CN106849122A - A kind of energy-saving control device and power-economizing method administered based on three-phase imbalance - Google Patents
A kind of energy-saving control device and power-economizing method administered based on three-phase imbalance Download PDFInfo
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- CN106849122A CN106849122A CN201710131064.9A CN201710131064A CN106849122A CN 106849122 A CN106849122 A CN 106849122A CN 201710131064 A CN201710131064 A CN 201710131064A CN 106849122 A CN106849122 A CN 106849122A
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- 238000004134 energy conservation Methods 0.000 claims description 4
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- 230000001276 controlling effect Effects 0.000 description 3
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Classifications
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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
- H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
-
- 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
- H02J3/01—Arrangements for reducing harmonics or ripples
-
- 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
-
- 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
- Y02E40/10—Flexible AC transmission systems [FACTS]
-
- 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
- Y02E40/40—Arrangements for reducing harmonics
-
- 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
Abstract
A kind of energy-saving control device administered based on three-phase imbalance that the present invention is provided, at least two Data Detection terminals are communicated with monitor terminal, Data Detection terminal includes control module, current collector, voltage collector, data conditioning module, Active Power Filter-APF, controllable SVG modules, current transformer, inverter, reactive compensation module and data transmission module；The program efficiently solves the reactive loss problem that power distribution network is caused due to reactive-load compensation deficiency, and can realize smooth compensating, and compensation efficiency is high, and compensation precision is high, and grid loss is reduced to the full extent；The program is effectively avoided compensation device and is crossed benefit, owes the problems such as mending by Automated condtrol, extends the service life of compensation device；The program integrates compensation device with the power quality controlling device of power network, can effectively administer harmonic wave present in power network, three-phase imbalance problem.
Description
Technical field
The present invention relates to field of distribution network, more particularly to a kind of energy-saving control device and section administered based on three-phase imbalance
Can method.
Background technology
Power network is the significant transportation passage of electric energy, and power network itself saving energy and decreasing loss is the important composition portion of China's energy conservation
Point.Current power distribution network weakness is to need one of problem of urgent solution in China's electric network composition.Because distribution site many areas are wide,
Line construction is complicated, and loss ratio is larger, accounts for more than the 50% of grid loss, and its energy saving space is obvious.From rural power grids in 1998
Built and since improvement project is implemented, though China rural power grids health status be improved significantly, it is fast with rural economy
Speed development, power supply capacity and power supply quality to rural power grids propose requirements at the higher level.
Power distribution network energy consumption is concentrated mainly on transmission line of electricity and user's request side, in below 10KV distribution networks, especially exists
In the distribution network of 400V grades, because substantial amounts of industrial or agricultural equipment is accessed extensively, various electric energy contaminated equipments are widely used,
Substantial amounts of energy loss all is brought to power network, town and country power distribution network is the main part of power system energy loss.On the other hand,
With the development and the change of load structure of modern power network, power quality problem has caused the great attention for electricity consumption both sides.
The effect that reactive power compensation device is undertaken in electric power system is the power factor for improving power network, reduces power supply
The loss of transformer and conveying circuit, improves power supplying efficiency, improves power supply environment.So reactive power compensation device is supplied in electric power
An indispensable position is in electric system.Rational selection compensation device, can accomplish to reduce network to greatest extent
Loss, effectively improve the power network quality of power supply.
The domestic research energy-saving for power distribution network at present, the especially energy-saving research of distribute-electricity transformer district, still
Offline line loss calculation, Reactive power control independent, to certain regional power grid are rested on, and does not account for three-phase imbalance
Administer.And in current power distribution network the energy-saving equipment such as existing reactive-load compensation and power quality controlling device be single-point distribution, that
This independence, causes the aspects such as running status, fault message, energy-saving effect and the power quality controlling effect of equipment to supervise in real time
Control.
The content of the invention
A kind of energy-saving control device administered based on three-phase imbalance that the present invention is provided, it is intended to overcome and match somebody with somebody in the prior art
The deficiency of power network energy-saving effect difference.
In order to solve the above-mentioned technical problem, the present invention is adopted the following technical scheme that：It is a kind of based on three-phase imbalance administer
Energy-saving control device, including monitor terminal and at least two Data Detection terminals with monitor terminal communication, the Data Detection
Terminal includes control module, current collector, voltage collector, data conditioning module, Active Power Filter-APF, controllable SVG moulds
Block, current transformer, inverter, reactive compensation module and data transmission module, the data conditioning module, Active Power Filter-APF,
Controllable SVG modules, current transformer, inverter, reactive compensation module and data transmission module are communicated with control module, the electric current
Collector, voltage collector are communicated by data conditioning module and control module, the monitor terminal include main control module with
Data transmit-receive module, low and medium voltage distribution network AVC, harmonic wave positioning analysis and control module, the distribution for being communicated with main control module respectively
Energy-saving index evaluation module, quality of power supply coordinating control module and temporary drop perturbation analysis module；The controllable SVG modules include inspection
Device, control arithmetic unit and compensation follower are surveyed, the detector, control arithmetic unit and compensation follower are in parallel by reactor
On power distribution network.
A kind of optional scheme, the current transformer is the electric semiconductor bridge-type current transformer from commutation.Reduce energy-conservation control
The use cost of device processed, optimizes the performance of energy-saving control device.
A kind of optional scheme, the inverter is voltage source inverter.Inverter has good performance, excellent
The performance of energy-saving control device is changed.
A kind of optional scheme, the detector, control arithmetic unit and compensation follower be IGBT compositions from commutation
Bridge circuit.Optimize the performance of energy-saving control device.
A kind of power-economizing method of the energy-saving control device administered based on three-phase imbalance, is comprised the following steps；
Step a, loss, the power-balance parameter of the electric net platform region of investigation, and investigate the existing Energy Saving Control side in electric net platform region
Method；
Step b, the topological structure of the electric net platform region of investigation and the control method of electric net platform region；
Step c, the survey information according to step a and step b manufactures experimently the model machine of energy-saving control device, and is simulated examination
Test, then, according to the circuit structure and circuit interface of electric net platform region, select the hardware interface of energy-saving control device；
Step d, is made the industrial machine of energy-saving control device and is accessed power network；
Step e, is automatically controlled using computer to electric net platform region and energy-saving control device.
Compared with prior art, a kind of energy-saving control device administered based on three-phase imbalance that the present invention is provided, is had
Following advantage：At least two Data Detection terminals are communicated with monitor terminal, and Data Detection terminal includes control module, current acquisition
Device, voltage collector, data conditioning module, Active Power Filter-APF, controllable SVG modules, current transformer, inverter, reactive-load compensation
Module and data transmission module；The reactive loss that the program efficiently solves power distribution network and caused because reactive-load compensation is not enough is asked
Topic, and smooth compensating can be realized, compensation efficiency is high, and compensation precision is high, and grid loss is reduced to the full extent；The program
By Automated condtrol, effectively avoid compensation device and cross benefit, owe the problems such as mending, extend the service life of compensation device；
The program integrates compensation device with the power quality controlling device of power network, can effectively administer present in power network
Harmonic wave, three-phase imbalance problem；The program substantially increases the intellectuality of power network using automatic compensation, the automatic method administered
Level, reduces the labour intensity of technical staff, also, improves power supply reliability and power supply quality, reduces operation of power networks
Maintenance cost.
Compared with prior art, the energy-conservation of a kind of energy-saving control device administered based on three-phase imbalance that the present invention is provided
Method, is had the following advantages that, the industrial machine of energy-saving control device is first verified before power network is accessed, to ensure industrial machine
Unfailing performance, and then stabilization when improve operation of power networks leans on performance.The operation of power network, also, Energy Saving Control is conducive to fill
Put with good energy-saving effect.
Brief description of the drawings
Accompanying drawing 1 is a kind of structured flowchart of the energy-saving control device administered based on three-phase imbalance of the present invention；
Accompanying drawing 2 is the structure of Data Detection terminal in a kind of energy-saving control device administered based on three-phase imbalance of the present invention
Block diagram；
Accompanying drawing 3 is the structural frames of monitor terminal in a kind of energy-saving control device administered based on three-phase imbalance of the present invention
Figure.
Specific embodiment
Below in conjunction with the accompanying drawings, to a kind of energy-saving control device work administered based on three-phase imbalance of the invention furtherly
It is bright.Following examples are only used for helping skilled in the art to understand the present invention, are not limitations of the present invention.
As shown in figure 1, it is a kind of based on three-phase imbalance administer energy-saving control device, including monitor terminal 1 and with monitoring
At least two Data Detection terminals 2 of the communication of terminal 1, monitor terminal 1 is communicated with Data Detection terminal 2 by communication cable；
As shown in Fig. 2 the Data Detection terminal 2 includes control module 3, current collector 4, voltage collector 5, data
Conditioning module 6, Active Power Filter-APF 7, controllable SVG modules 8, current transformer 9, inverter 10, reactive compensation module 11 and data
Transport module 12, the data conditioning module 6, Active Power Filter-APF 7, controllable SVG modules 8, current transformer 9, inverter 10, nothing
Work(compensating module 11 and data transmission module 12 are communicated with control module 3, and the current collector 4, voltage collector 5 lead to
Cross data conditioning module 6 to be communicated with control module 3, the current transformer 9 is the electric semiconductor bridge-type current transformer from commutation, described
Inverter 10 is voltage source inverter；
As shown in figure 3, the monitor terminal 1 includes main control module 13 and the data transmit-receive for being communicated with main control module 13 respectively
Module 14, low and medium voltage distribution network AVC15, harmonic wave positioning analysis and control module 16, distribution energy-saving index evaluation module 17, electric energy
Quality coordination control module 18 and temporarily drop perturbation analysis module 19；
The controllable SVG modules 8 include detector, control arithmetic unit and compensation follower, the detector, control computing
Device and compensation follower are connected in parallel on power distribution network by reactor, and the detector, control arithmetic unit and compensation follower are equal
It is IGBT compositions from commutation bridge circuit.
More than each part composition energy-saving control device, in actual use, energy-saving control device have automatic compensation,
The automatic effect administered, stabilization is compensated relative to prior art reactive compensation module 11, improves stability during operation of power networks
Energy.Also, the program has good energy-saving effect, the loss during operation of power networks is reduced.
A kind of power-economizing method of the energy-saving control device administered based on three-phase imbalance, is comprised the following steps；
Step a, loss, the power-balance parameter of the electric net platform region of investigation, and investigate the existing Energy Saving Control side in electric net platform region
Method, to understand the existing data message in electric net platform region；
Step b, the topological structure of the electric net platform region of investigation and the control method of electric net platform region, to understand existing electric net platform region
Structure；
Step c, the survey information according to step a and step b manufactures experimently the model machine of energy-saving control device, and is simulated examination
Test, preliminary model machine is made according to the data that step a, step b understand, and the model machine is verified using simulation means, with
The performance of model machine is verified, should be redesigned for undesirable model machine, and simulation means are re-used after the completion of design
Verified, after model machine checking, according to the circuit structure and circuit interface of electric net platform region, select the hardware of energy-saving control device to connect
Mouthful；
Step d, is made the industrial machine of energy-saving control device and is accessed power network, realizes the industry of energy-saving control device
Come into operation with machine；
Step e, is automatically controlled using computer to electric net platform region and energy-saving control device.Using computer controls system
System is controlled to electric net platform region and energy-saving control device, realizes grid automation.
Section Example of the invention is described in detail above in association with accompanying drawing.Those skilled in the art read this theory
After bright book, based on technical scheme, above-described embodiment can be modified, these modifications still fall within guarantor of the invention
Shield scope.
Claims (5)
1. it is a kind of based on three-phase imbalance administer energy-saving control device, it is characterised in that：Including monitor terminal (1) and with monitoring
At least two Data Detection terminals (2) of terminal (1) communication, the Data Detection terminal (2) includes control module (3), electric current
Collector (4), voltage collector (5), data conditioning module (6), Active Power Filter-APF (7), controllable SVG modules (8), unsteady flow
Device (9), inverter (10), reactive compensation module (11) and data transmission module (12), it is the data conditioning module (6), active
Electric-power filter (7), controllable SVG modules (8), current transformer (9), inverter (10), reactive compensation module (11) and data transfer
Module (12) is communicated with control module (3), and the current collector (4), voltage collector (5) pass through data conditioning module
(6) communicated with control module (3), the monitor terminal (1) communicates including main control module (13) and respectively with main control module (13)
Data transmit-receive module (14), low and medium voltage distribution network AVC (15), harmonic wave positioning analysis and control module (16), distribution energy-conservation refer to
Mark evaluation module (17), quality of power supply coordinating control module (18) and temporary drop perturbation analysis module (19)；The controllable SVG modules
(8) including detector, control arithmetic unit and compensation follower, the detector, control arithmetic unit and compensation follower pass through
Reactor is connected in parallel on power distribution network.
2. it is according to claim 1 it is a kind of based on three-phase imbalance administer energy-saving control device, it is characterised in that：It is described
Current transformer (9) is the electric semiconductor bridge-type current transformer from commutation.
3. it is according to claim 1 it is a kind of based on three-phase imbalance administer energy-saving control device, it is characterised in that：It is described
Inverter (10) is voltage source inverter.
4. it is according to claim 1 it is a kind of based on three-phase imbalance administer energy-saving control device, it is characterised in that：It is described
Detector, control arithmetic unit and compensation follower be IGBT compositions from commutation bridge circuit.
5. a kind of a kind of power-economizing method of the energy-saving control device administered based on three-phase imbalance as claimed in claim 1, its
It is characterised by：Comprise the following steps；
Step a, loss, the power-balance parameter of the electric net platform region of investigation, and investigate the existing energy-saving control method in electric net platform region；
Step b, the topological structure of the electric net platform region of investigation and the control method of electric net platform region；
Step c, the survey information according to step a and step b manufactures experimently the model machine of energy-saving control device, and carries out simulated test, so
Afterwards, according to the circuit structure and circuit interface of electric net platform region, the hardware interface of energy-saving control device is selected；
Step d, is made the industrial machine of energy-saving control device and is accessed power network；
Step e, is automatically controlled using computer to electric net platform region and energy-saving control device.
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| CN201710131064.9A CN106849122A (en) | 2017-03-07 | 2017-03-07 | A kind of energy-saving control device and power-economizing method administered based on three-phase imbalance |
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| CN201710131064.9A CN106849122A (en) | 2017-03-07 | 2017-03-07 | A kind of energy-saving control device and power-economizing method administered based on three-phase imbalance |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107437801A (en) * | 2017-06-20 | 2017-12-05 | 贵州电网有限责任公司 | Power distribution network Energy Saving Control optimization method and device |
| CN108448601A (en) * | 2018-05-05 | 2018-08-24 | 石家庄科林电气股份有限公司 | The grid-connected strategy of single-phase inverter and its commutation with commutation device |
| CN113489147A (en) * | 2021-06-29 | 2021-10-08 | 海南电网有限责任公司 | Harmonic monitoring system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026096A (en) * | 2016-06-29 | 2016-10-12 | 南京软核科技有限公司 | SVG-based multi-level coordination energy-saving optimization control system for distribution network |
| CN206524631U (en) * | 2017-03-07 | 2017-09-26 | 国网浙江省电力公司金华供电公司 | A kind of energy-saving control device administered based on three-phase imbalance |
-
2017
- 2017-03-07 CN CN201710131064.9A patent/CN106849122A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026096A (en) * | 2016-06-29 | 2016-10-12 | 南京软核科技有限公司 | SVG-based multi-level coordination energy-saving optimization control system for distribution network |
| CN206524631U (en) * | 2017-03-07 | 2017-09-26 | 国网浙江省电力公司金华供电公司 | A kind of energy-saving control device administered based on three-phase imbalance |
Non-Patent Citations (2)
| Title |
|---|
| 崔德民;刘建;李晓博;: "对配电网单相接地故障的技术研究" * |
| 张铁军;陈雪;陈广赞;林丽;: "城轨供电系统新型再生制动能量回馈系统" * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107437801A (en) * | 2017-06-20 | 2017-12-05 | 贵州电网有限责任公司 | Power distribution network Energy Saving Control optimization method and device |
| CN108448601A (en) * | 2018-05-05 | 2018-08-24 | 石家庄科林电气股份有限公司 | The grid-connected strategy of single-phase inverter and its commutation with commutation device |
| CN113489147A (en) * | 2021-06-29 | 2021-10-08 | 海南电网有限责任公司 | Harmonic monitoring system |
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Application publication date: 20170613 |