CN102931676B - Structure of solar power grid-connected self-use multifunctional system - Google Patents
Structure of solar power grid-connected self-use multifunctional system Download PDFInfo
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- CN102931676B CN102931676B CN201110228464.4A CN201110228464A CN102931676B CN 102931676 B CN102931676 B CN 102931676B CN 201110228464 A CN201110228464 A CN 201110228464A CN 102931676 B CN102931676 B CN 102931676B
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Abstract
The invention belongs to the technical field of solar power generation and grid-connected self-use power supply application, and particularly relates to a structure and a method of a solar power grid-connected self-use multifunctional system. In order to enable the solar power generation system to be capable of generating power, grid connection and self-use, the technical scheme that the system structure and the single internal power path can be completed only through a storage battery and an inverter when the solar power generation system supplies power for alternating current loads of users is changed through a direct current power regulating circuit, a system allocation control circuit, an electric control switch group and a power on-off controller, so that when the multipurpose solar power generation power supply system which enables the solar power generation system to be capable of generating power, grid connection and self-use is constructed, the system hardware scale is reduced, the structure of the system and the construction mode of the internal power path are optimized, power loss and resource waste are reduced, the use efficiency of solar power is greatly improved, and investment return is greatly increased.
Description
Technical field
The invention belongs to solar power generation and grid-connected personal power applications technical field, be specifically related to the structure of the grid-connected personal multifunction system of a kind of solar electric power.
Background technology
National governments encourage the attention of new forms of energy and policy, and the town dweller that electrical network is covered, under revenue-generating business pattern, adds the main forces that electricity power supply sold by solar power generation, and especially in Europe, this mode obtains fast development and popularizes.Current, the prior art products of solar energy and wind power generation, generally adopts to generate electricity by way of merging two or more grid systems and sells electric mode to mains supply.It has two main causes, and one is government subsidy policy, lucrative; Two is that technology is simple, direct grid-connected, and the electric power of unstable generating is diluted by electrical network, does not need electric power storage link, invests less, but the burden of government and increasing pressure large, so mostly take to give subsidy and preferential by period or the mode of successively decreasing year by year.
Along with the margin of preference reduces year by year, the quantity of electricity generation grid-connecting increases simultaneously, electrical network pressure and burden also constantly increase, add that electricity generation grid-connecting uses to power transformation to user, also to transmit electricity huge with the electric power resource waste of secondary power transformation overall process, reach unanimity especially by the constantly exploration of practice and the conclusion of large quantity research, to be exactly the best supply power mode of solar electric power be is adjusted to target with locally personal and remaining electricity.Therefore, little by little generate electricity by way of merging two or more grid systems encouraging to encouraging the direction transfer that electricity is grid-connected more than non-utility power generation in Europe, a large amount of grid-connected systems will increase the ability of personal power supply.
Due to grid-connected solar electric power be the direct inversion of unstable electric power that directly utilizes sun the subject of knowledge and the object of knowledge to send out and power supply to electrical network, be unstable equally, so can not use directly to user load.In order to make solar power system can not only electricity generation grid-connecting, can use by oneself again, current major way utilizes existing solar power generation grid-connecting system and off-grid system simply to integrate.Therefore, not only need the main device of two cover solar power generation inversion systems, also to increase by two cover systems integrate needed for connection switching and charge and discharge device and system control device, system construction is made to be subject to the restriction of each self-structuring of two cover systems, system is planned as a whole ability of regulation and control and is greatly affected, and system investments scale increases, and operational efficiency reduces, system energy consumption increases, and investment return reduces.The representative of the application number announced as Chinese invention patent to be the patent of invention of 200810200725.X by name " a kind of multipurpose solar energy power generating system " be exactly typical system construction and scheme.
Known, make solar power system can not only electricity generation grid-connecting, the system can used by oneself again, its prior art and method, mainly utilize existing grid-connected and carry out combination from the existing structure of net two kinds of systems and function and form, its feature be exactly have power supply for user's AC load, all will by storage battery and inverter, namely on the basis keeping solar power generation grid-connecting system grid connection structure, obtain solar electric power and carry out electric power storage, namely be the mode of storage battery electric power storage by charger, unstable electric power is first stored, there is used by storage battery and inverter supply user after corresponding electricity again, thus, unstable solar electric power is made to become galvanic current, load need for electricity is met through carrying out electric power conversion for the inverter of customer power supply, system needs to increase MPPT and DC/DC module, aptitude chargeable circuit, boosting DC/DC circuit, and user class inverter circuit and associated regulatory circuit, when if be in operation, electrical network is normal, and when generation deficiency, the system construction of prior art and electrical path need grid power to be power to AC load after charge in batteries by AC/DC change-over circuit and intelligent charger again, and need, through powering again after the conversion of net inverter, to consume electric power resource and device resource in a large number.As mentioned above, the solar energy customer power supply system construction of prior art and electrical path design, not only waste resource in a large number and add investment, also add link and the consume of power converter, reduce the power supplying efficiency of system.
In order to overcome the defect of prior art, the present invention proposes the structure of the grid-connected personal multifunction system of a kind of solar electric power, change when powering for user's AC load, all will by storage battery and the system construction of inverter and the defect in single internal power path, thus make structure make solar power system can not only electricity generation grid-connecting, can use by oneself again multipurpose solar electricity generating and supplying system time, system hardware scale can be reduced, reduce investment outlay, improve running efficiency of system, reduce system energy consumption, increase investment return.
Summary of the invention
Grid-connected and the personal electric power system of solar electric power existed to solve prior art and product under existence conditions constructs and the system defect of electrical path, reduce system hardware scale, reduce investment outlay, improve running efficiency of system, reduce system energy consumption, increase investment return, and then realize the object improving investment repayment, for this reason, the present invention proposes the structure of the grid-connected personal multifunction system of a kind of solar electric power, comprise solar power generation assembly, MPPT and DC/DC circuit, direct current power regulating circuit, DC/AC inverter circuit, charge and discharge control management circuit, system allotment control circuit, batteries, circuit for detecting island, electric-controlled switch group, AC/DC change-over circuit, user's AC load, user's DC load, system bus, networking protection metering circuit, load protection and monitoring and metering circuit, electrical network input ammeter, electric power on-off controller a, electric power on-off controller b, electric power on-off controller c, electric power on-off controller d and electric power on-off controller e and electrical network, it is characterized in that solar power generation assembly is connected direct current power regulating circuit by MPPT and DC/DC circuit and connect user's AC load through DC/AC inverter circuit, load protection and monitoring and metering circuit and electric power on-off controller b and form the Alternating Current Power Supply path that generates electricity, be connected electrical network by circuit for detecting island and electric power on-off controller c with networking protection metering circuit by DC/AC inverter circuit simultaneously, form electricity generation grid-connecting path, solar power generation assembly also connects charge and discharge control management circuit by MPPT and DC/DC circuit and is connected with batteries through electric-controlled switch group, forms charge path, batteries connects direct current power regulating circuit through electric-controlled switch group, charge and discharge control management circuit and is connected user AC load through electric power on-off controller b and load protection with monitoring and metering circuit by DC/AC inverter circuit, forms electric power storage Alternating Current Power Supply path, batteries also connects user's DC load through electric-controlled switch group, direct current power regulating circuit and electric power on-off controller e, forms electric power storage direct current supply path, electrical network, by electrical network input ammeter and electric power on-off controller a, AC/DC change-over circuit, direct current power regulating circuit, charge and discharge control management circuit, electric-controlled switch group connection batteries, forms the charge path of grid power, electrical network is also connected with user's AC load through electric power on-off controller d, forms grid power to the supply path of load, system allotment control circuit protects metering circuit, load protection and monitoring and metering circuit and electric power on-off controller a, electric power on-off controller b by system bus and MPPT and DC/DC circuit, direct current power regulating circuit, the control and management circuit that charge, electric-controlled switch group, circuit for detecting island, networking, electric power on-off controller d, electric power on-off controller e are connected, formation system regulation path, and circuit for detecting island connects electrical network by electric power on-off controller c and networking protection metering circuit.
The structure of the grid-connected personal multifunction system of a kind of solar electric power of the present invention, it is characterized in that being provided with power monitoring dispensable circuit in direct current power regulating circuit, Low threshold switch and high-threshold switch, and be connected with charge and discharge control management circuit and electric-controlled switch group respectively, wherein power monitoring dispensable circuit and Low threshold switch, high-threshold switch and MPPT and DC/DC circuit, DC/AC inverter circuit, AC/DC change-over circuit, electric power on-off controller e connects, when solar power generation assembly is greater than upper limit set value or loading demand value through the electric power that MPPT and DC/DC circuit inputs, direct current power regulating circuit is exported through the electric power storage of charge and discharge control management circuit accumulators group by high-threshold switch allotment, when being less than the lower limit of setting, allotment batteries is connected with MPPT and DC/DC circuit power output through electric-controlled switch group and Low threshold switch, carry out supplementary power by battery power, the electric power that solar power generation assembly and batteries are exported after the allotment of direct current power regulating circuit meets user's DC load) or the demand of user's AC load.
The structure of the grid-connected personal multifunction system of a kind of solar electric power of the present invention, it is characterized in that being provided with embedded microprocessor in system allotment control circuit, data memory module and program storage block preset electric power allotment priority orders data and regulatory process, the power condition that the electric power of its need for electricity arrived according to load protection and monitoring and metering circuit monitoring and setting allocates priority orders and solar power generation assembly and batteries performs corresponding program, by controlling electric power on-off controller a, electric power on-off controller b, electric power on-off controller c and electric power on-off controller d, the break-make of electric power on-off controller e and electric-controlled switch group makes corresponding electrical path be in and switches on or off state accordingly, complete and control and regulate electrical path, also dynamically send the upper and lower limit threshold data of electric power input to direct current power regulating circuit simultaneously, its allotment priority orders is solar power generation assembly, batteries, electrical network at a low price electric power and electrical network high price electric power, and battery power to carry out supplementary power be automatically carry out on-off valve regulation by the Low threshold switch in direct current power regulating circuit.
The structure of the grid-connected personal multifunction system of a kind of solar electric power of the present invention, it is characterized in that direct current power regulating circuit has the three road power input end mouths connecting solar power generation assembly and batteries and AC/DC change-over circuit, and have connection DC/AC inverter circuit respectively, electric-controlled switch group and connection electric power on-off controller e are to user's DC load and three the power output end mouths being connected charge and discharge control management circuit, its power regulating method is when the input of solar power generation assembly meets loading demand, if still have a surplus after supply load during electricity, the electric power of surplus power is regulated to charge and discharge control management circuit to batteries electric power storage by high-threshold switch, when solar power generation assembly input electric power can not meet loading demand, supply user's AC load through DC/AC inverter circuit, load protection and monitoring and metering circuit and electric power on-off controller b in real time by Low threshold switch-mode regulation batteries or supply user's DC load through electric power on-off controller e, meeting the need for electricity of user load with this, when batteries can not meet load need for electricity, direct current power regulating circuit and reporting system allotment control circuit, allocate control circuit control electric power on-off controller d connection electrical network by system and transfer mains supply to, at electrical network low ebb rate period, be also batteries electric power storage by controlling electric power on-off controller a.
The structure of the grid-connected personal multifunction system of a kind of solar electric power of the present invention, it is characterized in that unitary battery is divided into more than three groups by batteries, each group storage battery group is connected with electric-controlled switch group respectively, and each group storage battery group is operated in charging, electric discharge respectively, prepares one of three kinds of operating states, system allotment control circuit is according to the operating state of the corresponding charge capacity adjustment batteries of batteries.
In sum, the present invention proposes the structure of the grid-connected personal multifunction system of a kind of solar electric power, change solar power system when powering for user's AC load, the system construction that all just can will be completed by storage battery and inverter and the system construction in single internal power path and technical scheme, thus make to make solar power system can not only electricity generation grid-connecting at structure, during the multipurpose solar electricity generating and supplying system can used by oneself again, decrease system hardware scale, optimize the structure of system and the system construction in internal power path and constituted mode, decrease power loss and the wasting of resources, greatly improve the service efficiency of solar electric power, considerably increase investment repayment.
Accompanying drawing explanation
Fig. 1 is prior art solar power generation grid-connecting system principle schematic block diagram;
Fig. 2 is that prior art solar power generation is from net electric power system schematic block diagram;
Fig. 3 is the structure schematic block diagram of prior art solar power generation grid-connecting and personal multipurpose system;
Fig. 4 is the structure schematic block diagram of the grid-connected personal multifunction system of solar electric power of the present invention;
Fig. 5 is direct current power regulating circuit principle of work and power schematic block diagram.
Embodiment
As examples of implementation, by reference to the accompanying drawings the structure of the grid-connected personal multifunction system of a kind of solar electric power is described, but technology of the present invention and scheme are not limited to the content that the present embodiment provides.
Specific embodiment of the invention accompanying drawings is as follows, and classical prior art solar power generation grid-connecting system principle schematic block diagram as shown in Figure 1.
As shown in Figure 2, for prior art solar power generation is from net electric power system schematic block diagram.
The solar power generation grid-connecting of prior art and the structure schematic block diagram of personal multipurpose system are as shown in Figure 3, be characterized in utilizing prior art solar power generation grid-connecting system and prior art solar power generation to increase MPPT charger from net electric power system, re-construct and integrate after switch controller and system regulation device and intelligent charger and DC/DC change-over circuit and form, system composition is fairly simple, but, this system not only needs two cover solar power generation inversion systems, also to increase by two cover systems integrate needed for connection switching and charge-discharge circuit and system control device, system construction is made to be subject to the restriction of each self-structuring of two cover systems, system is planned as a whole ability of regulation and control and is greatly affected, and system investments scale increases, operational efficiency reduces, system energy consumption increases, investment return reduces.
As shown in Figure 4, the structure of the grid-connected personal multifunction system of a kind of solar electric power of the present invention, comprise solar power generation assembly (1), MPPT and DC/DC circuit (2), direct current power regulating circuit (3), DC/AC inverter circuit (4), charge and discharge control management circuit (5), system allotment control circuit (6), batteries (7), circuit for detecting island (8), electric-controlled switch group (9), AC/DC change-over circuit (10), user's AC load (11), user's DC load (12), system bus (13), networking protection metering circuit (14), load protection and monitoring and metering circuit (15), electrical network input ammeter (16), electric power on-off controller a (101), electric power on-off controller b (102), electric power on-off controller c (103), electric power on-off controller d (104) and electric power on-off controller e (105) and electrical network, it is characterized in that solar power generation assembly (1) is connected direct current power regulating circuit (3) by MPPT and DC/DC circuit (2) and connect user's AC load (11) through DC/AC inverter circuit (4), load protection and monitoring and metering circuit (15) and electric power on-off controller b (102) and form the Alternating Current Power Supply path that generates electricity, be connected electrical network by circuit for detecting island (8) and electric power on-off controller c (103) with networking protection metering circuit (14) by DC/AC inverter circuit (4) simultaneously and form electricity generation grid-connecting path, solar power generation assembly (1) also connects charge and discharge control management circuit (5) by MPPT and DC/DC circuit (2) and to be connected with batteries (7) through electric-controlled switch group (9) and forms charge path, batteries (7) connects direct current power regulating circuit (3) through electric-controlled switch group (9), charge and discharge control management circuit (5) and is connected user's AC load (11) through electric power on-off controller b (102) and load protection with monitoring and metering circuit (15) is formed electric power storage Alternating Current Power Supply path by DC/AC inverter circuit (4), batteries (7) also connects user's DC load (12) through electric-controlled switch group (9), direct current power regulating circuit (3) and electric power on-off controller e (105) and forms electric power storage direct current supply path, electrical network inputs ammeter (16) and electric power on-off controller a (101) by electrical network, AC/DC change-over circuit (10), direct current power regulating circuit (3), charge and discharge control management circuit (5), electric-controlled switch group (9) connect the charge path that batteries (7) forms grid power, electrical network is also connected with user's AC load (11) through electric power on-off controller d (104), forms grid power to the supply path of load, system allotment control circuit (6) by system bus (13) and MPPT and DC/DC circuit (2), direct current power regulating circuit (3), the control and management circuit (5) that charges, electric-controlled switch group (9), circuit for detecting island (8), network protect metering circuit (14), load protection and monitoring and metering circuit (15) and electric power on-off controller a (101), electric power on-off controller b (102), electric power on-off controller d (104), electric power on-off controller e (105) be connected, formation control path, and circuit for detecting island (8) connects electrical network by electric power on-off controller c (103) and networking protection metering circuit (14).
As shown in Figure 5, the structure of the grid-connected personal multifunction system of a kind of solar electric power of the present invention, it is characterized in that being provided with power monitoring dispensable circuit (31) in direct current power regulating circuit (3), Low threshold switch (32) and high-threshold switch (33), and be connected with charge and discharge control management circuit (5) and electric-controlled switch group (9) respectively, wherein power monitoring dispensable circuit (31) and Low threshold switch (32), high-threshold switch (33) and MPPT and DC/DC circuit (2), DC/AC inverter circuit (4), AC/DC change-over circuit (10), electric power on-off controller e (105) connects, when solar power generation assembly (1) is greater than upper limit set value or loading demand value through the electric power that MPPT and DC/DC circuit (2) inputs, direct current power regulating circuit (3) is exported through charge and discharge control management circuit (5) accumulators group (7) electric power storage by high-threshold switch (33) allotment, when being less than the lower limit of setting, allotment batteries (7) is connected with MPPT and DC/DC circuit (2) power output end through electric-controlled switch group (9) and Low threshold switch (32), carry out supplementary power by battery power, the electric power that solar power generation assembly (1) and batteries (7) are exported after direct current power regulating circuit (3) allotment meets the demand of user's DC load (12) or user's AC load (11).
The structure of the grid-connected personal multifunction system of a kind of solar electric power of the present invention, it is characterized in that being provided with embedded microprocessor in system allotment control circuit (6) and the software module of preset electric power allotment priority orders data and regulatory process, the power condition that the electric power of its need for electricity monitored according to load protection and monitoring and metering circuit (15) and setting allocates priority orders and solar power generation assembly (1) and batteries (7) performs corresponding program, by controlling electric power on-off controller a (101), electric power on-off controller b (102), electric power on-off controller c (103) and electric power on-off controller d (104), the break-make of electric power on-off controller e (105) and electric-controlled switch group (9) makes corresponding electrical path be in and switches on or off state accordingly, complete and control and regulate electrical path, also dynamically send the upper and lower limit threshold data of electric power input to direct current power regulating circuit (3) simultaneously, its allotment priority orders is solar power generation assembly (1), batteries (7), electrical network at a low price electric power and electrical network high price electric power, and battery power to carry out supplementary power be automatically carry out on-off valve regulation by the Low threshold switch (32) in direct current power regulating circuit (3).
The structure of the grid-connected personal multifunction system of a kind of solar electric power of the present invention, it is characterized in that being provided with power monitoring dispensable circuit (31) in direct current power regulating circuit (3), Low threshold switch (32) and high-threshold switch (33), there is solar power generation assembly (1) and batteries (7) and AC/DC change-over circuit (10) three road power input end mouth, and have connection DC/AC inverter circuit (4) respectively, electric-controlled switch group (9) and connection electric power on-off controller e (105) are to user's DC load (12) and three the power output end mouths being connected charge and discharge control management circuit (5), its power regulating method is when solar power generation assembly (1) input meets loading demand, if still have a surplus after supply load during electricity, the electric power of surplus power is regulated to charge and discharge control management circuit (5) to batteries (7) electric power storage by high-threshold switch (33), when solar power generation assembly (1) input electric power can not meet loading demand, regulate batteries (7) supply user's AC load (11) through DC/AC inverter circuit (4), load protection and monitoring and metering circuit (15) and electric power on-off controller b (102) in real time or supply user's DC load (12) through electric power on-off controller e (105) by Low threshold switch (32), meet the need for electricity of user load with this, when batteries (7) can not meet load need for electricity, direct current power regulating circuit (3) is i.e. reporting system allotment control circuit (6), allocates control circuit (6) control electric power on-off controller d (104) connection electrical network transfer mains supply to by system, at electrical network low ebb rate period, also by control electric power on-off controller a (101) be batteries (7) electric power storage.
The structure of the grid-connected personal multifunction system of a kind of solar electric power of the present invention, it is characterized in that unitary battery is divided into more than three groups by batteries (7), each group storage battery group is connected with electric-controlled switch group (9) respectively, and each group storage battery group is operated in charging, electric discharge respectively, prepares one of three kinds of operating states, system allotment control circuit (6) is according to the operating state of the corresponding charge capacity adjustment batteries of batteries.
The structure of the grid-connected personal multifunction system of a kind of solar electric power of the present invention, in order to make solar power system can not only electricity generation grid-connecting, can use by oneself again, by direct current power regulating circuit and system allotment control circuit and electric-controlled switch group and electric power on-off controller, change solar power system when powering for user's AC load, the system construction that all just can will be completed by storage battery and inverter and the technical scheme in single internal power path, thus make to make solar power system can not only electricity generation grid-connecting at structure, during the multipurpose solar electricity generating and supplying system can used by oneself again, decrease system hardware scale, optimize the structure of system and the constituted mode in adjustable internal power path, decrease power loss and the wasting of resources, greatly improve the service efficiency of solar electric power, considerably increase investment repayment.
Claims (5)
1. the structure of the grid-connected personal multifunction system of solar electric power, comprise solar power generation assembly (1), MPPT and DC/DC circuit (2), direct current power regulating circuit (3), DC/AC inverter circuit (4), charge and discharge control management circuit (5), system allotment control circuit (6), batteries (7), circuit for detecting island (8), electric-controlled switch group (9), AC/DC change-over circuit (10), user's AC load (11), user's DC load (12), system bus (13), networking protection metering circuit (14), load protection and monitoring and metering circuit (15), electrical network input ammeter (16), electric power on-off controller a (101), electric power on-off controller b (102), electric power on-off controller c (103), electric power on-off controller d (104) and electric power on-off controller e (105) and electrical network, it is characterized in that solar power generation assembly (1) is connected direct current power regulating circuit (3) by MPPT and DC/DC circuit (2) and connect user's AC load (11) through DC/AC inverter circuit (4), load protection and monitoring and metering circuit (15) and electric power on-off controller b (102) and form the Alternating Current Power Supply path that generates electricity, be connected electrical network by circuit for detecting island (8) and electric power on-off controller c (103) with networking protection metering circuit (14) by DC/AC inverter circuit (4) simultaneously and form electricity generation grid-connecting path, solar power generation assembly (1) also connects charge and discharge control management circuit (5) by MPPT and DC/DC circuit (2) and to be connected with batteries (7) through electric-controlled switch group (9) and forms charge path, batteries (7) connects direct current power regulating circuit (3) through electric-controlled switch group (9), charge and discharge control management circuit (5) and is connected user's AC load (11) through electric power on-off controller b (102) and load protection with monitoring and metering circuit (15) is formed electric power storage Alternating Current Power Supply path by DC/AC inverter circuit (4), batteries (7) also connects user's DC load (12) through electric-controlled switch group (9), direct current power regulating circuit (3) and electric power on-off controller e (105) and forms electric power storage direct current supply path, electrical network inputs ammeter (16) and electric power on-off controller a (101) by electrical network, AC/DC change-over circuit (10), direct current power regulating circuit (3), charge and discharge control management circuit (5), electric-controlled switch group (9) connect the charge path that batteries (7) forms grid power, electrical network is also connected with user's AC load (11) through electric power on-off controller d (104), forms grid power to the supply path of load, system allotment control circuit (6) by system bus (13) and MPPT and DC/DC circuit (2), direct current power regulating circuit (3), the control and management circuit (5) that charges, electric-controlled switch group (9), circuit for detecting island (8), network protect metering circuit (14), load protection and monitoring and metering circuit (15) and electric power on-off controller a (101), electric power on-off controller b (102), electric power on-off controller d (104), electric power on-off controller e (105) be connected, formation control path, and circuit for detecting island (8) connects electrical network by electric power on-off controller c (103) and networking protection metering circuit (14).
2. the structure of the grid-connected personal multifunction system of a kind of solar electric power according to claim 1, it is characterized in that being provided with power monitoring dispensable circuit (31) in direct current power regulating circuit (3), Low threshold switch (32) and high-threshold switch (33), and be connected with charge and discharge control management circuit (5) and electric-controlled switch group (9) respectively, wherein power monitoring dispensable circuit (31) and Low threshold switch (32), high-threshold switch (33) and MPPT and DC/DC circuit (2), DC/AC inverter circuit (4), AC/DC change-over circuit (10), electric power on-off controller e (105) connects, when solar power generation assembly (1) is greater than upper limit set value or loading demand value through the electric power that MPPT and DC/DC circuit (2) inputs, direct current power regulating circuit (3) is exported through charge and discharge control management circuit (5) accumulators group (7) electric power storage by high-threshold switch (33) allotment, when being less than the lower limit of setting, allotment batteries (7) is connected with MPPT and DC/DC circuit (2) power output end through electric-controlled switch group (9) and Low threshold switch (32), carry out supplementary power by battery power, the electric power that solar power generation assembly (1) and batteries (7) are exported after direct current power regulating circuit (3) allotment meets the demand of user's DC load (12) or user's AC load (11).
3. the structure of the grid-connected personal multifunction system of a kind of solar electric power according to claim 1, it is characterized in that being provided with embedded microprocessor in system allotment control circuit (6), data memory module and program storage block preset electric power allotment priority orders data and regulatory process, the power condition that the electric power of its need for electricity monitored according to load protection and monitoring and metering circuit (15) and setting allocates priority orders and solar power generation assembly (1) and batteries (7) performs corresponding program, by controlling electric power on-off controller a (101), electric power on-off controller b (102), electric power on-off controller c (103) and electric power on-off controller d (104), the break-make of electric power on-off controller e (105) and electric-controlled switch group (9) makes corresponding electrical path be in and switches on or off state accordingly, complete and control and regulate electrical path, also dynamically send the upper and lower limit threshold data of electric power input to direct current power regulating circuit (3) simultaneously, its allotment priority orders is solar power generation assembly (1), batteries (7), electrical network at a low price electric power and electrical network high price electric power, and battery power to carry out supplementary power be automatically carry out on-off valve regulation by the Low threshold switch (32) in direct current power regulating circuit (3).
4. the structure of the grid-connected personal multifunction system of a kind of solar electric power according to claim 1, it is characterized in that direct current power regulating circuit (3) has solar power generation assembly (1) and batteries (7) and AC/DC change-over circuit (10) three road power input end mouth, and have connection DC/AC inverter circuit (4) respectively, electric-controlled switch group (9) and connection electric power on-off controller e (105) are to user's DC load (12) and three the power output end mouths being connected charge and discharge control management circuit (5), its power regulating method is when solar power generation assembly (1) input meets loading demand, if still have a surplus after supply load during electricity, the electric power of surplus power is regulated to charge and discharge control management circuit (5) to batteries (7) electric power storage by high-threshold switch (33), when solar power generation assembly (1) input electric power can not meet loading demand, regulate batteries (7) supply user's AC load (11) through DC/AC inverter circuit (4), load protection and monitoring and metering circuit (15) and electric power on-off controller b (102) in real time or supply user's DC load (12) through electric power on-off controller e (105) by Low threshold switch (32), meet the need for electricity of user load with this, when batteries (7) can not meet load need for electricity, direct current power regulating circuit (3) is i.e. reporting system allotment control circuit (6), allocates control circuit (6) control electric power on-off controller d (104) connection electrical network transfer mains supply to by system, at electrical network low ebb rate period, also by control electric power on-off controller a (101) be batteries (7) electric power storage.
5. the structure of the grid-connected personal multifunction system of a kind of solar electric power according to claim 1, it is characterized in that unitary battery is divided into more than three groups by batteries (7), each group storage battery group is connected with electric-controlled switch group (9) respectively, and each group storage battery group is operated in charging, electric discharge respectively, prepares one of three kinds of operating states, system allotment control circuit (6) is according to the operating state of the corresponding charge capacity adjustment batteries of batteries.
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| CN103915856B (en) * | 2014-04-17 | 2016-07-20 | 中南大学 | A kind of base station is grid-connected-charging photovoltaic micro-inverter system and control method thereof |
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