CN111464111B - Solar power generation intelligent control system - Google Patents
Solar power generation intelligent control system Download PDFInfo
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- CN111464111B CN111464111B CN202010381460.9A CN202010381460A CN111464111B CN 111464111 B CN111464111 B CN 111464111B CN 202010381460 A CN202010381460 A CN 202010381460A CN 111464111 B CN111464111 B CN 111464111B
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- 238000010248 power generation Methods 0.000 title claims abstract description 272
- 238000004146 energy storage Methods 0.000 claims abstract description 37
- 239000000126 substance Substances 0.000 claims 1
- 230000005611 electricity Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 7
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S10/00—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S10/00—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power
- H02S10/20—Systems characterised by their energy storage means
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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
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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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Abstract
The embodiment of the application discloses solar energy power generation intelligence control system includes: the solar energy power generation system comprises a solar energy power generation assembly, a controller, two branch switches, an energy storage element and electric equipment; the controller controls the on and off of the first branch switch, and when the first branch switch is on, the controller controls the electric energy converted by the solar power generation assembly to be stored in the energy storage element through the first branch switch; the controller also controls the on and off of the second branch switch, and controls the electric energy converted by the solar power generation assembly to be led in through the second branch switch to supply power for the user equipment when the second branch switch is on; the controllers of the two solar power generation systems are connected with each other, and when the electric quantity of one solar power generation system is insufficient, the electric energy is borrowed from the other solar power generation system. According to the embodiment of the application, electric energy among the power generation systems is intelligently allocated, and the situation that the power generation systems cannot work normally due to insufficient electric quantity can be reduced as much as possible.
Description
Technical Field
The application relates to the technical field of solar power generation, in particular to an intelligent control system for solar power generation.
Background
Solar energy is increasingly favored by people as an inexhaustible and environment-friendly renewable energy source, and various photovoltaic application products adopting solar power generation emerge endlessly in life and work of people. In daily life of people, common solar photovoltaic products include solar illuminating lamps, solar advertising boards, solar watches, solar chargers, solar water heaters, solar air conditioners and the like. Although the solar photovoltaic product is energy-saving and environment-friendly, the energy storage capacity is limited, and particularly when the solar photovoltaic product works in continuous rainy days or at night, the solar photovoltaic product can not absorb light energy to generate electricity due to insufficient electric energy storage capacity, so that the condition that the product cannot work normally occurs, and the working efficiency of the product is influenced. Therefore, how to overcome the above-mentioned drawbacks is a very worthy topic to be studied.
Disclosure of Invention
The embodiment of the application provides a solar power generation intelligent control system, and the situation that the solar power generation intelligent control system cannot normally work due to insufficient electric quantity can be reduced as much as possible by intelligently allocating electric energy among power generation systems.
The embodiment of the application provides a solar energy power generation intelligence control system, includes: the solar energy power generation system comprises a first solar energy power generation system and a second solar energy power generation system, wherein the first solar energy power generation system comprises a first solar energy power generation assembly, a first controller, a first branch switch, a second branch switch, a first energy storage element and first electric equipment; the first solar power generation assembly is connected with the first controller, the first branch switch and the second branch switch are respectively connected with the first controller, the first energy storage element is connected with the first branch switch, and the first power utilization equipment is connected with the second branch switch;
the first controller is used for controlling the on and off of the first branch switch, and when the first branch switch is on, the first controller controls the electric energy converted by the first solar power generation assembly to be stored in the first energy storage element through the first branch switch; the first controller is further configured to control the second branch switch to be turned on and off, and when the second branch switch is turned on, the first controller controls the electric energy converted by the first solar power generation assembly to be led in through the second branch switch to supply power to the first user equipment;
the second solar power generation system comprises a second solar power generation assembly, a second controller, a third branch switch, a fourth branch switch, a second energy storage element and second electrical equipment; the second solar power generation assembly is connected with the second controller, the third branch switch and the fourth branch switch are respectively connected with the second controller, the second energy storage element is connected with the third branch switch, and the second electrical equipment is connected with the fourth branch switch; the second controller is used for controlling the third branch switch to be switched on and off, and when the third branch switch is switched on, the second controller controls the electric energy converted by the second solar power generation assembly to be stored in the second energy storage element through the third branch switch; the second controller is further configured to control the fourth branch switch to be turned on and off, and when the fourth branch switch is turned on, the second controller controls the electric energy converted by the second solar power generation assembly to be led in through the fourth branch switch to supply power to the second user equipment;
the first controller is connected with the second controller, and the first controller is further used for borrowing electric energy from the second solar power generation system when the electric quantity of the first solar power generation system is insufficient.
As an optional embodiment, the first controller is specifically configured to borrow the surplus electric quantity value Q from the second solar power generation system when the total electric quantity value of the first solar power generation system is lower than a first preset electric quantity value.
As an optional embodiment, the first controller is further configured to return the electric energy to the second solar power generation system when the total electric energy value of the first solar power generation system exceeds a second preset electric energy value, where the second preset electric energy value is greater than the first preset electric energy value.
As an optional implementation manner, when the total electric quantity value of the first solar power generation system exceeds the second preset electric quantity value and the interval duration from the time of borrowing the electric quantity to the current time is within a preset duration, the first controller returns the electric energy to the second solar power generation system to be an equivalent electric quantity value Eq, where the equivalent electric quantity value Eq is equal to the surplus electric quantity value Q, and a difference value between the second preset electric quantity value and the surplus electric quantity value Q is greater than or equal to the first preset electric quantity value.
As an optional implementation manner, when the total electric quantity value of the first solar power generation system exceeds the second preset electric quantity value and the interval duration from the time of borrowing the electric quantity to the current time is longer than a preset duration, the first controller returns the electric energy to the second solar power generation system to be an excess electric quantity value Wt, wherein Wt is δtQ, wherein, deltatIs a coefficient of electric quantity, δ, associated with the duration of said intervaltAnd the difference value between the second preset electric quantity value and the excess electric quantity value Wt is greater than or equal to the first preset electric quantity value.
As an alternative embodiment, said δtProportional to the size of the interval duration.
As an alternative embodiment, the first controller is in the first solar power systemThe electric energy value exceeds the second preset electric energy value, the interval duration from the moment of borrowing the electric quantity to the current moment is longer than the preset duration, the electric energy returned to the second solar power generation system is the excess electric energy value Wt, wherein the Wt is deltat*σrQ, wherein, deltatIs a coefficient of electric quantity associated with the duration of the interval, and is deltatGreater than 1, σrRefers to a rating coefficient associated with a credit rating of the first solar power system, and σrThe difference value between the second preset electric quantity value and the excess electric quantity value Wt is greater than or equal to the first preset electric quantity value and is a positive number less than or equal to 1.
As an alternative embodiment, said δtProportional to the size of the interval duration, σrInversely proportional to the credit rating of the first solar power system.
As an alternative embodiment, said δtAnd the sigmarThe product of (a) is greater than or equal to 1.
As an optional implementation manner, the second controller is further configured to borrow electric energy from the first solar power generation system when the second solar power generation system is low in electric quantity.
The intelligent control system for solar power generation in the embodiment of the application comprises at least two solar power generation systems, wherein each solar power generation system comprises a solar power generation assembly, a controller, two branch switches, an energy storage element and electric equipment; the controller can control the on and off of the first branch switch, and when the first branch switch is on, the controller controls the electric energy converted by the solar power generation assembly to be stored in the energy storage element through the first branch switch; the controller can also control the on and off of the second branch switch, and when the second branch switch is on, the controller controls the electric energy converted by the solar power generation assembly to be led in through the second branch switch to supply power for the user equipment; the controllers of all the solar power generation systems are connected with each other, and when the electric quantity of one solar power generation system is insufficient, the controller can intelligently borrow electric energy from other solar power generation systems to maintain normal operation. Therefore, by implementing the embodiment of the application, the situation that the power cannot normally work due to insufficient electric quantity can be reduced as much as possible by intelligently allocating the electric energy among the power generation systems.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a system architecture diagram according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of an intelligent control system for solar power generation according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "comprises" and "comprising," and any variations thereof, in the embodiments of the present application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Furthermore, the terms "first," "second," and "third," etc. are used to distinguish between different objects and are not used to describe a particular order.
The embodiment of the application provides a solar power generation intelligent control system, which can reduce the situation that the solar power generation system cannot work normally due to insufficient electric quantity as much as possible by intelligently allocating electric energy among power generation systems.
Referring to fig. 1, a system framework is provided in an embodiment of the present application. The solar power generation intelligent control system may include at least two solar power generation systems. As shown in fig. 1 by way of example, the solar power generation intelligent control system may include a solar power generation system 1, a solar power generation system 2, a solar power generation system 3, … …, and a solar power generation system n. The solar power generation systems in the solar power generation intelligent control system can be interconnected, and a foundation is laid for intelligently allocating electric energy among the solar power generation systems. Fig. 1 only shows that the solar power generation system 1 is connected to each of the other solar power generation systems, and it is understood that each of the other solar power generation systems may also be connected to each other, for example, the solar power generation system 2 is connected to each of the other solar power generation systems, the solar power generation system 3 is connected to each of the other solar power generation systems, and so on. The solar power generation systems can be connected and communicated in a wired mode and/or a wireless mode.
In practical applications, a solar power generation system can be regarded as a solar photovoltaic product, such as a solar lighting lamp, a solar insect-killing lamp, a solar billboard, a solar watch, a solar charger, a solar water heater, a solar air conditioner, and the like.
It is understood that fig. 1 only shows one of the connection modes, and other connection modes are also possible, such as connection of the solar power generation system 1 with the solar power generation system 2, connection of the solar power generation system 2 with the solar power generation system 3, connection of the solar power generation system 3 with the solar power generation system 4, … …, and so on. For example, if there are 10 solar lighting lamps on the road side, the 10 solar lighting lamps may be any two solar lighting lamps connected with each other, or each solar lighting lamp may be only connected with two solar lighting lamps adjacent to the solar lighting lamp.
Referring to fig. 2, a schematic structural diagram of an intelligent control system for solar power generation according to an embodiment of the present application is shown. Fig. 2 illustrates an example in which the intelligent solar power generation control system includes two solar power generation systems, as shown in fig. 2, the intelligent solar power generation control system may include a first solar power generation system 10 and a second solar power generation system 20, and the first solar power generation system 10 may include at least a first solar power generation assembly 101, a first controller 102, a first branch switch 103, a second branch switch 104, a first energy storage element 105, and a first electric device 106; the first solar power generation assembly 101 is connected with a first controller 102, the first branch switch 103 and the second branch switch 104 are respectively connected with the first controller 102, the first energy storage element 105 is connected with the first branch switch 103, and the first electric equipment 106 is connected with the second branch switch 104; the first controller 102 is configured to control the first branch switch 103 to be turned on and off, and when the first branch switch 103 is turned on, control the electric energy converted by the first solar power generation assembly 101 to be stored in the first energy storage element 105 through the first branch switch 103; the first controller 102 is further configured to control the second branch switch 104 to be turned on and off, and when the second branch switch 104 is turned on, control the electric energy converted by the first solar power generation assembly 101 to be led in through the second branch switch 104 to supply power to the first user equipment 106;
the second solar power generation system 20 may include at least a second solar power generation assembly 201, a second controller 202, a third branch switch 203, a fourth branch switch 204, a second energy storage element 205, and a second electrical device 206; the second solar power generation assembly 201 is connected with the second controller 202, the third branch switch 203 and the fourth branch switch 204 are respectively connected with the second controller 202, the second energy storage element 205 is connected with the third branch switch 203, and the second electrical equipment 206 is connected with the fourth branch switch 204; the second controller 202 is configured to control the third branch switch 203 to be turned on and off, and when the third branch switch 203 is turned on, the second controller controls the electric energy converted by the second solar power generation assembly 201 to be stored in the second energy storage element 205 through the third branch switch 203; the second controller 202 is further configured to control the fourth branch switch 204 to be turned on and off, and when the fourth branch switch 204 is turned on, control the electric energy converted by the second solar power generation assembly 201 to be led in through the fourth branch switch 204 to supply power to the second user equipment 206;
the first controller 102 is connected to the second controller 202, and the first controller 201 is further configured to borrow electric energy from the second solar power generation system 20 when the first solar power generation system 10 is low in electric quantity.
In the embodiment of the present application, each of the first solar power generation assembly 101 and the second solar power generation assembly 201 may include a plurality of solar panels, and the solar panels absorb sunlight and convert solar radiation energy into electric energy directly or at intervals through a photoelectric effect or a photochemical effect. The first energy storage element 105 and the second energy storage element 205 may each be a device for storing electrical energy, such as a battery or other device that functions similarly to a battery. The first electrical device 106 and the second electrical device 206 are devices consuming electrical energy, such as various lamps, mobile terminals (e.g., mobile phones, tablet computers, etc.), LED display screens, and the like. The first solar power generation system 10 and/or the second solar power generation system 20 may further include other components, such as an inverter, a switching power tube, a display and the like, according to the requirements and functions of the first solar power generation system and/or the second solar power generation system.
In the embodiment of the present application, the first solar power generation system 10 uses sunlight as energy, receives solar radiation through the first solar power generation assembly 101, converts light energy into electric energy, and continuously charges the first energy storage element 105 through a branch line and supplies power to the first electrical device 106 through another branch line under the control of the first controller 102. Specifically, the first controller 102 controls the first branch switch 103 to be turned on and off, so that the first energy storage element 105 can be continuously charged when the first branch switch 103 is turned on, and the first energy storage element 105 is stopped being charged when the first branch switch 103 is turned off. The first controller 102 further controls the second branch switch 104 to be turned on and off, and when the second branch switch 104 is turned on, power may be continuously supplied to the first electrical device 106, and when the second branch switch 104 is turned off, power may be stopped from being supplied to the first electrical device 106. The first controller 102 may directly supply the electric energy converted by the first solar power generation assembly 101 to the first electric device 106, or may release the electric energy stored in the first energy storage element 105 to supply the electric energy to the first electric device 106 when the first branch switch 103 and the second branch switch 104 are both turned on.
Similarly, the second solar power generation system 20 uses sunlight as energy, receives solar radiation through the second solar power generation assembly 201, converts light energy into electric energy, and continuously charges the second energy storage element 205 through a branch line under the control of the second controller 202, and supplies power to the second electrical device 206 through another branch line. Specifically, the second controller 202 controls the third branch switch 203 to be turned on and off, so that the second energy storage element 205 can be continuously charged when the third branch switch 203 is turned on, and the second energy storage element 205 is stopped being charged when the third branch switch 203 is turned off. The second controller 202 further controls the fourth branch switch 204 to be turned on and off, so that power can be continuously supplied to the second electrical device 206 when the fourth branch switch 204 is turned on, and power supply to the second electrical device 206 is stopped when the fourth branch switch 204 is turned off. The second controller 202 may directly supply the electric energy converted by the second solar power generation assembly 201 to the second electrical device 206, or may release the electric energy stored in the second energy storage element 205 to supply the electric energy to the second electrical device 206 when the third branch switch 203 and the fourth branch switch 204 are both turned on.
The first solar power system 10 and the second solar power system 20 may be the same type of solar photovoltaic product, such as solar illumination lamps. The first solar power generation system 10 and the second solar power generation system 20 may also be different types of solar photovoltaic products, such as one solar watch and the other solar charger; the other is a solar energy illuminating lamp and the other is a solar energy billboard.
In the embodiment of the present application, the first solar power generation system 10 and the second solar power generation system 20 may interact with each other, and specifically, the first controller 102 of the first solar power generation system 10 and the second controller 202 of the second solar power generation system 20 may be communicatively connected in a wired manner and/or a wireless manner. In the event of a shortage of power in the first solar power system 10, power may be borrowed from the second solar power system 20. In this way, when the amount of electricity stored in the first energy storage element 105 of the first solar power generation system 10 is insufficient and the first solar power generation module 101 cannot receive sunlight (for example, at night or when there is no sun in rainy days) to generate electricity, the normal operation of the first solar power generation system 10 is maintained by borrowing electric energy from the second solar power generation system 20, so that the occurrence rate of the first solar power generation system 10 failing to operate normally due to the insufficient amount of electricity can be reduced, and the influence on the operating efficiency of the first solar power generation system 10 can be reduced.
Optionally, the first controller 102 may be specifically configured to borrow the surplus electric quantity value Q from the second solar power generation system 20 when the total electric quantity value of the first solar power generation system 10 is lower than the first preset electric quantity value.
The first preset electric quantity value may be a stored preset value (the currently stored first preset electric quantity value may be updated according to an update instruction input from the host device or the human-computer interaction interface), for example, the first preset electric quantity value may be 5%, 10%, 12%, 15%, 18% or other values of the total electric capacity (i.e., the full-grid electric quantity) of the first solar power generation system 10. The surplus power value Q may be a fixed value (the surplus power value Q may be adaptively adjusted according to actual needs), for example, the surplus power value Q may be 20%, 30%, 45%, 50%, 55% or other values of the total capacity (i.e., the full grid capacity) of the first solar power generation system 10; also for example, the surplus power value Q may be 20%, 30%, 45%, 50%, 55% or another value of the total capacity (i.e., the full grid capacity) of the second solar power generation system 20. When the current remaining total power value of the first solar power generation system 10 is lower than the first preset power value, the surplus power value Q may be borrowed from the second solar power generation system 20.
Optionally, the first controller 102 may be further configured to return the electric energy to the second solar power generation system 20 when the total electric energy value of the first solar power generation system 10 exceeds a second preset electric energy value, where the second preset electric energy value is greater than the first preset electric energy value.
Specifically, when the current remaining total electric energy value of the first solar power generation system 10 reaches a second preset electric energy value (for example, the first solar power generation assembly 101 of the first solar power generation system 10 absorbs sunlight for power generation in daytime), the electric energy borrowed from the second solar power generation system 20 may be returned to the second solar power generation system 20. The second preset electric quantity value may be a stored preset value (the currently stored second preset electric quantity value may be updated according to an update instruction input from the host device or the human machine interface), for example, the second preset electric quantity value may be 50%, 55%, 60%, 70%, 80% or another value of the electric capacity (i.e., the full grid electric quantity) of the first solar power generation system 10.
Optionally, when the total electric quantity value of the first solar power generation system 10 exceeds a second preset electric quantity value and the interval duration from the time of borrowing the electric quantity to the current time is within the preset duration, the first controller 102 returns the electric energy to the second solar power generation system 20 as an equivalent electric quantity value Eq, where the equivalent electric quantity value Eq is equal to the surplus electric quantity value Q, and a difference between the second preset electric quantity value and the surplus electric quantity value Q is greater than or equal to the first preset electric quantity value.
Specifically, how much electric energy the first solar power generation system 10 returns to the second solar power generation system 20 can be determined by the combination of the total amount of electric energy currently remaining in the first solar power generation system 10 and the borrowing time (i.e. the time interval between borrowing electric energy and returning electric energy). When the current remaining total electric quantity value of the first solar power generation system 10 exceeds the second preset electric quantity value and the borrowing electric quantity duration is within the preset duration, the equivalent electric quantity value Eq equal to the borrowed surplus electric quantity value Q is returned to the second solar power generation system 20. The preset time period may be a stored preset value (which may be fixed or adaptively adjusted according to actual requirements), for example, the preset time period is 6 hours, 8 hours, 8.5 hours, 10 hours, 12 hours, 15 hours, 24 hours, or other values. In order to ensure that the first solar power generation system 10 does not borrow the electric quantity from the second solar power generation system 20 due to the insufficient electric quantity after returning the electric quantity, the difference between the second preset electric quantity value and the surplus electric quantity value Q is greater than or equal to the first preset electric quantity value, that is, after the first solar power generation system 10 returns the electric quantity, the remaining total electric quantity value is not lower than the first preset electric quantity value.
Optionally, the first controller 102 is in the first solar power generation systemThe total electric quantity value of the system 10 exceeds a second preset electric quantity value, and the interval duration from the moment of borrowing the electric quantity to the current moment is longer than the preset duration, the electric energy returned to the second solar power generation system 20 is an excess electric quantity value Wt, wherein Wt is δtQ, wherein, deltatIs a coefficient of electric quantity, delta, associated with the duration of the intervaltAnd if the difference value between the second preset electric quantity value and the excess electric quantity value Wt is greater than 1, the difference value is greater than or equal to the first preset electric quantity value.
Specifically, when the current remaining total electric quantity value of the first solar power generation system 10 exceeds the second preset electric quantity value and the time length of the borrowed electric quantity exceeds the preset time length, the electric quantity to be returned to the second solar power generation system 20 may not be equal to the borrowed surplus electric quantity value Q. Preferably, the first solar power generation system 10 excessively returns the electric power to the second solar power generation system 20, that is, the returned excess electric power value Wt is greater than the surplus electric power value Q. Wherein, the excess electric quantity value Wt can be equal to the surplus electric quantity value Q multiplied by an electric quantity coefficient deltat。δtIs a number greater than 1, and δtIs proportional to the time length of the borrowing electricity quantity (i.e. the time length of the interval between the borrowing electricity quantity and the returning electricity quantity), i.e. the longer the time length of the borrowing electricity quantity is, the delta istThe larger the electric quantity is, the more the first solar power generation system 10 needs to return to the second solar power generation system 20; conversely, the shorter the duration of borrowing electricity, the more δtThe smaller the amount of power that the first solar power system 10 needs to return to the second solar power system 20 is correspondingly reduced. In addition, in order to ensure that the first solar power generation system 10 does not borrow the electric power from the second solar power generation system 20 due to the lack of the electric power after returning the electric power, the difference between the second preset electric power value and the excess electric power value Wt is greater than or equal to the first preset electric power value, that is, after the first solar power generation system 10 returns the electric power, the remaining total electric power value is not lower than the first preset electric power value.
For example, when the remaining amount of the first solar power generation system 10 is less than 10% (the first preset electric quantity value) of the total electric capacity (the full electric quantity), 50% (50% of the total electric capacity of the first solar power generation system 10) of the electric quantity is borrowed from the second solar power generation system 20. When the first solar power generation system 10 absorbs sunlight for power generation, so that the current total electric quantity of the first solar power generation system 10 exceeds 80% (second preset electric quantity value), determining the interval duration between the current moment and the moment of borrowing the electric quantity, and when the interval duration is within 12 hours (preset duration), returning 50% of the electric quantity of the total electric quantity of the first solar power generation system 10 to the second solar power generation system 20 by the first solar power generation system 10, wherein at this time, the first solar power generation system 10 returns the sum of the electric quantities, namely the amount of the borrowing of the sum of the electric quantity. When the time interval between the current time and the time of borrowing the electric quantity is more than 12 hours, for example, 15 hours, the first solar power generation system 10 returns the electric quantity of 55% of the total electric capacity of the first solar power generation system to the second solar power generation system 20, and at this time, the first solar power generation system 10 returns the excess electric quantity, and the electric quantity coefficient delta is returnedtIs 1.1. For another example, when the interval duration is 18 hours, the first solar power generation system 10 returns the electric quantity of 60% of the total electric capacity thereof to the second solar power generation system 20, and the electric quantity coefficient δtIs 1.2. That is, the longer the time to borrow power, the more power to be returned.
Optionally, when the total electric quantity value of the first solar power generation system 10 exceeds a second preset electric quantity value and the interval duration from the time of borrowing the electric quantity to the current time is longer than a preset duration, the first controller 102 returns the electric energy to the second solar power generation system 20 as an excess electric quantity value Wt, where Wt is δt*σrQ, wherein, deltatRefers to the coefficient of electric quantity associated with the interval duration, and δtGreater than 1, σrRefers to a rating coefficient associated with the credit rating of the first solar power generation system 10, and σrThe difference value between the second preset electric quantity value and the excess electric quantity value Wt is greater than or equal to the first preset electric quantity value and is a positive number less than or equal to 1.
The solar power system may be rated for credit based on historical borrowing data, e.g., the shorter the average length of time the amount of power is borrowed, the higher the credit rating, and the longer the average length of time the amount of power is borrowed, the lower the credit rating. The credit rating can be divided into several grades, such as three grades of high, medium and low, and further such as 1 grade,Four levels of level 2, level 3 and level 4. The electric quantity value to be returned can be adjusted according to the credit level. Specifically, when the total remaining electric quantity currently remaining in the first solar power generation system 10 exceeds the second preset electric quantity value and the time length of borrowing the electric quantity exceeds the preset time length, the excess electric quantity value Wt that needs to be returned to the second solar power generation system 20 may be equal to the borrowed surplus electric quantity value Q multiplied by an electric quantity coefficient δtAnd a coefficient of rank σr. Wherein, deltatIs a number greater than 1, σrIs a positive number less than or equal to 1. In addition, in order to ensure that the first solar power generation system 10 does not borrow the electric power from the second solar power generation system 20 due to the lack of the electric power after returning the electric power, the difference between the second preset electric power value and the excess electric power value Wt is greater than or equal to the first preset electric power value, that is, after the first solar power generation system 10 returns the electric power, the remaining total electric power value is not lower than the first preset electric power value.
Optionally, deltatMay be proportional to the size of the interval duration, σrMay be inversely proportional to the credit rating of the first solar power system 10. That is, the longer the interval between the borrowing power amount and the returning power amount is, δtThe larger; the shorter the interval between borrowing and returning the electricity, the shorter deltatThe smaller. The higher the credit rating of the first solar power system 10, σrThe smaller; the lower the credit rating of the first solar power system 10, σrThe larger.
Optionally, deltatAnd σrThe product of (d) may be greater than or equal to 1. Thus, when the first solar power generation system 10 returns the electric power beyond the preset time, the borrowed electric power needs to be returned to the second solar power generation system 20 in excess.
For example, when the remaining power is less than 10% (the first preset power value) of the total power capacity (the full power), the first solar power generation system 10 borrows 50% (50% of the total power capacity of the first solar power generation system 10) of power from the second solar power generation system 20. The current total power of the first solar power generation system 10 exceeds 80% (the second preset power value) and the time between the current time and the power borrowing timeWhen the interval time is longer than 12 hours (preset time), for example, the interval time is 18 hours, assuming that the credit rating of the first solar power generation system 10 is "high", the electric quantity coefficient δ corresponding to the interval time of 18 hourst1.5, the credit rating of the first solar power generation system 10 is "high" corresponding to the rating coefficient σrIs 0.7. The excess electric quantity Wt of the first solar power generation system 10 is returned to the second solar power generation system 20 at this time as 1.5 × 0.7 × 50% or 52.5%, that is, 52.5% of the total electric capacity of the first solar power generation system 10 is returned. Assuming that the credit rating of the first solar power generation system 10 is "medium", the interval duration is 18 hours, and the corresponding electric quantity coefficient delta ist1.5, the corresponding rating coefficient σ "in" the credit rating of the first solar power generation system 10rIs 0.8. The excess electric quantity Wt of the first solar power generation system 10 is returned to the second solar power generation system 20 at this time as 1.5 × 0.8 × 50% >, i.e., 60% of the total electric capacity of the first solar power generation system 10 is returned. In the case where the time intervals for borrowing the electric power are equal, the higher the credit rating of the first solar power generation system 10 is, the less the electric power to be returned is, and the lower the credit rating of the first solar power generation system 10 is, the more the electric power to be returned is.
Optionally, the second controller 202 may be further configured to borrow power from the first solar power generation system 10 when the second solar power generation system 20 is low in power.
Similarly, when the second solar power generation system 20 is low in power, the first solar power generation system 10 may be borrowed with electric power. When the second solar power generation assembly 201 of the second solar power generation system 20 absorbs sunlight for power generation, so that the current total electric quantity of the second solar power generation system 20 exceeds a certain electric quantity value, the electric quantity can be returned to the first solar power generation system 10 in equal or excess amount according to the time interval of the borrowing electric quantity, and the specific implementation process of the method can refer to the process of borrowing and returning the electric quantity from the first solar power generation system 10 to the second solar power generation system 20, which is not described herein again.
The first solar power generation system 10 and the second solar power generation system 20 in the embodiment of the present application may be two or any two of a plurality of solar power generation systems (e.g., the solar power generation system 1, the solar power generation system 2, the solar power generation systems 3, … …, and the solar power generation system n) included in the solar power generation intelligent control system. When the first solar power generation system 10 is low in power and borrows power from the second solar power generation system 20, the second solar power generation system 20 may be the solar power generation system closest to the first solar power generation system 10 in the intelligent solar power generation control system, or the second solar power generation system 20 may be the solar power generation system with the largest remaining total power in the intelligent solar power generation control system, which is not limited in the embodiment of the present application.
Therefore, the intelligent control system for solar power generation in the embodiment of the application comprises at least two solar power generation systems, wherein each solar power generation system comprises a solar power generation assembly, a controller, two branch switches, an energy storage element and electric equipment; the controller can control the on and off of the first branch switch, and when the first branch switch is on, the controller controls the electric energy converted by the solar power generation assembly to be stored in the energy storage element through the first branch switch; the controller can also control the on and off of the second branch switch, and when the second branch switch is on, the controller controls the electric energy converted by the solar power generation assembly to be led in through the second branch switch to supply power for the user equipment; the controllers of all the solar power generation systems are connected with each other, and when the electric quantity of one solar power generation system is insufficient, the controller can intelligently borrow electric energy from other solar power generation systems to maintain normal operation. Therefore, by implementing the embodiment of the application, the situation that the power cannot normally work due to insufficient electric quantity can be reduced as much as possible by intelligently allocating the electric energy among the power generation systems.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In practical application, the components in the system according to the embodiment of the present application may be combined, divided, and deleted according to actual needs.
The solar power generation intelligent control system disclosed in the embodiment of the present application is described in detail above, and a specific example is applied in the description to explain the principle and the implementation manner of the present application, and the description of the above embodiment is only used to help understand the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (3)
1. A solar power generation intelligent control system, comprising: the solar energy power generation system comprises a first solar energy power generation system and a second solar energy power generation system, wherein the first solar energy power generation system comprises a first solar energy power generation assembly, a first controller, a first branch switch, a second branch switch, a first energy storage element and first electric equipment; the first solar power generation assembly is connected with the first controller, the first branch switch and the second branch switch are respectively connected with the first controller, the first energy storage element is connected with the first branch switch, and the first power utilization equipment is connected with the second branch switch; the first controller is used for controlling the on and off of the first branch switch, and when the first branch switch is on, the first controller controls the electric energy converted by the first solar power generation assembly to be stored in the first energy storage element through the first branch switch; the first controller is further configured to control the second branch switch to be turned on and off, and when the second branch switch is turned on, the first controller controls the electric energy converted by the first solar power generation assembly to be led in through the second branch switch to supply power to the first electrical device;
the second solar power generation system comprises a second solar power generation assembly, a second controller, a third branch switch, a fourth branch switch, a second energy storage element and second electrical equipment; the second solar power generation assembly is connected with the second controller, the third branch switch and the fourth branch switch are respectively connected with the second controller, the second energy storage element is connected with the third branch switch, and the second electrical equipment is connected with the fourth branch switch; the second controller is used for controlling the third branch switch to be switched on and off, and when the third branch switch is switched on, the second controller controls the electric energy converted by the second solar power generation assembly to be stored in the second energy storage element through the third branch switch; the second controller is further configured to control the fourth branch switch to be turned on and off, and when the fourth branch switch is turned on, the second controller controls the electric energy converted by the second solar power generation assembly to be introduced through the fourth branch switch to supply power to the second electrical device;
the first controller is connected with the second controller, and is further used for borrowing electric energy from the second solar power generation system when the electric quantity of the first solar power generation system is insufficient;
wherein the content of the first and second substances,
the first controller is specifically used for borrowing a surplus electric quantity value Q from the second solar power generation system when the total electric quantity value of the first solar power generation system is lower than a first preset electric quantity value;
the first controller is further configured to return electric energy to the second solar power generation system when the total electric energy value of the first solar power generation system exceeds a second preset electric energy value, wherein the second preset electric energy value is greater than the first preset electric energy value;
when the total electric quantity value of the first solar power generation system exceeds the second preset electric quantity value and the interval duration from the moment of borrowing electric quantity to the current moment is within a preset duration, the electric energy returned to the second solar power generation system by the first controller is an equivalent electric quantity value Eq which is equal to the surplus electric quantity value Q, wherein the difference value between the second preset electric quantity value and the surplus electric quantity value Q is greater than or equal to the first preset electric quantity value;
when the total electric quantity value of the first solar power generation system exceeds the second preset electric quantity value and the interval duration from the moment of borrowing the electric quantity to the current moment is longer than the preset duration, the first controller outputs the second preset electric quantity value to the second controllerThe electric energy returned by the solar power generation system is an excess electric quantity value Wt, wherein the Wt is deltatQ, wherein, deltatIs a coefficient of electric quantity, δ, associated with the duration of said intervaltAnd the difference value between the second preset electric quantity value and the excess electric quantity value Wt is greater than or equal to the first preset electric quantity value.
2. The intelligent control system of solar power generation of claim 1, wherein δtProportional to the size of the interval duration.
3. The intelligent control system for solar power generation according to any one of claims 1-2, wherein the second controller is further configured to borrow electric power from the first solar power generation system when the second solar power generation system is low in power.
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