A multi-purpose electric heat storage control system

Abstract

The present invention discloses a multi-purpose electric heat storage control system. The system includes: a first heat storage module, a first switch module, a gas power generation module, a second switch module, a fuel power generation module, and a control module; when the actual average power generation of the gas power generation module is greater than the first grid load during the off-peak electricity price period in a day, the control module controls the first switch module to conduct; when the actual average power generation of the gas power generation module is equal to the first grid load, the control module controls the first switch module to disconnect; also during the peak electricity price period in a day, when the actual average power generation of the gas power generation module is greater than the first grid load, the control module controls the first heat storage module to output steam to the gas power generation module and output hot water to the external heating system; the control module also controls the second switch module to conduct when the actual average power generation of the gas power generation module is equal to the first grid load during the off-peak electricity price period in a day and the actual average power generation of the fuel power generation module is greater than the second grid load.

Description

Technical Field

[0001] An embodiment of the present invention relates to the technical field of heat storage, and particularly to a multi-purpose electric heat storage control system. Background Art

[0002] Power balance is determined by both grid power consumption and power supply from power plants. Since power generation and consumption occur simultaneously, the power generation amount is not necessarily exactly equal to the power consumption amount. The active load and reactive load of the power system often change. Therefore, the balance is often broken, and efforts need to be made to achieve balance again. So, power balance is dynamic, achieving a temporary balance in the imbalance and is also an important measure to alleviate the contradiction between power supply and demand to a certain extent. Power balance realizes the power balance between power generation and consumption, which is related to the power quality of the power grid and the safe, stable, reliable, and economic operation of the power system. Currently, there is an imbalance problem between the power generation of each power plant and the grid load at different times of the day in the power grid, resulting in poor stability of the power grid. Summary of the Invention

[0003] The present invention provides a multi-purpose electric heat storage control system to achieve the balance between the power generation of each power plant and the grid load at different times of the day through the electric heat storage control system, thereby enabling the stable operation of the power grid; in addition, the heating demand can also be met through the electric heat storage control system.

[0004] To achieve the above object, an embodiment of the present invention provides a multi-purpose electric heat storage control system, which includes: a first heat storage module, a first switch module, a gas power generation module, a second switch module, a fuel power generation module, and a control module;

[0005] The gas power generation module is coupled to the power grid through a first transmission line; the first end of the first switch module is connected to the first transmission line; the second end of the first switch module is connected to the power supply end of the first heat storage module; the fuel power generation module is coupled to the power grid through a second transmission line; the first end of the second switch module is connected to the power grid; the second end of the second switch module is connected to the power supply end of the first heat storage module;

[0006] The control module is configured to control the first switch module to conduct when the actual average power generation of the gas power generation module is greater than the first load of the power grid during the off-peak electricity price period within a day, so that the first heat storage module draws power from the gas power generation module for heat storage; and is further configured to control the first switch module to disconnect when the actual average power generation of the gas power generation module is equal to the first load of the power grid during the off-peak electricity price period within a day; and is further configured to control the first heat storage module to output steam to the gas power generation module to adjust the power generation efficiency of the gas power generation module and output hot water to the external heating system when the actual average power generation of the gas power generation module is less than the first load of the power grid during the peak electricity price period within a day.

[0007] The control module is further configured to control the second switch module to conduct when the actual average power generation of the gas power generation module is equal to the first load of the power grid and the actual average power generation of the fuel power generation module is greater than the second load of the power grid during the off-peak electricity price period within a day.

[0008] Optionally, the system further includes: a third switch module and a second heat storage module;

[0009] The first end of the third switch module is connected to the first transmission line; the second end of the third switch module is electrically connected to the power supply end of the second heat storage module;

[0010] The control module is further configured to output a frequency reduction command to the third switch module to make the third switch module conduct when the actual real-time output power generation frequency of the gas power generation module is greater than the real-time first load frequency of the power grid during different electricity consumption stages within a day; and is further configured to control the third switch module to disconnect when the actual real-time output power generation frequency of the gas power generation module is equal to the real-time first load frequency of the power grid during different electricity consumption stages within a day; and is further configured to control the second heat storage module to output steam and hot water when the second heat storage module is greater than a preset temperature.

[0011] Optionally, the first heat storage module includes a first heat storage unit, a first heat exchanger, a first steam-water separator, and a second heat exchanger;

[0012] The first heat storage unit includes a first cold air inlet channel, a second cold air inlet channel, a first low-temperature hot air outlet duct, and a first high-temperature hot air outlet duct; the first low-temperature hot air outlet duct is communicated with the first inlet of the first heat exchanger; the second inlet of the first heat exchanger is communicated with the condensate water system; the first outlet of the first heat exchanger is communicated with the low-temperature return air duct; the second outlet of the first heat exchanger is connected to the inlet of the first steam-water separator;

[0013] The first outlet of the first steam separator is communicated with the first inlet of the second heat exchanger; the second inlet of the second heat exchanger is communicated with the first high-temperature hot air outlet air duct; the first outlet of the second heat exchanger outputs steam; the second outlet of the second heat exchanger is communicated with the high-temperature return air duct; the second outlet of the first steam separator is communicated with an external heating system; the low-temperature return air duct and the high-temperature return air duct are respectively communicated with the first cold air inlet channel and the second cold air inlet channel.

[0014] Optionally, the first heat storage unit includes a plurality of first heat storage bodies and a plurality of first fans; the first heat storage body includes the first sub-cold air channel, the first sub-low-temperature hot air outlet air duct and the first sub-high-temperature hot air outlet air duct;

[0015] Each of the first sub-low-temperature hot air outlet air ducts is communicated to form the first low-temperature hot air outlet air duct; each of the first sub-high-temperature hot air outlet air ducts is communicated to form the first high-temperature hot air outlet air duct;

[0016] The outlet of the first fan is communicated with the first sub-cold air channel; the first inlet of the first fan serves as the first cold air inlet channel and is communicated with the low-temperature return air duct; the second inlet of the first fan serves as the second cold air inlet channel and is communicated with the high-temperature return air duct.

[0017] Optionally, the second heat storage module includes a second heat storage unit, a third heat exchanger, a second steam separator and a fourth heat exchanger;

[0018] The second heat storage unit includes a third cold air inlet channel, a fourth cold air inlet channel, a second low-temperature hot air outlet air duct and a second high-temperature hot air outlet air duct; the second low-temperature hot air outlet air duct is communicated with the first inlet of the third heat exchanger; the second inlet of the third heat exchanger is communicated with a condensate system; the first outlet of the third heat exchanger is communicated with the low-temperature return air duct; the second outlet of the third heat exchanger is connected to the inlet of the second steam separator;

[0019] The first outlet of the second steam separator is communicated with the first inlet of the fourth heat exchanger; the second inlet of the fourth heat exchanger is communicated with the second high-temperature hot air outlet air duct; the first outlet of the fourth heat exchanger outputs steam; the second outlet of the fourth heat exchanger is communicated with the high-temperature return air duct; the second outlet of the second steam separator is communicated with an external heating system; the low-temperature return air duct and the high-temperature return air duct are respectively communicated with the third cold air inlet channel and the fourth cold air inlet channel.

[0020] Optionally, the second heat storage unit includes a plurality of second heat storage bodies and a plurality of second fans; each second heat storage body includes a second sub-cold air channel, a second sub-low-temperature hot air outlet air duct, and a second sub-high-temperature hot air outlet air duct;

[0021] Each of the second sub-low-temperature hot air outlet air ducts communicates to form the second low-temperature hot air outlet air duct; each of the second sub-high-temperature hot air outlet air ducts communicates to form the second high-temperature hot air outlet air duct;

[0022] The outlet of the second fan communicates with the second sub-cold air channel; the first inlet of the second fan serves as the third cold air inlet channel and communicates with the low-temperature return air duct; the second inlet of the second fan serves as the fourth cold air inlet channel and communicates with the high-temperature return air duct.

[0023] The outlet of the second fan communicates with the second sub-cold air channel; the first inlet of each second fan communicates with the low-temperature return air duct; the second inlet of each second fan communicates with the high-temperature return air duct.

[0024] Optionally, the first heat storage body and the second heat storage body are integrally designed, and the first heat storage body and the second heat storage body are stacked up and down through an insulating board.

[0025] Optionally, the first fan and the second fan are integrally designed; the first sub-cold air channel and the second sub-cold air channel are integrally designed; the first sub-low-temperature hot air outlet air duct and the second sub-low-temperature hot air outlet air duct are integrally designed; the first sub-high-temperature hot air outlet air duct and the second sub-high-temperature hot air outlet air duct are integrally designed; the first low-temperature hot air outlet air duct and the second low-temperature hot air outlet air duct are integrally designed; the first high-temperature hot air outlet air duct and the second high-temperature hot air outlet air duct are integrally designed.

[0026] Optionally, a valve is provided at the second sub-cold air channel of each second heat storage body.

[0027] Optionally, the gas power generation module includes a steam turbine, a generator, and a transformer; the steam turbine, the generator, and the transformer are sequentially coupled.

[0028] In an embodiment of the present invention, a gas power generation module is coupled to a power grid through a first transmission line; a first end of a first switch module is connected to the first transmission line; a second end of the first switch module is connected to a power supply end of a first heat storage module; thus, when the control module is in the low electricity price stage within a day and the actual average power generation of the gas power generation module is greater than the first load of the power grid in the corresponding stage, the control module controls the first switch module to conduct, so that the first heat storage module draws power from the gas power generation module for heat storage, thus avoiding the imbalance between the gas power generation module and the power grid caused by too large a deviation between the actual average power generation of the gas power generation module and the first load of the power grid; until the actual average power generation of the gas power generation module is equal to the first load of the power grid, the control module controls the first switch module to disconnect; at the same time, when the control module is in the peak electricity price stage within a day and the actual average power generation of the gas power generation module is greater than the first load of the power grid in the corresponding stage, the control module controls the first heat storage module to output steam to the gas power generation module, so as to adjust the power generation efficiency of the gas power generation module in the current stage, thus meeting the higher first load of the power grid in the current stage and outputting hot water to an external heating system; thus, the balance between the gas power generation module and the first load of the power grid at different stages of a day is satisfied;

[0029] Considering that the power grid is also connected to other fuel power generation modules; the fuel power generation module is coupled to the power grid through a second transmission line; a first end of a second switch module is connected to the power grid; a second end of the second switch module is connected to the power supply end of the first heat storage module; thus, when the control module is in the low electricity price stage within a day and the actual average power generation of the gas power generation module is equal to the first load of the power grid, and the actual average power generation of the fuel power generation module is greater than the second load of the power grid, the control module controls the second switch module to conduct, so that the first heat storage module can be used as a load on the power grid side, and is added to the second load of the power grid, so as to balance the power generation of the fuel power generation module, thus meeting the balance between the fuel power generation module and the second load of the power grid at different stages of a day; thus, the balance between each power generation module and all loads of the power grid is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic structural diagram of a multi-purpose electric heat storage control system provided by an embodiment of the present invention;

[0031] Figure 2 is a schematic structural diagram of another multi-purpose electric heat storage control system provided by an embodiment of the present invention;

[0032] Figure 3 is a schematic structural diagram of the first heat storage module provided in an embodiment of the present invention;

[0033] Figure 4 is a specific schematic structural diagram of the first heat storage module provided in an embodiment of the present invention;

[0034] Figure 5It is a schematic structural diagram of the second heat storage module provided in the embodiment of the present invention;

[0035] Figure 6 It is a specific structural schematic diagram of the second heat storage module provided in the embodiment of the present invention;

[0036] Figure 7 It is a specific structural schematic diagram of the integration of the first heat storage module and the second heat storage module provided in the embodiment of the present invention. Specific implementation manners

[0037] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the sake of description, only the parts related to the present invention rather than all the structures are shown in the drawings.

[0038] Figure 1 It is a schematic structural diagram of a multi-purpose electric heat storage control system provided in the embodiment of the present invention; as Figure 1 shown, the system includes: a first heat storage module 10, a first switch module 20, a gas power generation module 30, a second switch module 40, a fuel power generation module 50, and a control module 60;

[0039] The gas power generation module 30 is coupled to the power grid through a first power line L1; the first end of the first switch module 20 is connected to the first power line L1; the second end of the first switch module 20 is connected to the power supply end of the first heat storage module 10; the fuel power generation module 50 is coupled to the power grid through a second power line L2; the first end of the second switch module 40 is connected to the power grid; the second end of the second switch module 40 is connected to the power supply end of the first heat storage module 10;

[0040] The control module 60 is configured to control the first switch module 20 to conduct so that the first heat storage module 10 draws power for heat storage from the gas power generation module 30 when the actual average power generation of the gas power generation module 30 is greater than the first load of the power grid during the valley electricity price stage within a day; and is further configured to control the first switch module 20 to disconnect when the actual average power generation of the gas power generation module 30 is equal to the first load of the power grid during the valley electricity price stage within a day; and is further configured to control the first heat storage module 10 to output steam to the gas power generation module 30 to adjust the power generation efficiency of the gas power generation module 30 and output hot water to an external heating system when the actual average power generation of the gas power generation module 30 is less than the first load of the power grid during the peak electricity price stage within a day;

[0041] The control module 60 is further configured to control the second switch module 40 to conduct when, during the off-peak electricity price period of a day, the actual average power generation of the gas power generation module 30 is equal to the first grid load and the actual average power generation of the fuel power generation module 50 is greater than the second grid load.

[0042] Among them, the first heat storage module 10 can complete heat storage when powered, and output hot steam and hot water under the action of cold air after heat storage; the first switch module 20 and the second switch module 40 are any modules that can be conducted or turned off; they can be single-pole single-throw switches; the gas power generation module 30 is a module that can complete the power generation function under the drive of gas, that is, a module that converts wind energy into electrical energy; the fuel power generation module 50 is a module that converts chemical energy into electrical energy.

[0043] The first grid load is the required power generation of the gas power generation module 30 by the grid according to the current electricity load demand; generally, the electricity load demands of the grid in different stages of a day are different, so the required power generation of the gas power generation module is also different, that is, the first grid load in different stages of a day is different; different stages of a day include the off-peak electricity price period and the peak electricity price period; usually, the first grid load in the off-peak electricity price period is smaller than the actual average power generation of the gas power generation module, and the first load in the peak electricity price period is larger than the actual average power generation of the gas power generation module.

[0044] In fact, when there is no change in any parameters of the gas power generation module, the average power generation at each moment in different stages is almost the same; the actual average power generation of the gas power generation module is the average power generation at each moment in any stage; the imbalance between the first grid load and the actual average power generation of the gas power generation module in the off-peak electricity price period will cause grid instability; the imbalance between the first load and the actual average power generation of the gas power generation module in the peak electricity price period will cause grid instability.

[0045] The second grid load is the required power generation of the fuel power generation module 50 by the grid according to the current load demand; similarly, the second grid load in different stages of a day is different; generally, the second grid load in the off-peak electricity price period is smaller than the actual average power generation of the fuel power generation module 50, and the second load in the peak electricity price period is larger than the actual average power generation of the fuel power generation module 50.

[0046] The actual average power generation of the fuel power generation module 50 is the average power generation at each moment in different stages; in fact, when there is no change in any parameters of the fuel power generation module, the average power generation at each moment in different stages is almost the same; then the imbalance between the second grid load and the actual average power generation of the fuel power generation module in the off-peak electricity price period will cause grid instability; the imbalance between the first load and the actual average power generation of the fuel power generation module in the peak electricity price period will cause grid instability.

[0047]

[0047] In order to solve the above specific problems, in the embodiment of the present invention, the gas power generation module 30 is coupled to the power grid through the first transmission line L1; the first end of the first switch module 20 is connected to the first transmission line; the second end of the first switch module 20 is connected to the power supply end of the first heat storage module 10; in this way, when the actual average power generation amount of the gas power generation module 30 is greater than the first load of the power grid during the low electricity price period in a day, the control module 60 controls the first switch module 20 to conduct, so that the first heat storage module 10 draws power from the gas power generation module 30 for heat storage, thus avoiding the imbalance between the gas power generation module 30 and the power grid caused by the too large deviation between the actual average power generation amount of the gas power generation module 30 and the first load of the power grid; until the actual average power generation amount of the gas power generation module 30 is equal to the first load of the power grid, the control module 60 controls the first switch module 20 to disconnect; at the same time, when the control module 60 is in the high electricity price period in a day, it controls the first heat storage module 10 to output steam to the gas power generation module 30, so as to adjust the power generation efficiency of the gas power generation module 30 in the current period, so as to meet the higher first load of the power grid in the current period, and output hot water to the external heating system; in this way, the balance between the gas power generation module 30 and the first load of the power grid at different stages of a day is satisfied;

[0048]

[0048] In addition, the fuel power generation module 50 is coupled to the power grid through the second transmission line; the first end of the second switch module 40 is connected to the power grid; the second end of the second switch module 40 is also connected to the power supply end of the first heat storage module 10; in this way, during the low electricity price period in a day, when the actual average power generation amount of the gas power generation module is equal to the first load of the power grid and the actual average power generation amount of the fuel power generation module 50 is greater than the second load of the power grid, the control module 60 controls the second switch module 40 to conduct, so that the first heat storage module 10 can also be used as a load on the power grid side, and added to the second load of the power grid, so as to balance the power generation amount of the fuel power generation module, thus satisfying the balance between the fuel power generation module 50 and the second load of the power grid at different stages of a day; in this way, the balance between each power generation module and all loads of the power grid is realized through the first heat storage module 10.

[0049]

[0049] In addition, it should be noted that the heat storage capacity of the first heat storage module 10 has a maximum limit. When the temperature of the first heat storage module 10 reaches the upper limit value, in order to protect the first heat storage module 10, the first switch module 20 and the second switch module 40 need to be disconnected in time to avoid damaging the first heat storage module 10.

[0050]

[0050] Optionally, on the basis of the above embodiment, the above embodiment is further optimized. Figure 2 Figure 2 This is a schematic structural diagram of another multi-purpose electric heat storage control system provided by the embodiment of the present invention; as Figure 2As shown, the system further includes: a third switch module 70 and a second heat storage module 80; a first end of the third switch module 70 is connected to the first transmission line L1; a second end of the third switch module 70 is electrically connected to a power supply end of the second heat storage module 80;

[0051] The control module 60 is further configured to output a frequency reduction command to the third switch module 70 to turn on the third switch module 70 when the actual real-time output power generation frequency of the gas power generation module 30 is greater than the real-time grid first load frequency at different power consumption stages within a day; and is further configured to control the third switch module 70 to disconnect when the actual real-time output power generation frequency of the gas power generation module is equal to the real-time grid first load frequency at different power consumption stages within a day; and is further configured to control the second heat storage module 80 to output steam and hot water when the second heat storage module 80 is greater than a preset temperature.

[0052] Wherein, at different power consumption stages within a day, the output power generation amount after adjusting the gas power generation module 30 through the first switch module 20 also has a certain fluctuation; that is, the actual real-time output power generation frequency; considering that the actual first load of the grid will have a certain allowable fluctuation frequency at different power consumption stages, such as 50 Hz; when the actual real-time output power generation frequency does not match the grid first load frequency, it will also affect the stability of the grid; in this embodiment, when the actual real-time output power generation frequency of the gas power generation module 30 is greater than the real-time grid first load frequency at different power consumption stages within a day, a frequency reduction command is output to the third switch module 70, so that the third switch module 70 is turned on, which can finely adjust the output power generation amount of the gas power generation module 30, thereby maintaining the real-time grid first load frequency, so that the power generation amount of the gas power generation module 30 can be adjusted more precisely within each power consumption stage, thereby maintaining the stability of the grid frequency.

[0053] When the actual real-time output power generation frequency of the gas power generation module is equal to the real-time grid first load frequency at different power consumption stages within a day, control the third switch module 70 to disconnect; considering the maximum heat storage capacity that the second heat storage module 80 can withstand, and at the same time when the second heat storage module 80 is greater than the preset temperature, control the second heat storage module 80 to output steam and hot water, and the hot water can thus meet the heating system, so that the power generation efficiency of the gas power generation module 30 can be jointly adjusted with the first heat storage module 10 during the peak electricity price stage within a day.

[0054] It can be understood that in some embodiments, since the second heat storage module can meet the frequency modulation requirements of the grid at each power consumption stage, the cross-sectional area of the second heat storage module can be smaller than the cross-sectional area of the first heat storage module. The second heat storage module can be a 6KV heat storage module; the first heat storage module can be a 35KV heat storage module; at this time, since the heat storage capacity of the second heat storage module is poorer than that of the first heat storage module, the second heat storage module can only output steam at this time.

[0055] Optionally, based on the above embodiments, each module is further refined. Figure 3 It is a schematic structural diagram of the first heat storage module provided by an embodiment of the present invention; as Figure 3 shown, the first heat storage module 10 includes a first heat storage unit 11, a first heat exchanger 12, a first steam-water separator 13, and a second heat exchanger 14;

[0056] The first heat storage unit 11 includes a first cold air inlet channel A1, a second cold air inlet channel B1, a first low-temperature hot air outlet duct C1, and a first high-temperature hot air outlet duct D1; the first low-temperature hot air outlet duct C1 communicates with the first inlet of the first heat exchanger 12; the second inlet of the first heat exchanger 12 communicates with the condensate system; the first outlet of the first heat exchanger 12 communicates with the low-temperature return air duct E; the second outlet of the first heat exchanger 12 is connected to the inlet of the first steam-water separator 13;

[0057] The first outlet of the first steam-water separator 13 communicates with the first inlet of the second heat exchanger 14; the second inlet of the second heat exchanger 14 communicates with the first high-temperature hot air outlet duct D1; the first outlet of the second heat exchanger 14 outputs steam; the second outlet of the second heat exchanger 14 communicates with the high-temperature return air duct F; the second outlet of the first steam-water separator 13 communicates with the external heating system; the low-temperature return air duct E and the high-temperature return air duct communicate with the first cold air inlet channel A1 and the second cold air inlet channel B1 respectively.

[0058] Among them, the process of the first heat storage module 10 outputting steam is as follows: the condensate system flows condensate into the second inlet in the first heat exchanger 12. When the first heat storage unit 11 starts to work, it can heat the cold water in the first cold air inlet channel A1 and the second cold air inlet channel B1 to generate hot air. For independent control, specifically, the hot air that can be output in the first heat storage unit 11 is divided into low-temperature hot air and high-temperature hot air. In this way, the low-temperature hot air enters the first heat exchanger 12 through the first low-temperature hot air outlet duct C1, and thus can exchange heat with the condensate to generate a gas-water mixture; after the gas-water mixture is separated by the first steam-water separator 13, hot water and saturated steam can be generated; the saturated steam passes through the second heat exchanger 14. Since the high-temperature hot air enters the first high-temperature hot air outlet duct D1, the second heat exchanger 14 can exchange heat between the high-temperature hot air and the saturated steam, so that the second heat exchanger 14 generates superheated steam; in this way, the superheated steam can drive the gas power generation module 30 to work; the hot water generated after the separation by the first steam-water separator 13 can be used for the external heating system.

[0059] It should be noted that in this embodiment, the first heat storage unit 11 is divided into the first low-temperature hot air outlet duct C1 and the first high-temperature hot air outlet duct D1, so that independent control of the pressure and temperature of the superheated steam generated by the heat storage unit can be achieved.

[0060] Optionally, the first heat storage unit 11 is further refined to further explain that low-temperature hot air and high-temperature hot air can be output within the first heat storage unit 11; Figure 4 is a schematic structural diagram of the first heat storage module provided by an embodiment of the present invention; as Figure 4 shown, the first heat storage unit 11 includes a plurality of first heat storage bodies 111 and a plurality of first fans 112; each first heat storage body 111 includes a first sub-cold air channel 1111, a first sub-low-temperature hot air outlet duct 1112, and a first sub-high-temperature hot air outlet duct 1113; each first sub-low-temperature hot air outlet duct 1112 communicates to form a first low-temperature hot air outlet duct C1; each first sub-high-temperature hot air outlet duct 1113 communicates to form a first high-temperature hot air outlet duct D1. The outlet 1121 of the first fan 112 communicates with the first sub-cold air channel 1111; the first inlet 1122 of each first fan 112 serves as a cold air first inlet channel A1 and communicates with the low-temperature return air duct E; the second inlet 1123 of each first fan 112 serves as a cold air second inlet channel B1 and communicates with the high-temperature return air duct F.

[0061] Specifically, this embodiment explains that low-temperature hot air and high-temperature hot air can be output within the first heat storage unit 11; since the power supply ends of the first heat storage bodies all draw power from the gas power generation module, each first heat storage body 111 can reach a certain heat storage temperature. When the heat storage temperatures all reach a certain heat storage temperature, because the heat storage temperature is relatively high at this time, the speed of the first fan 112 corresponding to any one heat storage body 111 can be controlled to be relatively small, so that the hot air output by this heat storage body 111 is output from the first sub-high-temperature hot air outlet duct 1113 to the first high-temperature hot air outlet duct D1; while the speeds of the first fans corresponding to other heat storage bodies are relatively large, so that the hot air output by other heat storage bodies is output from the first sub-low-temperature hot air outlet duct 1112 to the first low-temperature hot air outlet duct C1; in this way, the low-temperature hot air enters the first heat exchanger 12 through the first low-temperature hot air outlet duct C1 and can exchange heat with the condensed water to generate a gas-water mixture; after the gas-water mixture is separated by the first steam-water separator 13, hot water and saturated steam can be generated; the saturated steam passes through the second heat exchanger 14, and since the high-temperature hot air enters the first high-temperature hot air outlet duct D1, the second heat exchanger 14 can exchange heat between the high-temperature hot air and the saturated steam, so that the second heat exchanger 14 generates superheated steam.

[0062] Optionally, based on the same design concept of the heat storage module, Figure 5 is a schematic structural diagram of a multi-purpose electric heat storage control system provided by an embodiment of the present invention; as Figure 5 shown, the second heat storage module 80 includes a second heat storage unit 81, a third heat exchanger 82, a second steam-water separator 83, and a fourth heat exchanger 84;

[0063] The second heat storage unit 81 includes a third cold air inlet channel A2, a fourth cold air inlet channel B2, a second low-temperature hot air outlet air duct C2, and a second high-temperature hot air outlet air duct D2; the second low-temperature hot air outlet air duct C2 communicates with the first inlet of the third heat exchanger 82; the second inlet of the third heat exchanger 82 communicates with the condensate system; the first outlet of the third heat exchanger 82 communicates with the low-temperature return air duct E; the second outlet of the third heat exchanger 82 is connected to the inlet of the second steam separator 83;

[0064] The first outlet of the second steam separator 83 communicates with the first inlet of the fourth heat exchanger 84; the second inlet of the fourth heat exchanger 84 communicates with the second high-temperature hot air outlet air duct D2; the first outlet of the fourth heat exchanger 84 outputs steam; the second outlet of the fourth heat exchanger 84 communicates with the high-temperature return air duct F; the second outlet of the second steam separator 83 communicates with the external heating system; the low-temperature return air duct E and the high-temperature return air duct F communicate with the third cold air inlet channel A2 and the fourth cold air inlet channel B2 respectively.

[0065] Wherein, the process of the second heat storage module 80 outputting steam when the temperature is higher than the preset temperature is as follows: the condensate system flows condensate into the second inlet in the third heat exchanger 82. When the second heat storage unit 81 starts to work, it can heat the cold water in the third cold air inlet channel A2 and the fourth cold air inlet channel B2 to generate hot air. For independent control, specifically, the hot air that can be output in the second heat storage unit 81 is divided into low-temperature hot air and high-temperature hot air. In this way, the low-temperature hot air enters the third heat exchanger 82 through the second low-temperature hot air outlet air duct C2, and can exchange heat with the condensate to generate a gas-water mixture; after being separated by the second steam separator 83, the gas-water mixture can generate hot water and saturated steam; the saturated steam passes through the fourth heat exchanger 84. Since the high-temperature hot air enters the second high-temperature hot air outlet air duct D2, the fourth heat exchanger 84 can exchange heat between the high-temperature hot air and the saturated steam, so that the fourth heat exchanger 84 generates superheated steam; thus, the superheated steam can drive the gas power generation module 30 to work.

[0066] Optionally, the second heat storage unit 81 is further refined, and the output of low-temperature hot air and high-temperature hot air in the second heat storage unit 81 is further described; Figure 6 is a schematic structural diagram of the second heat storage module provided by an embodiment of the present invention; as Figure 6As shown in the figure, the second heat storage unit 81 includes a plurality of second heat storage bodies 811 and a plurality of second air blowers 812; the second heat storage body 811 includes a second sub-cold air channel 8111, a second sub-low-temperature hot air outlet air duct 8112, and a second sub-high-temperature hot air outlet air duct 8113; each second sub-low-temperature hot air outlet air duct 8112 communicates to form a second low-temperature hot air outlet air duct C2; each second sub-high-temperature hot air outlet air duct 8113 communicates to form a second high-temperature hot air outlet air duct D2. The outlet 8121 of the second air blower 812 communicates with the first sub-cold air channel 1111; the first inlet 8122 of each second air blower 812 serves as a third cold air inlet channel A2 and communicates with the low-temperature return air duct E; the second inlet 8123 of each second air blower 812 serves as a fourth cold air inlet channel B2 and communicates with the high-temperature return air duct F.

[0067] Specifically, in this embodiment, the second heat storage unit 81 can output low-temperature hot air and high-temperature hot air for illustration; since the power supply ends of the second heat storage bodies 811 all draw power from the gas power generation module, each second heat storage body 811 can reach a certain heat storage temperature. When the heat storage temperature reaches a certain heat storage temperature (for example, the heat storage temperature is 600 °C), since the heat storage temperature is relatively high at this time, the speed of the second air blower corresponding to any one of the heat storage bodies 811 can be controlled to be relatively small, so that the hot air output from this heat storage body exits from the second sub-high-temperature hot air outlet air duct 8113 to the second high-temperature hot air outlet air duct D2; while the speeds of the second air blowers corresponding to the other heat storage bodies are relatively large, so that the hot air output from the other heat storage bodies is output from the second sub-low-temperature hot air outlet air duct 8112 to the second low-temperature hot air outlet air duct C2; in this way, the low-temperature hot air enters the third heat exchanger 82 through the second low-temperature hot air outlet air duct C2 and can exchange heat with the condensed water to generate a gas-water mixture; after the separation by the second steam-water separator 83, the gas-water mixture can generate hot water and saturated steam; the saturated steam passes through the fourth heat exchanger 84. Since the high-temperature hot air enters the second high-temperature hot air outlet air duct D2, the fourth heat exchanger 84 can exchange heat between the high-temperature hot air and the saturated steam, so that the fourth heat exchanger 84 generates superheated steam.

[0068] Optionally, in some other embodiments, Figure 7 is a schematic structural diagram of the integration of the first heat storage module and the second heat storage module provided by the embodiment of the present invention; as Figure 7 shown, the first heat storage body 111 and the second heat storage body 811 are integrally designed, and the first heat storage body 111 and the second heat storage body 811 are stacked up and down through an insulating board.

[0069] Integrated design of the first fan 112 and the second fan 812; integrated design of the first sub-cool air channel 1111 and the second sub-cool air channel 8111; integrated design of the first sub-high-temperature hot air outlet duct 1113 and the second sub-high-temperature hot air outlet duct 8113; integrated design of the first low-temperature hot air outlet duct C1 and the second low-temperature hot air outlet duct C2; integrated design of the first high-temperature hot air outlet duct D1 and the second high-temperature hot air outlet duct D2. That is, the first heat storage module and the second heat storage module are integrally designed. In this way, on the basis of completing the above heat storage, steam output and hot water output, the structural design of the electric heat storage control system is further simplified.

[0070] In addition, since the cross-sectional area of the first heat storage body 111 is larger than that of the second heat storage body 811, if the two heat storage bodies are arranged side by side, the air volume entering the second heat storage body 812 is small, and it is not easy to control the relevant air volume, resulting in heat accumulation. By stacking the first heat storage body 111 and the second heat storage body 811 vertically through an insulating plate, a chimney effect can be formed in the air duct of the second heat storage body 811, with hot air rising and cold air descending, reducing the influence of air duct air volume and wind resistance on the second heat storage body 811 side.

[0071] Optionally, in some other embodiments, valves are provided at the second sub-cool air channels of each second heat storage body 811. In this way, when each heat storage body 811 outputs superheated steam, the valves at the second sub-cool air channels of each second heat storage body can also be controlled to open.

[0072] Optionally, in some embodiments, the gas power generation module 30 includes a steam turbine, a generator and a transformer; the steam turbine, the transformer and the generator are sequentially coupled. In this way, the superheated steam output by each heat storage module is output to the steam turbine to drive the steam turbine to work, so that the gas generator generates a certain amount of electric energy, and finally the transformer converts this electric energy into electric energy of a certain voltage level and outputs it to the grid side.

[0073] Note that the above are only the preferred embodiments of the present invention and the applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described here, and various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments only. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A multi-purpose electric heat storage control system, characterized in that, Including: A first heat storage module, a first switch module, a gas power generation module, a second switch module, a fuel power generation module, and a control module; The gas power generation module is coupled to the power grid through a first transmission line; a first end of the first switch module is connected to the first transmission line; a second end of the first switch module is connected to a power supply end of the first heat storage module; the fuel power generation module is coupled to the power grid through a second transmission line; a first end of the second switch module is connected to the power grid; a second end of the second switch module is connected to the power supply end of the first heat storage module; The control module is configured to, during the low electricity price period in a day, when the actual average power generation of the gas power generation module is greater than the first load of the power grid in the corresponding period, control the first switch module to conduct so that the first heat storage module draws power from the gas power generation module for heat storage; and is also configured to, during the low electricity price period in a day, when the actual average power generation of the gas power generation module is equal to the first load of the power grid, control the first switch module to disconnect; and is further configured to, during the peak electricity price period in a day, when the actual average power generation of the gas power generation module is less than the first load of the power grid in the corresponding period, control the first heat storage module to output steam to the gas power generation module to adjust the power generation efficiency of the gas power generation module, and output hot water to an external heating system; wherein the first heat storage module includes a first heat storage unit, a first heat exchanger, a first steam-water separator, and a second heat exchanger; The control module is further configured to, during the low electricity price period in a day, when the actual average power generation of the gas power generation module is equal to the first load of the power grid and the actual average power generation of the fuel power generation module is greater than the second load of the power grid, control the second switch module to conduct.

2. The multi-purpose electric heat storage control system according to claim 1, characterized in that, Further including: A third switch module and a second heat storage module; A first end of the third switch module is connected to the first transmission line; a second end of the third switch module is electrically connected to a power supply end of the second heat storage module; The control module is further configured to, when the actual real-time output power generation frequency of the gas power generation module is greater than the real-time first load frequency of the power grid at different electricity consumption stages in a day, output a frequency reduction command to the third switch module to make the third switch module conduct; and is also configured to, when the actual real-time output power generation frequency of the gas power generation module is equal to the real-time first load frequency of the power grid at different electricity consumption stages in a day, control the third switch module to disconnect; and is further configured to, when the second heat storage module is greater than a preset temperature, control the second heat storage module to output steam and hot water.

3. The multi-purpose electric heat storage control system according to claim 2, wherein The first heat storage unit includes a first cold air inlet channel, a second cold air inlet channel, a first low-temperature hot air outlet duct, and a first high-temperature hot air outlet duct; the first low-temperature hot air outlet duct is communicated with a first inlet of the first heat exchanger; a second inlet of the first heat exchanger is communicated with a condensate water system; a first outlet of the first heat exchanger is communicated with a low-temperature return air duct; a second outlet of the first heat exchanger is connected to an inlet of the first steam-water separator; The first outlet of the first steam-water separator is communicated with the first inlet of the second heat exchanger; the second inlet of the second heat exchanger is communicated with the first high-temperature hot air outlet air duct; the first outlet of the second heat exchanger outputs steam; the second outlet of the second heat exchanger is communicated with the high-temperature return air duct; the second outlet of the first steam-water separator is communicated with an external heating system; the low-temperature return air duct and the high-temperature return air duct are respectively communicated with the first cold air inlet channel and the second cold air inlet channel.

4. The multi-purpose electric heat storage control system according to claim 3, characterized in that, The first heat storage unit includes a plurality of first heat storage bodies and a plurality of first fans; each first heat storage body includes a first sub-cold air channel, a first sub-low-temperature hot air outlet air duct, and a first sub-high-temperature hot air outlet air duct. Each of the first sub-low-temperature hot air outlet air ducts is communicated to form the first low-temperature hot air outlet air duct; each of the first sub-high-temperature hot air outlet air ducts is communicated to form the first high-temperature hot air outlet air duct. The outlet of the first fan is communicated with the first sub-cold air channel; the first inlet of the first fan serves as the first cold air inlet channel and is communicated with the low-temperature return air duct; the second inlet of the first fan serves as the second cold air inlet channel and is communicated with the high-temperature return air duct.

5. The multi-purpose electric heat storage control system according to claim 4, characterized in that The second heat storage module includes a second heat storage unit, a third heat exchanger, a second steam-water separator, and a fourth heat exchanger. The second heat storage unit includes a third cold air inlet channel, a fourth cold air inlet channel, a second low-temperature hot air outlet air duct, and a second high-temperature hot air outlet air duct; the second low-temperature hot air outlet air duct is communicated with the first inlet of the third heat exchanger; the second inlet of the third heat exchanger is communicated with a condensate system; the first outlet of the third heat exchanger is communicated with the low-temperature return air duct; the second outlet of the third heat exchanger is connected to the inlet of the second steam-water separator. The first outlet of the second steam-water separator is communicated with the first inlet of the fourth heat exchanger; the second inlet of the fourth heat exchanger is communicated with the second high-temperature hot air outlet air duct; the first outlet of the fourth heat exchanger outputs steam; the second outlet of the fourth heat exchanger is communicated with the high-temperature return air duct; the second outlet of the second steam-water separator is communicated with an external heating system; the low-temperature return air duct and the high-temperature return air duct are respectively communicated with the third cold air inlet channel and the fourth cold air inlet channel.

6. The multi-purpose electric heat storage control system according to claim 5, characterized in that, The second heat storage unit includes a plurality of second heat storage bodies and a plurality of second fans; each second heat storage body includes a second sub-cold air channel, a second sub-low-temperature hot air outlet air duct, and a second sub-high-temperature hot air outlet air duct. Each of the second sub-low-temperature hot air outlet air ducts is communicated to form the second low-temperature hot air outlet air duct; each of the second sub-high-temperature hot air outlet air ducts is communicated to form the second high-temperature hot air outlet air duct. The outlet of the second fan is communicated with the second sub-cold air channel; the first inlet of the second fan serves as the third cold air inlet channel and is communicated with the low-temperature return air duct; the second inlet of the second fan serves as the fourth cold air inlet channel and is communicated with the high-temperature return air duct.

7. The multi-purpose electric heat storage control system according to claim 6, characterized in that, The first heat storage body and the second heat storage body are integrally designed, and the first heat storage body and the second heat storage body are stacked up and down through an insulating plate.

8. The multi-purpose electric heat storage control system according to claim 7, characterized in that, The first fan and the second fan are integrally designed; the first sub-cooling air channel and the second sub-cooling air channel are integrally designed; the first sub-low-temperature hot air outlet air duct and the second sub-low-temperature hot air outlet air duct are integrally designed; the first sub-high-temperature hot air outlet air duct and the second sub-high-temperature hot air outlet air duct are integrally designed; the first low-temperature hot air outlet air duct and the second low-temperature hot air outlet air duct are integrally designed; the first high-temperature hot air outlet air duct and the second high-temperature hot air outlet air duct are integrally designed.

9. The multi-purpose electric heat storage control system according to claim 7, characterized in that, Valves are arranged at the second sub-cooling air channels of each of the second heat storage bodies.

10. The multi-purpose electric heat storage control system according to claim 1, characterized in that, The gas power generation module includes a steam turbine, a generator and a transformer; the steam turbine, the generator and the transformer are sequentially coupled and connected.

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