CN110518610A - A kind of device controlling the charge and discharge of novel energy storage cell group - Google Patents
A kind of device controlling the charge and discharge of novel energy storage cell group Download PDFInfo
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- CN110518610A CN110518610A CN201910808033.1A CN201910808033A CN110518610A CN 110518610 A CN110518610 A CN 110518610A CN 201910808033 A CN201910808033 A CN 201910808033A CN 110518610 A CN110518610 A CN 110518610A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of devices for controlling the charge and discharge of novel energy storage cell group, it is the important component that power quality multiple target comprehensive treatment device is pressed in constituting, when voltage dip occurs for power grid, the device of the novel novel energy storage cell group charge and discharge can be large current discharge by power diode zero propagation, normal power supply of the realization device to load；When network voltage is normal, the control of the active low current management of charging and discharging to energy-storage battery group is may be implemented in the device of the novel energy storage cell group charge and discharge again, guarantees the work of the safe and efficient health of energy-storage battery group.
Description
Technical field
The invention belongs to the control technology fields of multifunctional electric power device, more specifically, are related to a kind of control
The device of novel energy storage cell group charge and discharge.
Background technique
In recent years, country carries forward vigorously smart grid and the construction of ubiquitous electric power Internet of Things, to power grid security and stability, intelligence
Interactivity etc. proposes requirement for height.Power distribution network is directly facing last one of critical point of client as company, reliability,
Intelligent development is horizontal, directly determines the sense of access of client's energy.However, the rack of power grid distribution at present is more weak, equipment
Configuration level is not generally high, the potentially large number of valence obtained for devices such as distribution transforming intelligent terminal, fault detector, monitoring sensors
Value Data is difficult to effectively be applied.Therefore, the problems such as user side failure power loss, low-voltage, harmonic pollution, three-phase imbalance, begins
It is difficult to eradicate eventually.Especially in the sensitive electrical domain such as urban electricity supply region, and medical treatment, scientific research, education, government bodies, on
It is increasing to state the influence of problem bring.Demand of the user to polymorphic type power quality harnessed synthetically is realized is increasingly strong, therefore
Installation power quality controlling device is the important means for improving power system stability service ability.
In general, by controllable voltage source of connecting between system power supply and sensitive load, to be interrupted in supply voltage
In the case where being unsatisfactory for national standard with power quality, ideal sinusoidal voltage is provided to sensitive load, final realize powers to load
The comprehensive treatment of voltage.It based on H bridge cascade multi-level converter is formed by the direct overlapped in series of prime power unit module
A kind of tandem type circuit topological structure be easy to extend, Redundant Control because having many advantages, such as that high-efficient, response is fast, modularization,
Just it is used widely in terms of power quality controlling.
The prime power unit module of existing tandem type converter, topological structure is generally by three-phase uncontrollable rectifier bridge, straight
Flow bus capacitor, H bridge inverter unit composition.This power cell topological structure, therefore can not be in electricity because not having energy storage component
Continuous power supply is provided to load when temporarily drop and voltage interruption occurs in net voltage.Therefore, in view of the above-mentioned problems, the invention proposes one
Kind novel energy-storage battery group charge/discharge unit and its control method.On the basis of prime power unit module, increase energy storage electricity
Pond group and novel charge/discharge unit can be realized when temporarily drop and voltage interruption occurs in network voltage to the uninterrupted of load
Continuous power supply.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of control novel energy storage cell group charge and discharge
Device can maintain DC bus-bar voltage by discharging energy-storage battery group when temporarily drop and voltage interruption occurs in network voltage
It is constant, so that eliminating network voltage temporarily drops influence to load, secondly, when network voltage is normal, it can be to energy-storage battery group
Small-power charging is carried out, to guarantee the reliable and stable operation of power quality controlling device.
For achieving the above object, a kind of device for controlling the charge and discharge of novel energy storage cell group of the present invention, feature exist
In, comprising: energy-storage battery group, the first DC fuse, the second DC fuse, main contactor, absorption resistance, the first auxiliary contact
Device, charging resistor, capacitance-resistance resistor, power diode, the second auxiliary contactor, the first IGBT, filter inductance, thin-film capacitor, second
IGBT, Absorption Capacitance and controller unit；
The one end of the high-pressure side DCDC anode respectively with the cathode terminal of power diode and the second auxiliary contactor is connected
Connect, DCDC cathode respectively with one end of the second DC fuse, one end of capacitance-resistance resistor, one end of thin-film capacitor, the 2nd IGBT
One end and Absorption Capacitance one end connection；
The anode tap of the power diode auxiliary is contacted with one end of main contactor, one end of absorption resistance, first respectively
One end of device and one end of charging resistor are attached；
The other end of the main contactor is carried out with the other end of one end of the first DC fuse and absorption resistance respectively
Connection；
The other end of first DC fuse and one end of energy-storage battery group are attached, and energy-storage battery group is another
One end and the other end of the second DC fuse are attached；
The other end of first auxiliary contactor respectively with the other end of charging resistor, the other end of capacitance-resistance resistor, film
The other end of capacitor and one end of filter inductance are attached；
The other end of the other end of the filter inductance respectively with one end of the first IGBT and the 2nd IGBT is attached；
The other end of second auxiliary contactor is carried out with the other end of the other end of the first IGBT and Absorption Capacitance respectively
Connection；
The controller unit control with the control terminal of the first IGBT and the 2nd IGBT and each main and auxiliary contactor respectively
End connection processed；
Control the process of novel energy storage cell group charge and discharge are as follows:
Firstly, device initialization powers on: the killer switch inside manual closing energy-storage battery group, controller unit control
Main contactor is closed, at this time energy-storage battery group, the first DC fuse, main contactor, charging resistor, capacitance-resistance resistor, thin-film electro
Hold the conducting circuit constituted with the second DC fuse, charges to thin-film capacitor；After thin-film capacitor charging complete, control
Device unit controls the first auxiliary contactor closure, at this time energy-storage battery group, the first DC fuse, main contactor, the first auxiliary contact
The conducting circuit that device, capacitance-resistance resistor, thin-film capacitor and the second DC fuse are constituted, the initialized power up process of finishing device；
Secondly, unit state acquire: after the completion of device initialization powers on, voltage sensor obtain the high-pressure side DCDC anode with
The voltage of DCDC cathode, is denoted as: Udc；By energy-storage battery group carry battery management system obtain energy-storage battery group voltage and
Capacity is denoted as respectively: UbessAnd SOC；
Finally, device controls the charge and discharge of energy-storage battery group:
Work as UdcLess than UbessWhen, at this time power diode be connected, energy-storage battery group, the first DC fuse, main contactor,
The conducting circuit that power diode, the high-pressure side DCDC anode, DCDC cathode and the second DC fuse are constituted, energy-storage battery group are opened
Begin passively to discharge；
Work as UdcMore than or equal to Ubess, and SOC be less than energy-storage battery pool-size 50% when, controller unit control first
IGBT work is charged by the high-pressure side DCDC anode and cathode to energy-storage battery group, and there are two circuit alternate conductions at this time: circuit
1: energy-storage battery group, the first DC fuse, main contactor, the first auxiliary contactor, filter inductance, the first IGBT, second auxiliary connect
The conducting circuit that tentaculum, the high-pressure side DCDC anode, DCDC cathode and the second DC fuse are constituted, charges for energy-storage battery group；
Circuit 2: energy-storage battery group, the first DC fuse, main contactor, the first auxiliary contactor, filter inductance, two in the 2nd IGBT
The conducting circuit that pole pipe and DC fuse are constituted, charges for energy-storage battery group；The turn-on time in two circuits is according to actual circuit
Operating condition is arranged automatically by controller unit；When SOC is more than or equal to the 90% of energy-storage battery pool-size, controller unit
It controls the first IGBT to stop working, to terminate the charging process of energy-storage battery group；
Work as UdcMore than or equal to Ubess, and SOC be greater than energy-storage battery pool-size 90% when, controller unit itself starts to count
When, the time is denoted as T, if T is more than or equal to threshold value N, N is integer, and controller unit controls the 2nd IGBT work, gives energy storage electricity
Pond group electric discharge, at this time also there are two circuit alternate conduction: circuit 1: energy-storage battery group, the first DC fuse, main contactor, the
The conducting circuit that one auxiliary contactor, filter inductance, the 2nd IGBT and the second DC fuse are constituted is discharged for energy-storage battery group；
Circuit 2: energy-storage battery group, the first DC fuse, main contactor, the first auxiliary contactor, filter inductance, two in the first IGBT
The conducting circuit that pole pipe, the high-pressure side DCDC anode, DCDC cathode and the second DC fuse are constituted, discharges for energy-storage battery group；
The turn-on time in two circuits is arranged automatically according to actual circuit operating condition, by controller unit；When SOC is less than energy-storage battery group
Capacity 50% when, controller unit control the 2nd IGBT stop working, to terminate the discharge process of energy-storage battery group.
Goal of the invention of the invention is achieved in that
A kind of device for controlling the charge and discharge of novel energy storage cell group of the present invention is that pressure power quality multiple target is comprehensive in constituting
The important component of controlling device, when voltage dip occurs for power grid, the dress of the novel novel energy storage cell group charge and discharge
Setting can be large current discharge by power diode zero propagation, normal power supply of the realization device to load；It is normal in network voltage
When, the active low current management of charging and discharging control to energy-storage battery group may be implemented in the device of the novel energy storage cell group charge and discharge again
System guarantees the work of the safe and efficient health of energy-storage battery group.
Meanwhile a kind of device for controlling the charge and discharge of novel energy storage cell group of the present invention also has the advantages that
(1), there is voltage dip in network voltage, when power cell DC bus-bar voltage being caused to reduce, pass through power two
Pole pipe may be implemented energy-storage battery group and be large current discharge to the zero propagation of DC bus-bar voltage, while maintain DC bus-bar voltage permanent
It is fixed, normal power supply of the holding meanss to load.
(2), when network voltage is normal, if there is not voltage dip for a long time in network voltage, in order to extend battery
In the group service life, device needs to realize active management of charging and discharging to energy-storage battery group, due to the charge and discharge of energy-storage battery group in the present invention
The very little that electric current can be controlled, therefore the power device of energy-storage battery group charge/discharge unit can choose very little, so as to
Power cell integral device cost is saved, and reduces power cell volume.
(3), the present invention devises capacitance-resistance resistor, by that by connecting with casing, can eliminate the GND in capacitance-resistance resistor
The suspended voltage of casing reduces design of the positive and negative busbar to the casing class of insulation, inhibits energy-storage battery group charge/discharge unit over the ground
Common-mode voltage.
(4), the present invention devises charging resistor, can realize precharge for thin-film capacitor, prevent auxiliary contactor 1 from directly closing
Caused by impact.
(5), the present invention devises absorption resistance, and the overvoltage impact that main contactor combined floodgate generates can be absorbed.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of device for controlling the charge and discharge of novel energy storage cell group of the present invention；
Fig. 2 is a kind of connection figure of the device for controlling the charge and discharge of novel energy storage cell group and H bridge inverter unit of the present invention；
Fig. 3 is the single unit system system diagram built-up by device of the present invention.
Specific embodiment
A specific embodiment of the invention is described with reference to the accompanying drawing, preferably so as to those skilled in the art
Understand the present invention.Requiring particular attention is that in the following description, when known function and the detailed description of design perhaps
When can desalinate main contents of the invention, these descriptions will be ignored herein.
Embodiment
Fig. 1 is a kind of schematic diagram of device for controlling the charge and discharge of novel energy storage cell group of the present invention.
In the present embodiment, as shown in Figure 1, the present invention it is a kind of control the charge and discharge of novel energy storage cell group device, mainly
It include: energy-storage battery group, DC fuse 1, DC fuse 2, main contactor, absorption resistance, auxiliary contactor 1, charging electricity
Resistance, capacitance-resistance resistor, power diode, auxiliary contactor 2, IGBT1, filter inductance, thin-film capacitor, IGBT2, Absorption Capacitance and control
Device unit processed.
Wherein, one end of the cathode terminal and auxiliary contactor 2 of the high-pressure side DCDC anode and power diode is attached；Function
The anode tap of rate diode and one end of main contactor, one end of absorption resistance, one end of auxiliary contactor 1 and charging resistor
One end be attached；The other end of main contactor is attached with one end of DC fuse 1 and the other end of absorption resistance；
The other end of DC fuse 1 and one end of energy-storage battery group are attached, the other end and DC fuse 2 of energy-storage battery group
One end be attached；The other end of DC fuse 2 and one end of capacitance-resistance resistor, one end of thin-film capacitor, IGBT2 one
End, one end of Absorption Capacitance and DCDC cathode are attached；Capacitance-resistance resistor can directly be connect with casing when being grounded GND, can
To eliminate the suspended voltage of casing；The other end of auxiliary contactor 1 and the other end of charging resistor, capacitance-resistance resistor the other end,
The other end of thin-film capacitor and one end of filter inductance are attached；, the other end of filter inductance and one end of IGBT1 and
The other end of IGBT2 is attached；The other end of the other end of auxiliary contactor 2 and the other end of IGBT1 and Absorption Capacitance into
Row connection；Controller unit is connect with the control terminal of the control terminal of IGBT1 and IGBT2 and each main and auxiliary contactor；
The process that we carry out control novel energy storage cell group charge and discharge to the device below is described in detail, and control is new
The process of type energy-storage battery group charge and discharge mainly includes initialized power up, four passive electric discharge, active charge and active discharge mistakes
Journey, and each process constitutes different conducting circuits in whole device, and then to complete corresponding process.So four conductings
Circuit specifically:
Initialized power up circuit
Killer switch in manual closing energy-storage battery group, controller unit control main contactor closure, at this time energy storage
The conducting that battery pack, DC fuse 1, main contactor, charging resistor, capacitance-resistance resistor, thin-film capacitor, DC fuse 2 are constituted
Circuit charges to thin-film capacitor；After thin-film capacitor charging complete, controller unit controls auxiliary contactor 1 and is closed,
Energy-storage battery group, DC fuse 1, main contactor, auxiliary contactor 1, capacitance-resistance resistor, thin-film capacitor, 2 structure of DC fuse at this time
At conducting circuit, the initialized power up process of finishing device.
It after the completion of device initialization powers on, before excess-three state starts, needs first to be acquired the state of device, have
Body are as follows: voltage sensor obtains the voltage of the high-pressure side DCDC anode and DCDC cathode, is denoted as: Udc；It is included by energy-storage battery group
Battery management system obtain energy-storage battery group voltage and capacity, be denoted as respectively: UbessAnd SOC；
Passive discharge loop
Work as UdcLess than UbessWhen, power diode is connected at this time, energy-storage battery group, DC fuse 1, main contactor, function
The conducting circuit that rate diode, the high-pressure side DCDC anode, DCDC cathode, DC fuse 2 are constituted, energy-storage battery group start passively
Electric discharge；
Active charge circuit
Work as UdcMore than or equal to Ubess, and SOC be less than energy-storage battery pool-size 50% when, controller unit control IGBT1
Work charges to energy-storage battery group, there is 2 circuit alternate conductions at this time:
Circuit 1: energy-storage battery group, DC fuse 1, main contactor, auxiliary contactor 1, filter inductance, IGBT1, auxiliary contact
The conducting circuit that device 2, the high-pressure side DCDC anode, DCDC cathode, DC fuse 2 are constituted, charges for energy-storage battery group；
Circuit 2: energy-storage battery group, DC fuse 1, main contactor, auxiliary contactor 1, filter inductance, two in IGBT2
The conducting circuit that pole pipe, DC fuse 2 are constituted, charges for energy-storage battery group；
The turn-on time in two circuits is arranged automatically according to actual circuit operating condition, by controller unit；
When SOC is more than or equal to the 90% of energy-storage battery pool-size, controller unit control IGBT1 does not work, and terminates storage
It can battery pack charging；
Active discharge circuit
Work as UdcMore than or equal to Ubess, and SOC be greater than energy-storage battery pool-size 90% when, controller unit starts timing,
Time is denoted as T, if T is more than or equal to N, N is an integer (such as: accumulative timing is more than 30 days), and controller unit controls IGBT2 work
Make, discharges to energy-storage battery group, there are 2 circuit alternate conductions: circuit 1: energy-storage battery group, DC fuse 1, main contact at this time
The conducting circuit that device, auxiliary contactor 1, filter inductance, IGBT2, DC fuse 2 are constituted, discharges for energy-storage battery group；
Circuit 2: energy-storage battery group, DC fuse 1, main contactor, auxiliary contactor 1, filter inductance, two in IGBT1
The conducting circuit that pole pipe, the high-pressure side DCDC anode, DCDC cathode, DC fuse 2 are constituted, discharges for energy-storage battery group；
The turn-on time in two circuits is arranged automatically according to actual circuit operating condition, by controller unit；
When SOC is less than the 50% of energy-storage battery pool-size, controller unit control IGBT2 does not work, and terminates energy storage electricity
The electric discharge of pond group.
In the present embodiment, as shown in Fig. 2, it is novel energy storage cell group charge and discharge device of the present invention and H bridge is inverse
Become the connection of unit, wherein the high-pressure side DCDC anode is connect with the anode of H bridge inverter unit dc-link capacitance, DCDC cathode
It is connect with the cathode of dc-link capacitance, constitutes H bridge converter module.
Further, then by H bridge converter module it by connecting, constitutes middle pressure comprehensive power quality shown in Fig. 3 and controls
Manage device.
Although the illustrative specific embodiment of the present invention is described above, in order to the technology of the art
Personnel understand the present invention, it should be apparent that the present invention is not limited to the range of specific embodiment, to the common skill of the art
For art personnel, if various change the attached claims limit and determine the spirit and scope of the present invention in, these
Variation is it will be apparent that all utilize the innovation and creation of present inventive concept in the column of protection.
Claims (2)
1. a kind of device for controlling the charge and discharge of novel energy storage cell group characterized by comprising energy-storage battery group, the first direct current
Fuse, the second DC fuse, main contactor, absorption resistance, the first auxiliary contactor, charging resistor, capacitance-resistance resistor, power two
Pole pipe, the second auxiliary contactor, the first IGBT1, filter inductance, thin-film capacitor, the 2nd IGBT, Absorption Capacitance and controller unit；
The one end of the high-pressure side DCDC anode respectively with the cathode terminal of power diode and the second auxiliary contactor is attached,
DCDC cathode respectively with one end of the second DC fuse, one end of capacitance-resistance resistor, one end of thin-film capacitor, the 2nd IGBT one
End and the connection of one end of Absorption Capacitance；
The anode tap of the power diode respectively with one end of main contactor, one end of absorption resistance, first auxiliary contactor
One end and one end of charging resistor are attached；
The other end of the other end of the main contactor respectively with one end of the first DC fuse and absorption resistance is attached；
The other end of first DC fuse and one end of energy-storage battery group are attached, and the other end of energy-storage battery group
It is attached with the other end of the second DC fuse；
The other end of first auxiliary contactor respectively with the other end of charging resistor, the other end of capacitance-resistance resistor, thin-film capacitor
The other end and one end of filter inductance be attached；
The other end of the other end of the filter inductance respectively with one end of the first IGBT and the 2nd IGBT is attached；
The other end of the other end of second auxiliary contactor respectively with the other end of the first IGBT and Absorption Capacitance is attached；
The controller unit control terminal with the control terminal of the first IGBT and the 2nd IGBT and each main and auxiliary contactor respectively
Connection；
Control the process of novel energy storage cell group charge and discharge are as follows:
Firstly, device initialization powers on: the killer switch inside manual closing energy-storage battery group, controller unit control master connect
Tentaculum closure, at this time energy-storage battery group, the first DC fuse, main contactor, charging resistor, capacitance-resistance resistor, thin-film capacitor and
The conducting circuit that second DC fuse is constituted, charges to thin-film capacitor；After thin-film capacitor charging complete, controller list
Member control the first auxiliary contactor closure, at this time energy-storage battery group, the first DC fuse, main contactor, the first auxiliary contactor, resistance
Hold the conducting circuit that resistor, thin-film capacitor and the second DC fuse are constituted, the initialized power up process of finishing device；
Secondly, unit state acquires: after the completion of device initialization powers on, voltage sensor obtains the high-pressure side DCDC anode and DCDC
The voltage of cathode, is denoted as: Udc；The voltage and appearance of energy-storage battery group are obtained by the battery management system that energy-storage battery group carries
Amount, is denoted as: U respectivelybessAnd SOC；
Finally, device controls the charge and discharge of energy-storage battery group:
Work as UdcLess than UbessWhen, power diode is connected at this time, energy-storage battery group, the first DC fuse, main contactor, power
The conducting circuit that diode, the high-pressure side DCDC anode, DCDC cathode and the second DC fuse are constituted, energy-storage battery group start by
Dynamic electric discharge；
Work as UdcMore than or equal to Ubess, and SOC be less than energy-storage battery pool-size 50% when, controller unit control the first IGBT work
Make, is charged by the high-pressure side DCDC anode and cathode to energy-storage battery group, there are two circuit alternate conductions at this time: circuit 1: energy storage
Battery pack, the first DC fuse, main contactor, the first auxiliary contactor, filter inductance, the first IGBT, the second auxiliary contactor,
The conducting circuit that the high-pressure side DCDC anode, DCDC cathode and the second DC fuse are constituted, charges for energy-storage battery group；Circuit 2:
Energy-storage battery group, the first DC fuse, main contactor, the first auxiliary contactor, filter inductance, the diode in I GBT and straight
The conducting circuit that flow fuse is constituted is charged for energy-storage battery group；The turn-on time in two circuits according to actual circuit operating condition,
It is arranged automatically by controller unit；When SOC is more than or equal to the 90% of energy-storage battery pool-size, controller unit control first
IGBT stops working, to terminate the charging process of energy-storage battery group；
Work as UdcMore than or equal to Ubess, and SOC be greater than energy-storage battery pool-size 90% when, controller unit itself starts timing,
Time is denoted as T, if T is more than or equal to threshold value N, N is integer, and controller unit controls the 2nd IGBT work, gives energy-storage battery
Group electric discharge, also there are two circuit alternate conductions at this time: circuit 1: energy-storage battery group, the first DC fuse, main contactor, first
The conducting circuit that auxiliary contactor, filter inductance, the 2nd IGBT and the second DC fuse are constituted is discharged for energy-storage battery group；It returns
Road 2: energy-storage battery group, the first DC fuse, main contactor, the first auxiliary contactor, filter inductance, two poles in the first IGBT
The conducting circuit that pipe, the high-pressure side DCDC anode, DCDC cathode and the second DC fuse are constituted, discharges for energy-storage battery group；Two
The turn-on time in circuit is arranged automatically according to actual circuit operating condition situation, by controller unit；When SOC is less than energy-storage battery
Pool-size 50% when, controller unit control the 2nd IGBT stop working, to terminate the discharge process of energy-storage battery group.
2. a kind of device for controlling the charge and discharge of novel energy storage cell group according to claim 1, which is characterized in that described
When capacitance-resistance resistor is grounded GND, directly it is connect with the casing of whole device.
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