CN113689046A - Photovoltaic power generation intelligent energy storage system - Google Patents

Photovoltaic power generation intelligent energy storage system Download PDF

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CN113689046A
CN113689046A CN202111006225.4A CN202111006225A CN113689046A CN 113689046 A CN113689046 A CN 113689046A CN 202111006225 A CN202111006225 A CN 202111006225A CN 113689046 A CN113689046 A CN 113689046A
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褚富强
章韵
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Yancheng Big Data Research Center Of Nanjing University Of Posts And Telecommunications
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    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
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Abstract

The invention provides a photovoltaic power generation intelligent energy storage system, which comprises: the system comprises a photoelectric energy conversion module, a data acquisition module, a productivity prediction module, an electric energy storage module and a dynamic regulation and control module, wherein the photoelectric energy conversion module is used for converting solar energy into electric energy through a solar panel; the data acquisition module is used for acquiring working state data, line state information and weather forecast information of the solar panel; the capacity prediction module is used for predicting the generated energy according to the working state data and the weather forecast information to obtain a generated energy prediction result; the electric energy storage module is used for storing electric energy and feeding back energy storage state information; the dynamic regulation and control module is used for selecting the storage position of the electric energy according to the generated energy prediction result and the energy storage state information and selecting the power transmission line according to the line state information. By the method and the device, the storage position is intelligently selected, the electric energy transmission line is intelligently regulated and controlled, and the photovoltaic electric energy is intelligently stored.

Description

Photovoltaic power generation intelligent energy storage system
Technical Field
The invention relates to the field of photovoltaic power generation storage control, in particular to a photovoltaic power generation intelligent energy storage system.
Background
The solar cell panel directly or indirectly converts solar radiation energy into electric energy through a photoelectric effect or a photochemical effect mainly by absorbing sunlight. That is to say, the more solar radiation that solar cell panel receives, more electric energy can be more converted, therefore the output electric energy of solar energy component receives the influence of external illumination intensity very easily and the unstable condition of electric energy output appears, when carrying out electric energy storage, undulant electric energy output probably causes unnecessary damage to the circuit.
In the existing photovoltaic electric energy storage process, after photovoltaic electric energy is simply processed, the electric energy is often directly output through a power grid, but the following defects exist:
1. the electric energy storage position is fixed, and after a certain electric energy storage unit is full, another circuit cannot be switched timely to store electric energy, so that electric energy loss is caused;
2. the lack of a selection method for the electric energy output line often causes the situation that the same electric energy transmission line is crowded, and a parallel electric energy transmission line is too idle, so that certain damage is caused to the line under the situation that the transmission hardware resources are wasted.
Disclosure of Invention
The invention provides an intelligent energy storage system for photovoltaic power generation, which is used for solving the problems in the prior art background, and further intelligently selecting a storage position, intelligently regulating and controlling an electric energy transmission line and realizing intelligent storage of photovoltaic electric energy.
The invention provides a photovoltaic power generation intelligent energy storage system, which comprises: the system comprises a photoelectric energy conversion module, a data acquisition module, a capacity prediction module, an electric energy storage module and a dynamic regulation and control module;
the photoelectric energy conversion module is used for converting solar energy into electric energy through a solar panel;
the data acquisition module is used for acquiring working state data, line state information and weather forecast information of the plurality of solar panels;
the productivity prediction module is used for predicting the total electric energy production of the solar panels in a certain area according to the working state data and the weather forecast information to obtain an electric energy production prediction result;
the electric energy storage module is used for storing electric energy and feeding back energy storage state information;
and the dynamic regulation and control module is used for selecting the storage position of electric energy according to the generated energy prediction result and the energy storage state information and selecting the power transmission line according to the line state information.
Preferably, the data acquisition module includes:
the weather collection unit is used for collecting weather forecast information of the area where the solar panel is located through the Internet;
the working state data acquisition unit is used for acquiring the working state data of a single solar panel, wherein the working state data comprises the power generation power of the solar panel and the output voltage of the solar panel;
the line data acquisition unit is used for acquiring line state information of each section of line on the power grid, wherein the line state information comprises a line starting state and a line load condition.
Preferably, the capacity forecasting module comprises:
the illumination intensity analysis unit is used for determining the cloud cover degree of each time period of the area where the solar panel is located according to the weather forecast information, and determining the illumination intensity of the sunlight received by the ground solar panel in each time period in the future based on a preset relation table of the cloud cover degree and the illumination intensity;
the rate analysis unit is used for predicting the photoelectric capacity rate of a single solar panel, determining the corresponding relation between the power generation power and the illumination intensity of the solar panel according to the power generation power of a certain solar panel in a plurality of preset time periods and the illumination intensity of sunlight received by the solar panel in a corresponding preset time period, and further determining the photoelectric capacity rate of the solar panel under various illumination intensity levels;
the output prediction unit is used for determining the power generation power in each future time period based on the photoelectric capacity rate of the solar panel according to the illumination intensity of the sunlight received by the solar panel in each future time period, and further predicting the output electric quantity of the solar panel in each future time period;
and the capacity prediction unit is used for adding the output electric quantities predicted by the solar panels in the same time period in one area to obtain the total output electric quantity predicted by the area in each time period in the future, and taking the total output electric quantity as a power generation quantity prediction result.
Preferably, the mobile terminal further comprises a transmission module, wherein the transmission module comprises:
the electric energy sink node is connected with the plurality of photoelectric energy conversion modules and used for receiving electric energy generated by the photoelectric energy conversion modules, the electric energy sink node outputs the electric energy through a first output channel, the electric energy sink node is also connected with a standby sink node in parallel, and the standby sink node receives redundant electric energy when the electric energy sink node is overloaded and outputs the redundant electric energy through a second output channel;
the circuit intermediate node is connected with a plurality of input channels and a plurality of output channels and is used for outputting input electric energy after parallel flow or shunt flow;
the current coding unit is arranged at the output end of the electric energy aggregation node, the line middle node or the aggregation node and is used for generating electric energy characteristic codes by controlling the on-off of the output electric energy;
and the safety protection unit is arranged at the middle node of the circuit or the input end of the electric energy storage module and is used for carrying out safety certification on the source of the input electric energy through the electric energy characteristic code.
Preferably, the electrical energy storage module includes:
the storage amount detection unit is used for detecting the storage amount of the electric energy in the electric energy storage module and calculating the energy storage ratio of the storage amount to the maximum storage amount of the electric energy storage module;
the first analysis unit is used for comparing the energy storage ratio with a preset first threshold value, and when the energy storage ratio is lower than the first threshold value, the electric energy storage module is in an excess state of an energy storage space and can accept electric energy input;
the second analysis unit is used for comparing the energy storage ratio with a preset second threshold value, and when the energy storage ratio is higher than or equal to the second threshold value, the electric energy storage module is in an energy storage space oversaturation state, and the electric energy input needs to be immediately stopped and the extra electric energy is output;
and the third analysis unit is used for comparing the energy storage ratio with the first threshold and the second threshold, and when the energy storage ratio is higher than or equal to the first threshold and is lower than the second threshold, the third analysis unit indicates that the electric energy storage module is in a critical state and all electric energy needs to be input and distributed to other electric energy storage modules.
Preferably, the dynamic regulation module comprises:
the first regulation and control unit is used for prejudging the load condition of the electric energy aggregation node, starting the standby aggregation node when the overload condition of the electric energy aggregation node is determined, selecting a preset number of photoelectric energy conversion modules connected to the electric energy aggregation node, and connecting the output circuits of the photoelectric energy conversion modules to the standby aggregation node;
the second regulation and control unit is used for adjusting the unit identity of the electric energy storage module in real time according to the energy storage state information fed back by the electric energy storage module and adjusting the electric energy input and the electric energy output of the electric energy storage module in real time; the unit identity is an identity label, and the identity label is mapped with working modes of electric energy input and output;
the third regulating and controlling unit is used for selecting the power transmission line path according to the line state information and dispersedly conveying the electric energy from different sources in the line;
and the safety authentication unit is used for finishing the safety authentication work in the transmission module by controlling the current coding unit and the safety protection unit.
Preferably, the first regulatory unit performs the following operations:
step S100, taking the sum of the generated energy prediction results of a plurality of photoelectric energy conversion modules connected with the electric energy aggregation node as the electric energy prediction amount on the electric energy aggregation node;
step S101, when the predicted electric energy amount is larger than the corresponding preset electric energy capacity on the electric energy aggregation node, determining that the electric energy aggregation node is overloaded, and taking the difference value between the predicted electric energy amount and the electric energy capacity as surplus electric energy;
step S102, counting the generated energy prediction results of a plurality of photoelectric energy conversion modules connected to the electric energy aggregation node, and selecting the output electric quantity of one photoelectric energy conversion module as a shunt electric energy quantity;
step S103, judging the magnitude relation between the current shunt electric energy and the redundant electric energy;
step S104, when the shunt electric energy is smaller than the surplus electric energy, the total output electric quantity of another selected photoelectric energy conversion module from the remaining unselected photoelectric energy conversion modules on the electric energy aggregation node is added with the shunt electric energy to obtain new shunt electric energy;
and S105, circulating the steps S103 to S104 until the circulation process is finished when the shunt electric energy is larger than or equal to the redundant electric energy, and connecting the output lines of the selected multiple photoelectric energy conversion modules to the standby sink nodes.
Preferably, the second regulatory unit performs the following operations:
acquiring energy storage state information fed back by the electric energy storage module;
when the electric energy storage module is in an excess state of an energy storage space, marking the electric energy storage module as a first type unit, and allowing connection of a second type unit or a third type unit, wherein the second type unit comprises the electric energy aggregation node and the standby aggregation node, and the third type unit comprises the line intermediate node;
when the electric energy storage module is in an oversaturation state of an energy storage space, marking the electric energy storage module as a second type unit, sending a target transfer instruction to a plurality of second type units or third type units connected with the electric energy storage module, and selecting the first type unit or the third type unit to output electric energy;
when the electric energy storage module is in a critical state, the electric energy storage module is marked as a fourth type unit, a target transfer instruction is sent to a plurality of second type units or third type units connected with the electric energy storage module, and the electric energy storage module is disconnected from the plurality of first type units or third type units connected with the electric energy storage module
The second type of unit is used as an electric energy output unit, and the first type of unit or the third type of unit is bound to output electric energy;
the first type unit is used as an electric energy storage unit and can be connected with a plurality of second type units or third type units for electric energy input;
the third type of unit is used as an electric energy receiving unit, can be connected with a plurality of second type of units or third type of units for electric energy input, and can be connected with a plurality of third type of units or first type of units for electric energy output;
the fourth type of unit is taken as an independent unit, and the connection of all units is forbidden;
when the electric energy output unit or the electric energy receiving unit receives a target transfer instruction, an output channel connected with a unit sending the target transfer instruction is determined, and another third type unit or the first type unit is selected for the output channel to output electric energy.
Preferably, the third regulatory unit performs the following operations:
acquiring information of a starting point and an end point of electric energy transmission, and traversing all circuit paths between the starting point and the end point;
sequencing the circuit paths according to the lengths of the circuit paths to obtain a circuit path processing queue;
selecting the shortest circuit path in the circuit path processing queue and acquiring a plurality of units on the shortest circuit path;
determining the highest electric energy load of the line between two adjacent units to obtain the highest electric energy load of a plurality of sections of lines on the shortest circuit path;
adding the maximum output electric energy of the starting point of the electric energy transmission with the highest electric energy load of the plurality of sections of lines on the shortest circuit path respectively to obtain an electric energy load result of each section of lines on the shortest circuit path;
evaluating the shortest circuit path according to the electric energy load result of each section of line, and determining that the preview result of the shortest circuit path is unqualified when the electric energy load result on one or more sections of lines is higher than or equal to the maximum preset load capacity of the section of line; when the electric energy load result on each section of line is lower than the maximum preset load capacity of the section of line, determining that the preview result of the shortest circuit path is qualified;
when the preview result of the shortest circuit path shows unqualified, the shortest circuit path is removed from the circuit path processing queue, and a new shortest circuit path is selected from the circuit path processing queue again to preview the electric energy load result;
and stopping the preview when the preview result shows to be qualified, and selecting the circuit path corresponding to the preview result as the optimal distance circuit path.
Preferably, the security authentication unit performs the following operations:
step S200, acquiring a connection request sent by an electric energy output unit or an electric energy receiving unit;
step S201, determining a connection object with which a connection relation needs to be established according to the connection request;
step S202, randomly generating sequence feature codes when the connection object allows electric energy input connection;
step S203, the sequence feature code is sent to a current coding unit correspondingly arranged at the output end of the electric energy output unit or the electric energy receiving unit which sends the connection request, and meanwhile, the sequence feature code is sent to a safety protection unit correspondingly arranged at the input end of the connection object;
s204, controlling the current coding unit to carry out on-off control on the output electric energy according to the sequence feature code to generate an electric energy feature code;
step S205, controlling the safety protection unit to receive the electric energy feature code, matching the electric energy feature code with the internal sequence feature code, and allowing an electric energy output unit to establish connection when the electric energy feature code and the internal sequence feature code are completely matched; and refusing the power output unit to establish the connection when the two are not matched.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of an intelligent energy storage system for photovoltaic power generation according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating steps performed by the first control unit according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating steps performed by the security authentication unit according to an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
The invention provides a photovoltaic power generation intelligent energy storage system, as shown in figure 1, comprising: the system comprises a photoelectric energy conversion module 1, a data acquisition module 2, a capacity prediction module 3, an electric energy storage module 4 and a dynamic regulation and control module 5;
the photoelectric energy conversion module 1 is used for converting solar energy into electric energy through a solar panel;
the data acquisition module 2 is used for acquiring working state data, line state information and weather forecast information of the plurality of solar panels;
the productivity prediction module 3 is used for predicting the total electric energy production of the solar panels in a certain area according to the working state data and the weather forecast information to obtain an electric energy production prediction result;
the electric energy storage module 4 is used for storing electric energy and feeding back energy storage state information;
and the dynamic regulation and control module 5 is used for selecting a storage position of electric energy according to the generated energy prediction result and the energy storage state information and selecting a power transmission line according to the line state information.
The working principle and the beneficial effects of the technical scheme are as follows: the method comprises the steps of predicting the electric energy output of a plurality of solar panels in a certain area by acquiring the working state data of the solar panels, the state information of a line and weather forecast information, regulating and controlling the target storage place of the electric energy output according to the prediction result and the detected energy storage state of the electric energy storage module, selecting an electric energy storage module which is not full for electric energy output, realizing the high-efficiency distribution of electric energy storage positions, avoiding the loss of electric energy caused by improper distribution, evaluating the bearing capacity of the line according to the state information of the line in order to prevent the overload caused by too much electric energy transmitted by the same output line when the electric energy output is carried out, cutting off the electric energy input source of the line when the line is about to overload, selecting other lines for electric energy transmission by the electric energy input source, and not allowing the connection of new input lines, therefore, all transmission lines are effectively utilized while the circuit is not overloaded, the electric energy transmission efficiency is improved, and the overload fault of the circuit is avoided.
In a preferred embodiment, the data acquisition module comprises:
the weather collection unit is used for collecting weather forecast information of the area where the solar panel is located through the Internet;
the working state data acquisition unit is used for acquiring the working state data of a single solar panel, wherein the working state data comprises the power generation power of the solar panel and the output voltage of the solar panel;
and the line data acquisition unit is used for acquiring the line state information of each section of line on the power grid, wherein the line state information comprises a line starting state and a line load condition.
The working principle and the beneficial effects of the technical scheme are as follows: the weather forecast information of the area where the solar panel is located is collected through the Internet, so that the weather condition of the area in a period of time in the future can be conveniently predicted, and the illumination intensity change condition of the area can be further predicted; the method has the advantages that the working state data of a single solar panel are collected, the power generation power and the output voltage of the solar panel are determined, the electric energy output condition of the solar panel is convenient to predict, and the power transmission line is prevented from being burnt out due to the fact that the power transmission line bears overhigh electric energy or voltage input; the method and the device have the advantages that the line state information of each section of line on the power grid is acquired, and the starting state and the load condition of the line are determined, so that the line with less load is conveniently selected from the started lines for electric energy transmission, and the electric energy transmission burden of the line is reduced.
In a preferred embodiment, the capacity forecast module comprises:
the illumination intensity analysis unit is used for determining the cloud cover degree of each time period of the area where the solar panel is located according to weather forecast information, and determining the illumination intensity of sunlight received by the ground solar panel in each time period in the future based on a preset relation table of the cloud cover degree and the illumination intensity;
the rate analysis unit is used for predicting the photoelectric capacity rate of a single solar panel, determining the corresponding relation between the power generation power and the illumination intensity of the solar panel according to the power generation power of a certain solar panel in a plurality of preset time periods and the illumination intensity of sunlight received by the solar panel in a corresponding preset time period, and further determining the photoelectric capacity rate of the solar panel under various illumination intensity levels;
the output prediction unit is used for determining the power generation power in each future time period based on the photoelectric capacity rate of the solar panel according to the illumination intensity of the sunlight received by the solar panel in each future time period, and further predicting the output electric quantity of the solar panel in each future time period;
and the productivity prediction unit is used for adding the predicted output electric quantity of the plurality of solar panels in the same time period in one area to obtain the predicted total output electric quantity of the area in each time period in the future, and taking the total output electric quantity as the electric quantity prediction result.
The working principle and the beneficial effects of the technical scheme are as follows: analyzing weather forecast information to obtain cloud cover degree of an area where the solar panel is located, determining illumination intensity of sunlight received by the ground solar panel in each time period in the future according to a relation table of the cloud cover degree and the illumination intensity, further determining a corresponding relation between the power generation power and the illumination intensity of the solar panel in a plurality of preset time periods according to the power generation power of one solar panel in the preset time periods and the illumination intensity of the sunlight received by the solar panel in the corresponding preset time periods, and further determining the photoelectric capacity rate of the solar panel under different illumination levels, for example, when the solar panel is found in an interval with the illumination intensity of 5-6 Muller in a plurality of observations, the power generation power of the solar panel is 0.1 kilowatt/hour (m is m2) Therefore, the photoelectric capacity rates of the solar panel under different illumination levels are counted, furthermore, the change situation of the photoelectric capacity rate of the solar panel in a period of time in the future is determined based on the photoelectric capacity rates of the solar panel under different illumination levels by utilizing the prediction result of the illumination intensity change in the period of time in the future, so that the output electric quantity of the solar panel in the period of time in the future is obtained through integral operation, and the prediction of the output electric quantity of a single solar panel is scientifically realized.
In a preferred embodiment, the system further comprises a transmission module, wherein the transmission module comprises:
the electric energy sink node is connected with the photoelectric energy conversion modules and used for receiving electric energy generated by the photoelectric energy conversion modules, the electric energy sink node outputs the electric energy through a first output channel, the electric energy sink node is also connected with a standby sink node in parallel, and the standby sink node receives redundant electric energy when the electric energy sink node is overloaded and outputs the redundant electric energy through a second output channel;
the circuit intermediate node is connected with a plurality of input channels and a plurality of output channels and is used for outputting input electric energy after parallel flow or shunt flow;
the current coding unit is arranged at the output end of the electric energy sink node, the line middle node or the sink node and is used for generating electric energy characteristic codes by controlling the on-off of the output electric energy;
and the safety protection unit is arranged at the middle node of the line or the input end of the electric energy storage module and is used for carrying out safety certification on the source of the input electric energy through the electric energy characteristic code.
The working principle and the beneficial effects of the technical scheme are as follows: the electric energy convergence nodes are arranged, each electric energy convergence node can be connected with a plurality of photoelectric energy conversion modules and receives the simultaneous electric energy input of the photoelectric energy conversion modules, when the electric energy input quantity received by the electric energy aggregation node within a certain time is overlarge, the electric energy aggregation node is determined to be overloaded, and then the standby aggregation nodes connected in parallel are started to share the electric energy transmission work, by means of the main and standby nodes, the single-point overload problem can be effectively prevented, and the circuit is favorably expanded, when more photoelectric energy conversion modules need to be expanded, the input of the newly added photoelectric energy conversion modules can be directly connected to the electric energy aggregation node, when overload is found, the standby aggregation node is automatically started to carry out electric energy shunt transmission, when the two sink nodes are overloaded, the expansion work can be completed only by adding a new standby sink node in parallel. The circuit intermediate node is arranged to output the input electric energy after parallel flow or shunt, the selection of an electric energy transmission path and the shunt work in electric energy transmission can be completed through the circuit intermediate node, and the electric energy transmission amount in the circuit can be conveniently redistributed. The current coding unit is used for controlling the output electric energy, outputting the high and low levels which can be identified, directly carrying out effective communication through the control of the transmitted current, and combining the safety protection unit to realize safety certification through the electric energy coding and decoding modes. The method can effectively prevent the overload of the line caused by random access and transmission of external current without permission, realize the strict control of the electric energy input, prevent hackers from tampering the electric energy input object to a certain extent, and cause the damage of the overload caused by the fact that the line has a large amount of electric energy input at the same time.
In a preferred embodiment, the electrical energy storage module comprises:
the storage amount detection unit is used for detecting the storage amount of the electric energy in the electric energy storage module and calculating an energy storage ratio of the storage amount to the maximum storage amount of the electric energy storage module;
the first analysis unit is used for comparing the energy storage ratio with a preset first threshold value, and when the energy storage ratio is lower than the first threshold value, the electric energy storage module is in an excess state of the energy storage space and can accept electric energy input;
the second analysis unit is used for comparing the energy storage ratio with a preset second threshold value, when the energy storage ratio is higher than or equal to the second threshold value, the electric energy storage module is in an energy storage space oversaturation state, the electric energy input needs to be stopped immediately, and meanwhile, the excessive electric energy is output;
and the third analysis unit is used for comparing the energy storage ratio with the first threshold and the second threshold, and when the energy storage ratio is higher than or equal to the first threshold and lower than the second threshold, the electric energy storage module is in a critical state, and all electric energy needs to be input and distributed to other electric energy storage modules.
The working principle and the beneficial effects of the technology are as follows: the storage capacity is detected, the occupied proportion of the existing storage capacity is reflected according to the energy storage ratio, whether the electric energy storage module has excessive residual space and is not used is analyzed through the first analysis unit, the electric energy storage module can be opened to the outside when the electric energy storage module is detected to be in the excess state of the energy storage space, electric energy input is received, other electric energy output units can apply for connection when the electric energy storage module is detected to be in the excess state, and electric energy is input to the electric energy storage module. Whether the electric energy storage module is in a saturated state or not is analyzed through the second analysis unit, all electric energy input needs to be stopped immediately when the electric energy storage module is in the saturated state, and meanwhile, supersaturated partial electric energy is conveyed out, so that the damage caused by over-saturation irradiation of the internal space of the electric energy storage module is prevented. Whether the electric energy storage module is in a critical state or not is analyzed through the third analysis unit, the critical state is a buffer state between an excess state and a saturated state, when the electric energy storage module is in the critical state, more electric energy input addition is stopped, meanwhile, the existing electric energy input is slowly divided, the electric energy storage module can have a buffer period by setting the critical state, and the situation that a plurality of electric energy input additions exist at the moment of being in the saturated state, so that electric energy impact is caused to the electric energy storage module, and the electric energy storage module is damaged is prevented.
In a preferred embodiment, the dynamic regulation module comprises:
the first regulation and control unit is used for prejudging the load condition of the electric energy sink node, starting a standby sink node when the overload condition of the electric energy sink node is determined, selecting a preset number of photoelectric energy conversion modules connected to the electric energy sink node, and connecting the output circuits of the photoelectric energy conversion modules to the standby sink node;
the second regulation and control unit is used for adjusting the unit identity of the electric energy storage module in real time according to the energy storage state information fed back by the electric energy storage module and adjusting the electric energy input and the electric energy output of the electric energy storage module in real time; the unit identity is an identity label, and the identity label is mapped with working modes of electric energy input and output;
the third regulating and controlling unit is used for selecting the power transmission line path according to the line state information and dispersedly conveying the electric energy from different sources in the line;
and the safety authentication unit is used for finishing the safety authentication work in the transmission module by controlling the current coding unit and the safety protection unit.
The working principle and the beneficial effects of the technical scheme are as follows: switch the reposition of redundant personnel through the primary and secondary nodes of first regulation and control unit electric energy convergent node to the electric energy input of adaptation change, prevent that too big electric energy input from causing the impact to convergent node, through the second regulation and control unit, adjust the unit identity of electric energy storage module in real time, correspond the input/output working method of electric energy storage module based on predetermined unit identity, thereby realize adjusting in real time electric energy input and electric energy output to electric energy storage module, through the third regulation and control unit, select the circuit of electric energy transport according to the status information of circuit, with electric energy dispersion transmission, prevent that same section circuit from undertaking too high electric energy input and causing the damage. Through the safety certification unit, the direct communication with strong electricity is realized, the safety certification is directly carried out through electric energy, the electric energy is allowed to be accessed after the certification is passed, and the safe transmission of the electric energy is ensured.
In a preferred embodiment, as shown in fig. 2, the first regulatory unit performs the following operations:
step S100, taking the sum of the generated energy prediction results of a plurality of photoelectric energy conversion modules connected with the electric energy aggregation node as the electric energy prediction amount on the electric energy aggregation node;
step S101, when the predicted electric energy amount is larger than the corresponding preset electric energy capacity on the electric energy aggregation node, determining that the electric energy aggregation node is overloaded, and taking the difference value between the predicted electric energy amount and the electric energy capacity as surplus electric energy;
step S102, counting the generated energy prediction results of a plurality of photoelectric energy conversion modules connected to the electric energy aggregation node, and selecting the output electric quantity of one of the photoelectric energy conversion modules as the shunt electric energy;
step S103, judging the magnitude relation between the current shunt electric energy and the redundant electric energy;
step S104, when the shunt electric energy is less than the surplus electric energy, the total output electric quantity of another selected photoelectric energy conversion module from the remaining unselected photoelectric energy conversion modules on the electric energy aggregation node is added with the shunt electric energy to obtain new shunt electric energy;
and S105, circulating the steps S103 to S104 until the circulation process is finished when the shunt electric energy is larger than or equal to the redundant electric energy, and connecting the output lines of the selected multiple photoelectric energy conversion modules to the standby sink nodes.
The working principle and the beneficial effects of the technical scheme are as follows: the sum of the generated energy prediction results of a plurality of photoelectric energy conversion modules connected with the electric energy aggregation node is used as the electric energy prediction quantity on the electric energy aggregation node, the electric energy prediction quantity is compared with the electric energy capacity born by the electric energy aggregation node, when the predicted electric energy amount is larger than the electric energy capacity, the electric energy aggregation node cannot bear so much electric energy, a plurality of photoelectric energy conversion modules connected with the electric energy aggregation node need to be distributed to standby aggregation nodes, and during selection, circularly counting the size of the split electric energy of the selected photoelectric energy conversion modules, when the split electric energy is larger than or equal to the redundant electric energy, indicating that the rest electric energy except the split electric energy is within the bearing range of the electric energy sink node, finishing the circulation, and connecting the output circuits of the selected plurality of photoelectric energy conversion modules to the standby sink node. The intelligent starting of the standby sink nodes is realized, and the energy storage efficiency of the energy storage system is improved.
In a preferred embodiment, the second regulatory unit performs the following operations:
acquiring energy storage state information fed back by the electric energy storage module;
when the electric energy storage module is in an excess state of the energy storage space, marking the electric energy storage module as a first type unit, and allowing connection of a second type unit or a third type unit, wherein the second type unit comprises an electric energy aggregation node and a standby aggregation node, and the third type unit comprises a line intermediate node;
when the electric energy storage module is in an oversaturation state of an energy storage space, marking the electric energy storage module as a second type unit, sending a target transfer instruction to a plurality of second type units or third type units connected with the electric energy storage module, and selecting the first type unit or the third type unit to output electric energy;
when the electric energy storage module is in a critical state, the electric energy storage module is marked as a fourth type unit, a target transfer instruction is sent to a plurality of second type units or third type units connected with the electric energy storage module, and the electric energy storage module is disconnected from the plurality of first type units or third type units connected with the electric energy storage module simultaneously
The second type of unit is used as an electric energy output unit, and the first type of unit or the third type of unit is bound to output electric energy;
the first type unit is used as an electric energy storage unit and can be connected with a plurality of second type units or third type units for electric energy input;
the third type of unit is used as an electric energy receiving unit, can be connected with a plurality of second type of units or third type of units for electric energy input, and can be connected with a plurality of third type of units or first type of units for electric energy output;
the fourth type of unit is taken as an independent unit, and the connection of all units is forbidden;
when the electric energy output unit or the electric energy receiving unit receives the target transfer instruction, an output channel connected with the unit sending the target transfer instruction is determined, and another third type unit or the first type unit is selected for the output channel to output electric energy.
The working principle and the beneficial effects of the technical scheme are as follows: the electric energy storage module, the electric energy aggregation node, the standby aggregation node and the line intermediate node are divided into units according to the input and output working modes, the working contents of the units in different types are different, different unit types are given to the electric energy storage module in different energy storage states, the electric energy storage module can work in different types in different states, the unit types of the electric energy storage module can be switched in real time, and the input and the electric energy output of the electric energy storage module can be automatically adjusted in real time.
In a preferred embodiment, the third regulatory unit performs the following operations:
acquiring information of a starting point and an end point of electric energy transmission, and traversing all circuit paths between the starting point and the end point;
sequencing the circuit paths according to the lengths of the circuit paths to obtain a circuit path processing queue;
selecting the shortest circuit path in the circuit path processing queue and acquiring a plurality of units on the shortest circuit path;
determining the highest electric energy load of the line between two adjacent units to obtain the highest electric energy load of a plurality of sections of lines on the shortest circuit path;
adding the maximum output electric energy of the starting point of the electric energy transmission with the highest electric energy load of the plurality of sections of lines on the shortest circuit path respectively to obtain an electric energy load result of each section of lines on the shortest circuit path;
evaluating the shortest circuit path according to the electric energy load result of each section of line, and determining that the preview result of the shortest circuit path is unqualified when the electric energy load result on one or more sections of lines is higher than or equal to the maximum preset load capacity of the section of line; when the electric energy load result on each section of line is lower than the maximum preset load capacity of the section of line, determining that the preview result of the shortest circuit path is qualified;
when the preview result of the shortest circuit path shows unqualified, the shortest circuit path is removed from the circuit path processing queue, and a new shortest circuit path is selected from the circuit path processing queue again to preview the electric energy load result;
and stopping the preview when the preview result shows to be qualified, and selecting the circuit path corresponding to the preview result as the optimal circuit path.
The working principle and the beneficial effects of the technical scheme are as follows: when the circuit path with the optimal distance is selected, the nearest circuit path is selected under the condition that the circuit is not overloaded, all circuit paths are listed through the circuit paths among all units, all the circuit paths are sequenced according to the path length to obtain a circuit path processing queue, the circuit paths are conveniently selected for previewing according to the sequence from the shortest path to the largest path, the shortest circuit path in the circuit path processing queue is selected, the value of the maximum output electric energy is added to the shortest circuit path to perform superposition previewing of the electric energy, the size of the transmitted electric energy after superposition is predicted by utilizing superposition of the maximum output electric energy and the existing circuit electric energy load, and the circuit can be effectively prevented from being damaged due to overload caused by overhigh electric energy input by the circuit. Judging whether a road section with electric energy overload exists on the shortest circuit path or not, obtaining a previewing result with qualified performance when the road section with qualified performance does not exist, indicating that the shortest path can bear the superposition of corresponding electric energy without damaging the circuit when the road section with qualified performance is qualified, selecting the circuit path corresponding to the previewing result as an optimal circuit path, obtaining a previewing result with unqualified performance when the road section with qualified performance is existed, eliminating the previewed shortest circuit path from the circuit path processing queue at this time, selecting a new shortest circuit path from the circuit path processing queue for previewing again until the previewing result is qualified, previewing all circuit paths in the circuit path processing queue according to strict length sequence, and effectively preventing repeated previewing on the same circuit for many times.
In a preferred embodiment, as in fig. 3, the security authentication unit performs the following operations:
step S200, acquiring a connection request sent by an electric energy output unit or an electric energy receiving unit;
step S201, determining a connection object with which a connection relation needs to be established according to the connection request;
step S202, randomly generating sequence feature codes when the connection object allows electric energy input connection;
step S203, sending the sequence feature code to a current coding unit correspondingly arranged at the output end of the electric energy output unit or the electric energy receiving unit which sends the connection request, and simultaneously sending the sequence feature code to a safety protection unit correspondingly arranged at the input end of the connection object;
s204, controlling the current coding unit to carry out on-off control on the output electric energy according to the sequence feature code to generate an electric energy feature code;
step S205, controlling the safety protection unit to receive the electric energy feature code, and matching the electric energy feature code with the internal sequence feature code, wherein the matching process is as follows:
the sequence character set in the electric energy characteristic code A is expressed as
Figure BDA0003237297320000171
naCoding the number of sequence characters in the A for the electric energy characteristics; let the set of sequence characters in the sequence feature code B be represented as
Figure BDA0003237297320000172
nbCoding the number of sequence characters in the B for the sequence characteristics;
calculating the s-th sequence character f in the electric energy characteristic code AA,sWith the kth sequence character f in the sequence feature code BB,kEuclidean distance between: d (f)A,s，fB,k)＝norm(feaA,s，feaB,k)
Wherein s is 1,2,3a，k＝1,2,3,...,nb，feaA,s，feaB,kAre respectively a sequence character fA,sAnd fB,kFeature vector of (2), norm (fea)A,s，feaB,k) Expression finding vector feaA,sAnd fea B,k2 norm of the difference;
euclidean distance d (f)A,s，fB,k)<A first threshold value T is used for judging that the electric energy feature code is matched with the internal sequence feature code;
when the two are matched, the electric energy output units are allowed to establish connection; and refusing the power output unit to establish the connection when the two are not matched.
The working principle and the beneficial effects of the technical scheme are as follows: acquiring a connection request sent by an electric energy output unit or an electric energy receiving unit, determining a connection object needing to establish a connection relation with the connection request, and randomly generating a sequence feature code when the connection object allows electric energy input connection; the sequence feature code is sent to a current coding unit correspondingly arranged at the output end of an electric energy output unit or an electric energy receiving unit which sends a connection request, and simultaneously the sequence feature code is sent to a safety protection unit correspondingly arranged at the input end of a connection object, so that the two parties can hold the same set of codes for safety certification, the current coding unit is controlled to carry out on-off control on the output electric energy according to the sequence feature code to generate the electric energy feature code, the electric energy feature code which can directly reach the safety protection unit correspondingly arranged on the connection object is directly generated by changing the output waveform of the electric energy, the safety protection unit is controlled to receive the electric energy feature code, the electric energy feature code is matched with the internal sequence feature code, the direct coding by the electric energy in the electric energy transmission process is realized to realize access certification, and the safety certification is directly carried out through the electric energy, the power access is allowed after the authentication is passed, so that the condition that a hacker invades and calls excessive power input to damage a circuit is prevented.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (10)

1. The utility model provides a photovoltaic power generation intelligence energy storage system which characterized in that includes: the system comprises a photoelectric energy conversion module, a data acquisition module, a capacity prediction module, an electric energy storage module and a dynamic regulation and control module;
the photoelectric energy conversion module is used for converting solar energy into electric energy through a solar panel;
the data acquisition module is used for acquiring working state data, line state information and weather forecast information of the plurality of solar panels;
the productivity prediction module is used for predicting the total electric energy production of the solar panels in a certain area according to the working state data and the weather forecast information to obtain an electric energy production prediction result;
the electric energy storage module is used for storing electric energy and feeding back energy storage state information;
and the dynamic regulation and control module is used for selecting the storage position of electric energy according to the generated energy prediction result and the energy storage state information and selecting the power transmission line according to the line state information.
2. The intelligent energy storage system for photovoltaic power generation according to claim 1, wherein the data acquisition module comprises:
the weather collection unit is used for collecting weather forecast information of the area where the solar panel is located through the Internet;
the working state data acquisition unit is used for acquiring the working state data of a single solar panel, wherein the working state data comprises the power generation power of the solar panel and the output voltage of the solar panel;
the line data acquisition unit is used for acquiring line state information of each section of line on the power grid, wherein the line state information comprises a line starting state and a line load condition.
3. The intelligent energy storage system for photovoltaic power generation according to claim 1, wherein the capacity prediction module comprises:
the illumination intensity analysis unit is used for determining the cloud cover degree of each time period of the area where the solar panel is located according to the weather forecast information, and determining the illumination intensity of the sunlight received by the ground solar panel in each time period in the future based on a preset relation table of the cloud cover degree and the illumination intensity;
the rate analysis unit is used for determining the corresponding relation between the generating power and the illumination intensity of the solar panel according to the generating power of a certain solar panel in a plurality of preset time periods and the illumination intensity of sunlight received by the solar panel in the corresponding preset time period, and further determining the photoelectric capacity rate of the solar panel under various illumination intensity levels;
the output prediction unit is used for determining the power generation power in each future time period based on the photoelectric capacity rate of the solar panel according to the illumination intensity of the sunlight received by the solar panel in each future time period, and further predicting the output electric quantity of the solar panel in each future time period;
and the capacity prediction unit is used for adding the output electric quantities predicted by the solar panels in the same time period in one area to obtain the total output electric quantity predicted by the area in each time period in the future, and taking the total output electric quantity as a power generation quantity prediction result.
4. The intelligent energy storage system for photovoltaic power generation according to claim 1, further comprising a transmission module, wherein the transmission module comprises:
the electric energy sink node is connected with the plurality of photoelectric energy conversion modules and used for receiving electric energy generated by the photoelectric energy conversion modules, the electric energy sink node outputs the electric energy through a first output channel, the electric energy sink node is also connected with a standby sink node in parallel, and the standby sink node receives redundant electric energy when the electric energy sink node is overloaded and outputs the redundant electric energy through a second output channel;
the circuit intermediate node is connected with a plurality of input channels and a plurality of output channels and is used for outputting input electric energy after parallel flow or shunt flow;
the current coding unit is arranged at the output end of the electric energy aggregation node, the line middle node or the standby aggregation node and is used for generating an electric energy characteristic code by controlling the on-off of the output electric energy;
and the safety protection unit is arranged at the middle node of the circuit or the input end of the electric energy storage module and is used for carrying out safety certification on the source of the input electric energy through the electric energy characteristic code.
5. The intelligent energy storage system for photovoltaic power generation according to claim 1, wherein the electric energy storage module comprises:
the storage amount detection unit is used for detecting the storage amount of the electric energy in the electric energy storage module and calculating the energy storage ratio of the storage amount to the maximum storage amount of the electric energy storage module;
the first analysis unit is used for comparing the energy storage ratio with a preset first threshold value, and when the energy storage ratio is lower than the first threshold value, the electric energy storage module is in an excess state of an energy storage space and can accept electric energy input;
the second analysis unit is used for comparing the energy storage ratio with a preset second threshold value, and when the energy storage ratio is higher than or equal to the second threshold value, the electric energy storage module is in an energy storage space oversaturation state, and the electric energy input needs to be immediately stopped and the extra electric energy is output;
and the third analysis unit is used for comparing the energy storage ratio with the first threshold and the second threshold, and when the energy storage ratio is higher than or equal to the first threshold and is lower than the second threshold, the third analysis unit indicates that the electric energy storage module is in a critical state and all electric energy needs to be input into the electric energy storage module to be distributed to other electric energy storage modules.
6. The intelligent energy storage system for photovoltaic power generation according to claim 4, wherein the dynamic regulation and control module comprises:
the first regulation and control unit is used for prejudging the load condition of the electric energy aggregation node, starting the standby aggregation node when the overload condition of the electric energy aggregation node is determined, selecting a preset number of photoelectric energy conversion modules connected to the electric energy aggregation node, and connecting the output circuits of the photoelectric energy conversion modules to the standby aggregation node;
the second regulation and control unit is used for adjusting the unit identity of the electric energy storage module in real time according to the energy storage state information fed back by the electric energy storage module and adjusting the electric energy input and the electric energy output of the electric energy storage module in real time; the unit identity is an identity label, and the identity label is mapped with working modes of electric energy input and output;
the third regulating and controlling unit is used for selecting the power transmission line path according to the line state information and dispersedly conveying the electric energy from different sources in the line;
and the safety authentication unit is used for finishing the safety authentication work in the transmission module by controlling the current coding unit and the safety protection unit.
7. The intelligent energy storage system for photovoltaic power generation according to claim 6, wherein the first regulation and control unit performs the following operations:
step S100, taking the sum of the generated energy prediction results of a plurality of photoelectric energy conversion modules connected with the electric energy aggregation node as the electric energy prediction amount on the electric energy aggregation node;
step S101, when the predicted electric energy amount is larger than the corresponding preset electric energy capacity on the electric energy aggregation node, determining that the electric energy aggregation node is overloaded, and taking the difference value between the predicted electric energy amount and the electric energy capacity as surplus electric energy;
step S102, counting the generated energy prediction results of a plurality of photoelectric energy conversion modules connected to the electric energy aggregation node, and selecting the output electric quantity of one photoelectric energy conversion module as a shunt electric energy quantity;
step S103, judging the magnitude relation between the current shunt electric energy and the redundant electric energy;
step S104, when the shunt electric energy is smaller than the surplus electric energy, the total output electric quantity of another selected photoelectric energy conversion module from the remaining unselected photoelectric energy conversion modules on the electric energy aggregation node is added with the shunt electric energy to obtain new shunt electric energy;
and S105, circulating the steps S103 to S104 until the circulation process is finished when the shunt electric energy is larger than or equal to the redundant electric energy, and connecting the output lines of the selected multiple photoelectric energy conversion modules to the standby sink nodes.
8. The intelligent energy storage system for photovoltaic power generation according to claim 6, wherein the second control unit performs the following operations:
acquiring energy storage state information fed back by the electric energy storage module;
when the electric energy storage module is in an excess state of an energy storage space, marking the electric energy storage module as a first type unit, and allowing connection of a second type unit or a third type unit, wherein the second type unit comprises the electric energy aggregation node and the standby aggregation node, and the third type unit comprises the line intermediate node;
when the electric energy storage module is in an oversaturation state of an energy storage space, marking the electric energy storage module as a second type unit, sending a target transfer instruction to a plurality of second type units or third type units connected with the electric energy storage module, and selecting the first type unit or the third type unit to output electric energy;
when the electric energy storage module is in a critical state, the electric energy storage module is marked as a fourth type unit, a target transfer instruction is sent to a plurality of second type units or third type units connected with the electric energy storage module, and the electric energy storage module is disconnected from the plurality of first type units or third type units connected with the electric energy storage module
The second type of unit is used as an electric energy output unit, and the first type of unit or the third type of unit is bound to output electric energy;
the first type unit is used as an electric energy storage unit and can be connected with a plurality of second type units or third type units for electric energy input;
the third type of unit is used as an electric energy receiving unit, can be connected with a plurality of second type of units or third type of units for electric energy input, and can be connected with a plurality of third type of units or first type of units for electric energy output;
the fourth type of unit is taken as an independent unit, and the connection of all units is forbidden;
when the electric energy output unit or the electric energy receiving unit receives a target transfer instruction, an output channel connected with a unit sending the target transfer instruction is determined, and another third type unit or the first type unit is selected for the output channel to output electric energy.
9. The intelligent energy storage system for photovoltaic power generation according to claim 6, wherein the third regulation and control unit performs the following operations:
acquiring information of a starting point and an end point of electric energy transmission, and traversing all circuit paths between the starting point and the end point;
sequencing the circuit paths according to the lengths of the circuit paths to obtain a circuit path processing queue;
selecting the shortest circuit path in the circuit path processing queue and acquiring a plurality of units on the shortest circuit path;
determining the highest electric energy load of the line between two adjacent units to obtain the highest electric energy load of a plurality of sections of lines on the shortest circuit path;
adding the maximum output electric energy of the starting point of the electric energy transmission with the highest electric energy load of the plurality of sections of lines on the shortest circuit path respectively to obtain an electric energy load result of each section of lines on the shortest circuit path;
evaluating the shortest circuit path according to the electric energy load result of each section of line, and determining that the preview result of the shortest circuit path is unqualified when the electric energy load result on one or more sections of lines is higher than or equal to the maximum preset load capacity of the section of line; when the electric energy load result on each section of line is lower than the maximum preset load capacity of the section of line, determining that the preview result of the shortest circuit path is qualified;
when the preview result of the shortest circuit path shows unqualified, the shortest circuit path is removed from the circuit path processing queue, and a new shortest circuit path is selected from the circuit path processing queue again to preview the electric energy load result;
and stopping the preview when the preview result shows to be qualified, and selecting the circuit path corresponding to the preview result as the optimal circuit path.
10. The intelligent energy storage system for photovoltaic power generation according to claim 6, wherein the safety certification unit performs the following operations:
step S200, acquiring a connection request sent by an electric energy output unit or an electric energy receiving unit;
step S201, determining a connection object with which a connection relation needs to be established according to the connection request;
step S202, randomly generating sequence feature codes when the connection object allows electric energy input connection;
step S203, the sequence feature code is sent to a current coding unit correspondingly arranged at the output end of the electric energy output unit or the electric energy receiving unit which sends the connection request, and meanwhile, the sequence feature code is sent to a safety protection unit correspondingly arranged at the input end of the connection object;
s204, controlling the current coding unit to carry out on-off control on the output electric energy according to the sequence feature code to generate an electric energy feature code;
step S205, controlling the safety protection unit to receive the electric energy feature code, matching the electric energy feature code with the internal sequence feature code, and allowing an electric energy output unit to establish connection when the electric energy feature code and the internal sequence feature code are completely matched; and refusing the power output unit to establish the connection when the two are not matched.
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CN115173399B (en) * 2022-06-22 2024-10-22 大航有能电气有限公司 Flexible distribution network power supply system based on photovoltaic energy storage
CN116031951A (en) * 2023-02-03 2023-04-28 国网安徽省电力有限公司营销服务中心 Distributed photovoltaic power generation shunt management system based on virtual power plant
CN116031951B (en) * 2023-02-03 2023-10-13 国网安徽省电力有限公司营销服务中心 Distributed photovoltaic power generation shunt management system based on virtual power plant
CN116667475A (en) * 2023-03-13 2023-08-29 深圳库博能源科技有限公司 Energy storage management system and method based on cloud computing
CN116667475B (en) * 2023-03-13 2024-05-07 深圳库博能源科技有限公司 Energy storage management system and method based on cloud computing

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Application publication date: 20211123