CN106253280A - A kind of modularity low-voltage active harmonic treatment system of electrical network in parallel - Google Patents
A kind of modularity low-voltage active harmonic treatment system of electrical network in parallel Download PDFInfo
- Publication number
- CN106253280A CN106253280A CN201610758210.6A CN201610758210A CN106253280A CN 106253280 A CN106253280 A CN 106253280A CN 201610758210 A CN201610758210 A CN 201610758210A CN 106253280 A CN106253280 A CN 106253280A
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- China
- Prior art keywords
- electrical network
- harmonic
- parallel
- treatment system
- machine interface
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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
- H02J3/01—Arrangements for reducing harmonics or ripples
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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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- 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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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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
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The present invention relates to the modularity low-voltage active harmonic treatment system of a kind of electrical network in parallel, belongs to electrical equipment technical field.This system includes: current transformer, several power compensating circuits and the man machine interface being arranged on electrical network；Power compensating circuit includes load current harmonic detecting module, main power control module and the main power circuit module of series connection；Load current harmonic detecting module in one of them power compensating circuit connects current transformer, and main power control module connects electrical network；Main power control module and load current harmonic detecting module connect man machine interface by optical fiber.The modularity low-voltage active harmonic treatment system of the electrical network in parallel that the present invention provides, can be tracked the harmonic wave that frequency and amplitude all change compensating, and compensation characteristic is not affected by electric network impedance, both can be to a harmonic wave and reactive source separate compensation, it is possible to multiple harmonic waves and reactive source centralized compensation.
Description
Technical field
The present invention relates to the modularity low-voltage active harmonic treatment system of a kind of electrical network in parallel, belong to power equipment technology neck
Territory.
Background technology
Along with develop rapidly and a large amount of of high frequency switch power of power electronic device, microelectric technique use, harmonic wave is asked
Topic more causes the extensive attention of countries in the world.The electromotor of modern power systems, will not under normal steady state service condition
Produce how many harmonic wave electromotive force.The device of power system generation harmonic wave is mainly some transmissions of electricity with nonlinear wind vibration and sets
Standby and electrical equipment, causes the harmonic source of harmonic wave mainly to have: the non-linear exciter of (1) power transformer；(2) electric rotating machine causes
Harmonic wave；(3) wave distortion that electric arc furnace causes；(4) working power (particularly high frequency switch power) of various electric equipments
The harmonic wave produced.
Along with the increasing of power electronic equipment and the continuous increase of capacity, the harmonic wave proportion that above-mentioned (4) part produces
Increasing, the most become main harmonic pollution source.The voltage that preferably utility network is provided should be that frequency is fixed
And voltage magnitude is within the limits prescribed.But a large amount of uses due to nonlinear load not only make load in actual electric network
Electric current non-sine, makes load terminal voltage distortion so that produce harmonic voltage in electrical network simultaneously.Harmonic wave is to power system
Polluting harm system itself and vast power consumer of electromagnetic environment.
Harmonic wave substantially has the following aspects to the harm of public electric wire net and other system: (1) harmonic wave makes grid loss increase
Add；(2) harmonic wave makes utilization rate of electrical decline；(3) harmonic wave makes the reliability decrease of electrical network；(4) harmonic wave is to electric on interference electrical network
Equipment；(5) harmonic wave is to interference calculation machine communication system and automatic controlling device.
It is traditional suppression harmonic wave by the LC passive filter that power capacitor, reactor and resistor are appropriately combined
With the Main Means of compensating reactive power, passive filter simple in construction, cost of investment are low, technology maturation, reliable and maintenance side
Just, it is the relatively broad harmonics restraint used at present and reactive-load compensation means;But owing to passive filter is by system
In for harmonic wave provide a low impedance path in parallel, to play filter action, its filtering characteristic is the resistance by system and wave filter
Anti-ratio is determined, thus there is following defect:
L () resonant frequency depends on component parameters, therefore can only be filtered major harmonic, it is impossible to harmonic wave and reactive power
Carrying out dynamic compensation, the drift of LC parameter will cause filtering characteristic to change, and make filtering performance unstable, and filtering requirements and nothing
Merit compensates, pressure regulation requires sometimes to be difficult to coordinate；
(2) filtering characteristic depends on electrical network parameter, and the impedance of electrical network and harmonic frequency along with power system operating condition with
Time change, thus the design of LC network is more difficult；
(3) several subharmonic of specific time can only be eliminated, and the parameter of electrical network and LC may produce parallel resonance and make this subharmonic divide
Amount is amplified, and makes grid supply quality decline；
(4) when harmonic current increases, wave filter burden increases the weight of therewith, is likely to result in wave filter overload.
Owing to passive filter exists the above shortcoming himself being difficult to and overcoming, therefore it is used alone passive filter and presses down
Harmonic wave processed and compensating reactive power have been difficult to meet modern electric and have produced and the needs of life.
Summary of the invention
The invention solves the problems that and technical problem is that: the shortcoming overcoming above-mentioned technology.The module of a kind of active parallel electrical network is provided
Change low-voltage active harmonic treatment system.
In order to solve above-mentioned technical problem, the technical scheme that the present invention proposes is: the modularity low pressure of a kind of electrical network in parallel
Active harmonic control system, including: current transformer, several power compensating circuits and the man machine interface being arranged on electrical network；
Described power compensating circuit includes load current harmonic detecting module, main power control module and the main power circuit mould of series connection
Block；Described load current harmonic detecting module in one of them described power compensating circuit connects described current transformer, institute
State main power control module and connect electrical network；Described main power control module and load current harmonic detecting module pass through optical fiber
Connect described man machine interface.
Such scheme is further improved by: described man machine interface has LCD display and operable interface.
Such scheme is further improved by: described man machine interface has data-interface, and connects meter by this interface
Calculation machine.
Such scheme is further improved by: described man machine interface connects computer by optical fiber.
The modularity low-voltage active harmonic treatment system of the electrical network in parallel that the present invention provides, all can change frequency and amplitude
Harmonic wave be tracked compensating, and compensation characteristic do not affected by electric network impedance, both can be independent to a harmonic wave and reactive source
Compensate, it is possible to multiple harmonic waves and reactive source centralized compensation.Use LCD Chinese and English show and operate interface, can enter with computer
Row communication, installs background monitoring software at terminal, can realize the remotely operation to active filter and control；Can be real
Existing logout inquiry, supports logout parameter setting function simultaneously；Data transmission is all optical signal, will not be done by electromagnetism
Disturb；The wide ranges that can compensate for, can compensate and be arbitrarily designated subharmonic；Dynamic response fast (response of ms level), accurate, capacitive and sense
Property two-way treatment；Own power attenuation low (less than equipment rated power 3%)；Modularized design, compensation capacity of can freely arranging in pairs or groups.
Accompanying drawing explanation
The invention will be further described below in conjunction with the accompanying drawings.
Fig. 1 is a preferred embodiment electrical block diagram of the embodiment of the present invention.
Detailed description of the invention
Embodiment
The modularity low-voltage active harmonic treatment system of the electrical network in parallel of the present embodiment, as it is shown in figure 1, include: be arranged on
Current Transmit, several power compensating circuits and man machine interface on electrical network.
Power compensating circuit includes load current harmonic detecting module, main power control module and the main power circuit of series connection
Module；Load current harmonic detecting module in one of them power compensating circuit connects Current Transmit, and main power controls
Module connects electrical network；Main power control module and load current harmonic detecting module connect man machine interface by optical fiber；Man-machine boundary
Mask has number to connect computer by optical fiber, and computer is loaded with monitoring unit；Man machine interface has LCD display and operable
Interface.
As shown in FIG., the present embodiment uses 8 road power compensating circuits；It practice, the modularity that the present embodiment uses sets
Meter, can allocate power compensating circuit quantity according to capacity.Harmonic filtration: active power filtering eliminates the humorous of nonlinear load generation in real time
Ripple electric current, or eliminate the harmonic current of grid side, reduce system voltage, current distortion rate, brought up to by electricity average power factor
More than 0.95.
The present embodiment has a characteristic that
Stabilisation systems, is having at larger fluctuation and impact load, can reduce voltage pulsation and suppression voltage flicker, improve electricity
Pressure stability, improves quality of voltage.
Energy-saving and cost-reducing, reduce line loss and the transformer loss of power distribution network.Improve the load efficiency of distribution transformer, complete machine
Efficiency can reach more than 97%, year saves energy reach 6,500kwh；
In the extension device life-span, improve equipment heating, extension device service life.
Use LCD Chinese and English show and operate interface, communication can be carried out with computer, at terminal, backstage prison is installed
Control module, can realize the remotely operation to active filter and control；Logout inquiry can be realized, support event note simultaneously
Record parameter setting function；Data transmission is all optical signal, will not be by electromagnetic interference；The wide ranges that can compensate for, can compensate
It is arbitrarily designated subharmonic；Dynamic response fast (response of ms level), accurate, capacitive and perception two-way treatment；Power attenuation own is low (little
In equipment rated power 3%)；Modularized design, compensation capacity of can freely arranging in pairs or groups.
The present invention is not limited to the concrete technical scheme described in above-described embodiment, and in addition to the implementation, the present invention also may be used
There to be other embodiments.The technical scheme that all employing equivalents are formed, is the protection domain of application claims.
Claims (4)
1. the modularity low-voltage active harmonic treatment system of an electrical network in parallel, it is characterised in that including: be arranged on electrical network
Current transformer, several power compensating circuits and man machine interface；Described power compensating circuit includes that the load current of series connection is humorous
Ripple detection module, main power control module and main power circuit module；Described negative in one of them described power compensating circuit
Carrying current harmonics detection module and connect described current transformer, described main power control module connects electrical network；Described main merit
Rate control module and load current harmonic detecting module connect described man machine interface by optical fiber.
The modularity low-voltage active harmonic treatment system of electrical network in parallel the most according to claim 1, it is characterised in that: described
Man machine interface has LCD display and operable interface.
The modularity low-voltage active harmonic treatment system of electrical network in parallel the most according to claim 1, it is characterised in that: described
Man machine interface has data-interface, and connects computer by this interface.
The modularity low-voltage active harmonic treatment system of electrical network in parallel the most according to claim 3, it is characterised in that: described
Man machine interface connects computer by optical fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610758210.6A CN106253280A (en) | 2016-08-30 | 2016-08-30 | A kind of modularity low-voltage active harmonic treatment system of electrical network in parallel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610758210.6A CN106253280A (en) | 2016-08-30 | 2016-08-30 | A kind of modularity low-voltage active harmonic treatment system of electrical network in parallel |
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| Publication Number | Publication Date |
|---|---|
| CN106253280A true CN106253280A (en) | 2016-12-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610758210.6A Pending CN106253280A (en) | 2016-08-30 | 2016-08-30 | A kind of modularity low-voltage active harmonic treatment system of electrical network in parallel |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204720987U (en) * | 2015-07-09 | 2015-10-21 | 广西星宇智能电气有限公司 | A kind of Active Power Filter-APF |
| CN205123258U (en) * | 2015-11-13 | 2016-03-30 | 四川英杰电气股份有限公司 | Active electric power filter |
| CN105656043A (en) * | 2014-12-02 | 2016-06-08 | 湖北中科电气股份有限公司 | Drawer type modularized active power filtering apparatus |
| CN206117157U (en) * | 2016-08-30 | 2017-04-19 | 江苏华强电力设备有限公司 | Active harmonic treatment system of modularization low pressure of parallelly connected electric wire netting |
-
2016
- 2016-08-30 CN CN201610758210.6A patent/CN106253280A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105656043A (en) * | 2014-12-02 | 2016-06-08 | 湖北中科电气股份有限公司 | Drawer type modularized active power filtering apparatus |
| CN204720987U (en) * | 2015-07-09 | 2015-10-21 | 广西星宇智能电气有限公司 | A kind of Active Power Filter-APF |
| CN205123258U (en) * | 2015-11-13 | 2016-03-30 | 四川英杰电气股份有限公司 | Active electric power filter |
| CN206117157U (en) * | 2016-08-30 | 2017-04-19 | 江苏华强电力设备有限公司 | Active harmonic treatment system of modularization low pressure of parallelly connected electric wire netting |
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Application publication date: 20161221 |
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