CN206820476U - Realize the miniature photovoltaic DC-to-AC converter networking coordinated control system that three-phase imbalance is administered - Google Patents
Realize the miniature photovoltaic DC-to-AC converter networking coordinated control system that three-phase imbalance is administered Download PDFInfo
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- CN206820476U CN206820476U CN201720737243.2U CN201720737243U CN206820476U CN 206820476 U CN206820476 U CN 206820476U CN 201720737243 U CN201720737243 U CN 201720737243U CN 206820476 U CN206820476 U CN 206820476U
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
The utility model provides a kind of miniature photovoltaic DC-to-AC converter networking coordinated control system realized three-phase imbalance and administered, including intensity of illumination sensor, tuning controller and miniature photovoltaic DC-to-AC converter group, miniature photovoltaic DC-to-AC converter group includes some miniature photovoltaic DC-to-AC converters, intensity of illumination sensor connects the input of tuning controller, the output end of tuning controller connects miniature photovoltaic DC-to-AC converter respectively, miniature photovoltaic DC-to-AC converter direct grid-connected, miniature photovoltaic DC-to-AC converter are integrated using monoblock battery component with single miniature photovoltaic DC-to-AC converter；This kind realizes the miniature photovoltaic DC-to-AC converter networking coordinated control system that three-phase imbalance is administered, and a kind of hardware unit is provided to realize that three-phase imbalance is administered.The system, reasonable in design, cost is low, and power attenuation is small, and stable performance is simple and reliable, plug and play, is easy to use.
Description
Technical field
It the utility model is related to a kind of miniature photovoltaic DC-to-AC converter networking coordinated control system realized three-phase imbalance and administered.
Background technology
In rural power grids, the three-phase imbalance problem of its distribution network annoyings power supply unit always.Medial ＆ Low Voltage Power Network
It is after 10/0.4kV transformer pressure-reducings mostly, is three-phase productive power and single-phase load with three-phase four-wire system to customer power supply
Mix the supply network of electricity consumption.
Due to the uncontrollable increase-volume of single-phase user, the access of great power single phase load and single-phase load electricity consumption difference when
Property etc., all cause the imbalance of threephase load.If low voltage electric network is run in the case of three-phase load unbalance degree is larger, it will
Had undesirable effect to low voltage electric network and electrical equipment.
Due to the fast development of distributed photovoltaic power generation, domestic consumer's installation single-phase photovoltaic power generation system.Ground by correlation
Study carefully it can be found that a kind of selection that single-phase photovoltaic inverter can compensate as reactive-load compensation harmonic.Meanwhile with single-phase photovoltaic
Inverter, which administers three-phase imbalance problem, turns into a kind of possible.
Photovoltaic generation is a kind of most common energy utilization patterns of solar energy, in photovoltaic generating system, traditional photovoltaic
Inverter is connected using multiple photovoltaic modulies, and dc bus connects grid-connected inverters.The structure there is shortcomings, including：Compared with
Big power attenuation, unstable power generation performance etc..
Above mentioned problem should be paid attention to simultaneously in the design process of miniature photovoltaic DC-to-AC converter networking coordinated control system
Solve the problems, such as.
Utility model content
The purpose of this utility model is to provide a kind of miniature photovoltaic DC-to-AC converter networking for realizing that three-phase imbalance is administered and coordinated
Control system, a kind of hardware unit is provided to realize that three-phase imbalance is administered.
Technical solution of the present utility model is：
A kind of miniature photovoltaic DC-to-AC converter networking coordinated control system realized three-phase imbalance and administered, including intensity of illumination pass
Sensor, tuning controller and miniature photovoltaic DC-to-AC converter group, miniature photovoltaic DC-to-AC converter group include some miniature photovoltaic DC-to-AC converters, illumination
Intensity sensor connects the input of tuning controller, and the output end of tuning controller connects miniature photovoltaic DC-to-AC converter respectively, micro-
Type photovoltaic DC-to-AC converter direct grid-connected, miniature photovoltaic DC-to-AC converter are mutually collected using monoblock battery component with single miniature photovoltaic DC-to-AC converter
Into.
Further, miniature photovoltaic DC-to-AC converter includes photovoltaic module, electric capacity C1, electric capacity C2, FET M1, diode
D1, inductance L1, transformer T1, FET M2, diode D2, diode D3, electric capacity C3, rectifier bridge, electric capacity C4 and inductance L2,
Photovoltaic module shunt capacitance C1, the cathode output end of photovoltaic module are connected to FET M1 one end and two poles by electric capacity C2
The intersection of pipe D1 negative pole, the cathode output end of photovoltaic module are also connected with one end of transformer T1 primary side windings, photovoltaic module
Cathode output end also by inductance L1 be connected to the FET M1 other end and diode D1 positive pole intersection,
The other end of transformer T1 primary side windings, FET M2 one end and the intersection of diode D2 negative pole, photovoltaic module
Cathode output end is connected to the intersection of the FET M2 other end and diode D2 positive pole, FET M1 control
End, FET M2 control terminal connect the output end of tuning controller respectively；One end connection two of transformer T1 vice-side windings
Pole pipe D3 positive pole, the electrode input end of diode D3 negative pole connection rectifier bridge and the intersection of electric capacity C3 one end, transformation
The intersection of the negative input and the electric capacity C3 other end of the other end connection rectifier bridge of device T1 vice-side windings, rectifier bridge is just
Pole output end, cathode output end connect electric capacity C4 both ends respectively, and the cathode output end of rectifier bridge passes through inductance L2 connection batteries
The positive pole of component, the negative pole of the cathode output end connection battery component of rectifier bridge.
Further, output end of the rectifier bridge by four Group of Silicon Controlled Rectifier into the control terminal connection tuning controller of, controllable silicon.
Further, in addition to three-phase current detection Current Transformer and detecting voltage by three phase voltage transformer, three
Phase current sensing Current Transformer is connected at the points of common connection that miniature photovoltaic DC-to-AC converter is connected in power network respectively, three-phase
Voltage detecting is connected in parallel at the points of common connection that miniature photovoltaic DC-to-AC converter is connected in power network respectively with voltage transformer, three-phase electricity
Stream detection current transformer and detecting voltage by three phase connect the input of tuning controller with voltage transformer respectively.
The beneficial effects of the utility model are：This kind realizes that the miniature photovoltaic DC-to-AC converter networking that three-phase imbalance is administered is coordinated
Control system, a kind of hardware unit is provided to realize that three-phase imbalance is administered.The system, reasonable in design, cost is low, power
Small, stable performance is lost, simple and reliable, plug and play, is easy to use.
Brief description of the drawings
Fig. 1 is that the utility model embodiment realizes that control system is coordinated in the miniature photovoltaic DC-to-AC converter networking that three-phase imbalance is administered
The explanation block diagram of system.
Fig. 2 is the circuit connection diagram of miniature photovoltaic DC-to-AC converter in embodiment.
Wherein, 1- intensities of illumination sensor, 2- three-phase current detection Current Transformers, 3- detecting voltage by three phase voltages
Transformer, 4- tuning controllers, the miniature photovoltaic DC-to-AC converters of 5-.
Embodiment
Describe preferred embodiment of the present utility model in detail below in conjunction with the accompanying drawings.
Embodiment
A kind of miniature photovoltaic DC-to-AC converter networking coordinated control system realized three-phase imbalance and administered, such as Fig. 1, including illumination
5 groups of intensity sensor 1, tuning controller 4 and miniature photovoltaic DC-to-AC converter, miniature 5 groups of photovoltaic DC-to-AC converter include some miniature photovoltaics
Inverter 5, intensity of illumination sensor 1 connect the input of tuning controller 4, and the output end of tuning controller 4 connects micro- respectively
Type photovoltaic DC-to-AC converter 5, the miniature direct grid-connected of photovoltaic DC-to-AC converter 5, miniature photovoltaic DC-to-AC converter 5 using monoblock battery component with it is single micro-
Type photovoltaic DC-to-AC converter 5 is integrated.
This kind realizes the miniature photovoltaic DC-to-AC converter networking coordinated control system that three-phase imbalance is administered, to realize three-phase injustice
Weighing apparatus, which is administered, provides a kind of hardware unit.The system, reasonable in design, cost is low, and power attenuation is small, stable performance, simply may be used
Lean on, plug and play, be easy to use.
Also include three-phase current detection Current Transformer 2 and detecting voltage by three phase voltage transformer 3, three-phase current inspection
Survey Current Transformer 2 is connected on miniature photovoltaic DC-to-AC converter 5 and is connected at the points of common connection in power network respectively, three-phase voltage inspection
Survey is connected in parallel at the points of common connection that miniature photovoltaic DC-to-AC converter 5 is connected in power network respectively with voltage transformer 3, three-phase current inspection
Survey Current Transformer 2 and detecting voltage by three phase connects the input of tuning controller 4 with voltage transformer 3 respectively.
In embodiment, tuning controller 4 uses the tuning controller 4 based on ARM and FPGA.Pass through intensity of illumination sensor
1 detects the intensity of illumination of photovoltaic cell local environment in real time, can obtain intensity of illumination coefficient.To the miniature light being connected in power network
PCC at the points of common connection of inverter 5 is lied prostrate, detects three-phase electricity flow valuve, and its three-phase voltage value, can by current imbalance formula
Calculate three-phase current unbalance degree.
Intensity of illumination coefficient and three-phase current unbalance degree are combined together by tuning controller 4 using fuzzy algorithmic approach, excellent
Change the power output matching scheme of miniature photovoltaic DC-to-AC converter 5, determine that photovoltaic cell is uneven and administer power match coefficient.
Such as Fig. 2, miniature photovoltaic DC-to-AC converter 5 include photovoltaic module, electric capacity C1, electric capacity C2, FET M1, diode D1,
Inductance L1, transformer T1, FET M2, diode D2, diode D3, electric capacity C3, rectifier bridge, electric capacity C4 and inductance L2, light
Modules in parallel electric capacity C1 is lied prostrate, the cathode output end of photovoltaic module is connected to FET M1 one end and diode by electric capacity C2
The intersection of D1 negative pole, the cathode output end of photovoltaic module are also connected with one end of transformer T1 primary side windings, photovoltaic module
Cathode output end is also connected to the intersection of the FET M1 other end and diode D1 positive pole by inductance L1, become
The other end of depressor T1 primary side windings, FET M2 one end and the intersection of diode D2 negative pole, photovoltaic module are born
Pole output end is connected to the intersection of the FET M2 other end and diode D2 positive pole, FET M1 control terminal,
FET M2 control terminal connects the output end of tuning controller 4 respectively；One end of transformer T1 vice-side windings connects two poles
Pipe D3 positive pole, the electrode input end of diode D3 negative pole connection rectifier bridge and the intersection of electric capacity C3 one end, transformer
The intersection of the negative input and the electric capacity C3 other end of the other end connection rectifier bridge of T1 vice-side windings, the positive pole of rectifier bridge
Output end, cathode output end connect electric capacity C4 both ends respectively, and the cathode output end of rectifier bridge passes through inductance L2 connection battery packs
The positive pole of part, the negative pole of the cathode output end connection battery component of rectifier bridge.Rectifier bridge is by four Group of Silicon Controlled Rectifier into controllable silicon
Control terminal connects the output end of tuning controller 4.
The control system of miniature photovoltaic DC-to-AC converter 5 of embodiment, it can realize that three-phase imbalance is administered using following methods.Data
Detection includes：The solar radiation intensity of whole day 24h periods is gathered by photovoltaic module first and draws intensity of illumination system
Number, while photovoltaic inverter grid-connected point PCC three-phase currents/magnitude of voltage is detected, calculate tri-phase unbalance factor.Attachment coefficient and injustice
Weighing apparatus degree, using FUZZY ALGORITHMS FOR CONTROL, photovoltaic power distribution coefficient is determined, establishes the distribution side of photovoltaic DC-to-AC converter power output
Case；And three-phase current and three-phase voltage are calculated using instantaneous symmetrical components, isolate positive-negative sequence current and zero sequence electricity
Stream, controller is administered by three-phase imbalance and controls Miniature inverter to realize active under positive sequence and reactive-current compensation, Yi Jiling
Negative-sequence current eliminates.
Claims (4)
- A kind of 1. miniature photovoltaic DC-to-AC converter networking coordinated control system realized three-phase imbalance and administered, it is characterised in that：Including Intensity of illumination sensor, tuning controller and miniature photovoltaic DC-to-AC converter group, miniature photovoltaic DC-to-AC converter group include some miniature photovoltaics Inverter, intensity of illumination sensor connect the input of tuning controller, and the output end of tuning controller connects miniature light respectively Inverter is lied prostrate, miniature photovoltaic DC-to-AC converter direct grid-connected, miniature photovoltaic DC-to-AC converter is using monoblock battery component and single miniature photovoltaic Inverter is integrated.
- 2. the miniature photovoltaic DC-to-AC converter networking coordinated control system as claimed in claim 1 realized three-phase imbalance and administered, its It is characterised by：Miniature photovoltaic DC-to-AC converter include photovoltaic module, electric capacity C1, electric capacity C2, FET M1, diode D1, inductance L1, Transformer T1, FET M2, diode D2, diode D3, electric capacity C3, rectifier bridge, electric capacity C4 and inductance L2, photovoltaic module is simultaneously Join electric capacity C1, the cathode output end of photovoltaic module is connected to FET M1 one end and diode D1 negative pole by electric capacity C2 Intersection, the cathode output end of photovoltaic module is also connected with one end of transformer T1 primary side windings, the positive pole output of photovoltaic module End is also connected to intersection, the transformer T1 originals of the FET M1 other end and diode D1 positive pole by inductance L1 The other end of side winding, FET M2 one end and the intersection of diode D2 negative pole, the cathode output end of photovoltaic module It is connected to the intersection of the FET M2 other end and diode D2 positive pole, FET M1 control terminal, FET M2 control terminal connects the output end of tuning controller respectively；One end connection diode D3 of transformer T1 vice-side windings is just Pole, the intersection of electrode input end and the electric capacity C3 of diode D3 negative pole connection rectifier bridge one end, transformer T1 secondary around The intersection of the negative input and the electric capacity C3 other end of the other end connection rectifier bridge of group, the cathode output end of rectifier bridge, Cathode output end connects electric capacity C4 both ends respectively, the cathode output end of rectifier bridge by inductance L2 connections battery component just Pole, the negative pole of the cathode output end connection battery component of rectifier bridge.
- 3. the miniature photovoltaic DC-to-AC converter networking coordinated control system as claimed in claim 2 realized three-phase imbalance and administered, its It is characterised by：Rectifier bridge is by four Group of Silicon Controlled Rectifier into the control terminal of controllable silicon connects the output end of tuning controller.
- 4. the miniature photovoltaic DC-to-AC converter networking coordinated control system as claimed in claim 1 realized three-phase imbalance and administered, its It is characterised by：Also include three-phase current detection Current Transformer and detecting voltage by three phase voltage transformer, three-phase current inspection Survey Current Transformer to be connected on respectively at the points of common connection that miniature photovoltaic DC-to-AC converter is connected in power network, detecting voltage by three phase It is connected in parallel on respectively at the points of common connection that miniature photovoltaic DC-to-AC converter is connected in power network with voltage transformer, three-phase current detection is used Current transformer and detecting voltage by three phase connect the input of tuning controller with voltage transformer respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720737243.2U CN206820476U (en) | 2017-06-22 | 2017-06-22 | Realize the miniature photovoltaic DC-to-AC converter networking coordinated control system that three-phase imbalance is administered |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720737243.2U CN206820476U (en) | 2017-06-22 | 2017-06-22 | Realize the miniature photovoltaic DC-to-AC converter networking coordinated control system that three-phase imbalance is administered |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109995058A (en) * | 2019-03-27 | 2019-07-09 | 国网青海省电力公司黄化供电公司 | A kind of device and its workflow of the improvement three-phase imbalance for low voltage electric network |
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- 2017-06-22 CN CN201720737243.2U patent/CN206820476U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109995058A (en) * | 2019-03-27 | 2019-07-09 | 国网青海省电力公司黄化供电公司 | A kind of device and its workflow of the improvement three-phase imbalance for low voltage electric network |
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