CN209016720U - A kind of novel power cell - Google Patents
A kind of novel power cell Download PDFInfo
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- CN209016720U CN209016720U CN201821544888.5U CN201821544888U CN209016720U CN 209016720 U CN209016720 U CN 209016720U CN 201821544888 U CN201821544888 U CN 201821544888U CN 209016720 U CN209016720 U CN 209016720U
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Abstract
The utility model proposes a kind of novel power cell, which is made of exchange input fuse, three-phase uncontrollable rectifier bridge, dc-link capacitance, discharge resistance, H bridge inverter unit, by-pass switch, two-way DC/DC converter, power diode, D.C. contactor, DC fuse, energy-storage battery group.The power quality controlling device that the novel power unit is constituted can realize that load normal power supply, the active management of charging and discharging control of energy-storage battery group may be implemented when network voltage is normal in the novel power unit when network voltage temporarily drops.When irreversible failure occurs in the novel power unit, power cell can realize that by-pass operation power quality controlling device is not shut down by closure by-pass switch.
Description
Technical field
The utility model belongs to the control technology field of multifunctional electric power device, in particular to a kind of novel power
Unit.
Background technique
Power quality is to examine the important evidence of electric service level closely, the world Yi Shi is logical to judge criterion with user experience
With the evaluation criterion of high-quality electric energy.Current all kinds of power quality problems are to economic loss and adverse effect caused by enterprise, society
It becomes increasingly conspicuous, demand of the user to polymorphic type power quality harnessed synthetically is realized is increasingly strong, while installing power quality controlling
Device is also 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, topology are generally female by three-phase uncontrollable rectifier bridge, direct current
Line capacitance, H bridge inverter unit composition.This power cell topological structure cannot achieve power grid because not having energy storage component
Temporarily dropping and load supplying problem when voltage interruption occurs in voltage；Secondly, because not having hardware bypass circulation, when power cell mould
When irreversible failure occurs for block, it cannot achieve the by-pass operation of fault power unit, lead to power quality controlling device reliability
It reduces.
Summary of the invention
In view of this, the power cell can be in network voltage the utility model proposes a kind of novel power cell
It when voltage dip occurs, is discharged by energy-storage battery group and maintains power cell DC bus-bar voltage constant, to eliminate power grid electricity
Pressure temporarily influence of the drop to load；It simultaneously can be when irreversible failure occurs for power cell, by closure by-pass switch to power
Unit carries out Fault Isolation, to guarantee the reliable and stable operation of power quality controlling device.
The utility model proposes the novel power cell of one kind, the technical solution adopted is as follows:
The utility model proposes each component of power cell include: exchange input fuse, three-phase uncontrollable rectifier bridge, direct current
Bus capacitor, discharge resistance, H bridge inverter unit, by-pass switch, two-way DC/DC converter, power diode, D.C. contactor,
DC fuse, energy-storage battery group.
Further, described exchange input fuse one end and phase-shifting transformer vice-side winding in power quality controlling device
Connection.
Further, the exchange input fuse other end is connect with three-phase uncontrollable rectifier bridge ac input end.
Further, the direct current output anode of the three-phase uncontrollable rectifier bridge is connect with dc-link capacitance anode, three-phase
The direct current output cathode of uncontrollable rectifier bridge is connect with dc-link capacitance cathode.
Further, the dc-link capacitance anode is connect with discharge resistance one end, the dc-link capacitance cathode
It is connect with the discharge resistance other end.
Further, the dc-link capacitance anode inputs one end with H bridge inverter unit direct current and connect, and the direct current is female
Line capacitance cathode is connect with the H bridge inverter unit direct current input other end.
Further, H bridge inverter unit outlet side both ends and the both ends of by-pass switch connect.
Further, the anode of the dc-link capacitance is connect with one end of DC fuse.
Further, one end of the other end of the DC fuse and D.C. contactor connects.
Further, the cathode of the other end of the D.C. contactor and power diode connects.
Further, the anode of the power diode is connect with the anode of energy-storage battery group.
Further, the cathode connection of the cathode and dc-link capacitance of the energy-storage battery group.
Further, the power diode cathode is connect with the high-pressure side anode of two-way DC/DC converter.
Further, the power diode anode is connect with the low-pressure side anode of two-way DC/DC converter.
Further, the cathode of the cathode of the two-way DC/DC converter and dc-link capacitance connects.
The utility model proposes a kind of novel power unit led the advantage is that: there is voltage dip in network voltage
When power cell DC bus-bar voltage being caused to be greatly lowered, energy-storage battery group may be implemented to DC bus by power diode
The zero propagation of voltage discharges, while maintaining DC voltage constant, normal power supply of the holding meanss to load.
When network voltage is normal, if there is not voltage dip for a long time in network voltage, in order to extend the battery pack longevity
Life, device need to realize energy-storage battery group the control of active management of charging and discharging.Therefore, which configures bidirectional DC/DC
Converter realizes the control of active management of charging and discharging to energy-storage battery group, since the charging and discharging currents of battery pack can be controlled very
It is small, therefore the power of bidirectional DC/DC converter can choose very little, so as to save power cell overall cost, and reduce function
Rate unit volume.
The power unit module high reliablity can pass through closure when irreversible failure occurs in power unit module
By-pass switch realizes unit by-pass operation and device is not shut down.
Detailed description of the invention
Fig. 1 is a kind of novel power unit structural block diagram.
Specific embodiment
Below in conjunction with attached drawing to the utility model proposes the novel power cell of one kind be further described.
As shown in Figure 1, a kind of novel power cell structure block diagram mainly inputs fuse, three-phase uncontrollable rectifier by exchange
Bridge, dc-link capacitance, discharge resistance, H bridge inverter unit, by-pass switch, two-way DC/DC converter, power diode, direct current
Contactor, DC fuse, energy-storage battery group are constituted.Each achievable major function of module is as follows:
Exchange input fuse: the effect of exchange input fuse is when DC bus-bar voltage occurs in power unit module
When short trouble, the protection to phase-shifting transformer in complete machine device is may be implemented in quick fuse.
Three-phase uncontrollable rectifier bridge: direct current is converted to for realizing by three-phase alternating current.
Dc-link capacitance: be used to support DC bus-bar voltage, filter out ripple, provide device Converting Unit needed for ripple and
Harmonic current.
Discharge resistance: being convenient for dc-link capacitance repid discharge when shutting down for device, is convenient for turnaround of unit and maintenance.
H bridge inverter unit: for being alternating current by DC power conversion, shape is superimposed by the phase shift of unit module output level
At 10kV output voltage powering load.
By-pass switch: for that can be allowed by being closed by-pass switch when irreversible heavy failure occurs in power unit module
Device realizes by-pass operation, guarantees that device works reliably and with long-term.
Two-way DC/DC converter: for network voltage under normal circumstances, realize it is automatically controlled to the charge and discharge of energy-storage battery group
System.
Power diode: for when temporarily drop occurs in network voltage, power unit module DC bus-bar voltage to be lower than energy storage
In the case where battery voltage, zero propagation electric discharge can be realized to energy-storage battery group, maintains DC bus-bar voltage constant.
D.C. contactor: for when power unit module or energy-storage battery group break down, realize energy-storage battery group with
The electrical disjunction of dc-link capacitance.
DC fuse: for protecting energy-storage battery group when short trouble occurs in power unit module DC bus
Safety.
Energy-storage battery group: for being discharged by energy-storage battery group and maintaining direct current female when voltage dip occurs in network voltage
Line voltage is constant, to guarantee the normal power supply to load.
Exchange input fuse one end is connect with phase-shifting transformer vice-side winding in power quality controlling device；It is described
The exchange input fuse other end is connect with three-phase uncontrollable rectifier bridge ac input end；The direct current of the three-phase uncontrollable rectifier bridge is defeated
Anode is connect with dc-link capacitance anode out, and the direct current output cathode and dc-link capacitance cathode of three-phase uncontrollable rectifier bridge connect
It connects；The dc-link capacitance anode is connect with discharge resistance one end, and the dc-link capacitance cathode and discharge resistance are another
End connection；The dc-link capacitance anode inputs one end with H bridge inverter unit direct current and connect, the dc-link capacitance cathode
It is connect with the H bridge inverter unit direct current input other end；H bridge inverter unit outlet side both ends and the both ends of by-pass switch connect
It connects.
Above-mentioned steps realize power unit module input three-phase alternating current, are converted into direct current through three-phase uncontrollable rectifier,
Direct current is filtered by dc-link capacitance, by H bridge inverter unit, is converted into single phase ac electricity output, and in power list
When irreversible failure occurs for element module, the by-pass operation of fault power unit module is may be implemented in closure by-pass switch, is not influenced
The normal operation of whole device.
The anode of the DC bus is connect with one end of DC fuse；The other end and direct current of the DC fuse
One end of contactor connects；The other end of the D.C. contactor and the cathode of power diode connect；The power diode
The anode of anode and energy-storage battery group connect；The cathode of the energy-storage battery group and the cathode of dc-link capacitance connect；Institute
Power diode cathode is stated to connect with the high-pressure side anode of two-way DC/DC converter；The power diode anode and two-way DC/
The low-pressure side anode of DC converter connects；The cathode of the two-way DC/DC converter and the cathode of dc-link capacitance connect.
Above-mentioned steps realize network voltage when voltage dip occurs, and dc-link capacitance voltage will be greatly reduced,
Energy-storage battery group can quickly be discharged to power unit module DC bus-bar voltage by power diode at this time, realize electric discharge zero
Delay, and maintain DC bus-bar voltage constant, to guarantee that power cell is realized when network voltage temporarily drops to the normal of load
Power supply.Secondly, when network voltage is normal, if there is not voltage dip for a long time in network voltage, in order to extend battery pack
Service life, device need to realize energy-storage battery group the control of active management of charging and discharging.Therefore, novel power unit configuration is two-way
Dcdc converter realizes the control of active management of charging and discharging to energy-storage battery group.Simultaneously because the charging and discharging currents of battery pack can be by
The very little of control, so the power of bidirectional DC/DC converter can choose very little, so as to save power cell overall cost,
And reduce power cell volume.Again, when short trouble occurs for power unit module DC bus or energy-storage battery group, direct current
Fuse and D.C. contactor can effective disjunction short-circuit loop, prevent failure propagation, guarantee power quality controlling device safety.
Above-described embodiment cannot exhaustive the utility model implementation, for those skilled in the art, according to this reality
With novel description, the protection of the utility model can be come under there are many implementation in conjunction with the ordinary skill in the art
Range.
Claims (3)
1. the utility model proposes the novel power cell of one kind, it is characterised in that: a kind of novel power cell includes: to hand over
It is stream input fuse, three-phase uncontrollable rectifier bridge, dc-link capacitance, discharge resistance, H bridge inverter unit, by-pass switch, two-way
DC/DC converter, power diode, D.C. contactor, DC fuse, energy-storage battery group and for connecting the above circuit elements device
The connection line of part, in which: the output end of exchange input fuse connects three-phase uncontrollable rectifier bridge；Three-phase uncontrollable rectifier bridge it is defeated
Outlet connects dc-link capacitance；Discharge resistance and dc-link capacitance parallel connection access H bridge inverter unit；H bridge inverter unit
Output end connects by-pass switch；The output end of two-way DC/DC converter is separately connected power diode, energy-storage battery group and direct current
The negative terminal of bus capacitor；The output end of power diode connects D.C. contactor；The output end connection direct current of D.C. contactor is molten
Disconnected device；The anode of the output end connection dc-link capacitance of DC fuse.
2. the novel power cell of one kind according to claim 1, it is characterised in that: exchange input fuse one end and electricity
Phase-shifting transformer vice-side winding connection in energy quality controlling device；The exchange input fuse other end and three-phase uncontrollable rectifier
The connection of bridge ac input end；The direct current output anode of the three-phase uncontrollable rectifier bridge is connect with dc-link capacitance anode, three-phase
The direct current output cathode of uncontrollable rectifier bridge is connect with dc-link capacitance cathode；The dc-link capacitance anode and discharge resistance
One end connection, the dc-link capacitance cathode are connect with the discharge resistance other end；The dc-link capacitance anode and H bridge are inverse
Become unit direct current and input one end connection, the dc-link capacitance cathode is connect with the H bridge inverter unit direct current input other end；Institute
The both ends for stating H bridge inverter unit outlet side both ends and by-pass switch connect.
3. the novel power cell of one kind according to claim 1, it is characterised in that: the anode of the DC bus with it is straight
One end of flow fuse connects；The other end of the DC fuse and one end of D.C. contactor connect；The direct current contact
The other end of device and the cathode of power diode connect；The anode of the power diode is connect with the anode of energy-storage battery group；
The cathode of the energy-storage battery group and the cathode of dc-link capacitance connect；The power diode cathode and two-way DC/DC become
The high-pressure side anode of parallel operation connects；The power diode anode is connect with the low-pressure side anode of two-way DC/DC converter；It is described
The cathode of two-way DC/DC converter and the cathode of dc-link capacitance connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821544888.5U CN209016720U (en) | 2018-09-21 | 2018-09-21 | A kind of novel power cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821544888.5U CN209016720U (en) | 2018-09-21 | 2018-09-21 | A kind of novel power cell |
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| Publication Number | Publication Date |
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| CN209016720U true CN209016720U (en) | 2019-06-21 |
Family
ID=66833814
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| CN201821544888.5U Active CN209016720U (en) | 2018-09-21 | 2018-09-21 | A kind of novel power cell |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110518610A (en) * | 2019-08-29 | 2019-11-29 | 电子科技大学 | A kind of device controlling the charge and discharge of novel energy storage cell group |
| CN110943599A (en) * | 2019-12-03 | 2020-03-31 | 西安中车永电电气有限公司 | Multifunctional novel efficient power unit and power circuit thereof |
| CN114243751A (en) * | 2021-11-09 | 2022-03-25 | 长春吉电能源科技有限公司 | Power electronics light storage fusion grid-connected system |
-
2018
- 2018-09-21 CN CN201821544888.5U patent/CN209016720U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110518610A (en) * | 2019-08-29 | 2019-11-29 | 电子科技大学 | A kind of device controlling the charge and discharge of novel energy storage cell group |
| CN110943599A (en) * | 2019-12-03 | 2020-03-31 | 西安中车永电电气有限公司 | Multifunctional novel efficient power unit and power circuit thereof |
| CN114243751A (en) * | 2021-11-09 | 2022-03-25 | 长春吉电能源科技有限公司 | Power electronics light storage fusion grid-connected system |
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