Fused salt energy storage power generation phase modulation system

Abstract

The invention discloses a fused salt energy storage power generation phase modulation system, relates to the technical field of power grid regulation and control, solves the defect that electric energy generated by wind power generation equipment or photovoltaic power generation equipment cannot be consumed in time in the prior art to a certain extent, and achieves the purpose of reducing waste of electric energy resources. And meanwhile, power can be supplied to a load in an external power grid when the external load demand is large. The system comprises a low-temperature fused salt tank, a high-temperature fused salt tank, a fused salt electric heater, a steam generator, a power generation module and a control module, and the control module is used for controlling the fused salt electric heater to receive electric energy of an external power grid and heat a fused salt medium when the load demand power of the external power grid is smaller than the output power of power generation equipment. And when the load demand power of the external power grid is greater than or equal to the output power of the power generation equipment, controlling the power generation module to supply power to the external power grid.

Description

Technical Field

[0001] The present application relates to the technical field of molten salt energy storage, and in particular to a molten salt energy storage power generation phase modulation system. Background Art

[0002] Molten salt energy storage technology is a technology that uses high-temperature molten salt as a medium, uses energy storage equipment to convert excess electrical energy into thermal energy, and then stores the thermal energy. When needed, the thermal energy is converted into electrical energy and supplied to the power grid. Molten salt energy storage technology mainly includes two links: energy storage link and energy release link. In the energy storage link, electrical energy is converted into thermal energy through electrothermal conversion equipment, and the thermal energy is transferred to molten salt for storage; in the energy release link, molten salt converts the stored thermal energy into electrical energy through thermal energy conversion equipment and supplies it to the power grid.

[0003] Since wind power generation and photovoltaic power generation are affected by external environmental conditions, when the wind is strong or the light is strong, the corresponding wind power generation equipment or photovoltaic power generation equipment can convert and generate more electricity. However, since users in the distribution network cannot consume the electricity generated by the power generation equipment in time, it will lead to the occurrence of phenomena such as "wind and light abandonment", resulting in the electricity generated by the power generation equipment being wasted.

[0004] In order to reduce the situation where the electric energy generated by wind power generation and photovoltaic power generation equipment cannot be consumed, resulting in waste of electric energy resources, and at the same time supply power to the load in the external power grid when the external load demand is large, the present application provides a molten salt energy storage power generation phase modulation system. Summary of the invention

[0005] The embodiment of the present application solves the defect in the prior art that the electric energy generated by wind power generation equipment or photovoltaic power generation equipment cannot be consumed in time by providing a molten salt energy storage power generation phase adjustment system, thereby achieving the purpose of reducing the waste of electric energy. At the same time, it can supply power to the load in the external power grid when the external load demand is large.

[0006] The present application provides a molten salt energy storage power generation phase adjustment system, including:

[0007] Low-temperature molten salt tank, used to contain low-temperature molten salt medium;

[0008] High temperature molten salt tank, used to hold high temperature molten salt medium;

[0009] A molten salt electric heater is connected to the low-temperature molten salt tank and the high-temperature molten salt tank, and is used to heat the molten salt medium by using the electric energy in the external power grid. The low-temperature molten salt medium in the low-temperature molten salt tank is heated by the molten salt electric heater to form a high-temperature molten salt medium which is pumped into the high-temperature molten salt tank;

[0010] A steam generator, comprising a first cavity storing circulating water and a second cavity communicating with a molten salt medium, wherein the second cavity is communicated with the high-temperature molten salt tank and the low-temperature molten salt tank, and the steam generator is used to heat the circulating water in the first cavity to generate steam by utilizing the temperature of the high-temperature molten salt medium in the high-temperature molten salt tank in the second cavity;

[0011] A power generation module, used for converting the kinetic energy of the steam generated by the steam generator into electrical energy and transmitting the electrical energy to an external power grid;

[0012] The control module is used to control the molten salt electric heater to receive electric energy from the external power grid and heat the molten salt medium when the load demand power of the external power grid is less than the output power of the power generation equipment, and to control the power generation module to supply power to the external power grid when the load demand power of the external power grid is greater than or equal to the output power of the power generation equipment.

[0013] In a possible implementation, the method further includes:

[0014] The load prediction module is connected to the control module and the external power grid, and is used to collect historical load data of the external power grid, use a pre-built load prediction model to predict the load demand power of the external power grid, and transmit the prediction result to the control module.

[0015] In a possible implementation, the power generation module includes:

[0016] A steam turbine, connected to the first cavity of the steam generator through a pipeline, and used to drive its own rotating shaft to rotate by utilizing the steam in the first cavity of the steam generator;

[0017] A generator connected to the rotating shaft of the steam turbine and used to generate electricity driven by the rotating shaft of the steam turbine;

[0018] A condenser is connected to the first cavity of the steam generator and the steam turbine, and is used for condensing steam into circulating water and pumping the circulating water to the first cavity of the steam generator.

[0019] In a possible implementation, the power generation module further includes:

[0020] A waste heat recovery unit has one end disposed around the periphery of the steam turbine and the other end connected to the first cavity of the steam generator, and is used to heat the circulating water by utilizing the heat energy around the steam turbine.

[0021] In a possible implementation, the condenser is connected to a water supply channel, and a water supply pump is installed on the water supply channel.

[0022] In a possible implementation, the first cavity and the second cavity of the steam generator are both spiral, and the first cavity and the second cavity are intertwined with each other and arranged in parallel.

[0023] In a possible implementation, a filter unit is further connected to the first cavity of the steam generator where it is connected to the condenser, and the filter unit is used to filter out impurities in the condensation circulating water of the condenser.

[0024] In a possible implementation, the method further includes:

[0025] The detection module is connected between the molten salt electric heater and the control module, and is used for detecting the operation data of the molten salt electric heater and transmitting the operation data to the control module.

[0026] In a possible implementation, the detection module includes:

[0027] A temperature detection unit, used for real-time monitoring of temperature data in the molten salt electric heater;

[0028] A data comparison unit, used to compare the temperature data acquired by the temperature detection unit in real time based on the temperature data acquired by the temperature detection unit at the previous moment;

[0029] The data transmission unit is used to transmit the temperature data monitored by the temperature detection unit and the comparison result of the data comparison unit to the control module.

[0030] In a possible implementation, the method further includes:

[0031] The alarm module is connected to the control module and is used to generate a warning signal when there is an abnormality in the temperature data monitored by the temperature detection unit or the comparison result of the data comparison unit received by the control module.

[0032] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0033] 1. Timely consume the electric energy output by the power generation equipment in the external power grid, use the molten salt electric heater to receive the electric energy output by the power generation equipment in the external power grid under the control of the control module, and convert the electric energy in the external power grid into the heat energy of the molten salt medium, so as to store the excess electric energy generated by the wind power generation and photovoltaic power generation equipment, and reduce the situation where the electric energy generated by the wind power generation and photovoltaic power generation equipment cannot be consumed, resulting in the waste of electric energy resources;

[0034] 2. To supplement the load power demand of the external power grid, the steam generator is used to generate steam under the heating of the molten salt medium in the high-temperature molten salt tank, and the kinetic energy of the steam is converted into electrical energy by the power generation module, and the electrical energy is input into the external power grid, thereby supplementing the load power demand of the external power grid;

[0035] 3. Set up a high-temperature molten salt tank and a low-temperature molten salt tank for storing molten salt media. Use the high-temperature molten salt tank to store the heated molten salt medium, and use the low-temperature molten salt tank to store the cooled molten salt medium, so as to realize classified storage of the molten salt medium and improve the convenience of using the thermal energy of the molten salt medium to store excess electric energy in the external power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments of the present application or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0037] Figure 1 A schematic diagram of the operating status of a molten salt energy storage power generation phase modulation system provided in an embodiment of the present application;

[0038] Figure 2 A schematic diagram of the structure of a molten salt energy storage power generation phase modulation system provided in an embodiment of the present application;

[0039] Figure 3 A schematic diagram of the structure of a detection module of a molten salt energy storage power generation phase modulation system provided in an embodiment of the present application.

[0040] Figure numerals: 1. low-temperature molten salt tank; 2. high-temperature molten salt tank; 3. molten salt electric heater; 4. steam generator; 41. first cavity; 42. second cavity; 5. power generation module; 51. steam turbine; 52. generator; 53. condenser; 54. waste heat recovery unit; 55. make-up water channel; 56. make-up water pump; 57. filter unit; 6. control module; 7. load prediction module; 8. detection module; 81. temperature detection unit; 82. data comparison unit; 83. data transmission unit; 9. alarm module. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0042] In the description of the embodiments of the present application, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0043] Reference Figure 1 and Figure 2 The present application sets a control module 6, and uses the control module 6 to compare the load demand power of the external power grid and the output power of the power generation equipment. When the load demand power of the external power grid is less than the output power of the power generation equipment, the molten salt electric heater 3 is controlled to receive the electric energy of the external power grid and heat the molten salt medium. The molten salt electric heater 3 is used to heat the molten salt medium input from the low-temperature molten salt tank 1 to the molten salt electric heater 3, and the heated molten salt medium is stored in the high-temperature molten salt tank 2 by pumping. The output electric energy of the power generation equipment is stored by the heated molten salt medium, thereby reducing the situation where the electric energy generated by the power generation equipment cannot be consumed, resulting in waste of electric energy resources; at the same time, when the load demand power of the external power grid is greater than or equal to the output power of the power generation equipment, the control module 6 controls the power generation module 5 to generate electric energy under the impetus of the steam generated by the steam generator 4, and supplies power to the external power grid, which effectively solves the problem of supplying power to the load of the external power grid when the output power of the power generation equipment is insufficient, and effectively reduces the probability of electric energy being wasted.

[0044] In some embodiments, the present application discloses a molten salt energy storage power generation phase adjustment system, comprising:

[0045] Low temperature molten salt tank 1, used for containing low temperature molten salt medium;

[0046] High temperature molten salt tank 2, used for containing high temperature molten salt medium;

[0047] The molten salt electric heater 3 is connected to the low-temperature molten salt tank 1 and the high-temperature molten salt tank 2, and is used to heat the molten salt medium by using the electric energy in the external power grid. The low-temperature molten salt medium in the low-temperature molten salt tank 1 is heated by the molten salt electric heater 3 to form a high-temperature molten salt medium which is pumped into the high-temperature molten salt tank 2;

[0048] The steam generator 4 comprises a first cavity 41 storing circulating water and a second cavity 42 communicating with a molten salt medium, wherein the second cavity 42 is communicated with the high-temperature molten salt tank 2 and the low-temperature molten salt tank 1, and the steam generator 4 is used to heat the circulating water in the first cavity 41 to generate steam by utilizing the temperature of the high-temperature molten salt medium in the high-temperature molten salt tank 2 in the second cavity 42;

[0049] The power generation module 5 is used to convert the kinetic energy of the steam generated by the steam generator 4 into electrical energy and transmit the electrical energy to an external power grid;

[0050] The control module 6 is used to control the molten salt electric heater 3 to receive electric energy from the external power grid and heat the molten salt medium when the load demand power of the external power grid is less than the output power of the power generation equipment, and to control the power generation module 5 to supply power to the external power grid when the load demand power of the external power grid is greater than or equal to the output power of the power generation equipment.

[0051] Exemplarily, the low-temperature molten salt tank 1 and the high-temperature molten salt tank 2 are both vertically arranged cylindrical tank bodies, and the outer wall circumference of the high-temperature molten salt tank 2 is provided with an insulation layer to insulate the stored molten salt medium. The molten salt medium stored in the low-temperature molten salt tank 1 is the same as the molten salt medium stored in the high-temperature molten salt tank 2, but the temperature of the molten salt medium in the low-temperature molten salt tank 1 is lower than the temperature of the molten salt medium in the high-temperature molten salt tank 2.

[0052] The molten salt electric heater 3 is connected between the low-temperature molten salt tank 1 and the high-temperature molten salt tank 2 through a pipeline. The molten salt electric heater 3 heats the molten salt medium by utilizing the electric energy received from the external power grid, and stores the heated molten salt medium in the high-temperature molten salt tank 2 by pumping, thereby consuming the excess electric energy generated by the power generation equipment in the external power grid and reducing the probability that the excess electric energy cannot be consumed by users in time and occupies the distribution line.

[0053] The steam generator 4 is also connected between the high-temperature molten salt tank 2 and the low-temperature molten salt tank 1 through a pipeline. At the same time, the second cavity 42 of the steam generator 4 is used to accommodate the molten salt medium with a higher temperature pumped from the high-temperature molten salt tank 2, and the circulating water in the first cavity 41 is heated by heat exchange using the molten salt medium with a higher temperature, thereby heating the circulating water in the first cavity 41 into high-temperature water vapor.

[0054] The high-temperature water vapor is transferred to the power generation module 5 through a pipeline, and the kinetic energy of the high-temperature water vapor is used to drive the power generation module 5 to do work to generate electrical energy, and the electrical energy is uploaded to the power grid, thereby supplementing the power demand of the external power grid that is difficult to meet due to the influence of external natural conditions on the power of the power generation equipment, and supplementing the output power of the wind power generation equipment or the photovoltaic power generation equipment, so as to realize power supply to the load in the external power grid when the external load demand is large.

[0055] At the same time, the high-temperature steam gradually cools down after passing through the power generation module 5, and the cooled circulating water is transferred to the first cavity 41 of the steam generator 4 by pumping, thereby improving the utilization rate of the circulating water and reducing the probability of water resources being wasted.

[0056] The control module 6 can be set as an MCU controller, which can receive the output power of the power generation equipment collected from the external power grid, obtain the load demand power of the external power grid, and compare the collected output power of the power generation equipment with the load demand power of the external power grid.

[0057] When the load demand power of the external power grid is less than the output power of the power generation equipment, that is, the electric energy provided by the power generation equipment in the external power grid cannot be completely consumed by the load, therefore, the control module 6 outputs a control signal to control the molten salt electric heater 3 to receive the electric energy of the external power grid, thereby achieving the purpose of using the molten salt electric heater 3 to consume the output electric energy of the power generation equipment in the external power grid.

[0058] When the load demand power of the external power grid is greater than or equal to the output power of the power generation equipment, that is, the electric energy provided by the power generation equipment in the external power grid cannot meet the power consumption of the load, therefore, the control module 6 outputs a control signal to control the power generation module 5 to generate electric energy using the thermal energy of the molten salt medium, and transmits the generated electric energy to the external power grid for use by the load in the external power grid.

[0059] In a possible implementation, the method further includes:

[0060] The load prediction module 7 is connected to the control module 6 and the external power grid, and is used to collect historical load data of the external power grid, use a pre-built load prediction model to predict the load demand power of the external power grid, and transmit the prediction result to the control module 6.

[0061] The load prediction model is a model for predicting the load of the external power grid by utilizing the historical load data of the external power grid and the acquisition time, and constructing it using a reinforcement learning algorithm. The load prediction model uses the historical load data of the external power grid as a reference database, and predicts the load demand power of the external power grid based on the real-time load power of the external power grid at the current moment, and transmits the predicted load demand power to the control module 6, so that the control module 6 can control the working status of the molten salt electric heater 3 and the power generation module 5.

[0062] In a possible implementation, the power generation module 5 includes:

[0063] The steam turbine 51 is connected to the first cavity 41 of the steam generator 4 through a pipeline, and is used to drive its own rotating shaft to rotate by using the steam in the first cavity 41 of the steam generator 4;

[0064] A generator 52, connected to the rotating shaft of the steam turbine 51, for generating electricity driven by the rotating shaft of the steam turbine 51;

[0065] The condenser 53 is connected to the first cavity 41 of the steam generator 4 and the steam turbine 51 , and is used to condense steam into circulating water and pump the circulating water to the first cavity 41 of the steam generator 4 .

[0066] After the steam generator 4 generates water vapor, it is transmitted to the impeller of the steam turbine 51 through a pipeline, thereby driving the impeller of the steam turbine 51 to rotate. Then, the rotational torque of the steam turbine 51 drives the shaft of the generator 52 to rotate through gear transmission. The shaft of the generator 52 generates electrical energy by cutting magnetic lines of flux and uploads it to the external power grid.

[0067] In order to improve the utilization rate of the high-temperature steam generated by the steam generator 4 after the power generation module 5 generates electricity, the water vapor whose temperature is reduced after driving the rotating shaft of the steam turbine 51 is transported to the condenser 53 through a pipeline, condensed into circulating water at the condenser 53, and transferred to the first cavity 41 of the steam generator 4 through a pipeline, so as to facilitate the recycling of the circulating water.

[0068] In a possible implementation, the power generation module 5 further includes:

[0069] The waste heat recovery unit 54 has one end disposed around the periphery of the steam turbine 51 and the other end connected to the first cavity 41 of the steam generator 4 for heating the circulating water by utilizing the heat energy around the steam turbine 51 .

[0070] The waste heat recovery unit 54 can be implemented as a surrounding pipe. When the high-temperature steam drives the impeller of the steam turbine 51 to rotate, a large amount of heat will be released around the steam turbine 51. The circulating water in the first cavity 41 of the steam generator 4 is heated by the waste heat recovery unit 54 arranged around the steam turbine 51, thereby realizing the recovery and utilization of the heat dissipated around the steam turbine 51.

[0071] In a possible implementation, the condenser 53 is connected to a water replenishment channel 55 , and a water replenishment pump 56 is installed on the water replenishment channel 55 .

[0072] For example, the escape of part of the high-temperature steam after driving the steam turbine 51 to rotate will cause a decrease in the circulating water in the first cavity 41 of the steam generator 4, which will further cause the steam generator 4 to be unable to generate sufficient high-temperature steam to drive the steam turbine 51 to rotate. In this regard, a water supply channel 55 is provided on the condenser 53. After the water level in the first cavity 41 of the steam generator 4 is lowered, the water supply pump 56 replenishes the external tap water into the first cavity 41 of the steam generator 4 along the water supply channel 55.

[0073] In a possible implementation, the first cavity 41 and the second cavity 42 of the steam generator 4 are both spiral, and the first cavity 41 and the second cavity 42 are intertwined and arranged in parallel.

[0074] In order to ensure heat exchange between the high-temperature molten salt medium in the second cavity 42 and the circulating water in the first cavity 41, the first cavity 41 and the second cavity 42 are set to a double helix structure similar to DNA, which can not only increase the length of the first cavity 41 and the second cavity 42, but also ensure that the gap between the first cavity 41 and the second cavity 42 remains constant, thereby achieving the purpose of heating the circulating water with the high-temperature molten salt medium.

[0075] In a possible implementation, a filter unit 57 is further connected to the first cavity 41 of the steam generator 4 where it is connected to the condenser 53 . The filter unit 57 is used to filter out impurities in the circulating water condensed by the condenser 53 .

[0076] Since high-temperature steam will carry impurities inside the pipeline during transportation through the pipeline, in order to prevent impurities from entering the steam generator 4 and causing scale to be generated in the steam generator 4, the impurities in the circulating water are filtered through the filter unit 57. The filter unit 57 can be implemented as a filter tank with an activated carbon filter element, which is connected to the first cavity 41 of the steam generator 4 and connected to the side of the condenser 53 through a pipeline connection.

[0077] Reference Figure 3 , in a possible implementation, further comprising:

[0078] The detection module 8 is connected between the molten salt electric heater 3 and the control module 6 , and is used for detecting the operating data of the molten salt electric heater 3 and transmitting the operating data to the control module 6 .

[0079] The detection module 8 can obtain the operating data of the molten salt electric heater 3 by detecting the operating temperature of the molten salt electric heater 3. The detection module 8 collects the operating data of the molten salt electric heater 3 and transmits the operating data to the control module 6, thereby facilitating the control module 6 to monitor in real time whether the molten salt electric heater 3 is working normally, thereby reducing the probability of failure of the entire system due to abnormal operation of the molten salt electric heater 3.

[0080] In a possible implementation, the detection module 8 includes:

[0081] A temperature detection unit 81 is used to monitor the temperature data in the molten salt electric heater 3 in real time;

[0082] A data comparison unit 82 is used to compare the temperature data acquired in real time by the temperature detection unit 81 based on the temperature data acquired by the temperature detection unit 81 at the last moment;

[0083] The data transmission unit 83 is used to transmit the temperature data monitored by the temperature detection unit 81 and the comparison result of the data comparison unit 82 to the control module 6 .

[0084] The temperature detection unit 81 can be implemented as a temperature sensor, which is used to collect the real-time working temperature of the molten salt electric heater 3, and transmit the real-time working temperature of the molten salt electric heater 3 to the data comparison unit 82 for comparison. The data comparison unit 82 compares the temperature data obtained at the previous moment and the temperature data obtained in real time, and then uses the data transmission unit 83 to transmit the obtained data to the control module 6, so that the control module 6 obtains the working status of the molten salt electric heater 3.

[0085] In a possible implementation, the method further includes:

[0086] The alarm module 9 is connected to the control module 6 and is used to generate a warning signal when there is an abnormality in the temperature data monitored by the temperature detection unit 81 or the comparison result of the data comparison unit 82 received by the control module 6 .

[0087] The alarm module 9 can be implemented as a warning light or an alarm bell, and is connected to the control module 6 via an electrical signal.

[0088] When the control module 6 detects that there is an abnormality in the operating data of the molten salt electric heater 3, if the molten salt electric heater 3 continues to be used to obtain electric energy from the external power grid and heat the molten salt medium, it may cause the molten salt medium in the molten salt electric heater 3 to leak or become blocked. The alarm module 9 generates a warning signal in time, thereby reminding the on-duty personnel to promptly troubleshoot the fault of the molten salt electric heater 3 to ensure safe and stable operation of the system.

[0089] This application can at least achieve the following functions:

[0090] 1. Timely consume the electric energy output by the power generation equipment in the external power grid, use the molten salt electric heater 3 to receive the electric energy output by the power generation equipment in the external power grid under the control of the control module 6, and convert the electric energy in the external power grid into the heat energy of the molten salt medium, so as to realize the storage of the excess electric energy generated by the wind power generation and photovoltaic power generation equipment, and reduce the situation that the electric energy generated by the wind power generation and photovoltaic power generation equipment cannot be consumed, resulting in the waste of electric energy resources;

[0091] 2. To supplement the load power demand of the external power grid, the steam generator 4 is used to generate steam under the heating of the molten salt medium in the high-temperature molten salt tank 2, and the power generation module 5 is used to convert the kinetic energy of the steam into electrical energy, and the electrical energy is input into the external power grid, thereby supplementing the load power demand of the external power grid;

[0092] 3. A high-temperature molten salt tank 2 and a low-temperature molten salt tank 1 are provided for storing molten salt medium. The high-temperature molten salt tank 2 is used to store the heated molten salt medium, and the low-temperature molten salt tank 1 is used to store the cooled molten salt medium, so as to realize classified storage of the molten salt medium and improve the convenience of using the thermal energy of the molten salt medium to store excess electric energy in the external power grid.

[0093] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other. Each embodiment focuses on the differences from other embodiments.

[0094] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit the present application. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present application.

Claims

1. A molten salt energy storage power generation phase adjustment system, characterized in that: include: A low-temperature molten salt tank (1), used for containing a low-temperature molten salt medium; A high-temperature molten salt tank (2), used for containing a high-temperature molten salt medium; The molten salt electric heater (3) is connected to the low-temperature molten salt tank (1) and the high-temperature molten salt tank (2) and is used to heat the molten salt medium using the electric energy in the external power grid. The low-temperature molten salt medium in the low-temperature molten salt tank (1) is heated by the molten salt electric heater (3) to form a high-temperature molten salt medium which is pumped into the high-temperature molten salt tank (2); A steam generator (4), comprising a first cavity (41) storing circulating water and a second cavity (42) communicating with a molten salt medium, wherein the second cavity (42) is communicated with the high-temperature molten salt tank (2) and the low-temperature molten salt tank (1), and the steam generator (4) is used to utilize the temperature of the high-temperature molten salt medium of the high-temperature molten salt tank (2) in the second cavity (42) to heat the circulating water in the first cavity (41) to generate steam; A power generation module (5) is used to convert the kinetic energy of the steam generated by the steam generator (4) into electrical energy, and transmit the electrical energy to an external power grid; The control module (6) is used to control the molten salt electric heater (3) to receive electric energy from the external power grid and heat the molten salt medium when the load demand power of the external power grid is less than the output power of the power generation equipment, and to control the power generation module (5) to supply power to the external power grid when the load demand power of the external power grid is greater than or equal to the output power of the power generation equipment.

2. A molten salt energy storage power generation phase modulation system according to claim 1, characterized in that: Also includes: A load prediction module (7) is connected to the control module (6) and the external power grid, and is used to collect historical load data of the external power grid, use a pre-built load prediction model to predict the load demand power of the external power grid, and transmit the prediction result to the control module (6).

3. A molten salt energy storage power generation phase modulation system according to claim 1, characterized in that: The power generation module (5) comprises: A steam turbine (51) is connected to the first cavity (41) of the steam generator (4) through a pipeline and is used to drive its own rotating shaft to rotate by using the steam in the first cavity (41) of the steam generator (4); A generator (52) connected to the rotating shaft of the steam turbine (51) and used to generate electricity driven by the rotating shaft of the steam turbine (51); A condenser (53) is connected to the first cavity (41) of the steam generator (4) and the steam turbine (51), and is used to condense steam into circulating water and pump it to the first cavity (41) of the steam generator (4).

4. A molten salt energy storage power generation phase modulation system according to claim 3, characterized in that: The power generation module (5) further comprises: A waste heat recovery unit (54) is disposed at one end around the periphery of the steam turbine (51) and connected to the first cavity (41) of the steam generator (4) at the other end, and is used to heat circulating water using heat energy from the periphery of the steam turbine (51).

5. A molten salt energy storage power generation phase modulation system according to claim 3, characterized in that: The condenser (53) is connected to a water replenishment channel (55), and a water replenishment pump (56) is installed on the water replenishment channel (55).

6. A molten salt energy storage power generation phase modulation system according to claim 1, characterized in that: The first cavity (41) and the second cavity (42) of the steam generator (4) are both in the form of spirals, and the first cavity (41) and the second cavity (42) are intertwined and arranged in parallel.

7. A molten salt energy storage power generation phase modulation system according to claim 6, characterized in that: The first cavity (41) of the steam generator (4) is also connected to a filter unit (57) at the point where it is connected to the condenser (53). The filter unit (57) is used to filter out impurities in the condensation circulating water of the condenser (53).

8. The molten salt energy storage power generation phase modulation system according to claim 1, characterized in that: Also includes: The detection module (8) is connected between the molten salt electric heater (3) and the control module (6), and is used to detect the operating data of the molten salt electric heater (3) and transmit the operating data to the control module (6).

9. A molten salt energy storage power generation phase modulation system according to claim 8, characterized in that: The detection module (8) comprises: A temperature detection unit (81) for monitoring temperature data in the molten salt electric heater (3) in real time; A data comparison unit (82) is used to compare the temperature data acquired in real time by the temperature detection unit (81) based on the temperature data acquired by the temperature detection unit (81) at a previous moment; A data transmission unit (83) is used to transmit the temperature data monitored by the temperature detection unit (81) and the comparison result of the data comparison unit (82) to the control module (6).

10. A molten salt energy storage power generation phase modulation system according to claim 9, characterized in that: Also includes: An alarm module (9) is connected to the control module (6) and is used to generate a warning signal when an abnormality exists in the temperature data monitored by the temperature detection unit (81) or the comparison result of the data comparison unit (82) received by the control module (6).

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