CN109524971A - A kind of reactive-load compensation method on intelligent distribution box - Google Patents
A kind of reactive-load compensation method on intelligent distribution box Download PDFInfo
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- CN109524971A CN109524971A CN201811642611.0A CN201811642611A CN109524971A CN 109524971 A CN109524971 A CN 109524971A CN 201811642611 A CN201811642611 A CN 201811642611A CN 109524971 A CN109524971 A CN 109524971A
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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
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
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- 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
Abstract
The present invention discloses a kind of reactive-load compensation method on intelligent distribution box, Step 1: the real-time current value I on acquisition distribution box inlet wire, and calculate current effective value Ia；Step 2: the real-time voltage value U on acquisition distribution box inlet wire, and calculate voltage effective value Ua；Step 3: calculating real-time current value I and real-time voltage value U in the phase difference Φ of zero crossing, and then power factor (PF) COS Φ is calculated；Step 4: calculating general power S according to current effective value Ia and voltage effective value Ua, active-power P and reactive power Q are calculated according to power factor (PF) COS Φ；Step 5: the target interval of setting power factor (PF) COS Φ, when the power factor (PF) COS Φ on distribution box inlet wire is more than target interval, compensating electric capacity switching is entered on distribution box inlet wire, and according to the capacitance of the difference of realtime power factor COS Φ and target interval adjustment compensating electric capacity on route.The present invention solves the technical issues of reactive loss can not be intelligently reduced on distribution box.
Description
Technical field
The present invention relates to intelligent power monitoring technology fields, and in particular to a kind of reactive compensation on intelligent distribution box
Method.
Background technique
The development of technology of Internet of things last decade is very rapid.Important component of the Internet of Things as generation information technology,
It is the third time world information industry tide after computer, internet, and has the tendency that gradually substituting conventional internet.Its
Using throughout intelligent transportation, environmental protection, municipal administration, public safety, safety home, intelligent fire, industrial detection, environment inspection
The various fields such as survey, old man's nursing, personal health, flower culture, water system detection, foodstuff traceability, enemy's situation investigation and information search.
For the huge market potential of internet of things service and development speed, it is whole to continue a comprehensively monitoring based on Internet of Things electricity consumption
Hold --- --- intelligent domestic distribution box.
Electricity consumption integrative monitoring terminal based on Internet of Things mainly includes that monitor terminal, carrier network services device and user are whole
End.Monitor terminal i.e. our equipment to be done, mainly the data acquisition and communication of circuit, later monitor terminal and operator's net
Network carries out information exchange, and server is responsible for the analysis of data, summarizes, stores and operation etc..User terminal (mobile phone, computer) can be with
It accesses to server and the publication of control command.
Intelligent domestic distribution box not long-range electric signal monitoring function and power factor (PF) automatic regulating function at present, can not
Reduce reactive loss.
Summary of the invention
It is an object of the invention to solve at least the above problems, and provide the advantages of at least will be described later.
The reactive-load compensation method that the object of the present invention is to provide a kind of on intelligent distribution box passes through the nothing of automatic switching
Function compensating electric capacity adjusts capacitance in parallel according to the power factor (PF) on route and solves distribution to reduce the reactive loss on route
The technical issues of reactive loss can not be intelligently reduced on case.
In order to realize these purposes according to the present invention and other advantages, a kind of nothing on intelligent distribution box is provided
Function compensation method, comprising the following steps:
Step 1: the real-time current value I on acquisition distribution box inlet wire, and calculate current effective value Ia；
Step 2: the real-time voltage value U on acquisition distribution box inlet wire, and calculate voltage effective value Ua；
Step 3: carry out data analysis to real-time current value I and real-time voltage value U, real-time current value I and in real time is calculated
In the phase difference Φ of zero crossing and then power factor (PF) COS Φ is calculated in voltage value U；
Step 4: general power S is calculated according to current effective value Ia and voltage effective value Ua, according to power factor (PF) COS Φ
Calculate active-power P and reactive power Q；
Step 5: the target interval of setting power factor (PF) COS Φ, when the power factor (PF) COS Φ on distribution box inlet wire is more than
When the target interval, compensating electric capacity switching is entered on distribution box inlet wire, and according to realtime power factor COS Φ on route and institute
The difference for stating target interval adjusts the capacitance of the compensating electric capacity, until adjusting the power factor (PF) COS Φ on route to described
In target interval.
Preferably, one signal acquisition circuit of construction, the signal acquisition circuit include:
Several concatenated divider resistances, first divider resistance connect firewire end of incoming cables, the last one described partial pressure
Resistance connects the non-inverting input terminal of a first comparator, and the output end of the first comparator is connected to voltage acquisition end；
Voltage sample resistance, first end connect the non-inverting input terminal of the first comparator, the voltage acquisition resistance
Second end connect the first power end, first power end connects zero curve end of incoming cables；
First bleeder circuit comprising concatenated two resistance, the first electricity of first end connection of first bleeder circuit
Source, the second end of first bleeder circuit connect the output end of the first comparator, in first bleeder circuit
Between end connect the inverting input terminal of the first comparator；
Current sampling resistor, is connected on the zero curve end of incoming cables, the first end connection 1 of the current sampling resistor the
The output end of the non-inverting input terminal of two comparators, second comparator is connected to current acquisition end；
Second bleeder circuit comprising concatenated two resistance, the first electricity of first end connection of second bleeder circuit
Source, the second end of second bleeder circuit connect the output end of second comparator, in second bleeder circuit
Between end connect the inverting input terminal of second comparator.
Preferably, the power end of the first comparator and the second comparator is connected to second source end, first electricity
The voltage value of source is the half of second source terminal voltage value.
Preferably, A/D sampling, the calculation method of the real-time current value I are carried out to the real-time current I are as follows:
I=(IAD/X*VCC-VCC/2)/(1+R3/R2)/Ris；
Wherein, X is A/D full scale numerical value, and the instant A/D data of electric current are IAD, and VCC is second source terminal voltage value,
Ris is current sampling resistor, and R3, R2 are two resistance in the second bleeder circuit.
Preferably, A/D sampling, the calculation method of the real-time voltage value U are carried out to the real-time current U are as follows:
U=(UAD/X*VCC-VCC/2)/(1+R11/R10) * (R5+R6+R7+R8+R9)/R9；
Wherein, the instant A/D data of voltage are UAD, and VCC is second source terminal voltage value, and R9 is voltage sample resistance,
R11, R10 are two resistance in the first bleeder circuit, and R5-R9 is the divider resistance.
Preferably, in step 1, the calculation method of the current effective value Ia are as follows:
The calculation method of the voltage effective value Ua are as follows:
Wherein, In is collected each real-time current value in a cycle, and Un is in a cycle, collected each
A real-time voltage value, the data amount check of a cycle A/D acquisition are N.
Preferably, in step 3, zero passage point moment is UAD and IAD from the time point of X/2 transition, is divided into positive zero passage and bears
Zero passage respectively corresponds voltage, 0 degree of electric current and 180 degree；Three zero crossings that positioning is found rise as a cycle data
Point, 180 degree and terminal, and then calculate period, frequency, virtual value.
Preferably, in step 5, the different compensating electric capacity of multiple capacitances in parallel on the distribution box inlet wire is each described
The capacitance size of compensating electric capacity is set according to the general power size of perception electric appliances all on the distribution box inlet wire.
Preferably, the target interval of power factor (PF) COS Φ is set between inductive 0.9-1, calculates current line
On power factor (PF) COS Φ, when power factor (PF) COS Φ be more than the target interval when, calculate needed for cut compensating electric capacity hold
It is worth size, power factor (PF) COS Φ is adjusted between inductive 0.9-1, the calculation method of compensating electric capacity capacitance are as follows:
Wherein, C is compensating electric capacity,To compensate preceding power-factor angle,For power-factor angle after compensation, P is currently to have
Function power, U are network voltage.
Preferably, according to the compensating electric capacity capacitance C being calculated, the switched amount and size of the compensating electric capacity are adjusted,
So that the capacitance in parallel of output is consistent with compensating electric capacity capacitance C.
Compared with prior art, the beneficial effect that the present invention includes is:
1, the present invention can remotely monitor the electric signal on distribution box, facilitate terminal monitoring and control；
2, the power factor (PF) on monitoring route automatically, when power factor over range, automatic switching compensating electric capacity is by route
On power control in zone of reasonableness, reduce the reactive loss on route.
Further advantage, target and feature of the invention will be partially reflected by the following instructions, and part will also be by this
The research and practice of invention and be understood by the person skilled in the art.
Detailed description of the invention
Fig. 1 is power circuit diagram；
Fig. 2 is signal acquisition circuit figure.
Specific embodiment
Present invention will be described in further detail below with reference to the accompanying drawings, to enable those skilled in the art referring to comment
It can implement accordingly.
The reactive-load compensation method that the present invention provides a kind of on intelligent distribution box constructs electrical signal collection electricity first
Monitoring result in order to carry out real-time monitoring to the electric signal on route, and is sent to distance terminal, realizes long-range prison by road
Control.
As shown in Figs. 1-2, which includes:
Several concatenated divider resistance R5-R8, first divider resistance R5 connection firewire end of incoming cables, the last one institute
The non-inverting input terminal of one first comparator OP1 of divider resistance R8 connection is stated, the output end of the first comparator OP1 passes through resistance
R12 is connected to voltage acquisition end.
Voltage sample resistance R9, first end connect the non-inverting input terminal of the first comparator OP1, the voltage acquisition
The second end of resistance R9 connects the first power end VCC/2, the first power end VCC/2 connection zero curve end of incoming cables, voltage sample
One capacitor C9 of the both ends resistance R9 parallel connection.
First bleeder circuit comprising the first end of concatenated two resistance R10 and R11, the R10 connect the first power supply
VCC/2 is held, the second end of the R11 connects the output end of the first comparator OP1, and the R10 is connected with the intermediate ends of R11
The inverting input terminal of the first comparator OP1.
Current sampling resistor Ris, is connected on the zero curve end of incoming cables, and the first end of the current sampling resistor Ris is logical
Cross the non-inverting input terminal of one second comparator OP2 of resistance R1 connection, resistance R1 second end and current sampling resistor Ris first end two
One capacitor C7 of parallel connection is held, the output end of the second comparator OP2 is connected to current acquisition end by resistance R4.
Second bleeder circuit comprising the first end of concatenated two resistance R2 and R3, the R2 connect the first power end
VCC/2, the second end of the R3 connect the output end of the second comparator OP2, described in the R2 is connected with the intermediate ends of R3
The inverting input terminal of second comparator OP2.
Wherein, the first comparator OP1 and the second comparator OP2 is connected to second source end VCC, first power supply
The voltage value at end is the half of second source terminal voltage value.Power circuit is as shown in Figure 1, the first three-terminal voltage-stabilizing module output second
Power end VCC, the second three-terminal voltage-stabilizing module export the first power end VCC/2.
Reactive-load compensation method on intelligent distribution box specifically includes the following steps:
Step 1: the real-time current value I on acquisition distribution box inlet wire, and calculate current effective value Ia；To described real-time
Electric current I carries out A/D sampling, the calculation method of the real-time current value I are as follows:
I=(IAD/X*VCC-VCC/2)/(1+R3/R2)/Ris；
Wherein, X is A/D full scale numerical value, and the instant A/D data of electric current are IAD, and VCC is second source terminal voltage value,
Ris is current sampling resistor, and R3, R2 are two resistance in the second bleeder circuit.
In step 1, the calculation method of the current effective value Ia are as follows:
Step 2: the real-time voltage value U on acquisition distribution box inlet wire, and calculate voltage effective value Ua；To described real-time
Electric current U carries out A/D sampling, the calculation method of the real-time voltage value U are as follows:
U=(UAD/X*VCC-VCC/2)/(1+R11/R10) * (R5+R6+R7+R8+R9)/R9；
Wherein, the instant A/D data of voltage are UAD, and VCC is second source terminal voltage value, and R9 is voltage sample resistance,
R11, R10 are two resistance in the first bleeder circuit, and R5-R9 is the divider resistance.
The calculation method of the voltage effective value Ua are as follows:
Wherein, In is collected each real-time current value in a cycle, and Un is in a cycle, collected each
A real-time voltage value, the data amount check of a cycle A/D acquisition are N.
Step 3: carry out data analysis to real-time current value I and real-time voltage value U, real-time current value I and in real time is calculated
In the phase difference Φ of zero crossing and then power factor (PF) COS Φ is calculated in voltage value U；Zero passage point moment is UAD and IAD from X/2
The time point of transition is divided into positive zero passage and negative zero passage, respectively corresponds voltage, 0 degree of electric current and 180 degree；Three that positioning is found
Starting point, 180 degree and terminal of a zero crossing as a cycle data, and then calculate period, frequency, virtual value.
Step 4: general power S is calculated according to current effective value Ia and voltage effective value Ua, according to power factor (PF) COS Φ
Calculate active-power P and reactive power Q；
Step 5: the target interval of setting power factor (PF) COS Φ, when the power factor (PF) COS Φ on distribution box inlet wire is more than
When the target interval, compensating electric capacity switching is entered on distribution box inlet wire, and according to realtime power factor COS Φ on route and institute
The difference for stating target interval adjusts the capacitance of the compensating electric capacity, until adjusting the power factor (PF) COS Φ on route to described
In target interval.
In step 5, the different compensating electric capacity of multiple capacitances in parallel on the distribution box inlet wire, each compensation electricity
The capacitance size of appearance is set according to the general power size of perception electric appliances all on the distribution box inlet wire.
Preferably, the target interval of power factor (PF) COS Φ is set between inductive 0.9-1, calculates current line
On power factor (PF) COS Φ, when power factor (PF) COS Φ be more than the target interval when, calculate needed for cut compensating electric capacity hold
It is worth size, power factor (PF) COS Φ is adjusted between inductive 0.9-1, the calculation method of compensating electric capacity capacitance are as follows:
Wherein, C is compensating electric capacity,To compensate preceding power-factor angle,For power-factor angle after compensation, P is currently to have
Function power, U are network voltage.
According to the compensating electric capacity capacitance C being calculated, the switched amount and size of the compensating electric capacity are adjusted, so that output
Capacitance in parallel it is consistent with compensating electric capacity capacitance C.
From the above mentioned, the instant data of the continuous collection voltages of software and electric current, analyze data set, a cycle
The root-mean-square value of data is virtual value, and the algorithm of voltage and current is consistent.The instantaneous value I=(IAD/X*VCC-VCC/2) of electric current/
(1+R3/R2)/Ris；The instantaneous value U=(UAD/X*VCC-VCC/2) of voltage/(1+R11/R10) * (R5+R6+R7+R8+R9)/
R9。
Power factor is analyzed by the data to voltage and current, and the phase difference of zero crossing is found out, to obtain
Power factor (PF).Zero passage point moment is the time point for finding UAD and IAD from X/2 transition.It is divided into positive zero passage and negative zero passage, it is right respectively
Answer 0 degree and 180 degree of voltage and current.
When data set is analyzed, first positioning find three zero crossings, as a cycle data starting point, 180
Degree, terminal, extrapolate period, frequency, virtual value, subsequent each data are all in dynamically track angle change, just with angle
String value carries out data filtering, and filtered data are used to calculate virtual value, and the data before filtering are used to analyze the harmonic wave of power supply.
The virtual value of U and I are calculated, and then calculates general power S, and then calculates power factor (PF), reactive power, active
Power and general power.
Compensated power factor (PF) is generally set between inductive 0.9-1.When capacitance compensation, thrown so that parallel connection is multiple
The mode entered, capacitor in parallel are arranged by different values, available finer capacitance in parallel, by the power on route
Factor is accurately controlled between inductive 0.9-1, to reduce the reactive loss on route.
It follows that the present invention can remotely monitor the electric signal on distribution box, facilitate terminal monitoring and control；And it can
To monitor the power factor (PF) on route automatically, when power factor over range, automatic switching compensating electric capacity is by the power on route
Factor controlling reduces the reactive loss on route in zone of reasonableness.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easy
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and legend shown and described herein.
Claims (10)
1. a kind of reactive-load compensation method on intelligent distribution box, which comprises the following steps:
Step 1: the real-time current value I on acquisition distribution box inlet wire, and calculate current effective value Ia；
Step 2: the real-time voltage value U on acquisition distribution box inlet wire, and calculate voltage effective value Ua；
Step 3: carrying out data analysis to real-time current value I and real-time voltage value U, real-time current value I and real-time voltage are calculated
In the phase difference Φ of zero crossing and then power factor (PF) COS Φ is calculated in value U；
Step 4: calculating general power S according to current effective value Ia and voltage effective value Ua, calculated according to power factor (PF) COS Φ
Active-power P and reactive power Q out；
Step 5: the target interval of setting power factor (PF) COS Φ, when the power factor (PF) COS Φ on distribution box inlet wire is more than described
When target interval, compensating electric capacity switching is entered on distribution box inlet wire, and according to realtime power factor COS Φ on route and the mesh
The difference in mark section adjusts the capacitance of the compensating electric capacity, until adjusting the power factor (PF) COS Φ on route to the target
In section.
2. as described in claim 1 for the reactive-load compensation method on intelligent distribution box, which is characterized in that one electric signal of construction
Acquisition Circuit, the signal acquisition circuit include:
Several concatenated divider resistances, first divider resistance connect firewire end of incoming cables, the last one described divider resistance
The non-inverting input terminal of a first comparator is connected, the output end of the first comparator is connected to voltage acquisition end；
Voltage sample resistance, first end connect the non-inverting input terminal of the first comparator, and the of the voltage acquisition resistance
Two ends connect the first power end, and first power end connects zero curve end of incoming cables；
First bleeder circuit comprising the first end of concatenated two resistance, first bleeder circuit connects the first power end,
The second end of first bleeder circuit connects the output end of the first comparator, and the intermediate ends of first bleeder circuit connect
Connect the inverting input terminal of the first comparator；
Current sampling resistor is connected on the zero curve end of incoming cables, one second ratio of first end connection of the current sampling resistor
Compared with the non-inverting input terminal of device, the output end of second comparator is connected to current acquisition end；
Second bleeder circuit comprising the first end of concatenated two resistance, second bleeder circuit connects the first power end,
The second end of second bleeder circuit connects the output end of second comparator, and the intermediate ends of second bleeder circuit connect
Connect the inverting input terminal of second comparator.
3. as claimed in claim 2 for the reactive-load compensation method on intelligent distribution box, which is characterized in that described first compares
The power end of device and the second comparator is connected to second source end, and the voltage value of first power end is second source end voltage
The half of value.
4. as claimed in claim 3 for the reactive-load compensation method on intelligent distribution box, which is characterized in that the real-time electricity
It flows I and carries out A/D sampling, the calculation method of the real-time current value I are as follows:
I=(IAD/X*VCC-VCC/2)/(1+R3/R2)/Ris；
Wherein, X is A/D full scale numerical value, and the instant A/D data of electric current are IAD, and VCC is second source terminal voltage value, and Ris is
Current sampling resistor, R3, R2 are two resistance in the second bleeder circuit.
5. as claimed in claim 4 for the reactive-load compensation method on intelligent distribution box, which is characterized in that the real-time electricity
It flows U and carries out A/D sampling, the calculation method of the real-time voltage value U are as follows:
U=(UAD/X*VCC-VCC/2)/(1+R11/R10) * (R5+R6+R7+R8+R9)/R9；
Wherein, the instant A/D data of voltage are UAD, and VCC is second source terminal voltage value, and R9 is voltage sample resistance, R11,
R10 is two resistance in the first bleeder circuit, and R5-R9 is the divider resistance.
6. as claimed in claim 5 for the reactive-load compensation method on intelligent distribution box, which is characterized in that in step 1, institute
State the calculation method of current effective value Ia are as follows:
The calculation method of the voltage effective value Ua are as follows:
Wherein, In is collected each real-time current value in a cycle, and Un is collected each reality in a cycle
When voltage value, a cycle A/D acquisition data amount check be N.
7. as claimed in claim 6 for the reactive-load compensation method on intelligent distribution box, which is characterized in that in step 3, mistake
The zero point moment is UAD and IAD from the time point of X/2 transition, is divided into positive zero passage and negative zero passage, respectively corresponds voltage, 0 degree of electric current
And 180 degree；Three zero crossings that positioning is found calculate week as the starting point of a cycle data, 180 degree and terminal
Phase, frequency, virtual value.
8. as claimed in claim 7 for the reactive-load compensation method on intelligent distribution box, which is characterized in that in step 5,
The different compensating electric capacity of multiple capacitances in parallel on the distribution box inlet wire, the capacitance size of each compensating electric capacity is according to
The general power size setting of all perception electric appliances on distribution box inlet wire.
9. as claimed in claim 8 for the reactive-load compensation method on intelligent distribution box, which is characterized in that by power factor (PF)
The target interval of COS Φ is set between inductive 0.9-1, calculate current line on power factor (PF) COS Φ, when power because
When plain COS Φ is more than the target interval, the compensating electric capacity capacitance size cut needed for calculating adjusts power factor (PF) COS Φ
Between to inductive 0.9-1, the calculation method of compensating electric capacity capacitance are as follows:
Wherein, C is compensating electric capacity,To compensate preceding power-factor angle,For power-factor angle after compensation, P is current wattful power
Rate, U are network voltage.
10. as claimed in claim 9 for the reactive-load compensation method on intelligent distribution box, which is characterized in that according to calculating
The compensating electric capacity capacitance C arrived, adjusts the switched amount and size of the compensating electric capacity, so that the capacitance in parallel of output and compensation electricity
It is consistent to hold capacitance C.
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| CN201811642611.0A CN109524971A (en) | 2018-12-29 | 2018-12-29 | A kind of reactive-load compensation method on intelligent distribution box |
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| CN201811642611.0A CN109524971A (en) | 2018-12-29 | 2018-12-29 | A kind of reactive-load compensation method on intelligent distribution box |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114895602A (en) * | 2022-05-31 | 2022-08-12 | 苏州浪潮智能科技有限公司 | Method and device for controlling power-on and power-off of intelligent power distribution unit |
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| CN101534012B (en) * | 2009-04-13 | 2011-06-15 | 温州市亿德科技有限公司 | Intelligent integrated comprehensive low-pressure distribution box |
| CN103487767A (en) * | 2013-09-11 | 2014-01-01 | 深圳市九洲电器有限公司 | Load driving circuit and electronic load |
| EP2717408A1 (en) * | 2012-10-05 | 2014-04-09 | Schneider Electric Industries SAS | Reactive power compensator |
| CN106229997A (en) * | 2016-08-16 | 2016-12-14 | 安徽众升电力科技有限公司 | A kind of reactive power compensator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101534012B (en) * | 2009-04-13 | 2011-06-15 | 温州市亿德科技有限公司 | Intelligent integrated comprehensive low-pressure distribution box |
| EP2717408A1 (en) * | 2012-10-05 | 2014-04-09 | Schneider Electric Industries SAS | Reactive power compensator |
| CN103487767A (en) * | 2013-09-11 | 2014-01-01 | 深圳市九洲电器有限公司 | Load driving circuit and electronic load |
| CN106229997A (en) * | 2016-08-16 | 2016-12-14 | 安徽众升电力科技有限公司 | A kind of reactive power compensator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114895602A (en) * | 2022-05-31 | 2022-08-12 | 苏州浪潮智能科技有限公司 | Method and device for controlling power-on and power-off of intelligent power distribution unit |
| CN114895602B (en) * | 2022-05-31 | 2024-01-16 | 苏州浪潮智能科技有限公司 | Method and device for controlling power on and power off of intelligent power distribution unit |
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Application publication date: 20190326 |