CN116972431A - Electric boiler heat storage system and power grid peak shaving method - Google Patents

Abstract

The invention discloses an electric boiler heat storage system and a power grid peak shaving method, wherein the electric boiler heat storage system comprises a thermal power plant, a heat supply network head station, a heat storage component and a water storage tank, the heat supply network head station is provided with a first port and a second port, the first port of the heat supply network head station is suitable for being communicated with a heat supply pipe, so that hot water flowing out of the heat supply network head station flows into the heat supply pipe to provide heat energy for a user, or the second port of the heat supply network head station is suitable for being communicated with a return pipe, so that return water in the return pipe flows into the heat supply network head station to enable the heat supply network head station to heat the return water, the heat storage component is provided with a first channel and a second channel which are mutually independent and can perform heat exchange, one end of the first channel is communicated with the first port of the heat supply network head station, and one end of the second channel is suitable for being communicated with an electrode boiler, so that steam generated by the electrode boiler flows into the second channel to heat water in the first channel. The electric boiler heat storage system has the advantages of flexible and changeable regulation scheme, no influence on heat exchange capacity of a heat exchange first station, low investment cost and the like.

Description

Electric boiler heat storage system and power grid peak shaving method

Technical Field

The invention belongs to the field of cogeneration, and particularly relates to an electric boiler heat storage system and a power grid peak regulation method.

Background

In recent years, in most areas of China, the installed capacity of the electric power market thermal power plant is excessive, especially in winter heating period, in order to ensure the smoothness of urban central heating preferentially, the heat and power cogeneration thermal power generating unit needs to be charged with load and heat load according to the minimum operation working condition of the power grid, in order to ensure the minimum heat load of the unit, the heat and power cogeneration unit cannot reduce the electric load, the load adjustment space of the power grid is limited, and new energy sources such as photovoltaic energy, wind energy and the like are caused to have wind discarding and light discarding phenomena, and especially in areas with longer heating period are more obvious.

Therefore, the peak shaving capability of the thermal power plant is poor and the operation cost is high in the related art.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems in the related art to some extent.

Therefore, the embodiment of the invention provides the electric boiler heat storage system which is low in operation cost and high in peak regulation capacity of the thermal power plant.

The embodiment of the invention provides a network peak shaving method which is simple in steps and low in cost.

An electric boiler heat storage system according to an embodiment of the present invention includes: a thermal power plant for generating electrical and thermal energy, the thermal power plant comprising a heat network head station having a first port and a second port, the first port of the heat network head station being adapted to communicate with a heating pipe such that hot water flowing out of the heat network head station flows into the heating pipe to provide thermal energy to a user, or the second port of the heat network head station being adapted to communicate with a return pipe such that return water within the return pipe flows into the heat network head station to cause the heat network head station to heat the return water; the heat storage assembly is provided with a first channel and a second channel which are mutually independent and can perform heat exchange, one end of the first channel is disconnected with a first port of the heat supply network head station when the electric boiler heat storage system is in a non-heating season, only an electric load is generated by a thermal power plant, and the electric boiler heat storage system does not work; in a heating season, one end of the first channel is communicated with a first port of the heat supply network head station so that part of hot water flowing out of the heat supply network head station flows into the first channel, one end of the second channel is suitable for being communicated with the electrode boiler so that steam generated by the electrode boiler flows into the second channel to heat hot water in the first channel, the electric boiler heat storage system is in a peak shaving period and has a first state and a second state, in the first state, the other end of the first channel is communicated with the heat supply pipe so that the heated hot water flows into the heat supply pipe to provide heat energy for a user, and in the second state, the other end of the first channel is respectively communicated with the heat supply pipe and the water storage tank so that part of hot water flowing out of the first channel flows into the heat supply pipe and the other part of hot water flowing out of the first channel flows into the water storage tank.

According to the electric boiler heat storage system provided by the embodiment of the invention, the heat supply network head station, the heat storage component and the water storage tank are arranged, so that the thermal power plant can operate under low electric load, the heat supply capacity of the electric boiler heat storage system is ensured, the peak regulation capacity of the thermal power plant is enhanced, and the operating cost of the thermal power plant is reduced.

In some embodiments, the plurality of heat storage assemblies is provided, at least one of the plurality of heat storage assemblies is in communication with the first port of the heat supply network head station, such that hot water flowing out of the heat supply network head station flows into at least one of the plurality of heat storage assemblies, which is in communication with the heating pipe during the peak heating period, and which is in communication with the heating pipe and the water storage tank during the initial end heating period, respectively.

In some embodiments, the first heat network head station includes a first heat network head station and a second heat network head station, each of the first heat network head station and the second heat network head station having a first port and a second port, a portion of the plurality of heat storage assemblies in communication with the first port of the first heat network head station and the heating tube, respectively, such that a portion of the plurality of heat storage assemblies heats hot water flowing out through the first heat network head station, and another portion of the plurality of heat storage assemblies in communication with the first port of the second heat network head station and the heating tube, respectively, such that another portion of the plurality of heat storage assemblies heats hot water flowing out through the second heat network head station.

In some embodiments, the electric boiler heat storage system further comprises a detection assembly, both ends of which are respectively communicated with the heat storage assembly and the heat supply pipe, so that the detection assembly detects the flow rate of the hot water flowing into the heat supply pipe through the heat storage assembly.

In some embodiments, the first state includes a first sub-state and a second sub-state, the electric boiler heat storage system is in the first sub-state during peak shaving of the heat supply peak period, the top of the water storage tank is communicated with the first port of the heat supply network head station so that surplus hot water generated by the heat supply network head station flows into the water storage tank, the bottom of the water storage tank is communicated with the second port of the heat supply network head station so that water in the water storage tank flows into the heat supply network head station, and the top of the water storage tank is communicated with the heat supply pipe during the non-peak shaving period of the heat supply peak period, and the electric boiler heat storage system is in the second sub-state so that water in the water storage tank flows into the heat supply pipe, and the bottom of the water storage tank is communicated with the water return pipe so that water in the water return pipe flows into the water storage tank.

In some embodiments, the second state includes a third sub-state and a fourth sub-state, the electric boiler heat storage system is in the third sub-state at a peak shaving section of an initial and final stage of heat supply, the top of the water storage tank is communicated with the other end of the first channel of the heat storage assembly so that surplus hot water in the first channel of the heat storage assembly flows into the water storage tank, the bottom of the water storage tank is communicated with the second port of the heat supply network head station so that water in the water storage tank flows into the heat supply network head station, the electric boiler heat storage system is in the fourth sub-state at a non-peak shaving section of the initial and final stage of heat supply, the top of the water storage tank is communicated with the heat supply pipe so that water in the water storage tank flows into the heat supply pipe, and the bottom of the water storage tank is communicated with the water return pipe so that water in the water return pipe flows into the water storage tank.

In some embodiments, the electric boiler heat storage system further comprises a first pump and a second pump, in the first sub-state and the third sub-state, the first pump is respectively communicated with the bottom of the water storage tank and the second port of the heat supply network head station, so that water in the bottom of the water storage tank flows into the heat supply network head station through the first pump, and in the second sub-state and the fourth sub-state, two ends of the second pump are respectively communicated with the top of the water storage tank and the heat supply pipe, so that water in the water storage tank flows into the heat supply pipe through the second pump.

In some embodiments, the temperature of the water storage tank is no greater than 95 ℃.

In some embodiments, the electric boiler heat storage system further comprises a communicating member, wherein two ends of the communicating member are respectively communicated with one end of the first channel and the first port of the heat supply network head station, the communicating member is communicated during the heat supply peak period and the heat supply initial and final period so that the heat storage component is communicated with the heat supply network head station through the communicating member, and the communicating member is disconnected during non-heating season or non-peak regulation period so that the heat storage component is disconnected from the heat supply network head station through the communicating member.

According to the power grid peak shaving method of the embodiment of the invention, the electric boiler heat storage system utilizing any one of the above embodiments comprises: s1: when the peak regulation is needed, the thermal power plant reduces the charged load of the thermal power plant, and the medium-low pressure communication of the thermal power plant is gradually closed so as to control the water supply temperature of the head station to be stable through a valve; s2: when the low-pressure communication valve in the thermal power plant is closed to the minimum and the water supply temperature cannot be stabilized, starting a heat storage component of the electric boiler heat storage system to increase the water supply temperature; s3: when the thermal power plant needs further deep peak shaving, the load of the thermal power plant is maintained unchanged, the load of an electrode boiler of the thermal power plant is continuously increased, the power consumption of the electrode boiler is the power consumption of the thermal power plant, so that the power on-line electric quantity is relatively further reduced, and meanwhile, the heat exchange efficiency of the heat storage component is adjusted according to the change condition of the water supply temperature of the first heat supply network station so as to keep the water supply temperature of the first heat supply network station stable; s4: and under the condition that the water supply temperature of the heat supply network head station is stable, when the water supply temperature of the heat supply head station is higher than a preset value, part of hot water in the heat storage component flows into the water storage tank to be stored so as to store heat in the heat storage system of the electric boiler.

Drawings

Fig. 1 is a schematic structural view of an electric boiler heat storage system according to an embodiment of the present invention.

Reference numerals:

an electric boiler heat storage system 100;

an inlet main 001; an outlet main 002; a first electric thermal storage bypass gate 101; a second electrical thermal storage bypass gate 102; a first thermal storage assembly access door 103; a first thermal storage assembly outlet door 104; a second thermal storage assembly access door 105; a second thermal storage assembly outlet door 106; a first auxiliary heat storage door 113; a second auxiliary heat storage door 114;

valves 107-112, 201-208, 305, 309;

a first main heat release door 301; a first main thermal storage door 302; a second main heat storage door 303; a second main heat release gate 304; a first pump outlet door 306; a first pump 307; a first pump inlet door 308; a second pump outlet door 310; a second pump 311; a second pump inlet door 312;

a first electrical heat storage device 401; a second electrical heat storage device 402; a third electric heat storage device 403; a fourth electrical heat storage device 404; a first detection component 501; a second detection component 502;

a water storage tank 601; a first heat supply network head station 6; a second heat supply network head station 7; a heat supply pipe 8; and a return pipe 9.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.

An electric boiler heat storage system according to an embodiment of the present invention is described below with reference to the accompanying drawings.

As shown in fig. 1, an electric boiler heat storage system 100 according to an embodiment of the present invention includes a thermal power plant (not shown), a heat storage assembly 4, and a water storage tank 601.

The thermal power plant is used for generating electric energy and heat energy, and comprises a heat supply network head station, wherein the first port of the heat supply network head station is suitable for being communicated with a heat supply pipe 8, so that hot water flowing out of the heat supply network head station flows into the heat supply pipe 8 to provide heat energy for a user, or the second port of the heat supply network head station is suitable for being communicated with a water return pipe 9, so that return water in the water return pipe 9 flows into the heat supply network head station to enable the heat supply network head station to heat the return water.

Specifically, as shown in fig. 1, the thermal power plant provides electric energy and heat energy to a user, and the first port is a water outlet of the heat supply network head station and is communicated with an inlet of the heat supply pipe 8, so that hot water (heat supply network water) generated by the heat supply network head station flows into the heat supply pipe 8, thereby being provided to the user through the heat supply pipe 8 to obtain heat energy by the user, and the second port is a water outlet of the heat supply network head station and is communicated with an outlet of the water return pipe 9, so that water (heat supply network water return) in the water return pipe 9 flows into the heat supply network head station to heat the heat supply network water return.

The heat storage assembly 4 has a first channel (not shown) and a second channel (not shown) which are independent of each other and can exchange heat, and one end of the first channel is disconnected from a first port of the heat supply network head station during a non-heating season or a non-peak shaving period of the electric boiler heat storage system 100, so that the heat supply network head station supplies heat energy to a user.

Specifically, during non-heating seasons or non-peak shaving periods of the electric boiler heat storage system 100, neither the heat storage assembly 4 nor the water storage tank 601 are operating, and all water at the head station of the heat supply network is flowing to the user to provide heat energy to the user.

During peak shaving, the electric boiler heat storage system 100 is in communication with the first port of the first heat supply network station at one end of the first passage such that hot water exiting the first heat supply network station flows into the first passage and the electrode boiler at one end of the second passage is adapted to communicate with the electrode boiler such that steam generated by the electrode boiler flows into the second passage to heat hot water within the first passage. Specifically, as shown in fig. 1, the heat storage component 4 is a plate heat exchanger, the inlet of the first channel is communicated with the first port of the heat supply network head station, so that part of hot water flowing out of the heat supply network head station flows into the first channel, the inlet of the second channel is communicated with an electrode boiler (electrode boiler), and steam or hot water generated by the electrode boiler flows into the second channel, so that the first channel and the second channel exchange heat, and the temperature of hot water in the first channel is further increased, and the temperature of steam or hot water in the second channel is reduced.

The electric boiler heat storage system 100 includes a first state in which the other end of the first passage communicates with the heat supply pipe 8 so that heated hot water flows into the heat supply pipe 8 to supply heat energy to a user, and a second state in which the other end of the first passage communicates with the heat supply pipe 8 and the water storage tank 601, respectively, so that a part of hot water flowing out of the first passage flows into the heat supply pipe 8 and another part of hot water flowing out of the first passage flows into the water storage tank 601. Specifically, as shown in fig. 1, in the first state, the outlet of the first passage communicates with the heat supply pipe 8 so that the heated hot water of the heat storage assembly 4 flows into the heat supply pipe 8 to raise the heat supply temperature of the heat supply pipe 8, and in the second state, the outlet of the first passage communicates with the heat supply pipe 8 and the inlet of the water storage tank 601, respectively, so that the water heated in the heat exchange pipe is divided into two parts, one part flows into the heat supply pipe 8 to raise the heat supply temperature in the heat supply pipe 8 and the other part flows into the water storage tank 601 to store the surplus hot water.

The thermal power plant can generate electric energy and heat energy, wherein the heat energy is transferred to the electric boiler heat storage system to provide heat for users, the electric energy is transferred to the thermoelectric unit to provide electric energy for users, when the thermal power plant receives an instruction and needs peak regulation, the electric load of the thermal power plant is firstly reduced, and the middle-low pressure communication valve in the electric boiler heat storage system 100 is gradually closed to control the water supply temperature of the head station of the thermal power network to be stable, when the electric load is reduced and the middle-low pressure communication valve is closed to the minimum and the water supply temperature is unstable (or in the heat supply peak period), the electric boiler heat storage system 100 is in a first state, the heat storage component 4 is started, then the electric load of the thermal power plant is continuously reduced, the output capacity of the heat storage component 4 is gradually increased according to the change of the water supply temperature of the head station of the thermal power network, the stability of the water supply temperature of the head station is maintained, and when the output capacity of the heat storage component 4 is still provided with margin (for example: the head station end of initial heat supply) is also continuously increased, the heat storage component 4 is in a second state when the power supply temperature is stable, and the generated heat can flow into the water storage tank 601 and stored in the water storage tank 601.

According to the electric boiler heat storage system 100 provided by the embodiment of the invention, the heat supply network head station, the heat storage component 4 and the water storage tank 601 are arranged, hot water flowing out of the heat supply network head station can be subjected to heat energy provided for a user through the heat storage component 4, when a peak regulation is needed for a thermal power plant, the thermal power plant can be operated under low electric load, and the heat supply capacity of the electric boiler heat storage system 100 is ensured through the heat storage component 4, so that the peak regulation capacity of the thermal power plant is enhanced, the operation cost of the thermal power plant is reduced, the peak regulation can be participated to the maximum extent, and the peak regulation service benefit is obtained. In addition, the redundant heat energy generated by redundant heat storage components 4 can be stored in the water storage tank 601 through the water storage tank 601, so that the waste of energy sources is avoided, and the running cost of the electric boiler heat storage system 100 is reduced.

In some embodiments, the plurality of thermal storage assemblies 4 is provided, at least one of the plurality of thermal storage assemblies 4 is in communication with the first port of the heat supply network head station, such that hot water flowing out of the heat supply network head station flows into at least one of the plurality of thermal storage assemblies 4, at least one of the thermal storage assemblies 4 is in communication with the heating pipe 8 during a peak heating period, and at least one of the thermal storage assemblies 4 is in communication with the heating pipe 8 and the water storage tank 601 during an initial end heating period, respectively. Specifically, as shown in fig. 1, the heat storage assemblies 4 are disposed at intervals along the left-right direction, and inlets of the first channels of the plurality of heat storage assemblies 4 are all communicated with the first port of the heat supply network head station, so that the heat storage assemblies 4 can be started according to actual situations, for example: the hot water flowing out of the heat supply network head station can flow into one or more of the plurality of heat storage components 4, so that one or more of the plurality of heat storage components 4 work, or the hot water flowing out of the heat supply network head station respectively flows into each heat storage component 4 and enables each heat storage component 4 to work, in other words, the plurality of heat storage components 4 are connected with the heat supply network head station in a parallel mode, therefore, the operation modes of the heat storage components 4 are flexible and changeable, the heat storage components 4 can be started according to actual working conditions, the working efficiency of the heat storage components 4 is improved, the waste of energy sources is avoided, and the heat supply cost of the heat storage system 100 of the electric boiler is reduced.

In some embodiments, the first heat network head station includes a first heat network head station 6 and a second heat network head station 7, each of the first heat network head station 6 and the second heat network head station 7 having a first port and a second port, a portion of the plurality of thermal storage assemblies 4 being in communication with the first port of the first heat network head station 6 and the heating tube 8, respectively, such that a portion of the plurality of thermal storage assemblies 4 heats the hot water flowing out through the first heat network head station 6, and another portion of the plurality of thermal storage assemblies 4 being in communication with the first port of the second heat network head station 7 and the heating tube 8, respectively, such that another portion of the plurality of thermal storage assemblies 4 heats the hot water flowing out through the second heat network head station 7. Specifically, as shown in fig. 1, the heat storage assembly 4 may heat water flowing out of the first heat supply network head station 6 or water flowing out of the second heat supply network head station 7 according to actual situations, for example: the heat accumulating assemblies 4 are respectively a first heat accumulating assembly 401, a second heat accumulating assembly 402, a third heat accumulating assembly 403 and a fourth heat accumulating assembly 404, 4 (4 are shown in fig. 1), the first heat accumulating network head station 6 is communicated with the first heat accumulating assembly 401, hot water flowing out of the first heat accumulating network head station 6 flows into the first heat accumulating assembly 401, the second heat accumulating assembly 402, the third heat accumulating assembly 403 and the fourth heat accumulating assembly 404 are communicated with the second heat accumulating network head station 7, hot water flowing out of the second heat accumulating network head station 7 flows into the second heat accumulating assembly 402, the third heat accumulating assembly 403 and the fourth heat accumulating assembly 404, so that the first heat accumulating assembly 401 heats water flowing out of the first heat accumulating network head station 6, the second heat accumulating assembly 402, the third heat accumulating assembly 403 and the fourth heat accumulating assembly 404 heat water flowing out of the second heat accumulating network head station 7, or the first heat accumulating network head station 6 is communicated with the first heat accumulating network head station 401 and the second heat accumulating assembly 402, the hot water flowing out of the first heat supply network head station 6 flows into the first heat storage component 401 and the second heat storage component 402, the third heat storage component 403 and the fourth heat storage component 404 are communicated with the second heat supply network head station 7, so that the hot water flowing out of the second heat supply network head station 7 flows into the third heat storage component 403 and the fourth heat storage component 404, the first heat storage component 401 and the second heat storage component 402 heat the water flowing out of the first heat supply network head station 6, the third heat storage component 403 and the fourth heat storage component 404 heat the water flowing out of the second heat supply network head station 7, or the first heat storage component 401, the second heat storage component 402, the third heat storage component 403 and the fourth heat storage component 404 are communicated with the first heat supply network head station 6, the second heat supply network head station 7 is not communicated with the heat storage component 4 any more, and the water flowing out of the first heat supply network head station 6 flows into the first heat storage component 401, the second heat storage component 402, the third heat storage assembly 403 and the fourth heat storage assembly 404, so that the first heat storage assembly 401, the second heat storage assembly 402, the third heat storage assembly 403 and the fourth heat storage assembly 404 heat water flowing out of the first heat supply network head station 6, therefore, the plurality of heat storage assemblies 4 can supply heat to the first heat supply network head station 6 or the second heat supply network head station 7 independently at the same time, the plurality of heat storage assemblies 4 can also be flexibly grouped to supply heat to the first heat supply network head station 6 and the second heat supply network head station 7 independently, and the distribution of heat of the plurality of heat storage assemblies 4 is optimized.

In some embodiments, the electric boiler heat storage system 100 further includes a detection assembly, both ends of which are respectively in communication with the heat storage assembly 4 and the heat supply pipe 8, so that the detection assembly detects the flow rate of the hot water flowing into the heat supply pipe 8 through the heat storage assembly 4. Specifically, as shown in fig. 1, the detecting component is a flow sensor, the inlet of the detecting component is communicated with the outlet of the first channel of the heat storage component 4, and the outlet of the detecting component is communicated with the heat supply pipe 8, so that hot water in the first channel of the heat storage component 4 flows into the heat supply pipe 8 through the detecting component to raise the temperature of the hot water in the heat supply pipe 8 to raise the heat supply to a user, and the detecting component can be used for detecting the flow rate of the hot water flowing into the heat supply pipe 8 by the heat storage component 4, so that the temperature of the hot water in the heat supply pipe 8 is detected through the flow rate.

In some embodiments, the detection assembly includes a first detection assembly 501 and a second detection assembly 502, where two ends of the first detection assembly 501 are respectively in communication with the thermal storage assembly 4 and the heating pipe 8 of the first heat supply network head station 6, and two ends of the second detection assembly 502 are respectively in communication with the thermal storage assembly 4 and the heating pipe 8 of the second heat supply network head station 7. Thereby, the flow rate of the hot water flowing into the heat supply pipe 8 of the first heat supply network head station 6 from the heat storage module 4 is detected by the first detection module 501, and the flow rate of the hot water flowing into the heat supply pipe 8 of the second heat supply network head station 7 from the heat storage module 4 is detected by the second detection module 502.

In some embodiments the temperature of the water storage tank 601 is no greater than 95 ℃. Specifically, when the electric boiler heat storage system 100 is in operation, the water storage tank 601 is always in a full water state, the water storage tank 601 has a third port and a fourth port, the third port is disposed adjacent to the top of the water storage tank 601, the fourth port is disposed adjacent to the bottom of the water storage tank 601, and since the density of hot water is lower than that of cold water, the temperature of the water at the bottom of the water storage tank 601 is lower than that of the water at the top of the water storage tank 601, in other words, cold water in the water storage tank 601 is located at the bottom of the water storage tank 601, hot water in the water storage tank 601 is located at the top of the water storage tank 601, the temperature in the water storage tank 601 is not higher than 95 ℃, the risk of gasification in the water storage tank 601 can be prevented, and the safety performance of the water storage tank 601 is improved.

In some embodiments, the first state includes a first sub-state and a second sub-state, in the peak shaving stage of the heat supply peak period, in the first sub-state, in the electric boiler heat storage system 100, the top of the water storage tank 601 is communicated with the first port of the heat supply network head station, so that the surplus hot water generated by the heat storage assembly 4 flows into the water storage tank 601, the bottom of the water storage tank 601 is communicated with the second port of the heat supply network head station, so that the water in the water storage tank 601 flows into the heat supply network head station, in particular, as shown in fig. 1, in the peak shaving stage of the heat supply peak period, when the heat storage assembly 4 operates and the heat supply network water supply temperature is equal to or higher than 95 ℃, in the first sub-state, the third port of the water storage tank 601 is communicated with the first port of the heat supply network head station, and the fourth port of the water storage tank 601 is communicated with the second port of the heat supply network head station, so that the surplus hot water generated after heat exchange of the heat storage assembly 4 can be stored in the water storage tank 601, the surplus heat generated by the heat storage assembly 4 is stored in the water storage tank, the surplus heat generated by the heat storage assembly, and the cold water flowing into the water pipe 9 of the bottom of the water storage tank 601 is supplemented, and the water in the water storage tank is kept balanced by the water storage tank.

In some embodiments, the electric boiler heat storage system 100 is in the second sub-state at a non-peak-regulation period of the heat supply peak period, the top of the water storage tank 601 is in communication with the heat supply pipe 8 so that water in the water storage tank 601 flows into the heat supply pipe 8, and the bottom of the water storage tank 601 is in communication with the return pipe 9 so that water in the return pipe 9 flows into the water storage tank 601. Specifically, as shown in fig. 1, in the second sub-state, the third port of the water storage tank 601 is communicated with the heat supply pipe 8, so that hot water in the water storage tank 601 flows into the heat supply pipe 8 to supplement the heat supply pipe 8 with heat supply network backwater, the fourth port of the water storage tank 601 is communicated with the backwater pipe 9, so that water in the backwater pipe 9 flows into the water storage tank 601, and water in the water storage tank 601 is supplemented to ensure water balance in the water storage tank 601.

In some embodiments, the second state includes a third sub-state in which the electric boiler thermal storage system 100 is in a peak shaving section of an initial end of heat supply, and a fourth sub-state in which the top of the water storage tank 601 is in communication with the other end of the first channel of the thermal storage assembly 4 so that the surplus hot water in the first channel of the thermal storage assembly 4 flows into the water storage tank 601, and the bottom of the water storage tank 601 is in communication with the second port of the heat supply network head station so that the water in the water storage tank 601 flows into the heat supply network head station. Specifically, as shown in fig. 1, in the third sub-state, in the peak regulation period of the initial and final stage of heat supply, when the heat storage assembly 4 is operated and the water supply temperature of the heat supply network is less than 95 ℃, the third port of the water storage tank 601 is communicated with the outlet of the first channel of the heat storage assembly 4, and the fourth port of the water storage tank 601 is communicated with the second port of the first station of the heat supply network, so that the surplus hot water generated after the heat exchange of the heat storage assembly 4 can be stored in the water storage tank 601 to store the surplus heat generated by the heat storage assembly 4, and the cold water at the bottom of the water storage tank 601 flows into the water return pipe 9 to supplement the water return of the heat supply network, so that the water in the water storage tank 601 is kept balanced.

In some embodiments, in the non-peak shaving section at the beginning and end of heat supply, the electric boiler heat storage system 100 is in the fourth sub-state, the top of the water storage tank 601 is in communication with the heat supply pipe 8 so that water in the water storage tank 601 flows into the heat supply pipe 8, and the bottom of the water storage tank 601 is in communication with the return pipe 9 so that water in the return pipe 9 flows into the water storage tank 601. Specifically, as shown in fig. 1, in the fourth sub-state, the third port of the water storage tank 601 is communicated with the heat supply pipe 8, so that hot water in the water storage tank 601 flows into the heat supply pipe 8 to supplement the heat supply pipe 8 with heat supply network backwater, the fourth port of the water storage tank 601 is communicated with the backwater pipe 9, so that water in the backwater pipe 9 flows into the water storage tank 601, and water in the water storage tank 601 is supplemented to ensure water balance in the water storage tank 601.

In some embodiments, the electric boiler heat storage system 100 further comprises a first pump 307 and a second pump 311, in a first sub-state and a third sub-state, the first pump 307 is respectively in communication with the bottom of the water storage tank 601 and the second port of the heat supply pipe 8 so that water in the bottom of the water storage tank 601 flows into the heat supply pipe 8 through the first pump 307, and in a second sub-state and a fourth sub-state, both ends of the second pump 311 are respectively in communication with the top of the water storage tank 601 and the heat supply pipe 8 so that water in the water storage tank 601 flows into the heat supply pipe 8 through the second pump 311.

Specifically, as shown in fig. 1, the first pump 307 and the second pump 311 are water pumps, in the first sub-state and the third sub-state, the inlet of the first pump is communicated with the fourth port of the water storage tank 601, the outlet of the first pump is communicated with the second port of the heat supply pipe 8, so that water in the bottom of the water storage tank 601 flows into the heat supply network head station through the fourth port and the first pump 307, meanwhile, the surplus hot water generated by the heat exchange of the heat storage assembly 4 or the heat supply network head station is discharged into the water storage tank 601 through the third port, in the second sub-state and the fourth sub-state, the inlet of the second pump 311 is communicated with the third port of the water storage tank 601, the outlet of the second pump 311 is communicated with the heat supply pipe 8, and therefore, the water in the water storage tank 601 flows into the heat supply pipe 8 through the second pump 311 to supplement heat energy for the heat supply pipe 8, and meanwhile, part of the water in the return pipe 9 flows into the water storage tank 601 automatically, and meanwhile, the water in the heat storage system 100 is supplied to flow through the first pump 307 and the second pump 311, and the heat storage system is not wasted by the heat exchange system.

In some embodiments, the electric boiler thermal storage system 100 further includes a communication member, both ends of the communication member are respectively communicated with the first port of the first channel and the first port of the heat supply network head station, the communication member is communicated so that the thermal storage assembly 4 is communicated with the heat supply network head station through the communication member during a heating season or a peak regulation period, and the communication member is disconnected so that the thermal storage assembly 4 is disconnected from the heat supply network head station through the communication member. Specifically, as shown in fig. 1, the communicating member may be a valve 302, the inlet of the communicating member is communicated with the first port of the first heat supply network station, and the outlet of the communicating member is communicated with the inlet of the first channel of the heat storage component 4, so that the on-off between the first heat supply network station and the heat storage component 4 is controlled by the communicating member, and when the heat supply peak period and the initial end period of the heat supply network station are insufficient in heat supply or the peak of the power grid, the communicating member and the heat storage component 4 are opened, so that part of hot water generated by the first heat supply network station flows into the heat storage component 4 through the communicating member to heat the hot water, and when the heat supply network station is sufficient in non-heating season or non-peak-regulating period, the communicating member and the heat storage component 4 are closed, so that the first heat supply network station and the heat storage component 4 are disconnected, and the hot water generated by the first heat supply network station is prevented from flowing into the heat storage component 4.

As shown in fig. 1, a power grid peak shaving method according to an embodiment of the present invention, using any one of the electric boiler heat storage systems 100 of the above embodiments, includes:

s1: when the peak regulation is needed, the thermal power plant reduces the charged load, and the medium-low pressure communication of the thermal power plant is gradually closed to control the water supply temperature of the head station to be stable.

S2: when the thermal power plant needs further deep peak regulation, the load of the thermal power plant is maintained unchanged, the load of an electrode boiler of the thermal power plant is continuously increased, the power consumption of the electrode boiler is the power consumption of the thermal power plant, so that the power on the internet is relatively further reduced, and meanwhile, the heat exchange efficiency of the heat storage component 4 is adjusted according to the change condition of the water supply temperature of the first heat supply network so as to keep the water supply temperature of the first heat supply network stable

S3: the charged load of the thermal power plant is continuously reduced, and the heat exchange efficiency of the heat storage component 4 is gradually increased according to the change condition of the water supply temperature of the heat supply network head station so as to keep the water supply temperature of the heat supply network head station stable.

S4: as the peak shaving depth continues to increase, in the case where the water supply temperature of the heat supply network head station is stable, when the water supply temperature of the heat supply head station is higher than a preset value, part of the hot water in the heat storage assembly 4 flows into the water storage tank to store the heat in the electric boiler heat storage system 100.

Therefore, the power grid peak shaving method provided by the embodiment of the invention has the advantages of simple steps, strong peak shaving capability, low running cost and the like.

An electric boiler heat storage system 100 according to an embodiment of the present invention is specifically described below with reference to fig. 1.

As shown in fig. 1, the electric boiler heat storage system 100 comprises a first heat supply network head station 6 for heat supply of a thermal power plant, a second heat supply network head station 7, a first heat storage component 401, a second heat storage component 402, a third heat storage component 403, a fourth heat storage component 404, a water storage tank 601, a first pump 307, a second pump 311, a series of valve combinations, pipelines and the like;

the inlet main pipe 001 and the outlet main pipe 002 of the electric boiler heat storage system 100 and 4 heat storage components 401-404 are operated in parallel to form a heat storage component 4. The secondary side of each platen heat exchanger is respectively connected with an inlet main pipe 001 and an outlet main pipe 002 by an inlet branch pipe and an outlet branch pipe, a valve 205 is arranged on the inlet branch pipe of a first heat storage component 401, a valve 201 is arranged on the outlet branch pipe of the first heat storage component 401, a valve 206 is arranged on the inlet branch pipe of a second heat storage component 402, a valve 202 is arranged on the outlet branch pipe of the second heat storage component 402, a valve 207 is arranged on the inlet branch pipe of a third heat storage component 403, a valve 203 is arranged on the outlet branch pipe of the third heat storage component 403, a valve 208 is arranged on the inlet branch pipe of a fourth heat storage component 404, a valve 204 is arranged on the outlet branch pipe of the fourth heat storage component 404, and the valves 201-208 are used for overhauling the first heat storage component 401, the second heat storage component 402, the third heat storage component 403 and the fourth heat storage component 404, and each heat storage component 4 is provided with a heat source by an electrode boiler.

The first heat supply network head station 6 is connected with one end of the inlet main pipe 001 through the first heat storage component inlet door 103, and is connected with the first heat storage component outlet door 104 after passing through the heat storage component to supply heat to users. One end of the first electric heat storage bypass door 101 is connected with the front of the first heat storage component inlet door 103, and the other end is connected with the first heat storage component outlet door 104, so that hot water at the outlet of the first heat supply network head station 6 can directly supply heat to a user through the first electric heat storage bypass door 101. The second heat supply network head station 7 is connected with the other end of the inlet main pipe 001 through the second heat storage component inlet door 105, and is connected with the second heat storage component outlet door 106 after passing through the heat storage component 4 to supply heat to users. One end of the second electric heat storage bypass door 102 is connected with the front of the second heat storage component inlet door 105, and the other end is connected with the second heat storage component outlet door 106, so that hot water at the outlet of the second heat supply network head station 7 can directly supply heat to a user through the second electric heat storage bypass door 102. The first and second heat storage assembly inlet doors 103 and 105 are followed by first and second sensing assemblies 501 and 502, respectively, for metering water flow.

1 water storage tank 601 is arranged, and the water temperature in the water storage tank 601 is not higher than 95 ℃. The water storage tank 601 is connected in parallel with the first heat supply network head station 6 and the second heat supply network head station 7 through the water supply pipeline 313 and the water return pipeline 314 respectively. The water supply pipe 313 is installed with a second pump 311311, a second pump 311 inlet door 312, a second pump 311 outlet door 310, and a water supply bypass door 309. The return water pipe 9 is provided with a first pump 307, a first pump 307 inlet door 308, a first pump 307 outlet door 306 and a return water bypass door 305. One end of the water supply pipeline 313 is connected with the upper part of the water storage tank 601, the other end of the water supply pipeline is connected with the water supply of the first heat supply network head station 6 through the first main heat storage door 302, the water supply of the second heat supply network head station 7 through the second main heat storage door 303, one end of the outlet main pipe 002 is connected through the first auxiliary heat storage door 113, and the other end of the outlet main pipe 002 is connected through the second auxiliary heat storage door 114. One end of the water return pipe 9 is connected with the lower part of the water storage tank 601, and the other end is connected with two parts, namely, the water return pipe 9 is connected with the first heat supply network head station 6 through the first main heat release door 301, and the water return pipe 9 is connected with the second heat supply network head station 7 through the second main heat release door 304.

The first heat storage component 401, the second heat storage component 402, the third heat storage component 403 and the fourth heat storage component 404 can realize five operation modes that the first heat storage component 401, the second heat storage component 402, the third heat storage component 403 and the fourth heat storage component 404 are all connected in series to the first heat supply network head station 6, the first heat storage component 401, the second heat storage component 402, the third heat storage component 403 and the fourth heat storage component 404 are all connected in series to the second heat supply network head station 7, one of the first heat supply network head station 6 is connected in series to the second heat supply network head station 7, two of the first heat supply network head stations 6 are connected in series to the second heat supply network head station 7, and three of the first heat supply network head station 6 is connected in series to the second heat supply network head station 7. Valves 105, 106, 113 and 114 are closed, valves 103, 104, 107, 108, 109, 110, 111 and 112 are opened, and the first heat storage assembly 401, the second heat storage assembly 402, the third heat storage assembly 403 and the fourth heat storage assembly 404 are all connected in series to the first heat supply network head station 6; valves 103, 104, 105, 106, 108, 109, 111, 112 are opened, valves 107, 110 are closed, a first heat storage assembly 401 is connected in series with the first heat supply network head station 6, and a second heat storage assembly 402, a third heat storage assembly 403 and a fourth heat storage assembly 404 are connected in series with the second heat supply network head station 7; valves 103, 104, 105, 106, 107, 110, 109, 112 are opened, valves 108, 111 are closed, first heat storage assembly 401 and second heat storage assembly 402 are strung into first heat supply network head station 6, and third heat storage assembly 403 and fourth heat storage assembly 404 are strung into second heat supply network head station 7; valves 103, 104, 105, 106, 107, 110, 108, 111 are opened, valves 109, 112 are closed, first thermal storage assembly 401, second thermal storage assembly 402 and third thermal storage assembly 403 are connected in series to first thermal network head station 6, and fourth thermal storage assembly 404 is connected in series to second thermal network head station 7; valves 105, 106, 107, 110, 108, 111, 109, 112 are open and valves 103, 104, 113 are closed, all thermal storage assemblies 4 being strung into the second thermal network head station 7.

During peak regulation period at the initial and final stages of heat supply, when the heat storage component 4 is operated and the water supply temperature of the heat supply network is less than 95 ℃, the valves 113, 114, 308 and 309 can be opened, the first pump 307 is started, the valves 306 and 301 are opened, redundant hot water at the outlet of the heat storage component 4 is stored in the Chu Shuiguan and 601, and cold water at the lower part of the water storage tank 601 is discharged to the water return of the heat supply network; during periods of non-peak shaving at the beginning of the heating, valves 301, 305, 312 may be opened, the second pump 311311 may be started, and valves 310, 113, 114 may be opened to fill the heating pipe 8 with stored hot water and the water storage tank 601 with return water from the heating network.

During peak regulation of the hot-water supply extremely cold period, when the heat storage component 4 operates and the water supply temperature of the heat supply network is more than or equal to 95 ℃, the valves 113 and 114 can be closed, the valves 302, 303, 308 and 309 are opened, the first pump 307 is started, the valves 306 and 301 are opened, redundant hot water of the water supply of the heat supply network is stored in the Chu Shuiguan and 601, and cold water at the lower part of the water tank 601 is discharged to the return water of the heat supply network; during the non-peak regulation period of the hot-cold supply period, the valves 301, 305 and 312 can be opened, the second pump 311311 can be started, the valves 310, 302 and 303 can be opened, the stored hot water can be injected into the 8 channels of the hot-supply pipe, and the water storage tank 601 can be filled with the backwater of the heat supply network.

Thus, the electric boiler heat storage system 100 of the embodiment of the present invention has the following advantages:

A series of connecting doors (valves) are arranged on the heat storage components 4, the inlet main pipe 001 and the outlet main pipe 002, and each heat storage component 4 can be controlled to be connected with the first heat supply network head station 6 or the second heat supply network head station 8 in series through different switch combinations, so that the optimal distribution of heat in different areas is realized.

An open water storage tank is arranged in the electric boiler heat storage system 100, and the water temperature in the water storage tank is not higher than 95 ℃. The water storage tank is connected in parallel with the first heat supply network head station 6 and the second heat supply network head station 7 respectively, when the heat of the electric boiler heat storage system 100 is rich, hot water in water supply can be stored in the water tank, and when the heat is insufficient, the heat in the heat storage water tank can be discharged. The water storage tank can also be connected with the heat storage component 4 in series, hot water at the outlet of the water storage tank 601 can be stored in the water storage tank, and heat is released during use.

When the heat supply network has excessive heat during peak regulation, if the temperature of the outlet of the heat storage component is lower than 95 ℃ at the beginning and end of heat supply, part of hot water at the outlet of the heat storage component can be stored in Chu Shuiguan; if the temperature of the outlet of the heat storage component is higher than 95 ℃ in the hot-cold supply period, a part of hot water at the outlet of the first station of the heat supply network can be stored in the water storage tank 601.

In a word, the method for participating in the peak shaving service of the power grid by adopting the heat storage component has the advantages of low transformation and investment cost, flexible and changeable operation modes, and can participate in peak shaving to the maximum extent, thereby obtaining the benefits of the peak shaving service. Meanwhile, the heat of the heat storage component is optimally distributed, and the energy consumption is saved.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

Claims (10)

1. An electric boiler heat storage system, comprising:

A thermal power plant for generating electrical and thermal energy, the thermal power plant comprising a heat network head station having a first port and a second port, the first port of the heat network head station being adapted to communicate with a heating pipe such that hot water flowing out of the heat network head station flows into the heating pipe to provide thermal energy to a user, or the second port of the heat network head station being adapted to communicate with a return pipe such that return water within the return pipe flows into the heat network head station to cause the heat network head station to heat the return water;

the heat storage assembly is provided with a first channel and a second channel which are mutually independent and can perform heat exchange, and one end of the first channel is disconnected with a first port of the heat supply network head station when the electric boiler heat storage system is in a non-heating season or a non-peak regulation period so that the heat supply network head station provides heat energy for users;

in the peak regulation period, one end of the first channel is communicated with the first port of the heat supply network head station so that part of hot water flowing out of the heat supply network head station flows into the first channel, one end of the second channel is suitable for being communicated with the electrode boiler so that steam generated by the electrode boiler flows into the second channel to heat hot water in the first channel,

The electric boiler heat storage system is in a peak shaving period and has a first state and a second state, in the first state, the other end of the first channel is communicated with the heat supply pipe so that heated hot water flows into the heat supply pipe to provide heat energy for a user, and in the second state, the other end of the first channel is respectively communicated with the heat supply pipe and the water storage tank so that one part of hot water flowing out of the first channel flows into the heat supply pipe and the other part of hot water flowing out of the first channel flows into the water storage tank.

2. An electric boiler heat storage system as set forth in claim 1 wherein said plurality of heat storage assemblies is provided, at least one of said plurality of heat storage assemblies being in communication with said first port of said heat supply network head station such that hot water exiting said heat supply network head station flows into at least one of said plurality of heat storage assemblies, at said peak heat supply period, at least one of said heat storage assemblies being in communication with said heat supply pipe and at said initial end heat supply period, at least one of said heat storage assemblies being in communication with said heat supply pipe and said water storage tank, respectively.

3. An electric boiler heat storage system according to claim 2 wherein said heat network head station comprises a first heat network head station and a second heat network head station, each of said first heat network head station and said second heat network head station having a first port and a second port, a portion of a plurality of said heat storage assemblies being in communication with said first port of said first heat network head station and said heat supply pipe, respectively, such that a portion of said plurality of said heat storage assemblies heats hot water flowing through said first heat network head station,

Another part of the plurality of heat storage components is respectively communicated with the first port of the second heat supply network head station and the heat supply pipe, so that the other part of the plurality of heat storage components heats hot water flowing out through the second heat supply network head station.

4. An electric boiler heat storage system according to claim 1 further comprising a detection assembly, both ends of which are respectively in communication with the heat storage assembly and the heat supply pipe, so that the detection assembly detects the flow rate of the hot water flowing into the heat supply pipe through the heat storage assembly.

5. An electric boiler heat storage system according to claim 1 wherein said first state comprises a first sub-state and a second sub-state, said electric boiler heat storage system being in the first sub-state during peak shaving during peak heating periods, the top of said water storage tank being in communication with a first port of said heat supply network head station so that excess hot water produced by said heat supply network head station flows into said water storage tank, the bottom of said water storage tank being in communication with a second port of said heat supply network head station so that water in said water storage tank flows into said heat supply network head station,

in the non-peak-adjusting section of the heat supply peak period, the electric boiler heat storage system is in a second sub-state, the top of the water storage tank is communicated with the heat supply pipe so that water in the water storage tank flows into the heat supply pipe, and the bottom of the water storage tank is communicated with the water return pipe so that water in the water return pipe flows into the water storage tank.

6. An electric boiler heat storage system according to claim 5 wherein said second state comprises a third sub-state and a fourth sub-state, said electric boiler heat storage system being in the third sub-state at a peak shaving section at the beginning of the heat supply, the top of said water storage tank being in communication with the other end of the first channel of said heat storage assembly so that excess hot water in the first channel of said heat storage assembly flows into said water storage tank, the bottom of said water storage tank being in communication with the second port of said heat supply network head station so that water in said water storage tank flows into said heat supply network head station,

and in the non-peak adjusting section at the initial and final stages of heat supply, the electric boiler heat storage system is in a fourth sub-state, the top of the water storage tank is communicated with the heat supply pipe so that water in the water storage tank flows into the heat supply pipe, and the bottom of the water storage tank is communicated with the water return pipe so that water in the water return pipe flows into the water storage tank.

7. An electric boiler heat storage system according to claim 6 further comprising a first pump and a second pump, said first pump communicating with said water storage tank bottom and said second port of said heat supply network head station, respectively, in said first sub-state and said third sub-state, such that water in said water storage tank bottom flows into said heat supply network head station through said first pump,

In the second sub-state and the fourth sub-state, two ends of the second pump are respectively communicated with the top of the water storage tank and the heat supply pipe, so that water in the water storage tank flows into the heat supply pipe through the second pump.

8. An electric boiler heat storage system according to any of claims 1-7 wherein the temperature of the water storage tank is no greater than 95 ℃.

9. An electric boiler heat storage system according to claim 1 further comprising a communication member having both ends respectively communicating with one end of said first passage and a first port of said heat supply network head station,

and in the heating peak period and the heating initial period, the communicating piece is communicated, so that the heat storage component is communicated with the heat supply network head station through the communicating piece, and in the non-heating season or the non-peak regulating period, the communicating piece is disconnected, so that the heat storage component is disconnected with the heat supply network head station through the communicating piece.

10. A method for peak shaving of an electric network, using the electric boiler heat storage system according to any one of claims 1 to 9, comprising:

s1: when the peak regulation is needed, the thermal power plant reduces the charged load of the thermal power plant, and the medium-low pressure communication of the thermal power plant is gradually closed so as to control the water supply temperature of the head station to be stable through a valve;

S2: when the low-pressure communication valve in the thermal power plant is closed to the minimum and the water supply temperature cannot be stabilized, starting a heat storage component of the electric boiler heat storage system to increase the water supply temperature;

s3: when the thermal power plant needs further deep peak shaving, the load of the thermal power plant is maintained unchanged, the load of an electrode boiler of the thermal power plant is continuously increased, the power consumption of the electrode boiler is the power consumption of the thermal power plant, so that the power on-line electric quantity is relatively further reduced, and meanwhile, the heat exchange efficiency of the heat storage component is adjusted according to the change condition of the water supply temperature of the first heat supply network station so as to keep the water supply temperature of the first heat supply network station stable;

s4: and under the condition that the water supply temperature of the heat supply network head station is stable, when the water supply temperature of the heat supply head station is higher than a preset value, part of hot water in the heat storage component flows into the water storage tank to be stored so as to store heat in the heat storage system of the electric boiler.