CN108306308A - A kind of stepless adjustable apparatus for adjusting capacity controlled using IGBT - Google Patents
A kind of stepless adjustable apparatus for adjusting capacity controlled using IGBT Download PDFInfo
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- CN108306308A CN108306308A CN201810110760.6A CN201810110760A CN108306308A CN 108306308 A CN108306308 A CN 108306308A CN 201810110760 A CN201810110760 A CN 201810110760A CN 108306308 A CN108306308 A CN 108306308A
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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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1807—Arrangements for adjusting, eliminating or compensating reactive power in networks using series compensators
-
- 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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
- H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
- H02J3/1864—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein the stepless control of reactive power is obtained by at least one reactive element connected in series with a semiconductor switch
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electrical Variables (AREA)
Abstract
The invention discloses a kind of stepless adjustable apparatus for adjusting capacity controlled using IGBT, including filtering input module Ui, filtering input module Ui is connected with filter circuit, filter circuit is connected with S1 IGBT switch modules, the S1 IGBT switch modules are connected with inductance L2, and the inductance L2 connection electric capacitors C2, the electric capacitor C2 are connect with filter circuit, wherein, S2 IGBT afterflow modules are connected in parallel between the S1 IGBT switch modules and electric capacitor C2.Beneficial effects of the present invention：The present invention can according to power factor PID/feedback step-less adjustment reactive power, achieve the purpose that power factor it is constant be 1, ms grades of response speed；The present invention also has the characteristics that control is simple, small, light weight and cost is low and step-less adjustment, while can be suitable for the highly practical reactive power compensator of various different occasions, has the advantages that strong applicability；Reactive power calculating circuit built in the present apparatus, control and display circuit more parallel-operation expansions or can reduce the cost with intelligent capacitor and machine.
Description
Technical field
The present invention relates to stepless adjustable apparatus for adjusting capacity reactive power compensation technology fields, it particularly relates to which a kind of using IGBT
The stepless adjustable apparatus for adjusting capacity of control.
Background technology
Currently, in power domain, it is necessary to configure reactive-load compensation equipment, the common reactive-load compensation equipment in market has multiple at present
Combination switch, synchronous switch switched capacitor scheme, static reactive generator (SVG）Etc. modes, combination switch, synchronous switch switching
Capacitor schemes are simple in structure but response speed is slow（15 seconds or so）, adjusting has grade, power factor that can only control 0.95 or so；
Static reactive generator is complicated, it is of high cost, have serious harmonic wave；All there are certain drawbacks, has been unable to meet the need in market
It asks.
Invention content
For above-mentioned technical problem in the related technology, the present invention proposes a kind of stepless adjustable capacity transfer controlled using IGBT
Device can overcome the above-mentioned deficiency of the prior art.
To realize the above-mentioned technical purpose, the technical proposal of the invention is realized in this way：
A kind of stepless adjustable apparatus for adjusting capacity controlled using IGBT, including filtering input module Ui, the filtering input module Ui
It is connected with filter circuit, the filter circuit is connected with S1-IGBT switch modules, and the S1-IGBT switch modules are connected with electricity
Feel L2, the inductance L2 connection electric capacitors C2, the electric capacitor C2 are connect with filter circuit, wherein the S1-IGBT is opened
It closes and is connected in parallel to S2-IGBT afterflow modules between module and electric capacitor C2.
Further, the filter circuit includes inductance L1, the left end connection filtering input module Ui's of the inductance L1
Upper end, the right end of the inductance L1 are separately connected the left end of the upper end and S1-IGBT switch modules of capacitance C1, the capacitance C1's
The lower end of lower end connection filtering input module Ui.
Further, the S1-IGBT switch modules include transistor IGBT 1, the collector point of the transistor IGBT 1
Not Lian Jie the cathode of diode VD1, capacitance VC1 left end and inductance L1 right end, the emitter difference of the transistor IGBT 1
Connect the right end and capacitance of the emitter of transistor IGBT 2, the anode of diode VD1, the anode of diode VD2, capacitance VC1
The left end of VC2, the collector of the transistor IGBT 2 are separately connected the right end and inductance of the cathode of diode VD2, capacitance VC2
The left end of L2.
Further, the S2-IGBT afterflows module includes transistor IGBT 3, the collector of the transistor IGBT 3
Be separately connected the cathode of diode VD3, the upper end and inductance L2 of capacitance VC3 left end, the emitter of the transistor IGBT 3 point
It Lian Jie not the emitter of transistor IGBT 4, the anode of diode VD3, the anode of diode VD4, the lower end of capacitance VC3 and capacitance
The collector of the upper end of VC4, the transistor IGBT 4 is separately connected the cathode of diode VD4, the lower end of capacitance VC4 and electric power
The lower end of capacitance C2.
Further, the upper end of the right end connection electric capacitor C2 of the inductance L2, the lower end of the electric capacitor C2 connects
Connect the lower end of capacitance C1.
Beneficial effects of the present invention：The present invention can reach power according to power factor PID/feedback step-less adjustment reactive power
The constant purpose for being 1 of factor, ms grades of response speed；The present invention also have control simple, small, light weight and cost it is low and
The characteristics of step-less adjustment, while the highly practical reactive power compensator of various different occasions can be suitable for, there is applicability
Strong advantage；Reactive power calculating circuit built in the present apparatus, control and display circuit, can more parallel-operation expansions or and intelligent capacitor
And machine reduces the cost.
Description of the drawings
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the present invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is that a kind of work of the stepless adjustable apparatus for adjusting capacity controlled using IGBT described according to embodiments of the present invention is former
Reason figure；
Fig. 2 is a kind of logical pulse of the stepless adjustable apparatus for adjusting capacity controlled using IGBT described according to embodiments of the present invention
Figure；
Fig. 3 is a kind of control sequential of the stepless adjustable apparatus for adjusting capacity controlled using IGBT described according to embodiments of the present invention
Figure；
Fig. 4 is under a kind of three-phase system of the stepless adjustable apparatus for adjusting capacity controlled using IGBT described according to embodiments of the present invention
Schematic diagram；
Fig. 5 is a kind of three-phase and four-line system of the stepless adjustable apparatus for adjusting capacity controlled using IGBT described according to embodiments of the present invention
Schematic diagram under system；
Fig. 6 is that a kind of embodiment of the stepless adjustable apparatus for adjusting capacity controlled using IGBT described according to embodiments of the present invention is former
Reason figure.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, every other embodiment that those of ordinary skill in the art are obtained (including substituted with field-effect tube
IGBT), shall fall within the protection scope of the present invention.
As shown in Figure 1, a kind of stepless adjustable apparatus for adjusting capacity controlled using IGBT described according to embodiments of the present invention, packet
It includes filtering input module Ui, the filtering input module Ui and is connected with filter circuit, the filter circuit is connected with S1-IGBT and opens
Module is closed, the S1-IGBT switch modules are connected with inductance L2, the inductance L2 connection electric capacitors C2, the electric capacitor
C2 is connect with filter circuit, wherein it is continuous that S2-IGBT is connected in parallel between the S1-IGBT switch modules and electric capacitor C2
Flow module.
In one embodiment, the filter circuit includes inductance L1, the left end connection filtering input of the inductance L1
The upper end of module Ui, the right end of the inductance L1 is separately connected the left end of the upper end and S1-IGBT switch modules of capacitance C1, described
The lower end of the lower end connection filtering input module Ui of capacitance C1.
In one embodiment, the S1-IGBT switch modules include transistor IGBT 1, the transistor IGBT 1
Collector is separately connected the right end of the cathode of diode VD1, the left end of capacitance VC1 and inductance L1, the hair of the transistor IGBT 1
Emitter-base bandgap grading is separately connected the right end of the emitter of transistor IGBT 2, the anode of diode VD1, the anode of diode VD2, capacitance VC1
With the left end of capacitance VC2, the collector of the transistor IGBT 2 is separately connected the right end of the cathode of diode VD2, capacitance VC2
With the left end of inductance L2.
In one embodiment, the S2-IGBT afterflows module includes transistor IGBT 3, the transistor IGBT 3
Collector be separately connected the cathode of diode VD3, the upper end of capacitance VC3 and inductance L2 left end, the transistor IGBT 3
Emitter is separately connected under the emitter of transistor IGBT 4, the anode of diode VD3, the anode of diode VD4, capacitance VC3
The upper end at end and capacitance VC4, the collector of the transistor IGBT 4 are separately connected under the cathode of diode VD4, capacitance VC4
The lower end at end and electric capacitor C2.
In one embodiment, the upper end of the right end connection electric capacitor C2 of the inductance L2, the electric capacitor C2
Lower end connection capacitance C1 lower end.
In order to facilitate understand the present invention above-mentioned technical proposal, below by way of in specifically used mode to the present invention it is above-mentioned
Technical solution is described in detail.
When specifically used, the present invention includes：" L1, C1- input LC filtering " " S1-IGBT switch modules ", " S2-
IGBT afterflows module ", " L2-output filtering ", " C2- electric capacitors "；" L1, C1- input LC filtering ", inductance L1
It can inhibit immediate current, the input current of the device is played and inhibits protective effect well, while also playing power grid
The filter action of harmonic wave, cooperation capacitance C1 constitute LC filter circuits, are filtered to end of incoming cables；
The S1-IGBT switch modules and S2-IGBT afterflow modules, S1 of the present invention is main switch, and S2 is continued flow switch；S1 connects
In circuit, play the role of the switch on and off of main circuit；S2 is connected in parallel in main circuit, and when S1 is turned off, S2, which is opened, plays afterflow work
With by AC chopping control principle, the voltage or electric current being added on capacitance C2 are released in change, to change the capacity of capacitance.
" L2-output filtering " of the present invention is connected between S1 and C2, which can filter out very well on switch fundamental wave
Harmonic wave, it is pure sine wave to make the voltage being finally loaded on capacitance C2 or electric current；" C2- electric power electricity of the present invention
Hold ", which is attempted by output circuit, with the change of control voltage or electric current, to change capacitor own reactive
The number of power.
The principle of stepless adjustable capacitor：Pass through the control IGBT of high frequency fast periodic（Insulated gate bipolar transistor）
It turns on and off, continuous sinusoidal input power " cutting " at being loaded on capacitance after discrete segment and filtering.It is single-phase stepless
The control circuit of adjustable capacity transfer is as shown in Figure 1：S1 is main circuit chopping switch, and S2 is continued flow switch, and the control signal of S1, S2 exist
Dead zone is mutually added on switching sequence, incomplementarity is used in control mode, and output is adjusted by changing the duty ratio of IGBT conductings
Voltage or electric current, to change the capacitance of electric capacitor C2.
Alternating-current chopper circuit is controlled by microcontroller, according to the frequency of PWM and duty ratio come to input voltage copped wave；Exchange
Copped wave capacity transfer mode is that incomplementarity continuously adjusts mode, and input current, the influence of harmonic wave of output voltage and its power grid is than phased
Small more of mode；When switching frequency is sufficiently high, as long as the rational input of selection, output filter, so that it may with by input voltage, defeated
The harmonic wave gone out in electric current almost filters out.
Principle：The operation principle of single phase ac copped wave capacity transfer technology is connected using 4 full-controlled device IGBT with electric capacitor,
By controlling on off state, keep output voltage directly proportional to duty ratio, change duty ratio can reduce or boosted output voltages
Amplitude, to achieve the purpose that a liter appearance drop is held.
Control operation principle：As shown in Fig. 1 schematic diagrams, S1, S2 complementation in one cycle is connected, and logical pulse figure is such as
Shown in Fig. 2, in positive half period, when switch S1 is closed, VD2 commutation synchronizations are connected in IGBT1；When S1 disconnects S2 connections, IGBT4
VD3 commutation synchronizations are connected in afterflow；In negative half-cycle, principle is similarly.
In the present invention, timing control figure is as shown in figure 3, in the Ith section, Ui>0,Io>0, instantaneous power is more than zero
Po=Ui*Io>0, power supply needs to store quadergy to electric capacitor C2, IGBT1, IGBT3 copped wave state, IGBT1,
At the time of IGBT3 is turned off, the afterflow of inductance L2 and the flat wave effect of capacitor C2 so that diode VD3 and IGBT4 are because bearing just
It is in the conduction state to voltage.During working herein, IGBT4, IGBT2 are constantly in conducting state, are provided for entire circuit
Good afterflow, and IGBT1 and IGBT4 is while the change of current works, and is not at the time of simultaneously turning on or simultaneously turn off.
In section II, voltage Ui at this time>0, electric current Io<0, instantaneous power Po=Ui*Io<0, capacitance needs to feed back to power supply idle
Energy, IGBT1 and IGBT3 alternate conductions, IGBT2 has always the drive signal of high level in this section, is turned off in IGBT4
When, IGBT2 due to being connected naturally by forward voltage, and IGBT1 is in cut-off state by backward voltage, and electric current is through IGBT2 and two poles
Pipe VD2 stores quadergy to electric capacitor C2.When IGBT3 has positive pulse signal, IGBT3 is connected naturally by forward voltage,
IGBT4 is in cut-off state by backward voltage, and electric current is idle to electric capacitor C2 storages by IGBT3 and diode VD3 afterflows
Energy.In entire operating mode, IGBT2 has always high level drive signal, so IGBT2 and diode in this area
Disconnection state is not present in the change of current of VD2.In III, the IV section, working method is similar to the I, the II section, no longer illustrates here.
Power switch gate-drive state is as shown in table 1.
In table, " 1 " indicates drive signal；" 0 " indicates gate signal block；Ug, Us indicate chopping switch and continue respectively
Flow the drive signal of switch.
It is as shown in Figure 4 that phase three-wire three mends stepless adjustable power capacitor apparatus main circuit diagram altogether：4 are only used in circuit
IGBT module and 6 diodes are few using power electronic devices.The trigger signal and IGBT4 of IGBT1, IGBT2, IGBT3 are mutual
It mends, and is equipped with dead time；When IGBT1~IGBT3 is connected, A phases, B phases forward voltage access electric power by IGBT1, IGBT2
Capacitance C is connected to C phases by D3 and constitutes circuit, and electric capacitor C is equivalent to be connected with three phase mains, and power supply is needed to capacitance at this time
Store quadergy；When IGBT1~IGBT3 is turned off, electric capacitor C is disconnected with power supply.The circuit that IGBT4 and D4~D9 are constituted
Play the role of afterflow；IGBT4 is open-minded at this time, and the electric current of electric capacitor C is just formed into a loop by this partial circuit, and capacitance needs
Quadergy is fed back to power supply；By adjusting the service time in each switch periods T, to adjust output voltage；Six two poles
The effect of pipe is to export terminal shortcircuit when afterflow IGBT being prevented to be connected.
It is as shown in Figure 5 that three-phase and four-line point mends stepless adjustable power capacitor apparatus main circuit diagram：6 are only used in circuit
IGBT module is few using power electronic devices；The trigger signal and IGBT4 IGBT5 IGBT6 of IGBT1, IGBT2, IGBT3 are mutual
It mends, and is equipped with dead time；When IGBT1 is connected, A phases forward voltage accesses electric capacitor C1 by IGBT1, IGBT4, when
When IGBT2 is connected, B phases forward voltage accesses electric capacitor C2 by IGBT2, IGBT5, when IGBT3 is connected, the positive electricity of C phases
Pressure accesses electric capacitor C3 by IGBT3, IGBT6；When IGBT1~IGBT3 is turned off, electric capacitor is disconnected with power supply, therefore must
Freewheeling circuit must be designed, the circuit that IGBT4, IGBT5, IGBT6 are constituted plays the role of afterflow, by adjusting each switch week
Service time in phase T, to adjust output voltage.
The output voltage reference signal of computer control board output, this signal by PID regulator and output voltage signal into
Row compares, and the adjusting electric screen finally generated is compared with triangular wave, and the capacitance for needing to compensate is calculated by reactive-load compensator,
The on off state for exporting PWM drive waveforms control S1, S2 loads to change in capacitance C2 terminal voltages or the size of electric current,
Achieve the purpose that stepless capacity regulation.
Systematic schematic diagram is as shown in Figure 6：The exchange apparatus for adjusting capacity of IGBT controls is controlled using newest microcontroller,
With AC chopper for main circuit part, according to point of the non-complementary chop control AC voltage adjusting capacity transfer operation principle of sampling
Analysis, the monocycle close-loop control mode that control circuit uses, basic function are to realize that the PWM of output voltage is adjusted, progress voltage,
Current sample, overcurrent protection etc..Filter circuit is mainly used for filtering out harmonic pollution, the output voltage of sine wave when obtaining almost.
In conclusion the present invention it is constant can to reach power factor according to power factor PID/feedback step-less adjustment reactive power
For 1 purpose, ms grades of response speed；The present invention, which also has, controls that simple, small, light weight and cost is low and step-less adjustment
The characteristics of, while the reactive power compensator of various different occasions can be suitable for, have the advantages that strong applicability；Built in the present apparatus
Reactive power calculating circuit, control and display circuit more parallel-operation expansions or can reduce the cost with intelligent capacitor and machine.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (5)
1. a kind of stepless adjustable apparatus for adjusting capacity controlled using IGBT, which is characterized in that described including filtering input module Ui
Filtering input module Ui is connected with filter circuit, and the filter circuit is connected with S1-IGBT switch modules, and the S1-IGBT is opened
It closing module and is connected with inductance L2, the inductance L2 connection electric capacitors C2, the electric capacitor C2 are connect with filter circuit,
In, S2-IGBT afterflow modules are connected in parallel between the S1-IGBT switch modules and electric capacitor C2.
2. a kind of stepless adjustable apparatus for adjusting capacity controlled using IGBT according to claim 1, which is characterized in that the filter
Wave circuit includes inductance L1, the upper end of the left end connection filtering input module Ui of the inductance L1, the right end point of the inductance L1
Not Lian Jie capacitance C1 upper end and S1-IGBT switch modules left end, the lower end connection filtering input module Ui of the capacitance C1
Lower end.
3. a kind of stepless adjustable apparatus for adjusting capacity controlled using IGBT according to claim 1, which is characterized in that described
S1-IGBT switch modules include transistor IGBT 1, and the collector of the transistor IGBT 1 is separately connected the negative of diode VD1
Pole, the left end of capacitance VC1 and inductance L1 right end, the emitter of the transistor IGBT 1 is separately connected the hair of transistor IGBT 2
The left end of emitter-base bandgap grading, the anode of diode VD1, the anode of diode VD2, the right end of capacitance VC1 and capacitance VC2, the transistor
The collector of IGBT2 is separately connected the left end of the cathode of diode VD2, the right end of capacitance VC2 and inductance L2.
4. a kind of stepless adjustable apparatus for adjusting capacity controlled using IGBT according to claim 1, which is characterized in that described
S2-IGBT afterflow modules include transistor IGBT 3, and the collector of the transistor IGBT 3 is separately connected the negative of diode VD3
The left end of pole, the upper end of capacitance VC3 and inductance L2, the emitter of the transistor IGBT 3 are separately connected the hair of transistor IGBT 4
Emitter-base bandgap grading, the anode of diode VD3, the anode of diode VD4, the lower end of capacitance VC3 and capacitance VC4 upper end, the transistor
The collector of IGBT4 be separately connected the cathode of diode VD4, the lower end of capacitance VC4 and electric capacitor C2 lower end.
5. a kind of stepless adjustable apparatus for adjusting capacity controlled using IGBT according to claim 1, which is characterized in that the electricity
Feel the upper end of the right end connection electric capacitor C2 of L2, the lower end of the lower end connection capacitance C1 of the electric capacitor C2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810110760.6A CN108306308A (en) | 2018-02-05 | 2018-02-05 | A kind of stepless adjustable apparatus for adjusting capacity controlled using IGBT |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810110760.6A CN108306308A (en) | 2018-02-05 | 2018-02-05 | A kind of stepless adjustable apparatus for adjusting capacity controlled using IGBT |
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| CN108306308A true CN108306308A (en) | 2018-07-20 |
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| CN201810110760.6A Pending CN108306308A (en) | 2018-02-05 | 2018-02-05 | A kind of stepless adjustable apparatus for adjusting capacity controlled using IGBT |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109066819A (en) * | 2018-09-25 | 2018-12-21 | 中国人民解放军军事科学院国防工程研究院 | A kind of idle work optimization method of the power distribution network based on case reasoning |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101232254A (en) * | 2008-02-27 | 2008-07-30 | 中国农业大学 | Power transformer |
| CN203166533U (en) * | 2013-04-01 | 2013-08-28 | 四川华仪电器有限公司 | Stepless reactive power compensation device with individual phase control |
| CN203399045U (en) * | 2013-05-28 | 2014-01-15 | 扬州大学 | Chopper-control speed regulation and energy conservation device for asynchronous motor |
-
2018
- 2018-02-05 CN CN201810110760.6A patent/CN108306308A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101232254A (en) * | 2008-02-27 | 2008-07-30 | 中国农业大学 | Power transformer |
| CN203166533U (en) * | 2013-04-01 | 2013-08-28 | 四川华仪电器有限公司 | Stepless reactive power compensation device with individual phase control |
| CN203399045U (en) * | 2013-05-28 | 2014-01-15 | 扬州大学 | Chopper-control speed regulation and energy conservation device for asynchronous motor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109066819A (en) * | 2018-09-25 | 2018-12-21 | 中国人民解放军军事科学院国防工程研究院 | A kind of idle work optimization method of the power distribution network based on case reasoning |
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Application publication date: 20180720 |