CN208548715U - A kind of power distribution network transformer electric energy quality synthesis compensation apparatus - Google Patents
A kind of power distribution network transformer electric energy quality synthesis compensation apparatus Download PDFInfo
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- CN208548715U CN208548715U CN201820638741.6U CN201820638741U CN208548715U CN 208548715 U CN208548715 U CN 208548715U CN 201820638741 U CN201820638741 U CN 201820638741U CN 208548715 U CN208548715 U CN 208548715U
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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 synthesis compensation apparatus, 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.The utility model is capable of the generally existing power quality problem of comprehensive treatment power distribution network, such as voltage and current imbalance, the problems such as harmonic current, reactive current, comprehensive a variety of traditional power quality controlling functions of the equipments and one, installation space and equipment input cost are reduced, there is good economic benefit.
Description
Technical field
The utility model relates to field of distribution network, and in particular to a kind of power distribution network transformer power quality comprehensive compensation dress
It sets.
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 harmonic problem (APF) is solved, power quality controlling generally requires great amount of investment, lacks comprehensive and economic solution
The certainly method and apparatus of power quality, the requirement with power distribution network to power quality is higher and higher, comprehensive and economic solution electric energy
The effect of the equipment of 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 synthesis compensation apparatus, it should
Device passes through in distribution transformer high-pressure side or low-pressure side installation full power convertor (VSC) and isolation series transformer, dynamic
Adjust output voltage and unbalance voltage, the out-of-balance current of load, harmonic current and realization reactive power compensation.
Preferably, the full power convertor includes: that the series transformer that power distribution network transformer side is arranged in and setting exist
The parallel connection converter of load-side.
Preferably, the secondary side of the isolation series transformer is series between distribution transformer output and load, the string
Connection converter is connected to isolation series transformer primary side, and the parallel connection converter is in parallel with load-side.
Preferably, the parallel connection converter, for controlling the stabilization of full power convertor (VSC) DC voltage, for solving
Never balanced balanced current, reactive compensation and harmonic wave current problems；The series transformer, for for solving unbalance voltage and electricity
Press fluctuation problem.
Preferably, grid side series transformer and load-side parallel connection converter all use vector controlled, control hardware module
It include: the PLL phaselocked loop, PI controller, coordinate transformation module, comparator for detecting grid side voltage-phase.
The utility model has the advantages that
(1) the utility model provides a kind of solution power distribution network transformer power quality harnessed synthetically scheme, passes through power grid
Transformer series converter solves the problems, such as Voltage unbalance and reactive compensation, solves current imbalance by load parallel connection converter
And harmonic problem, can to distribution voltage and current imbalance, harmonic wave control, reactive compensation comprehensive compensation, reduce power quality
Controlling input cost；
(2) the utility model crosses detection transformer terminal or load terminal voltage electric current, by the positive-negative sequence for adjusting voltage and current
Component adaptively realizes the balance control of voltage, has compared with hard real-time and robustness；
(3) the utility model passes through dynamic compensating reactive power current control power grid by the voltage and current of detection transformer terminal
Power factor in real time, linearly solves the problems, such as idle.
(4) the utility model extracts harmonic current components, control harmonic current is 0, right by the electric current of detection load-side
The eradicating efficacy of particular harmonic is significant.
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 topological diagrams of power distribution network transformer synthesis compensation device of the utility model；
Fig. 3 shows a kind of control block diagram of power distribution network transformer synthesis compensation device of the utility model；
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 topological diagrams of power distribution network transformer synthesis compensation device of the utility model, give distribution
The specific embodiment that net transformer voltage current imbalance, harmonic wave control, reactive power compensation integrated compensation control.Series connection side structure
It is connected between power grid and load for isolation series transformer pair side, isolation series transformer primary side connects full power convertor
(VSC) series transformer, side structure in parallel are that the parallel connection converter of full power convertor (VSC) is connected in parallel on load-side.
The converter of connection load-side is known as parallel connection converter, is mainly used to control full power convertor (VSC) direct current
The stabilization of pressure, current three-phase imbalance, power factor compensation and harmonic current compensation.Connection isolation series transformer primary side
Converter is known as series transformer, is mainly used for control the supply voltage of 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, just by voltage close loop control
Load voltage be can control on arbitrary set point.
The isolation series transformer is series between distribution transformer output and load, the string of the full power convertor
Connection converter is connected to isolation series transformer primary side, and the parallel connection converter of full power convertor is in parallel with load-side, the power grid
The series transformer of side is for solving the problems, such as unbalance voltage and voltage fluctuation, and the parallel connection converter of the load-side is for solving
Out-of-balance current, reactive compensation and/or harmonic current problem.
Solve the problems, such as power distribution network transformer voltage imbalance and voltage fluctuation, specifically include such as under type: detection distribution becomes
Depressor end voltage, and the positive and negative order components by extracting voltage, control negative sequence voltage is 0, and control positive sequence voltage is rated value,
Solve the problems, such as the imbalance and voltage fluctuation of voltage.
It solves the problems, such as that load-side current imbalance is specifically included such as under type: detecting the electric current of load-side, extract electric current
Positive and negative order components, control negative-sequence current are 0, solve the imbalance problem of electric current.
It solves the problems, such as that Power Distribution Network Reactive Power Compensation is specifically included such as under type: detecting the voltage and current of transformer terminal, lead to
Crossing dynamic compensating reactive power current control power factor of electric network is 1, in real time, linearly solves the problems, such as reactive compensation.
It solves power distribution network transformer harmonic problem to specifically include such as under type: detecting the voltage of load end, pass through PLL locking phase
Ring obtains locking phase, and by the electric current of detection load-side, extracts harmonic current components, and control harmonic current is 0, is realized
The harmonic wave control of electric current.
By using closed-loop control to full power convertor (VSC), unbalance voltage, out-of-balance current, nothing are adjusted in real time
Function compensation and harmonic wave control.
The positive and negative order components of voltage and the positive and negative order components of electric current are extracted by broad sense second order integro point-score.
Fig. 3 shows a kind of compensation of power distribution network transformer synthesis using full power convertor (VSC) as the utility model
The specific control block diagram of device embodiments.
Grid side series transformer and load-side parallel connection converter all use vector controlled, and control hardware module includes: use
It (by taking PI as an example, needs that it can be used according to the actual situation in PLL phaselocked loop, the PI controller of detection grid side voltage-phase
The controller of his type), coordinate transformation module (abc/dq transformation and dq/abc converter), comparator etc..Pass through vector controlled
Can keep each specified rate (including DC voltage, net side power, voltage on line side positive sequence negative phase-sequence d axis q axis component, load-side electricity
Stream positive sequence negative phase-sequence d axis q axis component) reach setting value.
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 (3)
1. kind of power distribution network transformer electric energy quality synthesis compensation apparatus, the device pass through in distribution transformer high-pressure side or low-pressure side
Full power convertor and isolation series transformer, the imbalance electricity of dynamic regulation output voltage and unbalance voltage, load are installed
Stream, harmonic current and realization reactive power compensation；
The full power convertor includes: the series transformer that power distribution network transformer side is arranged in and parallel connection that load-side is arranged in
Converter；
The secondary side of the isolation series transformer is series between distribution transformer output and load, and the series transformer is connected to
Series transformer primary side is isolated, the parallel connection converter is in parallel with load-side.
2. compensation device as described in claim 1, which is characterized in that the parallel connection converter, for controlling total power unsteady flow
The stabilization of device DC voltage, for solving out-of-balance current, reactive compensation and harmonic wave current problems；The series transformer is used
In solving the problems, such as unbalance voltage and voltage fluctuation.
3. compensation device as claimed in claim 1 or 2, which is characterized in that the grid side series transformer and load-side are simultaneously
Connection converter all uses vector controlled, and control hardware module includes: PLL phaselocked loop, the PI for detecting grid side voltage-phase
Controller, coordinate transformation module, comparator.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820638741.6U CN208548715U (en) | 2018-05-02 | 2018-05-02 | A kind of power distribution network transformer electric energy quality synthesis compensation apparatus |
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| CN201820638741.6U CN208548715U (en) | 2018-05-02 | 2018-05-02 | A kind of power distribution network transformer electric energy quality synthesis compensation apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108306317A (en) * | 2018-05-02 | 2018-07-20 | 南京赫曦电气有限公司 | A kind of power distribution network transformer electric energy quality synthesis compensation apparatus and its method |
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2018
- 2018-05-02 CN CN201820638741.6U patent/CN208548715U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108306317A (en) * | 2018-05-02 | 2018-07-20 | 南京赫曦电气有限公司 | A kind of power distribution network transformer electric energy quality synthesis compensation apparatus and its method |
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