CN116722568A

CN116722568A - Control method and device of light-storage electric heating system, light-storage electric heating system and power plant

Info

Publication number: CN116722568A
Application number: CN202310614846.3A
Authority: CN
Inventors: 张婧; 赵为; 邹海晏; 琚洋
Original assignee: Hefei Zero Carbon Technology Co ltd
Current assignee: Hefei Zero Carbon Technology Co ltd
Priority date: 2023-05-24
Filing date: 2023-05-24
Publication date: 2023-09-08

Abstract

The application discloses a control method and device of a light-storage electric heating system, the light-storage electric heating system and a power plant, and belongs to the technical field of energy storage. The control method of the light-storage electric heating system comprises the following steps: obtaining a current electricity cost value, wherein the electricity cost value is obtained based on peak-to-valley electricity price and/or power generation conversion rate; if the current electricity cost value is smaller than a first preset threshold value, a heat supply instruction and a heat storage instruction are generated, and the heat supply instruction is respectively sent to a heat source device of the light-electricity-storage heating system and the heat storage instruction is sent to a heat storage unit of the light-electricity-storage heating system. When the current electricity cost value is obtained, if the current electricity cost value is smaller than the first preset threshold value, the lower electricity price and higher power generation conversion rate are indicated at the moment, the heat source device is enabled to work to generate heat energy as much as possible, the heat storage unit is enabled to store the heat energy as much as possible, the heat storage cost is reduced, the heat energy can be released through the heat storage device, stable heat energy supply is ensured, the utilization rate of energy sources is improved, the energy consumption cost is reduced, and the economic benefit is improved.

Description

Control method and device of light-storage electric heating system, light-storage electric heating system and power plant

Technical Field

The application belongs to the technical field of energy storage, and particularly relates to a control method and device of an optical energy storage electric heating system, the optical energy storage electric heating system and a power plant.

Background

With the rising price of natural gas, new energy sources such as electric energy and heat energy are more and more paid attention to, and the development of new energy sources gradually tends to comprehensive use at present. The heat energy and the electric energy are two main energy sources in life (especially in a household environment), the energy sources are fully and efficiently utilized, and the energy conservation and the emission reduction can be realized while the life quality is improved. In consideration of environmental protection and economy, technologies related to new energy sources are widely applied in life, and at present, photovoltaic power generation technology is often utilized, and electric energy is monitored to ensure that the electric energy can be reasonably and timely distributed to a power supply end and an electric storage device. However, due to the rise of the cogeneration system, if only the monitoring and the distribution of the electric energy are still considered, the overall energy utilization rate is not high, and the economic benefit is low.

Disclosure of Invention

The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the application provides a control method and a device for an optical electricity storage and heating system, the optical electricity storage and heating system and a medium, and the energy utilization rate of the optical electricity storage and heating system is maximized by obtaining the current electricity quantity cost value and comparing the electricity quantity cost value with a first preset threshold value, so that the economic benefit of the optical electricity storage and heating system is improved as much as possible.

In a first aspect, the present application provides a control method of a light-storing electrothermal system, the method comprising:

obtaining a current electricity cost value, wherein the electricity cost value is obtained based on peak-to-valley electricity price and/or power generation conversion rate;

if the current electricity cost value is smaller than a first preset threshold value, a heat supply instruction and a heat storage instruction are generated, and the heat supply instruction is respectively sent to a heat source device of the light-electricity-storage heating system and the heat storage instruction is sent to a heat storage unit of the light-electricity-storage heating system.

According to the control method of the light-storage electric heating system, when the current electric quantity cost value is obtained, if the current electric quantity cost value is smaller than the first preset threshold value, the lower electric price and higher power generation conversion rate are indicated, the heat source device is enabled to work to generate enough heat energy as much as possible, the heat storage unit is enabled to store the heat energy as much as possible, the heat storage cost is reduced, and when the high electric energy requirement period and the high heat energy requirement period are entered later, the heat energy is released through the heat storage device, so that stable heat energy supply is ensured, the utilization rate of energy sources is improved, the energy consumption cost is reduced, and the economic benefit is improved.

According to one embodiment of the present application, the obtaining the current electricity cost value further includes:

If the current electricity cost value is greater than or equal to the first preset threshold value, obtaining current photovoltaic power generation power and current electric load power;

and if the current photovoltaic power generation power is larger than the current electric load power, generating the heat supply instruction, the heat storage instruction and the electric storage instruction, and respectively sending the heat supply instruction to the heat source device, the heat storage instruction to the heat storage unit and the electric storage instruction to the electric storage unit of the photo-electric storage and heating system.

According to an embodiment of the present application, the sending of the heat release instruction to the heat storage unit, the discharging instruction to the electricity storage unit, respectively, includes:

firstly, sending the thermal instruction to the heat storage unit, and then sending the discharge instruction to the electric storage unit; or (b)

And firstly, sending the discharging instruction to the electric storage unit, and then sending the discharging instruction to the heat storage unit.

According to one embodiment of the present application, the obtaining the current photovoltaic power further includes:

if the current photovoltaic power generation power is smaller than or equal to the current electric load power, obtaining the heat energy and the current heat load demand of the current heat storage unit;

and if the heat energy of the current heat storage unit meets the current heat load requirement, generating a heat release instruction and a discharge instruction, and respectively sending the heat release instruction to the heat storage unit and the discharge instruction to the electric storage unit.

According to one embodiment of the application, the obtaining the thermal energy and the current thermal load demand of the thermal storage unit further comprises:

and if the heat energy of the current heat storage unit does not meet the current heat load demand, generating the heat supply instruction and sending the heat supply instruction to the heat source device.

According to one embodiment of the present application, further comprising:

obtaining the heat energy of the current heat storage unit;

and if the heat energy of the current heat storage unit is larger than or equal to a second preset threshold value, generating a conversion instruction, and sending the conversion instruction to a thermoelectric conversion unit of the light-electricity-storage heating system.

According to one embodiment of the application, the heat source device comprises a heat pump and/or a fuel cell.

In a second aspect, the present application provides a control device for a photovoltaic and thermal system, the device comprising:

the power generation system comprises an acquisition module, a power generation conversion module and a power generation conversion module, wherein the acquisition module is used for acquiring a current power cost value, and the power cost value is acquired based on peak-valley power price and/or power generation conversion rate;

and the judging module is used for generating a heat supply instruction and a heat storage instruction when the current electricity cost value is smaller than a first preset threshold value, and respectively sending the heat supply instruction to a heat source device of the light-storage electric heating system and the heat storage instruction to a heat storage unit of the light-storage electric heating system.

According to the control device of the light-storage electric heating system, after the obtaining module obtains the current electric quantity cost value, if the judging module determines that the current electric quantity cost value is smaller than the first preset threshold value, the judging module indicates that the electric price is lower and the power generation conversion rate is higher at the moment, the heat source device is enabled to work to generate enough heat energy as much as possible, the heat storage unit is enabled to store the heat energy as much as possible, the heat storage cost is reduced, the heat energy is released through the heat storage device when the high electric energy requirement period and the high heat energy requirement period are entered later, stable heat energy supply is ensured, the utilization rate of energy sources is improved, the energy consumption cost is reduced, and the economic benefit is improved.

In a third aspect, the present application provides a light-stored electrical heating system comprising a heat source device, a heat storage unit and a control device for a light-stored electrical heating system as described above.

According to the light-storage electric heating system, the control device of the light-storage electric heating system not only reduces the heat storage cost, but also releases heat energy through the heat storage device when entering the high-electric energy demand period and the high-heat energy demand period, thereby ensuring stable heat energy supply, improving the utilization rate of energy sources, reducing the energy consumption cost and improving the economic benefit.

According to an embodiment of the present application, the heat source device is provided in plurality, and the plurality of heat source devices are connected in parallel by the on-off member.

According to one embodiment of the present application, further comprising:

the electric energy monitoring module is connected with the control device of the light-storage electric heating system and is used for obtaining electric energy information;

the heat energy monitoring module is connected with the control device of the light-storage electric heating system and is used for obtaining heat energy information;

and the power conversion device is respectively connected with the electric energy monitoring module, the heat source device and the control device of the light-storage electric heating system.

According to an embodiment of the present application, the power conversion apparatus includes:

the photovoltaic cell unit is used for converting solar energy into electric energy and is respectively connected with the electric energy monitoring module and the heat energy monitoring module;

the inversion unit is connected with the electric energy monitoring module and the photovoltaic cell unit through a direct current bus, and is used for converting direct current generated by the photovoltaic cell unit into alternating current;

and the power grid is connected with the inversion unit through an alternating current bus, and is connected with the electric energy monitoring module and the heat energy monitoring module for conveying and distributing electric energy.

According to one embodiment of the application, the heat source device comprises a heat pump connected to the ac busbar for obtaining ac power from the power conversion device.

According to one embodiment of the application, it further comprises an electric storage unit connected to the dc bus for storing and discharging electric energy obtained from the photovoltaic cell.

According to one embodiment of the present application, further comprising:

and the thermoelectric conversion unit is connected with the heat storage unit and is used for converting heat energy into electric energy.

According to one embodiment of the present application, further comprising:

and the charging unit is connected with the direct current bus and/or the alternating current bus, and is used for obtaining electric energy from the power conversion device and providing electric energy for electric equipment.

In a fourth aspect, the present application provides a virtual power plant for photovoltaic and electric heating, comprising a controller and a plurality of photovoltaic and electric heating systems as described above, wherein the controller is used for scheduling all the photovoltaic and electric heating systems.

According to the light-storage electric heating virtual power plant, through the light-storage electric heating system, the heat storage cost is reduced, and when the light-storage electric heating virtual power plant enters a high electric energy demand period and a high heat energy demand period, heat energy is released through the heat storage device, so that stable heat energy supply is ensured, the utilization rate of energy is improved, the energy consumption cost is reduced, and the economic benefit is improved.

The present application provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a method of controlling a photovoltaic and thermal system as described in the first aspect above.

In a fifth aspect, the present application provides a chip, the chip including a processor and a communication interface, where the communication interface is coupled to the processor, and the processor is configured to execute a program or instructions, to implement the control method of the optical storage electric heating system according to the first aspect.

In a sixth aspect, the present application provides a computer program product comprising a computer program which, when executed by a processor, implements a method of controlling a photovoltaic and thermal system as described in the first aspect above.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Drawings

The foregoing and/or additional aspects and advantages of the application will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic flow chart of a control method of a photovoltaic and thermal system according to an embodiment of the present application;

FIG. 2 is a second flow chart of a control method of the photovoltaic and thermal system according to the embodiment of the application;

fig. 3 is a schematic structural diagram of a control device of a photovoltaic and electric heating system according to an embodiment of the present application;

FIG. 4 is a schematic diagram of a photo-electric heating system according to an embodiment of the present application;

FIG. 5 is a second schematic diagram of a photo-electric heating system according to an embodiment of the present application;

fig. 6 is a third schematic structural diagram of the light-storing and heating system according to the embodiment of the present application.

Detailed Description

The technical solutions of the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which are obtained by a person skilled in the art based on the embodiments of the present application, fall within the scope of protection of the present application.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type, and are not limited to the number of objects, such as the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.

The method for controlling the light-storage electric heating system, the device 400 for controlling the light-storage electric heating system, the light-storage electric heating system and the readable storage medium according to the embodiments of the present application are described in detail below with reference to the accompanying drawings.

The control method of the light-storage electric heating system can be applied to the terminal, and can be specifically executed by hardware or software in the terminal.

The terminal includes, but is not limited to, a portable communication device such as a mobile phone or tablet having a touch sensitive surface (e.g., a touch screen display and/or a touch pad). It should also be appreciated that in some embodiments, the terminal may not be a portable communication device, but rather a desktop computer having a touch-sensitive surface (e.g., a touch screen display and/or a touch pad).

In the following various embodiments, a terminal including a display and a touch sensitive surface is described. However, it should be understood that the terminal may include one or more other physical user interface devices such as a physical keyboard, mouse, and joystick.

The execution main body of the control method of the light-storage electric heating system provided by the embodiment of the application can be an electronic device or a functional module or a functional entity in the electronic device, wherein the electronic device includes, but is not limited to, a mobile phone, a tablet computer, a camera, a wearable device and the like.

The application discloses a control method of a light-storage electric heating system.

As shown in fig. 1, the control method of the light-storage electric heating system includes a step 110 and a step 120.

Step 110, obtaining a current electricity cost value, wherein the electricity cost value is obtained based on peak-to-valley electricity price and/or electricity generation conversion rate.

The peak-to-valley electricity price is also called "time-of-use electricity price", and is an electricity price system for calculating electricity fees according to peak electricity consumption and valley electricity consumption, respectively. Peak electricity consumption generally refers to electricity consumption when electricity supply is tension, such as in daytime, the charging standard is higher; the valley electricity generally refers to electricity consumption when electricity consumption units are less and electricity supply is more sufficient, for example, at night, the charging standard is lower.

If the current power cost value is in the daytime, the current power cost value is obtained based on the peak power price and/or the power generation conversion rate; if the current power cost value is at night, the current power cost value is obtained based on the valley power price and/or the power generation conversion rate. When it is to be noted, the specific time periods defining the daytime and the nighttime may be adjusted according to the actual situation, and the embodiment is not particularly limited.

Note that, the power generation conversion rate=the actual power generation amount/the total energy of the received new energy. Because the photovoltaic power generation technology is mainly utilized by the photovoltaic power storage and heating system in the embodiment, the total energy of the new energy is the total energy of solar energy; of course, the new energy sources include, but are not limited to, water energy, wind energy, geothermal energy, wave energy, ocean current energy, and tidal energy, and the present embodiment is not particularly limited.

It can be understood that, because the peak-to-valley electricity price and the power generation conversion rate are both important factors affecting the economic benefit of the light-storage electric heating system, the electricity cost value can be directly determined by the peak-to-valley electricity price, the power generation conversion rate, or the peak-to-valley electricity price and the power generation conversion rate, which are calculated by distributing the preset weights, the embodiment is not particularly limited, so long as the economic benefit and the utilization rate of the whole energy source can be improved.

And 120, if the current electricity cost value is smaller than a first preset threshold value, generating a heat supply instruction and a heat storage instruction, and respectively sending the heat supply instruction to a heat source device of the light-electricity-storage heating system and the heat storage instruction to a heat storage unit of the light-electricity-storage heating system.

It is understood that the first preset threshold may be used to measure a change in time or a change in quantity. In this embodiment, the electricity cost value is obtained based on the peak-to-valley electricity price, so the first preset threshold is used to measure the change of time, that is, when the current electricity cost value is smaller than the first preset threshold, it means that the electricity price is at the valley value.

As shown in fig. 4 and 5, the optical storage electric heating system may include a heat source device, a heat storage unit, and a heat energy monitoring module, where the heat source device and the heat storage unit are connected, and the heat source device and the heat storage unit are respectively connected to the heat energy monitoring module, and the heat energy monitoring module is used to obtain heat energy information, and the heat energy information includes heat generation amount and heat consumption amount.

In some embodiments, the heat source device includes a heat pump that continuously absorbs heat energy from air and generates heat energy by consuming a small amount of electrical energy to directly supply the heat load or the thermal storage unit, and can function as peak shaving, valley filling, and renewable energy source absorption. In this embodiment, the heat pump is an air source heat pump.

It should be noted that cold energy is energy capable of refrigerating or absorbing heat, and belongs to one type of heat energy, namely, heat energy generated when the heat pump operates in a refrigerating mode.

The heat storage unit stores heat energy when the heat energy supply is sufficient, and releases heat energy when the heat energy supply is insufficient. The heat storage unit comprises a heat storage water tank, a refrigerator, a phase change material device and a heat preservation device. It is understood that the capacity and type of the heat storage unit can be formulated according to the energy scheduling rate and the maximum power of the whole light-storage electric heating system, and the embodiment is not particularly limited.

It is understood that the heat source device and the heat storage unit are used to supply a heat load.

It should be noted that, the heat supply instruction is used to instruct the heat source device to supply heat energy, and the heat energy can be stored in the heat storage unit or directly supplied to the heat load; the heat storage instruction is used for instructing the heat storage unit to store heat energy.

In addition, the heat pump and the heat storage unit are utilized, low-quality heat energy can be fully utilized, heat conversion in the light-storage electric heating system is realized, energy is saved, and high-efficiency energy utilization is realized.

It can be understood that when the current electricity cost value is obtained, if the current electricity cost value is smaller than the first preset threshold value, it is indicated that the electricity price is lower and the power generation conversion rate is higher at this time, by enabling the heat source device to work so as to generate enough heat energy as much as possible, the heat storage unit works so as to store the heat energy as much as possible, thereby not only reducing the heat storage cost, but also ensuring stable heat energy supply, improving the utilization rate of energy sources, reducing the energy consumption cost and improving the economic benefit by releasing the heat energy through the heat storage device when entering the high electricity demand period and the high heat demand period.

In some embodiments, as shown in fig. 4 to 6, the photovoltaic and electric heating system may further include an electric energy monitoring module for obtaining electric energy information including an amount of generated electricity and an amount of used electricity, and an electric power conversion device connected to the electric energy monitoring module, the heat source device, and the heat storage unit, respectively, for providing required electric energy to the electric load, the heat source device, and the heat storage unit.

In this example, the power conversion device includes a photovoltaic cell unit, an inverter unit, and a power grid, where the photovoltaic cell unit is configured to convert solar energy into electric energy; the inversion unit converts direct current generated by the photovoltaic cell unit into alternating current; the power grid is connected with the inversion unit through an alternating current bus and is used for conveying and distributing electric energy.

In order to further improve the economy and the energy utilization rate of the photo-electric heating system, the photo-electric heating system further comprises an electric storage unit, the electric storage unit is connected with the power conversion device, the electric storage unit stores electric energy when the electric energy supply is sufficient, and releases the electric energy when the electric energy supply is insufficient, and the photo-electric heating system can be realized by a storage battery, a super capacitor or a compressed air device and the like.

It is understood that the photovoltaic cell, the electrical storage unit and the electrical grid are used for supplying the electrical load.

In some embodiments, in step 120, if the current electricity cost value is less than the first preset threshold, then the method further includes generating an electricity storage command and sending the electricity storage command to the electricity storage unit.

The storage instruction is used to instruct the storage unit to store electric energy.

It is to be understood that the order of sending the heat storage instruction and the electricity storage instruction may be selected according to actual conditions (such as geography, season, air temperature, electricity price, and heating charge, and other comprehensive factors), and the embodiment is not particularly limited.

In some embodiments, there are three ways to send the thermal storage instructions and the order of the electrical storage instructions:

firstly, the electric power is stored and then the heat is stored,

when the electric energy demand is larger (such as in summer or in a high-temperature environment) or the electric energy economy is higher (the electricity price is in a valley value), firstly sending an electric storage instruction to the electric storage unit, and after waiting for a preset period of time or obtaining the instruction that the electric storage unit is full of electric energy, then sending the heat storage instruction to the heat storage unit;

secondly, firstly accumulating heat and then accumulating electricity,

when the heat energy demand is larger (such as in winter or in northeast China and European areas) or the economy of heat energy is higher, firstly sending a heat storage instruction to the heat storage unit, waiting for a preset period of time, or after obtaining the instruction that the heat storage unit is full, sending the electricity storage instruction to the electricity storage unit;

thirdly, the heat and the electricity are stored at the same time,

corresponding heat storage instructions and power storage instructions are respectively generated to the heat storage unit and the power storage unit at the same time.

It can be understood that when the current electricity cost value is obtained, if the current electricity cost value is smaller than the first preset threshold value, it is indicated that the electricity price is lower and the power generation conversion rate is higher at this time, by enabling the heat source device to work so as to generate enough heat energy as much as possible, the heat storage unit to work so as to store the heat energy as much as possible, and the electricity storage unit to work so as to store the electric energy as much as possible, the heat storage cost is reduced, and when the high electricity demand period and the high heat demand period are entered later, the heat energy is released through the heat storage device, so that stable heat energy supply is ensured, the utilization rate of energy sources is improved, the energy consumption cost is reduced, and the economic benefit is improved.

According to the control method of the light-storage electric heating system, provided by the embodiment of the application, the energy utilization rate of the light-storage electric heating system is maximized by obtaining the current electric quantity cost value and comparing the electric quantity cost value with the first preset threshold value, so that the economic benefit of the light-storage electric heating system is improved as much as possible.

In some embodiments, as shown in fig. 2, step 110 obtains a current charge cost value, followed by steps 130 and 140.

And 130, if the current electricity cost value is greater than or equal to a first preset threshold value, obtaining the current photovoltaic power generation power and the current electric load power.

It can be appreciated that in this embodiment, the electricity cost value is obtained based on the peak-to-valley electricity price, so the first preset threshold is used to measure the change of time, that is, the current electricity cost value is greater than or equal to the first preset threshold, which means that the electricity price is at the peak value.

The photovoltaic power generation power refers to electric energy output by a photovoltaic cell unit.

The electric load power refers to the sum of electric energy required by all electric equipment connected with the optical electricity storage and heating system and all electric equipment in the optical electricity storage and heating system.

And 140, if the current photovoltaic power generation power is greater than the current electric load power, generating a heat supply instruction, a heat storage instruction and an electric storage instruction, and respectively sending the heat supply instruction to the heat source device, the heat storage instruction to the heat storage unit and the electric storage instruction to the electric storage unit of the photo-electric storage system.

It can be understood that the current photovoltaic power generation power is greater than the current electric load power, which means that the electric energy output by the photovoltaic cell unit meets the electric energy requirement required by all heat loads (namely all heat supply equipment connected with the light-storage electric heating system and a heat source device in the light-storage electric heating system).

If the current electricity cost value is greater than or equal to the first preset threshold value, the electricity price is higher and the power generation conversion rate is lower at the moment, and the heat source device is made to work to generate enough heat energy as much as possible, the heat storage unit is made to store the heat energy as much as possible, the electricity storage unit is made to store the electric energy as much as possible, so that the generated electric energy is prevented from being wasted, the heat storage cost and the electricity storage cost are further reduced, and the electric energy and the heat energy are released through the electricity storage device when the high-electricity-demand period and the high-heat-energy-demand period are entered later, so that stable heat energy supply is ensured, the utilization rate of energy sources is improved, the energy use cost is reduced, and the economic benefit is improved.

The sequence of sending the heat storage instruction and the electricity storage instruction may be selected according to actual conditions (such as geography, season, air temperature, electricity price, and heat charge), and the electricity can be stored first and then, or stored simultaneously, and the embodiment is not limited specifically.

In some embodiments, the generating of the heating command, the heat storage command, and the power storage command in step 140 further comprises:

and determining that all electric equipment connected with the light-storage electric heating system and electric energy required by all electric equipment in the light-storage electric heating system come from the photovoltaic cell unit.

If all the electric devices connected with the light-storage electric heating system and the electric energy required by the electric devices in the light-storage electric heating system are not from the photovoltaic cell unit, a heat supply instruction, a heat storage instruction and a power storage instruction are not generated, namely, the heat source device, the heat storage unit and the power storage unit are in a non-working state, so that the energy consumption cost is reduced.

In some embodiments, as shown in fig. 2, the current photovoltaic power generation power is obtained in step 130, followed by steps 150 and 160.

And 150, if the current photovoltaic power generation power is smaller than or equal to the current electric load power, obtaining the heat energy and the current heat load demand of the current heat storage unit.

It can be understood that the current photovoltaic power generation power is equal to the current electric load power, and the electric energy output by the photovoltaic cell unit just meets the electric energy requirements of all electric equipment connected with the photovoltaic power storage and heating system and all electric equipment in the photovoltaic power storage and heating system, so that the heat source device does not work, and the energy consumption cost is reduced.

It can be understood that the current photovoltaic power generation power is smaller than the current electric load power, so that the electric energy output by the photovoltaic cell unit does not meet the electric energy requirements of all electric equipment connected with the photovoltaic power storage and heating system and all electric equipment in the photovoltaic power storage and heating system, and the heat source device does not work, so that the energy consumption cost is reduced.

Step 160, if the heat energy of the current heat storage unit meets the current heat load requirement, generating a heat release instruction and a discharge instruction, and respectively sending the heat release instruction to the heat storage unit and the discharge instruction to the electric storage unit.

The heat release instruction is used for indicating the heat storage unit to release heat energy so as to provide the heat load with the required heat energy, and the discharge instruction is used for indicating the electricity storage unit to release the electricity so as to provide the electric load with the required electricity.

It can be understood that by directly utilizing the heat energy stored in the heat storage unit and the electric energy in the electric storage unit, the stable heat energy and electric energy supply is satisfied, the energy consumption cost is reduced, and the energy supply pressure of the photo-electric heat storage system is relieved.

In some embodiments, as shown in fig. 2, the thermal energy and the current thermal load demand of the current thermal storage unit are obtained in step 150, which is followed by step 170.

Step 170, if the heat energy of the current heat storage unit does not meet the current heat load requirement, generating a heat supply instruction, and sending the heat supply instruction to the heat source device.

It can be understood that if the heat energy of the current heat storage unit does not meet the current heat load requirement, the heat storage unit and the electricity storage unit do not need to work, so that the energy consumption cost is reduced as much as possible.

In some embodiments, step 170 further includes generating a power command and sending the power command to the power grid, the power command being used to instruct the power grid to generate power to provide the remaining required power to meet the steady power supply.

In some embodiments, as shown in fig. 5, the photo-electric heating system further includes a thermoelectric conversion unit connected to the heat storage unit and the electric storage unit, respectively, for converting thermal energy into electric energy, so as to further improve economic efficiency and relieve energy supply pressure. In this embodiment, the thermoelectric conversion unit is a heat source generator.

The control method of the light-storage electric heating system further comprises the following steps:

obtaining the heat energy of the current heat storage unit;

if the heat energy of the current heat storage unit is larger than or equal to a second preset threshold value, generating a conversion instruction, and sending the conversion instruction to a thermoelectric conversion unit of the light-electricity storage and heat generation system.

The conversion instruction is used for instructing the thermoelectric conversion unit to convert thermal energy into electric energy, and then the converted electric energy can be stored in the electric storage unit.

It can be understood that by converting thermal energy into electric energy and storing the electric energy in the electric storage unit, the energy utilization rate can be further improved, the electricity cost can be reduced, and the power supply pressure of the photo-electric storage and heating system can be relieved.

If the heat energy of the current heat storage unit is smaller than the second preset threshold value, a conversion instruction is not generated, and the thermoelectric conversion unit does not work.

It should be noted that, in this embodiment, the second preset threshold is the maximum heat storage amount of the heat storage unit, and in some embodiments, the second preset threshold may be defined as other values, which is not limited in this embodiment.

It may be understood that the conversion instruction may be generated and sent on the premise that the current electricity cost value is smaller than the first preset threshold, or on the premise that the current electricity cost value is greater than or equal to the first preset threshold, and the electricity economy is higher, the embodiment is not particularly limited, as long as the economic benefit can be improved.

In some embodiments, the heat source device comprises a heat pump and/or a fuel cell in order to be able to provide thermal energy.

It will be appreciated that the heat source device may be either a heat pump or a fuel cell or both. In this embodiment, the fuel cell is a solid oxide fuel cell (Solid Oxide Fuel Cell, SOFC) whose exhaust gases can generate heat energy during combustion.

The embodiment of the application also provides a control device 400 of the light-storage electric heating system.

As shown in fig. 3, the control device 400 of the light-storage electric heating system includes an obtaining module 410 and a judging module 420.

The obtaining module 410 is configured to obtain a current electricity cost value, where the electricity cost value is obtained based on a peak-to-valley electricity price and/or a power generation conversion rate.

The judging module 420 is configured to generate a heat supply instruction and a heat storage instruction when the current electricity cost value is smaller than a first preset threshold, and send the heat supply instruction to the heat source device of the optical electric heat storage system and the heat storage instruction to the heat storage unit of the optical electric heat storage system respectively.

According to the control device 400 of the light-storage electric heating system provided by the embodiment of the application, the energy utilization rate of the light-storage electric heating system is maximized by obtaining the current electric quantity cost value and comparing the electric quantity cost value with the first preset threshold value, so that the economic benefit of the light-storage electric heating system is improved as much as possible.

In some embodiments, the obtaining module 410 may be further configured to obtain the current photovoltaic power generation power and the current electrical load power, and the determining module 420 may be further configured to generate a heat supply instruction, a heat storage instruction, and a power storage instruction when the current electrical power generation power is greater than or equal to the first preset threshold, and send the heat supply instruction to the heat source device, the heat storage instruction to the heat storage unit, and the power storage instruction to the power storage unit of the photo-electric heating system, respectively.

It should be noted that, the control device 400 of the photovoltaic and electric heating control system is used to monitor electric energy and heat energy at the same time, and is connected to the power conversion device of the photovoltaic and electric heating control system to obtain electric energy information (such as electric quantity cost value, photovoltaic power generation power, electric load power, etc.) and heat energy information (such as heat load requirement) and send instructions to the power conversion device.

In some embodiments, the control device 400 of the photovoltaic and thermal energy storage control system further includes a monitoring module for monitoring and predicting the generated energy, the used electric energy, the generated heat and the used heat, so that the control device 400 of the photovoltaic and thermal energy storage control system can comprehensively schedule the electric energy and the thermal energy to realize optimal energy utilization.

It should be noted that, the control device 400 of the optical electricity-storage thermal control system realizes data acquisition, transmission, and instruction generation and transmission through a communication protocol/interface.

According to the control device 400 of the photovoltaic and electric heating system provided by the embodiment of the application, if the current electricity cost value is greater than or equal to the first preset threshold, it is indicated that the electricity price is higher and the power generation conversion rate is lower at this time, and considering that the electric energy output by the photovoltaic unit is greater than the required electric energy, the heat source device is enabled to work to generate enough heat energy as much as possible, the heat storage unit is enabled to store the heat energy as much as possible, and the electricity storage unit is enabled to store the electric energy as much as possible, so that the generated electric energy is prevented from being wasted, the heat storage cost and the electricity storage cost are further reduced, and when the high electric energy requirement period and the high heat energy requirement period are entered later, the electric energy is released through the electricity storage device and the heat storage device, so that the stable heat energy supply is ensured, the energy utilization rate is improved, the energy consumption cost is reduced, and the economic benefit is improved.

In some embodiments, the obtaining module 410 is further configured to obtain the thermal energy and the current thermal load requirement of the current thermal storage unit, and the judging module 420 is further configured to generate a heat release instruction and a discharge instruction when the current photovoltaic power is less than or equal to the current electrical load power, and send the heat release instruction to the thermal storage unit and the discharge instruction to the electrical storage unit, respectively.

According to the control device 400 of the light-storage electric heating system provided by the embodiment of the application, the heat energy stored in the heat storage unit and the electric energy stored in the electric storage unit are directly utilized, so that the stable heat energy and electric energy supply is met, the energy consumption cost is reduced, and the energy supply pressure of the light-storage electric heating system is relieved.

In some embodiments, the determining module 420 may be further configured to generate a heating command and send the heating command to the heat source device when the thermal energy of the current thermal storage unit does not meet the current thermal load demand.

According to the control device 400 of the optical energy storage and heating system provided by the embodiment of the application, if the heat energy of the current heat storage unit does not meet the current heat load requirement, the heat storage unit and the electric storage unit do not need to work, so that the energy consumption cost is reduced as much as possible.

In some embodiments, the determining module 420 may be further configured to generate a conversion instruction if the thermal energy of the current thermal storage unit is greater than or equal to the second preset threshold, and send the conversion instruction to the thermoelectric conversion unit of the photovoltaic and thermoelectric system.

According to the control device 400 of the light-storage electric heating system provided by the embodiment of the application, through converting heat energy into electric energy and storing the electric energy into the electric storage unit, the energy utilization rate can be further improved, the electricity consumption cost is reduced, and the power supply pressure of the light-storage electric heating system is relieved.

The control device 400 of the light-electricity-storage heating system in the embodiment of the application may be an electronic device, or may be a component in the electronic device, such as an integrated circuit or a chip. The electronic device may be a terminal, or may be other devices than a terminal. By way of example, the electronic device may be a mobile phone, tablet computer, notebook computer, palm computer, vehicle-mounted electronic device, mobile internet appliance (Mobile Internet Device, MID), augmented reality (augmented reality, AR)/Virtual Reality (VR) device, robot, wearable device, ultra-mobile personal computer, UMPC, netbook or personal digital assistant (personal digital assistant, PDA), etc., but may also be a server, network attached storage (Network Attached Storage, NAS), personal computer (personal computer, PC), television (TV), teller machine or self-service machine, etc., and the embodiments of the present application are not limited in particular.

The control device 400 of the light-storing and heat-generating system according to the embodiment of the present application may be a device having an operating system. The operating system may be a microsoft (Windows) operating system, an Android operating system, an IOS operating system, or other possible operating systems, and the embodiment of the present application is not limited specifically.

The control device 400 of the light-storage electrothermal system provided in the embodiment of the present application can implement each process implemented by the embodiments of the methods of fig. 1 to 2, and in order to avoid repetition, a detailed description is omitted here.

The embodiment of the application also provides a light-storage electric heating system.

As shown in fig. 4, the electricity-storage thermal system includes a heat source device, a heat storage unit, and a control device 400 of any one of the above electricity-storage thermal systems.

The heat source device is connected with the heat storage unit, and the heat source device is used for providing heat energy for the heat load, and the heat storage unit is used for storing or releasing heat energy.

According to the light-electricity-storage heating system provided by the embodiment of the application, the current electricity cost value is obtained through the control device 400 of the light-electricity-storage heating system, and the energy utilization rate of the light-electricity-storage heating system is maximized by comparing the electricity cost value with the first preset threshold value, so that the economic benefit of the light-electricity-storage heating system is improved as much as possible.

In some embodiments, the heat source device is provided in plural, and the plural heat source devices are connected in parallel by the on-off member. It can be understood that the utilization rate of energy sources can be further improved by arranging a plurality of heat source devices, and the heat source devices are connected in parallel by the on-off parts, so that the controllable and schedulable of the whole light-storage electric heating system can be further ensured.

In this embodiment, the on-off member includes, but is not limited to, a switch and a valve.

In some embodiments, the electric light and heat storage system further comprises a thermal energy monitoring module connected to the control device 400 of the electric light and heat storage system for obtaining thermal energy information.

In some embodiments, the light-stored electrical heating system further comprises an electrical energy monitoring module and a power conversion device.

The electric energy monitoring module is connected with the control device 400 of the light-storage electric heating system and is used for obtaining electric energy information; the power conversion device is respectively connected with the electric energy monitoring module, the heat source device and the control device 400 of the light-storage electric heating system, and is used for providing the electric energy required by the electric energy monitoring module, the heat energy monitoring module and the heat storage unit and transmitting data to the control device 400 of the light-storage electric heating system.

In this example, the power conversion device includes a photovoltaic cell unit, an inverter unit and a power grid, where the photovoltaic cell unit is used to convert solar energy into electric energy and is connected with the electric energy monitoring module and the heat energy monitoring module respectively; the inversion unit is connected with the electric energy monitoring module and is used for converting direct current generated by the photovoltaic cell unit into alternating current, and is connected with the photovoltaic cell unit through a direct current bus and is connected with the power grid through an alternating current bus; the power grid is connected with the inversion unit through an alternating current bus and is connected with the electric energy monitoring module and the heat energy monitoring module for conveying and distributing electric energy.

It should be noted that in some embodiments, the inverter unit is a micro inverter, and the photovoltaic cell unit is disposed in an environment with illumination, such as a balcony, so that the whole light-storage electric heating system can be used in a user life. In some embodiments, the inverter unit is a household inverter, so that sunlight of a building or a household villa can be fully utilized.

In some embodiments, the heat source device comprises a heat pump, which continuously absorbs heat from the air by consuming a small amount of electrical energy, and thus can directly supply the heat load or the heat storage unit, and can play the roles of power peak regulation, peak clipping and valley filling, and renewable energy source absorption. In this embodiment, the heat pump is an air source heat pump.

In this embodiment, the heat pump is connected to the ac bus, and is configured to obtain ac from the power conversion device to achieve power supply, and meanwhile, the heat pump may also achieve conversion from low-grade heat energy to high-grade heat energy, so as to improve the energy utilization rate.

In some embodiments, the heat source device further comprises a fuel cell. In this embodiment, the fuel cell is a solid oxide fuel cell (Solid Oxide Fuel Cell, SOFC) whose exhaust gases can generate heat energy during combustion.

In order to further improve the economy and energy utilization rate of the photo-electric heating system, the photo-electric heating system further comprises an electric storage unit, wherein the electric storage unit is connected to the direct current bus and is used for storing and releasing electric energy obtained from the photovoltaic cell unit. The electric storage unit stores electric energy when the electric energy supply is sufficient, and releases electric energy when the electric energy supply is insufficient, and the electric energy can be realized by a storage battery, a super capacitor or a compressed air device.

In some embodiments, as shown in fig. 5, the photo-electric heating system further includes a thermoelectric conversion unit connected to the heat storage unit for converting thermal energy into electrical energy. In this embodiment, the thermoelectric conversion unit is a heat source generator.

In the present embodiment, the thermoelectric conversion unit is connected to the electric storage unit, that is, the electric storage unit is also used to store the electric energy converted by the thermoelectric conversion unit.

It can be understood that when in the refrigeration mode, the heat pump can always generate heat energy, so that the heat storage unit always stores heat, when the heat in the heat storage unit exceeds the maximum capacity of the heat storage unit, the heat source generator is utilized to realize the function of converting redundant heat energy into electric energy, which is equivalent to adding one-stage conversion, and then under the condition of excessive heat, the heat energy is converted into electric energy, so that the energy utilization rate is higher, and meanwhile, the cost is saved.

In some embodiments, as shown in fig. 6, the light-storing electrothermal system further includes a charging unit for obtaining electric energy from the power conversion device and supplying the electric energy to the electric device. In addition, on one hand, the heat generated by the charging unit during operation can be recovered through the heat storage unit, and on the other hand, the problem of icing, frosting and cold starting generated by the charging unit in a severe environment can be solved, and the charging unit can be heated through the heat source device, so that the charging unit can be always in an adaptive working environment.

In some embodiments, the charging unit comprises a dc charging post and/or an ac charging post connected to the dc bus and/or the ac bus for providing dc and ac power, respectively, to the electrical device. It should be noted that, the positions and the number of the dc charging piles and the ac charging piles may be adjusted according to the actual situation, which is not limited in this embodiment.

In some embodiments, the direct current charging pile and the alternating current charging pile can be mobile charging piles, and the convenience of movement of the direct current charging pile and the alternating current charging pile is utilized, so that the heat and electric quantity of the light-storage electric heating system can be utilized more conveniently.

The embodiment of the application also provides a light-storage electric heating virtual power plant, which comprises a controller and a plurality of light-storage electric heating systems, wherein the controller is used for dispatching all the light-storage electric heating systems.

It can be appreciated that the optical-electric-thermal-storage virtual power plant is applicable to environments of multiple regional energy intervals to comprehensively schedule electric energy and heat energy, for example: the mutual scheduling among the neighbors of the village and town areas corresponds to different light-storage electric heating systems, the controller comprehensively considers the control device 400 of each light-storage electric heating system to realize the mutual scheduling of heat energy and electric energy among each light-storage electric heating system, maximize the utilization of the advantages of each area and improve the energy utilization rate.

It can be understood that the light-storage electric heating virtual power plant can directly utilize electric energy and heat energy, and can perform secondary conversion under special scenes so as to ensure the stable operation of an energy system. For example, in peak electricity consumption in summer, because the demand for electric energy is relatively large, heat energy is often converted into electric energy directly, but electric energy can also be provided for a heat source device through electric energy, a heat storage unit stores heat energy, and then when the electric load is excessive and too large, the heat energy is converted into electric energy, namely, secondary conversion is performed.

The embodiment of the application also provides a non-transitory computer readable storage medium, on which a computer program is stored, which when executed by a processor, realizes the processes of the control method embodiment of the light-storage electrothermal system, and can achieve the same technical effects, and in order to avoid repetition, the description is omitted here.

The processor is a processor in the electronic device in the above embodiment. Readable storage media include computer readable storage media such as computer readable memory ROM, random access memory RAM, magnetic or optical disks, and the like.

The embodiment of the application also provides a computer program product, which comprises a computer program, and the computer program realizes the control method of the light-storage electric heating system when being executed by a processor.

The embodiment of the application further provides a chip, the chip comprises a processor and a communication interface, the communication interface is coupled with the processor, the processor is used for running programs or instructions, the processes of the control method embodiment of the optical storage electric heating system can be realized, the same technical effects can be achieved, and the repetition is avoided, and the description is omitted here.

It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, chip systems, or system-on-chip chips, etc.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in part in the form of a computer software product stored on a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method of the embodiments of the present application.

The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are to be protected by the present application.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means 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 application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. A control method of an optical storage electric heating system, comprising:

2. The method of claim 1, wherein the obtaining the current electricity cost value further comprises:

3. The method for controlling a photovoltaic and electric heating system according to claim 2, wherein the obtaining the current photovoltaic power further comprises:

4. A control method of a photo-electric heating system according to claim 3, wherein sending the heat release instruction to the heat storage unit and the discharge instruction to the electricity storage unit respectively includes:

firstly, sending the heat release instruction to the heat storage unit, and then sending the discharge instruction to the electric storage unit; or (b)

5. A method of controlling a photovoltaic and thermal system according to claim 3, wherein said obtaining the current thermal energy and current thermal load demand of said thermal storage unit is followed by:

6. The method for controlling a photovoltaic and thermal system according to claim 1, further comprising:

obtaining the heat energy of the current heat storage unit;

7. A method of controlling a light-stored electrical heating system as claimed in claim 3 wherein the heat source means comprises a heat pump and/or a fuel cell.

8. A control device of an optical storage electric heating system, comprising:

9. A light-storing electrothermal system, comprising:

a heat source device, a heat storage unit, and a control device of the photovoltaic/thermal system according to claim 8.

10. A light and electricity storage system according to claim 9 and wherein said heat source means is provided in plural, plural said heat source means being connected in parallel by an on-off member.

11. A light-harvesting and heat-storage system as recited in claim 9 or claim 10, further comprising:

12. A light and electricity storage system as claimed in claim 11 wherein the power conversion means comprises:

13. A light and electricity storage system according to claim 12 wherein said heat source means comprises a heat pump connected to said ac bus for obtaining ac power from said power conversion means.

14. A light and electricity storage system as claimed in claim 12 and also including an electrical storage unit connected to said dc bus for storing and discharging electrical energy obtained from the photovoltaic cell.

15. A light-harvesting and heat-storage system as recited in claim 9 or claim 10, further comprising:

16. A light and electricity storage system as recited in claim 12, further comprising:

17. A virtual power plant for storing electricity and heat comprising a controller and a plurality of electricity and heat storing systems according to any one of claims 9 to 16, the controller being arranged to schedule all of the electricity and heat storing systems.

18. A non-transitory computer readable storage medium having stored thereon a computer program, which when executed by a processor, implements a method of controlling a light-stored electrical heating system according to any of claims 1-7.