CN107800348A - A kind of electric terminal drive electrical equipment - Google Patents
A kind of electric terminal drive electrical equipment Download PDFInfo
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- CN107800348A CN107800348A CN201711262743.6A CN201711262743A CN107800348A CN 107800348 A CN107800348 A CN 107800348A CN 201711262743 A CN201711262743 A CN 201711262743A CN 107800348 A CN107800348 A CN 107800348A
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- compensating
- module
- output end
- input
- power source
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/26—Power factor control [PFC]
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- Power Engineering (AREA)
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Abstract
The present invention relates to a kind of power back-off equipment, in particular it is that a kind of electric terminal drives electrical equipment, including sampling module SIG E, main power source input La, Voltage stabilizing module T, power detecting module, reference ground end N, master controller, compensating switch KM, compensating module CR and main power source output end Lb, the main power source input La accesses three-phase alternating current, the power output end connection sampling module SIG E of Voltage stabilizing module T power input, input of the output end of the reference ground end N and power detecting module respectively with sampling module SIG E is connected, the main power source input La connects with main power source output end Lb.The present invention can improve the power factor of whole electricity system, can reduce the load current of distribution transformer, distribution line, so as to reduce unwanted losses, have higher economic use value, safe and easy for installation.
Description
Technical field
The present invention relates to a kind of power back-off equipment, is in particular that a kind of electric terminal drives electrical equipment.
Background technology
AND ENERGY RESOURCES CONSUMPTION IN CHINA total amount is in ascendant trend, wherein industrial energy consumption account for national energy resource consumption year by year at present
70% or so of total amount, motor are the main power consumption terminal of industrial circle again, and electricity consumption accounts for the 75% of commercial power total amount.
Motor has two kinds of operating modes of speed governing and not speed governing in the application, accounts for more than 60% energy consumption for not needing speed regulating control motor
Problem is almost ignored by people, and most not bunchers have protection simply, lacks accident analysis and record, inefficient
Operation, the problem of waste of energy is serious.
It is widely used at present that shunt capacitor is installed in switchgear house transformer low voltage outlet side, produced to offset inductive load
Reactive loss, but the reactive loss of motor circuit can not be offset, and entirely compensate amount control in relatively low model
In enclosing (0.9-0.95), in order to avoid overcompensation.
Such as number of patent application is that a kind of of CN201620742672.4 drives electrical equipment, including drive circuit board and periphery electricity
Road, wherein drive circuit board include：Power detecting end, power input, SCR control end, current transformer end, radiation air
Fan control terminal, Voltage stabilizing module T and single-chip microcomputer；Power input is connected by the power input pin of Voltage stabilizing module T and single-chip microcomputer
Connect；Peripheral circuit includes：Reverse-blocking tetrode thyristor, reactive power compensation circuit, fuse and inductor；The control terminal of reverse-blocking tetrode thyristor with
The SCR control end connection of drive circuit board；The input of reverse-blocking tetrode thyristor is connected with fuse；The output of reverse-blocking tetrode thyristor
End is connected with reactive power compensation circuit；Inductor is connected with current transformer end；Output end and nothing of the inductor in reverse-blocking tetrode thyristor
Mutual inductance occurs for the junction of work(compensation circuit.The invention can not carry out power back-off exactly according to the operating mode of motor.
The content of the invention
It is an object of the invention to provide a kind of electric terminal with electrical equipment is driven, can improve the power of whole electricity system because
Number, can reduce the load current of distribution transformer, distribution line, so as to reduce unwanted losses, reduce whole supply line
Temperature rise, there is higher economic use value, improve the security of supply line.
The purpose of the present invention is achieved through the following technical solutions：
A kind of electric terminal drive electrical equipment, including sampling module SIG-E, main power source input La, Voltage stabilizing module T, power supply
Detection module, reference ground end N, master controller, compensating switch KM, compensating module CR and main power source output end Lb, the main electricity
Source input La accesses three-phase alternating current, the power output end connection sampling module SIG-E of Voltage stabilizing module T power input
Input of the output end of end, the reference ground end N and power detecting module respectively with sampling module SIG-E is connected, described
Main power source input La connects with main power source output end Lb, the output end connection master controller of the sampling module SIG-E, master control
The output end connection compensating switch KM of device processed control terminal, one end of the compensating switch KM is connected to power detecting module and master
Between power output end Lb, the other end connection compensating module CR of the compensating switch KM.
As the further optimization of the technical program, a kind of electric terminal of present invention drive electrical equipment, the power detecting mould
Block includes voltage detecting end FU and idle test side TA, and the input of the voltage detecting end FU includes three voltage detecting end FU
Son, three voltage detecting end FU connect three power transmission lines of three-phase alternating current respectively, and the idle test side TA includes three
Idle test side TA, three idle test side TA are provided with inductance coil, and three inductance coils are wrapped in main electricity respectively
On the input La of source on three power transmission lines of three-phase alternating current, the voltage detecting end FU and idle test side TA output end point
Not Lian Jie sampling module SIG-E input.
As the further optimization of the technical program, a kind of electric terminal of present invention drive electrical equipment, the sampling module
SIG-E output end is connected with LCD display module.
As the further optimization of the technical program, a kind of electric terminal of present invention drive electrical equipment, the compensating switch KM
Input be provided with fuse.
As the further optimization of the technical program, a kind of electric terminal of the present invention, which is used, drives electrical equipment, in the master controller
Portion is provided with clock timing module.
As the further optimization of the technical program, a kind of electric terminal of present invention drive electrical equipment, the compensating module CR
Including multiple compensators, three groups of compensating electric capacities are provided with compensator, the compensating electric capacity is composed in parallel by multiple electric capacity, compensation
Resistance is connected in parallel on electric capacity.
As the further optimization of the technical program, for a kind of electric terminal of the present invention with electrical equipment is driven, three groups of compensation are electric
The input of appearance is connected with compensating switch KM, and the output end of the input of first group of compensating electric capacity and the 3rd group of compensating electric capacity connects
Connect, the output end of first group of compensating electric capacity is connected with the input of second group of compensating electric capacity, the output end of second group of compensating electric capacity
It is connected with the input of the 3rd group of compensating electric capacity.
A kind of electric terminal of the present invention drives having the beneficial effect that for electrical equipment：
A kind of electric terminal of the present invention is provided with sampling module SIG-E, power detecting module and compensating switch with electrical equipment is driven
KM, can be according to power supply quality and the accurate control compensating module CR of production technology change work, it is possible to prevente effectively from parallel humorous
Harmonic of shaking scale-up problem；LCD display module is provided with, can be with the working condition of display circuit system, current motor load
Rate, and four-quadrant show power, are easy to personnel to check understanding；Fuse is provided with, effectively can prevent supply voltage from overloading
Compensating switch KM or compensating module CR is caused to damage；When the frequent start-stop of motor, master controller is interrupted by clocking capability to be mended
Module CR work is repaid, can effectively prevent from compensating excessive, the problem of motor voltage overloads, can be to frequency, voltage, electricity
Stream, power, power factor, current/voltage degree of unbalancedness, load characteristic, voltage/current percent harmonic distortion, requirement, the ginseng of phase sequence
Number sets out-of-limit, is alarmed and records time of origin and the motor running time of alert event.
Brief description of the drawings
The present invention will be further described in detail with specific implementation method below in conjunction with the accompanying drawings.
Fig. 1 is the hardware architecture diagram of the present invention；
Fig. 2 is the integrated circuit schematic diagram of the present invention；
Fig. 3 is compensating module CR in part of the present invention circuit theory diagrams；
Fig. 4 is sampling module SIG-E of the present invention elementary diagram；
Fig. 5 is the pin schematic diagram of master controller of the present invention；
Fig. 6 is the communication module partial schematic diagram one between master controller and sampling module SIG-E of the present invention；
Fig. 7 is the communication module partial schematic diagram two between master controller and sampling module SIG-E of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
Embodiment one：
With reference to Fig. 1-6 illustrate present embodiment, below description be merely illustrative, never be used as to the present invention and
Its any restrictions applied or used, it should be noted that：Similar label and letter represents similar terms in following accompanying drawing.
A kind of electric terminal drive electrical equipment, including sampling module SIG-E, main power source input La, Voltage stabilizing module T, power supply
Detection module, reference ground end N, master controller, compensating switch KM, compensating module CR and main power source output end Lb, the main electricity
La1, La2 and La3 terminal on the input La of source connects A, B and C three-phase line of three-phase alternating current, the Voltage stabilizing module respectively
T be used as system light current power supply by AC-DC rectification and decompression, and Voltage stabilizing module T can use the battery that handles and
Corresponding voltage-stabilizing device, Voltage stabilizing module T power output end connection sampling module SIG-E power input, the benchmark connect
Input of the output end of ground terminal N and power detecting module respectively with sampling module SIG-E is connected, and reference ground end N is as survey
Measuring voltage and detect the reference voltage of alternating current sine frequency spectrum, the main power source input La connects with main power source output end Lb,
Described main power source output end Lb includes Lb1, Lb2 and Lb3, and the output end connection master controller of the sampling module SIG-E is main
The output end connection compensating switch KM of controller control terminal, the compensating switch KM is the CK3 collection of contact devices in Changshu, is compensated
Switch KM control signal input and master controller signal output part connect, compensating switch KM include be connected in parallel 1KM,
2KM, 3KM and 4KM, sampling module SIG-E calculate magnitude of voltage, reactive power and circuit according to the input data of power detecting module
Power factor, and to be transferred to master controller, this foundation as control compensating switch KM of master controller, the compensating switch KM
One end be connected between power detecting module and main power source output end Lb, the other end of compensating switch KM connection compensation mould
Block CR；When power input voltage is relatively low, to ensure electricity consumption motor normal work, main controller controls compensating switch KM disconnects,
A series of problems, such as compensating more degree causes capacitors self-healing to strengthen, and capacitance loss is accelerated, and capacitor fails ahead of time is prevented, works as sampling
Module SIG-E by be calculated system voltage it is stable and enough motor operation, motor is idle increase when, master controller control
Compensating switch KM processed is connected, and compensating module CR access circuits, can supply the part reactive power of inductive reactance consumption, can with this
Reduce distribution transformer, the load current of distribution line；The conductor cross-section area of distribution line can be reduced, reduce enterprise's distribution and become
The capacity of depressor, reduce enterprise's distribution transforming and the active loss of distribution network；, can be with because the present apparatus is arranged on distribution line terminal
By way of reducing whole supply line's electric current, reduce transmission losses, there is maximized non-work economic equivalent；Mending simultaneously
In the presence of repaying module CR, the starting current of motor can be reduced, the startup loss of motor is reduced, is advantageous to improve electronic
The service life of machine, the model STM32F103C8T6 for the controller chip that the master controller uses, the sampling module
SIG-E model Acuvim II type three-phase power detection devices, Acuvim II series multifunctionals network electric power instrument use
Most modern microprocessor and Digital Signal Processing designs.Gather comprehensive three phase electrical/display, energy tires out
Meter, power quality analysis, fault alarm, trend record, quality of power supply logout, waveform recording, time-sharing measurement and network lead to
Letter is.Giant-screen, high-resolution liquid crystal display fully meet your vision requirement, graceful, bright backlight show make you
Also measurement data can be easily consulted under faint light；Acuvim II series of products can be used as instrument to be used alone, and substitute a large amount of pass
The simulation instrument of system, can act also as the anterior member of electric power monitoring system, to realize remote data acquisition and control；Acuvim
II series instruments are due to introducing Digital Signal Processing so that online power quality analysis becomes possibility.Each phase
The total harmonic distortion factor of voltage, electric current, voltage crest factor, current coefficient, each harmonic component and voltage, current unbalance factor
It can in real time measure, master control is realized by the RS-485 communication interfaces built in Acuvim II series multifunctional network electric power instruments
Communication between device and sampling module SIG-E processed.
The power detecting module includes voltage detecting end FU and idle test side TA, the input of the voltage detecting end FU
End includes three voltage detecting end FU FU1, FU2 and FU3, and three voltage detecting end FU FU1, FU2 and FU3 connect three respectively
Three power transmission lines of cross streams electricity, the idle test side TA include three idle test side TA TAa, TAb and TAc, three
Inductance coil is provided with idle test side TA TAa, TAb and TAc, three inductance coils are wrapped in main power source input respectively
On three power transmission lines for holding the three-phase alternating current on La, three idle test side TA TAa, TAb and TAc were powered in alternating current
Corresponding induced electromotive force is produced in journey, in this, as the sinusoidal spectrum signal of alternating current, the voltage detecting end FU and idle
Test side TA output end connects sampling module SIG-E input respectively, and sampling module SIG-E passes through this signal calculation circuit
Power factor, the control foundation for connecting compensating switch KM whether is controlled as master controller.
The output end of the sampling module SIG-E is connected with LCD display module, and sampling module SIG-E will be calculated
Magnitude of voltage, power factor, useful work and idle work numerical value, which are sent in LCD display module, to be shown, is easy to plant maintenance personnel real
When check and understand working state of system.
The input of the compensating switch KM is provided with fuse 1FU and 2FU, thereby protects compensating module CR inner capacitors
The electric current breakdown that part is not overloaded, can protect compensating switch KM and compensating module CR, improve capacitance component in compensating module CR
Service life.
For needing frequent starting and stopping motor, because motor is risen in the changing-over of power supply two-phase or quickly, frequently or the stopping time,
Motor is still operated with higher rotation speed because of inertia after dump, and the capacitor of compensation turns into motor magnetoelectricity by electric discharge
Stream, makes electric motor operation in generating state.The voltage that now motor is sent and the general phase of supply voltage and then put into
Difference, will produce big impact torque in a flash, compensating module CR and motor damages be caused with this, to avoid problems from sending out
Raw, heretofore described master controller is internally provided with clock timing module, and master controller records the motor starting and stopping time, and
Time cumulation is carried out by clock timing module, increases time threshold Tmin in main controller controls program, such as motor two
The secondary difference for starting time and a downtime before motor is less than time threshold Tmin, then control disconnects compensating switch KM,
This starts compensating module CR and is not involved in work；Such as the difference of a downtime before motor restarting time and motor
More than time threshold Tmin, then control connects compensating switch KM, makes compensating module CR normal works；The time threshold Tmin should
Electric capacity electricity in the complete consumption and compensation module CR of resistance in adequate remedy module CR；Can also to frequency, voltage, electric current, power,
Power factor, current/voltage degree of unbalancedness, load characteristic, voltage/current percent harmonic distortion, requirement, the parameter setting of phase sequence are got over
Limit, alarmed and record time of origin and the motor running time of alert event.
The compensating module CR includes multiple compensators, and three groups of compensating electric capacities, the compensating electric capacity are provided with compensator
Composed in parallel by multiple electric capacity, resistance is connected in parallel in compensating electric capacity；When idle increase in circuit, compensating module CR starts
Work, multiple electric capacity trickle charges, electric discharge are most of to the reactive current needed for motor to be supplied by multiple electric capacity, can with this
To improve the power factor of whole supply line, resistance in parallel is used to make in consumption electric capacity in motor failure in compensating electric capacity
The electric energy of storage, two voltage superpositions cause the voltage overload of motor when preventing next be powered.
The input of three groups of compensating electric capacities is connected with compensating switch KM, the input and the 3rd of first group of compensating electric capacity
The output end connection of group compensating electric capacity, the output end of first group of compensating electric capacity are connected with the input of second group of compensating electric capacity, the
The output end of two groups of compensating electric capacities is connected with the input of the 3rd group of compensating electric capacity, and the discharge and recharge that each electric capacity can be improved with this is imitated
Rate, and be advantageous to the electric energy for making quick consumption capacitor memory storage in shutdown.
A kind of electric terminal of present invention drive electrical equipment, its operation principle are：The present apparatus is arranged on electricity consumption motor just
Inlet side, when power input voltage is relatively low, to ensure electricity consumption motor normal work, main controller controls compensating switch KM disconnects,
A series of problems, such as compensating more degree causes capacitors self-healing to strengthen, and capacitance loss is accelerated, and capacitor fails ahead of time is prevented, works as master control
When device processed is by the increase that is calculated that system voltage is stable and motor operates, motor is idle enough, main controller controls compensation
Switch KM to connect, compensating module CR access circuits, the part reactive power of inductive reactance consumption can be supplied, can be reduced and matched somebody with somebody with this
The load current of piezoelectric transformer, distribution line；The conductor cross-section area of distribution line can be reduced, reduce enterprise's distribution transformer
Capacity, reduce enterprise's distribution transforming and the active loss of distribution network；, can be by subtracting because the present apparatus is arranged on distribution line terminal
The mode of few whole supply line's electric current, reduces transmission losses, has maximized non-work economic equivalent；Simultaneously in compensating module
In the presence of CR, the starting current of motor can be reduced, the startup loss of motor is reduced, is advantageous to improve making for motor
Use the life-span；For needing frequent starting and stopping motor, because motor is risen in the changing-over of power supply two-phase or quickly, frequently or the stopping time, when
Motor is still operated with higher rotation speed because of inertia after dump, and the capacitor of compensation turns into motor magnetoelectricity by electric discharge
Stream, makes electric motor operation in generating state.The voltage that now motor is sent and the general phase of supply voltage and then put into
Difference, will produce big impact torque in a flash, compensating module CR and motor damages be caused with this, to avoid problems from sending out
Raw, heretofore described master controller is internally provided with clock timing module, and master controller records the motor starting and stopping time, and
Time cumulation is carried out by clock timing module, increases time threshold Tmin in main controller controls program, such as motor two
The secondary difference for starting time and a downtime before motor is less than time threshold Tmin, then control disconnects compensating switch KM,
This starts compensating module CR and is not involved in work；Such as the difference of a downtime before motor restarting time and motor
More than time threshold Tmin, then control connects compensating switch KM, makes compensating module CR normal works；The time threshold Tmin should
Electric capacity electricity in the complete consumption and compensation module CR of resistance in adequate remedy module CR.
Certainly, described above is not limitation of the present invention, and the present invention is also not limited to the example above, the art
The variations, modifications, additions or substitutions that those of ordinary skill is made in the essential scope of the present invention, fall within the guarantor of the present invention
Protect scope.
Claims (7)
1. a kind of electric terminal drive electrical equipment, including the inspection of sampling module SIG-E, main power source input La, Voltage stabilizing module T, power supply
Survey module, reference ground end N, master controller, compensating switch KM, compensating module CR and main power source output end Lb, it is characterised in that：
The main power source input La accesses three-phase alternating current, the power output end connection sampling module SIG-E's of the Voltage stabilizing module T
The output end of power input, the reference ground end N and power detecting module connects with sampling module SIG-E input respectively
Connect, the main power source input La connects with main power source output end Lb, the output end connection main control of the sampling module SIG-E
Device, the output end connection compensating switch KM of master controller control terminal, one end of the compensating switch KM is connected to power detecting
Between module and main power source output end Lb, the other end connection compensating module CR of the compensating switch KM.
A kind of 2. electric terminal according to claim 1 drive electrical equipment, it is characterised in that：The power detecting module includes
Voltage detecting end FU and idle test side TA, the voltage detecting end FU input include three voltage detecting end FU, and three
Individual voltage detecting end FU connects three power transmission lines of three-phase alternating current on main power source input La, the idle test side respectively
TA includes three idle test side TA, and three idle test side TA are provided with inductance coil, three inductance coil difference
It is wrapped on three power transmission lines of three-phase alternating current, the voltage detecting end FU and idle test side TA output end connect respectively
Sampling module SIG-E input.
A kind of 3. electric terminal according to claim 1 drive electrical equipment, it is characterised in that：The sampling module SIG-E's
Output end is connected with LCD display module.
A kind of 4. electric terminal according to claim 1 drive electrical equipment, it is characterised in that：The input of the compensating switch KM
End is provided with fuse.
A kind of 5. electric terminal according to claim 1 drive electrical equipment, it is characterised in that：Set inside the master controller
There is clock timing module.
A kind of 6. electric terminal according to claim 1 drive electrical equipment, it is characterised in that：The compensating module CR includes more
Individual compensator, three groups of compensating electric capacities is provided with compensator, the compensating electric capacity is composed in parallel by multiple electric capacity, in compensating electric capacity
It is connected in parallel to resistance.
A kind of 7. electric terminal according to claim 6 drive electrical equipment, it is characterised in that：Three groups of compensating electric capacities it is defeated
Entering end to be connected with compensating switch KM, the input of first group of compensating electric capacity is connected with the output end of the 3rd group of compensating electric capacity, and first
The output end of group compensating electric capacity is connected with the input of second group of compensating electric capacity, the output end of second group of compensating electric capacity and the 3rd group
The input connection of compensating electric capacity.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711048600 | 2017-10-31 | ||
| CN2017110486005 | 2017-10-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107800348A true CN107800348A (en) | 2018-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711262743.6A Pending CN107800348A (en) | 2017-10-31 | 2017-12-04 | A kind of electric terminal drive electrical equipment |
| CN201721664607.5U Active CN207427023U (en) | 2017-10-31 | 2017-12-04 | A kind of electric terminal drive electric appliance |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721664607.5U Active CN207427023U (en) | 2017-10-31 | 2017-12-04 | A kind of electric terminal drive electric appliance |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108471117A (en) * | 2018-04-13 | 2018-08-31 | 哈尔滨兴亚技术有限公司 | A kind of device improving electricity system efficiency |
| CN109473986A (en) * | 2019-01-22 | 2019-03-15 | 河南城建学院 | A kind of distribution method digitizing low-energy-consumption high-efficiency |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107800348A (en) * | 2017-10-31 | 2018-03-13 | 哈尔滨兴亚技术有限公司 | A kind of electric terminal drive electrical equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2089215U (en) * | 1991-02-09 | 1991-11-20 | 锦州电力电容器厂金属化电容器厂 | Multifunction reactive power on-site compesator for motor |
| CN106026837A (en) * | 2016-07-14 | 2016-10-12 | 哈尔滨兴亚技术有限公司 | Power driver |
| CN206302161U (en) * | 2017-01-11 | 2017-07-04 | 哈尔滨理工大学 | A kind of power network low pressure harmonics restraint and reactive power compensator |
| CN207427023U (en) * | 2017-10-31 | 2018-05-29 | 哈尔滨兴亚技术有限公司 | A kind of electric terminal drive electric appliance |
-
2017
- 2017-12-04 CN CN201711262743.6A patent/CN107800348A/en active Pending
- 2017-12-04 CN CN201721664607.5U patent/CN207427023U/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2089215U (en) * | 1991-02-09 | 1991-11-20 | 锦州电力电容器厂金属化电容器厂 | Multifunction reactive power on-site compesator for motor |
| CN106026837A (en) * | 2016-07-14 | 2016-10-12 | 哈尔滨兴亚技术有限公司 | Power driver |
| CN206302161U (en) * | 2017-01-11 | 2017-07-04 | 哈尔滨理工大学 | A kind of power network low pressure harmonics restraint and reactive power compensator |
| CN207427023U (en) * | 2017-10-31 | 2018-05-29 | 哈尔滨兴亚技术有限公司 | A kind of electric terminal drive electric appliance |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108471117A (en) * | 2018-04-13 | 2018-08-31 | 哈尔滨兴亚技术有限公司 | A kind of device improving electricity system efficiency |
| CN109473986A (en) * | 2019-01-22 | 2019-03-15 | 河南城建学院 | A kind of distribution method digitizing low-energy-consumption high-efficiency |
| CN109473986B (en) * | 2019-01-22 | 2020-03-27 | 河南城建学院 | Digital low-energy-consumption high-efficiency power distribution method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN207427023U (en) | 2018-05-29 |
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