CN209072082U - A kind of power distribution network transformer electric energy quality compensating device - Google Patents
A kind of power distribution network transformer electric energy quality compensating device Download PDFInfo
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- CN209072082U CN209072082U CN201821998566.8U CN201821998566U CN209072082U CN 209072082 U CN209072082 U CN 209072082U CN 201821998566 U CN201821998566 U CN 201821998566U CN 209072082 U CN209072082 U CN 209072082U
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- 230000015572 biosynthetic process Effects 0.000 description 11
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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
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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
- Y02E40/40—Arrangements for reducing harmonics
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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 utility model discloses a kind of power distribution network transformer electric energy quality compensating devices, the utility model is by installing full power convertor (VSC) and isolation series transformer, dynamic regulation output voltage and unbalance voltage, the out-of-balance current of load, harmonic current and realization reactive power compensation in distribution transformer high-pressure side or low-pressure side.
Description
Technical field
The utility model relates to field of distribution network, and in particular to a kind of power distribution network transformer electric energy quality compensating device.
Background technique
There are a variety of power quality problems for industrial power distribution network transformer.User terminal uses single phase power supply, can cause three phase transformations
The voltage and current of depressor is uneven, due to the imbalance of voltage and current, can cause transformer loss increase and reduced lifetime.
Industrial application three-phase electricity power supply occasion will affect under serious situation if Voltage unbalance also will have a direct impact on power supply quality
The operation of equipment.The equipment such as the user side of the transformer of power distribution network, motor and dragging can generate harmonic wave and idle, and harmonic wave leads to electricity
Pressure distortion and current distortion cause loss to increase and influence equipment operation, and idle that loss is caused to increase, power factor is lower.
Traditional power quality controlling equipment usually individually solves specific power quality problem, such as solves the problems, such as reactive compensation
(SVG) or individually it solves the problems, such as harmonic problem (APF) or solves three-phase current unbalance (SPC), these power quality controllings
A large amount of overlapping investment is generally required, lacks a kind of synthesis and the economic equipment for solving power quality, as power distribution network is to electric energy
The requirement of quality is higher and higher, and the effect of the comprehensive and economic equipment for solving power quality is particularly important.
Utility model content
To solve the above problems, the utility model provides a kind of power distribution network transformer electric energy quality compensating device, the device
It is installed in distribution transformer high-pressure side or low-pressure side, including full power convertor (VSC) and isolation series transformer, controller,
For series and parallel structure.
Preferably, the full power convertor include: be arranged in isolation series transformer primary side series transformer and
The parallel connection converter of load-side is set, and series transformer and parallel connection converter are linked together by DC bus, total power
Current transformer uses common two level topological structure or more level topological structures.
Preferably, the series connection and parallel connection converter are converted using the ACDC three phase full bridge of to and fro flow of power
Device, the power module, DC capacitor of full-controlled devices composition, output LCL filter such as including IGBT, MOSFET.
Preferably, the secondary side of the isolation series transformer is series between distribution transformer output and load,
Series transformer is connected to isolation series transformer primary side, and parallel connection converter is in parallel with load-side.
Preferably, the controller of the compensation device includes series transformer controller and parallel connection converter controller, on
It states two controllers and control and status information is interacted by communication mode, realize system control；The grid side series connection becomes
Parallel operation and load-side parallel connection converter all use vector controlled, and series side converter is used for dynamic regulation output voltage and imbalance
Voltage, harmonic voltage compensation, side converter in parallel is for the out-of-balance current of load, harmonic current and realizes that reactive power is mended
It repays, these control strategies are realized by respective controller module, and control module includes, for detecting grid side electricity
Press PLL phaselocked loop, PI controller, the coordinate transformation module, comparator of phase.
Preferably, the series transformer controller include power grid three-phase voltage sampling, load-side three-phase voltage sampling,
The sampling of series transformer three-phase current, DC voltage sampling, output PWM control, condition monitoring, CPU element.
Preferably, the parallel connection converter controller includes that load-side three-phase voltage samples, load-side three-phase current is adopted
Sample, the sampling of parallel connection converter three-phase current, DC voltage sampling, output PWM control, condition monitoring, CPU element.
The utility model has the advantages that
The utility model provides a kind of solution power distribution network transformer power quality harnessed synthetically scheme, passes through power grid transformation
Device series transformer solves the problems, such as Voltage unbalance and reactive compensation, and it is harmonious to solve current imbalance by load parallel connection converter
Wave problem, can to distribution voltage and current imbalance, harmonic wave control, reactive compensation comprehensive compensation, reduce power quality controlling
Input cost.
Detailed description of the invention
Fig. 1 shows a kind of concrete structure diagram of power distribution network transformer synthesis compensation device of the utility model.
Fig. 2 shows a kind of two level full power convertors of power distribution network transformer synthesis compensation device of the utility model
VSC topological diagram.
Fig. 3 shows a kind of more level full power convertors of power distribution network transformer synthesis compensation device of the utility model
VSC topological diagram.
Fig. 4 shows a kind of series side controller architecture of power distribution network transformer synthesis compensation device of the utility model
Figure.
Fig. 5 shows a kind of side controller structure in parallel of power distribution network transformer synthesis compensation device of the utility model
Figure.
Specific embodiment
Fig. 1 shows a kind of concrete structure diagram of power distribution network transformer synthesis compensation device, which includes isolation series connection
Transformer and full power convertor (VSC).
Series connection side structure is that isolation series transformer pair side is connected between power grid and load, and series transformer primary side is isolated
Connect full power convertor (VSC) series transformer.Side structure in parallel is that full power convertor (VSC) parallel connection converter is connected in parallel on
Load-side.For solving the problems, such as Voltage unbalance and voltage fluctuation, load-side parallel connection becomes power distribution network transformer side series transformer
Parallel operation is for solving current imbalance, reactive compensation and harmonic wave governing problem.
Fig. 2 shows a kind of two level full power convertors of power distribution network transformer synthesis compensation device of the utility model
VSC topological diagram；The converter of connection load-side is known as parallel connection converter, is mainly used to control the stabilization of VSC DC voltage, electric current
Three-phase imbalance and harmonic current compensation.The converter of connection isolation series transformer primary side is known as series transformer, mainly
For come the supply voltage that controls load, voltage three-phase imbalance and reactive compensation.It is converted due to using AC/DC/AC, so that
Grid side and load-side are completely isolated, can control load voltage on arbitrary set point by voltage close loop control.Phase
It is that structure is simple than Multilevel Inverters VSC topological structure advantage, cost is relatively low.
Fig. 3 shows a kind of more level full power convertors of power distribution network transformer synthesis compensation device of the utility model
VSC topological diagram；Its function is identical as two level full power convertor VSC topologys.Advantage is that opening for current transformer VSC can be improved
Frequency is closed, equipment volume can be reduced and better harmonic compensation effect is provided.
Fig. 4 shows a kind of series side controller architecture of power distribution network transformer synthesis compensation device of the utility model
Figure, including the sampling of power grid three-phase voltage, load-side three-phase voltage sample, series transformer three-phase current samples, DC voltage is adopted
Sample, output PWM control, condition monitoring, CPU element etc..
The sampling of power grid three-phase voltage tracks power grid real-time lock phase angle, power grid three-phase voltage, load-side three for PLL phaselocked loop
Phase voltage sampling is used for the real-time calculating of offset voltage；The sampling of series transformer three-phase current, is used to form control inner ring, improves
Offset voltage response speed；DC voltage sampling is calculated for PWM modulation；Operation, which is formed, is used for driving power electronic power components
PWM modulation waveform；Digital output DO and digital quantity of the condition monitoring for real-time monitoring equipment input DI, realize equipment
Auto state monitoring operation；Above-mentioned all calculating control all carries out operation and control by CPU element, and CPU can be used can be high
DSP, ARM or other types MCU of fast operation.
Fig. 5 shows a kind of side controller structure in parallel of power distribution network transformer synthesis compensation device of the utility model
Figure, including the sampling of load-side three-phase voltage, the sampling of load-side three-phase current, the sampling of parallel connection converter three-phase current, DC voltage
Sampling, output PWM control, condition monitoring, CPU element etc..
It loads three-phase voltage sampling and tracks power grid real-time lock phase angle for PLL phaselocked loop；DC voltage sampling, load-side three
Phase voltage sampling, the sampling of parallel connection converter three-phase current are since side converter in parallel is grid-connected and stable DC controls, DC control
Guarantee DC control precision as outer loop control, electric current improves DC response speed as inner loop control；Load-side three-phase current
Sampling is used for the calculating of harmonic current and reactive-current compensation specified rate；Operation is formed for driving power electronic power components
PWM modulation waveform；Digital output DO and digital quantity of the condition monitoring for real-time monitoring equipment input DI, realize equipment oneself
Dynamic condition monitoring operation；Above-mentioned all calculating control all carries out operation and control by CPU element, and CPU can be used can high speed
DSP, ARM or other types MCU of operation.
It, cannot the above content is specific preferred embodiment further detailed description of the utility model is combined
Assert that the specific implementation of the utility model is only limited to these instructions, device is especially connected on distribution transformer high-pressure side
Mode is substantially consistent with utility model.For the utility model person of an ordinary skill in the technical field,
Under the premise of not departing from the utility model design, several equivalent substitute or obvious modifications are made, and performance or use is identical, all
It shall be regarded as belonging to the protection scope of the utility model.
Claims (6)
1. a kind of power distribution network transformer electric energy quality compensating device, which installs in distribution transformer high-pressure side or low-pressure side,
It is series and parallel structure including full power convertor (VSC) and isolation series transformer, controller；
It is characterized in that, the controller of the compensation device includes series transformer controller and parallel connection converter controller, on
It states two controllers and control and status information is interacted by communication mode, realize system control；The total power unsteady flow
Device includes: the series transformer that isolation series transformer primary side is arranged in and the parallel connection converter that load-side is arranged in, and series connection becomes
Parallel operation and parallel connection converter are linked together by DC bus；The series transformer and parallel connection converter all use vector control
System, series side converter are used for for dynamic regulation output voltage and unbalance voltage, harmonic voltage compensation, side converter in parallel
Out-of-balance current, harmonic current and the realization reactive power compensation of load, these control strategies are all by respective control
For device module come what is realized, control module includes: to become for detecting the PLL phaselocked loop, PI controller, coordinate of grid side voltage-phase
Change the mold block, comparator.
2. a kind of compensation device as described in claim 1, which is characterized in that full power convertor is using common two level topology
Structure or more level topological structures.
3. a kind of compensation device as claimed in claim 2, which is characterized in that the series connection and parallel connection converter is all to use
The ACDC three-phase full bridge converters of to and fro flow of power, the power module constituted including IGBT, MOSFET full-controlled device, direct current
Hold, output LCL filter.
4. a kind of compensation device as described in claim 1, which is characterized in that the secondary side of the isolation series transformer
Be series at distribution transformer output load between, series transformer be connected to isolation series transformer primary side, parallel connection converter with
Load-side is in parallel.
5. a kind of compensation device as claimed in claim 4, which is characterized in that the series transformer controller includes power grid
Three-phase voltage sampling, the sampling of load-side three-phase voltage, the sampling of series transformer three-phase current, DC voltage sampling, output PWM control
System, condition monitoring, CPU element.
6. a kind of compensation device as claimed in claim 4, which is characterized in that the parallel connection converter controller includes load
The sampling of side three-phase voltage, the sampling of load-side three-phase current, the sampling of parallel connection converter three-phase current, DC voltage sampling, output PWM
Control, condition monitoring, CPU element.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821998566.8U CN209072082U (en) | 2018-11-30 | 2018-11-30 | A kind of power distribution network transformer electric energy quality compensating device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821998566.8U CN209072082U (en) | 2018-11-30 | 2018-11-30 | A kind of power distribution network transformer electric energy quality compensating device |
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| CN209072082U true CN209072082U (en) | 2019-07-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111525574A (en) * | 2020-07-06 | 2020-08-11 | 深圳华工能源技术有限公司 | Harmonic suppression energy-saving and three-phase imbalance treatment energy-saving coordination control method |
-
2018
- 2018-11-30 CN CN201821998566.8U patent/CN209072082U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111525574A (en) * | 2020-07-06 | 2020-08-11 | 深圳华工能源技术有限公司 | Harmonic suppression energy-saving and three-phase imbalance treatment energy-saving coordination control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Power quality compensation device for distribution network transformer Effective date of registration: 20221024 Granted publication date: 20190705 Pledgee: Bank of Nanjing Jiangbei District branch of Limited by Share Ltd. Pledgor: NANJING HEXI ELECTRIC CO.,LTD. Registration number: Y2022320000642 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Granted publication date: 20190705 Pledgee: Bank of Nanjing Jiangbei District branch of Limited by Share Ltd. Pledgor: NANJING HEXI ELECTRIC CO.,LTD. Registration number: Y2022320000642 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right |