CN103746405A - Photovoltaic off-grid/grid-connection integrated control system - Google Patents
Photovoltaic off-grid/grid-connection integrated control system Download PDFInfo
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- CN103746405A CN103746405A CN201410047777.3A CN201410047777A CN103746405A CN 103746405 A CN103746405 A CN 103746405A CN 201410047777 A CN201410047777 A CN 201410047777A CN 103746405 A CN103746405 A CN 103746405A
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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
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
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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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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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
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
Abstract
The invention relates to the field of energy power generation, in particular to a photovoltaic off-grid/grid-connection integrated control system. The integrated control system comprises a commercial power input end, a bidirectional inverter and a first sampling circuit which are connected sequentially, wherein a control module is connected between the bidirectional inverter and the first sampling circuit through a grid-connected inverter; an accumulator is connected between the control module and the bidirectional inverter; a solar cell array is connected to the grid-connected inverter; the control module is electrically connected with the first sampling circuit; a plurality of loads are connected between the control module and the output end of the first sampling circuit. The photovoltaic off-grid/grid-connection integrated control system can be used to implement power linear output of the bidirectional inverter and the grid-connected inverter, runs stably, enables application of power generated by the solar cell array to be more reasonable, thereby effectively prolonging the service life of the accumulator, saving energy and protecting environment better.
Description
Technical field
The present invention relates to energy power field, specifically a kind of photovoltaic is from grid-connected integral control system.
Background technology
The development in epoch at any time, distributed photovoltaic power generation project application raises the curtain, multiple solution has been proposed in industry subsequently, wherein photovoltaic gets more and more people's extensive concerning from grid-connected integral control system, in prior art, structure is mainly used two-way inverter as system control core from grid-connected integral control system, in load-side, add photovoltaic combining inverter to realize from grid-connected integrated, its working method is: in civil power normal power supply situation, two-way inverter and combining inverter are followed the electric energy of utility grid output same waveform, two-way inverter passes through charge inside control circuit to charge in batteries simultaneously, in the situation that civil power opens circuit, two-way inverter cut-out civil power is connected with internal electric network, by storage battery, pass through two-way inverter powering load, to combining inverter, provide reference power source simultaneously, two-way inverter makes combining inverter in work or holding state by the output frequency of adjusting self, for example, the output frequency of two-way inverter standard is 50Hz, when the voltage of storage battery is higher than the charging cycle voltage arranging, two-way inverter will be heightened output voltage frequency, thereby make combining inverter produce island protect effect, combining inverter is closed output, when battery tension is during lower than float charge voltage, frequency can be got back to initial value automatically, but the method for controlling combining inverter work by adjusting two-way inverter output frequency can only make combining inverter in work and holding state, can not make combining inverter reduce power output work, therefore during combining inverter and while work and standby, low when high during battery tension, not only affect the useful life of storage battery, and cause the waste of solar panel energy.
Summary of the invention
For above-mentioned weak point of the prior art, the present invention aims to provide a kind of photovoltaic that can realize accurate control combining inverter linear power output from grid-connected integral control system.
For solving the problems of the technologies described above, photovoltaic of the present invention is from grid-connected integral control system, it comprises mains electricity input end, two-way inverter and the first sample circuit connecting successively, between described two-way inverter and the first sample circuit, by a combining inverter, be connected with control module, between this control module and two-way inverter, be connected with storage battery, described combining inverter is connected with a solar cell array, between described control module and the first sample circuit electric connection and control module and the output of the first sample circuit, is also connected with several loads.
Concrete, between described mains electricity input end and two-way inverter, being also provided with the second sample circuit, this second sample circuit and control module are electrically connected.
Described control module comprises input terminal, amplifying circuit and the central processing unit connecting successively, and described central processing unit output is connected with several driver modules.
Described driver module is relay driving module, interface chip, and described relay driving module output is connected with the first binding post, and described interface chip output is connected with the second binding post.
Described amplifying circuit comprises the first operational amplifier and the second operational amplifier, input terminal port one is connected to the pin 1 of the first operational amplifier, the port 2 of input terminal is connected to the pin 1 of the second operational amplifier, input terminal port 3 is connected to one end of a resistance R 5, the other end of resistance R 5 is connected to the pin 3 of central processing unit, port 4 ground connection of input terminal; The pin 2 of the first operational amplifier is connected with one end of a resistance R 2, the equal ground connection of pin 3 of the other end of resistance R 2 and the first operational amplifier, the pin 5 of the first operational amplifier connects power supply, the pin 4 of the first operational amplifier is connected to one end of a resistance R 1, and the other end of R1 is received the pin 1 of central processing unit; The pin 2 of the second operational amplifier is connected with one end of a resistance R 6, the equal ground connection of pin 3 of the other end of resistance R 6 and the second operational amplifier, the pin 5 of the second operational amplifier connects power supply, the pin 4 of the second operational amplifier is connected to one end of a resistance R 4, the other end of R4 is received the pin 2 of central processing unit, the pin 3 of described central processing unit also connects one end of a resistance R 3, the other end ground connection of resistance R 3.
The pin 4 of described central processing unit is connected on the pin 4 of described interface chip, the pin 8 of central processing unit is connected on the pin 2 and pin 3 of interface chip, the pin 7 of central processing unit is connected to the pin 1 of interface chip, pin 5 ground connection of interface chip, the pin 6 of interface chip and pin 7 are received respectively port 2 and the port one of the second binding post, the pin 8 of interface chip connects power supply, between the pin 6 of interface chip and pin 7, be connected with a resistance R 8, one end of this resistance R 8 is connected to power supply by a resistance R 7, and the other end is by resistance R 9 ground connection.
The pin 5 of described central processing unit and pin 6 are connected respectively to port one and the port 2 of relay driving module, and the port 3 of this relay driving module, port 4, port 5, port 6 are connected respectively to interface 4, interface 3, interface 2, the interface 1 of described the first binding post.
Photovoltaic of the present invention has the following advantages from grid-connected integral control system:
The first, can control as required the power linear output of two-way inverter and combining inverter, the system of realization operates steadily, the electric energy application that solar cell array is produced is more reasonable, not only effectively extended the useful life of storage battery, and saved the energy, environmental protection more; The second, two-way inverter and the combining inverter of choose reasonable different manufacturers as required, need to not specify and select combining inverter according to two-way inverter producer, makes to build more flexible from grid-connected integral system; The 3rd, can be not very abundant in the situation that, progressively disconnect the load that priority level is lower at electric energy; The 4th, whether can select as required, to civil power feed, to meet the diversified system integration requirement of client.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is that photovoltaic of the present invention is from the structural representation of grid-connected integral control system the first execution mode;
Fig. 2 is that photovoltaic of the present invention is from the structural representation of grid-connected integral control system the second execution mode;
Fig. 3 is the internal structure schematic diagram of control module in Fig. 1 and Fig. 2.
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 clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The first execution mode of the present invention as shown in Figure 1, it comprises mains electricity input end 1, two-way inverter 2 and the first sample circuit 3 connecting successively, between described two-way inverter 2 and the first sample circuit 3, by a combining inverter 4, be connected with control module 5, between this control module 5 and two-way inverter 2, be connected with storage battery 6, described combining inverter 4 is connected with a solar cell array 7, between described control module 5 and the first sample circuit 3 electric connections and control module 5 and the output of the first sample circuit 3, is also connected with several loads.This kind of execution mode, can control as required the power linear output of two-way inverter and combining inverter, the system of realization operates steadily, the electric energy application that solar cell array is produced is more reasonable, not only effectively extended the useful life of storage battery, and the energy, more environmental protection have been saved; In addition, two-way inverter and the combining inverter of choose reasonable different manufacturers as required, need to not specify and select combining inverter according to two-way inverter producer, makes to build more flexible from grid-connected integral system.
The second execution mode of the present invention as shown in Figure 2, it comprises the mains electricity input end 1 connecting successively, two-way inverter 2 and the first sample circuit 3, between described two-way inverter 2 and the first sample circuit 3, by a combining inverter 4, be connected with control module 5, between this control module 5 and two-way inverter 2, be connected with storage battery 6, described combining inverter 4 is connected with a solar cell array 7, between described control module 5 and the first sample circuit 3 electric connections and control module 5 and the output of the first sample circuit 3, be also connected with several loads, between described mains electricity input end 1 and two-way inverter 2, be also provided with the second sample circuit 8, this second sample circuit 8 is electrically connected with control module 5.This kind of execution mode not only has advantages of in the first execution mode, but also has counterflow-preventing function.
As shown in Figure 3, described control module 5 comprises input terminal 51, amplifying circuit 52 and the central processing unit 53 connecting successively to control module 5 internal structures, and described central processing unit 53 outputs are connected with several driver modules, described driver module is relay driving module 54, interface chip 55, and described relay driving module 54 outputs are connected with the first binding post 56, and described interface chip 55 outputs are connected with the second binding post 57, described amplifying circuit 52 comprises the first operational amplifier and the second operational amplifier, input terminal 51 port ones are connected to the pin 1 of the first operational amplifier, the port 2 of input terminal 51 is connected to the pin 1 of the second operational amplifier, input terminal 51 ports 3 are connected to one end of a resistance R 5, the other end of resistance R 5 is connected to the pin 3 of central processing unit 53, port 4 ground connection of input terminal 51, the pin 2 of the first operational amplifier is connected with one end of a resistance R 2, the equal ground connection of pin 3 of the other end of resistance R 2 and the first operational amplifier, the pin 5 of the first operational amplifier connects power supply, the pin 4 of the first operational amplifier is connected to one end of a resistance R 1, and the other end of R1 is received the pin 1 of central processing unit 53, the pin 2 of the second operational amplifier is connected with one end of a resistance R 6, the equal ground connection of pin 3 of the other end of resistance R 6 and the second operational amplifier, the pin 5 of the second operational amplifier connects power supply, the pin 4 of the second operational amplifier is connected to one end of a resistance R 4, the other end of R4 is received the pin 2 of central processing unit 53, the pin 3 of described central processing unit 53 also connects one end of a resistance R 3, the other end ground connection of resistance R 3, the pin 4 of described central processing unit 53 is connected on the pin 4 of described interface chip 55, the pin 8 of central processing unit 53 is connected on the pin 2 and pin 3 of interface chip 55, the pin 7 of central processing unit 53 is connected to the pin 1 of interface chip 55, pin 5 ground connection of interface chip 55, the pin 6 of interface chip 55 and pin 7 are received respectively port 2 and the port one of the second binding post 57, the pin 8 of interface chip 55 connects power supply, between the pin 6 of interface chip 55 and pin 7, be connected with a resistance R 8, one end of this resistance R 8 is connected to power supply by a resistance R 7, the other end is by resistance R 9 ground connection, the pin 5 of described central processing unit 53 and pin 6 are connected respectively to port one and the port 2 of relay driving module 54, and the port 3 of this relay driving module 54, port 4, port 5, port 6 are connected respectively to interface 4, interface 3, interface 2, the interface 1 of described the first binding post 56.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. a photovoltaic is from grid-connected integral control system, it is characterized in that: comprise the mains electricity input end (1) connecting successively, two-way inverter (2) and the first sample circuit (3), between described two-way inverter (2) and the first sample circuit (3), by a combining inverter (4), be connected with control module (5), between this control module (5) and two-way inverter (2), be connected with storage battery (6), described combining inverter (4) is connected with a solar cell array (7), between described control module (5) and the first sample circuit (3) electric connection and control module (5) and the output of the first sample circuit (3), be also connected with several loads.
2. photovoltaic according to claim 1 is from grid-connected integral control system, it is characterized in that: between described mains electricity input end (1) and two-way inverter (2), be also provided with the second sample circuit (8), this second sample circuit (8) is electrically connected with control module (5).
3. photovoltaic according to claim 1 and 2 is from grid-connected integral control system, it is characterized in that: described control module (5) comprises input terminal (51), amplifying circuit (52) and the central processing unit (53) connecting successively, and described central processing unit (53) output is connected with several driver modules.
4. photovoltaic according to claim 3 is from grid-connected integral control system, it is characterized in that: described driver module is relay driving module (54), interface chip (55), described relay driving module (54) output is connected with the first binding post (56), and described interface chip (55) output is connected with the second binding post (57).
5. photovoltaic according to claim 4 is from grid-connected integral control system, it is characterized in that: described amplifying circuit (52) comprises the first operational amplifier and the second operational amplifier, input terminal (51) port one is connected to the pin 1 of the first operational amplifier, the port 2 of input terminal (51) is connected to the pin 1 of the second operational amplifier, input terminal (51) port 3 is connected to one end of a resistance R 5, the other end of resistance R 5 is connected to the pin 3 of central processing unit (53), port 4 ground connection of input terminal (51); The pin 2 of the first operational amplifier is connected with one end of a resistance R 2, the equal ground connection of pin 3 of the other end of resistance R 2 and the first operational amplifier, the pin 5 of the first operational amplifier connects power supply, the pin 4 of the first operational amplifier is connected to one end of a resistance R 1, and the other end of R1 is received the pin 1 of central processing unit (53); The pin 2 of the second operational amplifier is connected with one end of a resistance R 6, the equal ground connection of pin 3 of the other end of resistance R 6 and the second operational amplifier, the pin 5 of the second operational amplifier connects power supply, the pin 4 of the second operational amplifier is connected to one end of a resistance R 4, the other end of R4 is received the pin 2 of central processing unit (53), the pin 3 of described central processing unit (53) also connects one end of a resistance R 3, the other end ground connection of resistance R 3.
6. photovoltaic according to claim 5 is from grid-connected integral control system, it is characterized in that: the pin 4 of described central processing unit (53) is connected on the pin 4 of described interface chip (55), the pin 8 of central processing unit (53) is connected on the pin 2 and pin 3 of interface chip (55), the pin 7 of central processing unit (53) is connected to the pin 1 of interface chip (55), pin 5 ground connection of interface chip (55), the pin 6 of interface chip (55) and pin 7 are received respectively port 2 and the port one of the second binding post (57), the pin 8 of interface chip (55) connects power supply, between the pin 6 of interface chip (55) and pin 7, be connected with a resistance R 8, one end of this resistance R 8 is connected to power supply by a resistance R 7, the other end is by resistance R 9 ground connection.
7. photovoltaic according to claim 6 is from grid-connected integral control system, it is characterized in that: the pin 5 of described central processing unit (53) and pin 6 are connected respectively to port one and the port 2 of relay driving module (54), the port 3 of this relay driving module (54), port 4, port 5, port 6 are connected respectively to interface 4, interface 3, interface 2, the interface 1 of described the first binding post (56).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410047777.3A CN103746405A (en) | 2014-02-06 | 2014-02-06 | Photovoltaic off-grid/grid-connection integrated control system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410047777.3A CN103746405A (en) | 2014-02-06 | 2014-02-06 | Photovoltaic off-grid/grid-connection integrated control system |
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| CN103746405A true CN103746405A (en) | 2014-04-23 |
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| CN201410047777.3A Pending CN103746405A (en) | 2014-02-06 | 2014-02-06 | Photovoltaic off-grid/grid-connection integrated control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110445169A (en) * | 2019-07-13 | 2019-11-12 | 深圳市禾望科技有限公司 | From grid-connected photovoltaic energy-storage system and its control method |
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| CN102545257A (en) * | 2012-01-12 | 2012-07-04 | 广东中商国通电子有限公司 | Solar photovoltaic generating single-phase grid-connected inverter and control method thereof |
| CN102882237A (en) * | 2011-07-15 | 2013-01-16 | 珠海银通新能源有限公司 | Intelligent energy storage machine and operating method thereof |
| CN202696178U (en) * | 2012-07-31 | 2013-01-23 | 周锡卫 | Photovoltaic electric grid-connected and off-grid integration device |
| CN203690943U (en) * | 2014-02-06 | 2014-07-02 | 云南万富行节能有限公司 | Photovoltaic off-grid/grid-connection integrated control system |
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2014
- 2014-02-06 CN CN201410047777.3A patent/CN103746405A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102882237A (en) * | 2011-07-15 | 2013-01-16 | 珠海银通新能源有限公司 | Intelligent energy storage machine and operating method thereof |
| CN102545257A (en) * | 2012-01-12 | 2012-07-04 | 广东中商国通电子有限公司 | Solar photovoltaic generating single-phase grid-connected inverter and control method thereof |
| CN202696178U (en) * | 2012-07-31 | 2013-01-23 | 周锡卫 | Photovoltaic electric grid-connected and off-grid integration device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110445169A (en) * | 2019-07-13 | 2019-11-12 | 深圳市禾望科技有限公司 | From grid-connected photovoltaic energy-storage system and its control method |
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