CN205945097U - High -power photovoltaic inverter - Google Patents
High -power photovoltaic inverter Download PDFInfo
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- CN205945097U CN205945097U CN201620962568.6U CN201620962568U CN205945097U CN 205945097 U CN205945097 U CN 205945097U CN 201620962568 U CN201620962568 U CN 201620962568U CN 205945097 U CN205945097 U CN 205945097U
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Abstract
The utility model relates to a solar photovoltaic power generation technology field, concretely relates to high -power photovoltaic inverter, it includes: a plurality of DC circuit, every DC circuit is including looping through photovoltaic board, direct current breaker, the direct current filter module that double -phase power cord is connected, the contravariant conversion module who is connected respectively with a plurality of DC circuit, one with contravariant conversion module's alternating current circuit, including looping through interchange filter module, power transmission control circuit and the alternating current circuit ware that three -phase power line connects. The utility model discloses a high -power photovoltaic inverter includes power transmission control circuit, and the direct current voltage sent out when the photovoltaic board satisfies and starts the contravariant conversion when being incorporated into the power networks the condition and be incorporated into the power networks, realizes automatic control, effectively protects the electric wire netting.
Description
Technical field
This utility model is related to solar photovoltaic technology field and in particular to a kind of high-power photovoltaic inverter.
Background technology
Photovoltaic DC-to-AC converter of the prior art generally requires before grid-connected and detects whether to meet grid-connected conditions.
In consideration of it, overcoming above defect of the prior art, a kind of new photovoltaic DC-to-AC converter is provided to become this area urgently
The technical problem solving.
Content of the invention
The purpose of this utility model is the drawbacks described above for prior art, provides a kind of high-power photovoltaic inverter.
The purpose of this utility model can be realized by following technical measures：
A kind of high-power photovoltaic inverter, compared with prior art, its difference is, it includes：
Multiple DC loops, each DC loop includes photovoltaic panel, the direct current interruption passing sequentially through two-phase power supply line connection
Device, DC filtering module；
The inversion modular converter being connected respectively with multiple DC loops；
One ac circuit with inversion modular converter, including the ac filter mould passing sequentially through three-phase power line connection
Block, power transmission control circuit and AC circuit breaker；
Located at first charging capacitor at inversion modular converter DC loop end, it is located at the plurality of DC loop and inversion
Between modular converter, the first charging capacitor two ends are connected with two-phase voltage bus respectively；
The second charging capacitor in ac circuit, it is located between ac filter module and power transmission control circuit, the
Two charging capacitors are formed by three single-phase capacitance trianglees connections, and the triangle connection of described second charging capacitor includes three and connects
Line end, three terminals are connected with three-phase voltage bus respectively；
Wherein, power transmission control circuit includes：
First contactor between ac filter module and AC circuit breaker；
The second contactor being serially connected and first resistor, second contactor and first resistor series connection after formed loop with
First contactor is in parallel；
It is used for detecting the DC voltage detection mould of DC voltage value between multiple DC loops and inversion modular converter
Block；
The electricity availability decision circuitry being connected with DC voltage detection module, for by DC voltage detection module gained
Magnitude of voltage, compared with a threshold value, sends the first control signal when magnitude of voltage is more than threshold value, sends out when magnitude of voltage is less than threshold value
Send the second control signal；
Receive the first control signal/the second control signal and control the control module of first contactor closure/disconnection.
Preferably, it is additionally provided with the first lightning protection device between described photovoltaic panel and dc circuit breaker, the two of described first lightning protection device
End is connected with two-phase voltage bus respectively.
Preferably, it is additionally provided with the second lightning protection device being connected with three-phase voltage bus respectively after described AC circuit breaker.
Preferably, described inversion modular converter includes IGBT power model parallel with one another and PWM module.
High-power photovoltaic inverter of the present utility model includes power transmission control circuit, the DC voltage sent out when photovoltaic panel
Meet during grid-connected conditions start inversion conversion grid-connected, realize automatically controlling, effective protection electrical network.
Brief description
Fig. 1 is the structured flowchart of high-power photovoltaic inverter of the present utility model.
Fig. 2 is the circuit diagram of high-power photovoltaic inverter of the present utility model.
Fig. 3 is the circuit diagram of high-power photovoltaic inverter of the present utility model.
Specific embodiment
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with the accompanying drawings and specifically
Embodiment is described in further detail to this utility model.It should be appreciated that specific embodiment described herein is only in order to solve
Release this utility model, be not used to limit this utility model.
Hereinafter, refer to the attached drawing to be more fully understood many aspects of the present utility model.Part in accompanying drawing may not
It is drawn to scale.Alternatively, it is preferred that emphasis is clearly demonstrate part of the present utility model.Additionally, in the accompanying drawings some regard
In figure, identical reference indicates corresponding part.
" exemplary " or " illustrative " expression are as example, example or explanation as used herein, the word.Herein retouch
State any embodiment for " exemplary " or " illustrative " to be not necessarily to be construed as with respect to other embodiment being preferred or having
Profit.All embodiments described below are illustrative embodiments, provide these illustrative embodiments be in order that
Those skilled in the art make and using embodiment of the disclosure and expection be not intended to limit the scope of the present disclosure, the disclosure
Scope is defined by the claims.In other embodiments, describe in detail known to feature and method so as not to obscure this
Utility model.For purpose described herein, term " on ", D score, "left", "right", "front", "rear", " vertical ", " level " and
Its derivative words will be relevant with the utility model that such as Fig. 1 orients.And, have no intent to be subject to technical field above, background technology,
Any theoretical restriction expressed or imply being given in content of the invention or detailed description below.It should also be clear that it is shown in the drawings
It is the utility model design limiting in the following claims with the concrete device described in discussion below book and process
Simple examples embodiment.Therefore, the concrete size related to presently disclosed embodiment and other physical features should be by
It is interpreted as restricted, unless claims are separately clearly stated.
Fig. 1 shows a kind of high-power photovoltaic inverter, and it includes：Multiple DC loops, an inversion modular converter 40
With an ac circuit, wherein, each DC loop includes photovoltaic panel 10, the direct current interruption passing sequentially through two-phase power supply line connection
Device 20, DC filtering module 30；Ac circuit includes ac filter module 50, the power transmission control passing sequentially through three-phase power line connection
Circuit 60 processed and AC circuit breaker 70.In addition, this high-power photovoltaic inverter also includes returning located at inversion modular converter 40 direct current
First charging capacitor 81 of terminal, its between multiple DC loops and inversion modular converter 40, the first 81 liang of charging capacitor
End is connected with two-phase voltage bus respectively, and its structure refers to electric capacity C in Fig. 2.This high-power photovoltaic inverter is also included located at friendship
Flow back to the second charging capacitor 82 in road, it is located between ac filter module 50 and power transmission control circuit 60, the second charging electricity
Hold 82 to be formed by three single-phase capacitance trianglees connections, the triangle of described second charging capacitor connects and includes three terminals,
Three terminals are connected with three-phase voltage bus respectively；Its structure refers to electric capacity C1 in Fig. 2.
Specifically, power transmission control circuit 60 includes：First contactor 61, second contactor 62, first resistor 63, unidirectional current
Pressure detection module 64, electricity availability decision circuitry 65 and control circuit 66, first contactor 61 is located at ac filter module 50
And AC circuit breaker 70 between；Second contactor 62 and first resistor 63 are serially connected, second contactor 62 and first resistor 63
The loop being formed after series connection is in parallel with first contactor 61；DC voltage detection module 64 turns located at multiple DC loops and inversion
Between die change block 40, for detecting DC voltage value；Electricity availability decision circuitry 65 is connected with DC voltage detection module 64,
For DC voltage detection module 64 gained magnitude of voltage is compared with a threshold value, send the first control when magnitude of voltage is more than threshold value
Signal processed, sends the second control signal when magnitude of voltage is less than threshold value；Control module 66 receives the first control signal/the second and controls
Signal simultaneously controls first contactor 61 to close/disconnect.
When circuit is normal, AC circuit breaker 70 closes, and as Q2 closes；Second contactor 62 closes into line precharge, the
One charging capacitor 81（Electric capacity C in Fig. 2）Charge, when the first charging capacitor 81 charges to 470～490DC, automatically disconnect, disconnect
Time is 3s；DC voltage detection module 64 is connected with DC filtering module 30, for detecting DC voltage value；Electricity availability
Decision circuitry 65 is connected with DC voltage detection module 64, for by DC voltage detection module 64 gained magnitude of voltage and a threshold value
Compare, threshold value is to start grid-connected minimum amount of voltage that, send the first control signal when magnitude of voltage is more than threshold value, work as electricity
Pressure value sends the second control signal when being less than threshold value；Control module 66 receives the first control signal/the second control signal and controls
First contactor 61 closes/disconnects.
Further, it is additionally provided with the first lightning protection device 91, described first lightning protection device between photovoltaic panel 10 and dc circuit breaker 20
91 two ends are connected with two-phase voltage bus respectively.It is additionally provided with after AC circuit breaker 70 and to be connected with three-phase voltage bus respectively
Second lightning protection device 92.Inversion modular converter 40 includes IGBT power model parallel with one another and PWM module.
High-power photovoltaic inverter of the present utility model includes power transmission control circuit, the DC voltage sent out when photovoltaic panel
Meet during grid-connected conditions start inversion conversion grid-connected, realize automatically controlling, effective protection electrical network.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all this
Any modification, equivalent and improvement made within the spirit of utility model and principle etc., should be included in this utility model
Protection domain within.
Claims (4)
1. a kind of high-power photovoltaic inverter is it is characterised in that it includes：
Multiple DC loops, each DC loop includes passing sequentially through the photovoltaic panel of two-phase power supply line connection, dc circuit breaker, straight
Stream filtration module；
The inversion modular converter being connected respectively with multiple DC loops；
One ac circuit with inversion modular converter, including pass sequentially through three-phase power line connection ac filter module, give
Electric control circuit and AC circuit breaker；
Located at first charging capacitor at inversion modular converter DC loop end, it is located at the plurality of DC loop and inversion conversion
Between module, the first charging capacitor two ends are connected with two-phase voltage bus respectively；
The second charging capacitor in ac circuit, it is located between ac filter module and power transmission control circuit, and second fills
Electric capacity is formed by three single-phase capacitance trianglees connections, and the triangle of described second charging capacitor connects and includes three wiring
End, three terminals are connected with three-phase voltage bus respectively；
Wherein, power transmission control circuit includes：
First contactor between ac filter module and AC circuit breaker；
The loop and first being formed after the second contactor being serially connected and first resistor, second contactor and first resistor series connection
Catalyst is in parallel；
It is used for detecting the DC voltage detection module of DC voltage value between multiple DC loops and inversion modular converter；
The electricity availability decision circuitry being connected with DC voltage detection module, for by DC voltage detection module gained voltage
Value, compared with a threshold value, sends the first control signal when magnitude of voltage is more than threshold value, sends the when magnitude of voltage is less than threshold value
Two control signals；
Receive the first control signal/the second control signal and control the control module of first contactor closure/disconnection.
2. high-power photovoltaic inverter according to claim 1 it is characterised in that described photovoltaic panel and dc circuit breaker it
Between be additionally provided with the first lightning protection device, the two ends of described first lightning protection device are connected with two-phase voltage bus respectively.
3. high-power photovoltaic inverter according to claim 1 is it is characterised in that be additionally provided with after described AC circuit breaker
The second lightning protection device being connected with three-phase voltage bus respectively.
4. high-power photovoltaic inverter according to claim 1 is it is characterised in that described inversion modular converter includes mutually
IGBT power model in parallel and PWM module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620962568.6U CN205945097U (en) | 2016-08-26 | 2016-08-26 | High -power photovoltaic inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620962568.6U CN205945097U (en) | 2016-08-26 | 2016-08-26 | High -power photovoltaic inverter |
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| Publication Number | Publication Date |
|---|---|
| CN205945097U true CN205945097U (en) | 2017-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620962568.6U Active CN205945097U (en) | 2016-08-26 | 2016-08-26 | High -power photovoltaic inverter |
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| CN (1) | CN205945097U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110435450A (en) * | 2019-08-14 | 2019-11-12 | 湖北省电力装备有限公司 | The bidirectional electric automobile wireless charging system of intelligent lamp rod |
-
2016
- 2016-08-26 CN CN201620962568.6U patent/CN205945097U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110435450A (en) * | 2019-08-14 | 2019-11-12 | 湖北省电力装备有限公司 | The bidirectional electric automobile wireless charging system of intelligent lamp rod |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |