Fused salt energy storage method and system for photovoltaic peak regulation and back pressure unit heat supply

Abstract

The invention relates to the technical field of energy storage, and discloses a fused salt energy storage method and system for photovoltaic peak regulation and back pressure unit heat supply, and the method comprises the steps: setting monitoring points at a photovoltaic power generation end and a heat supply pipe network end, and obtaining the monitoring data of the monitoring points; whether redundant electric energy exists or not is judged, the redundant electric energy is converted into heat energy through fused salt energy storage conversion, and the redundant heat energy is stored; judging according to a user load demand of a power supply network, and supplying heat by using the stored heat energy; and according to the real-time load requirement and the fused salt energy storage state, the heat supply scheme is dynamically adjusted and optimized. According to the system, the stable output and peak regulation functions of photovoltaic energy are achieved, the advantages of the fused salt energy storage technology are fully utilized, electric energy and heat energy are effectively combined, the energy utilization efficiency is improved, the system cost is reduced, and a new solution is provided for the fields of photovoltaic peak regulation and back pressure unit heat supply.

Description

Technical Field

[0001] The present invention relates to the field of energy storage technology, and in particular to a molten salt energy storage method and system for photovoltaic peak regulation and back pressure unit heating. Background Art

[0002] With the continuous growth of global energy demand and the improvement of environmental protection awareness, clean energy technology, especially solar photovoltaic power generation technology, has been rapidly developed and widely used. However, the output of photovoltaic energy is affected by many factors such as light intensity and weather conditions, and is unstable and intermittent, which poses a challenge to the stable operation of the power grid. In order to solve this problem, people have proposed a variety of energy storage and peak-shaving technologies, among which molten salt energy storage technology has attracted much attention due to its unique energy storage mechanism and high efficiency.

[0003] Molten salt energy storage technology mainly utilizes the high heat capacity and fluidity of molten salt to convert electrical energy into thermal energy and store it in molten salt, and releases the thermal energy into electrical energy or thermal energy through a heat exchanger when needed. This energy storage method not only has the advantages of high energy storage density and low energy loss, but also can realize two-way conversion of electricity and thermal energy, providing strong support for the stable operation of the power grid and heating needs.

[0004] In the field of photovoltaic peak-shaving and back-pressure unit heating, the existing technical solutions mainly include battery energy storage, pumped storage, etc. Although battery energy storage technology can achieve rapid storage and release of electric energy, the energy storage density is limited, and as the number of charge and discharge times increases, the battery performance will gradually decline. Pumped storage technology needs to be built under specific geographical conditions and has a certain impact on the ecological environment. In contrast, molten salt energy storage technology has a higher energy storage density and a longer service life, and is not restricted by geographical conditions. Therefore, it has broad application prospects in the field of photovoltaic peak-shaving and back-pressure unit heating.

[0005] Among the existing technologies, some schemes have tried to apply molten salt energy storage technology to photovoltaic peak-shaving and heating systems. These schemes mainly include: molten salt energy storage and photovoltaic combined power supply system: This system converts the electricity generated by photovoltaic energy into thermal energy and stores it in molten salt, and converts the thermal energy into electricity through thermal power generation technology when needed. This scheme can achieve stable output of photovoltaic energy, but usually only focuses on the storage and conversion of electrical energy, while ignoring the application of thermal energy; molten salt energy storage and back pressure unit combined heating system: This system uses the high thermal capacity and fluidity of molten salt to directly transfer thermal energy to the back pressure unit to meet the heating demand. However, this scheme usually only focuses on the utilization of thermal energy, without combining photovoltaic energy with molten salt energy storage technology, and cannot achieve the peak-shaving function of photovoltaic energy; photothermal energy storage system: This is a system that converts photovoltaic energy into thermal energy and stores it in a specific medium (such as molten salt). When needed, the thermal energy can be released as electrical energy or thermal energy through a heat exchanger. Although this scheme can achieve stable output and peak-shaving functions of photovoltaic energy, it usually requires the use of special media and complex equipment, which is costly. Summary of the invention

[0006] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0007] In view of the above existing problems, the present invention is proposed. Therefore, the present invention provides a molten salt energy storage method for photovoltaic peak regulation and back pressure unit heating to solve the instability of photovoltaic energy, the mismatch between power demand and photovoltaic output, the coordination problem of back pressure unit heating and power supply, and improve energy utilization efficiency, environmental protection and sustainability.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0009] In a first aspect, the present invention provides a molten salt energy storage method for photovoltaic peak regulation and back pressure unit heating, comprising: setting monitoring points at the photovoltaic power generation end and the heating network end, and obtaining monitoring data of the monitoring points;

[0010] Based on the monitoring data, determining whether there is excess electric energy, converting the excess electric energy into thermal energy through molten salt energy storage conversion, and storing the excess thermal energy;

[0011] Based on the stored thermal energy, judging according to the user load demand of the power supply network, using the stored thermal energy for heating and generating a heating plan;

[0012] The heating scheme is dynamically adjusted and optimized according to the real-time load demand and the molten salt energy storage status.

[0013] As a preferred solution of the molten salt energy storage method for photovoltaic peak regulation and back pressure unit heating according to the present invention, wherein: the acquisition of the monitoring data of the monitoring point includes:

[0014] According to the set key positions of the photovoltaic power generation end and the key nodes of the heating network, monitoring points are set and monitoring equipment is installed at the monitoring points;

[0015] The monitoring data is obtained through the detection equipment at the monitoring point, and the monitoring data includes photovoltaic power generation data, heating network data and molten salt energy storage data.

[0016] As a preferred solution of the molten salt energy storage method for photovoltaic peak regulation and back pressure unit heating according to the present invention, the determination of whether there is excess electric energy includes:

[0017] According to the difference between the current photovoltaic power generation power and the factory power consumption power, if the photovoltaic power generation power exceeds the factory power consumption demand, and the period of occurrence of the excess exceeds the preset period, it is judged that there is excess electric energy at the photovoltaic power generation end;

[0018] The excess electrical energy is converted into thermal energy by means of resistance heating, and the molten salt is heated to store the thermal energy.

[0019] As a preferred solution of the molten salt energy storage method for photovoltaic peak regulation and back pressure unit heating described in the present invention, wherein: the storage of excess thermal energy includes:

[0020] According to the real-time change rate of user load, if the ratio of the user's actual reduction in steam consumption to the total steam consumption exceeds the preset change threshold, and the back pressure increase rate is greater than the back pressure threshold, and the exhaust temperature increase rate is greater than the temperature threshold, the heat of the heating network is stored;

[0021] An energy storage threshold is set. If the energy storage threshold is less than the energy storage threshold, the energy storage condition is met, and energy conversion is automatically started to store the heat energy converted from the excess electricity generated by photovoltaic power generation and the heat energy of the heating network;

[0022] Real-time monitoring is used to obtain the operating parameters of molten salt energy storage and determine whether the storage process is safe.

[0023] As a preferred solution of the molten salt energy storage method for photovoltaic peak regulation and back pressure unit heating according to the present invention, the judgment based on the user load demand of the power supply network includes:

[0024] According to the user load demand of the heating network, when the heating network is insufficient in heat supply, that is, the value of the heating network steam consumption exceeding the gas supply exceeds the heating threshold, the heat release condition is met and heat energy is released through molten salt energy storage;

[0025] Real-time monitoring of the operating parameters of the molten salt energy storage, including temperature, liquid level, pressure and flow data, to ensure that the operating parameters are within a safe value range and heat energy is released, otherwise heat energy output is stopped.

[0026] As a preferred solution of the molten salt energy storage method for photovoltaic peak regulation and back pressure unit heating according to the present invention, the heating generation scheme includes:

[0027] When the heat release conditions are met, the heat release is automatically started to transfer the heat energy in the molten salt to the medium in the heating network;

[0028] Perform heat calculation and calculate the heat value that needs to be supplemented based on the difference between the user's actual demand and heating capacity;

[0029] According to the calculated heat value that needs to be supplemented, the heat range released in the molten salt energy storage is determined, and the heat energy release process of the molten salt energy storage is adjusted.

[0030] As a preferred solution of the molten salt energy storage method for photovoltaic peak regulation and back pressure unit heating described in the present invention, the dynamic adjustment and optimization of the heating scheme includes:

[0031] Dynamically adjust the heat release rate and the steam pressure and temperature data of the heating network according to the real-time load demand and the molten salt energy storage status;

[0032] Through the PID control algorithm, the heating process is automatically adjusted and optimized, and regular maintenance is performed.

[0033] In a second aspect, the present invention provides a molten salt energy storage system for photovoltaic peak regulation and back pressure unit heating, comprising:

[0034] An acquisition module is used to set monitoring points at the photovoltaic power generation end and the heating network end to obtain monitoring data of the monitoring points;

[0035] A conversion module, used to determine whether there is excess electric energy based on the monitoring data, convert the excess electric energy into thermal energy through molten salt energy storage conversion, and store the excess thermal energy;

[0036] A heating module, for judging based on the stored thermal energy and according to the user load demand of the power supply network, providing heating using the stored thermal energy and generating a heating plan;

[0037] The optimization module is used to dynamically adjust and optimize the heating scheme according to real-time load demand and molten salt energy storage status.

[0038] In a third aspect, the present invention provides an electronic device, comprising:

[0039] Memory and processor;

[0040] The memory is used to store computer-executable instructions, and the processor is used to execute the computer-executable instructions. When the computer-executable instructions are executed by the processor, the steps of the molten salt energy storage method for photovoltaic peak regulation and back-pressure unit heating are implemented.

[0041] In a fourth aspect, the present invention provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the steps of the molten salt energy storage method for photovoltaic peak regulation and back-pressure unit heating.

[0042] Compared with the prior art, the present invention has the following beneficial effects: the present invention realizes the stable output and peak-shaving function of photovoltaic energy, and fully utilizes the advantages of molten salt energy storage technology, effectively combines electrical energy and thermal energy, improves energy utilization efficiency, reduces system cost, and provides a new solution for the field of photovoltaic peak-shaving and back-pressure unit heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0044] Figure 1 The present invention is a schematic diagram of the overall process of a molten salt energy storage method for photovoltaic peak regulation and back pressure unit heating according to an embodiment of the present invention. DETAILED DESCRIPTION

[0045] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work should fall within the scope of protection of the present invention.

[0046] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0047] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0048] The present invention is described in detail with reference to schematic diagrams. When describing the embodiments of the present invention, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0049] At the same time, in the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper, lower, inner and outer" are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first, second or third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0050] In the present invention, unless otherwise clearly specified and limited, the terms "install, connect, connect" should be understood in a broad sense, for example: it can be a fixed connection, a detachable connection or an integral connection; it can also be a mechanical connection, an electrical connection or a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] Reference Figure 1 , which is an embodiment of the present invention, provides a molten salt energy storage method for photovoltaic peak regulation and back pressure unit heating, comprising:

[0052] S101, setting monitoring points at the photovoltaic power generation end and the heating network end, and obtaining monitoring data of the monitoring points;

[0053] S102, based on the monitoring data, determining whether there is excess electric energy, converting the excess electric energy into thermal energy through molten salt energy storage, and storing the excess thermal energy;

[0054] S103, based on the stored thermal energy, judging according to the user load demand of the power supply network, using the stored thermal energy for heating, and generating a heating plan;

[0055] S104: Dynamically adjust and optimize the heating plan according to the real-time load demand and the molten salt energy storage status.

[0056] It should be noted that due to weather factors (such as cloud cover, day and night alternation, etc.), the output of photovoltaic energy is unstable and intermittent. This instability may lead to fluctuations in power supply and pose a challenge to the stable operation of the power grid. The invention uses a molten salt energy storage device to store energy when photovoltaic energy is sufficient and release energy when energy is insufficient, thereby smoothing out fluctuations in power supply. Electricity demand is usually not fully matched with the output of photovoltaic energy. Especially during peak hours, electricity demand may far exceed the output of photovoltaic energy. Molten salt energy storage can act as a buffer to store excess electricity generated by photovoltaic energy during low-demand periods and release it during peak hours to meet electricity demand. Backpressure units usually generate both electricity and heat energy, but there may be a contradiction between electricity demand and heating demand. The molten salt energy storage device can serve as an intermediate link to convert the electricity generated by photovoltaic energy into heat energy for storage, and then release it through the backpressure unit or other heating equipment when needed to achieve coordination between electricity supply and heating demand. Traditional energy storage methods may have problems of energy loss and inefficiency. Molten salt energy storage can achieve efficient and stable energy storage and release through its unique energy storage mechanism, thereby improving the energy utilization efficiency of the entire system. As a clean energy, the use of photovoltaic energy is of great significance for reducing fossil energy consumption and greenhouse gas emissions. Molten salt energy storage, as one of the effective ways to utilize photovoltaic energy, helps to improve the utilization efficiency and environmental protection of photovoltaic energy and promote the development of sustainable energy.

[0057] The present invention uses molten salt as an energy storage medium. When the photovoltaic power generation system needs to peak, the excess electricity is converted into heat energy through the energy conversion system to heat the molten salt and store it. Or when the user load of the heating network fluctuates, such as the user load drops rapidly, the back pressure and exhaust temperature rise rapidly, the excess heat can be converted into heat energy through the heat energy converter to heat the molten salt and store it. When the heating network heat supply increases, the heat of the molten salt is released for use by the users of the heating network.

[0058] Preferably, in step S101, obtaining monitoring data of a monitoring point includes:

[0059] According to the key locations of the photovoltaic power generation end and the key nodes of the heating network, monitoring points are set up and monitoring equipment is installed at the monitoring points;

[0060] Monitoring data is obtained through detection equipment at monitoring points, including photovoltaic power generation data, heating pipeline network data and molten salt energy storage data.

[0061] Specifically, the key positions of the photovoltaic power generation system can be the solar panel array and the inverter output end, and the key nodes of the heating network can be the user end entrance and the heat source output end. Monitoring equipment is installed at the monitoring point, and the monitoring equipment can be temperature sensors, pressure sensors, flow sensors and electric energy meters, etc. Among them, photovoltaic power generation data can be light intensity, solar panel temperature, power generation, power generation data, etc., heating network data user load, heating network temperature, pressure, flow, back pressure, exhaust temperature data, etc., molten salt energy storage data molten salt energy storage system temperature, pressure, liquid level, flow data, etc.

[0062] Preferably, in step S102, determining whether there is excess electric energy includes:

[0063] According to the difference between the current photovoltaic power generation and the power used in the factory, if the photovoltaic power generation exceeds the power demand of the factory, and the period of occurrence of the excess exceeds the preset period, it is judged that there is excess power at the photovoltaic power generation end, wherein the preset period is preferably 15 minutes;

[0064] Excess electrical energy is converted into thermal energy through resistance heating, and molten salt is heated for thermal energy storage.

[0065] Among them, excess electrical energy can be converted into thermal energy through resistive heating or other methods.

[0066] Preferably, in step S102, storing the excess thermal energy includes:

[0067] According to the real-time change rate of user load, if the ratio of the user's actual reduction in steam consumption to the total steam consumption exceeds the preset change threshold, and the back pressure increase rate is greater than the back pressure threshold, and the exhaust temperature increase rate is greater than the temperature threshold, the heat of the heating network is stored;

[0068] Set an energy storage threshold. If it is less than the energy storage threshold, the energy storage condition is met, and energy conversion is automatically started to store the heat energy converted from excess photovoltaic power generation and the heat energy of the heating network;

[0069] Real-time monitoring is performed to obtain the operating parameters of the molten salt energy storage to determine whether the storage process is safe. The determination of whether the storage process is safe may be performed by real-time monitoring of parameters such as the temperature and pressure of the molten salt energy storage to ensure that the operating parameters are within a safe range.

[0070] Specifically, the real-time change rate of user load can be obtained through the real-time data displayed in the heating network system. If the heating user suddenly stops using steam due to equipment or other reasons, the load drops rapidly and the back pressure and exhaust temperature rise rapidly, it is considered that the heating network has surplus heat that needs to be stored, among which the preset change threshold can be 20%, the back pressure threshold can be 0.01MPa / min, and the temperature threshold can be 1℃ / min. The energy storage threshold can be set according to the actual scenario. A reasonable energy storage threshold is set to ensure energy storage without affecting the stable operation of the system. When the steam consumption of the heating network decreases, energy storage is carried out when the back pressure is greater than 1MPa, and energy storage is stopped when the back pressure is lower than 0.96MPa.

[0071] It should be noted that when the energy storage conditions are met, energy conversion (such as power electronic converter, thermal energy converter, etc.) is started automatically or manually, and the temperature, pressure and other parameters of the molten salt energy storage system are monitored in real time to ensure the safety and stability of the storage process.

[0072] Preferably, in step S103, judging according to the user load demand of the power supply network includes:

[0073] According to the user load demand of the heating network, when the heating network is insufficient in heat supply, that is, the value of the steam consumption of the heating network is greater than the gas supply and exceeds the heating threshold, the heat release condition is met and heat energy is released through molten salt energy storage. Among them, the insufficient heat supply of the heating network can be the result of real-time data analysis or the predicted data result, and advance planning is carried out. The heating threshold can be 10t / h;

[0074] Real-time monitoring of the operating parameters of molten salt energy storage, including temperature, liquid level, pressure and flow data, to ensure that the operating parameters are within a safe value range and heat energy is released, otherwise the heat energy output is stopped.

[0075] It should be noted that according to the user load demand of the heating network, when the heating network is insufficient or predicted to be insufficient, the thermal energy release process of the molten salt energy storage is started, and the temperature, liquid level and other parameters of the molten salt energy storage system are monitored in real time to ensure that thermal energy is released without affecting the long-term stable operation of the system. Insufficient heat supply usually means that the heat provided by the heating system cannot meet the actual needs of users, which may be due to an increase in steam consumption by heat users.

[0076] Preferably, in step S103, generating a heating plan includes:

[0077] When the heat release conditions are met, the heat release is automatically started, such as by releasing heat through a heat exchanger, a pump, etc., to transfer the heat energy in the molten salt to a medium in the heating network, which may be water or other medium in the heating network, to achieve heat release;

[0078] Perform heat calculation and calculate the heat value that needs to be supplemented based on the difference between the user's actual demand and heating capacity;

[0079] According to the calculated heat value that needs to be supplemented, the heat range released in the molten salt energy storage is determined, and the heat energy release process of the molten salt energy storage is adjusted.

[0080] It should be noted that to determine the heat range that the molten salt energy storage system needs to release, it is usually necessary to adjust it according to the storage capacity and release rate of the molten salt energy storage, and adjust the thermal energy release process of the molten salt energy storage through intelligent control to ensure that the released heat can accurately meet the needs of users. Control algorithms and sensor technology can be used to achieve precise control and adjustment, and real-time monitoring of temperature, flow and other parameters of the heating pipeline network to ensure that the heating process is stable and meets user needs.

[0081] Preferably, in step S104, dynamically adjusting and optimizing the heating scheme includes:

[0082] Dynamically adjust the heat release rate and the steam pressure and temperature data of the heating network according to the real-time load demand and the molten salt energy storage status;

[0083] Through the PID control algorithm, the heating process is automatically adjusted and optimized, and regular maintenance is performed.

[0084] Specifically, according to the real-time load demand and the molten salt energy storage status, it is specifically reflected as follows: based on load demand: when the load demand increases, the heat energy release rate of the molten salt energy storage system is increased to meet the heating demand; when the load demand decreases, the heat energy release rate is reduced to avoid energy waste; based on the molten salt energy storage status: consider parameters such as temperature, pressure and heat storage capacity of the molten salt energy storage.

[0085] Specifically, PID (proportional-integral-differential) control is a classic control algorithm suitable for precise control of temperature, flow and other parameters of the heating system. By adjusting the proportional, integral and differential parameters of the PID controller, precise regulation of the heat output of the heating system can be achieved to meet user needs and system stability requirements. The PID control algorithm can monitor system data in real time with temperature sensors, flow sensors, etc., and automatically adjust according to the deviation between the set value and the actual value.

[0086] It should be noted that according to the real-time load demand and the status of the molten salt energy storage system, the heat energy release rate and the steam pressure, steam temperature and other parameters of the heating network are dynamically adjusted, and intelligent control algorithms (such as PID control, fuzzy control, etc.) are used to realize automatic adjustment and optimized operation of the heating system. The system is regularly maintained and serviced to ensure long-term stable operation of the system and extend its service life.

[0087] The molten salt energy storage technology in the present invention utilizes the high heat capacity and stability of molten salt to store and release energy, and is closely integrated with the photovoltaic power generation system. It can store excess electrical energy during the peak of photovoltaic power generation and convert it into thermal energy for heating. It is connected to the back pressure unit and utilizes the heat of the molten salt to provide a stable heat source for the heating system, thereby improving the energy conversion efficiency of the molten salt energy storage device and reducing energy loss.

[0088] Advanced control algorithms and intelligent control are used to achieve precise control and optimized operation of molten salt energy storage. According to the actual needs of the photovoltaic power generation system and the back-pressure unit heating system, the energy storage and release strategies of the molten salt energy storage are dynamically adjusted to improve the energy conversion efficiency of the overall system. Energy management is introduced to integrate and optimize molten salt energy storage, photovoltaic power generation and back-pressure unit heating to achieve efficient allocation and utilization of energy. Big data and artificial intelligence technologies are used to monitor and analyze the system operation status in real time, predict future energy needs, and adjust energy storage and heating strategies in advance. The connection method between molten salt energy storage and photovoltaic power generation and back-pressure unit heating is optimized to reduce losses during energy transmission, improve the collaboration between various parts, and ensure efficient operation and stability of the system.

[0089] The above is a schematic scheme of a molten salt energy storage method for photovoltaic peak shaving and back pressure unit heating in this embodiment. It should be noted that the technical scheme of the molten salt energy storage system for photovoltaic peak shaving and back pressure unit heating belongs to the same concept as the technical scheme of the molten salt energy storage method for photovoltaic peak shaving and back pressure unit heating mentioned above. The details not described in detail in the technical scheme of the molten salt energy storage system for photovoltaic peak shaving and back pressure unit heating in this embodiment can be referred to the description of the technical scheme of the molten salt energy storage method for photovoltaic peak shaving and back pressure unit heating mentioned above.

[0090] The molten salt energy storage system used for photovoltaic peak regulation and back pressure unit heating in this embodiment includes:

[0091] An acquisition module is used to set monitoring points at the photovoltaic power generation end and the heating network end to obtain monitoring data of the monitoring points;

[0092] The conversion module is used to determine whether there is excess electric energy based on the monitoring data, convert the excess electric energy into thermal energy through molten salt energy storage, and store the excess thermal energy;

[0093] A heating module is used to generate a heating plan based on the stored thermal energy and judging the user load demand of the power supply network;

[0094] The optimization module is used to dynamically adjust and optimize the heating plan according to the real-time load demand and the molten salt energy storage status.

[0095] Among them, the acquisition module includes a photovoltaic array device, which is composed of multiple photovoltaic panels and converts solar energy into direct current electricity through the photoelectric effect.

[0096] The conversion module uses molten salt as the energy storage medium. Molten salt has the advantages of good high-temperature stability, large heat capacity, low viscosity and good fluidity. It is very suitable as an energy storage medium. When the photovoltaic array generates surplus electricity, the electricity is converted into thermal energy through the thermal energy conversion system. Or when the user load of the heating pipeline network fluctuates, such as the user load drops rapidly, the back pressure and exhaust temperature rise rapidly, the surplus heat can be converted into thermal energy through the thermal energy converter to heat the molten salt and store it.

[0097] The conversion module is mainly composed of an electric heater, a thermal heater, a molten salt storage tank and a heat conduction device. The heater converts electric energy or thermal energy into thermal energy to heat the molten salt. The molten salt storage tank is used to store the heated molten salt. The heat conduction device conducts the thermal energy in the molten salt to the unit heating system to realize the utilization of thermal energy.

[0098] This embodiment also provides an electronic device, which is applicable to molten salt energy storage for photovoltaic peak regulation and back pressure unit heating, including:

[0099] Memory and processor; the memory is used to store computer executable instructions, and the processor is used to execute computer executable instructions to implement the molten salt energy storage method for photovoltaic peak regulation and back pressure unit heating as proposed in the above embodiment.

[0100] This embodiment also provides a storage medium on which a computer program is stored. When the program is executed by a processor, the molten salt energy storage method for photovoltaic peak regulation and back-pressure unit heating proposed in the above embodiment is implemented.

[0101] The storage medium proposed in this embodiment and the molten salt energy storage method for photovoltaic peak regulation and back pressure unit heating proposed in the above embodiment belong to the same inventive concept. The technical details not described in detail in this embodiment can be referred to the above embodiment, and this embodiment has the same beneficial effects as the above embodiment.

[0102] Through the above description of the implementation methods, the technicians in the relevant field can clearly understand that the present invention can be implemented by means of software and necessary general hardware, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (ReadOnly, Memory, ROM), random access memory (RandomAccess Memory, RAM), flash memory (FLASH), hard disk or optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform the methods of various embodiments of the present invention.

[0103] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A molten salt energy storage method for photovoltaic peak regulation and back pressure unit heating, characterized in that: include: Setting monitoring points at the photovoltaic power generation end and the heating network end to obtain monitoring data of the monitoring points; Based on the monitoring data, determining whether there is excess electric energy, converting the excess electric energy into thermal energy through molten salt energy storage conversion, and storing the excess thermal energy; Based on the stored thermal energy, judging according to the user load demand of the power supply network, using the stored thermal energy for heating and generating a heating plan; The heating scheme is dynamically adjusted and optimized according to the real-time load demand and the molten salt energy storage status.

2. The molten salt energy storage method for photovoltaic peak regulation and back pressure unit heating according to claim 1, characterized in that: The acquiring of the monitoring data of the monitoring point comprises: According to the set key positions of the photovoltaic power generation end and the key nodes of the heating network, monitoring points are set and monitoring equipment is installed at the monitoring points; The monitoring data is obtained through the detection equipment at the monitoring point, and the monitoring data includes photovoltaic power generation data, heating network data and molten salt energy storage data.

3. The molten salt energy storage method for photovoltaic peak regulation and back pressure unit heating according to claim 1 or 2, characterized in that: The determining whether there is excess electric energy includes: According to the difference between the current photovoltaic power generation power and the factory power consumption power, if the photovoltaic power generation power exceeds the factory power consumption demand, and the period of occurrence of the excess exceeds the preset period, it is judged that there is excess electric energy at the photovoltaic power generation end; The excess electrical energy is converted into thermal energy by means of resistance heating, and the molten salt is heated to store the thermal energy.

4. The molten salt energy storage method for photovoltaic peak regulation and back pressure unit heating according to claim 3, characterized in that: The storage of excess thermal energy comprises: According to the real-time change rate of user load, if the ratio of the user's actual reduction in steam consumption to the total steam consumption exceeds the preset change threshold, and the back pressure increase rate is greater than the back pressure threshold, and the exhaust temperature increase rate is greater than the temperature threshold, the heat of the heating network is stored; An energy storage threshold is set. If the energy storage threshold is less than the energy storage threshold, the energy storage condition is met, and energy conversion is automatically started to store the heat energy converted from the excess electricity generated by photovoltaic power generation and the heat energy of the heating network; Real-time monitoring is used to obtain the operating parameters of molten salt energy storage and determine whether the storage process is safe.

5. The molten salt energy storage method for photovoltaic peak regulation and back pressure unit heating according to claim 4, characterized in that: Judgment based on user load demand of the power supply network includes: According to the user load demand of the heating network, when the heating network is insufficient in heat supply, that is, the value of the heating network steam consumption exceeding the gas supply exceeds the heating threshold, the heat release condition is met and heat energy is released through molten salt energy storage; Real-time monitoring of the operating parameters of the molten salt energy storage, including temperature, liquid level, pressure and flow data, to ensure that the operating parameters are within a safe value range and heat energy is released, otherwise heat energy output is stopped.

6. The molten salt energy storage method for photovoltaic peak regulation and back pressure unit heating according to claim 5, characterized in that: The heat generation scheme includes: When the heat release conditions are met, the heat release is automatically started to transfer the heat energy in the molten salt to the medium in the heating network; Perform heat calculation and calculate the heat value that needs to be supplemented based on the difference between the user's actual demand and heating capacity; According to the calculated heat value that needs to be supplemented, the heat range released in the molten salt energy storage is determined, and the heat energy release process of the molten salt energy storage is adjusted.

7. The molten salt energy storage method for photovoltaic peak regulation and back pressure unit heating according to any one of claims 4 to 6, characterized in that: Dynamically adjusting and optimizing the heating scheme includes: Dynamically adjust the heat release rate and the steam pressure and temperature data of the heating network according to the real-time load demand and the molten salt energy storage status; Through the PID control algorithm, the heating process is automatically adjusted and optimized, and regular maintenance is performed.

8. A molten salt energy storage system for photovoltaic peak regulation and back pressure unit heating, characterized in that: include, An acquisition module is used to set monitoring points at the photovoltaic power generation end and the heating network end to obtain monitoring data of the monitoring points; A conversion module, for determining whether there is excess electric energy based on the monitoring data, converting the excess electric energy into thermal energy through molten salt energy storage conversion, and storing the excess thermal energy; A heating module, for judging based on the stored thermal energy and according to the user load demand of the power supply network, providing heating using the stored thermal energy and generating a heating plan; The optimization module is used to dynamically adjust and optimize the heating scheme according to real-time load demand and molten salt energy storage status.

9. An electronic device, characterized in that: include: Memory and processor; The memory is used to store computer-executable instructions, and the processor is used to execute the computer-executable instructions. When the computer-executable instructions are executed by the processor, the steps of the molten salt energy storage method for photovoltaic peak regulation and back-pressure unit heating as described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium, characterized in that: It stores computer executable instructions, which, when executed by a processor, implement the steps of the molten salt energy storage method for photovoltaic peak regulation and back pressure unit heating as described in any one of claims 1 to 7.

Images