CN107785927A - A kind of photovoltaic is from the integrated control system that generates electricity by way of merging two or more grid systems - Google Patents
A kind of photovoltaic is from the integrated control system that generates electricity by way of merging two or more grid systems Download PDFInfo
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- CN107785927A CN107785927A CN201710812890.XA CN201710812890A CN107785927A CN 107785927 A CN107785927 A CN 107785927A CN 201710812890 A CN201710812890 A CN 201710812890A CN 107785927 A CN107785927 A CN 107785927A
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- 238000007599 discharging Methods 0.000 claims abstract description 3
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- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 claims description 2
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- 238000004088 simulation Methods 0.000 claims 1
- 238000011161 development Methods 0.000 abstract description 3
- 238000004146 energy storage Methods 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 description 5
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- 238000005286 illumination Methods 0.000 description 4
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- H02J3/385—
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- H02J13/0017—
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- H02J13/0062—
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- H02J13/0075—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
- H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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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
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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
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
- Y04S10/123—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation the energy generation units being or involving renewable energy sources
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
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Abstract
The present invention discloses a kind of photovoltaic from the integrated control system that generates electricity by way of merging two or more grid systems, and it is comprised the steps of, a, from grid-connected/off-network electricity generation system main circuit system design and optimization；B, from grid-connected/off-network electricity generation system hardware and software control system；C, high-precision maximum power point tracking technique；D, bridge model research and controller design；E, phase shifting full bridge soft switch technology is realized and optimization；F, from the management of grid-connected system modular power and control strategy；G, off-network photovoltaic generating system；H, from the communication module of grid-connected/off-network photovoltaic generating system.It is personal and improve user power utilization quality that the invention mainly solves user's photovoltaic generation, with reference to purpose of design, development resources and realizability, realized from battery charging and discharging module and off-network load port is increased on combining inverter, energy-storage function is added on the premise of inversion efficiency is not lost.
Description
Technical field
The present invention relates to energy source utilizing electricity generating techn field, specially a kind of photovoltaic is from the integrated control system that generates electricity by way of merging two or more grid systems.
Background technology
The development in epoch at any time, distributed photovoltaic power generation project application have raised the curtain, and are proposed in subsequent industry more
Kind solution, wherein photovoltaic get more and more people's extensive concerning from grid-connected integral control system, in the prior art, built from simultaneously
Net integral control system mainly uses two-way inverter to add photovoltaic combining inverter in load-side as system control core
Realize from grid-connected integration, its working method is：In the case of civil power normal power supply, two-way inverter and combining inverter follow
Utility grid exports the electric energy of same waveform, and simultaneously bi-directionally inverter is charged by charge inside control circuit to battery,
In the case of civil power open circuit, the connection of two-way inverter cut-out civil power and internal electric network, given by battery by two-way inverter
Load supplying, while reference power source is provided to combining inverter, two-way inverter is by adjusting the output frequency of itself simultaneously
Net inverter is in work or holding state, for example, the output frequency of two-way inverter standard is 50Hz, when battery
Voltage is higher than the charging cycle voltage set, and two-way inverter will heighten output voltage frequency, so that combining inverter
Isolated island protective effect is produced, combining inverter closes output, and when battery tension is less than float charge voltage, frequency can automatically return to
Initial value, but the method for controlling combining inverter to work by adjusting two-way inverter output frequency can only make combining inverter
In work and holding state, it is impossible to when combining inverter is reduced power output work, therefore being worked during combining inverter
And it is standby, it is low when high during battery tension, the service life of battery is not only influenceed, and cause solar panel energy
Waste.
The content of the invention
It is an object of the invention to provide a kind of photovoltaic from the integrated control system that generates electricity by way of merging two or more grid systems, solves institute in background technology
The problem of proposition.
To solve the above problems, the present invention provides following technical scheme：A kind of photovoltaic from the integrated control system that generates electricity by way of merging two or more grid systems,
It comprises the steps of,
A, from grid-connected/off-network electricity generation system main circuit system design and optimization；
B, from grid-connected/off-network electricity generation system hardware and software control system；
C, high-precision maximum power point tracking technique；
D, bridge model research and controller design；
E, phase shifting full bridge soft switch technology is realized and optimization；
F, from the management of grid-connected system modular power and control strategy；
G, off-network photovoltaic generating system；
H, from the communication module of grid-connected/off-network photovoltaic generating system.
Preferably, step a, mainly wrapped from grid-connected/off-network electricity generation system main circuit system design and optimization, the main circuit
Containing three modules, prime is Boost circuit, realizes the function of maximum power tracing, and rear class is two-way inverter circuit, is realized
Direct current and the two-way flow exchanged, the plug-in charge-discharge modules on bus, realize the charging and discharging to battery, the bus
The energy flow hinge of three kinds of input sources is set to, the height of the busbar voltage is set to inverter control energy flow direction and control
The foundation of device switching processed.
Preferably, step b, from grid-connected/off-network electricity generation system hardware and software control system, the control system includes
DSP/ARM and its peripheral circuit, input voltage and input current feedback and modulate circuit, DC bus-bar voltage collection and modulate circuit, it is inverse
Become each bridge arm output current feedback of device and modulate circuit, line voltage collection and modulate circuit, prime Boost switching tubes PWM
Drive circuit and rear class full bridge driving circuit, charge and discharge control drive circuit, charging current battery voltage detection circuit, phaselocked loop
Circuit and various protection circuits and absorbing circuit, protection circuit include input voltage overvoltage and under-voltage protection, DC bus-bar voltage
Overvoltage with under-voltage protection, output current overcurrent protection, IGBT overcurrent protections, insulation resistance detection circuit, leakage current detection circuit,
Line voltage overvoltage and under-voltage protection, temperature protection and EMI suppression circuits.
Preferably, step e, phase shifting full bridge soft switch technology is realized and optimization, main control chip select IR phase-shifting full-bridge mould
Intend control chip UC2875, main transformer selects EE55 core designs；MOSFET selects ST26NM60N, secondary commutation diode
From DSEI30-06A, absorption diode selects DSEI12-06A, and charging module sets output as 48V30A.
Preferably, step g, off-network photovoltaic generating system, the off-network light power generating system by solar energy transform controller, just
String ripple inverter and boost battery charge circuit three parts composition.Wherein, solar energy transform controller is carried out to photovoltaic cell
Tracing control, it is allowed to be operated in maximum power point, while battery charging process is managed.The effect of sinewave inverter
It is that direct current is converted into 220V sine wave alternating currents, is used for AC load.
Preferably, step h, it is described inverse from grid-connected/off-network photovoltaic from the communication module of grid-connected/off-network photovoltaic generating system
Become device and support multiple communication modes, it is specific as follows：
A, universal serial bus RS485 modes, RS485 cascades are supported, realize the data monitoring of 32；
B, Ethernet real-time communication, built-in WEB SERVER, realized without PC ends upper computer software to more inverters
Real-time data access；
C, WiFi communication, without connection, LAN real time data inspecting is realized, supports data in mobile phone to access.
Compared with prior art, beneficial effects of the present invention are as follows：
First, the power linear of two-way inverter and combining inverter can be controlled to export as needed, realize that system is transported
Row is steady so that electric energy application is more reasonable caused by solar cell array, and not only effectively extend battery uses the longevity
Life, and the energy has been saved, it is more environmentally-friendly；Second, being capable of the two-way inverter of reasonable selection different manufacturers and simultaneously as needed
Net inverter, it is not necessary to specify selection combining inverter according to two-way inverter producer so that build from grid-connected integral system
It is more flexible；3rd, it can progressively disconnect the relatively low load of priority level in the case where electric energy is not very abundant；4th, can
To choose whether to feed to civil power as needed, meet that the diversified system integration requirement of client is easily promoted.
Brief description of the drawings
Fig. 1 is for a kind of photovoltaic of the present invention from the integrative control that generates electricity by way of merging two or more grid systems from the main power model figure of grid-connected/off-network electricity generation system；
Fig. 2 is a kind of system simplification figure of the photovoltaic of the present invention from integrative control dual mode inverter of generating electricity by way of merging two or more grid systems；
Fig. 3 is for a kind of photovoltaic of the present invention from the integrative control that generates electricity by way of merging two or more grid systems from the main power model figure of grid-connected/off-network electricity generation system；
Fig. 4 for a kind of photovoltaic of the present invention from the integrative control that generates electricity by way of merging two or more grid systems from grid-connected/off-network electricity generation system from generating electricity by way of merging two or more grid systems
System block diagram.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Fig. 1-3 are referred to, this practicality invention provides a kind of technical scheme：A kind of photovoltaic is from integrative control system of generating electricity by way of merging two or more grid systems
System, it is comprised the steps of,
A, from grid-connected/off-network electricity generation system main circuit system design and optimization；
B, from grid-connected/off-network electricity generation system hardware and software control system；
C, high-precision maximum power point tracking technique；
D, bridge model research and controller design；
E, phase shifting full bridge soft switch technology is realized and optimization；
F, from the management of grid-connected system modular power and control strategy；
G, off-network photovoltaic generating system；
H, from the communication module of grid-connected/off-network photovoltaic generating system.
Example 1
Based on step e, phase shifting full bridge soft switch technology is realized and optimization
In Full-bridge phase-shifting soft switching circuit, lagging leg realizes that Sofe Switch is more much more difficult than advanced arm, because super
The switching tube of forearm participates in the inductive inductance of resonance and the summation of the equivalent primary side inductance of secondary when opening shut-off, it is easy to
Charge-discharge energy with regard to advanced arm electric capacity can be met.And when lagging leg realizes ZVS, with the inductance of lagging leg capacitor resonance only
Only it is coupling inductance.To realize that the ZVS of lagging leg must have following relationship establishment：
C in formula2=C4Respectively S2And S4Parasitic capacitance.
If inductance L is not clampedP, in circulation ending phase, LPMeeting and CSStart resonance, be reflected in secondary side diode
Concussion, if LSIt is worth bigger, also results in CSVoltage peak is very high, reacts and adds due to voltage spikes on the diode very in secondary
It is high.In order to reduce the voltage of diode, it is necessary to reasonably select former the secondary turn ratio k, k and secondary side diode back-pressure of coupling inductance
There is following relational expression to set up：
U in formulaDS3For S3Open drain-source pressure drop, ISTo flow through clamp winding LSElectric current.In order to reduce secondary side diode
The back-pressure born, need the no-load voltage ratio k of coupling transformer as far as possible small in coupling transformer design, and in order to reduce circuit loss,
Require that K values have to be larger than 1 again, final choice coupling inductance magnetic core PQ3220, former secondary turn ratio k=14：13.5 LP=
30uH。
Example 2
Based on referring to Fig. 3 from the management of grid-connected system modular power and control strategy
And off-network dual mode inverter can be according to different environmental aspects, each module input of adjust automatically or disconnection power
Control unit, realize efficiently making full use of for energy.Specific mode of operation is as follows：
A) parallel network reverse pattern.Connected under normal circumstances with power network in PV modules, system is operated in parallel network reverse pattern.
MPPT controller conveys energy, grid-connected current and line voltage with the same phase of frequency, inverter with peak power to rear class inversion link
With unity power factor 1 to power network feed in energy analysis.When there is load to access, switched by bypass changeover, be directly accessed load
Power network, load energy is provided by power network.
B) grid-connected charge mode.In PV modules, batteries, load and power network access system simultaneously, PV modules are with most
It is high-power to System feeder energy.In illumination abundance, PV modules preferentially supply battery charging energy storage, and dump energy is sent into electricity
Net；When illumination deficiency, battery charging can be supplemented by PWM rectifications by power network；Load energy is directly provided by power network.
C) off-network inverter mode.In PV modules, batteries and load access system simultaneously, PV modules are operated in constant pressure
Power MPPT patterns are limited, preferentially use PV cell panel energy, when illumination abundance, a part of supply load of PV energy uses, separately
A part is for charging a battery；When illumination deficiency, PV cell panels and batteries provide energy to rear class inversion link simultaneously
Amount；When only batteries and load access system, energy is provided to rear class inversion link by discharge circuit from batteries
Amount, used for load.
D) charge mode.When only PV modules and batteries access system, PV modules are operated in constant pressure limit power
MPPT patterns, the rechargeable energy of batteries is provided by PV modules；When power network, batteries and load access system, by electricity
Netcom crosses full bridge PWM rectification and provides battery charging energy.
And each energy stream of off-grid system
Operation principle：It should be noted that the application of the object of invention solves, user's photovoltaic generation is personal and improvement is used
Family power quality, with reference to purpose of design, development resources and and realizability, from combining inverter increase battery charge and discharge
Electric module and off-network load port is realized, adds energy-storage function, while the invention on the premise of inversion efficiency is not lost
The power linear output of two-way inverter and combining inverter is controlled for realizing, realizes that system operation is steady so that solar energy
Electric energy application is more reasonable caused by battery array, not only effectively extends the service life of battery, and has saved the energy,
It is more environmentally-friendly,.
Finally it should be noted that：The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention,
Although the present invention is described in detail with reference to the foregoing embodiments, for those skilled in the art, it still may be used
To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic.
Within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., it should be included in the present invention's
Within protection domain.
Claims (6)
1. a kind of photovoltaic is from the integrated control system that generates electricity by way of merging two or more grid systems, it is characterised in that：It comprises the steps of,
A, from grid-connected/off-network electricity generation system main circuit system design and optimization；
B, from grid-connected/off-network electricity generation system hardware and software control system；
C, high-precision maximum power point tracking technique；
D, bridge model research and controller design；
E, phase shifting full bridge soft switch technology is realized and optimization；
F, from the management of grid-connected system modular power and control strategy；
G, off-network photovoltaic generating system；
H, from the communication module of grid-connected/off-network photovoltaic generating system.
2. a kind of photovoltaic according to claim 1 is from the integrated control system that generates electricity by way of merging two or more grid systems, it is characterised in that：Step a, from simultaneously
Net/off-network electricity generation system main circuit system design and optimization, the main circuit mainly include three modules, and prime is Boost liters
Volt circuit, the function of maximum power tracing is realized, rear class is two-way inverter circuit, realizes direct current and the two-way flow exchanged,
Plug-in charge-discharge modules above bus, realize the charging and discharging to battery, and the bus is set to the energy stream of three kinds of input sources
Dynamic hinge, the height of the busbar voltage are set to the foundation of inverter control energy flow direction and controller switching.
3. a kind of photovoltaic according to claim 1 is from the integrated control system that generates electricity by way of merging two or more grid systems, it is characterised in that：Step b, from simultaneously
Net/off-network electricity generation system hardware and software control system, the control system include DSP/ARM and its peripheral circuit, input electricity
Current voltage feeds back and modulate circuit, DC bus-bar voltage collection and modulate circuit, inverter each bridge arm output current feedback and
Modulate circuit, line voltage collection and modulate circuit, prime Boost switching tubes PWM drive circuit and rear class full bridge driving circuit,
Charge and discharge control drive circuit, charging current battery voltage detection circuit, phase-locked loop circuit and various protection circuits and absorption electricity
Road, protection circuit include input voltage overvoltage and under-voltage protection, DC bus-bar voltage overvoltage and under-voltage protection, output current excessively stream
Protection, IGBT overcurrent protections, insulation resistance detection circuit, leakage current detection circuit, line voltage overvoltage and under-voltage protection, temperature
Protection and EMI suppression circuits.
4. a kind of photovoltaic according to claim 1 is from the integrated control system that generates electricity by way of merging two or more grid systems, it is characterised in that：Step e, phase shift
Full-bridge soft-switching technology is realized and optimization, and main control chip is from IR phase-shifting full-bridge simulation control chip UC2875, main transformer
From EE55 core designs；MOSFET selects ST26NM60N, and secondary commutation diode selects DSEI30-06A, absorption diode
From DSEI12-06A, charging module sets output as 48V30A.
5. a kind of photovoltaic according to claim 1 is from the integrated control system that generates electricity by way of merging two or more grid systems, it is characterised in that：Step g, off-network
Photovoltaic generating system, the off-network light power generating system are quickly filled by solar energy transform controller, sinewave inverter and battery
Circuit three parts form.Wherein, solar energy transform controller is tracked control to photovoltaic cell, is allowed to be operated in maximum work
Rate point, while battery charging process is managed.The effect of sinewave inverter is that direct current is converted into 220V sines
Alternating current wave, used for AC load.
6. a kind of photovoltaic according to claim 1 is from the integrated control system that generates electricity by way of merging two or more grid systems, it is characterised in that：Step h, from simultaneously
The communication module of net/off-network photovoltaic generating system, it is described to support multiple communication modes from grid-connected/off-network photovoltaic DC-to-AC converter, specifically
It is as follows：
A, universal serial bus RS485 modes, RS485 cascades are supported, realize the data monitoring of 32；
B, Ethernet real-time communication, built-in WEB SERVER, realized without PC ends upper computer software to the real-time of more inverters
Data access；
C, WiFi communication, without connection, LAN real time data inspecting is realized, supports data in mobile phone to access.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710812890.XA CN107785927A (en) | 2017-09-11 | 2017-09-11 | A kind of photovoltaic is from the integrated control system that generates electricity by way of merging two or more grid systems |
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| CN109494801A (en) * | 2018-12-25 | 2019-03-19 | 航天柏克(广东)科技有限公司 | One kind is from Grid-connected photovoltaic inverter system |
| CN112467966A (en) * | 2020-11-18 | 2021-03-09 | 江苏为恒智能科技有限公司 | Over-temperature load reduction device and method of light storage integrated inverter |
| CN112817341A (en) * | 2021-02-03 | 2021-05-18 | 阳光电源股份有限公司 | Photovoltaic tracking support control method, photovoltaic tracking controller and photovoltaic tracking system |
| CN113241798A (en) * | 2021-06-11 | 2021-08-10 | 东莞市钜大电子有限公司 | Off-grid and grid-connected photovoltaic inverter working mode switching control method |
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Application publication date: 20180309 |