140A.And, when initial charge, charging voltage should guarantee to be greater than 39V, the charging current provided should be more than 80A, otherwise its inner can protection, cause charging unsuccessfully.For general energy accumulation current converter, no matter be to charge normal, or, when initial charge, all should be able to meet the requirement of vanadium flow battery like this.But particular job state during due to initial charge, want to guarantee under similar Short-circuit Working Condition, enough charging voltage and charging currents can also be provided, and not trigger the protection of vanadium flow battery inside, this brings certain difficulty to the design of energy accumulation current converter.Therefore, the present invention designs one and discharges and recharges the buffer interface circuit and realize this function.
Consult shown in Fig. 4, the described buffer interface circuit that discharges and recharges comprises DC circuit breaker QF1, voltage sensor TV1, current sensor TA1, direct current auxiliary contactor KM1, branch road main contactor KM2 and buffer circuit R1, described DC circuit breaker QF1 is installed on the bus that is positioned at battery one side, described direct current auxiliary contactor KM1 and parallel with one another being installed on of branch road main contactor KM2 are positioned on the bus of DC/DC translation circuit one side, described buffer circuit R1 connects with direct current auxiliary contactor KM1, described voltage sensor TV1 is installed on the bus between DC circuit breaker QF1 and branch road main contactor KM2, described current sensor TA1 is installed on the bus between branch road main contactor KM2 and DC/DC translation circuit.This operation principle that discharges and recharges the buffer interface circuit is:
Can be as required, resistance value and the power grade of choose reasonable buffer circuit R1, the impulse current in the time of can be by initial charge is limited in safe range, guarantees that the energy accumulation current converter output voltage is not pulled low to start battery protection lower voltage limit by battery; In addition, by closure and the shutoff of certain sequencing control direct current auxiliary contactor KM1 and branch road main contactor KM2, in the time of just can solving vanadium liquid and flow initial charge impulse current greatly, the difficult problem that can not successfully charge.In addition, this discharges and recharges the buffer interface circuit when vanadium flow battery discharges, if according to certain sequential working, can also reduce the impulse current of energy accumulation current converter booting moment, and effectively the protection system Primary Component, guarantee the system even running.Be specially:
When initial charge, under the prerequisite that connects vanadium flow battery and energy accumulation current converter, DC circuit breaker QF1 manually closes.After energy accumulation current converter enters charge mode, first control direct current auxiliary contactor KM1 closure, due to the metering function that buffer resistance R1 is arranged, within charged electrical fails to be convened for lack of a quorum and is limited in safe range, the voltage of vanadium flow battery can climbed.Controller can detect the voltage of charging and the electric current of charging in real time by voltage sensor TV1 and current sensor TA1, reach (now thinking that the initial charge start-up course finishes) while charging normal voltage when charging voltage being detected, control again direct current main contactor KM2 closure, by buffer resistance R1 branch, short-circuit, after time delay a period of time, can control direct current auxiliary contactor KM1 and disconnect, by cut the going out of buffer resistance R1 branch road.So far, the charge initiation process completes, and enters normal charging condition.
Consult shown in Fig. 3, described DC/DC translation circuit comprises the first capacitor C 1, the second capacitor C 2, inductance L 1, the first insulated gate bipolar transistor IGBT 1, the second insulated gate bipolar transistor IGBT 2, described the first capacitor C 1 is positioned at and discharges and recharges buffer interface circuit one side, and described the first capacitor C 1 one ends are connected with inductance L 1 one ends, the other end is connected with the grid of the first insulated gate bipolar transistor IGBT 1, described inductance L 1 other end respectively with the drain electrode of the first insulated gate bipolar transistor IGBT 1, the grid of the second insulated gate bipolar transistor IGBT 2 connects, described the second capacitor C 2 is connected between the drain electrode of the grid of the first insulated gate bipolar transistor IGBT 1 and the second insulated gate bipolar transistor IGBT 2, the operation principle of this DC/DC translation circuit is:
When battery discharge, the DC/DC translation circuit need to complete boost function, and energy flows to high-pressure side by battery side.Now, form booster circuit by the first capacitor C 1, inductance L 1, the first insulated gate bipolar transistor IGBT 1, the inner integrated anti-paralleled diode of the second insulated gate bipolar transistor IGBT 2 and C2.Simultaneously under the prerequisite that guarantees the second insulated gate bipolar transistor IGBT 2 reliable turn-offs, according to certain control strategy (it is setup control program in controller as required), control the first insulated gate bipolar transistor IGBT 1 and open and turn-off with certain switching frequency and duty ratio, this circuit can complete boost function; And, when charge in batteries, the DC/DC translation circuit need to complete buck functionality, energy flows to the storage battery side by high-pressure side.Now, form reduction voltage circuit by the first capacitor C 1, inductance L 1, the inner integrated anti-paralleled diode of the first insulated gate bipolar transistor IGBT 1, the second insulated gate bipolar transistor IGBT 2 and the second capacitor C 2, equally under the prerequisite that guarantees the first insulated gate bipolar transistor IGBT 1 reliable turn-off, according to certain control strategy (its also setup control program in controller) as required, control the second insulated gate bipolar transistor IGBT 2 and open and turn-off with certain switching frequency and duty ratio, this circuit can complete buck functionality.
Further, the AC/DC translation circuit is three brachium pontis three-phase inverters.Described controller comprises interconnective dsp controller and RAM controller, and the model of the dsp controller that the present invention is selected is TMS320C28335.Also be provided with drive circuit and protective circuit between described dsp controller and main circuit; this drive circuit is general IGBT drive circuit, and protective circuit can design DC overvoltage protection, overcurrent protection, input reverse-connection protection, short-circuit protection, ground protection (having fault detection capability), under-voltage/overvoltage protection, overload protection, overtemperature protection, mistake/underfrequency protection, three-phase imbalance protection and warning, phase protection and resistance to earth monitoring and warning function as required.
Be equipped with transducer between described dsp controller and electrical network, battery, described RAM controller also is connected with display, keyboard, fan, buzzer and communication interface, and this communication interface is the RS485 interface, the RS485 interface adopts IEC61850 or MODBUS communication protocol.Mainly realize that the main micro-grid monitoring system with outside of energy accumulation current converter carries out information exchange, energy accumulation current converter will be delivered to micro-grid monitoring system backstage and can receive order and the definite value that backstage issues on the running status of self.
High-power distributed energy storage converter of the present invention is as the electric interfaces of electrical network and energy-storage system, play vital effect in New-energy power system, the electric energy that regenerative resource is sent, through current transformer conversion storage and the grid-connected safety and stability that can improve operation of power networks, has improved the power supply quality of electrical network to a great extent.And high-power distributed energy storage converter of the present invention is serving as the effect of core cell in whole electric energy storing system, direct relation accuracy, reliability and the response speed of whole energy-storage system operation.The function of its realization mainly comprises: when battery discharge by the converting direct-current voltage into alternating-current voltage of its generation, the feed-in electrical network; And, when battery charges, convert line voltage to direct voltage, supply with battery; Can also when grid cut-off, critical load be powered, both lonely network operation, had the peak load shifting function simultaneously.Mainly can also realize following functions: 1, energy accumulation current converter can be controlled its active power output according to the instruction of microgrid supervisory control system.By setting program in dsp chip, make energy accumulation current converter can receive also real-time tracking and carry out the active power control signal that the microgrid supervisory control system sends, according to the also signals such as voltage on line side, frequency, the microgrid supervisory control system control command meritorious output of adjusting automatically, guarantee that its peak power output and power variation rate are no more than set-point, under electric network fault and special operational mode, guarantee stability of power system; 2, energy accumulation current converter can be regulated idle output according to signal real-time trackings such as AC voltage levvl, microgrid supervisory control system control commands, and the parameters such as its regulative mode, reference voltage, voltage regulation, power factor can be set by outside microgrid supervisory control system; 3, during the lonely network operation of micro-electrical network, energy accumulation current converter is operated under the V/F control strategy, can guarantee that microgrid voltage, frequency are constant, supports the stable operation of whole micro-grid system as main power source; 4, energy accumulation current converter can be realized constant current charge, constant voltage charge, the charging of permanent power and custom curve charging; The functions such as constant-current discharge, pressure limiting electric discharge and permanent power discharge.
Above-described embodiment is preferably execution mode of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under Spirit Essence of the present invention and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection scope of the present invention.
Claims (7)
1. a high-power distributed energy storage current transformer, it is connected in electrical network and battery two ends, the controller that comprises main circuit and control this current transformer work, described main circuit comprises the DC/DC translation circuit connected successively, bus capacitor, the AC/DC translation circuit, filter circuit and isolating transformer, described DC/DC translation circuit is connected with battery, described isolating transformer is connected with electrical network, it is characterized in that: also comprise and be located between DC/DC translation circuit and battery and discharge and recharge the buffer interface circuit for what limit battery charge, and described DC/DC translation circuit is one to have and boost and the translation circuit of buck functionality.
2. high-power distributed energy storage current transformer according to claim 1, it is characterized in that: the described buffer interface circuit that discharges and recharges comprises DC circuit breaker (QF1), voltage sensor (TV1), current sensor (TA1), direct current auxiliary contactor (KM1), branch road main contactor (KM2) and buffer circuit (R1), described DC circuit breaker (QF1) is installed on the bus that is positioned at battery one side, described direct current auxiliary contactor (KM1) and parallel with one another being installed on of branch road main contactor (KM2) are positioned on the bus of DC/DC translation circuit one side, described buffer circuit (R1) is connected with direct current auxiliary contactor (KM1), described voltage sensor (TV1) is installed on the bus be positioned between DC circuit breaker (QF1) and branch road main contactor (KM2), described current sensor (TA1) is installed on the bus be positioned between branch road main contactor (KM2) and DC/DC translation circuit.
3. high-power distributed energy storage current transformer according to claim 1, it is characterized in that: described DC/DC translation circuit comprises the first electric capacity (C1), the second electric capacity (C2), inductance (L1), the first insulated gate bipolar transistor (IGBT1), the second insulated gate bipolar transistor (IGBT2), described the first electric capacity (C1) is positioned at and discharges and recharges buffer interface circuit one side, and described the first electric capacity (C1) end is connected with inductance (L1) end, the other end is connected with the grid of the first insulated gate bipolar transistor (IGBT1), described inductance (L1) other end respectively with the drain electrode of the first insulated gate bipolar transistor (IGBT1), the grid of the second insulated gate bipolar transistor (IGBT2) connects, described the second electric capacity (C2) is connected between the drain electrode of the grid of the first insulated gate bipolar transistor (IGBT1) and the second insulated gate bipolar transistor (IGBT2).
4. according to the described high-power distributed energy storage current transformer of claim 2 or 3, it is characterized in that: described AC/DC translation circuit is three brachium pontis three-phase inverters.
5. according to the described high-power distributed energy storage current transformer of claim 2 or 3; it is characterized in that: described controller comprises interconnective dsp controller and RAM controller; also be provided with drive circuit and protective circuit between described dsp controller and main circuit; be equipped with transducer between described dsp controller and electrical network, battery, described RAM controller also is connected with display, keyboard, fan, buzzer and communication interface.
6. high-power distributed energy storage current transformer according to claim 5, it is characterized in that: the model of described dsp controller is TMS320C28335.
7. high-power distributed energy storage current transformer according to claim 5, it is characterized in that: described communication interface is the RS485 interface, and this interface adopts IEC61850 or MODBUS communication protocol.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104065154A (en) * | 2014-06-09 | 2014-09-24 | 深圳微网能源管理系统实验室有限公司 | Frequency changer emergency power supply system |
| CN104104143A (en) * | 2014-06-30 | 2014-10-15 | 任磊 | Parallel-connected quiescent voltage restorer for isolating transient voltage fault of power system |
| WO2015117261A1 (en) * | 2014-02-07 | 2015-08-13 | 清华大学 | Circuit structure and control method for charging and discharging of vanadium battery |
| WO2015117262A1 (en) * | 2014-02-07 | 2015-08-13 | 清华大学 | Circuit and adaptive control method for suppressing self-starting surge current of vanadium battery |
| CN108199580A (en) * | 2018-02-11 | 2018-06-22 | 常州博能新能源有限公司 | Bidirectional DC/DC device and its control method |
| CN115436234A (en) * | 2022-09-05 | 2022-12-06 | 吉林大学 | Method for testing wettability evolution of induced diaphragm of continuous adjustable charging stress induction system |
| CN117728544A (en) * | 2024-02-07 | 2024-03-19 | 液流储能科技有限公司 | Direct current converging circuit and method for liquid flow energy storage new energy battery |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000262072A (en) * | 1999-03-11 | 2000-09-22 | Chiyoda:Kk | Electric power regenerative charging and discharging device |
| CN101807799A (en) * | 2010-04-27 | 2010-08-18 | 天津大学 | Super capacitor energy storage type power quality compensator |
| CN101917020A (en) * | 2010-08-04 | 2010-12-15 | 长沙理工大学 | Lift energy feedback, reactive compensation and switched-off emergency running method and system |
| CN102029926A (en) * | 2010-12-08 | 2011-04-27 | 浙江省电力试验研究院 | Standardized current conversion device of electric vehicle and distributed power source |
| CN102437612A (en) * | 2011-12-16 | 2012-05-02 | 辽宁荣信光伏技术有限公司 | Energy storing method of large-capacity vanadium battery for oversea petroleum platform |
| CN103219899A (en) * | 2013-04-09 | 2013-07-24 | 许继集团有限公司 | Hybrid energy storage converter device and operation control method thereof |
| CN203406794U (en) * | 2013-08-23 | 2014-01-22 | 广西电网公司电力科学研究院 | Large power distributed energy storage current transformer |
-
2013
- 2013-08-23 CN CN2013103695313A patent/CN103441694A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000262072A (en) * | 1999-03-11 | 2000-09-22 | Chiyoda:Kk | Electric power regenerative charging and discharging device |
| CN101807799A (en) * | 2010-04-27 | 2010-08-18 | 天津大学 | Super capacitor energy storage type power quality compensator |
| CN101917020A (en) * | 2010-08-04 | 2010-12-15 | 长沙理工大学 | Lift energy feedback, reactive compensation and switched-off emergency running method and system |
| CN102029926A (en) * | 2010-12-08 | 2011-04-27 | 浙江省电力试验研究院 | Standardized current conversion device of electric vehicle and distributed power source |
| CN102437612A (en) * | 2011-12-16 | 2012-05-02 | 辽宁荣信光伏技术有限公司 | Energy storing method of large-capacity vanadium battery for oversea petroleum platform |
| CN103219899A (en) * | 2013-04-09 | 2013-07-24 | 许继集团有限公司 | Hybrid energy storage converter device and operation control method thereof |
| CN203406794U (en) * | 2013-08-23 | 2014-01-22 | 广西电网公司电力科学研究院 | Large power distributed energy storage current transformer |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015117261A1 (en) * | 2014-02-07 | 2015-08-13 | 清华大学 | Circuit structure and control method for charging and discharging of vanadium battery |
| WO2015117262A1 (en) * | 2014-02-07 | 2015-08-13 | 清华大学 | Circuit and adaptive control method for suppressing self-starting surge current of vanadium battery |
| CN104065154A (en) * | 2014-06-09 | 2014-09-24 | 深圳微网能源管理系统实验室有限公司 | Frequency changer emergency power supply system |
| CN104104143A (en) * | 2014-06-30 | 2014-10-15 | 任磊 | Parallel-connected quiescent voltage restorer for isolating transient voltage fault of power system |
| CN108199580A (en) * | 2018-02-11 | 2018-06-22 | 常州博能新能源有限公司 | Bidirectional DC/DC device and its control method |
| CN115436234A (en) * | 2022-09-05 | 2022-12-06 | 吉林大学 | Method for testing wettability evolution of induced diaphragm of continuous adjustable charging stress induction system |
| CN117728544A (en) * | 2024-02-07 | 2024-03-19 | 液流储能科技有限公司 | Direct current converging circuit and method for liquid flow energy storage new energy battery |
| CN117728544B (en) * | 2024-02-07 | 2024-05-14 | 液流储能科技有限公司 | Direct current converging circuit and method for liquid flow energy storage new energy battery |
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Application publication date: 20131211 |