Multipurpose electric heat storage control system

Abstract

The invention discloses a multipurpose electric heat storage control system. The system comprises a first heat storage module, a first switch module, a gas power generation module, a second switch module, a fuel oil power generation module and a control module. The control module controls the first switch module to be switched on when the actual average power generation amount of the gas power generation module is greater than the first load of the power grid at the electricity valley price stage within one day; when the actual average power generation amount of the gas power generation module is equal to the power grid first load, the first switch module is controlled to be disconnected; in the electricity utilization peak price stage within one day, when the actual average power generation amount of the gas power generation module is larger than the first load of the power grid, the first heat storage module is controlled to output steam to the gas power generation module, and hot water is output to an external heating system; and the control module is also used for controlling the second switch module to be switched on when the actual average generating capacity of the gas generating module is equal to the first load of the power grid and the actual average generating capacity of the fuel generating module is greater than the second load of the power grid at the electricity valley price stage within one day.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of heat storage technology, and in particular to a multi-purpose electric heat storage control system. Background Art

[0002] The power balance is determined by the power consumption of the power grid and the power supply of the generator plant. Since power generation and power consumption are completed at the same time, the power generation is not necessarily exactly equal to the power consumption. The active load and reactive load of the power system are constantly changing, so the balance is often broken and efforts must be made to achieve balance. Therefore, the power balance is dynamic, and it is to achieve a temporary balance in the imbalance. It is also an important measure to ease the contradiction between power supply and demand to a certain extent. Power balance is to achieve the balance of power generation and power consumption. It is related to the power quality of the power grid and the safe, stable, reliable and economical operation of the power system. At present, there is an imbalance between the power generation of each power plant and the load of the power grid at different times of the day, 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, which can achieve the balance between power generation of each power plant and power grid load at different time periods in a day through the electric heat storage control system, so as to make the power grid operate stably; in addition, the electric heat storage control system can also meet the heating demand.

[0004] To achieve the above objectives, 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 grid via 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 oil power generation module is coupled to the grid via a second transmission line; the first end of the second switch module is connected to the 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 used to control the first switch module to be turned on so that the first heat storage module can take electricity and store heat from the gas power generation module when the actual average power generation of the gas power generation module is greater than the first load of the power grid at the corresponding stage during the valley price stage of electricity consumption within a day; it is also used to control the first switch module to be turned off when the actual average power generation of the gas power generation module is equal to the first load of the power grid at the valley price stage of electricity consumption within a day; it is also used 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 at the corresponding stage during the peak price stage of electricity consumption within a day;

[0007] The control module is also used 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 valley price stage of electricity consumption 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 also used to output a frequency reduction instruction to the third switch module to turn on the third switch module 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 power consumption stages within a day; it is also used to control the third switch module to be disconnected 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 power consumption stages within a day; and it is also used to control the second heat storage module to output steam and hot water when the temperature of 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 comprises 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 connected to the first inlet of the first heat exchanger; the second inlet of the first heat exchanger is connected to the condensate system; the first outlet of the first heat exchanger is connected to 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-water separator is connected to the first inlet of the second heat exchanger; the second inlet of the second heat exchanger is connected to the first high-temperature hot air outlet duct; the first outlet of the second heat exchanger outputs steam; the second outlet of the second heat exchanger is connected to the high-temperature return air duct; the second outlet of the first steam-water separator is connected to the external heating system; the low-temperature return air duct and the high-temperature return air duct are respectively connected to 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 duct and the first sub-high-temperature hot air outlet duct;

[0015] The first sub-low-temperature hot air outlet air ducts are connected to form the first low-temperature hot air outlet air duct; the first sub-high-temperature hot air outlet air ducts are connected to form the first high-temperature hot air outlet air duct;

[0016] The outlet of the first fan is connected to the first sub-cold air channel; the first inlet of the first fan serves as the first cold air inlet channel, connected to the low-temperature return air duct; the second inlet of the first fan serves as the second cold air inlet channel, connected to 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-water separator and a fourth heat exchanger;

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

[0019] The first outlet of the second steam-water separator is connected to the first inlet of the fourth heat exchanger; the second inlet of the fourth heat exchanger is connected to the second high-temperature hot air outlet duct; the first outlet of the fourth heat exchanger outputs steam; the second outlet of the fourth heat exchanger is connected to the high-temperature return air duct; the second outlet of the second steam-water separator is connected to the external heating system; the low-temperature return air duct and the high-temperature return air duct are respectively connected to 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; the second heat storage body includes a second sub-cold air channel, a second sub-low-temperature hot air outlet duct and a second sub-high-temperature hot air outlet duct;

[0021] The second sub-low-temperature hot air outlet air ducts are connected to form the second low-temperature hot air outlet air duct; the second sub-high-temperature hot air outlet air ducts are connected to form the second high-temperature hot air outlet air duct;

[0022] The outlet of the second fan is connected to the second sub-cold air channel; the first inlet of the second fan serves as the third cold air inlet channel, connected to the low-temperature return air duct; the second inlet of the second fan serves as the fourth cold air inlet channel, connected to the high-temperature return air duct.

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

[0024] Optionally, the first heat storage body and the second heat storage body are designed to be integrated, and the first heat storage body is stacked up and down with the second heat storage body through an insulating plate.

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

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

[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 coupled and connected in sequence.

[0028] In the embodiment of the present invention, the gas power generation module is coupled to the power grid through the 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; in this way, 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 stage during the valley price stage of electricity consumption in a day, the control module controls the first switch module to be turned on, so that the first heat storage module takes electricity and stores heat from the gas power generation module, thereby avoiding the large deviation between the actual average power generation of the gas power generation module and the first load of the power grid, resulting in an imbalance between the gas power generation module and 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 first switch module is controlled to be disconnected; at the same time, 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 stage during the peak price stage of electricity consumption in a day, the control module controls the first heat storage module to output steam to the gas power generation module, thereby adjusting the power generation efficiency of the gas power generation module in the current stage, thereby meeting the higher first load of the power grid in the current stage, and outputting hot water to the external heating system; thus, the balance between the gas power generation module and the first load of the power grid at different stages of the day is met;

[0029] Considering that the power grid is also connected to other fuel-fired power generation modules; the fuel-fired 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; in this way, when the actual average power generation of the gas power generation module is equal to the first load of the power grid during the valley price stage of electricity consumption in a day, and the actual average power generation of the fuel-fired power generation module is greater than the second load of the power grid, the control module controls the second switch module to be turned on, so that the first heat storage module can be used as a load on the power grid side, and thus added to the second load of the power grid, so as to balance the power generation of the fuel-fired power generation module, thereby satisfying the balance between the fuel-fired power generation module and the second load of the power grid at different stages of the day; in this way, the balance between each power generation module and all loads of the power grid is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0031] Figure 2 is a structural schematic 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 a first heat storage module provided in an embodiment of the present invention;

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

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

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

[0036] Figure 7 It is a schematic diagram of a specific structure of the integration of the first heat storage module and the second heat storage module provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0037] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0038] Figure 1 is a schematic diagram of the structure of a multi-purpose electric heat storage control system provided by an embodiment of the present invention; Figure 1 As 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 grid through the first transmission line L1; the first end of the first switch module 20 is connected to the first transmission line L1; the second end of the first switch module 20 is connected to the power supply end of the first thermal storage module 10; the oil power generation module 50 is coupled to the grid through the second transmission line L2; the first end of the second switch module 40 is connected to the grid; the second end of the second switch module 40 is connected to the power supply end of the first thermal storage module 10;

[0040] The control module 60 is used to control the first switch module 20 to conduct so that the first heat storage module 10 takes electricity and stores heat 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 in the corresponding stage during the valley price stage of electricity consumption within a day; it is also used 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 in the valley price stage of electricity consumption within a day; it is also used 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 when the actual average power generation of the gas power generation module 30 is less than the first load of the power grid in the corresponding stage during the peak price stage of electricity consumption within a day, and output hot water to the external heating system;

[0041] The control module 60 is also used to control the second switch module 40 to be turned on when the actual average power generation of the gas power generation module 30 is equal to the first load of the power grid and the actual average power generation of the fuel power generation module 50 is greater than the second load of the power grid during the valley price stage of electricity consumption within a day.

[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 wind after heat storage; the first switch module 20 and the second switch module 40 are any modules that can be turned on or 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 gas drive, 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 load of the power grid is the power generation required by the power grid for the gas power generation module 30 according to the current power load demand; generally, the power load demand of the power grid is different at different stages of a day, so the power generation required for the gas power generation module is also different, that is, the first load of the power grid is different at different stages of a day; the different stages of a day include the valley price stage and the peak price stage; usually, the first load of the power grid at the valley price stage is smaller than the actual average power generation of the gas power generation module, and the first load at the peak price stage is larger than the actual average power generation of the gas power generation module;

[0044] In fact, since the gas power generation module has no parameter changes, the average power generation under the actual 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 under the actual power generation at each moment in any stage; in the valley price stage, the imbalance between the first load of the power grid and the actual average power generation of the gas power generation module will lead to instability of the power grid; in the peak price stage, the imbalance between the first load and the actual average power generation of the gas power generation module will lead to instability of the power grid;

[0045] The second load of the power grid is the power generation required by the power grid for the fuel power generation module 50 according to the current load demand; similarly, the second load of the power grid is different at different stages of the day; generally, the second load of the power grid at the valley price stage is smaller than the actual average power generation of the fuel power generation module 50, and the second load at the peak price stage 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 under the actual power generation at each moment in different stages; in fact, since the fuel power generation module has no parameter changes, the average power generation under the actual power generation at each moment in different stages is almost the same; then in the valley price stage of electricity, the imbalance between the second load of the power grid and the actual average power generation of the fuel power generation module will lead to grid instability; in the peak price stage of electricity, the imbalance between the first load and the actual average power generation of the fuel power generation module will lead to grid instability.

[0047] 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 of the gas power generation module 30 in the valley price stage of electricity consumption in a day is greater than the first load of the power grid in the corresponding stage, the control module 60 controls the first switch module 20 to be turned on, so that the first heat storage module 10 takes electricity from the gas power generation module 30 to store heat, thereby avoiding the actual average power generation of the gas power generation module 30 The deviation from the first load of the power grid is too large, resulting in an imbalance between the gas power generation module 30 and the power grid; until the actual average power generation of the gas power generation module 30 is equal to the first load of the power grid, the first switch module 20 is controlled to be disconnected; at the same time, the control module 60 controls the first heat storage module 10 to output steam to the gas power generation module 30 during the peak electricity price stage of the day, so as to adjust the power generation efficiency of the gas power generation module 30 at the current stage, thereby meeting the higher first load of the power grid at the current stage, and outputting 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 the day is met;

[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 valley price stage of electricity consumption 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 50 is greater than the second load of the power grid, the control module 60 controls the second switch module 40 to be turned on, so that the first heat storage module 10 can also be used as a load on the power grid side, so that it is added with the second load of the power grid, so that it can be balanced with the power generation of the fuel power generation module, thereby satisfying the balance between the fuel power generation module 50 and the second load of the power grid at different stages of the day; in this way, the balance between each power generation module and all loads of the power grid is achieved through the first heat storage module 10.

[0049] It should also be noted that the heat storage capacity of the first heat storage module 10 has a maximum limit. If the temperature of the first heat storage module 10 reaches the upper limit, 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 damage to the first heat storage module 10.

[0050] Optionally, based on the above embodiment, the above embodiment is further optimized. Figure 2 is a schematic diagram of the structure of another multi-purpose electric heat storage control system provided by an embodiment of the present invention; 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 the power supply end of the second heat storage module 80;

[0051] The control module 60 is also used to output a frequency reduction instruction 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 first load frequency of the power grid at different power consumption stages within a day; it is also used to control the third switch module 70 to be disconnected 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 power consumption stages within a day; it is also used to control the second heat storage module 80 to output steam and hot water when the temperature of the second heat storage module 80 is greater than a preset temperature.

[0052] Among them, during different stages of electricity consumption within a day, the output power generation of the gas power generation module 30 is adjusted by the first switch module 20, and the output power generation also has certain fluctuations; that is, the actual real-time output power generation frequency; considering that the first load of the power grid actually has a certain allowable fluctuation frequency at different stages of electricity consumption, such as 50Hz; when the actual real-time output power generation frequency does not match the first load frequency of the power grid, it will also affect the stability of the power 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 first load frequency of the power grid during different stages of electricity consumption within a day, a frequency reduction instruction is output to the third switch module 70, so that the third switch module 70 is turned on, and the power generation output by the gas power generation module 30 can be finely adjusted, thereby maintaining the real-time first load frequency of the power grid, so that the power generation of the gas power generation module 30 can be more accurately adjusted in different stages of electricity consumption, thereby maintaining the stability of the power grid frequency.

[0053] 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 in a day, the third switch module 70 is controlled to be disconnected; considering the maximum heat storage capacity that the second heat storage module 80 can bear, and when the second heat storage module 80 is greater than the preset temperature, the second heat storage module 80 is controlled to output steam and hot water, so that the hot water can meet the heating system. In this way, the power generation efficiency of the gas power generation module 30 can be jointly adjusted together with the first heat storage module 10 during the peak electricity price stage within a day.

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

[0055] Optionally, based on the above embodiment, each module is further refined. Figure 3 is a schematic structural diagram of a first heat storage module provided in an embodiment of the present invention; Figure 3 As 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 is connected to the first inlet of the first heat exchanger 12; the second inlet of the first heat exchanger 12 is connected to the condensate system; the first outlet of the first heat exchanger 12 is connected to 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 is connected to the first inlet of the second heat exchanger 14; the second inlet of the second heat exchanger 14 is connected to 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 is connected to the high-temperature return air duct F; the second outlet of the first steam-water separator 13 is connected to the external heating system; the low-temperature return air duct E and the high-temperature return air duct are respectively connected to the first cold air inlet channel A1 and the second cold air inlet channel B1.

[0058] Among them, the process of the first heat storage module 10 outputting steam is as follows: the condensate system flows into the second inlet of the first heat exchanger 12, and when the first heat storage unit 11 starts working, the cold water in the first cold air inlet channel A1 and the second cold air inlet channel B1 can be heat exchanged to generate hot air. In order to achieve 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, so that the low-temperature hot air enters the first heat exchanger 12 through the first low-temperature hot air outlet duct C1, so that it can exchange heat with the condensate to generate a gas-water mixture; the gas-water mixture can generate hot water and saturated steam after separation by the first steam-water separator 13; 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; in this way, the superheated steam can drive the gas power generation module 30 to work; the hot water generated after 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 a first low-temperature hot air outlet duct C1 and a first high-temperature hot air outlet duct D1, so that the pressure and temperature of the superheated steam generated by the heat storage unit can be independently controlled.

[0060] Optionally, the first heat storage unit 11 is further refined, and the first heat storage unit 11 can output low-temperature hot air and high-temperature hot air; Figure 4 is a schematic diagram of the specific structure of the first heat storage module provided in an embodiment of the present invention; Figure 4 As shown, the first heat storage unit 11 includes a plurality of first heat storage bodies 111 and a plurality of first fans 112; the 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 is connected to form a first low-temperature hot air outlet duct C1; each first sub-high-temperature hot air outlet duct 1113 is connected to form a first high-temperature hot air outlet duct D1. The outlet 1121 of the first fan 112 is connected to the first sub-cold air channel 1111; the first inlet 1122 of each first fan 112 is used as a first cold air inlet channel A1, which is connected to the low-temperature return air duct E; the second inlet 1123 of each first fan 112 is used as a second cold air inlet channel B1, which is connected to the high-temperature return air duct F.

[0061] Specifically, this embodiment illustrates that low-temperature hot air and high-temperature hot air can be output from the first heat storage unit 11; since the power supply ends of the first heat storage bodies all draw electricity from the gas power generation module, each first heat storage body 111 can reach a certain heat storage temperature. When the heat storage temperature reaches a certain heat storage temperature, since the heat storage temperature is relatively high at this time, the speed of the first fan 112 corresponding to any heat storage body 111 can be controlled to be relatively small, so that the hot air output by the 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; and the speeds of the first fans corresponding to other heat storage bodies are is larger, 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 condensed water to produce a gas-water mixture; the gas-water mixture can produce hot water and saturated steam after separation by the first steam-water separator 13; 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 produces superheated steam.

[0062] Optionally, based on the same design concept as for the thermal storage module, Figure 5 is a specific structural diagram of a multi-purpose electric heat storage control system provided by an embodiment of the present invention; Figure 5 As 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 duct C2 and a second high-temperature hot air outlet duct D2; the second low-temperature hot air outlet duct C2 is connected to the first inlet of the third heat exchanger 82; the second inlet of the third heat exchanger 82 is connected to the condensate system; the first outlet of the third heat exchanger 82 is connected to 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-water separator 83;

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

[0065] Among them, the process of the second heat storage module 80 outputting steam when the temperature is higher than the preset temperature is: the condensate system flows into the second inlet of the third heat exchanger 82, and when the second heat storage unit 81 starts working, the cold water in the third cold air inlet channel A2 and the fourth cold air inlet channel B2 can be heat exchanged to generate hot air. In order to achieve 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, so that the low-temperature hot air enters the third heat exchanger 82 through the second low-temperature hot air outlet duct C2, so that it can exchange heat with the condensate to produce a gas-water mixture; the gas-water mixture can produce hot water and saturated steam after separation by the second steam-water separator 83; the saturated steam passes through the fourth heat exchanger 84, and since the high-temperature hot air enters the second high-temperature hot air outlet 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 produces superheated steam; in this way, 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 second heat storage unit 81 can output low-temperature hot air and high-temperature hot air; Figure 6 is a schematic diagram of the specific structure of the second heat storage module provided in an embodiment of the present invention; Figure 6As shown, the second heat storage unit 81 includes a plurality of second heat storage bodies 811 and a plurality of second fans 812; the second heat storage body 811 includes a second sub-cold air channel 8111, a second sub-low-temperature hot air outlet duct 8112 and a second sub-high-temperature hot air outlet duct 8113; each second sub-low-temperature hot air outlet duct 8112 is connected to form a second low-temperature hot air outlet duct C2; each second sub-high-temperature hot air outlet duct 8113 is connected to form a second high-temperature hot air outlet duct D2. The outlet 8121 of the second fan 812 is connected to the first sub-cold air channel 1111; the first inlet 8122 of each second fan 812 is used as the third cold air inlet channel A2, which is connected to the low-temperature return air duct E; the second inlet 8123 of each second fan 812 is used as the fourth cold air inlet channel B2, which is connected to 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 end of the second heat storage body 811 draws electricity 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 (such as: the heat storage temperature is 600°C), since the heat storage temperature is relatively high at this time, the speed of the second fan corresponding to any heat storage body 811 can be controlled to be smaller, so that the hot air output by the heat storage body is discharged from the second sub-high-temperature hot air outlet duct 8113 to the second high-temperature hot air outlet duct D2; and each second fan corresponding to other heat storage bodies The speed of the machine is relatively large, so that the hot air output by other heat storage bodies is output from the second sub-low-temperature hot air outlet duct 8112 to the second low-temperature hot air outlet duct C2; in this way, the low-temperature hot air enters the third heat exchanger 82 through the second low-temperature hot air outlet duct C2, and can exchange heat with condensed water to produce a gas-water mixture; the gas-water mixture can produce hot water and saturated steam after separation by the second steam-water separator 83; the saturated steam passes through the fourth heat exchanger 84, and since the high-temperature hot air enters the second high-temperature hot air outlet 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 produces superheated steam.

[0068] Optionally, in some other embodiments, Figure 7 is a schematic diagram of the structure of the integration of the first heat storage module and the second heat storage module provided in an embodiment of the present invention; Figure 7 As shown, the first heat storage body 111 and the second heat storage body 811 are designed to be integrated, and the first heat storage body 111 is stacked up and down with the second heat storage body 811 through an insulating plate.

[0069] The first fan 112 and the second fan 812 are designed in an integrated manner; the first sub-cold air channel 1111 and the second sub-cold air channel 8111 are designed in an integrated manner; the first sub-high-temperature hot air outlet duct 1113 and the second sub-high-temperature hot air outlet duct 8113 are designed in an integrated manner; the first low-temperature hot air outlet duct C1 and the second low-temperature hot air outlet duct C2 are designed in an integrated manner; the first high-temperature hot air outlet duct D1 and the second high-temperature hot air outlet duct D2 are designed in an integrated manner. That is, the first heat storage module and the second heat storage module are designed in an integrated manner, so that on the basis of completing the above heat storage and outputting steam and hot water, 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; while the first heat storage body 111 is stacked up and down with the second heat storage body 811 through an insulating plate, the air duct of the second heat storage body 811 can form a chimney effect, the hot air rises, and the cold air falls, so that the air volume in the side air duct of the second heat storage body 811 is reduced by the influence of wind resistance.

[0071] Optionally, in other embodiments, a valve is provided at the second sub-cold air channel of each second thermal storage body 811. In this way, when each thermal storage body 811 outputs superheated steam, the valve at the second sub-cold air channel of each second thermal 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 coupled in sequence. 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 electrical energy, and finally the transformer converts the electrical energy into electrical energy of a certain voltage level and outputs it to the grid side.

[0073] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection 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, and may include more other equivalent embodiments without departing from the concept of the present invention, 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: include: 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 grid via 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 oil power generation module is coupled to the grid via a second transmission line; the first end of the second switch module is connected to the grid; the second end of the second switch module is connected to the power supply end of the first heat storage module; The control module is used to control the first switch module to be turned on so that the first heat storage module can take electricity and store heat from the gas power generation module when the actual average power generation of the gas power generation module is greater than the first load of the power grid at the corresponding stage during the valley price stage of electricity consumption within a day; it is also used to control the first switch module to be turned off when the actual average power generation of the gas power generation module is equal to the first load of the power grid at the valley price stage of electricity consumption within a day; it is also used 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 at the corresponding stage during the peak price stage of electricity consumption within a day; The control module is also used 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 valley price stage of electricity consumption within a day.

2. The multi-purpose electric thermal storage control system according to claim 1, characterized in that: Also includes: A third switch module and a second heat storage module; 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; The control module is also used to output a frequency reduction instruction to the third switch module to turn on the third switch module 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 power consumption stages within a day; it is also used to control the third switch module to be disconnected 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 power consumption stages within a day; and it is also used to control the second heat storage module to output steam and hot water when the temperature of the second heat storage module is greater than a preset temperature.

3. The multi-purpose electric thermal storage control system according to claim 2, characterized in that: 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 first heat storage unit comprises 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 connected to the first inlet of the first heat exchanger; the second inlet of the first heat exchanger is connected to the condensate system; the first outlet of the first heat exchanger is connected to 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; The first outlet of the first steam-water separator is connected to the first inlet of the second heat exchanger; the second inlet of the second heat exchanger is connected to the first high-temperature hot air outlet duct; the first outlet of the second heat exchanger outputs steam; the second outlet of the second heat exchanger is connected to the high-temperature return air duct; the second outlet of the first steam-water separator is connected to the external heating system; the low-temperature return air duct and the high-temperature return air duct are respectively connected to the first cold air inlet channel and the second cold air inlet channel.

4. The multi-purpose electric thermal 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; the 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; The first sub-low-temperature hot air outlet air ducts are connected to form the first low-temperature hot air outlet air duct; the first sub-high-temperature hot air outlet air ducts are connected to form the first high-temperature hot air outlet air duct; The outlet of the first fan is connected to the first sub-cold air channel; the first inlet of the first fan serves as the first cold air inlet channel, connected to the low-temperature return air duct; the second inlet of the first fan serves as the second cold air inlet channel, connected to the high-temperature return air duct.

5. The multi-purpose electric thermal 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 comprises a third cold air inlet channel, a fourth cold air inlet channel, a second low-temperature hot air outlet duct and a second high-temperature hot air outlet duct; the second low-temperature hot air outlet duct is connected to the first inlet of the third heat exchanger; the second inlet of the third heat exchanger is connected to the condensate system; the first outlet of the third heat exchanger is connected to 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 connected to the first inlet of the fourth heat exchanger; the second inlet of the fourth heat exchanger is connected to the second high-temperature hot air outlet duct; the first outlet of the fourth heat exchanger outputs steam; the second outlet of the fourth heat exchanger is connected to the high-temperature return air duct; the second outlet of the second steam-water separator is connected to the external heating system; the low-temperature return air duct and the high-temperature return air duct are respectively connected to the third cold air inlet channel and the fourth cold air inlet channel.

6. The multi-purpose electric thermal 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; the second heat storage body includes a second sub-cold air channel, a second sub-low-temperature hot air outlet duct and a second sub-high-temperature hot air outlet duct; The second sub-low-temperature hot air outlet air ducts are connected to form the second low-temperature hot air outlet air duct; the second sub-high-temperature hot air outlet air ducts are connected to form the second high-temperature hot air outlet air duct; The outlet of the second fan is connected to the second sub-cold air channel; the first inlet of the second fan serves as the third cold air inlet channel, connected to the low-temperature return air channel; the second inlet of the second fan serves as the fourth cold air inlet channel, connected to the high-temperature return air channel; The outlet of the second fan is connected to the second sub-cold air channel; the first inlet of each second fan is connected to the low-temperature return air duct; the second inlet of each second fan is connected to the high-temperature return air duct.

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

8. The multi-purpose electric thermal storage control system according to claim 7, characterized in that: The first fan and the second fan are designed in an integrated manner; the first sub-cold air duct and the second sub-cold air duct are designed in an integrated manner; the first sub-low-temperature hot air outlet duct and the second sub-low-temperature hot air outlet duct are designed in an integrated manner; the first sub-high-temperature hot air outlet duct and the second sub-high-temperature hot air outlet duct are designed in an integrated manner; the first low-temperature hot air outlet duct and the second low-temperature hot air outlet duct are designed in an integrated manner; the first high-temperature hot air outlet duct and the second high-temperature hot air outlet duct are designed in an integrated manner.

9. The multi-purpose electric thermal storage control system according to claim 7, characterized in that: A valve is provided at the second cold air sub-channel of each of the second heat storage bodies.

10. The multi-purpose electric thermal 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 coupled and connected in sequence.

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