CN102751776B - High-capacity reversible charging and discharging device - Google Patents
High-capacity reversible charging and discharging device Download PDFInfo
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- CN102751776B CN102751776B CN201210249173.8A CN201210249173A CN102751776B CN 102751776 B CN102751776 B CN 102751776B CN 201210249173 A CN201210249173 A CN 201210249173A CN 102751776 B CN102751776 B CN 102751776B
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Abstract
The invention provides a high-capacity reversible charging and discharging device which is characterized by comprising a reversible electric power storage and charge-discharge unit, a data display control unit, an insulation detection unit, a storage battery, a storage battery detection unit and an upper computer, wherein the reversible electric power storage and charge-discharge unit sequentially comprises a transformer, a space vector pulse width modulation (SVPWM) reversible three-phase rectifier inverter bridge, a digital signal processor (DSP) data controller and a two-way DC (direct current)/ DC conversion module used for converting charging and discharging modes; the reversible electric power storage and charge-discharge unit is led out from a high-voltage system bus; an output end of the reversible electric power storage and charge-discharge unit is connected with the storage battery; the data display control unit is respectively connected with the reversible electric power storage and charge-discharge unit, the insulation detection unit and the storage battery detection unit; the storage battery detection unit is connected with the storage battery by data; and the insulation detection unit is connected with an output end of the reversible electric power storage and charge-discharge unit. The reversible electric power storage and charge-discharge unit is added into the device, so that the device integrates reversible charging and discharging; therefore, the device can be used for rectifying charging and discharge inversion to realize grid-connected operation with the main power grid.
Description
Technical field
The present invention relates to a kind of charging-discharging device for accumulator battery, specifically a kind of high-capacity reversible charge and discharge device.
Background technology
At present, the battery charging plant on China naval vessel, by traditional Set Type DC power supply, is progressively replaced by the direct-current switch power supply of power electronics, and along with the raising of defence equipment automatization level, naval vessel battery charging plant also has significant progress.Naval vessel battery charge and discharge device present situation is as follows:
1. naval vessel battery charge and discharge device, general by direct-current switch power supply as charging device, ohmic load is as electric discharge device, and discharge energy does not reclaim and wastes, this contradiction on Small Vessel is not also given prominence to, however in, large ship will be the loss that can not be ignored.
2. the charging modes of naval vessel battery charge and discharge device and maintaining are also only limitted to constant current, constant voltage, floating charge, fill and the normal mode that discharges soon, the discharge and recharge of storage battery and maintaining can not be in self Optimization Work state.It reduce efficiency and the life-span of accumulator cell charging and discharging and maintaining, thus greatly reduce the integration capability of naval vessel Mechatronic Systems.
3. up to the present naval vessel battery charge and discharge device had not also had and had monitored the capacity of storage battery, and the detection of the capacity of storage battery the most effectively will reflect accumulator property and ruuning situation, also be the significant data of naval vessel war preparedness simultaneously, therefore should detect above-mentioned key parameter.
Finding thus, the reversible battery charge and discharge device in naval vessel improving ship survivability and operational performance seems particularly urgent and important.
In the battery charge and discharge device of large ship, realize High Power Factor, low harmony wave, high efficiency and discharge and recharge one, the reversible recovery of energy, be simultaneously the direction of battery charge and discharge device problem demanding prompt solution and development in the function such as real-time online assessment of intelligent recharge and discharge, reliability and vitality guarantee.Mainly contain:
(1). in discharge and recharge power supply, adopt the reversible rectifier Large Copacity Switching Power Supply possessing SVPWM technology as discharge and recharge power supply, be characterized in that discharge and recharge main circuit is integrally charging circuit, also be electric discharge inversion energy recovery circuit, make facility compact, improve device utilization rate, while realizing conventional discharge and recharge, also can provide pulse charging/discharging function.
(2). adopt to possess the while that SVPWM technology realizing High Power Factor, high efficiency and greatly improve and reduce Resonance Wave Composition, adopt the two close cycles of electric current and voltage both to ensure that discharge and recharge constant current, Isobarically Control stable state accuracy, also have good dynamic response performance.
(3). in ice storing time, adopt Distributed Autonomous sensing network, realize voltage, temperature, the internal resistance detection of single lattice storage battery, react storage battery health status better.
(4). on the basis in conjunction with single lattice ice storing time, realize the intelligent charge and discharge system that storage battery is in be optimized by itself operating state, and the real-time online assessment of generator reliability and vitality guarantee becomes possibility.
(5). fully demonstrate modularization, intellectuality in design, so that system flexible configurations.
For the demand of large ship battery charge and discharge device, develop one and realize reversible battery charge and discharge device: integrate charge and discharge function, both can be used as the rectification charging power supply of storage battery, realize storage battery constant current, constant voltage charge, can be used as again the inverter of battery discharging, energy feedback during storage battery deep discharge to electrical network.And in the process of storage battery charge and discharge, sine and High Power Factor, the low harmony wave that all can realize current on line side pollute, and energy-saving effect is remarkable, its value that utilization benefit improving equipment is had to sufficient realistic meaning and applies.
Summary of the invention
The present invention, in order to solve the technical problem mentioned in background technology, provides a kind of Large Copacity acid non-maintaining reversible charge and discharge device.
In order to realize above-mentioned technical purpose, the present invention by the following technical solutions:
A kind of high-capacity reversible charge and discharge device, it is characterized in that: this device comprises reversible electric power storage charge/discharge unit, data aobvious control unit, Insulation monitoring unit, batteries, ice storing time unit and host computer, described reversible electric power storage charge/discharge unit comprises transformer successively, the reversible three phase rectifier inverter bridge of SVPWM, DSP recording controller and the two-way DC/DC conversion module as charge and discharge mode conversion, described reversible electric power storage charge/discharge unit picks out from high voltage bus, the output of reversible electric power storage charge/discharge unit connects batteries, data aobvious control unit respectively with reversible electric power storage charge/discharge unit, Insulation monitoring unit and ice storing time cell data connect, ice storing time unit and batteries data cube computation, Insulation monitoring unit connects the output to reversible electric power storage charge/discharge unit, this device is also provided with time reversible electric power storage charge/discharge unit, secondary batteries and secondary ice storing time unit, described reversible electric power storage charge/discharge unit, secondary batteries and secondary ice storing time unit and reversible electric power storage charge/discharge unit, batteries and ice storing time cellular construction identical, described reversible electric power storage charge/discharge unit first connects internally bus, pass through K switch again
4connect to batteries, described time reversible electric power storage charge/discharge unit picks out from high voltage bus, and the output of secondary reversible electric power storage charge/discharge unit first connects internally bus, then passes through K switch
6connect to secondary batteries, the internal bus section between reversible electric power storage charge/discharge unit and secondary reversible electric power storage charge/discharge unit is provided with K switch
5, described ice storing time unit and time batteries data cube computation, described data aobvious control unit is connected with secondary reversible electric power storage charge/discharge unit and time ice storing time cell data in the same fashion with Insulation monitoring unit simultaneously, described two-way DC/DC conversion module mainly comprises charging IGBT, discharge IGBT and voltage detecting branch road, the positive output end serial connection charge IGBT of the reversible three phase rectifier inverter bridge of described SVPWM, the output parallel discharge IGBT again of the reversible three phase rectifier inverter bridge of SVPWM, then its output shunt voltage detection branch again, the positive output terminal tandem inductance L of two-way DC/DC conversion module
2to batteries, the negative output terminal tandem current sensor of two-way DC/DC conversion module is to batteries.
The reversible three phase rectifier inverter bridge of described SVPWM is composed in parallel between two by 6 IGBT, and the three-phase output end of described transformer is respectively through inductance L
1access the node between two IGBT, an output first large bulk capacitance C in parallel of the reversible three phase rectifier inverter bridge of described SVPWM, time voltage detecting branch road in parallel again, described DSP recording controller detects the signal of transformer output, voltage detecting branch road, secondary voltage detecting branch road and current sensor respectively, and DSP recording controller controls the reversible three phase rectifier inverter bridge of control SVPWM, charging IGBT and discharge IGBT action respectively.
Described DSP recording controller control unit be connected by CAN is aobvious with host computer and data respectively, and data show to be controlled unit and be connected with ice storing time unit and Insulation monitoring cell data.
Described voltage detecting branch road and time voltage detecting branch road are all be in series by a resistance and a voltage sensor.
Described data aobvious control unit adopts built-in touch monitoring panel computer, and described Insulation monitoring unit adopts 500V class of insulation alternating current-direct current on-line insulation monitoring alarm, and described ice storing time unit adopts explosion-proof intrinsic safety level distributed storage battery on-line measuring device.
Beneficial effect of the present invention is: the present invention adopts and adds reversible electric power storage charge/discharge unit, and the reversible discharge and recharge of the energy of this device is integrated, both rectifiable chargings, and also can discharge inversion and main electrical network are incorporated into the power networks; 2 charge/discharge units simultaneously arranged both can independent operating, also can parallel running, and device is equipped with data display monitoring unit, realizes man-machine interaction; With timer, there is fail safe multiple protection measure: inversion grid connection anti-" isolated island " detects off-grid protection, inlet wire open-phase protection, alternating current net side current detecting and overcurrent, short-circuit protection, VD detects and under-voltage/overvoltage protection, average anode current detect and overcurrent protection, insulation resistance detect and protection, overtemperature protection etc.
Accompanying drawing explanation
Fig. 1 is structure principle chart of the present invention;
Fig. 2 is the electrical schematic diagram of the reversible electric power storage charge/discharge unit of the present invention;
Two close cycles current phasor tracing control block diagram when Fig. 3 is charging rectifier of the present invention;
Fig. 4 be the present invention discharge inversion time two close cycles electric current and voltage vector tracking control block diagram;
Fig. 5 is the electrical schematic diagram that the two-way DC/DC of the present invention converts buck chopper charge in batteries;
Fig. 6 is the electrical schematic diagram that the two-way DC/DC of the present invention converts boost chopper battery discharging.
Embodiment
See Fig. 1, a kind of high-capacity reversible charge and discharge device, comprise reversible electric power storage charge/discharge unit, data aobvious control unit, Insulation monitoring unit, batteries, ice storing time unit and host computer, reversible electric power storage charge/discharge unit comprises transformer 1 successively, the reversible three phase rectifier inverter bridge 2 of SVPWM, DSP recording controller and the two-way DC/DC conversion module 3 as charge and discharge mode conversion, reversible electric power storage charge/discharge unit picks out from high voltage bus, the output of reversible electric power storage charge/discharge unit connects batteries, data aobvious control unit respectively with reversible electric power storage charge/discharge unit, Insulation monitoring unit and ice storing time cell data connect, ice storing time unit and batteries data cube computation, Insulation monitoring unit connects the output to reversible electric power storage charge/discharge unit, data aobvious control unit adopts built-in touch monitoring panel computer, Insulation monitoring unit adopts 500V class of insulation alternating current-direct current on-line insulation monitoring alarm, ice storing time unit adopts explosion-proof intrinsic safety level distributed storage battery on-line measuring device.
In order to increase redundancy, improve reliability, then the present invention can adopt following structure further:
Embodiment 1
See Fig. 1, a kind of high-capacity reversible charge and discharge device of this device, comprise reversible electric power storage charge/discharge unit, data aobvious control unit, Insulation monitoring unit, batteries, ice storing time unit and host computer, reversible electric power storage charge/discharge unit comprises transformer 1, SVPWM reversible three phase rectifier inverter bridge 2, DSP recording controller successively and is used as the two-way DC/DC conversion module 3 of charge and discharge mode conversion, reversible electric power storage charge/discharge unit picks out from high voltage bus, is provided with K switch between reversible electric power storage charge/discharge unit and high voltage bus
123, the output of reversible electric power storage charge/discharge unit connects batteries, meanwhile also be provided with time reversible electric power storage charge/discharge unit, secondary batteries and secondary ice storing time unit, secondary reversible electric power storage charge/discharge unit, secondary batteries and secondary ice storing time unit are identical with reversible electric power storage charge/discharge unit, batteries and ice storing time cellular construction, reversible electric power storage charge/discharge unit first connects internally bus, then passes through K switch
44 connect to batteries, and secondary reversible electric power storage charge/discharge unit picks out from high voltage bus, is provided with K switch between secondary reversible electric power storage charge/discharge unit and high voltage bus
224, the output of secondary reversible electric power storage charge/discharge unit first connects internally bus, then passes through K switch
65 connect to secondary batteries, and the internal bus section between reversible electric power storage charge/discharge unit and secondary reversible electric power storage charge/discharge unit is provided with K switch
56, secondary ice storing time unit and time batteries data cube computation, data aobvious control unit is connected with reversible electric power storage charge/discharge unit, Insulation monitoring unit and ice storing time cell data respectively, is provided with K switch between data aobvious control unit and high voltage bus
325, ice storing time unit and batteries data cube computation, Insulation monitoring unit connects the output to reversible electric power storage charge/discharge unit, and data aobvious control unit is connected with secondary reversible electric power storage charge/discharge unit and time ice storing time cell data in the same fashion with Insulation monitoring unit simultaneously.
Operation principle of the present invention:
1) according to technical scheme above and embodiment, then the present invention's table apparatus in configuration joins two charge/discharge units, can be two group storage batteries and charges respectively, can parallel connection be also a group storage battery charging simultaneously, work as K switch
44, K
65 close, K switch
5during 6 disconnection, two independent corresponding group storage battery groups of charge/discharge unit are powered, and pass through K
44, K
56, K
65 switch, for subsequent use each other, increase redundancy, improve reliability; Meanwhile, can it be powered, to meet the requirement of high current capacity two table apparatus parallel connections when a group storage battery needs fast charging and discharging; Work as K switch
5before closed, K switch
4, K
6can not close simultaneously, realize K switch by interlocking
5time closed, K switch
4, K
6can only close on a road, only a wherein group storage battery group is powered when guaranteeing parallel connection.
2) on networking composition, every platform charge and discharge device supported data incoming communication interface, be connected with the distributed storage battery detecting unit communication that can match, to detect the voltage of cell batteries, temperature and internal resistance (capacity), provide auto-compensation intelligent recharge and discharge and battery capacity monitoring function; Support CAN network insertion, load sharing when realizing 2 charge/discharge units parallel connections controls simultaneously; There is provided communication interface simultaneously so as with master system networking.
3) functionally, charge and discharge device is that the reversible discharge and recharge of energy is integrated, both rectifiable chargings, and also can discharge inversion and main electrical network are incorporated into the power networks; 2 built-in charge/discharge units both can independent operating, also can parallel running.Device is equipped with data display monitoring unit, realizes man-machine interaction.With timer, there is fail safe multiple protection measure: inversion grid connection anti-" isolated island " detects off-grid protection, inlet wire open-phase protection, alternating current net side current detecting and overcurrent, short-circuit protection, VD detects and under-voltage/overvoltage protection, average anode current detect and overcurrent protection, insulation resistance detect and protection, overtemperature protection etc.
4) data aobvious control unit: the display that charge and discharge device and the display of storage battery operating condition and fault alarm thereof are provided, support that touching input provides setup parameter to arrange, revises and lock-related operations, realize man-machine interaction, insulating monitoring unit: provide bus, direct current outlet cable insulation-monitoring function.
Reversible electric power storage charge/discharge unit: the core cell being charge and discharge device, charge/discharge unit has current limliting constant voltage charge/discharge operation mode, 2 unit for subsequent usely and in parallel each other can use the mode of operation realizing fast charging and discharging simultaneously, the charge/discharge capacity of 0.1C-0.2C is provided, while realizing quick charge, solve the depolarising problem of batteries, improve the availability of batteries.Charge and discharge device, can realize energy regenerating during batteries deep discharge well, and improve the service efficiency of the energy, concrete reversible electric power storage charge/discharge unit structure is as follows: see the reversible three phase rectifier inverter bridge of Fig. 2, SVPWM by 6 IGBT12; 13; 14; 15; 16; 17 compose in parallel between two, and the three-phase output end of transformer is respectively through inductance L
1node between 18 accesses, two IGBT, an output first large bulk capacitance C19 in parallel of the reversible three phase rectifier inverter bridge 2 of SVPWM, time voltage detecting branch road 20 in parallel again, two-way DC/DC conversion module 3 mainly comprises charging IGBT7, discharge IGBT 8 and voltage detecting branch road 10, the positive output end serial connection charge IGBT7 of the reversible three phase rectifier inverter bridge 2 of SVPWM, the output parallel discharge IGBT8 again of the reversible three phase rectifier inverter bridge 2 of SVPWM, then its output shunt voltage detection branch 10 again, the positive output terminal tandem inductance L of two-way DC/DC conversion module 3
29 to batteries, the negative output terminal tandem current sensor 11 of two-way DC/DC conversion module 3 is to batteries, DSP recording controller detects the signal of transformer 1 output, voltage detecting branch road 10, secondary voltage detecting branch road 20 and current sensor 11 respectively, and DSP recording controller controls the reversible three phase rectifier inverter bridge 2 of control SVPWM, charging IGBT7 and discharge IGBT 8 action respectively.DSP recording controller control unit be connected by CAN is aobvious with host computer and data respectively, and data show to be controlled unit and be connected with ice storing time unit and Insulation monitoring cell data.Voltage detecting branch road 10 and time voltage detecting branch road 20 are all be in series by a resistance 21 and a voltage sensor 22.
According to technical scheme above, at battery data aobvious control unit, structure composition its main hardware aspect upper of discharge and recharge energy conversion pattern comprehensively adopts the army grade computer for controlling composition data aobvious control man-machine interface based on extensive use, and based on the charge and discharge device of High Performance DSP to be control core and high power density IGBT be power switch forms discharge and recharge one, match battery data collecting unit simultaneously, charge and discharge device can carry out auto-compensation intelligent recharge and discharge and capacity monitoring assessment to batteries, and realize for subsequent use each other of batteries in emergency circumstances and relevant device, principle simultaneously in conjunction with comprehensive utilization of energy regularly to be discharged maintaining to batteries, can show in real time apparatus system work condition state and malfunction monitoring warning, the measure of ice storing time autocompensation charging, ice storing time is the key effectively realizing storage battery auto-compensation intelligent recharge and discharge and battery capacity monitoring, optional partition cloth ice storing time unit for this reason, to monitor the voltage of cell batteries, temperature and internal resistance, and detect the voltage and current of batteries, charge and discharge device is accessed by communication interface, require that distributed storage battery detecting unit is on the basis that intrinsic safety explosion-proof designs, adopt the filling or Flameproof shell of epoxy resin, sealing joint connects, improve the grade of Explosion-proof Design, ensure reliability and security.
The operation principle of the reversible electric power storage charge/discharge unit of the present invention: charge/discharge unit is made up of main circuit, control circuit.Employing is that the reversible three phase rectifier inverter bridge 2 of device for power switching forms main circuit with IGBT, adopts the voltage of DSP implementation space Vector Pulse Width Modulation SVPWM, current double closed-loop to control intelligent control circuit.Reversible three phase rectifier inverter bridge both also realized while the two-way change of energy send as inverter bridge as rectifier bridge, by the CAN communication interface of DSP, some key parameters of reversible module and various fault-signal are detected and sends data aobvious control unit to, simultaneously data show control unit some parameter is set under pass to DSP, realize man-machine interaction, specifically can be divided into following two kinds of situations:
1) during charging, DC voltage-stabilizing exports control
See Fig. 3, during charging, energy flows to storage battery by electrical network, reversible three phase rectifier inverter bridge 2 DC voltage-stabilizing exports, two close cycles current phasor tracing control block diagram as shown in Figure 3, specific implementation process is as follows: the three-phase input current detected, through 3/2 conversion and rotation transformation, obtains real component Id (DC quantity) and the idle component Iq (DC quantity) of electric current.The output of Voltage loop is as active current set-point Id*, and reactive current component set-point Iq* is zero.Adopt Feedforward Decoupling strategy, after adding decoupling zero link, two current inner loop regulate through PI after computing, form AC modulation voltage again dq component upd*, upq*, then convert to obtain three-phase alternating current side modulation voltage set-point upa*, upb*, upc* through rotation transformation and 2/3, obtain the drive singal of three-phase rectifier finally by PWM circuit;
2) grid-connected tracing control during electric discharge
Relative generate output at least reaches the main electrical network of 1600KW, the electric discharge inversion of 66KW charge and discharge device adopts direct grid-connected to run, see Fig. 4, during electric discharge, energy flows to electrical network by storage battery, reversible three phase rectifier inverter bridge inversion grid connection runs to exchange follows the tracks of main electrical network voltage stabilizing output, and two close cycles electric current and voltage vector tracking control block diagram as shown in Figure 4.Specific implementation process is as follows: the three-phase voltage detected is through 3/2 conversion and rotation transformation, obtain the real component Ud* (DC quantity) of voltage for track reference value and idle component Uq (DC quantity) are as value of feedback, reactive voltage component set-point Uq*=0, the three-phase current simultaneously detected, through 3/2 conversion and rotation transformation, obtains real component Id (DC quantity) and the idle component Iq (DC quantity) of electric current.The output of Voltage loop as active current set-point Id*, reactive current component set-point Iq*.Adopt Feedforward Decoupling strategy, after adding decoupling zero link, two current inner loop regulate through PI after computing, form AC modulation voltage again dq component upd*, upq*, then convert to obtain three-phase alternating current side modulation voltage set-point upa*, upb*, upc* through rotation transformation and 2/3, obtain the drive singal of three-phase rectifier finally by PWM circuit.
Double-closed-loop control method control precision is higher, not only can accurately floating voltage, current-order when stable state, realize floating, and dynamic property is also better.Therefore, there is the reversible module of space vector SVPWM commute contrary change bridge there is following characteristics:
A. have bidirectional reversible DC voltage-stabilizing, both rectifiable was charged also possibility of reversal feedback, adopted outer shroud voltage close loop to control to make DC voltage voltage stabilizing;
B. there is High Power Factor and high efficiency, adopt reactive current to be given as the instruction trace compensatory control of zero, make to be that rectification or inversion all have high power factor and high efficiency;
C. there is ground harmonic component, adopt space vector SVPWM pulse-width modulation, and adopt reactive current to be given as the instruction trace compensatory control of zero, effectively can reduce the Resonance Wave Composition of net side alternating voltage.
Meanwhile the present invention instead " isolated island " can detect automatic off-grid, island effect refers to when main electrical network is due to reason interruption of power supply such as electric fault, misoperation or natural causes, the inverter be incorporated into the power networks fails immediately detect power down mode and depart from electrical network, the self-energizing isolated island that the electrical network that the load of inversion system and surrounding is formed cannot be grasped.Island phenomenon can have a strong impact on the normal operation of safety of network system.Severest consequences are the personal safety that possible jeopardize line maintenance personnel." isolated island " detects point passive type detection method and an active detection method.When passive type method utilizes grid cut-off, island effect detection is carried out in the change of inverter output end voltage, frequency, phase place or harmonic wave.But when inverter power output and partial load power-balance, then passive type detection method will lose island effect detectability, there is larger non-surveyed area (Non-Detection Zone is called for short NDZ).The passive type anti-islanding scheme of combining inverter adopts the automatic network disconnecting device of company's maturation, improves the fail safe of being incorporated into the power networks.Active alone island detection method is by control inverter, makes its power output, frequency or phase place there is certain disturbance.When electrical network normally works, due to the balanced action of electrical network, can't detect these disturbances.Once electrical grid failure, accelerated accumulation is exceeded allowed band by the disturbance that inverter exports, thus triggers island effect testing circuit.The anti-islanding strategy of current combining inverter all adopts passive type to detect to add a kind of active detection to combine scheme." isolated island " detects based on passive detection method, and active detecting method is auxiliary.Namely passive detection adopted/under voltage and high/low frequency detecting method are when the voltage magnitude of point of common coupling and frequency overrun, the automatic off-grid of inverter.And active detecting adopts frequency offset detection method (Active Frequency Drift, AFD) to be current a kind of common active disturbance detecting method.Adopt active frequency displacement scheme to make the electric current of its combining inverter output frequency distortion slightly, to form the trend that one continuously changes frequency, finally cause the boundary value of output voltage and the protection of electric current overfrequency, thus reach the object of anti-islanding effect.
In order to explain core technology scheme of the present invention further, i.e. two-way DC/DC conversion module, two-way DC/DC conversion module is as shown in Figure 2 when charge and discharge device carries out constant current charge to storage battery, during electric discharge, the charging voltage of storage battery and the output dc voltage Uo of charge and discharge device are changes, and the output dc voltage Ud of SVPWM rectification adverser 2 is that fixing (SVPWM rectification adverser is a booster converter, its output voltage Ud can only toward raising on 1.5e2 basis, can not lower, its output voltage of usual control is a constant voltage), so DC/DC translation circuit must be increased, by the direct voltage Uo that fixing Ud furnishing is expected.Reversible battery charge and discharge device can adopt unified DC power supply (i.e. the direct voltage of SVPWM rectification adverser output), and the two-way DC/DC converter of heel, realizes the reversible discharge and recharge to storage battery, and its concrete principle is explained as follows:
1) buck circuit
See Fig. 5, buck circuit realizes the function to charge in batteries, its schematic diagram as shown in Figure 5 to form buck circuit (Buck Chopper) by V7 charging IGBT switch, VD8 fly-wheel diode and reactor L2, namely its charging process is: when V7 opens, Ud charges to storage battery E through reactor L2, now L2 place energy storage state; When V7 turns off, L2 continues to charge to storage battery E through VD8 releasing energy, and current direction is with reference to the direction of arrow in figure 5, and therefore L2 is also smoothing reactor, and it is not interrupted that its inductance value parameter value should meet charging current;
2) boost chopper
See Fig. 6, boost chopper realizes the function by battery discharging, its schematic diagram as shown in Figure 6 to form boost chopper (Boost Chopper) by V8 charging IGBT switch, VD7 fly-wheel diode and reactor L2, namely its discharge process is: when V8 opens, storage battery E discharges through reactor L2, now L2 place energy storage state; When V8 turns off, L2 boosts to the electric capacity C energy storage of Ud together with storage battery through VD7 releasing energy, and storage battery E continues electric discharge, and current direction is with reference to the direction of arrow in figure 7.Same L2 is also smoothing reactor, and it is not interrupted that its inductance value parameter value should meet discharging current.
The present invention needs the discharge and recharge being carried out reversible charge/discharge unit by the driving of DSP recording controller to switch:
1) reversible charge/discharge unit switches to discharge condition by charged state
Reversible DC/DC switches to discharge condition by charged state, and the reversible bridge of three-phase seamlessly switches to inverter mode by rectification under the phase locked condition of electric voltage frequency, and double-closed-loop control pattern is controlled to switch to exchange by DC voltage-stabilizing follows the tracks of voltage stabilizing;
2) reversible charge/discharge unit switches to charged state by discharge condition
Reversible DC/DC switches to charged state by discharge condition, and the reversible bridge of three-phase seamlessly switches to rectification state by inversion under the phase locked condition of electric voltage frequency, and double-closed-loop control pattern switches to DC voltage-stabilizing by alternating voltage tracing control.
Claims (4)
1. a high-capacity reversible charge and discharge device, it is characterized in that: this device comprises reversible electric power storage charge/discharge unit, data aobvious control unit, Insulation monitoring unit, batteries, ice storing time unit and host computer, described reversible electric power storage charge/discharge unit comprises transformer (1) successively, the reversible three phase rectifier inverter bridge (2) of SVPWM, DSP recording controller and the two-way DC/DC conversion module (3) as charge and discharge mode conversion, described reversible electric power storage charge/discharge unit picks out from high voltage bus, the output of reversible electric power storage charge/discharge unit connects batteries, data aobvious control unit respectively with reversible electric power storage charge/discharge unit, Insulation monitoring unit and ice storing time cell data connect, ice storing time unit and batteries data cube computation, Insulation monitoring unit connects the output to reversible electric power storage charge/discharge unit, this device is also provided with time reversible electric power storage charge/discharge unit, secondary batteries and secondary ice storing time unit, described reversible electric power storage charge/discharge unit, secondary batteries and secondary ice storing time unit and reversible electric power storage charge/discharge unit, batteries and ice storing time cellular construction identical, described reversible electric power storage charge/discharge unit first connects internally bus, connected to batteries by K switch 4 (4) again, described time reversible electric power storage charge/discharge unit picks out from high voltage bus, the output of secondary reversible electric power storage charge/discharge unit first connects internally bus, connected to secondary batteries by K switch 6 (5) again, internal bus section between reversible electric power storage charge/discharge unit and secondary reversible electric power storage charge/discharge unit is provided with K switch 5 (6), described ice storing time unit and time batteries data cube computation, described data aobvious control unit is connected with secondary reversible electric power storage charge/discharge unit and time ice storing time cell data in the same fashion with Insulation monitoring unit simultaneously, described two-way DC/DC conversion module mainly comprises charging IGBT (7), discharge IGBT (8) and voltage detecting branch road (10), the positive output end serial connection charge IGBT (7) of the reversible three phase rectifier inverter bridge (2) of described SVPWM, the output parallel discharge IGBT (8) again of the reversible three phase rectifier inverter bridge (2) of SVPWM, then its output shunt voltage detection branch (10) again, the positive output terminal tandem inductance L 2 (9) of two-way DC/DC conversion module (3) is to batteries, the negative output terminal tandem current sensor (11) of two-way DC/DC conversion module (3) is to batteries, the reversible three phase rectifier inverter bridge (2) of described SVPWM is by 6 IGBT (12, 13, 14, 15, 16, 17) compose in parallel between two, the three-phase output end of described transformer (1) is respectively through the node between inductance L 1 (18) access two IGBT, an output first large bulk capacitance C (19) in parallel of the reversible three phase rectifier inverter bridge (2) of described SVPWM, time voltage detecting branch road (20) in parallel again, described DSP recording controller detects transformer (1) output respectively, voltage detecting branch road (10), the signal of secondary voltage detecting branch road (20) and current sensor (11), DSP recording controller controls the reversible three phase rectifier inverter bridge (2) of control SVPWM respectively, charging IGBT (7) and discharge IGBT (8) action.
2. a kind of high-capacity reversible charge and discharge device according to claim 1, it is characterized in that: described DSP recording controller control unit be connected by CAN is aobvious with host computer and data respectively, data show to be controlled unit and is connected with ice storing time unit and Insulation monitoring cell data.
3. a kind of high-capacity reversible charge and discharge device according to claim 3, is characterized in that: described voltage detecting branch road (10) and time voltage detecting branch road (20) are all be in series by a resistance (21) and a voltage sensor (22).
4. a kind of high-capacity reversible charge and discharge device according to claim 1, it is characterized in that: described data aobvious control unit adopts built-in touch monitoring panel computer, described Insulation monitoring unit adopts 500V class of insulation alternating current-direct current on-line insulation monitoring alarm, and described ice storing time unit adopts explosion-proof intrinsic safety level distributed storage battery on-line measuring device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210249173.8A CN102751776B (en) | 2012-07-17 | 2012-07-17 | High-capacity reversible charging and discharging device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210249173.8A CN102751776B (en) | 2012-07-17 | 2012-07-17 | High-capacity reversible charging and discharging device |
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| CN102751776A CN102751776A (en) | 2012-10-24 |
| CN102751776B true CN102751776B (en) | 2015-01-21 |
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| CN105743085B (en) * | 2014-12-12 | 2019-11-26 | 通用电气公司 | To the system and method for at least one load supplying |
| CN106329664A (en) * | 2016-10-20 | 2017-01-11 | 北京正合盛技术有限公司 | Charge-discharge device jointly used by multiple storage battery |
| CN109103975B (en) * | 2018-09-20 | 2024-03-26 | 江苏为恒智能科技有限公司 | Battery bidirectional charging and discharging equipment with insulation detection function |
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| CN113162185A (en) * | 2021-04-30 | 2021-07-23 | 中国人民解放军海军潜艇学院 | Bidirectional charge and discharge system of MW-level storage battery pack |
| CN114336857A (en) * | 2021-12-30 | 2022-04-12 | 深圳市沃特沃德信息有限公司 | Conversion circuit for series charging and parallel power supply |
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