CN112879114A - Thermoelectric cooperative system and method based on multi-energy complementation and step heat storage - Google Patents
Thermoelectric cooperative system and method based on multi-energy complementation and step heat storage Download PDFInfo
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- CN112879114A CN112879114A CN202110052294.2A CN202110052294A CN112879114A CN 112879114 A CN112879114 A CN 112879114A CN 202110052294 A CN202110052294 A CN 202110052294A CN 112879114 A CN112879114 A CN 112879114A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
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Abstract
A thermoelectricity cooperative system and a method based on multi-energy complementation and step heat storage are disclosed, wherein the thermoelectricity cooperative system comprises a power grid, a clean energy power generation device, a water supplementing pump, a high-temperature electric heat storage steam generation system, a steam main pipeline, a steam branch pipeline, a solar heat collector, a heat storage water tank, a hot water pipeline, a hot water user and a steam user; electric wire netting and high temperature electricity heat accumulation steam generation system are connected respectively to clean energy power generation facility's output, the input electric connection net of high temperature electricity heat accumulation steam generation system, high temperature electricity heat accumulation steam generation system is connected to the moisturizing pump, high temperature electricity heat accumulation steam generation system passes through steam main line lug connection steam user, steam main line is connected to the steam branch pipe entry end, the input of holding water tank is connected to the exit end, holding water tank's input is also connected to solar collector's exit end, holding water tank's output passes through hot water pipe connection hot water user, the complementary heat supply of high temperature electricity heat accumulation steam generation system and solar collector has been realized.
Description
Technical Field
The application relates to the technical field, in particular to a thermoelectric cooperative system and method based on multi-energy complementation and step heat storage.
Background
Because the current environmental pollution problem is severe, the requirements of people on clean energy and environmental protection are more and more strict, the traditional coal-fired heating is gradually eliminated, and the development of clean heating technologies such as renewable energy and the like is widely concerned.
Since renewable energy sources are subject to temporal discontinuities, spatial differences, and operational instabilities, renewable energy sources are often used in combination with thermal energy storage systems, and a single renewable energy source may be limited by energy shortages, there is a need to develop electrical thermal storage systems for multi-source power generation. Chinese patent CN210004497U proposes that solar energy, geothermal energy, water source heat pump and other energy sources are used to form a heating system, but because the system uses water as heat storage working medium, not only the heat storage density is low, but also it is not beneficial to store heat for a long time. Chinese patent CN210035434U proposes a steam system using complementary energy, and the heat storage material uses molten salt and heat conducting oil, but the system is relatively single in product supply, and if only hot water is needed, it is very uneconomical.
In the prior art, heating systems are individually planned, designed and operated independently, coordination among the systems is poor, and the problem of insufficient energy gradient utilization exists, so that one system is required to be capable of utilizing multi-source power generation and thermoelectric cooperative operation, different heat storage media can be adopted, energy gradient heat storage is realized, and the maximum economical efficiency of energy utilization is achieved.
Disclosure of Invention
The application provides a thermoelectric cooperative system and a thermoelectric cooperative method based on multi-energy complementation and step heat storage, and aims to solve the problems that in the prior art, heating systems are independently planned, independently designed and independently operated, the coordination among the heating systems is poor, and the energy step utilization is insufficient.
The technical scheme adopted by the application is as follows:
a thermoelectric cooperative system based on multi-energy complementation and step heat storage,
the thermoelectric cooperative system comprises a power grid, a clean energy power generation device, a water replenishing pump, a high-temperature electric heat storage steam generation system, a steam main pipeline, a steam branch pipeline, a solar heat collector, a heat storage water tank, a hot water pipeline, a hot water user and a steam user;
the output end of the clean energy power generation device is respectively connected with the power grid and the high-temperature electric heat storage steam generation system and is used for generating electric energy to supply power to the power grid and the high-temperature electric heat storage steam generation system;
the input end of the high-temperature electric heat storage steam generation system is electrically connected with the power grid and is used for carrying out an electric heat storage process, converting electric energy into heat energy and storing the heat energy, and realizing the complementary heat storage of the power grid and clean energy power generation;
the water replenishing pump is connected with the high-temperature electric heat storage steam generation system and is used for supplying water to the high-temperature electric heat storage steam generation system;
the high-temperature electric heat storage steam generation system is directly connected with a steam user through the steam main pipeline and used for supplying steam to the steam user;
the inlet end of the steam branch pipeline is connected with the main steam pipeline, the outlet end of the steam branch pipeline is connected with the input end of the heat storage water tank, and the steam branch pipeline is used for conveying steam generated in the high-temperature electric heat storage steam generation system to the heat storage water tank through the main steam pipeline and the steam branch pipeline;
the outlet end of the solar heat collector is also connected with the input end of the heat storage water tank, and the solar heat collector is used for collecting tap water through solar radiation to generate hot water which enters the heat storage water tank for storage;
the output end of the heat storage water tank is connected with a hot water user through the hot water pipeline and used for supplying hot water to the hot water user through the hot water pipeline, and complementary heat supply of the high-temperature electric heat storage steam generation system and the solar heat collector is achieved.
Preferably, the clean energy power generation device comprises a wind power generation device and a photovoltaic power generation device;
the output end of the wind power generation device is respectively connected with the power grid and the high-temperature electric heat storage steam generation system;
and the output end of the photovoltaic power generation device is also respectively connected with the power grid and the high-temperature electric heat storage steam generation system.
Preferably, the water supply device further comprises a softener, wherein the softener is connected with an input end of the water replenishing pump and is used for softening tap water.
A thermoelectric cooperation method based on multi-energy complementation and step heat storage is applied to the thermoelectric cooperation system based on multi-energy complementation and step heat storage, and comprises the following steps:
when the electricity price of the power grid is higher than a set maximum threshold value and the heat stored by the high-temperature electricity heat storage steam generation system is higher than a maximum charging threshold value, the electric energy generated by the wind power generation device and the photovoltaic power generation device is merged into the power grid for consumption and use, the load of the power grid is shared, and the complementary power supply of wind energy, solar energy power generation and the power grid is realized;
when the electricity price of the power grid is lower than a set minimum threshold value and the high-temperature electric heat storage steam generation system is lower than a minimum charging threshold value, the electric energy generated by the clean energy power generation device is preferably and completely transmitted to the high-temperature electric heat storage steam generation system, the electric heat storage process is carried out to convert the electric energy into heat energy for storage, and the heat energy is stored until the heat stored by the high-temperature electric heat storage steam generation system is higher than a maximum charging threshold value, and the residual electric energy is merged into the power grid;
if the electricity price of the power grid is between a set minimum threshold value and a set maximum threshold value and the stored heat of the high-temperature electric heat storage steam generation system is higher than a maximum charging threshold value, the electric energy generated by the wind power generation device and the photovoltaic power generation device is merged into the power grid for consumption;
if the electricity price of the power grid is between a set minimum threshold value and a set maximum threshold value and the stored heat of the high-temperature electric heat storage steam generation system is lower than a minimum charging threshold value, the electric energy generated by the wind power generation device and the photovoltaic power generation device is transmitted to the high-temperature electric heat storage steam generation system to be converted into heat energy in the electric heat storage process;
if the electricity price of the power grid is between a set minimum threshold value and a set maximum threshold value and the heat stored in the high-temperature electric heat storage steam generation system is continuously lower than a minimum charging threshold value, the electric energy of the power grid is transmitted to the high-temperature electric heat storage steam generation system, and the electric heat storage process is carried out to convert the electric energy into heat energy to be stored;
if the electricity price of the power grid is higher than a set maximum threshold value and the high-temperature electric heat storage steam generation system is lower than a minimum charging threshold value, electric energy generated by the wind power generation device and the photovoltaic power generation device is preferentially transmitted to the high-temperature electric heat storage steam generation system, and the electric heat storage process is carried out to convert the electric energy into heat energy to be stored;
when a hot water user has a hot water demand, the tap water is conveyed into the heat storage water tank through the hot water produced by solar radiation heat collection in the solar heat collector and then supplied to the hot water user through the hot water pipeline;
or tap water generates steam through the high-temperature electric heat storage steam generation system, enters the steam branch pipeline through the steam main pipeline, then enters the heat storage water tank, is mixed with low-temperature water to obtain hot water with a certain temperature, and is supplied to a hot water user through the hot water pipeline;
when a steam user has a steam demand, the water replenishing pump is started to convey water softened by the softener to the high-temperature electric heat storage steam generation system for heating, and steam generated in the high-temperature electric heat storage steam generation system is directly supplied to the steam user through the steam main pipeline.
Preferably, if the electricity price of the power grid is higher than a set maximum threshold value and the high-temperature electric heat storage steam generation system is lower than a minimum charging threshold value, the electric energy generated by the wind power generation device and the photovoltaic power generation device is preferentially transmitted to the high-temperature electric heat storage steam generation system, and the electric heat storage process is performed to convert the electric energy into heat energy for storage, and then the method further comprises the following steps:
when the stored heat of the high-temperature electric heat storage steam generation system is higher than a specific charging threshold value, the residual electric energy is merged into the power grid;
if the stored heat of the high-temperature electric heat storage steam generation system is continuously lower than the specific charging threshold value, the electric energy of the power grid is transmitted to the high-temperature electric heat storage steam generation system, and the complementary heat storage of wind energy, solar energy power generation and the power grid is realized;
the particular charging threshold is between a maximum charging threshold and a minimum charging threshold.
Preferably, the hot water system further comprises, when the hot water user has a hot water demand:
preferentially using the solar thermal collector for supplying hot water, if the heat supply of the solar thermal collector cannot meet the requirements of hot water users, simultaneously starting a water replenishing pump to feed the softened water of the softener into the high-temperature electric heat storage steam generation system for heating, feeding the generated steam into the steam branch pipeline through the steam main pipeline, mixing the steam with low-temperature water to obtain hot water with a certain temperature, and supplying the hot water to the hot water users through the hot water pipeline, thereby realizing the complementary heat supply of the high-temperature electric heat storage steam generation system and the solar thermal collector.
Preferably, when a user has a demand for both steam and hot water, tap water enters the solar heat collector to generate hot water through solar radiation heat collection, enters the heat storage water tank to be stored, and is supplied to the hot water user through a hot water pipeline;
simultaneously starting the water replenishing pump, and feeding the feed water softened by the softener into the high-temperature electric heat storage steam generation system for heating;
the steam generated by the high-temperature electric heat storage steam generation system is directly supplied to a steam user by a steam main pipeline;
if simultaneously solar collector heat supply can't satisfy the demand of hot water user to the hot water, just when high temperature electricity heat accumulation steam generation system can satisfy the demand of steam user to steam, steam that high temperature electricity heat accumulation steam generation system produced simultaneously gets into the steam branch pipe way through the steam main line, gets into in the heat storage water tank again, mixes with low temperature water and obtains the hot water of certain temperature, and rethread hot water pipeline supplies for the hot water user, has realized the step heat accumulation heat supply of high temperature electricity heat accumulation steam generation system and solar collector.
The technical scheme of the application has the following beneficial effects:
1. according to the wind power generation device and the photovoltaic power generation device, the generated electric energy can be integrated into a power grid for consumption and can be independently and directly used for heat storage, and a thermoelectric cooperative microgrid is formed.
2. The high-temperature electric heat storage steam generation system and the heat storage water tank form step heat storage of energy, the high-temperature electric heat storage steam generation system can directly generate steam products, the heat storage water tank can store hot water from the solar heat collector and hot water obtained by mixing steam and low-temperature water, step heat storage and heat supply of the high-temperature electric heat storage steam generation system and the solar heat collector are achieved, and the requirements of users on different tastes of heat are met.
3. This application can utilize multiple clean energy to generate electricity, and thermoelectric coordinated operation to can adopt different kinds of heat accumulation medium, realize the step heat accumulation of energy, improve energy utilization.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a thermoelectric cooperative system based on multi-energy complementation and step heat storage according to the present application;
FIG. 2 is a schematic structural diagram of a power supply system composed of the clean energy power generation device and a power grid;
illustration of the drawings:
the system comprises a power grid 1, a wind power generation device 2, a photovoltaic power generation device 3, a softener 4, a water supplementing pump 5, a high-temperature electric heat storage steam generation system 6, a steam main pipeline 7, a steam branch pipeline 8, a solar heat collector 9, a heat storage water tank 10, a hot water pipeline 11, a hot water user 12 and a steam user 13.
Detailed Description
Reference will now be made in detail to embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following examples do not represent all embodiments consistent with the present application. But merely as exemplifications of systems and methods consistent with certain aspects of the application, as recited in the claims.
Referring to fig. 1, a schematic diagram of a thermoelectric cooperative system based on multi-energy complementation and step heat storage according to the present application is shown.
The thermoelectric cooperative system based on multi-energy complementation and step heat storage comprises a power grid 1, a clean energy power generation device, a water supplementing pump 5, a high-temperature electric heat storage steam generation system 6, a steam main pipeline 7, a steam branch pipeline 8, a solar heat collector 9, a heat storage water tank 10, a hot water pipeline 11, a hot water user 12 and a steam user 13;
the output end of the clean energy power generation device is respectively connected with the power grid 1 and the high-temperature electric heat storage steam generation system 6 and is used for generating electric energy to supply power to the power grid 1 and the high-temperature electric heat storage steam generation system 6;
the input end of the high-temperature electric heat storage steam generation system 6 is electrically connected with the power grid 1 and is used for performing an electric heat storage process, converting electric energy into heat energy and storing the heat energy, and realizing the complementary heat storage of the power grid 1 and clean energy power generation;
the water replenishing pump 5 is connected with the high-temperature electric heat storage steam generation system 6 and is used for supplying water to the high-temperature electric heat storage steam generation system 6;
the high-temperature electric heat storage steam generation system 6 is directly connected with a steam user 13 through the steam main pipeline 7 and is used for supplying steam to the steam user 13;
the inlet end of the steam branch pipeline 8 is connected with the main steam pipeline 7, the outlet end of the steam branch pipeline 8 is connected with the input end of the heat storage water tank 10, and the steam branch pipeline is used for conveying steam generated in the high-temperature electric heat storage steam generating system 6 to the heat storage water tank 10 through the main steam pipeline 7 and the steam branch pipeline 8;
the outlet end of the solar heat collector 9 is also connected with the input end of the heat storage water tank 10, and is used for collecting the tap water through solar radiation to generate hot water, and the hot water enters the heat storage water tank 10 for storage;
the output end of the heat storage water tank 10 is connected with a hot water user 12 through the hot water pipeline 11 and is used for supplying hot water to the hot water user 12 through the hot water pipeline 11, so that complementary heat supply of the high-temperature electric heat storage steam generation system 6 and the solar heat collector 9 is realized.
As shown in fig. 2, the clean energy power generation apparatus includes a wind power generation apparatus 2 and a photovoltaic power generation apparatus 3;
the output end of the wind power generation device 2 is respectively connected with the power grid 1 and the high-temperature electric heat storage steam generation system 6;
the output end of the photovoltaic power generation device 3 is also respectively connected with the power grid 1 and the high-temperature electric heat storage steam generation system 6.
The water supply device further comprises a softener 4, wherein the softener 4 is connected with an input end of the water replenishing pump 5 and is used for softening tap water.
A thermoelectric cooperation method based on multi-energy complementation and step heat storage is applied to the thermoelectric cooperation system based on multi-energy complementation and step heat storage, and comprises the following steps:
when the electricity price of the power grid 1 is higher than a set maximum threshold value and the heat stored by the high-temperature electricity heat storage steam generation system 6 is higher than a maximum charging threshold value, the electric energy generated by the wind power generation device 2 and the photovoltaic power generation device 3 is merged into the power grid 1 to be consumed and used, the load of the power grid 1 is shared, and the complementary power supply of wind energy, solar energy power generation and the power grid is realized;
when the electricity price of the power grid 1 is lower than a set minimum threshold value and the high-temperature electric heat storage steam generation system 6 is lower than a minimum charging threshold value, the electric energy generated by the clean energy power generation device is preferably and completely transmitted to the high-temperature electric heat storage steam generation system 6, the electric heat storage process is carried out to convert the electric energy into heat energy to be stored, and the heat energy stored by the high-temperature electric heat storage steam generation system 6 is higher than a maximum charging threshold value, so that the residual electric energy is merged into the power grid 1;
if the electricity price of the power grid 1 is between a set minimum threshold value and a set maximum threshold value and the heat stored by the high-temperature electric heat storage steam generation system 6 is higher than the maximum charging threshold value, the electric energy generated by the wind power generation device 2 and the photovoltaic power generation device 3 is merged into the power grid 1 for consumption;
if the electricity price of the power grid 1 is between a set minimum threshold value and a set maximum threshold value and the stored heat of the high-temperature electric heat storage steam generation system 6 is lower than a minimum charging threshold value, the electric energy generated by the wind power generation device 2 and the photovoltaic power generation device 3 is transmitted to the high-temperature electric heat storage steam generation system 6, and the electric heat storage process is carried out to convert the electric energy into heat energy;
if the electricity price of the power grid 1 is between a set minimum threshold value and a set maximum threshold value, and the heat stored in the high-temperature electric heat storage steam generation system 6 is continuously lower than a minimum charging threshold value, the electric energy of the power grid 1 is transmitted to the high-temperature electric heat storage steam generation system 6, and the electric heat storage process is carried out to convert the electric energy into heat energy to be stored;
if the electricity price of the power grid 1 is higher than a set maximum threshold value and the high-temperature electric heat storage steam generation system 6 is lower than a minimum charging threshold value, electric energy generated by the wind power generation device 2 and the photovoltaic power generation device 3 is preferentially transmitted to the high-temperature electric heat storage steam generation system 6, and is converted into heat energy to be stored in the electric heat storage process, so that complementary heat storage of wind energy, solar energy power generation and the power grid is realized;
when a hot water user 12 has a hot water demand, running water is conveyed into a heat storage water tank 10 through hot water produced by solar radiation heat collection in a solar heat collector 9 and then supplied to the hot water user 12 through a hot water pipeline 11;
or tap water is used for generating steam through the high-temperature electric heat storage steam generation system 6, enters the steam branch pipeline 8 through the steam main pipeline 7, then enters the heat storage water tank 10, is mixed with low-temperature water to obtain hot water with a certain temperature, and is supplied to a hot water user 12 through the hot water pipeline 11;
when a steam user 13 has a steam demand, the water replenishing pump 5 is started to deliver the water softened by the softener 4 to the high-temperature electric heat storage steam generating system 6 for heating, and the steam generated in the high-temperature electric heat storage steam generating system 6 is directly supplied to the steam user 13 through the steam main pipeline 7.
If the electricity price of the power grid 1 is higher than a set maximum threshold value and the high-temperature electric heat storage steam generation system 6 is lower than a minimum charging threshold value, the electric energy generated by the wind power generation device 2 and the photovoltaic power generation device 3 is preferentially transmitted to the high-temperature electric heat storage steam generation system 6, and the electric heat storage process is performed to convert the electric energy into heat energy for storage, and then the method further comprises the following steps:
until the heat stored in the high-temperature electric heat storage steam generation system 6 is higher than a specific charging threshold value, the residual electric energy is merged into the power grid 1;
if the heat stored in the high-temperature electric heat storage steam generation system 6 is continuously lower than the specific charging threshold value, the electric energy of the power grid 1 is transmitted to the high-temperature electric heat storage steam generation system 6, so that the complementary heat storage of wind energy, solar energy power generation and the power grid is realized;
the particular charging threshold is between a maximum charging threshold and a minimum charging threshold.
When the hot water user 12 has a hot water demand, the method further comprises the following steps:
preferentially using the solar heat collector 9 for supplying hot water, if the heat supply of the solar heat collector 9 cannot meet the requirement of the hot water user 12, simultaneously starting the water replenishing pump 5 to feed the water softened by the softener 4 into the high-temperature electric heat storage steam generation system 6 for heating, feeding the generated steam into the steam branch pipeline 8 through the steam main pipeline 7, mixing the steam with low-temperature water to obtain hot water with a certain temperature, and supplying the hot water to the hot water user 12 through the hot water pipeline 11, so that the complementary heat supply of the high-temperature electric heat storage steam generation system 6 and the solar heat collector 9 is realized.
When the heat stored by the high-temperature electric heat storage steam generation system 6 is between the minimum charging threshold and the maximum charging threshold, the high-temperature electric heat storage steam generation system 6 can enter a heat storage and release state, and at the moment, steam and hot water can be supplied simultaneously and can be used together with the hot water supplied by the solar heat collector 9.
When a user has a demand for both steam and hot water, tap water enters the solar heat collector 9, generates hot water through solar radiation heat collection, enters the heat storage water tank 10 for storage, and is supplied to a hot water user 12 through a hot water pipeline 11;
meanwhile, the water replenishing pump 5 is started, and the feed water softened by the softener 4 is sent to the high-temperature electric heat storage steam generation system 6 for heating;
the steam generated by the high-temperature electric heat-storage steam generating system 6 is directly supplied to a steam user 13 through a main steam pipeline 7;
if simultaneously solar collector 9 heat supply can't satisfy hot water user 12 is to the hydrothermal demand, just when high temperature electricity heat accumulation steam generation system 6 can satisfy steam user 13 demand to steam, the steam that high temperature electricity heat accumulation steam generation system 6 produced simultaneously gets into steam branch pipe 8 through steam main line 7, gets into in the hot water storage tank 10 again, mixes with low temperature water and obtains the hot water of certain temperature, rethread hot water pipeline 11 supplies for hot water user 12, has realized the step heat accumulation heat supply of high temperature electricity heat accumulation steam generation system 6 with solar collector 9, has satisfied the user to the thermal demand of different tastes.
The set thresholds can be adjusted according to the local actual operation condition, and the economic benefit and the energy utilization rate of the micro-grid thermoelectric cooperation are considered.
This application can utilize multiple clean energy to generate electricity, and thermoelectric coordinated operation to can adopt different kinds of heat accumulation medium, realize the step heat accumulation of energy, improve energy utilization.
The embodiments provided in the present application are only a few examples of the general concept of the present application, and do not limit the scope of the present application. Any other embodiments extended according to the scheme of the present application without inventive efforts will be within the scope of protection of the present application for a person skilled in the art.
Claims (7)
1. A thermoelectric cooperative system based on multi-energy complementation and step heat storage is characterized in that,
the thermoelectric cooperation system comprises a power grid (1), a clean energy power generation device, a water replenishing pump (5), a high-temperature electric heat storage steam generation system (6), a steam main pipeline (7), a steam branch pipeline (8), a solar heat collector (9), a heat storage water tank (10), a hot water pipeline (11), a hot water user (12) and a steam user (13);
the output end of the clean energy power generation device is respectively connected with the power grid (1) and the high-temperature electric heat storage steam generation system (6) and is used for generating electric energy to supply power to the power grid (1) and the high-temperature electric heat storage steam generation system (6);
the input end of the high-temperature electric heat storage steam generation system (6) is electrically connected with the power grid (1) and is used for performing an electric heat storage process, converting electric energy into heat energy and storing the heat energy, and realizing the complementary heat storage of the power grid (1) and clean energy power generation;
the water replenishing pump (5) is connected with the high-temperature electric heat storage steam generation system (6) and is used for supplying water to the high-temperature electric heat storage steam generation system (6);
the high-temperature electric heat storage steam generation system (6) is directly connected with a steam user (13) through the main steam pipeline (7) and is used for supplying steam to the steam user (13);
the inlet end of the steam branch pipeline (8) is connected with the main steam pipeline (7), the outlet end of the steam branch pipeline is connected with the input end of the heat storage water tank (10) and used for conveying steam generated in the high-temperature electric heat storage steam generation system (6) to the heat storage water tank (10) through the main steam pipeline (7) and the steam branch pipeline (8);
the outlet end of the solar heat collector (9) is also connected with the input end of the heat storage water tank (10) and is used for collecting the tap water through solar radiation to generate hot water which enters the heat storage water tank (10) for storage;
the output end of the heat storage water tank (10) is connected with a hot water user (12) through the hot water pipeline (11) and used for supplying hot water to the hot water user (12) through the hot water pipeline (11), and complementary heat supply of the high-temperature electric heat storage steam generation system (6) and the solar heat collector (9) is achieved.
2. The cogeneration synergy system based on multipotential complementation and step heat storage according to claim 1, characterized in that the clean energy power generation device comprises a wind power generation device (2) and a photovoltaic power generation device (3);
the output end of the wind power generation device (2) is respectively connected with the power grid (1) and the high-temperature electric heat storage steam generation system (6);
the output end of the photovoltaic power generation device (3) is also respectively connected with the power grid (1) and the high-temperature electric heat storage steam generation system (6).
3. The thermoelectricity collaborative system based on the multi-energy complementation and the step heat storage is characterized by further comprising a softener (4), wherein the softener (4) is connected with an input end of the water replenishing pump (5) and is used for softening tap water.
4. A thermoelectric cooperation method based on multi-energy complementation and step heat storage, which is applied to the thermoelectric cooperation system based on multi-energy complementation and step heat storage of any one of claims 1 to 3, and comprises the following steps:
when the electricity price of the power grid (1) is higher than a set maximum threshold value and the stored heat of the high-temperature electricity heat storage steam generation system (6) is higher than a maximum charging threshold value, the electric energy generated by the wind power generation device (2) and the photovoltaic power generation device (3) is merged into the power grid (1) for consumption and use, the load of the power grid (1) is shared, and the complementary power supply of wind energy, solar energy power generation and the power grid is realized;
when the electricity price of the power grid (1) is lower than a set minimum threshold value and the high-temperature electric heat storage steam generation system (6) is lower than a minimum charging threshold value, all electric energy generated by the clean energy power generation device is preferentially transmitted to the high-temperature electric heat storage steam generation system (6), the electric heat storage process is carried out to convert the electric energy into heat energy to be stored until the stored heat of the high-temperature electric heat storage steam generation system (6) is higher than a maximum charging threshold value, and then the residual electric energy is merged into the power grid (1);
if the electricity price of the power grid (1) is between a set minimum threshold value and a set maximum threshold value and the heat stored by the high-temperature electric heat storage steam generation system (6) is higher than a maximum charging threshold value, the electric energy generated by the wind power generation device (2) and the photovoltaic power generation device (3) is merged into the power grid (1) for consumption;
if the electricity price of the power grid (1) is between a set minimum threshold value and a set maximum threshold value and the stored heat of the high-temperature electric heat storage steam generation system (6) is lower than a minimum charging threshold value, the electric energy generated by the wind power generation device (2) and the photovoltaic power generation device (3) is transmitted to the high-temperature electric heat storage steam generation system (6) to carry out an electric heat storage process to convert the electric energy into heat energy;
if the electricity price of the power grid (1) is between a set minimum threshold value and a set maximum threshold value, and the heat stored in the high-temperature electric heat storage steam generation system (6) is continuously lower than a minimum charging threshold value, the electric energy of the power grid (1) is transmitted to the high-temperature electric heat storage steam generation system (6) to be converted into heat energy in the electric heat storage process to be stored;
if the electricity price of the power grid (1) is higher than a set maximum threshold value and the high-temperature electric heat storage steam generation system (6) is lower than a minimum charging threshold value, electric energy generated by the wind power generation device (2) and the photovoltaic power generation device (3) is preferentially transmitted to the high-temperature electric heat storage steam generation system (6) to be converted into heat energy in an electric heat storage process and stored;
when a hot water user (12) has a hot water demand, tap water is conveyed into a heat storage water tank (10) in a solar heat collector (9) through solar radiation heat collection to generate hot water, and then the hot water is supplied to the hot water user (12) through a hot water pipeline (11);
or tap water is used for generating steam through the high-temperature electric heat storage steam generation system (6), enters the steam branch pipeline (8) through the steam main pipeline (7), then enters the heat storage water tank (10), is mixed with low-temperature water to obtain hot water at a certain temperature, and is supplied to a hot water user (12) through the hot water pipeline (11);
when a steam user (13) has a steam demand, the water supplementing pump (5) is started to send the water softened by the softener (4) to the high-temperature electric heat storage steam generating system (6) for heating, and the steam generated in the high-temperature electric heat storage steam generating system (6) is directly supplied to the steam user (13) through the steam main pipeline (7).
5. The method for thermoelectric synergy based on multi-energy complementation and step heat storage as claimed in claim 4,
if the electricity price of the power grid (1) is higher than a set maximum threshold value and the high-temperature electric heat storage steam generation system (6) is lower than a minimum charging threshold value, electric energy generated by the wind power generation device (2) and the photovoltaic power generation device (3) is preferentially transmitted to the high-temperature electric heat storage steam generation system (6) to be converted into heat energy in an electric heat storage process and stored, and the method further comprises the following steps:
until the heat stored by the high-temperature electric heat storage steam generation system (6) is higher than a specific charging threshold value, the surplus electric energy is merged into the power grid (1);
if the heat stored by the high-temperature electric heat storage steam generation system (6) is continuously lower than the specific charging threshold value, the electric energy of the power grid (1) is transmitted to the high-temperature electric heat storage steam generation system (6), and the complementary heat storage of wind energy, solar energy power generation and the power grid is realized;
the particular charging threshold is between a maximum charging threshold and a minimum charging threshold.
6. The method for thermoelectric synergy based on multi-energy complementation and step heat storage is characterized in that the method further comprises the following steps when a hot water user (12) needs hot water:
preferentially using the solar heat collector (9) for supplying hot water, if the heat supply of the solar heat collector (9) can not meet the requirement of the hot water user (12), simultaneously starting the water replenishing pump (5) to feed the softened water of the softener (4) into the high-temperature electric heat storage steam generation system (6) for heating, feeding the generated steam into the steam branch pipeline (8) through the steam main pipeline (7), and feeding the steam into the heat storage water tank (10) to be mixed with low-temperature water to obtain hot water with a certain temperature, and supplying the hot water user (12) through the hot water pipeline (11), so that the complementary heat supply of the high-temperature electric heat storage steam generation system (6) and the solar heat collector (9) is realized.
7. The method for thermoelectric synergy based on multi-energy complementation and step heat storage as claimed in claim 4,
when a user has demands on both steam and hot water, tap water enters the solar heat collector (9) to generate hot water through solar radiation heat collection, enters the heat storage water tank (10) to be stored, and is supplied to a hot water user (12) through the hot water pipeline (11);
simultaneously starting the water replenishing pump (5), and feeding the water supply softened by the softener (4) into the high-temperature electric heat storage steam generation system (6) for heating;
the steam generated by the high-temperature electric heat storage steam generating system (6) is directly supplied to a steam user (13) through a steam main pipeline (7);
if simultaneously solar collector (9) heat supply can't satisfy hot water user (12) is to the hydrothermal demand, just when high temperature electricity heat accumulation steam generation system (6) can satisfy steam user (13) demand to steam, the steam that high temperature electricity heat accumulation steam generation system (6) produced simultaneously gets into steam branch pipe way (8) through steam main line (7), gets into in heat storage water tank (10) again, mixes with low temperature water and obtains the hot water of certain temperature, and rethread hot water pipeline (11) supply is for hot water user (12), has realized the step heat accumulation heat supply of high temperature electricity heat accumulation steam generation system (6) and solar collector (9).
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