Method, device and energy control device for controlling thermal storage equipment for photovoltaic consumption

Abstract

The present invention discloses a method, device and energy management device for controlling a heat storage device to perform photovoltaic absorption, belonging to the field of photovoltaic absorption technology. The heat storage device is connected to a photovoltaic power generation system and a power grid. The method includes: based on the heat storage of the current concentrated use of the heat storage device, triggering the acquisition of information to be determined; if it is determined according to the information to be determined that the preset time period after the current concentrated use of the heat storage meets the preset first photovoltaic power supply condition, after the current concentrated use of the heat storage ends, the set temperature of the heat storage device is adjusted to a first temperature value, and the first temperature value is less than the default set temperature of the heat storage device; by monitoring the actual temperature of the heat storage medium in the heat storage device and the surplus power of the photovoltaic power generation system, the set temperature is increased from the first temperature value to a second temperature value within the preset time period, and the second temperature value is greater than the default set temperature. The present invention solves the technical problem that the heat storage device is not energy-efficient enough and the absorption rate of photovoltaics is low.

Description

Technical Field

[0001] The present invention belongs to the technical field of photovoltaic absorption, and in particular relates to a method and device for controlling thermal storage equipment to perform photovoltaic absorption, and an energy control device. Background Art

[0002] Storage electric water heaters usually have the following two operating modes. One is the default mode: the water heater stops when it reaches the default set water temperature, and restarts when the water temperature = default set water temperature - hysteresis. The other is the user setting mode: the water heater runs according to the target water temperature and the on / off time set by the user. Since the centralized water use time of storage electric water heaters is mostly in the evening (after dinner) or in the morning (before work), when the storage electric water heater is connected to the photovoltaic power generation system and the power grid, whether it is operated according to the default mode or the user setting, the centralized water use of the storage electric water heater has a low photovoltaic absorption rate and is not energy-efficient. Summary of the invention

[0003] The embodiments of the present invention provide a method, device and energy management device for controlling a thermal storage device to absorb photovoltaic power, which are used to solve the technical problems of insufficient energy conservation of the thermal storage device and low photovoltaic absorption rate when the thermal storage device is connected to a photovoltaic power generation system and a power grid.

[0004] In a first aspect, an embodiment of the present invention provides a method for controlling a heat storage device for photovoltaic absorption, wherein the heat storage device is connected to a photovoltaic power generation system and a power grid, comprising: triggering acquisition of information to be determined based on the heat storage of the current concentrated use of the heat storage device; if it is determined according to the information to be determined that a preset time period after the current concentrated use of the heat storage meets a preset first photovoltaic power supply condition, adjusting the set temperature of the heat storage device to a first temperature value after the current concentrated use of the heat storage ends, the first temperature value being less than a default set temperature of the heat storage device; determining a temperature adjustment timing according to the actual temperature of the heat storage medium in the heat storage device and the surplus power of the photovoltaic power generation system, and at the temperature adjustment timing, increasing the set temperature from the first temperature value to a second temperature value, the second temperature value being greater than the default set temperature.

[0005] In combination with the first aspect, in some embodiments, the information to be determined includes weather information that affects the power generation of the photovoltaic power generation system. After obtaining the information to be determined, it also includes: judging whether the preset time period is sunny based on the weather information, wherein the preset time period is sunny, indicating that the preset time period meets the preset first photovoltaic power supply condition.

[0006] In combination with the first aspect, in some embodiments, after obtaining the information to be determined, it also includes: if it is determined according to the information to be determined that the preset time period after the current concentrated use of heat storage meets the preset second photovoltaic power supply condition, controlling the heat storage device to shut down; monitoring the surplus power of the photovoltaic power generation system; if it is monitored that the surplus power of the photovoltaic power generation system reaches the rated power of the heat storage device, turning on the heat storage device, and adjusting the set temperature of the heat storage device to a third temperature value, so that the heat storage device operates according to the set temperature of the third temperature value, and the third temperature value is greater than the default set temperature.

[0007] In combination with the first aspect, in some embodiments, the information to be determined includes weather information that affects the power generation of the photovoltaic power generation system, and the heat storage remainder of the heat storage device after the current concentrated use of heat storage. The method also includes: judging whether the preset time period is sunny according to the weather information, and judging whether the heat storage remainder after the current concentrated use of heat storage is less than a preset remainder threshold; wherein, if the preset time period is sunny and the heat storage remainder is less than the preset remainder threshold, it indicates that the preset time period meets the preset first photovoltaic power supply condition; if the preset time period is sunny and the heat storage remainder is not less than the preset remainder threshold, it indicates that the preset time period meets the preset second photovoltaic power supply condition.

[0008] In combination with the first aspect, in some embodiments, after determining whether the preset time period is sunny according to the weather information, it also includes: if the preset time period is not sunny, controlling the heat storage device to operate according to the default set temperature after the current concentrated use of heat storage.

[0009] In combination with the first aspect, in some embodiments, the temperature adjustment timing is determined according to the actual temperature of the heat storage medium in the heat storage device and the surplus power of the photovoltaic power generation system, and the set temperature is increased from the first temperature value to the second temperature value at the temperature adjustment timing, and the second temperature value is greater than the default set temperature, including: after the current concentrated use of heat storage, monitoring whether the heat storage medium in the heat storage device has reached the temperature, and monitoring whether the photovoltaic power generation system has surplus power; if there is surplus power in the photovoltaic power generation system before the heat storage medium in the heat storage device reaches the temperature, indicating that it is at the temperature adjustment timing, then the set temperature is increased from the first temperature value to the second temperature before the heat storage medium reaches the temperature; if there is no surplus power in the photovoltaic power generation system before the heat storage medium in the heat storage device reaches the temperature, then after the heat storage medium reaches the temperature, and when the surplus power of the photovoltaic power generation system reaches the rated power of the heat storage device, it indicates that it is at the temperature adjustment timing, the set temperature is increased from the first temperature value to the second temperature value.

[0010] In combination with the first aspect, in some embodiments, before monitoring whether the heat storage medium in the heat storage device has reached the temperature and monitoring whether the photovoltaic power generation system has surplus power, it also includes: determining whether the current concentrated use of heat storage is during the daytime; if the current concentrated use of heat storage is during the daytime, triggering the execution of the steps of monitoring whether the heat storage medium in the heat storage device has reached the temperature and monitoring whether the photovoltaic power generation system has surplus power; if the current concentrated use of heat storage is during the night, it also includes: on the next day after the current concentrated use of heat storage, monitoring whether the surplus power of the photovoltaic power generation system reaches the rated power of the heat storage device; if it is monitored that the surplus power of the photovoltaic power generation system reaches the rated power of the heat storage device, raising the set temperature from the first temperature value to the second temperature value.

[0011] In combination with the first aspect, in some embodiments, after the set temperature is increased from the first temperature value to the second temperature value within the preset time period, it also includes: monitoring whether the surplus power of the photovoltaic power generation system is reduced to no more than zero; if it is monitored that the surplus power of the photovoltaic power generation system is reduced to no more than zero, reducing the set temperature from the second temperature value to the default set temperature, so that the heat storage device operates according to the default set temperature.

[0012] In a second aspect, an embodiment of the present invention provides a device for controlling a heat storage device for photovoltaic consumption, wherein the heat storage device is connected to a photovoltaic power generation system and a power grid, and the device comprises: an information acquisition unit, for triggering the acquisition of information to be determined based on the heat storage of the current concentrated use of the heat storage device; a first temperature adjustment unit, for adjusting the set temperature of the heat storage device to a first temperature value after the current concentrated use of the heat storage ends if it is determined according to the information to be determined that the preset time period after the current concentrated use of the heat storage meets a preset first photovoltaic power supply condition, and the first temperature value is less than the default set temperature of the heat storage device; a second temperature adjustment unit, for determining a temperature adjustment timing according to the actual temperature of the heat storage medium in the heat storage device and the surplus power of the photovoltaic power generation system, and at the temperature adjustment timing, adjusting the set temperature from the first temperature value to a second temperature value, and the second temperature value is greater than the default set temperature.

[0013] In a third aspect, an embodiment of the present invention provides an energy management device, which is connected to at least a heat storage device and a photovoltaic power generation system. The energy management device includes a memory, a processor, and a computer program stored in the memory and used to run on the processor. When the processor executes the program, the method described in any embodiment of the first aspect is implemented.

[0014] One or more technical solutions provided by an embodiment of the present invention: if it is determined based on the acquired information to be determined that the preset time period after the current concentrated use of heat storage meets the preset first photovoltaic power supply condition, then after the current concentrated use of heat storage ends, the set temperature of the heat storage device is first adjusted to a first temperature value less than the default set temperature, thereby reducing the temperature rise space for storing heat in the heat storage device through grid power, and then by monitoring the actual temperature of the heat storage medium in the heat storage device and the surplus power of the photovoltaic power generation system, the set temperature is increased from the first temperature value to a second temperature value greater than the default set temperature within the preset time period, so that the temperature rise space for storing heat using photovoltaic power generation power is the difference between the second temperature value and the first temperature value, thereby increasing the temperature rise space for storing heat using photovoltaic power, and further, the photovoltaic absorption rate of the heat storage device can be improved, saving the consumption of grid power by the heat storage device, and being more energy-efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 The application scenario of the method for controlling a thermal storage device to perform photovoltaic absorption in an embodiment of the present invention is shown;

[0017] Figure 2 A method for controlling a thermal storage device to perform photovoltaic absorption in an embodiment of the present invention is shown;

[0018] Figure 3 The first control logic of the method for controlling the thermal storage device to perform photovoltaic absorption in an embodiment of the present invention is shown;

[0019] Figure 4 The second control logic of the method for controlling the thermal storage device to perform photovoltaic absorption in an embodiment of the present invention is shown;

[0020] Figure 5 The device for controlling the thermal storage device to perform photovoltaic absorption in an embodiment of the present invention is shown;

[0021] Figure 6 A schematic diagram of the structure of an energy management device in an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0024] The embodiment of the present invention provides a method for controlling a thermal storage device to perform photovoltaic absorption, referring to Figure 1 As shown ( Figure 1 The solid line in the middle is the power supply line, and the dotted line is the signal line), which is applied to the scenario where the heat storage device is connected to the photovoltaic power generation system and the power grid at the same time, and both the power grid and the photovoltaic power generation system can supply power to the heat storage device. The method for controlling the heat storage device to perform photovoltaic absorption provided in the embodiment of the present invention can be, but is not limited to, executed by an energy management device to realize the operation control of the heat storage device to improve the photovoltaic absorption rate of the heat storage device. Among them, the energy management device can be independent of the heat storage device, and communicate with the heat storage device and the photovoltaic power generation system using the Modbus protocol, obtain the surplus power of the photovoltaic power generation system through communication with the photovoltaic power generation system, and control the operation of the heat storage device through communication with the heat storage device. The energy management device can also communicate with a user terminal (for example: a mobile phone APP for managing the heat storage device). In an embodiment of the present invention, the heat storage device can be a water storage electric water heater or a device that stores heat with other heat storage media (phase change materials, chemical reactions).

[0025] refer to Figure 2 As shown, the method for controlling the thermal storage device to perform photovoltaic consumption provided by the embodiment of the present invention at least includes the following steps S101 to S103:

[0026] S101: triggering acquisition of information to be determined based on the heat storage of the heat storage device currently used in concentrated manner.

[0027] It is understandable that the information to be determined may include weather information that affects the power generation of the photovoltaic power generation system, that is, weather information at the location where the photovoltaic power generation system is located. The weather forecast can be obtained by the energy management device in an online state, and the weather information at the location where the photovoltaic power generation system is located can be determined based on the weather forecast.

[0028] It can be understood that concentrated use of heat storage refers to the continuous or multiple use of heat storage in the heat storage device within a preset time. The user can submit notification information to the energy management device through the user terminal (mobile phone app) to determine whether the current concentrated use of heat storage has occurred, and determine the end of the current concentrated use of heat storage, so that the energy management device knows that the current concentrated use of heat storage has occurred in the heat storage device and the end of the current concentrated use of heat storage. Other instruments can also be used to detect whether the heat storage usage within the preset time has reached the preset usage threshold. If it has reached, it indicates that the current time is concentrated use of heat storage.

[0029] After obtaining the information to be determined, determine whether the preset time period after the current concentrated use of heat storage meets the preset first photovoltaic power supply condition based on the obtained information to be determined. It should be noted that satisfying the preset first photovoltaic power supply condition means that the preset time period at least satisfies the ability to use the power generated by the photovoltaic power generation system to power the heat storage equipment. The preset time period refers to the daytime period: if the current concentrated use of heat storage is at night, the preset time period refers to the daytime of the next day after the current concentrated use of heat storage; if the current concentrated use of heat storage is during the day, for example: concentrated use of heat storage in the morning, then the preset time period refers to the time period during the daytime of the day, which belongs to the time period after the current concentrated use of heat storage.

[0030] S102: If it is determined according to the information to be determined that the preset time period after the current concentrated use of heat storage meets the preset first photovoltaic power supply condition, the set temperature of the heat storage device is adjusted to a first temperature value after the current concentrated use of heat storage ends, and the first temperature value is less than the default set temperature of the heat storage device.

[0031] It can be understood that if the information to be determined only includes the weather information of the location where the photovoltaic power generation system is located, then it is judged whether the preset time period after the current concentrated use of heat storage is sunny based on the weather information of the location where the photovoltaic power generation system is located; if it is determined according to the weather information that the preset time period is sunny, it indicates that the preset time period meets the preset first photovoltaic power supply condition; if it is determined according to the weather information that the preset time period is not sunny, it indicates that the preset time period does not meet the preset first photovoltaic power supply condition.

[0032] It is understandable that if the heat storage device has the function of monitoring the remaining heat storage, such as some types of water storage electric water heaters have the function of monitoring the remaining hot water, in order to further achieve energy saving, the remaining heat storage after the current concentrated use of heat storage can be combined to control the heat storage device for photovoltaic consumption: To this end, the information to be determined in step S101 needs to include both weather information that affects the power generation of the photovoltaic power generation system (specifically, the weather information at the location of the photovoltaic power generation system) and the remaining heat storage after the current concentrated use of heat storage. According to the weather information, it is determined whether the preset time period after the current concentrated use of heat storage is sunny, and whether the remaining heat storage after the current concentrated use of heat storage is less than the preset remaining threshold; if it is determined according to the weather information that the preset time period after the current concentrated use of heat storage is sunny, and the remaining heat storage after the current concentrated use of heat storage is less than the preset remaining threshold, it indicates that the preset time period after the current concentrated use of heat storage meets the preset first photovoltaic power supply condition; otherwise, it indicates that the preset time period after the current concentrated use of heat storage does not meet the preset first photovoltaic power supply condition.

[0033] Among them, the weather forecast can be obtained through the energy management device in the networked state, and the weather information of the location of the photovoltaic power generation system can be obtained according to the weather forecast. The thermal storage surplus is detected and calculated by the sensor equipment installed in the thermal storage device. For the water storage electric water heater, the thermal storage surplus refers to the mixed water surplus in the water storage electric water heater that reaches the user's water temperature. It can be calculated based on the water storage surplus in the water storage electric water heater that reaches the set temperature. This can be an existing function of the water storage electric water heater and will not be described in detail here.

[0034] It should be noted that the set temperature of the heat storage device refers to the target temperature to be reached after the heat storage medium in the heat storage device is heated. When the actual temperature of the heat storage medium in the heat storage device reaches the set temperature, it will no longer continue to rise and enter the insulation state.

[0035] In step S102, by adjusting the set temperature of the thermal storage device to a first temperature value lower than the default set temperature, the thermal storage device is operated according to the set temperature of the first temperature value, and the heating space for heating the thermal storage medium by supplying power to the thermal storage device through the power grid is reduced, thereby reducing the consumption of power grid electricity in the heating process of the thermal storage medium in the thermal storage device. For example, after the current centralized thermal storage device is finished, the actual temperature of the thermal storage medium is 35°C, and the default set temperature is 55°C. The set temperature is adjusted from 55°C to 45°C, so that after the actual temperature of the thermal storage medium is raised from 35°C to 45°C by consuming the power of the power grid, it will no longer continue to heat up by consuming the power grid.

[0036] It should be understood that the first temperature value can be a default value, and a temperature range that can be set by the user can also be provided, and the upper temperature limit of the temperature range is less than the default set temperature. If the user does not set it by himself, the first temperature value adopts the default value. If the user sets it by himself, the value set by the user shall prevail. For example, the default value of the first temperature value T1 = 45°C (lower than the default set temperature of 55°C). If the user thinks it is too high, he can set it to a lower value, such as 40°C. Then, after the next centralized water use, if the first photovoltaic power supply condition is met, the set temperature will be adjusted to 40°C instead of 45°C.

[0037] In the specific implementation process, since the heat storage device is in a state of being connected to the photovoltaic power generation system and the power grid at the same time, if the photovoltaic power generation system has no surplus power within a period of time after the current concentrated use of heat storage, the power grid will be consumed to increase the actual temperature of the heat storage medium in the heat storage device to the set temperature of the first temperature value. For example, if the current concentrated use of heat storage is at night, then for a long period of time after the current concentrated use of heat storage, there is no surplus power in the photovoltaic power generation system, resulting in that before there is surplus power, the actual temperature of the heat storage medium in the heat storage device has been increased to the set temperature of the first temperature value by consuming the power of the power grid and entering the insulation state.

[0038] After step S102, step S103 is executed: determining the temperature adjustment timing according to the actual temperature of the heat storage medium in the heat storage device and the surplus power of the photovoltaic power generation system, and raising the set temperature from the first temperature value to the second temperature value at the temperature adjustment timing, and the second temperature value is greater than the default set temperature.

[0039] It should be noted that surplus power refers to the power of the photovoltaic power generation system that can be connected to the grid, that is, the remaining power in addition to the power consumed by each load currently connected to the photovoltaic power generation system. In the specific implementation process, the surplus power of the photovoltaic power generation system can be obtained through, but not limited to, communication with the photovoltaic power generation system.

[0040] It can be understood that by increasing the set temperature from the first temperature value to the second temperature value, the thermal storage device can utilize the surplus power of the photovoltaic power generation system to store heat. Step S103 may include the following multiple steps S1031 to S1033:

[0041] S1031: Monitor whether the heat storage medium in the heat storage device has reached the temperature and monitor whether there is surplus power in the photovoltaic power generation system. It should be noted that whether the heat storage medium has reached the temperature refers to whether the actual temperature of the heat storage medium has reached the set temperature, and the temperature will no longer continue to rise after reaching the temperature. Since the set temperature will be adjusted in the actual process, the actual temperature value reached at different times is different, and step S1031, whether the temperature has reached refers to whether the first temperature value has been reached.

[0042] S1032: If it is monitored that the photovoltaic power generation system has surplus power (surplus power>0) before the heat storage medium reaches the temperature, indicating that it is in the temperature adjustment period, the set temperature is increased from the first temperature value to the second temperature before the heat storage medium reaches the temperature.

[0043] S1033: If it is monitored that the photovoltaic power generation system does not have surplus power before the heat storage medium reaches the temperature (surplus power ≤ 0, then after the heat storage medium reaches the temperature and the surplus power of the photovoltaic power generation system reaches (i.e. ≥) the rated power of the heat storage device, it indicates that it is in the temperature adjustment period, and the set temperature of the heat storage device is increased from the first temperature value to the second temperature value.

[0044] It should be understood that if the current centralized use of heat storage is at night, then there will be a long period of time after the current centralized use of heat storage, and the photovoltaic power generation system has no surplus power, resulting in the actual temperature of the heat storage medium in the heat storage device being raised to the set temperature of the first temperature value by consuming the power grid before the next day. Therefore, when the current centralized use of heat storage is at night, the control logic of photovoltaic consumption based on the heat storage device can be simplified. Therefore, before step S1031, it also includes: determining the time period of the current centralized use of heat storage; if the time period of the current centralized use of heat storage is during the daytime, the above steps S1031 to S1033 will be triggered; if the time period of the current centralized use of heat storage is during the night, the above steps S1031 to S1033 will not be executed, but the next day after the current centralized use of heat storage, monitor whether the surplus power of the photovoltaic power generation system reaches the rated power of the heat storage device; if it is monitored that the surplus power of the photovoltaic power generation system reaches the rated power of the heat storage device, the set temperature of the heat storage device is increased from the first temperature value to the second temperature value.

[0045] Of course, after S102, it is also possible to trigger the execution of the above-mentioned control strategies of S1031 to S1033 without distinguishing whether the current concentrated use of thermal storage is during the daytime or the nighttime. If the current concentrated use of thermal storage is during the nighttime, the photovoltaic power generation system will not have surplus power (surplus power ≤ 0) before the thermal storage medium in the thermal storage device reaches the temperature, and will not enter step S1032 at all, but will only enter step S1033.

[0046] It should be understood that if the heat storage device is of a type that has a function of monitoring the remaining heat storage, then, if the preset time period after the current concentrated use of heat storage does not meet the preset first photovoltaic power supply condition, there will be the following two specific situations:

[0047] Case 1: According to weather information, it is determined that the preset period after the current concentrated use of heat storage is not sunny. If it is determined according to weather information that the preset period after the current concentrated use of heat storage is not sunny, the heat storage device is controlled to operate according to the default set temperature after the current concentrated use of heat storage. It should be noted that operating according to the default set temperature means that the actual temperature of the heat storage medium in the heat storage device reaches the default set temperature and enters the insulation state, and no longer continues to rise.

[0048] Case 2: Although it is determined according to the weather information that the preset period after the current concentrated use of heat storage is sunny, the heat storage surplus of the heat storage device after the current concentrated use of heat storage is not less than the preset surplus threshold. For a water storage electric water heater, the heat storage surplus is not less than the preset surplus threshold, indicating that the hot water surplus in the water heater can meet the user's next concentrated water demand. Then, if it is determined according to the weather information that the preset period after the current concentrated use of heat storage is sunny, and the heat storage surplus of the heat storage device after the current concentrated use of heat storage is not less than the preset surplus threshold, indicating that the preset period after the current concentrated use of heat storage meets the preset second photovoltaic power supply condition, the heat storage device is controlled to shut down; in the shutdown state of the heat storage device, the surplus power of the photovoltaic power generation system is monitored; if it is monitored that the surplus power reaches the rated power of the heat storage device, the heat storage device is turned on, and the set temperature of the heat storage device is adjusted to a third temperature value, so that the heat storage device operates according to the set temperature of the third temperature value, and the third temperature value is greater than the default set temperature. In the specific implementation process, the third temperature value and the second temperature value can be the same temperature value.

[0049] It is understandable that as the weather changes or time passes, the surplus power of the photovoltaic power generation system will decrease or even no longer have surplus power. In order to achieve energy saving in this case, after the set temperature is increased from the first temperature value to the second temperature value within the preset period, it also includes: monitoring whether the surplus power of the photovoltaic power generation system is reduced to not more than zero; if the surplus power of the photovoltaic power generation system is reduced to not more than zero, the set temperature is reduced from the second temperature value to the default set temperature, so that the thermal storage device operates according to the default set temperature again. Thereby, the temperature rise space for heat storage through grid electricity is reduced to achieve further energy saving.

[0050] refer to Figure 3As shown, in order to facilitate those skilled in the art to understand the method for controlling the thermal storage device to perform photovoltaic absorption provided by the embodiment of the present invention, a storage-type electric water heater is taken as an example to describe the first control logic of the method for controlling the thermal storage device to perform photovoltaic absorption:

[0051] A1. Determine the time period during which the hot water in the storage electric water heater is currently used in a concentrated manner, and select an operation control strategy for the storage electric water heater according to the time period: if it is during the daytime period (specifically, it can be during the morning period during the daytime period), execute the operation control strategy of steps A2 to A6 below; if it is during the evening period, execute the operation control strategy of steps A7 to A9 below:

[0052] A2. Determine whether it is sunny on that day. If it is not sunny on that day, run according to the default set temperature (subsequently marked as T0). If it is sunny on that day, execute the following steps A3 to A6:

[0053] A3. After the current concentrated water use ends, adjust the set temperature of the storage electric water heater to T0-△T1.

[0054] A4. Monitor whether the actual water temperature in the storage electric water heater reaches the set temperature and whether the surplus power of the photovoltaic power generation system is greater than zero.

[0055] A5. If the surplus power is greater than zero before the actual water temperature reaches the set temperature, the set temperature of the storage electric water heater is adjusted from T0-△T1 to T0+△T2 before the actual water temperature reaches the set temperature.

[0056] A6. If the surplus power of the photovoltaic power generation system is continuously not greater than zero before the actual water temperature reaches the set temperature, then after the actual water temperature reaches the set temperature, monitor whether the surplus power of the photovoltaic power generation system is greater than the rated power of the storage electric water heater. If it is monitored that the surplus power of the photovoltaic power generation system is greater than the rated power of the storage electric water heater, adjust the set temperature of the storage electric water heater from T0-△T1 to T0+△T2.

[0057] A7. Determine whether the next day is sunny. If the next day is not sunny, the set temperature is the default set temperature T0. If the next day is sunny, perform the following steps A8 to A9:

[0058] A8. After the current concentrated water use ends, adjust the set temperature of the storage electric water heater to T0-△T1.

[0059] A9. On the next day after the current concentrated water use ends, monitor whether the surplus power of the photovoltaic power generation system is greater than the rated power of the storage electric water heater. If it is monitored that the surplus power of the photovoltaic power generation system is greater than the rated power of the storage electric water heater, adjust the set temperature of the storage electric water heater from T0-△T1 to T0+△T2.

[0060] It should be noted that, if the default set temperature T0 = 55°C, △T1 = 10°C, △T2 = 10°C, then the set temperature will be adjusted to 45°C after the current concentrated water use ends. When the surplus power of the photovoltaic power generation system can be used, the set temperature will be adjusted from 45°C to 65°C. That is, there is a temperature rise space of 65-45 = 20°C for heating using the surplus power of the photovoltaic power generation system, which is twice the 10°C temperature rise space for heating from the default set temperature of 55°C to 65°C. Therefore, the utilization of photovoltaic power generation is greater, which improves the power saving benefit.

[0061] refer to Figure 4 As shown, in order to facilitate those skilled in the art to understand the method for controlling the thermal storage device to perform photovoltaic absorption provided by the embodiment of the present invention, a second control logic is described by taking a water storage electric water heater as an example:

[0062] B1. Determine the time period during which the hot water in the storage electric water heater is currently used, and select the operation control strategy for the storage electric water heater according to the time period: if it is during the daytime (specifically, it can be the morning time period during the daytime), execute the following step B2; if it is during the evening time, execute the following step B2':

[0063] B2, determine whether it is sunny on that day, if it is not sunny on that day, operate according to the set temperature is the default set temperature (subsequently marked as T0), if it is sunny on that day, execute step B3, determine whether the hot water remaining in the storage electric water heater is less than the preset remaining threshold, if it is less than the preset remaining threshold, execute the following steps B4 to B7, if it is not less than the preset remaining threshold, it indicates that the hot water remaining can meet the next centralized water demand, then execute step B8:

[0064] B4. After the current concentrated water use ends, adjust the set temperature of the storage electric water heater to T0-△T1, and continue to keep the storage electric water heater in operation.

[0065] B5. When the storage water heater is in operation, monitor whether the actual water temperature in the storage electric water heater reaches the set temperature, and whether the surplus power of the photovoltaic power generation system is greater than zero.

[0066] B6. If the surplus power of the photovoltaic power generation system is greater than zero before the actual water temperature in the storage-type electric water heater reaches the set temperature, the set temperature of the storage-type electric water heater is adjusted from T0-△T1 to T0+△T2 before the actual water temperature reaches the set temperature.

[0067] B7. If the surplus power of the photovoltaic power generation system continues to be less than zero before the actual water temperature in the storage-type electric water heater reaches the set temperature, then after the actual water temperature reaches the set temperature, monitor whether the surplus power of the photovoltaic power generation system is greater than or equal to the rated power of the storage-type electric water heater. If it is monitored that the surplus power of the photovoltaic power generation system is greater than or equal to the rated power of the storage-type electric water heater, adjust the set temperature of the storage-type electric water heater from T0-△T1 to T0+△T2.

[0068] B8: After the current centralized water use is completed, the storage water heater is turned off, and when the storage water heater is in the off state, the surplus power of the photovoltaic power generation system is monitored to see whether it is greater than or equal to the rated power of the storage water heater;

[0069] B9: When it is monitored that the surplus power of the photovoltaic power generation system is greater than or equal to the rated power of the storage electric water heater, the storage electric water heater is turned on, and the set temperature of the storage electric water heater is adjusted to T0+△T2, so that the storage water heater after being turned on operates according to the set temperature of T0+△T2.

[0070] B2': Determine whether the next day is sunny. If the next day is not sunny, the set temperature is the default set temperature T0. If the next day is sunny, execute B3': Determine whether the remaining hot water in the storage electric water heater is less than the preset remaining threshold. If it is less than the preset remaining threshold, execute the following steps B4'~B5'. If it is not less than the preset remaining threshold, it indicates that the remaining hot water can meet the next centralized water demand, then execute step B6':

[0071] B4', after the current concentrated water use ends, the set temperature of the water storage electric water heater is adjusted to T0-△T1, and the water storage water heater is kept in operation so that the actual water temperature can reach T0-△T1 by the next day through the power of the grid;

[0072] B5'. On the next day after the current concentrated water use ends, monitor whether the surplus power of the photovoltaic power generation system is greater than or equal to the rated power of the storage electric water heater under the operation state of the storage electric water heater. If it is monitored that the surplus power of the photovoltaic power generation system is greater than or equal to the rated power of the storage electric water heater, adjust the set temperature of the storage electric water heater from T0-△T1 to T0+△T2, so that on the next day after the current concentrated water use ends, the actual water temperature can be increased from T0-△T1 to T0+△T2 through photovoltaic power generation.

[0073] B6': After the current concentrated water use ends, the storage water heater is turned off, and the surplus power of the photovoltaic power generation system is monitored from the next day to see if it is greater than or equal to the rated power of the storage electric water heater; when it is monitored that the surplus power of the photovoltaic power generation system is greater than or equal to the rated power of the storage electric water heater, the storage water heater is turned on, and the set temperature of the storage electric water heater is adjusted to T0+△T2, so that the storage water heater after being turned on operates according to the set temperature of T0+△T2.

[0074] In order to facilitate those skilled in the art to understand the method for controlling the thermal storage device to perform photovoltaic absorption provided by the embodiment of the present invention, a third control logic is described by taking a water storage electric water heater as an example:

[0075] C1: After the current centralized water use, determine whether the daytime period after the current centralized water use is sunny. If the daytime period after the current centralized water use is not sunny, run according to the set temperature, which is the default set temperature. If it is sunny, directly execute the following steps C2 to C4, or if the daytime period after the current centralized water use is sunny, continue to determine whether the hot water surplus after the current centralized water use is less than the preset surplus threshold. If it is less than the preset surplus threshold, the following steps C2 to C4 are triggered. If it is not less than the preset surplus threshold, it indicates that the hot water surplus can meet the next centralized water use demand, and then trigger the execution of step C5:

[0076] C2. After the current concentrated water use ends, adjust the set temperature of the storage electric water heater to T0-△T1, and continue to keep the storage electric water heater in operation; when the storage electric water heater is in operation, monitor whether the actual water temperature in the storage electric water heater reaches the set temperature, and whether the surplus power of the photovoltaic power generation system is greater than zero.

[0077] C3. If it is monitored that the surplus power of the photovoltaic power generation system is greater than zero before the actual water temperature in the storage-type electric water heater reaches the set temperature, the set temperature of the storage-type electric water heater is adjusted from T0-△T1 to T0+△T2 before the actual water temperature reaches the set temperature.

[0078] C4. If it is monitored that the surplus power of the photovoltaic power generation system is continuously not greater than zero before the actual water temperature in the storage-type electric water heater reaches the set temperature, then after the actual water temperature reaches the set temperature, monitor whether the surplus power of the photovoltaic power generation system is greater than or equal to the rated power of the storage-type electric water heater. If it is monitored that the surplus power of the photovoltaic power generation system is greater than or equal to the rated power of the storage-type electric water heater, adjust the set temperature of the storage-type electric water heater from T0-△T1 to T0+△T2.

[0079] C5: After the current concentrated water use ends, the storage water heater is turned off, and when the storage water heater is in the off state, the surplus power of the photovoltaic power generation system is monitored to see whether it is greater than or equal to the rated power of the storage electric water heater; when it is monitored that the surplus power of the photovoltaic power generation system is greater than or equal to the rated power of the storage electric water heater, the storage water heater is turned on, and the set temperature of the storage electric water heater is adjusted to T0+△T2, so that the storage water heater after being turned on operates according to the set temperature of T0+△T2.

[0080] Based on the same inventive concept, an embodiment of the present invention provides a device for controlling a heat storage device to perform photovoltaic absorption, wherein the heat storage device is connected to a photovoltaic power generation system and a power grid, and Figure 5 As shown, the device for controlling the heat storage device to perform photovoltaic absorption includes: an information acquisition unit 501, which is used to trigger the acquisition of information to be determined based on the heat storage of the current concentrated use of the heat storage device; a first temperature adjustment unit 502, which is used to adjust the set temperature of the heat storage device to a first temperature value after the current concentrated use of the heat storage ends if it is determined according to the information to be determined that the preset time period after the current concentrated use of the heat storage meets the preset first photovoltaic power supply condition, and the first temperature value is less than the default set temperature of the heat storage device; a second temperature adjustment unit 503, which is used to determine the temperature adjustment timing according to the actual temperature of the heat storage medium in the heat storage device and the surplus power of the photovoltaic power generation system, and at the temperature adjustment timing, increase the set temperature from the first temperature value to the second temperature value, and the second temperature value is greater than the default set temperature.

[0081] It is understandable that a weather judgment unit may be further included, for judging whether the preset time period is sunny according to the weather information, wherein the preset time period is sunny, indicating that the preset time period meets the preset first photovoltaic power supply condition.

[0082] It can be understood that it can also include a shutdown control unit, which is used to: if it is determined according to the information to be judged that the preset time period after the current concentrated use of heat storage meets the preset second photovoltaic power supply condition, control the thermal storage device to shut down; a surplus power monitoring unit, which is used to monitor the surplus power of the photovoltaic power generation system; and a start control unit, which is used to start the thermal storage device if it is monitored that the surplus power of the photovoltaic power generation system reaches the rated power of the thermal storage device, and adjust the set temperature of the thermal storage device to a third temperature value, so that the thermal storage device operates according to the set temperature of the third temperature value, and the third temperature value is greater than the default set temperature.

[0083] It can be understood that the information to be judged includes weather information that affects the power generation of the photovoltaic power generation system, and the heat storage remainder of the heat storage device after the current concentrated use of heat storage, and can also include: a weather judgment unit, used to judge whether the preset time period is sunny according to the weather information; a remainder judgment unit, used to judge whether the heat storage remainder after the current concentrated use of heat storage is less than the preset remainder threshold; wherein, if the preset time period is sunny and the heat storage remainder is less than the preset remainder threshold, it indicates that the preset time period meets the preset first photovoltaic power supply condition; if the preset time period is sunny and the heat storage remainder is not less than the preset remainder threshold, it indicates that the preset time period meets the preset second photovoltaic power supply condition.

[0084] It is understandable that a default mode operation control unit may also be included, which is used to control the heat storage device to operate according to the default set temperature after the current concentrated use of heat storage if the preset time period is not sunny.

[0085] It can be understood that the second temperature control unit 503 is specifically used to monitor whether the heat storage medium in the heat storage device has reached the temperature after the current concentrated use of heat storage, and to monitor whether the photovoltaic power generation system has surplus power; if the photovoltaic power generation system has surplus power before the heat storage medium in the heat storage device reaches the temperature, indicating that it is in the temperature control period, then the set temperature is increased from the first temperature value to the second temperature before the heat storage medium reaches the temperature; if the photovoltaic power generation system does not have surplus power before the heat storage medium in the heat storage device reaches the temperature, then after the heat storage medium reaches the temperature, and when the surplus power of the photovoltaic power generation system reaches the rated power of the heat storage device, it indicates that it is in the temperature control period, and the set temperature is increased from the first temperature value to the second temperature value.

[0086] It can be understood that it can also include: a time period determination unit, used to determine whether the current concentrated use of heat storage is during the daytime; a trigger unit, used to trigger the execution of the steps of monitoring whether the heat storage medium in the heat storage device has reached the temperature, and monitoring whether there is surplus power in the photovoltaic power generation system if the current concentrated use of heat storage is during the daytime; a third temperature adjustment unit, used to, if the current concentrated use of heat storage is during the night time, also include: on the next day after the current concentrated use of heat storage, monitoring whether the surplus power of the photovoltaic power generation system reaches the rated power of the heat storage device, if it is monitored that the surplus power of the photovoltaic power generation system reaches the rated power of the heat storage device, the set temperature is increased from the first temperature value to the second temperature value.

[0087] It is understandable that it may also include: a default mode recovery unit, used to monitor whether the surplus power of the photovoltaic power generation system is reduced to not greater than zero; if the surplus power of the photovoltaic power generation system is reduced to not greater than zero, the set temperature is adjusted from the second temperature value to the default set temperature, so that the heat storage device operates according to the default set temperature again.

[0088] The specific functions of each functional unit in the above-mentioned device have been described in detail in the photovoltaic abandoned light power processing embodiment provided in the embodiment of the present invention, and will not be elaborated here.

[0089] Based on the same inventive concept, an embodiment of the present invention further provides an energy management device, which is connected to at least a thermal storage device and a photovoltaic power generation system. Figure 6 As shown, the energy management device includes a memory 604, a processor 602, and a computer program stored in the memory 604 and executable on the processor 602. The processor 602 executes the program to implement the steps described in any implementation of the method for controlling the thermal storage device to perform photovoltaic absorption.

[0090] Among them, Figure 6 In the embodiment of the present invention, a bus architecture (represented by bus 600) is shown, which may include any number of interconnected buses and bridges, and bus 600 links various circuits including one or more processors represented by processor 602 and memory represented by memory 604. Bus 600 may also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. Bus interface 606 provides an interface between bus 600 and receiver 601 and transmitter 603. Receiver 601 and transmitter 603 may be the same element, namely a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 602 is responsible for managing bus 600 and general processing, while memory 604 may be used to store data used by processor 602 when performing operations.

[0091] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1A device that has the functions specified in one or more boxes.

[0092] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0093] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0094] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0095] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

[0096] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A method for controlling a thermal storage device to carry out photovoltaic consumption, wherein the thermal storage device is connected to a photovoltaic power generation system and a power grid, characterized in that: The method comprises: Based on the current concentrated use of the heat storage of the heat storage device, triggering the acquisition of information to be determined; If it is determined according to the information to be determined that the preset time period after the current concentrated use of heat storage meets the preset first photovoltaic power supply condition, the set temperature of the heat storage device is adjusted to a first temperature value after the current concentrated use of heat storage ends, and the first temperature value is less than the default set temperature of the heat storage device; otherwise, the heat storage device is controlled to operate according to the default set temperature after the current concentrated use of heat storage; The temperature adjustment timing is determined according to the actual temperature of the heat storage medium in the heat storage device and the surplus power of the photovoltaic power generation system, and the set temperature is increased from the first temperature value to the second temperature value at the temperature adjustment timing, including: if there is no surplus power in the photovoltaic power generation system before the heat storage medium in the heat storage device reaches the temperature, then after the heat storage medium reaches the temperature and the surplus power of the photovoltaic power generation system reaches the rated power of the heat storage device, it is characterized that it is at the temperature adjustment timing, and the set temperature is increased from the first temperature value to the second temperature value, and the second temperature value is greater than the default set temperature.

2. The method according to claim 1, characterized in that The information to be determined includes weather information that affects the power generation of the photovoltaic power generation system. After obtaining the information to be determined, the method further includes: It is determined whether the preset time period is sunny according to the weather information, wherein the preset time period is sunny, indicating that the preset time period meets a preset first photovoltaic power supply condition.

3. The method according to claim 1, characterized in that After obtaining the information to be determined, the method further includes: If it is determined according to the information to be determined that the preset time period after the current concentrated use of thermal storage meets the preset second photovoltaic power supply condition, the thermal storage device is controlled to shut down; Monitoring the surplus power of the photovoltaic power generation system; If it is monitored that the surplus power of the photovoltaic power generation system reaches the rated power of the heat storage device, the heat storage device is turned on and the set temperature of the heat storage device is adjusted to a third temperature value so that the heat storage device operates at the set temperature of the third temperature value, and the third temperature value is greater than the default set temperature.

4. The method according to claim 3, characterized in that The information to be determined includes weather information that affects the power generation of the photovoltaic power generation system, and the remaining heat storage capacity of the heat storage device after the current concentrated use of heat storage. The method further includes: Determining whether the preset time period is sunny according to the weather information, and determining whether the heat storage surplus after the current concentrated use of heat storage is less than a preset surplus threshold; Among them, if the preset time period is sunny and the heat storage margin is less than the preset margin threshold, it indicates that the preset time period meets the preset first photovoltaic power supply condition; if the preset time period is sunny and the heat storage margin is not less than the preset margin threshold, it indicates that the preset time period meets the preset second photovoltaic power supply condition.

5. The method according to claim 2 or 4, characterized in that After determining whether the preset time period is sunny according to the weather information, the method further includes: If the preset time period is not a sunny day, the heat storage device is controlled to operate according to the default set temperature after the current concentrated use of heat storage.

6. The method according to claim 1, characterized in that The step of determining the temperature adjustment timing according to the actual temperature of the heat storage medium in the heat storage device and the surplus power of the photovoltaic power generation system, and raising the set temperature from the first temperature value to the second temperature value at the temperature adjustment timing, further includes: After the current concentrated use of heat storage, monitoring whether the heat storage medium in the heat storage device has reached the temperature, and monitoring whether there is surplus power in the photovoltaic power generation system; If the photovoltaic power generation system has surplus power before the heat storage medium in the heat storage device reaches the temperature, indicating that it is in the temperature adjustment period, the set temperature is increased from the first temperature value to the second temperature before the heat storage medium reaches the temperature.

7. The method according to claim 6, characterized in that Before monitoring whether the heat storage medium in the heat storage device has reached the temperature and monitoring whether there is surplus power in the photovoltaic power generation system, it also includes: determining whether the current concentrated use of heat storage is during the daytime; If the current concentrated use of heat storage is during the daytime, triggering the steps of monitoring whether the heat storage medium in the heat storage device has reached the temperature, and monitoring whether there is surplus power in the photovoltaic power generation system; If the current concentrated use of heat storage is during the evening period, the method further includes: on the next day after the current concentrated use of heat storage, monitoring whether the surplus power of the photovoltaic power generation system reaches the rated power of the heat storage device; if it is monitored that the surplus power of the photovoltaic power generation system reaches the rated power of the heat storage device, raising the set temperature from the first temperature value to the second temperature value.

8. The method according to claim 1, characterized in that After the set temperature is increased from the first temperature value to the second temperature value within the preset time period, the method further includes: Monitoring whether the surplus power of the photovoltaic power generation system is reduced to no greater than zero; If the surplus power of the photovoltaic power generation system decreases to not greater than zero, the set temperature is adjusted down from the second temperature value to the default set temperature so that the thermal storage device operates according to the default set temperature again.

9. A device for controlling a heat storage device to perform photovoltaic consumption, wherein the heat storage device is connected to a photovoltaic power generation system and a power grid, characterized in that: The device comprises: An information acquisition unit, configured to trigger acquisition of information to be determined based on the current concentrated use of the heat storage of the heat storage device; a first temperature adjustment unit, configured to adjust the set temperature of the heat storage device to a first temperature value after the current concentrated use of heat storage ends if it is determined according to the information to be determined that the preset time period after the current concentrated use of heat storage meets the preset first photovoltaic power supply condition, and the first temperature value is less than the default set temperature of the heat storage device; otherwise, control the heat storage device to operate according to the default set temperature after the current concentrated use of heat storage; A second temperature adjustment unit is used to determine a temperature adjustment timing according to an actual temperature of the heat storage medium in the heat storage device and a surplus power of the photovoltaic power generation system, and to increase the set temperature from the first temperature value to a second temperature value at the temperature adjustment timing, wherein the second temperature value is greater than the default set temperature, including: if there is no surplus power in the photovoltaic power generation system before the heat storage medium in the heat storage device reaches the temperature, then after the heat storage medium reaches the temperature and the surplus power of the photovoltaic power generation system reaches the rated power of the heat storage device, indicating that it is at the temperature adjustment timing, the set temperature is increased from the first temperature value to the second temperature value.

10. An energy management device, connected to at least a thermal storage device and a photovoltaic power generation system, characterized in that: The energy management device includes a memory, a processor, and a computer program stored in the memory and used to run on the processor. When the processor executes the program, the method described in any one of claims 1 to 8 is implemented.

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