CN109193709A - A kind of 10kV becomes the low pressure single phase power supply system of 220V - Google Patents
A kind of 10kV becomes the low pressure single phase power supply system of 220V Download PDFInfo
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- CN109193709A CN109193709A CN201811244574.8A CN201811244574A CN109193709A CN 109193709 A CN109193709 A CN 109193709A CN 201811244574 A CN201811244574 A CN 201811244574A CN 109193709 A CN109193709 A CN 109193709A
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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
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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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
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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
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
The invention discloses the low pressure single phase power supply systems that a kind of 10kV becomes 220V, the system comprises-two phase transformers of three-phase that sequentially connected 10kV becomes 220V, electric energy acquisition unit, imbalance regulation unit, idle regulation unit and AC-DC-AC module, three-phase voltage is converted to two-phase voltage first with transformer by the application, and electrical quantity is acquired by connection electric energy acquisition unit, the electrical quantity of acquisition is sent to uneven regulation unit and idle regulation unit, imbalance regulation unit is used to monitor the current unbalance factor between α phase and β phase, AC-DC-AC module is then adjusted biphase current, idle regulation unit is for monitoring power, AC-DC-AC module is then adjusted power in route；Two inlet wire single-phase transformer power supply modes are compared to, power supply system provided by the invention is able to solve the three-phase imbalance problem of the side 10kV, the probability that three-phase current unbalance occurs for the side 220V can be greatly reduced, the capacity of three-phase imbalance controlling device is reduced, line loss is reduced, improves power supply quality.
Description
Technical field
The present invention relates to power supply technique field, in particular to a kind of 10kV becomes the low pressure single phase power supply system of 220V.
Background technique
Three-phase alternating current (referred to as three-phase electricity): being a kind of transporting pattern of electric energy.Three-phase alternating-current supply is by three frequencies
Rate is identical, amplitude is equal, phase successively 120 ° of mutual deviation exchange potential composition power supply.There are many purposes of three-phase alternating current, work
Induction-motor load in industry mostly uses three-phase alternating current (three-phase four-wire power supply).And in daily life, the overwhelming majority uses single
Phase power supply, therefore just produce between three phase supply and single-phase electricity consumption for electricity consumption contradiction.In most cases (by electricity market
When sale of electricity power grid is powered), the acquisition of single-phase electricity is using the neutral conductor (zero among a three-phase electricity phase therein and three-phase and four-line
Line) to power supply for electrical equipment.The neutral conductor is drawn from the neutral point of three-phase electricity.Although under conditions of current power supply, by three
It is very simple easy thing that phase electricity, which directly obtains single-phase electricity, but large capacity, short radius of electricity supply, the pure single-phase load the case where
Under, this power supply mode has that the economic benefit is not high.
For large capacity, short radius of electricity supply, single phase power supply situation load intensive distribution or be distributed in line style, the prior art
There are two types of solution: first is that using three phase supply mode, then artificial mean allocation three-phase load, the problem of thus bringing
It is: 1, since the randomness of human factor and load cause low-pressure side three-phase current unbalance problem serious, 2, need to lay
A large amount of power cables, construction cost are higher；3, once the neutral conductor (N line or zero curve) broken string occurs, it is possible to part be caused to be used
The damage of electric equipment.Second is that three-phase electricity is become single-phase electricity power supply mode, is asked existing for the program using single-phase transformer mode
Topic is, since the mode of connection only takes the two-phase in the ABC three-phase of the side 10kV, for example, A, C phase, it is vacant to will lead to B phase, causes
The three-phase imbalance of the side 10kV is serious.
Summary of the invention
This application provides a kind of 10kV become 220V low pressure single phase power supply system, with solve in the prior art large capacity,
Short radius of electricity supply, load intensive are distributed or in the power supply mode meetings for using three-phase transformer in the single phase power supply situation of line style distribution
The problem for bringing more serious three-phase load unbalance and line loss serious.
In order to solve the above-mentioned technical problem the invention provides the following technical scheme:
Low-voltage power supply system includes sequentially connected-two phase transformer of three-phase, electric energy acquisition unit, uneven regulation list
First, idle regulation unit and AC-DC-AC module,
- two phase transformer of three-phase is used to three-phase voltage being converted to two-phase voltage, powers to the load；
The electric energy acquisition unit sends the electrical quantity to the uneven regulation unit and institute for acquiring electrical quantity
State idle regulation unit；
The uneven regulation unit generates current regulation instruction for receiving the electrical quantity, according to the electrical quantity,
The current regulation is sent to instruct to the AC-DC-AC module；
The Reactive-power control unit generates reactive compensation starting according to the electrical quantity and refers to for receiving the electrical quantity
It enables, sends the reactive compensation enabled instruction to the AC-DC-AC module；
The AC-DC-AC module is for receiving and executing the current regulation instruction and the reactive compensation enabled instruction.
Preferably, the electrical quantity includes: that the active power of α phase and β phase, reactive power, current effective value, voltage are effective
Value, power factor, 2-15 subharmonic current.
Preferably, the uneven regulation unit receives the electrical quantity, uses Iα、IβRespectively indicate-two phase transformation of three-phase
The current effective value of two feeder lines of depressor, uses IeThe rated current of indication transformer, using following formula calculate α phase and β phase it
Between current balance type degree:If current balance type degree is greater than 30%, the three-phase-is calculated using following formula
The load factor of two phase transformers:If the load factor of-two phase transformer of 10KV three-phase is greater than 50%, send
The current regulation is instructed to the AC-DC-AC module.
Preferably, following formula calculating current regulated quantity: 0.5* is utilized | Iα-Iβ|。
Preferably, it if any one phase power factor in α phase and β phase is less than 0.8, sends the reactive compensation starting and refers to
It enables to the AC-DC-AC module.
Preferably, the low voltage power supply system further include: harmonic wave prewarning unit, the harmonic wave prewarning unit is for receiving
The electrical quantity generates harmonic wave pre-warning signal according to the electrical quantity.
Preferably, I is usedhIt indicates harmonic current, uses I1Indicate alternating current, the harmonic wave prewarning unit utilizes following formula
Calculate harmonic current containing ratio:For odd harmonic, if the harmonic current containing ratio is greater than 10%, issue
Alarm signal；
For even-order harmonic, if the harmonic current containing ratio is greater than 2%, alarm signal is issued.
Preferably, if the AC-DC-AC module receives the current regulation instruction simultaneously and the reactive compensation is opened
Dynamic instruction preferentially executes the current regulation instruction.
The low pressure single phase power supply system that 10kV provided by the present application becomes 220V includes sequentially connected-two phase-change pressure of three-phase
Device, electric energy acquisition unit, uneven regulation unit, idle regulation unit and AC-DC-AC module ,-two phase-change pressure of three-phase
Device is used to three-phase voltage being converted to 220V two-phase voltage, powers to the load, and the electric energy acquisition unit is used to acquire electrical quantity,
The electrical quantity is sent to the uneven regulation unit and the idle regulation unit, the uneven regulation unit is for connecing
The electrical quantity is received, current regulation instruction is generated according to the electrical quantity, the current regulation is sent and instructs to the AC-DC-
AC module, the Reactive-power control unit generate reactive compensation enabled instruction for receiving the electrical quantity, according to the electrical quantity,
The reactive compensation enabled instruction is sent to the AC-DC-AC module, the AC-DC-AC module is described for receiving and executing
Current regulation instruction and the reactive compensation enabled instruction.The application turns three-phase voltage first with three phase transformation two-phase transformers
It is changed to two-phase voltage, and electrical quantity is acquired by connection electric energy acquisition unit, the electrical quantity of acquisition is sent to uneven regulation
Unit and idle regulation unit, imbalance regulation unit are used to monitor current unbalance factor between α phase and β phase, and to AC-
DC-AC module sends current regulation instruction, and AC-DC-AC module is then adjusted biphase current, and idle regulation unit is for supervising
Power scale, and reactive compensation enabled instruction is sent to AC-DC-AC module, AC-DC-AC module then adjusts power in route
Section；Two inlet wire single-phase transformer power supply modes are compared to, 10kV provided by the invention becomes the low pressure single phase power supply system of 220V,
It is able to solve the three-phase imbalance problem of the side 10kV；It is compared to three-phase transformer power supply mode, the side 220V can be greatly reduced
The probability of three-phase current unbalance occurs, and reduces the capacity of three-phase imbalance controlling device, reduces line loss, improves power supply matter
Amount.
Detailed description of the invention
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 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 the structural schematic diagram for the low pressure single phase power supply system that 10kV provided in an embodiment of the present invention becomes 220V；
Fig. 2 is the control logic figure for the low pressure single phase power supply system that 10kV provided in an embodiment of the present invention becomes 220V；
Fig. 3 is the structural representation for the low pressure single phase power supply system that the 10kV that another embodiment of the present invention provides becomes 220V
Figure.
Specific embodiment
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
Whole description, 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, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, becoming the structural representation of the low pressure single phase power supply system of 220V for 10kV provided in an embodiment of the present invention
Figure.System includes sequentially connected-two phase transformer 1 of three-phase, electric energy acquisition unit 2, uneven regulation unit 3, idle regulation
Unit 4 and AC-DC-AC module 5.
Wherein ,-two phase transformer of three-phase is used to three-phase voltage being converted to two-phase voltage, powers to the load.Three-phase-two-phase
Transformer 1 can use SCOTT type transformer, and SCOTT type transformer is a kind of special transformer, it can be by the three of power supply
Phase electricity becomes two-phase electricity, provides two-phase power supply, guarantees the three phase mains balance of power supply.SCOTT type transformer primary side there are two around
Group is connected into inverted T-shaped, two voltages between phases (such as A, C are alternate) of its bottom winding (referred to as bottom winding) access high-pressure system, another
Winding (referred to as high winding) is then connected to another phase (such as B phase) in three voltages of bottom winding central point and high pressure, bottom winding and
The turn ratio of high winding isThe identical two single-phase windings of secondary side the number of turns, it is former with inverted T-shaped respectively on space structure
Side winding is corresponding, constitutes the two-phase time polygonal voltage U for being mutually pi/2 phase differenceα, Uβ, it is segmented supply to the different contact net in two sides respectively
Electricity.When two feed segmented currents are Iα, IβWhen, by electric current no-load voltage ratio and phase transition, primary side three-phase current IA=IB=IC can be obtained
And phase is symmetrically, primary side three-phase load to be made to realize balance.- two phase transformer of 10KV three-phase can be used in concrete application
For the power supply of 220V load-side.
Electric energy acquisition unit 2 monitors power quality for acquiring electrical quantity, accurately completely electrical quantity is monitored and
Analysis, electric energy acquisition unit 2 can using single-chip microcontroller as core, peripheral hardware current/voltage input circuit, signal filtering conditioning circuit,
Data slice external storage circuit, outputting circuit for relay, phase-locking frequency multiplication circuit, power circuit etc..Wherein, current/voltage circuit is complete
At the initial acquisition of three-phase power signal, outputting circuit for relay is responsible for realizing protection act to circuit in some emergencies.
The working principle of electric energy acquisition unit 2 be tested three-phase alternating voltage and three-phase alternating current signal first pass around mutual inductor every
From transformation, then A/D converter is adjusted to through signal conditioning circuit can survey signal, be then fed into single-chip microcontroller and be converted to digital signal simultaneously
Carry out corresponding data storage.The control signal of A/D conversion is provided by single-chip microcontroller according to phaselocked loop pulse, and upper and lower computer is according to control
System instruction realizes data exchange by CAN fieldbus.The electrical quantity of acquisition is sent to uneven tune by electric energy acquisition unit 2
Control unit 3 and idle regulation unit 4.
Imbalance regulation unit 3 generates current regulation instruction for receiving electrical quantity, according to electrical quantity, sends current regulation
It instructs to AC-DC-AC module 5.Reactive-power control unit 4 generates reactive compensation starting according to electrical quantity and refers to for receiving electrical quantity
It enables, sends reactive compensation enabled instruction to AC-DC-AC module 5.AC-DC-AC module 5 refers to for receiving and executing current regulation
It enables and reactive compensation enabled instruction.The imbalance loaded between phase and phase in power supply system, not only damages distribution transformer
Increase, reduce transformer power output, and keep each phase current uneven, increases the loss of distribution line, this not only sets electric appliance
Received shipment row and safety are totally unfavorable, while increasing operating cost again.
Imbalance regulation unit 3 and idle regulation unit 4 can be by singlechip groups at the list of imbalance regulation unit 3
Current regulation program is prestored in piece machine, after receiving the electrical quantity that electric energy acquisition unit 2 is sent, electrical quantity judges based on the received
Whether current regulation instruction is generated；Similarly, the single-chip microcontroller of idle regulation unit 4 prestores Reactive-power control program, receives electric energy and adopts
After collecting the electrical quantity that unit 2 is sent, electrical quantity judges whether to generate reactive compensation enabled instruction based on the received.
AC-DC-AC module 5 refers to that cross-straight-intersection total power converter, cross-straight-intersection total power converter can will be consolidated
Fixed AC power source is transformed to the exchange output that frequency, amplitude, phase can be adjusted arbitrarily.The embodiment of the present application is using friendship-
Directly-total power converter is handed over to adjust the electric current of α phase and β phase two-phase and realize that power compensation, AC-DC-AC module 5 receive injustice
After the current regulation instruction of weighing apparatus regulation unit 3, the electric current of α phase and β phase two-phase is adjusted, so that two alternate current balance types
Degree meets preset condition.After AC-DC-AC module 5 receives the reactive compensation enabled instruction that idle regulation unit 4 issues, control is single
Phase reactive compensation, so that single-phase power meets preset condition.AC-DC-AC module is finally directly connected to load, is single-phase great Rong
Measure load-side power supply.
From the above technical scheme, it is single-phase to please refer to the low pressure that Fig. 2 is 10kV provided in an embodiment of the present invention change 220V
The control logic figure of power supply system, low pressure single phase power supply system provided by the invention include sequentially connected-two phase-change pressure of three-phase
Device 1, electric energy acquisition unit 2, uneven regulation unit 3, idle regulation unit 4 and AC-DC-AC module 5 ,-two phase transformation of three-phase
Depressor 1 is used to three-phase voltage being converted to 220V two-phase voltage, powers to the load, and electric energy acquisition unit 2 is used to acquire electrical quantity,
Transmission electrical quantity to imbalance regulation unit 3 and idle regulation unit 4, imbalance regulation unit 3 is used to receive electrical quantity, according to
Electrical quantity generates current regulation instruction, sends current regulation and instructs to AC-DC-AC module 5, Reactive-power control unit 4 is for receiving
Electrical quantity generates reactive compensation enabled instruction according to electrical quantity, sends reactive compensation enabled instruction to AC-DC-AC module 5, AC-
DC-AC module 5 is for receiving and executing current regulation instruction and reactive compensation enabled instruction.The application is first with three phase transformations two
Three-phase voltage is converted to two-phase voltage by phase transformer 1, and acquires electrical quantity by connection electric energy acquisition unit 2, by acquisition
Electrical quantity is sent to uneven regulation unit 3 and idle regulation unit 4, imbalance regulation unit 3 be used to monitor α phase and β phase it
Between current unbalance factor, and to AC-DC-AC module 5 send current regulation instruction, AC-DC-AC module 5 is then to biphase current
It is adjusted, idle regulation unit 4 sends reactive compensation enabled instruction, AC- for monitoring power, and to AC-DC-AC module 5
DC-AC module 5 is then adjusted power in route；It is compared to the prior art, low-voltage power supply system provided by the invention, energy
Enough greatly reduce the probability of three-phase load unbalance and reduces the seriousness of line loss.In addition, the 10kV of the embodiment of the present application becomes
The low pressure single phase power supply system of 220V is using two-phase unbalance control, compared with three-phase imbalance control, it is possible to reduce mend
The capacity of device is repaid, Optimal Control Strategy has apparent economic benefit.
The electrical quantity that electric energy acquisition unit 2 acquires may include: that the active power, reactive power, electric current of α phase and β phase have
Valid value, voltage effective value, power factor, 2-15 subharmonic current.Wherein, current effective value is for calculating three-phase current imbalance
Degree, power factor is for judging whether to generate and send reactive compensation enabled instruction.
In the application preferred embodiment, imbalance regulation unit 3 receives electrical quantity, uses Iα、IβRespectively indicate three-phase-two
The current effective value of 1 two feeder lines of phase transformer, uses IeThe rated current of indication transformer calculates α phase and β using following formula
Current balance type degree between phase:If current balance type degree is greater than 30%, three-phase-is calculated using following formula
The load factor of two phase transformers 1:If the load factor of-two phase transformer 1 of three-phase is greater than 50%, electric current tune is sent
Section is instructed to AC-DC-AC module 5.
In the application preferred embodiment, if big according to the load factor that above program calculates-two phase transformer 1 of three-phase
In 50%, imbalance regulation unit 3 sends current regulation and instructs to before AC-DC-AC module 5, and imbalance regulation unit 5 utilizes
Following formula current adjustment: 0.5* | Iα-Iβ|, the current adjustment that current regulation is instructed and calculated by imbalance regulation unit 3
It transmits to AC-DC-AC module 5, AC-DC-AC module 5 then adjusts the electricity between two-phase according to the current adjustment of calculating
Stream, so that current unbalance factor meets preset condition.
In the application preferred embodiment, if any one phase power factor in α phase and β phase less than 0.8, is sent idle
Enabled instruction is compensated to AC-DC-AC module 5.
In the application preferred embodiment, please referring to Fig. 3 is that the 10kV that another embodiment of the present invention provides becomes 220V's
The structural schematic diagram of low pressure single phase power supply system, low pressure single phase power supply system further include: harmonic wave prewarning unit 6, harmonic wave early warning list
Member 6 is for receiving electrical quantity.Use IhIt indicates harmonic current, uses I1Indicate alternating current, harmonic wave prewarning unit 6 utilizes following formula
Calculate harmonic current containing ratio:For odd harmonic, if odd harmonic electric current containing ratio is greater than 10%, issue
Alarm signal；
For even-order harmonic, if even-order harmonic electric current containing ratio is greater than 2%, alarm signal is issued.
In the application preferred embodiment, if AC-DC-AC module 5 receives current regulation instruction and idle benefit simultaneously
Enabled instruction is repaid, it is preferential to execute current regulation instruction.
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to of the invention its
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the invention, these modifications, purposes or
Person's adaptive change follows general principle of the invention and including the undocumented common knowledge in the art of the present invention
Or conventional techniques.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be understood that the present invention is not limited to the precise structure already described above and shown in the accompanying drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is limited only by the attached claims.
Claims (8)
1. the low pressure single phase power supply system that a kind of 10kV becomes 220V, which is characterized in that the system comprises sequentially connected three-phases-
Two phase transformers (1), electric energy acquisition unit (2), uneven regulation unit (3), idle regulation unit (4) and AC-DC-AC mould
Block (5),
- two phase transformer of three-phase (1) is used to three-phase voltage being converted to α phase and β phase two-phase voltage, and powers to the load；
The electric energy acquisition unit (2) for acquiring electrical quantity, send the electrical quantity to uneven regulation unit (3) and
The idle regulation unit (4)；
Uneven regulation unit (3) generates current regulation instruction, hair for receiving the electrical quantity, according to the electrical quantity
The current regulation is sent to instruct to the AC-DC-AC module (5)；
The Reactive-power control unit (4) generates reactive compensation enabled instruction for receiving the electrical quantity, according to the electrical quantity,
The reactive compensation enabled instruction is sent to the AC-DC-AC module (5)；
The AC-DC-AC module (5) is for receiving and executing the current regulation instruction and the reactive compensation enabled instruction.
2. the low pressure single phase power supply system that 10kV as described in claim 1 becomes 220V, which is characterized in that the electrical quantity packet
It includes: the active power of α phase and β phase, reactive power, current effective value, voltage effective value, power factor, 2-15 subharmonic current.
3. the low pressure single phase power supply system that 10kV as claimed in claim 2 becomes 220V, which is characterized in that the uneven regulation
Unit (3) receives the electrical quantity, uses Iα、IβThe electric current for respectively indicating-two (1) two feeder line of phase transformer of three-phase is effective
Value, uses IeThe rated current of indication transformer calculates the current balance type degree between α phase and β phase using following formula:If current balance type degree is greater than 30% ,-two phase transformer of three-phase (1) is calculated using following formula
Load factor:If the load factor of-two phase transformer of three-phase (1) is greater than 50%, sends the current regulation and refer to
It enables to the AC-DC-AC module (5).
4. the low pressure single phase power supply system that 10kV as claimed in claim 3 becomes 220V, which is characterized in that utilize following formula meter
Calculate current adjustment: 0.5* | Iα-Iβ|。
5. the low pressure single phase power supply system that 10kV as claimed in claim 2 becomes 220V, which is characterized in that if in α phase and β phase
Any one phase power factor less than 0.8, send the reactive compensation enabled instruction to the AC-DC-AC module (5).
6. the low pressure single phase power supply system that 10kV as described in claim 1 becomes 220V, which is characterized in that the low voltage power supply
System further include: harmonic wave prewarning unit (6), the harmonic wave prewarning unit (6) is for receiving the electrical quantity, according to described electrical
Amount generates harmonic wave pre-warning signal.
7. the low pressure single phase power supply system that 10kV as claimed in claim 6 becomes 220V, which is characterized in that use IhIndicate harmonic wave electricity
Stream, uses I1Indicate fundamental current, the harmonic wave prewarning unit (6) calculates harmonic current containing ratio using following formula:For odd harmonic, if the odd harmonic electric current containing ratio is greater than 10%, alarm signal is issued；
For even-order harmonic, if the even-order harmonic electric current containing ratio is greater than 2%, alarm signal is issued.
8. the low pressure single phase power supply system that 10kV as described in claim 1 becomes 220V, which is characterized in that if the AC-DC-
AC module (5) receives the current regulation instruction and the reactive compensation enabled instruction simultaneously, preferentially executes the electric current tune
Section instruction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811244574.8A CN109193709B (en) | 2018-10-24 | 2018-10-24 | 10kV becomes 220V's single-phase power supply system of low pressure |
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| CN201811244574.8A CN109193709B (en) | 2018-10-24 | 2018-10-24 | 10kV becomes 220V's single-phase power supply system of low pressure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110783926A (en) * | 2019-11-12 | 2020-02-11 | 国网四川省电力公司泸州供电公司 | Power supply system for new energy electric automobile charging pile |
| CN113452027A (en) * | 2021-07-27 | 2021-09-28 | 山东鲁软数字科技有限公司智慧能源分公司 | Energy scheduling system and method for low-voltage flexible direct power distribution transformer area |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011101566A (en) * | 2009-11-09 | 2011-05-19 | Chugoku Electric Power Co Inc:The | Method for eliminating voltage imbalance of three-phase power distribution line and information processing apparatus used for this method |
| CN103683305A (en) * | 2013-12-16 | 2014-03-26 | 河海大学 | Enhanced type railway power regulation device |
| JP2015082881A (en) * | 2013-10-22 | 2015-04-27 | 東芝三菱電機産業システム株式会社 | Imbalance compensation device |
| CN104779623A (en) * | 2014-01-15 | 2015-07-15 | 河海大学 | Electric railway traction substation combined compensation system and compensation method |
| CN106159982A (en) * | 2016-07-26 | 2016-11-23 | 湖南华大紫光科技股份有限公司 | Unified energy storage and conversion control system |
| CN106787785A (en) * | 2017-01-23 | 2017-05-31 | 湖南华大紫光科技股份有限公司 | The single-phase converting means of three-phase and its compensation method are compensated based on transformer electronic formula |
| CN108631342A (en) * | 2018-06-20 | 2018-10-09 | 贵州电网有限责任公司 | A kind of the three-phase imbalance compensation device and its control method of distribution transformer |
-
2018
- 2018-10-24 CN CN201811244574.8A patent/CN109193709B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011101566A (en) * | 2009-11-09 | 2011-05-19 | Chugoku Electric Power Co Inc:The | Method for eliminating voltage imbalance of three-phase power distribution line and information processing apparatus used for this method |
| JP2015082881A (en) * | 2013-10-22 | 2015-04-27 | 東芝三菱電機産業システム株式会社 | Imbalance compensation device |
| CN103683305A (en) * | 2013-12-16 | 2014-03-26 | 河海大学 | Enhanced type railway power regulation device |
| CN104779623A (en) * | 2014-01-15 | 2015-07-15 | 河海大学 | Electric railway traction substation combined compensation system and compensation method |
| CN106159982A (en) * | 2016-07-26 | 2016-11-23 | 湖南华大紫光科技股份有限公司 | Unified energy storage and conversion control system |
| CN106787785A (en) * | 2017-01-23 | 2017-05-31 | 湖南华大紫光科技股份有限公司 | The single-phase converting means of three-phase and its compensation method are compensated based on transformer electronic formula |
| CN108631342A (en) * | 2018-06-20 | 2018-10-09 | 贵州电网有限责任公司 | A kind of the three-phase imbalance compensation device and its control method of distribution transformer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110783926A (en) * | 2019-11-12 | 2020-02-11 | 国网四川省电力公司泸州供电公司 | Power supply system for new energy electric automobile charging pile |
| CN113452027A (en) * | 2021-07-27 | 2021-09-28 | 山东鲁软数字科技有限公司智慧能源分公司 | Energy scheduling system and method for low-voltage flexible direct power distribution transformer area |
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