New energy heat storage re-power generation system and parameter optimization method

Abstract

The invention provides a new energy heat storage re-power generation system and a parameter optimization method. The new energy heat storage re-power generation system comprises an electricity-heat conversion device, a fused salt heat storage device, a thermoelectric conversion device and a controller, the input end of the electricity-heat conversion device is connected to the new energy power station, the electricity-heat conversion device is connected with the fused salt heat storage device, the fused salt heat storage device is connected with the thermoelectric conversion device, and the output end of the thermoelectric conversion device is connected to a power grid; the electro-thermal conversion device comprises a first on-off controller; the thermoelectric conversion device comprises a second on-off controller; the controller is configured to control the on-off states of the first on-off controller and the second on-off controller based on a power generation power signal and a power grid demand signal of the new energy power station; the parameter optimization method provided by the invention is used for controlling the new energy heat storage re-power generation system. According to the invention, the electricity-heat conversion device is used for converting fluctuating new energy electric power such as wind power, photovoltaic power and the like into heat energy, and the heat energy is efficiently stored in fused salt to realize continuous and reliable power supply to a power grid.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy system control and optimization, and particularly relates to a new energy heat storage and power generation system and a parameter optimization method. BACKGROUND

[0002] With the increasing proportion of new energy installation, the demand for long-time energy storage of the power system is increasingly urgent, and due to the intermittency and volatility of wind power and photovoltaic power, the current mainstream short-time energy storage of 2-4 hours can smooth short-term power fluctuations, but it is difficult to cope with power shortage caused by continuous bad weather. When new energy becomes the main power supply, the system urgently needs energy regulation capacity across days, weeks or even seasons, and long-time energy storage (usually more than 4 hours of continuous discharge, even dozens of hours) is the key to ensuring stable energy supply.

[0003] For the power generation side, it is urgent to have a technology that can store excess wind and light power on a large scale and convert volatile new energy into stable and reliable power to fundamentally solve the problem of abandoned wind and light; for the power grid side, it is urgent to introduce high-quality flexible regulation scheme to realize efficient peak clipping and valley filling. SUMMARY

[0004] The purpose of the present application is to solve at least one problem in the background art.

[0005] The first aspect of the present application provides a new energy heat storage and power generation system, comprising an electric-thermal conversion device, a molten salt heat storage device, a thermal-electric conversion device and a controller, the input end of the electric-thermal conversion device is connected to a new energy power station, the electric-thermal conversion device is connected to the molten salt heat storage device, the molten salt heat storage device is connected to the thermal-electric conversion device, and the output end of the thermal-electric conversion device is connected to a power grid; the electric-thermal conversion device comprises a first on-off controller; the thermal-electric conversion device comprises a second on-off controller; the controller is configured to control the on-off state of the first on-off controller and the second on-off controller based on the new energy power station power generation power signal and the power grid demand signal.

[0006] Further, the electric-thermal conversion device is an electric boiler, and the electric boiler comprises an on-off control element, and the on-off control element comprises an alternating current contactor and / or a relay.

[0007] Further, the molten salt heat storage device is a resistance type molten salt heat storage device, and the resistance type molten salt heat storage device comprises a cold salt tank, a transfer heating area, a hot salt tank and a resistance heating rod, the resistance heating rod is used for heating the molten salt in the cold salt tank, the hot salt tank is used for storing the heated molten salt, and the resistance heating rod is arranged in the transfer heating area.

[0008] Further, the thermoelectric conversion device is a steam turbine generator; the molten salt heat storage device and the solid particle heat storage device are coupled in series, and the heat energy stored in the molten salt can be further transmitted to the solid particle heat storage device for promotion and storage; and the solid particle heat storage device is used for converting heat energy into steam to drive the steam turbine generator.

[0009] Further, the electrothermal conversion device is a high-temperature heat pump, and the high-temperature heat pump is coupled with the molten salt heat storage device through a heat exchanger.

[0010] Further, the thermoelectric conversion device is an organic Rankine cycle generator, and the molten salt heat storage device is coupled with the thermoelectric conversion device through a molten salt-organic working medium heat exchanger.

[0011] Further, the electrothermal conversion device is a resistance type molten salt electric heating device; the molten salt heat storage device is a double-tank molten salt heat storage device; and the thermoelectric conversion device is a subcritical steam turbine generator unit.

[0012] Further, the electrothermal conversion device comprises a PID control module configured to close-loop regulate and control the heating power of the electrothermal conversion device based on a new energy power grid operation state signal. The second aspect of the present application provides a parameter optimization method for controlling the new energy heat storage and power generation system. During a low valley electricity price period or a new energy abandoned electricity period, the first on-off controller is closed, and the heat energy generated by the electrothermal conversion device is stored in the molten salt heat storage device. During a high peak power demand period, the second on-off controller is closed, so that the high-temperature molten salt in the molten salt heat storage device can be transported to the thermoelectric conversion device.

[0013] Further, the parameter optimization method further comprises a temperature control path for ensuring the safe temperature of the molten salt heat storage device.

[0014] Further, the parameter optimization method further comprises a multi-objective coordinated control path; the multi-objective coordinated control path is used for ensuring that the temperature of the molten salt heat storage device is in a safe working interval while meeting the power grid dispatching demand.

[0015] The beneficial effects of the present application are: the present application converts fluctuating new energy power such as wind power and photovoltaic power into heat energy by using an electric heat conversion device, and stores the heat energy in molten salt efficiently; in the period of no wind and no light and high peak of power demand, the system can release the stored heat energy on demand, and convert it into stable power by a power generation device, so as to realize continuous and reliable power supply to the power grid; since the power is used as the energy input source instead of relying on direct solar radiation or geographical conditions, the present application has stronger adaptability and flexibility in site selection; the present application is not restricted by factors such as wind and light resource distribution or site orientation, and can be applied in various scenes such as load centers, decommissioned power plants and industrial parks, so as to greatly improve the deployment feasibility and regional adaptability of the project. BRIEF DESCRIPTION OF DRAWINGS Figure 1 is a schematic diagram of an embodiment of the present application; Marked as: 1-new energy power station; 2-boosting station and sending line; 3-power grid; 4-electric heat conversion device; 5-molten salt heat storage device; 6-thermal power conversion device. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantages of the application clearer, the technical scheme of the application will be described clearly below in combination with the drawings in the application. Obviously, the described embodiments are part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the application.

[0017] In the description of the embodiments of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0018] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0019] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in the present specification and the features of the different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0020] As shown in Figure 1 The present application provides a new energy heat storage and power generation system, which comprises an electric-thermal conversion device 4, a molten salt heat storage device 5, a thermal-electric conversion device 6 and a controller. The input end of the electric-thermal conversion device 4 is connected to a new energy power station 1. The electric-thermal conversion device 4 is connected to the molten salt heat storage device 5. The molten salt heat storage device 5 is connected to the thermal-electric conversion device 6. The output end of the thermal-electric conversion device 6 is connected to a power grid 3. The electric-thermal conversion device 4 comprises a first on-off controller. The thermal-electric conversion device 6 comprises a second on-off controller. The controller is configured to control the on-off state of the first on-off controller and the second on-off controller based on the power generation power signal of the new energy power station 1 and the demand signal of the power grid 3. Normally, the new energy power station 1 is directly connected to the power grid through a booster station and a sending line 2. The system provided by the present application can store the intermittent and unstable new energy power (such as wind power and photovoltaic power) as heat energy when the power generation peak or the power grid 3 cannot be accommodated, due to the arrangement of the electric-thermal conversion device 4, the molten salt heat storage device 5 and the thermal-electric conversion device 6. This directly reduces the waste of "abandoned wind and light", and greatly improves the utilization rate of new energy.

[0021] The molten salt heat storage device 5 is used to store the energy generated by the electric-thermal conversion device 4. It mainly uses metal salt (such as sodium nitrate, potassium nitrate, etc.) as medium, and its working temperature range is relatively wide, usually between 280℃ and 565℃, and the high-temperature type molten salt can even reach more than 600℃. The main technical advantages include: high energy storage density, low scale cost, service life up to 25-30 years, and no pollutants generated during operation. In addition, the molten salt heat storage can realize long-time energy storage of more than 10 hours at a time.

[0022] The thermal-electric conversion device 6 is used to convert the heat energy stored in the molten salt heat storage device 5 into electric energy, which can be a thermoelectric (TEG) module, a Stirling large motor, etc. In one embodiment, the thermal-electric conversion device 6 is a steam turbine generator set, which can provide inertia support for the power system, and is beneficial to enhance the frequency and voltage stability of the power grid 3.

[0023] In one embodiment, the electrothermal conversion device 4 is an electric boiler, and the electric boiler comprises an on-off control element, and the on-off control element comprises an alternating current contactor and / or a relay.

[0024] In one embodiment, the molten salt heat storage device 5 is a resistance type molten salt heat storage device 5, and the resistance type molten salt heat storage device 5 comprises a cold salt tank, a transfer heating area, a hot salt tank, and a resistance heating rod for heating the molten salt in the cold salt tank, and the hot salt tank is used for storing the heated molten salt, and the resistance heating rod is arranged in the transfer heating area.

[0025] The resistance type molten salt electric heating technology is a relatively mature electric heating method at present, and the working principle thereof is to convert electric energy into heat energy by using the Joule effect generated when an electric current passes through a resistance wire, and then to transfer the heat energy to a molten salt medium through heat exchange, so as to realize stable conversion of electric energy into heat energy. The resistance type molten salt electric heating technology has the advantages of simple structure, easy combination in series and parallel, large power of single device, uniform heating temperature, wide applicability, fast response to load changes, and the like. At present, the resistance type molten salt electric heater mainly has two voltage grades, i.e., low voltage (such as 380V and 690V) and medium voltage (such as 6kV and 10kV). Compared with the low voltage system, the medium and high voltage electric heating system can reduce the number of power distribution equipment, thereby reducing the system investment cost, improving the electric energy conversion efficiency, saving the occupied area, and having better comprehensive technical and economic performance. Considering the equipment cost, system efficiency, and technical maturity, the resistance type molten salt electric heating technology with high voltage grade (10kV) can also be adopted.

[0026] In one embodiment, the molten salt heat storage device 5 is an electromagnetic induction molten salt electric heating device. That is, a metal material is placed in an alternating magnetic field to generate an induced current, thereby generating Joule heat to increase the temperature of the metal material, and the metal material is used to heat the molten salt. The electromagnetic induction molten salt electric heating device mainly comprises an induction heating power supply, an induction coil, and a metal pipeline to be heated. The electromagnetic induction heating first converts alternating current into direct current through a rectifier bridge, and then converts the direct current into alternating current with a higher frequency through an inverter. The induction power supply is connected to the coil and inputs alternating current to the coil. An alternating magnetic field with the same frequency is generated around the coil and induces an induced current (eddy current) on the metal pipeline. The induced current flows in the pipeline wall and generates Joule heat to heat the pipeline. Then, the heat is transferred to the molten salt flowing in the pipeline through heat conduction, and the molten salt is heated to a set temperature. The electromagnetic induction heating has the advantages of uniform heating and no dead zone in the pipeline.

[0027] In one embodiment, the molten salt thermal storage device 5 is an electrode-type molten salt electric heating device. The core principle of the electrode-type molten salt electric heating device is to utilize the resistive characteristics of the molten salt itself, and to directly introduce current into the molten salt through electrodes, causing the molten salt to heat up. Although the power control during the operation of the electrode-type molten salt electric heating device is difficult due to the large variation in the conductivity of the molten salt with temperature, resulting in poor equipment stability, the electrode-type molten salt electric heating device has a fast response and is suitable for ultra-high power scenarios.

[0028] In one embodiment, the thermoelectric conversion device 6 is a steam turbine generator. Steam turbine generators are widely used in coal-fired power plants, solar thermal power plants, and other projects. Their core working process is as follows: thermal energy heats water into high-temperature, high-pressure steam, which drives the turbine blades to rotate, converting thermal energy into mechanical energy. The turbine then drives the generator rotor to rotate at high speed, thereby generating electrical energy through electromagnetic induction. Steam turbine generators can be classified into ultra-high pressure, subcritical, supercritical, and ultra-supercritical units based on steam parameters. Considering the equipment adaptability and operational flexibility requirements of this invention, supercritical steam turbine generator units are preferred.

[0029] In one embodiment, the thermoelectric conversion device 6 is a steam turbine generator; the molten salt thermal storage device 5 is coupled in series with the solid particle thermal storage device, and the thermal energy stored in the molten salt can be further transferred to the solid particle thermal storage device for enhancement and storage; the solid particle thermal storage device is used to convert thermal energy into steam to drive the steam turbine generator. By coupling the solid particle thermal storage device to the molten salt thermal storage device 5, the thermal energy quality is improved and efficient storage is achieved; the solid particles, as a thermal storage medium, have high-temperature resistance characteristics and can achieve high-parameter thermal storage of 400℃ to 800℃ under normal pressure, significantly higher than the temperature limit of traditional nitrate molten salt (≤565℃), thus meeting the high-temperature steam requirements of supercritical or ultra-supercritical steam turbine generator sets; at the same time, the solid particle thermal storage device has high energy density and low heat loss, which is more conducive to long-term storage. The solid particle thermal storage device may include high-temperature ceramic particles, metallurgical fertilizer particles, etc.

[0030] In one embodiment, the electrothermal conversion device 4 is a high-temperature heat pump, and the molten salt thermal storage device 5 is a molten salt thermal storage device 5, with the high-temperature heat pump coupled to the molten salt thermal storage device 5. A high-temperature heat pump is a thermal system equipment that efficiently converts electrical energy into high-temperature heat energy, mainly composed of thermal equipment such as a compressor and a heat exchanger. Through a reverse Carnot cycle, the high-temperature heat pump can absorb heat from waste heat in the environment or process flow, and supplemented by wind and solar power curtailment or off-peak electricity from thermal power plants, to produce high-grade heat, significantly improving electrothermal efficiency. The high-temperature heat pump is coupled to the molten salt thermal storage device 5 through a heat exchanger.

[0031] In one embodiment, an electrode heating device is provided between the high-temperature heat pump and the molten salt thermal storage device 5. The high-temperature heat pump heats the circulating working fluid to a medium temperature, and then the electrode heats the circulating working fluid to a high temperature. The high-temperature circulating working fluid is then introduced into the heat exchanger to transfer heat to the molten salt thermal storage device 5.

[0032] In one embodiment, the molten salt thermal storage device 5 is a molten salt thermal storage device 5, and the thermoelectric conversion device 6 is an organic Rankine cycle generator. The molten salt thermal storage device 5 and the thermoelectric conversion device 6 are coupled through a molten salt-organic working fluid heat exchanger. Molten salt thermal storage technology can effectively address the problems of discontinuous and unstable surplus power in the new energy grid 3. However, due to the relatively low storage temperature achieved by molten salt thermal storage, it is not well-suited for traditional steam turbines. The organic Rankine cycle generator (ORC technology) is more suitable for medium- and low-temperature heat sources. Therefore, the combination of the two forms a natural complementary advantage: the molten salt thermal storage system converts unstable electrical energy into stable and controllable medium- and low-temperature thermal energy, while the organic Rankine cycle generator efficiently converts this thermal energy into electrical energy. This coupling not only significantly improves the overall energy utilization efficiency and enhances the regulation capability and power supply reliability of the grid 3, but also provides a feasible technical path for the large-scale and commercial power generation of medium- and low-temperature heat sources, demonstrating good economic viability and application prospects.

[0033] In one embodiment, the electrothermal conversion device 4 is a high-voltage resistance molten salt electric heating device; the molten salt thermal storage device 5 includes a dual-tank molten salt thermal storage device 5; and the thermoelectric conversion device 6 is a subcritical steam turbine generator set.

[0034] In one embodiment, the electrothermal conversion device 4 includes a PID control module, which is configured to control the heating power of the electrothermal conversion device 4 in a closed loop based on the operating status signal of the new energy power grid 3. The PID control module, configured between the electrothermal conversion device 4 and the new energy power grid 3, can be used to monitor the frequency, voltage, and new energy output fluctuations on the grid 3 side in real time, dynamically adjust the input power of the electrothermal conversion device 4, achieve rapid response and smooth absorption of curtailed wind and solar power, and improve the stability and energy efficiency of the system operation.

[0035] This invention also provides a parameter optimization method for controlling the aforementioned new energy thermal storage and regeneration system, comprising: during off-peak electricity prices or periods of new energy curtailment, closing the first on / off controller, storing the heat energy generated by the electrothermal conversion device 4 in the molten salt thermal storage device 5; when the system needs to generate electricity externally, closing the second on / off controller, allowing the high-temperature molten salt in the molten salt thermal storage device 5 to be transported to the thermoelectric conversion device 6. The new energy thermal storage and regeneration system achieves precise management of energy flow through on / off control, avoiding ineffective energy circulation or equipment conflicts, ensuring that each part of the system operates under optimal conditions, and facilitating equipment isolation and maintenance, thus improving safety. Specifically, when the new energy power generation exceeds the power that the grid 3 can absorb, and the molten salt thermal storage device 5 is not at full capacity; closing the first on / off controller starts the electrothermal conversion device 4; opening the second on / off controller stops the thermoelectric conversion device 6; when the new energy power generation is stable and can be fully absorbed by the grid 3, opening both the first and second on / off controllers.

[0036] When a new energy thermal storage and power generation system includes a solid particle thermal storage device, the method for controlling the system further includes: transferring thermal energy to the solid particle molten salt thermal storage device 5 for further heating and then using it for steam generation.

[0037] In one embodiment, the parameter optimization method includes a temperature control path to ensure the safe temperature of the molten salt thermal storage device 5. Specifically, when the temperature of the molten salt thermal storage device 5 exceeds the limit, the first and second on / off controllers are forcibly disconnected, causing the system to enter a safe shutdown state.

[0038] In one embodiment, the parameter optimization method further includes a multi-objective coordinated control path; this path coordinates the power of the electrothermal conversion and thermoelectric conversion devices 6 to ensure that the temperature of the molten salt thermal storage device 5 remains within a safe operating range while meeting the dispatching requirements of the power grid 3. For example, when the power grid 3 simultaneously requires frequency regulation services (requiring rapid power changes), the controller can assess the impact of this action on the molten salt temperature in real time and achieve the optimal balance between meeting frequency regulation requirements and controlling temperature fluctuations.

[0039] In summary, the advantages of this invention are: 1) Achieve stable power supply and enhance power security capabilities: This system utilizes an electrothermal conversion device 4 to convert fluctuating renewable energy sources such as wind and solar power into thermal energy, which is then efficiently stored in molten salt. During periods of low wind and solar power demand, the system can release the stored thermal energy as needed, converting it back into stable electricity through a mature and reliable steam turbine power generation system, thus ensuring a continuous and reliable power supply to the loads of grid 3. This not only achieves "electricity substitution" from renewable energy sources but also upgrades it to "dual substitution of electricity and renewable energy," significantly enhancing the power supply security and regulation flexibility of grid 3.

[0040] 2) Provide critical support services to enhance power system stability: Unlike wind and solar power projects that are directly connected to the grid or only equipped with electrochemical energy storage, this system outputs electrical energy through synchronous generators, naturally possessing rotational inertia and reactive power regulation capabilities. This characteristic helps enhance the frequency and voltage stability of Grid 3, effectively compensating for the insufficient system disturbance immunity caused by the high proportion of new energy access, providing important auxiliary services such as frequency and voltage regulation for the safe operation of Grid 3, and improving the robustness and reliability of the overall power system.

[0041] 3) Flexible energy input methods and minimal restrictions on project site selection: This system uses electricity as its energy input source, rather than relying on direct solar radiation or geographical conditions, thus offering greater adaptability and flexibility in site selection. Unrestricted by factors such as wind and solar resource distribution or site orientation, it can be implemented in various scenarios including load centers, decommissioned power plants, and industrial parks, significantly improving the project's deployment feasibility and regional adaptability.

[0042] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention are within the scope of protection claimed by the present invention.

Claims

1. A new energy heat storage and power generation system, characterized in that: it comprises an electric-thermal conversion device, a molten salt heat storage device, a thermal-electric conversion device and a controller, the input end of the electric-thermal conversion device is connected to a new energy power station, the electric-thermal conversion device is connected to the molten salt heat storage device, the molten salt heat storage device is connected to the thermal-electric conversion device, and the output end of the thermal-electric conversion device is connected to a power grid; the electric-thermal conversion device comprises a first on-off controller; the thermal-electric conversion device comprises a second on-off controller; and the controller is configured to control the opening and closing states of the first on-off controller and the second on-off controller based on a power generation power signal of the new energy power station and a demand signal of the power grid.

2. The new energy heat storage and power generation system according to claim 1, characterized in that: the electric-thermal conversion device is an electric boiler, and the electric boiler comprises an on-off control element, and the on-off control element comprises an AC contactor and / or a relay.

3. The new energy heat storage and power generation system according to claim 1, characterized in that: the molten salt heat storage device is a resistance type molten salt heat storage device, and the resistance type molten salt heat storage device comprises a cold salt tank, a transfer heating area, a hot salt tank and a resistance heating rod, the resistance heating rod is used for heating the molten salt in the cold salt tank, the hot salt tank is used for storing the heated molten salt, and the resistance heating rod is arranged in the transfer heating area.

4. The new energy heat storage and power generation system according to claim 1, characterized in that: the thermal-electric conversion device is a steam turbine generator; the molten salt heat storage device is connected to a solid particle heat storage device; and the solid particle heat storage device is used for driving the steam turbine generator.

5. The new energy heat storage and power generation system according to claim 1, characterized in that: the electric-thermal conversion device is a high-temperature heat pump, and the high-temperature heat pump is coupled with the molten salt heat storage device.

6. The new energy heat storage and power generation system according to claim 1, characterized in that: the thermal-electric conversion device is an organic Rankine cycle generator, and the molten salt heat storage device is coupled with the thermal-electric conversion device through a molten salt-organic working medium heat exchanger.

7. The new energy heat storage and power generation system according to claim 1, characterized in that: the electric-thermal conversion device is a resistance type molten salt electric heating device; the molten salt heat storage device is a double-tank type molten salt heat storage device; and the thermal-electric conversion device is a subcritical steam turbine generator unit.

8. The new energy heat storage and power generation system according to claim 1, characterized in that: the electric-thermal conversion device comprises a PID control module, and the PID control module is configured to close-loop regulate and control the heating power of the electric-thermal conversion device based on a new energy power grid operation state signal. including: in a low valley electricity price or new energy abandoned electricity period, the first on-off controller is closed, and the heat energy generated by the electric-thermal conversion device is stored in the molten salt heat storage device; in a power demand peak period, the second on-off controller is closed, so that the high-temperature molten salt in the molten salt heat storage device can be delivered to the thermal-electric conversion device.

10. The parameter optimization method according to claim 9, characterized in that: ​ ​ ​ ​ 9. A parameter optimization method for controlling the new energy heat storage and power generation system according to any one of claims 1-8, characterized in that, ​ ​ ​ ​ The multi-objective coordinated control path is used for guaranteeing that the temperature of the molten salt heat storage device is in a safe working interval while meeting power grid scheduling requirements.

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