CN202134924U - Structure of multifunctional system of solar power and self use connected grid - Google Patents
Structure of multifunctional system of solar power and self use connected grid Download PDFInfo
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- CN202134924U CN202134924U CN 201120289456 CN201120289456U CN202134924U CN 202134924 U CN202134924 U CN 202134924U CN 201120289456 CN201120289456 CN 201120289456 CN 201120289456 U CN201120289456 U CN 201120289456U CN 202134924 U CN202134924 U CN 202134924U
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Abstract
The utility model belongs to the technical field of power supply application of solar power generation and self use connected grid, and particularly relates to a structure of a multifunctional system of solar power and self use connected grid. For a solar power system capable of connected grid power generation and self use, through a dc electric power adjusting circuit, a system blending control circuit, an electric control switch block, and an electric power connection and disconnection controller, the technical scheme that when the solar power system supplies power for ac load of a user, the system structure and an internal electric power path can be completed through a storage battery and an inverter is changed. Thus when a multifunctional solar energy generation and power supply system capable of connected grid power generation and self use of a solar energy power generation system is constructed, hardware scale of the system is reduced; the construction of the system and forming mode of the internal electric power path are optimized; electric power loss and resource waste are reduced; the usage efficiency of the electric power is greatly increased; and return of investment is substantially increased.
Description
Technical field
The utility model belongs to the solar power generation and the personal power applications technical field that is incorporated into the power networks, and is specifically related to the be incorporated into the power networks structure of personal multifunction system of a kind of solar electric power.
Background technology
National governments encourage the attention and the policy of new forms of energy, and the town dweller who makes the electrical network covering has added solar power generation and sold the main forces that electricity is supplied power under the profit business model, and especially in Europe, this mode has obtained fast development with universal.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 the one, the government subsidy policy, lucrative; The 2nd, technology is simple, directly is incorporated into the power networks, and the electric power of unstable generating is diluted by electrical network, does not need the electric power storage link, invest less, but the burden of government and pressure are increasing, so take mostly to subsidize and preferential by the 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 also constantly increases with burden, adds that electricity generation grid-connecting uses to power transformation to the user, and it is huge with the electric power resource waste of secondary power transformation overall process also will to transmit electricity; Especially the exploration through continuous practice reaches unanimity with the conclusion of big quantity research, be exactly the best supply power mode of solar electric power be to be adjusted to target with surplus electricity locally with personal.Therefore, little by little shift to the direction of encouraging the surplus electricity of non-utility power generation to be incorporated into the power networks encouraging to generate electricity by way of merging two or more grid systems in Europe, a large amount of grid-connected systems will increase the ability of personal power supply.
Giving electrical network because the solar electric power that is incorporated into the power networks is the direct inversion of unstable electric power and the power supply that directly utilize sun the subject of knowledge and the object of knowledge to send out, is unsettled, so can not directly use to user load equally.In order to make the solar power system can not only electricity generation grid-connecting, can use by oneself again, at present main mode is to utilize existing solar power generation grid-connecting system and simply integrate from the net system.Therefore, not only need the main device of two cover solar power generation inversion systems, also will increase by two cover systems and integrate required connection switching and charge and discharge device and system control device; Make system construction receive the restriction of two each self-structuring of cover system; System plans as a whole ability of regulation and control and is greatly affected, and system's scale of investment increases the operational efficiency reduction; System energy consumption increases, and investment return reduces.The application number of announcing like Chinese invention patent is that the patent of invention of 200810200725.X " a kind of multipurpose solar energy power generating system " by name is exactly the exemplary systems structure and the representative of scheme.
Can know; Make the solar power system can not only electricity generation grid-connecting; The system that can use by oneself again, its prior art and method, mainly be utilize existing be incorporated into the power networks and leave the existing structure and the function of netting two kinds of systems constitute; Its characteristics be exactly think the power supply of user's AC load, all to pass through storage battery and inverter; Just on maintenance solar power generation grid-connecting system is incorporated into the power networks the basis of constructing; Obtaining solar electric power and carry out electric power storage, is the mode of storage battery electric power storage through charger promptly, and unstable electric power is stored earlier; Resupply user's use after having corresponding electric weight; Thus, make unsettled solar electric power become galvanic current, carry out power conversions through inverter again and satisfy the load need for electricity for user's power supply; System need increase MPPT and DC/DC, aptitude chargeable circuit, the DC/DC that boosts, and user class inverter circuit and related system circuit for regulating and controlling; Be in operation just often as if electrical network; And under the situation of generation deficiency; It is to supply power to AC load behind the charge in batteries through AC/DC change-over circuit and intelligent charger that prior art system structure and electrical path need grid power again; This need expend electric power resource and device resource in a large number through power supply again after the conversion of net inverter.As stated, the solar energy user electric power system of prior art structure and electrical path, not only having wasted resource has in a large number increased investment, has also increased the link and the consume of power converter, has reduced the power supplying efficiency of system.
In order to overcome the defective of prior art, the utility model belongs to and has proposed the be incorporated into the power networks structure of personal multifunction system of a kind of solar electric power, has changed when supplying power for user's AC load; All to pass through storage battery and the system construction of inverter and single internal power path; Make the solar power system can not only electricity generation grid-connecting thereby make to make up, during the multipurpose solar electricity generating and supplying system that can use by oneself again, can reduce the system hardware scale; Reduce investment outlay; Improve running efficiency of system, reduce system energy consumption, increase investment return.
Summary of the invention
Electric power system is constructed and the design defect of electrical path for the solar electric power that solves the existence of prior art and product from existence conditions down is incorporated into the power networks and uses by oneself; Reduce the system hardware scale; Reduce investment outlay; Improve running efficiency of system; Reduce system energy consumption; Increase investment return; And then realization improves the purpose of investment repayment; For this reason; The utility model belongs to and to have proposed the be incorporated into the power networks structure of personal multifunction system of a kind of solar electric power, comprises solar power generation assembly, MPPT and DC/DC circuit, direct current power regulating circuit, DC/AC inverter circuit, discharges and recharges the control and management circuit, system's allotment control circuit, batteries, island detection circuit, 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 the solar power generation assembly is connected the direct current power regulating circuit and connects user's AC load formation Alternating Current Power Supply path of generating electricity through DC/AC inverter circuit, load protection and monitoring and metering circuit and electric power on-off controller b through MPPT with the DC/DC circuit; Be connected electrical network through island detection circuit and electric power on-off controller c with networking protection metering circuit by the DC/AC inverter circuit simultaneously and constitute the electricity generation grid-connecting path; The solar power generation assembly also is connected with the DC/DC circuit to discharge and recharge the control and management circuit and link to each other with batteries through the electric-controlled switch group through MPPT and forms charge path; Batteries through the electric-controlled switch group, discharge and recharge the control and management circuit and connect the direct current power regulating circuit and be connected user's AC load formation electric power storage Alternating Current Power Supply path with the monitoring and metering circuit through electric power on-off controller b and load protection through the DC/AC inverter circuit; Batteries also connects user's DC load through electric-controlled switch group, direct current power regulating circuit and electric power on-off controller e and constitutes electric power storage direct current supply path; Electrical network through electrical network input ammeter and electric power on-off controller a, AC/DC change-over circuit, direct current power regulating circuit, discharge and recharge the control and management circuit, the electric-controlled switch group connects the charge path that batteries constitutes grid power; Electrical network also links to each other with user's AC load through electric power on-off controller d, constitutes the supply path of grid power; System allotment control circuit links to each other the formation control path through system bus and MPPT and DC/DC circuit, direct current power regulating circuit, charging control and management circuit, electric-controlled switch group, island detection circuit, networking protection metering circuit, load protection and monitoring and metering circuit and electric power on-off controller a, electric power on-off controller b, electric power on-off controller d, electric power on-off controller e; And the island detection circuit connects electrical network through electric power on-off controller c and networking protection metering circuit.
The be incorporated into the power networks structure of personal multifunction system of the said a kind of solar electric power of the utility model; It is characterized in that being provided with in the direct current power regulating circuit power monitoring dispensable circuit, low threshold switch and high threshold switch, and respectively with discharge and recharge the control and management circuit and the electric-controlled switch group is connected.
The be incorporated into the power networks structure of personal multifunction system of the said a kind of solar electric power of the utility model is characterized in that being provided with embedded microprocessor, data memory module and program storage block in system's allotment control circuit.
The be incorporated into the power networks structure of personal multifunction system of the said a kind of solar electric power of the utility model; It is characterized in that the direct current power regulating circuit has solar power generation assembly and batteries and AC/DC change-over circuit three road power input end mouths, and have connect DC/AC inverter circuit, electric-controlled switch group respectively and connect electric power on-off controller e to user's DC load be connected three power output end mouths that discharge and recharge the control and management circuit.
The be incorporated into the power networks structure of personal multifunction system of the said a kind of solar electric power of the utility model is characterized in that batteries is divided into whole storage battery more than three groups, and each group storage battery group is connected with the electric-controlled switch group respectively.
In sum; The utility model provides the be incorporated into the power networks structure of personal multifunction system of a kind of solar electric power; Changed solar power system when supplying power for user's AC load, the technical scheme in the system construction that all will just accomplish through storage battery and inverter and single internal power path, thus make and make the solar power system can not only electricity generation grid-connecting at structure; During the multipurpose solar electricity generating and supplying system that can use by oneself again; Reduce the system hardware scale, optimized the structure of system and the constituted mode in scalable internal power path, reduced the power loss and the wasting of resources; Greatly improve the service efficiency of solar electric power, increased investment repayment greatly.
Description of drawings
Fig. 1 is a prior art solar power generation grid-connecting system principle schematic block diagram;
Fig. 2 is that the 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 be incorporated into the power networks structure schematic block diagram of personal multifunction system of the utility model solar electric power;
Fig. 5 is a direct current power regulating circuit principle of work and power schematic block diagram.
Embodiment
As examples of implementation, the be incorporated into the power networks structure of personal multifunction system of a kind of solar electric power is explained that still, technology of the utility model and scheme are not limited to the content that present embodiment provides in conjunction with accompanying drawing.
The utility model embodiment accompanying drawings is following, classical prior art solar power generation grid-connecting system principle schematic block diagram such as Fig. 1.
Be illustrated in figure 2 as the prior art solar power generation from net electric power system schematic block diagram.
The structure schematic block diagram of the solar power generation grid-connecting of prior art and personal multipurpose system is as shown in Figure 3; Be characterized in utilizing prior art solar power generation grid-connecting system and prior art solar power generation after the net electric power system increases MPPT charger, switch controller and system regulation device and intelligent charger and DC/DC change-over circuit, to construct again and integrate and form, system forms fairly simple, still; This system not only needs two cover solar power generation inversion systems; Also will increase by two cover systems and integrate required connection switching and control device, make system construction receive the restriction of two each self-structuring of cover system, system plans as a whole ability of regulation and control and is greatly affected; And system's scale of investment increases; Operational efficiency reduces, and system energy consumption increases, and investment return reduces.
As shown in Figure 4; The be incorporated into the power networks structure of personal multifunction system of a kind of solar electric power of the utility model; Comprise solar power generation assembly (1), MPPT and DC/DC circuit (2), direct current power regulating circuit (3), DC/AC inverter circuit (4), discharge and recharge control and management circuit (5), system's allotment control circuit (6), batteries (7), island detection circuit (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) and connects user's AC load (11) formation Alternating Current Power Supply path of generating electricity through DC/AC inverter circuit (4), load protection and monitoring and metering circuit (15) and electric power on-off controller b (102) through MPPT with DC/DC circuit (2); Be connected electrical network through island detection circuit (8) and electric power on-off controller c (103) with networking protection metering circuit (14) by DC/AC inverter circuit (4) simultaneously and constitute the electricity generation grid-connecting path; Solar power generation assembly (1) also is connected with DC/DC circuit (2) to discharge and recharge control and management circuit (5) and link to each other with batteries (7) through electric-controlled switch group (9) through MPPT and forms charge path; Batteries (7) through electric-controlled switch group (9), discharge and recharge control and management circuit (5) and connect direct current power regulating circuit (3) and be connected user's AC load (11) formation electric power storage Alternating Current Power Supply path with monitoring and metering circuit (15) through electric power on-off controller b (102) and load protection through 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 constitutes electric power storage direct current supply path; Electrical network through electrical network input ammeter (16) and electric power on-off controller a (101), AC/DC change-over circuit (10), direct current power regulating circuit (3), discharge and recharge control and management circuit (5), electric-controlled switch group (9) connects the charge path that batteries (7) constitutes grid power; Electrical network also links to each other with user's AC load (11) through electric power on-off controller d (104), constitutes the supply path of grid power; System allotment control circuit (6) protects 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) to link to each other the formation control path through system bus (13) and MPPT and DC/DC circuit (2), direct current power regulating circuit (3), charging control and management circuit (5), electric-controlled switch group (9), island detection circuit (8), networking; And island detection circuit (8) connects electrical network through electric power on-off controller c (103) and networking protection metering circuit (14).
As shown in Figure 5; The be incorporated into the power networks structure of personal multifunction system of the said a kind of solar electric power of the utility model; It is characterized in that being provided with in the direct current power regulating circuit (3) power monitoring dispensable circuit (31), low threshold switch (32) and high threshold switch (33); And respectively with discharge and recharge control and management circuit (5) and electric-controlled switch group (9) is connected; Through the electric power of MPPT and DC/DC circuit (2) input during greater than upper limit set value or loading demand value, allotment output is through discharging and recharging control and management circuit (5) accumulators group (7) electric power storage at solar power generation assembly (1); During less than the lower limit set; Allotment batteries (7) links to each other with DC/DC circuit (2) power output end with MPPT through electric-controlled switch group (9) and low threshold switch (32); Carry out supplementary power with battery power, make solar power generation assembly (1) and batteries (7) satisfy the demand of user's DC load (12) or user's AC load (11) through the electric power of direct current power regulating circuit (3) allotment back output.
The be incorporated into the power networks structure of personal multifunction system of the said a kind of solar electric power of the utility model; It is characterized in that being provided with embedded microprocessor, data memory module and program storage block in system's allotment control circuit (6); And preset the software module of electric power allotment priority orders data and regulatory process; Need for electricity and the electric power allotment priority orders of setting and the power condition execution corresponding program of solar power generation assembly (1) and batteries (7) that it monitors according to load protection and monitoring and metering circuit (15); Break-make through control 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), electric power on-off controller e (105) and electric-controlled switch group (9) makes the respective electrical power path be in the state that switches on or off accordingly, accomplishes control and regulates electrical path; Also dynamically send the upper and lower limit threshold data of electric power input simultaneously to direct current power regulating circuit (3); Its allotment priority orders is solar power generation assembly (1), batteries (7), electrical network electric power and electrical network high price electric power at a low price, and battery power to carry out supplementary power be to carry out break-make automatically through the low threshold switch (32) in the direct current power regulating circuit (3) to regulate.
The be incorporated into the power networks structure of personal multifunction system of the said a kind of solar electric power of the utility model; 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 mouths; And have connect DC/AC inverter circuit (4), electric-controlled switch group (9) respectively and connect electric power on-off controller e (105) to user's DC load (12) be connected three power output end mouths that discharge and recharge control and management circuit (5); Its power regulating method is when loading demand is satisfied in solar power generation assembly (1) input; If when still having a surplus electricity behind the supply load, the electric power of surplus power is regulated to discharging and recharging the electric power storage of control and management circuit (5) to batteries (7) through high threshold switch (33); When solar power generation assembly (1) input electric power can not satisfy loading demand; Regulate batteries (7) through low threshold switch (32) and supply with user's DC load (12) to DC/AC inverter circuit (4) or through electric power on-off controller e (105) in real time, satisfy the need for electricity of user load with this; When batteries (7) can not satisfy the load need for electricity, direct current power regulating circuit (3) was a reporting system allotment control circuit (6), connects electrical network by system's allotment control circuit (6) control electric power on-off controller d (104) and transfers mains supply to; In the electrical network low ebb electricity price period, can be batteries (7) electric power storage also through control electric power on-off controller a (101).
The be incorporated into the power networks structure of personal multifunction system of the said a kind of solar electric power of the utility model; It is characterized in that batteries (7) is divided into whole storage battery more than three groups; Each group storage battery group is connected with electric-controlled switch group (9) respectively; And each group storage battery group is operated in charging, discharge respectively, prepares one of three kinds of operating states, and system's allotment control circuit (6) is according to the operating state of the corresponding charge capacity adjustment batteries of batteries.
The be incorporated into the power networks structure of personal multifunction system of a kind of solar electric power of the utility model can not only electricity generation grid-connecting in order to make solar power system, can use by oneself again; Through direct current power regulating circuit and system's allotment control circuit and electric-controlled switch group and electric power on-off controller; Changed solar power system when supplying power for user's AC load, the technical scheme in the system construction that all will could accomplish through storage battery and inverter and single internal power path, thus make and make the solar power system can not only electricity generation grid-connecting at structure; During the multipurpose solar electricity generating and supplying system that can use by oneself again; Reduce the system hardware scale, optimized the structure of system and the constituted mode in internal power path, reduced the power loss and the wasting of resources; Greatly improve the service efficiency of solar electric power, increased investment repayment greatly.
Claims (5)
1. the solar electric power structure of personal multifunction system that is incorporated into the power networks; Comprise solar power generation assembly (1), MPPT and DC/DC circuit (2), direct current power regulating circuit (3), DC/AC inverter circuit (4), discharge and recharge control and management circuit (5), system's allotment control circuit (6), batteries (7), island detection circuit (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) and connects user's AC load (11) formation Alternating Current Power Supply path of generating electricity through DC/AC inverter circuit (4), load protection and monitoring and metering circuit (15) and electric power on-off controller b (102) through MPPT with DC/DC circuit (2); Be connected electrical network through island detection circuit (8) and electric power on-off controller c (103) with networking protection metering circuit (14) by DC/AC inverter circuit (4) simultaneously and constitute the electricity generation grid-connecting path; Solar power generation assembly (1) also is connected with DC/DC circuit (2) to discharge and recharge control and management circuit (5) and link to each other with batteries (7) through electric-controlled switch group (9) through MPPT and forms charge path; Batteries (7) through electric-controlled switch group (9), discharge and recharge control and management circuit (5) and connect direct current power regulating circuit (3) and be connected user's AC load (11) formation electric power storage Alternating Current Power Supply path with monitoring and metering circuit (15) through electric power on-off controller b (102) and load protection through 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 constitutes electric power storage direct current supply path; Electrical network through electrical network input ammeter (16) and electric power on-off controller a (101), AC/DC change-over circuit (10), direct current power regulating circuit (3), discharge and recharge control and management circuit (5), electric-controlled switch group (9) connects the charge path that batteries (7) constitutes grid power; Electrical network also links to each other with user's AC load (11) through electric power on-off controller d (104), constitutes the supply path of grid power; System allotment control circuit (6) protects 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) to link to each other the formation control path through system bus (13) and MPPT and DC/DC circuit (2), direct current power regulating circuit (3), charging control and management circuit (5), electric-controlled switch group (9), island detection circuit (8), networking; And island detection circuit (8) connects electrical network through electric power on-off controller c (103) and networking protection metering circuit (14).
2. according to the be incorporated into the power networks structure of personal multifunction system of the said a kind of solar electric power of claim 1, it is characterized in that being provided with embedded microprocessor, data memory module and program storage block in system's allotment control circuit (6).
3. according to the be incorporated into the power networks structure of personal multifunction system of the said a kind of solar electric power of claim 1; It is characterized in that being provided with in the direct current power regulating circuit (3) power monitoring dispensable circuit (31), low threshold switch (32) and high threshold switch (33), and respectively with discharge and recharge control and management circuit (5) and electric-controlled switch group (9) is connected.
4. according to the be incorporated into the power networks structure of personal multifunction system of the said a kind of solar electric power of 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 mouths, and have connect DC/AC inverter circuit (4), electric-controlled switch group (9) respectively and connect electric power on-off controller e (105) to user's DC load (12) be connected three power output end mouths that discharge and recharge control and management circuit (5).
5. according to the be incorporated into the power networks structure of personal multifunction system of the said a kind of solar electric power of claim 1, it is characterized in that batteries (7) is divided into whole storage battery more than three groups, each group storage battery group is connected with electric-controlled switch group (9) respectively.
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| CN 201120289456 CN202134924U (en) | 2011-08-11 | 2011-08-11 | Structure of multifunctional system of solar power and self use connected grid |
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