Photovoltaic energy storage integrated system

Abstract

The invention relates to the technical field of charging and discharging control, in particular to a photovoltaic energy storage integrated system which is composed of a photovoltaic power generation module, a photovoltaic energy storage module, a photovoltaic energy storage distribution module, a photovoltaic adjusting module, a photovoltaic energy storage control module and an intelligent control module. According to the photovoltaic energy storage integrated system, AC-DC conversion and adjustment processing of the variable current control module on the power distribution network module and energy storage and discharge control of the energy storage control module are controlled, so that energy storage of the energy storage control module and complementary power supply control of the power distribution network module on the charging pile module are completed; and meanwhile, the state of the energy storage control module is judged in cooperation with the electric energy judgment module, so that the intelligent control module controls the power distribution control module to receive electric energy emitted by photovoltaic in the charging pile system when the energy storage control module is not full, and controls the photovoltaic adjustment module to supply power to the charging pile system when the energy storage control module is full. The utilization rate of photovoltaic electric energy is improved, the electric energy transmission loss is reduced, and meanwhile the photovoltaic power supply requirement is met.

Description

Technical Field

[0001] The present invention relates to the technical field of charge and discharge control, and in particular to an integrated photovoltaic energy storage system. Background Art

[0002] The photovoltaic energy storage integrated system is a microgrid system composed of photovoltaic equipment and energy storage system. When there is sufficient sunlight during the day, the photovoltaic array generates electricity, part of which is converted by the inverter to power the load, and the other part is used to charge the energy storage battery. At night or when there is insufficient sunlight, the energy storage battery discharges and converts the electricity into AC power to power the load through the inverter. If the energy storage battery is insufficient, the system can also switch to the grid power supply mode to ensure the normal operation of the load, meet the daily electricity needs of the family, and reduce electricity bills. In the event of a power outage, the energy storage battery can provide emergency power for the family to ensure basic electricity consumption.

[0003] When using electricity, photovoltaic power supply and distribution network are both transmitted in the form of high voltage electricity. When the power supply is transmitted over a long distance, it may cause power loss, which is not conducive to the full utilization of electricity. In addition, the power supply is mostly allocated artificially according to the average power consumption, which will cause a large difference between the power supply and the actual power supply. The uneven power supply distribution increases the tedious work of allocation. Summary of the invention

[0004] The purpose of the present invention is to provide an integrated photovoltaic energy storage system to solve the problems raised in the above background technology that when power is transmitted over long distances, it may cause power loss, which is not conducive to the full utilization of power, and the power supply is mostly distributed artificially according to the average power consumption, which will cause a large difference between the power supply and the actual power supply, and the uneven power supply distribution increases the tedious work of allocation. In order to achieve the above purpose, the present invention provides the following technical solutions: an integrated photovoltaic energy storage system, which consists of a photovoltaic power generation module, a photovoltaic energy storage module, a photovoltaic energy storage distribution module, a photovoltaic regulation module, a photovoltaic energy storage control module, an intelligent control module, a distribution network module, a charging pile module, an AC control module and a power supply allocation control module, wherein the intelligent control module is connected to the photovoltaic regulation module, and is used to output a first pulse signal and adjust the electric energy output by the voltage regulation circuit, to output a second pulse signal and control the operation of the energy storage control module, to output a third pulse signal and control the operation of the current conversion control module, and to output a fourth pulse signal and a fifth pulse signal according to the signal output by the electric energy judgment module. The fourth pulse signal is used to control the power distribution control module to perform current regulation and bidirectional DC-DC transmission control. The power distribution control module includes a charging pile system, which is a charging pile near the charging pile module. The charging pile system is connected to the intelligent control module and the photovoltaic regulation module. The module is used to receive the electric energy generated by the photovoltaic in the charging pile system and regulate the current through the fourth pulse signal to regulate the current of the current regulation circuit. The module is used to control the operation of the bidirectional DC-DC circuit through the fifth pulse signal, and to transmit the current-regulated electric energy to the energy storage control module of the nearby charging pile through the bidirectional DC-DC circuit for charging. The bidirectional DC-DC circuit is also used to control the electric energy of the charging pile system to be input into the charging pile module.

[0005] Further preferably, the photovoltaic energy storage module is used to obtain the daytime power generation of the photovoltaic power generation component, and then compare it with the energy storage capacity of the energy storage battery. When the daytime power generation of the photovoltaic power generation component is not greater than the energy storage capacity of the energy storage battery, the daytime power generation of the photovoltaic power generation component is stored in the energy storage battery at night; otherwise, the daytime power generation of the photovoltaic power generation component is connected to the grid for surplus. The daily power demand prediction module is used to monitor the current power supply corresponding to the AC charging pile and the DC charging pile in real time during the operation of the charging station, and extract the charging orders to be fulfilled corresponding to the AC charging pile and the DC charging pile in real time, and then predict the daily power demand corresponding to the AC charging pile and the DC charging pile.

[0006] Further preferably, the specific operation process of allocating the daily power supply of the DC charging pile and the AC charging pile is: importing the storage power of the energy storage battery at night, the single-day tendency power supply corresponding to the AC charging pile and the DC charging pile into the allocation model, wherein the storage power of the energy storage battery at night is represented as the daily allocated power supply corresponding to the DC charging pile and the AC charging pile, respectively.

[0007] Further preferably, the distribution network module includes a distribution network and a smart grid, a first end of the smart grid is connected to a first end of the distribution network and a first end of the third capacitor, and a second end of the smart grid is connected to a second end of the distribution network and a first end of the fourth capacitor.

[0008] Further preferably, the energy storage control module includes an energy storage device, a second inductor, a second resistor, a third power tube, a second power tube, a second diode, a second capacitor, and a third diode.

[0009] Further preferably, the specific implementation process of the power supply allocation control is as follows: substituting the daily allocated power supply and the daily demand power supply corresponding to the DC charging pile and the AC charging pile into the power supply allocation mode identification algorithm to obtain the power supply allocation mode.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] In the present invention, the control converter control module performs AC-DC conversion and regulation processing on the distribution network module, as well as energy storage and discharge control on the energy storage control module, so as to complete the energy storage of the energy storage control module and the complementary power supply control of the charging pile module with the distribution network module. At the same time, the power judgment module is coordinated to judge the state of the energy storage control module, so that when the energy storage control module is not fully stored, the intelligent control module controls the power distribution control module to receive the power generated by the photovoltaic in the charging pile system, and when the energy storage is full, controls the photovoltaic regulation module to supply power to the charging pile system, thereby improving the utilization rate of photovoltaic power, reducing power transmission loss and ensuring photovoltaic power supply demand.

[0012] In the present invention, when the energy storage battery is connected to the grid with surplus power, an effective grid connection timing analysis is performed based on the consideration of the basic grid connection conditions, so that the grid connection is implemented at the effective grid connection moment, thereby improving the grid connection effect by reducing the difficulty of operating the photovoltaic inverter, and at the same time helping to extend the working life of the photovoltaic inverter. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Schematic diagram of the connection of the system of the present invention Figure 1 ;

[0014] Figure 2 Schematic diagram of the connection of the system of the present invention Figure 2 ;

[0015] Figure 3 It is a schematic block diagram of the principle of the present invention. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the present invention.

[0017] See also Figure 1 - Figure 3 The present invention provides a technical solution: a photovoltaic energy storage integrated system, the system comprises a photovoltaic power generation module, a photovoltaic energy storage module, a photovoltaic energy storage distribution module, a photovoltaic regulation module, a photovoltaic energy storage control module, an intelligent control module, a distribution network module, a charging pile module, an AC control module and a power supply allocation control module, the intelligent control module is connected to the photovoltaic regulation module, and is used to output a first pulse signal and adjust the electric energy output by the voltage regulation circuit, to output a second pulse signal and control the operation of the energy storage control module, to output a third pulse signal and control the operation of the current conversion control module, and to output a fourth pulse signal and a fifth pulse signal according to the signal output by the electric energy judgment module. The power distribution control module is connected to the intelligent control module and the photovoltaic regulation module, and is used to receive the electric energy generated by the photovoltaic in the charging pile system and regulate the current through the fourth pulse signal to regulate the current of the current regulation circuit, and is used to control the operation of the bidirectional DC-DC circuit through the fifth pulse signal, and is used to transmit the electric energy after current regulation to the energy storage control module of the nearby charging pile through the bidirectional DC-DC circuit for charging. The bidirectional DC-DC circuit is also used to control the electric energy of the charging pile system to be input into the charging pile module.

[0018] In this embodiment, Figure 1 and Figure 2 As shown, the photovoltaic energy storage module is used to obtain the daytime power generation of the photovoltaic power generation component, and then compare it with the energy storage capacity of the energy storage battery. When the daytime power generation of the photovoltaic power generation component is not greater than the energy storage capacity of the energy storage battery, the daytime power generation of the photovoltaic power generation component is stored in the energy storage battery at night, and at the same time, the surplus power generation of the photovoltaic power generation component is connected to the grid. The daily demand power supply prediction module is used to monitor the current power supply corresponding to the AC charging pile and the DC charging pile in real time during the operation of the charging station, and extract the charging orders to be fulfilled corresponding to the AC charging pile and the DC charging pile in real time, and then predict the daily demand power supply corresponding to the AC charging pile and the DC charging pile.

[0019] In this embodiment, Figure 1 , Figure 2 and Figure 3As shown in the figure, the specific operation process of allocating the daily power supply of DC charging piles and AC charging piles is: the storage power of the energy storage battery at night, the daily tendency power supply corresponding to the AC charging pile and the DC charging pile are imported into the allocation model, where is represented by the storage power of the energy storage battery at night, and is represented by the daily allocated power supply corresponding to the DC charging pile and the AC charging pile, respectively.

[0020] In this embodiment, Figure 1 , Figure 2 and Figure 3 As shown, the distribution network module includes a distribution network and a smart grid, the first end of the smart grid is connected to the first end of the distribution network and the first end of the third capacitor, and the second end of the smart grid is connected to the second end of the distribution network and the first end of the fourth capacitor.

[0021] In this embodiment, Figure 1 , Figure 2 and Figure 3 As shown, the energy storage control module includes an energy storage device, a second inductor, a second resistor, a third power tube, a second power tube, a second diode, a second capacitor, and a third diode.

[0022] In this embodiment, Figure 1 , Figure 2 and Figure 3 As shown, the specific implementation process of power supply dispatch control is as follows: the daily allocated power supply and the daily demand power supply corresponding to the DC charging pile and the AC charging pile are substituted into the power supply dispatch mode identification algorithm to obtain the power supply dispatch mode.

[0023] The use method and advantages of the present invention: When the photovoltaic energy storage integrated system is used, the working process is as follows:

[0024] like Figure 1 , Figure 2 and Figure 3 As shown, when performing power supply allocation, the demand power supply of the DC charging pile and the AC charging pile on the day is predicted in real time, and then the daily allocated power supply and the daily demand power supply corresponding to the DC charging pile and the AC charging pile are combined, and the power supply allocation demand is judged in real time by comparing the results, so that the supply and demand matching status of the charging pile in the power supply process can be accurately grasped, thereby improving the timeliness of identifying the charging piles that lack the allocated power supply, realizing proactive power supply allocation, reserving a certain amount of time for power supply allocation, making the power supply allocation process more orderly and coordinated, and minimizing the allocation error rate. When the power supply allocation mode is the AC / DC intermodulation mode, the main allocation charging pile and the allocated charging pile are determined. The specific determination method is to use the charging pile whose daily demand power supply is less than the daily allocated power supply as the main allocation charging pile, and the charging pile whose daily demand power supply is greater than the daily allocated power supply as the allocated charging pile.

[0025] The above shows and describes the basic principles, main features and advantages of the present invention. Technical personnel in this industry should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A photovoltaic energy storage integrated system, characterized in that: The system comprises a photovoltaic power generation module, a photovoltaic energy storage module, a photovoltaic energy storage distribution module, a photovoltaic regulation module, a photovoltaic energy storage control module, an intelligent control module, a distribution network module, a charging pile module, an AC control module and a power supply allocation control module. The intelligent control module is connected to the photovoltaic regulation module, and is used to output a first pulse signal and adjust the electric energy output by the voltage regulation circuit, to output a second pulse signal and control the operation of the energy storage control module, to output a third pulse signal and control the operation of the current conversion control module, and to output a fourth pulse signal and a fifth pulse signal according to the signal output by the electric energy judgment module and control the distribution control module to perform Current regulation and bidirectional DC-DC transmission control, the power distribution control module includes a charging pile system, the charging pile system is a charging pile near the charging pile module, connected to the intelligent control module and the photovoltaic regulation module, used to receive the electric energy generated by the photovoltaic in the charging pile system and regulate the current through the fourth pulse signal to regulate the current regulation circuit, used to control the operation of the bidirectional DC-DC circuit through the fifth pulse signal, used to transmit the current-regulated electric energy to the energy storage control module of the nearby charging pile through the bidirectional DC-DC circuit for charging, and the bidirectional DC-DC circuit is also used to control the electric energy of the charging pile system to be input into the charging pile module.

2. A photovoltaic energy storage integrated system according to claim 1, characterized in that: The photovoltaic energy storage module is used to obtain the average daily power generation of the photovoltaic power generation component, and then compare it with the energy storage capacity of the energy storage battery. When the daytime power generation of the photovoltaic power generation component is not greater than the energy storage capacity of the energy storage battery, the daytime power generation of the photovoltaic power generation component is stored in the energy storage battery at night. Otherwise, the daytime power generation of the photovoltaic power generation component is connected to the grid. The daily power demand prediction module is used to monitor the current power supply corresponding to the AC charging pile and the DC charging pile in real time during the operation of the charging station, and extract the charging orders to be fulfilled corresponding to the AC charging pile and the DC charging pile in real time, and then predict the daily power demand corresponding to the AC charging pile and the DC charging pile.

3. The photovoltaic energy storage integrated system according to claim 1, characterized in that: The specific operation process of allocating the daily power supply of the DC charging pile and the AC charging pile is: importing the storage power of the energy storage battery at night and the single-day one-way power supply corresponding to the AC charging pile and the DC charging pile into the allocation model, where the storage power of the energy storage battery at night is represented by the daily allocated power supply corresponding to the DC charging pile and the AC charging pile, respectively.

4. The photovoltaic energy storage integrated system according to claim 1, characterized in that: The distribution network module includes a distribution network and a smart grid, wherein a first end of the smart grid is connected to a first end of the distribution network and a first end of a third capacitor, and a second end of the smart grid is connected to a second end of the distribution network and a first end of a fourth capacitor.

5. The photovoltaic energy storage integrated system according to claim 1, characterized in that: The energy storage control module includes an energy storage device, a second inductor, a second resistor, a third power tube, a second power tube, a second diode, a second capacitor, and a third diode.

6. The photovoltaic energy storage integrated system according to claim 1, characterized in that: The specific implementation process of the power supply allocation control is as follows: the daily allocated power supply and the daily required power supply corresponding to the DC charging pile and the AC charging pile are substituted into the power supply allocation mode identification algorithm to obtain the power supply allocation mode.

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