CN209016722U - A kind of power cell and power cell control system - Google Patents
A kind of power cell and power cell control system Download PDFInfo
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- CN209016722U CN209016722U CN201822038688.9U CN201822038688U CN209016722U CN 209016722 U CN209016722 U CN 209016722U CN 201822038688 U CN201822038688 U CN 201822038688U CN 209016722 U CN209016722 U CN 209016722U
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Abstract
The utility model provides a kind of power cell and power cell control system, power cell includes 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 and power cell controller, power cell controller controls power cell, the utility model may make up the Power Quality Comprehensive Treatment Device of different voltages grade by plural serial stage, there is temporarily drop in network voltage, when the abnormalities such as short interruptions, the uninterrupted power supply to load may be implemented；Network voltage under normal circumstances, it can be achieved that load high quality reliable power supply, while can to the energy-storage battery group in power cell carry out active management of charging and discharging, and then extend energy-storage battery group service life.
Description
Technical field
The utility model relates to the control technology field of power electronic equipment, in particular to a kind of power cell and power list
First control system.
Background technique
In recent years, the diversified trend of power distribution network source net lotus makes power quality problem from the comprehensive event hair of single mark sense
Exhibition, all kinds of power quality problems become increasingly conspicuous to economic loss caused by enterprise, society and adverse effect, and user is to realization multiclass
The demand of type power quality harnessed synthetically is increasingly strong.There are abatement equipment investments for the distributing improvement of multiclass power quality problem
Huge, O&M somewhat expensive, multiple target distributing administers the problems such as being difficult to realize optimal coordinated control.
Current this field about the power cell topological structure and control method in tandem type power quality controlling device,
When there is temporarily drop in network voltage, it is difficult to realize the uninterrupted power supply to load；When network voltage is normal, due to lacking to energy storage
The active management of charging and discharging of battery pack cannot effectively extend the service life of energy-storage battery group.
Utility model content
In order to solve the above technical problems, the utility model provides a kind of power cell and power cell control system.
A kind of power cell provided by the utility model and power cell control system, may make up difference by plural serial stage
The Power Quality Comprehensive Treatment Device of voltage class, when there are the temporarily abnormalities such as drop, short interruptions in network voltage, Ke Yishi
Now to the uninterrupted power supply of load；In network voltage under normal circumstances, it can be achieved that the high quality reliable power supply of load, while can be right
Energy-storage battery group in power cell carries out active management of charging and discharging, and then extends energy-storage battery group service life.
The technical solution of the utility model includes:
A kind of power cell, including three-phase uncontrollable rectifier bridge, H bridge inverter unit, two-way DC/DC converter and energy storage electricity
Pond group,
The vice-side winding of the input terminal connection phase-shifting transformer of the three-phase uncontrollable rectifier bridge, to defeated to phase-shifting transformer
Enter electric current to be rectified；
The input terminal of the output end connection H bridge inverter unit of the three-phase uncontrollable rectifier bridge, H bridge inverter unit is to will be through
Electric current after crossing the rectification of three-phase uncontrollable rectifier bridge carries out inversion processing；
The output end of the H bridge inverter unit is connected with load, and will pass through H bridge inverter unit inversion, treated
Electric current is exported to load；
The input terminal of the two-way DC/DC converter is connect with the output end of three-phase uncontrollable rectifier bridge, two-way DC/DC transformation
The output end of device connects energy-storage battery group, to control the charging and discharging of energy-storage battery group to extend the energy-storage battery group longevity
Life.
It is also connected between the input terminal of the three-phase uncontrollable rectifier bridge and the vice-side winding of phase-shifting transformer to function
The exchange that rate unit carries out overcurrent protection inputs fuse.
By-pass switch is also connected between the output end and load of the H bridge inverter unit to control to load supplying
System.
Dc-link capacitance, DC bus are also connected in parallel between the three-phase uncontrollable rectifier bridge and H bridge inverter unit
Discharge resistance is connected in parallel on capacitor, dc-link capacitance and discharge resistance cooperation are whole by three-phase uncontrollable rectifier bridge to filter out
The ripple on DC bus-bar voltage after stream.
The output end of the two-way DC/DC converter is also connected with power diode, and the power diode is connected in series straight
Three-phase uncontrollable rectifier bridge output head anode is linked into after stream contactor and DC fuse.
The anode of the low-pressure side anode connection power diode of the two-way DC/DC converter, two-way DC/DC converter
High-pressure side anode connects the cathode of power diode, and the cathode of two-way DC/DC converter is linked into the output of three-phase uncontrollable rectifier bridge
Hold cathode.
A kind of power cell control system, including power cell as described above, the power cell and power cell control
Device processed is connected, and the power cell controller carries out control to power cell to form power cell control system.
Compared with prior art, the utility model has the beneficial effects that
1) when voltage dip occurs in network voltage, it will lead to power cell DC bus-bar voltage and be greatly lowered, when straight
It flows busbar voltage and is lower than energy-storage battery group voltage, power diode conducting, D.C. contactor closure, energy-storage battery group is to direct current mother
Line voltage carries out zero propagation electric discharge, so that DC bus-bar voltage is improved, normal power supply of the holding meanss to load；
2) when network voltage is normal, if voltage dip does not occur for a long time in network voltage, power cell passes through double
Realize active management of charging and discharging to extend the energy-storage battery group service life energy-storage battery group to dcdc converter；Pass through power cell
The setting of controller and power diode, the very little that the charging and discharging currents of energy-storage battery group are controlled, therefore it is two-way
The power of DC/DC converter can choose very little, and then save power cell overall cost, and reduce power cell volume.
Detailed description of the invention
Fig. 1 is a kind of power cell topology diagram.
Fig. 2 is a kind of power cell control method flow chart.
Fig. 3 is a kind of power quality controlling device major loop figure that cascade of power units is constituted.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Referring to Fig. 1, the utility model provides a kind of technical solution:
A kind of power cell control system, including exchange input fuse 1, three-phase uncontrollable rectifier bridge 2, dc-link capacitance
3, discharge resistance 4, H bridge inverter unit 5, by-pass switch 6, two-way DC/DC converter 7, power diode 8, D.C. contactor 9,
DC fuse 10, energy-storage battery group 11 and power cell controller 12, exchange input fuse 1 respectively with input side
Phase-shifting transformer, three-phase uncontrollable rectifier bridge 2 connect；The three-phase uncontrollable rectifier bridge 2 connect 3 with dc-link capacitance；It is described straight
Stream bus capacitor 3 is connect with discharge resistance 4, H bridge inverter unit 5, DC fuse 10 respectively；The H bridge inverter unit 5 and side
Way switch 6 connects；The DC fuse 10 is connect with D.C. contactor 9；The D.C. contactor 9 connects with power diode 8
It connects；The power diode 8 is connect with energy-storage battery group 11, two-way DC/DC converter 7 respectively；The energy-storage battery group 11 with
Dc-link capacitance 3 connects；The two-way DC/DC converter 7 is connect with dc-link capacitance 3；The power cell controller
12 pairs of power cells control.
As shown in Fig. 2, the utility model provides a kind of power cell control method, DC bus-bar voltage rated value Ur
=930V, battery pack end voltage Ub=700V, time constant A=72h, power diode discharge current maximum value Imax=74A,
Power cell DC bus-bar voltage minimum value Udcmin=650V, energy-storage battery group end voltage minimum Ubmin=670V, energy storage electricity
Chi Zuduan voltage rating Ubr=700V, the control method the following steps are included:
1) power cell controller starts, timer t1Start timing, enables bit variable flag1=0, flag2=0；
2) by voltage sensor, sampling obtains power cell DC bus-bar voltage udcWith energy-storage battery group end voltage ub,
Using Filtering Formula, the ripple of 2 ω in DC voltage is filtered out, obtains filtering out the later DC bus-bar voltage of ripple being Udc, energy storage
Battery pack end voltage is Ub；By current sensor, sampling obtains power diode discharge current ig, calculated using virtual value public
Formula, obtaining power diode discharge current virtual value is Ig；
If 3) Udc< Ub, energy-storage battery group discharged by power diode, timer t at this time2Start timing；If function
Rate diode discharge current effective value Ig≥ImaxOr DC bus-bar voltage Udc≤UdcminOr timer t2>=60s, control
Device controls power cell IGBT and seals wave, this seasonal timer t2=0, bit variable flag1=1；If power diode electric discharge electricity
Flow virtual value Ig=0, this seasonal timer t2=0, bit variable flag1=1；
If 4) Umin≤Udc≤Umax, wherein Umin=0.9Ur,Umax=1.1Ur, and timer t1≥A；Controller at this time
It controls two-way DC/DC converter and active discharge is carried out to energy-storage battery group；If DC bus-bar voltage Udc< Umin, controller control
Two-way DC/DC converter IGBT envelope wave is made, the active discharge of energy-storage battery group is stopped；If energy-storage battery group voltage Ub≤Ubmin,
Controller controls two-way DC/DC converter IGBT and seals wave, stops the active discharge of energy-storage battery group, with season bit variable flag2
=1, timer t1=0；
If 5) Umin≤Udc≤Umax, and bit variable flag1=1 or flag2=1, controller controls two-way DC/DC at this time
Converter is to energy-storage battery group with electric current IcIt charges, IcFor the optimal charging instruction value of energy-storage battery group；If DC bus
Voltage Udc< Umin, the two-way DC/DC converter IGBT envelope wave of controller control, the active charge of stopping energy-storage battery group；If storage
It can battery voltage Ub≥Ubr, controller controls two-way DC/DC converter IGBT and seals wave, and the active for stopping energy-storage battery group is filled
Electricity, with season bit variable flag1=0, flag2=0, timer t1Start reclocking；
If 6) Ub≤Udc< UminOr Udc> Umax, simultaneously bi-directionally DC/DC converter is in running order, controller control
Two-way DC/DC converter IGBT envelope wave is made, its work is stopped.
As shown in figure 3, the utility model provides a kind of power quality controlling device that cascade of power units is constituted, by mistake
Voltage protection, input switch cabinet, 10kV/380V step-down transformer, soft charge device, phase-shifting transformer, power cell mould
Block, ground resistance, bypass cock cabinet, output switch cabinet composition.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.
Claims (7)
1. a kind of power cell, it is characterised in that: including three-phase uncontrollable rectifier bridge, H bridge inverter unit, two-way DC/DC converter
And energy-storage battery group,
The vice-side winding of the input terminal connection phase-shifting transformer of the three-phase uncontrollable rectifier bridge, to input electricity to phase-shifting transformer
Stream is rectified；
The input terminal of the output end connection H bridge inverter unit of the three-phase uncontrollable rectifier bridge, H bridge inverter unit will be will pass through three
Electric current after the rectification of phase uncontrollable rectifier bridge carries out inversion processing；
The output end of the H bridge inverter unit is connected with load, treated will pass through H bridge inverter unit inversion electric current
It exports to load；
The input terminal of the two-way DC/DC converter is connect with the output end of three-phase uncontrollable rectifier bridge, two-way DC/DC converter
Output end connects energy-storage battery group, to control the charging and discharging of energy-storage battery group to extend the energy-storage battery group service life.
2. a kind of power cell according to claim 1, it is characterised in that: the input terminal of the three-phase uncontrollable rectifier bridge with
It is also connected with the exchange to carry out overcurrent protection to power cell between the vice-side winding of phase-shifting transformer and inputs fuse.
3. a kind of power cell according to claim 1, it is characterised in that: the output end of the H bridge inverter unit and negative
By-pass switch is also connected between load to control load supplying.
4. a kind of power cell according to claim 1, it is characterised in that: the three-phase uncontrollable rectifier bridge and the inversion of H bridge
It is also connected in parallel to dc-link capacitance between unit, discharge resistance, dc-link capacitance are connected in parallel on dc-link capacitance
With discharge resistance cooperation to filter out the ripple on the DC bus-bar voltage after the rectification of three-phase uncontrollable rectifier bridge.
5. a kind of power cell according to claim 1, it is characterised in that: the output end of the two-way DC/DC converter
It is also connected with power diode, three-phase is linked into after the power diode series connection D.C. contactor and DC fuse and does not control
Rectification bridge output end anode.
6. a kind of power cell according to claim 5, it is characterised in that: the low-pressure side of the two-way DC/DC converter
The anode of anode connection power diode, the cathode of the high-pressure side anode connection power diode of two-way DC/DC converter are two-way
The cathode of DC/DC converter is linked into three-phase uncontrollable rectifier bridge negative pole of output end.
7. a kind of power cell control system, it is characterised in that: including power cell controller and as claim 1-6 is any
Power cell described in, the power cell are connected with power cell controller, and the power cell controller is for adopting
Collect power cell DC bus-bar voltage, energy-storage battery group end voltage and power diode discharge current, according to the direct current of acquisition
Busbar voltage, energy-storage battery group end voltage and power diode discharge current are calculated and compared, and by controlling two-way DC/
DC converter carries out charge and discharge control to energy-storage battery group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822038688.9U CN209016722U (en) | 2018-12-04 | 2018-12-04 | A kind of power cell and power cell control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822038688.9U CN209016722U (en) | 2018-12-04 | 2018-12-04 | A kind of power cell and power cell control system |
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| Publication Number | Publication Date |
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| CN209016722U true CN209016722U (en) | 2019-06-21 |
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ID=66843604
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| CN201822038688.9U Active CN209016722U (en) | 2018-12-04 | 2018-12-04 | A kind of power cell and power cell control system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112615551A (en) * | 2020-12-09 | 2021-04-06 | 国网湖北省电力有限公司电力科学研究院 | MMC type medium voltage power supply quality comprehensive improving system |
| CN112615388A (en) * | 2020-12-15 | 2021-04-06 | 国网湖北省电力有限公司电力科学研究院 | Medium-high voltage power supply quality unified regulator containing distributed energy storage units |
| CN113364063A (en) * | 2021-08-10 | 2021-09-07 | 湖北东湖实验室 | Radial power grid structure of comprehensive electric power system of pure battery power ship and control method |
| CN113927282A (en) * | 2021-10-19 | 2022-01-14 | 广西电网有限责任公司河池供电局 | Uninterrupted power supply's high-frequency heating dismantles screw device |
-
2018
- 2018-12-04 CN CN201822038688.9U patent/CN209016722U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112615551A (en) * | 2020-12-09 | 2021-04-06 | 国网湖北省电力有限公司电力科学研究院 | MMC type medium voltage power supply quality comprehensive improving system |
| CN112615388A (en) * | 2020-12-15 | 2021-04-06 | 国网湖北省电力有限公司电力科学研究院 | Medium-high voltage power supply quality unified regulator containing distributed energy storage units |
| CN113364063A (en) * | 2021-08-10 | 2021-09-07 | 湖北东湖实验室 | Radial power grid structure of comprehensive electric power system of pure battery power ship and control method |
| CN113927282A (en) * | 2021-10-19 | 2022-01-14 | 广西电网有限责任公司河池供电局 | Uninterrupted power supply's high-frequency heating dismantles screw device |
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