CN109818353A - A kind of method for controlling power supply and power supply control apparatus - Google Patents
A kind of method for controlling power supply and power supply control apparatus Download PDFInfo
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Abstract
The application provides a kind of method for controlling power supply and power supply control apparatus, this method comprises: judging whether current power is normal electricity consumption；In the case where current power is normal electricity consumption, the difference of photovoltaic power generation electric energy increment and electric appliance consumption electric energy increment is obtained, and is powered according to the difference for electric appliance；In the case where current power is abnormal electricity consumption, control energy-storage battery is powered for electric appliance.In this way, can be powered in the case where current power is normal electricity consumption according to photovoltaic power generation electric energy increment and the difference of electric appliance consumption electric energy increment for electric appliance；In the case where current power is abnormal electricity consumption, it can control energy-storage battery and be powered for electric appliance.Household electricity expense can be reduced.
Description
Technical Field
The present application relates to the field of electrical engineering technologies, and in particular, to a power supply control method and a power supply control device.
Background
Along with the improvement of living standard and housing conditions, the smart home is produced. The intelligent home integrates system, structure, service and management into a whole, and ensures a high-efficiency, comfortable, safe, convenient and environment-friendly living environment. The intelligent household energy efficiency management system in the intelligent household can detect the running state and the electric energy consumption condition of household appliances based on a household communication network, and can conveniently and intelligently remotely control the electric appliances. Along with the increase of the quantity of household appliances and the total power consumption of residents, the intelligent household energy efficiency management system can reasonably arrange the working time of the household appliances. In the peak period of power utilization, the electric energy price of the power grid is higher; in the low ebb period of the power consumption, the price of the electric energy of the power grid is lower. The use time of the home appliances is mostly concentrated, such as afternoon and evening. And the household appliances are basically used when the power price of the electric energy of the power grid is the peak price. Therefore, in the related art, the household electricity cost is high.
Disclosure of Invention
The application provides a power supply control method and a power supply control device, which aim to solve the problem that the household electricity consumption cost is high in the related technology.
In one aspect, the present application provides a power supply control method, including:
judging whether the current power utilization is normal power utilization;
under the condition that the current power consumption is normal power consumption, acquiring a difference value between the photovoltaic power generation electric energy increment and the electric energy consumption increment of the electric appliance, and supplying power to the electric appliance according to the difference value;
and under the condition that the current electricity utilization is abnormal electricity utilization, controlling the energy storage battery to supply power to the electric appliance.
Optionally, the supplying power to the electrical appliance according to the difference includes:
determining whether the electric quantity stored by the energy storage battery is greater than or equal to a preset second threshold value or not under the condition that the difference value is greater than a preset first threshold value;
under the condition that the electric quantity stored by the energy storage battery is greater than or equal to the preset second threshold value, controlling photovoltaic power generation equipment to supply power to the electrical appliance;
when the electric quantity stored by the energy storage battery is smaller than the preset second threshold value and the current power grid electric energy price is higher than the photovoltaic electric energy price, controlling the photovoltaic power generation equipment to supply power to the electric appliance;
and under the conditions that the electric quantity stored by the energy storage battery is smaller than the preset second threshold value and the current electric power price of the power grid is lower than the electric power price of the photovoltaic power, storing the photovoltaic power generation electric energy into the energy storage battery and controlling the power grid to supply power to the electric appliance.
Optionally, the supplying power to the electrical appliance according to the difference includes:
under the condition that the difference value is smaller than a preset first threshold value and the electric quantity stored by the energy storage battery is lower than a preset third threshold value, controlling a power grid to supply power to the electric appliance;
when the difference value is smaller than the preset first threshold value, the electric quantity stored by the energy storage battery is larger than or equal to a preset fourth threshold value, and the electric power price of the power grid is the peak price, controlling the energy storage battery to supply power to the electric appliance;
and controlling the power grid to supply power to the electrical appliance under the conditions that the difference value is smaller than the preset first threshold value, the electric quantity stored by the energy storage battery is larger than or equal to the preset fourth threshold value, and the electric power price of the power grid is not the peak price.
Optionally, the supplying power to the electrical appliance according to the difference includes:
and under the condition that the difference value is equal to a preset first threshold value, controlling the photovoltaic power generation equipment to supply power to the electrical appliance.
Optionally, the controlling the energy storage battery to supply power to the electrical appliance includes:
judging whether the power grid is in a power supply stopping state;
under the condition that the power grid is in a power supply stopping state, controlling the energy storage battery to supply power to the electrical appliance;
under the condition that the power grid is not in a power supply stopping state, judging whether the voltage of the power grid is smaller than or equal to a preset fifth threshold value or not;
under the condition that the power grid voltage is smaller than or equal to the preset fifth threshold, controlling the energy storage battery to supply power to the electrical appliance;
under the condition that the power grid voltage is larger than the preset fifth threshold, judging whether the power grid frequency is in a preset range;
and under the condition that the power grid frequency is out of the preset range, controlling the energy storage battery to supply power to the electric appliance.
On the other hand, the present application also provides a power supply control device, including:
the judging module is used for judging whether the current power utilization is normal power utilization;
the first power supply module is used for acquiring a difference value between the photovoltaic power generation electric energy increment and the electric energy consumption increment of the electric appliance under the condition that the current power consumption is normal power consumption, and supplying power to the electric appliance according to the difference value;
and the second power supply module is used for controlling the energy storage battery to supply power to the electric appliance under the condition that the current power utilization is abnormal power utilization.
Optionally, the first power supply module includes:
the determining submodule is used for determining whether the electric quantity stored by the energy storage battery is greater than or equal to a preset second threshold value or not under the condition that the difference value is greater than a preset first threshold value;
the first control submodule is used for controlling the photovoltaic power generation equipment to supply power to the electrical appliance under the condition that the electric quantity stored by the energy storage battery is greater than or equal to the preset second threshold value;
the second control submodule is used for controlling the photovoltaic power generation equipment to supply power to the electrical appliance under the condition that the electric quantity stored by the energy storage battery is smaller than the preset second threshold value and the current power grid electric energy price is higher than the photovoltaic electric energy price;
and the third control sub-module is used for storing the photovoltaic power generation electric energy into the energy storage battery and controlling the power grid to supply power to the electric appliance under the condition that the electric quantity stored by the energy storage battery is smaller than the preset second threshold value and the current electric power price of the power grid is lower than the electric power price of the photovoltaic power.
Optionally, the first power supply module further includes:
the fourth control submodule is used for controlling a power grid to supply power to the electrical appliance under the condition that the difference value is smaller than a preset first threshold value and the electric quantity stored by the energy storage battery is lower than a preset third threshold value;
the fifth control submodule is used for controlling the energy storage battery to supply power to the electrical appliance under the condition that the difference value is smaller than the preset first threshold value, the electric quantity stored by the energy storage battery is larger than or equal to a preset fourth threshold value, and the electric power price of the power grid is a peak price;
and the sixth control submodule is used for controlling the power grid to supply power to the electrical appliance under the conditions that the difference value is smaller than the preset first threshold value, the electric quantity stored by the energy storage battery is larger than or equal to the preset fourth threshold value and the electric power price of the power grid is not the peak price.
Optionally, the first power supply module is configured to control the photovoltaic power generation device to supply power to the electrical appliance when the difference is equal to a preset first threshold.
Optionally, the second power supply module includes:
the first judgment submodule is used for judging whether the power grid is in a power supply stop state;
the seventh control submodule is used for controlling the energy storage battery to supply power to the electrical appliance under the condition that the power grid is in a power supply stop state;
the second judgment submodule is used for judging whether the voltage of the power grid is smaller than or equal to a preset fifth threshold value or not under the condition that the power grid is not in a power supply stop state;
the eighth control submodule is used for controlling the energy storage battery to supply power to the electrical appliance under the condition that the power grid voltage is less than or equal to the preset fifth threshold value;
the third judgment submodule is used for judging whether the power grid frequency is in a preset range or not under the condition that the power grid voltage is greater than the preset fifth threshold value;
and the ninth control submodule is used for controlling the energy storage battery to supply power to the electrical appliance under the condition that the power grid frequency is out of the preset range.
As can be seen from the above technical solutions, the present application provides a power supply control method and a power supply control apparatus, where the method includes: judging whether the current power utilization is normal power utilization; under the condition that the current power consumption is normal power consumption, acquiring a difference value between the photovoltaic power generation electric energy increment and the electric energy consumption increment of the electric appliance, and supplying power to the electric appliance according to the difference value; and under the condition that the current electricity utilization is abnormal electricity utilization, controlling the energy storage battery to supply power to the electric appliance. Therefore, under the condition that the current electricity consumption is normal electricity consumption, the electricity can be supplied to the electric appliance according to the difference value of the photovoltaic power generation electric energy increment and the electric appliance consumption electric energy increment; under the condition that the current electricity utilization is abnormal electricity utilization, the energy storage battery can be controlled to supply power to the electric appliance. The household electricity cost can be reduced.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart of a power supply control method provided in the present application;
FIG. 2 is a flow chart of another power control method provided herein;
FIG. 3 is a flow chart of another power control method provided herein;
FIG. 4 is a flow chart of another power control method provided herein;
fig. 5 is a structural diagram of a power supply control device provided in the present application;
fig. 6 is a block diagram of another power supply control device provided in the present application;
FIG. 7 is a block diagram of another power control device provided herein;
fig. 8 is a structural diagram of another power supply control device provided in the present application.
Detailed Description
Reference will now be made in detail to embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following examples do not represent all embodiments consistent with the present application. But merely as exemplifications of systems and methods consistent with certain aspects of the application, as recited in the claims.
Referring to fig. 1, fig. 1 is a flowchart of a power supply control method provided in the present application. As shown in fig. 1, the method comprises the following steps:
step 101, judging whether the current power utilization is normal power utilization.
In step 101, before starting a day, a 24-hour power utilization optimization strategy can be optimized, including the starting time, the ending time and the charging power of each charging of the energy storage battery; the starting time, the ending time and the discharging power of each discharging of the energy storage battery can also be included. And at each time period of a new day, analysis and optimization can be carried out according to the data before the day, and then the data is exchanged with the power data of the day, and the exchange result can provide a basis for real-time control.
The residential electricity usage modes are classified into a normal mode and an abnormal mode. Skipping between the normal mode and the abnormal mode requires completing a self-locking link; and the self-locking link is also required to be completed when jumping among the three sub-modes of the abnormal mode. Whether the current electricity utilization is normal electricity utilization can be judged, namely whether the current resident electricity utilization mode is the normal mode can be judged.
And 102, under the condition that the current power consumption is normal power consumption, obtaining a difference value between the photovoltaic power generation electric energy increment and the electric energy consumption increment of the electric appliance, and supplying power to the electric appliance according to the difference value.
In step 102, in the case that the current electricity usage is normal electricity usage, that is, in the case that the current residential electricity usage mode is the normal mode, a difference between the photovoltaic power generation electric energy increment and the electric appliance consumed electric energy increment may be obtained, and the electric appliance may be supplied with power according to the difference.
It should be noted that the smart home includes various household appliances. Such as air conditioners, heaters, washing machines, refrigerators, plug-in hybrid vehicles, and the like. Let a denote a certain household appliance, and a denote the set of all household appliances. The day can be divided into a plurality of power utilization time periods, and the division of the power utilization time periods depends on the power price information and the intelligent powerThe table has different capabilities for processing information, and the unit may be seconds, minutes, hours, or the like. For example, 1 hour may be used as one power consumption period. Assuming that t is any one of the divided power usage periods,and means t electric energy consumed by the electric appliance in the power utilization time period.
Wherein,for the photovoltaic power generation electric energy increment at the time t,delta P for the electric power consumption increment of the appliance at time ttThe difference value between the photovoltaic power generation electric energy increment and the electric energy consumption increment of the electric appliance at the moment t.
In the case that the difference is greater than the preset first threshold, it may be determined whether the amount of electricity stored in the energy storage battery is greater than or equal to a preset second threshold. The preset first threshold may be zero. I.e. at Δ PtIf the photovoltaic power generation electric energy increment is larger than the electric energy consumption increment of the electric appliance, whether the electric quantity stored by the energy storage battery is larger than or equal to a preset second threshold value or not can be determined, namely whether the electric quantity stored by the energy storage battery is full or not can be determined.
Under the condition that the electric quantity stored by the energy storage battery is greater than or equal to a preset second threshold value, namely under the condition that the electric quantity stored by the energy storage battery is full, if the electric energy using mode of the power grid side is not fixed, namely only the photovoltaic electric energy is fixedly planned, the photovoltaic power generation equipment can be controlled to supply power for the electric appliance, and extra photovoltaic power generation electric energy can be given up, and the extra photovoltaic power generation electric energy is wasted due to the limited capacity of the energy storage battery; if the electric quantity stored by the energy storage battery is full and the electric energy using mode of the power grid side is set, the photovoltaic power generation equipment can be controlled to supply power to the electric appliance. When the electric quantity stored by the energy storage battery is smaller than a preset second threshold value, namely under the condition that the electric quantity stored by the energy storage battery is not full, and under the condition that the current electric power price of the power grid is higher than the electric power price of the photovoltaic power, the photovoltaic power generation equipment can be controlled to supply power to the electric appliance. The electric quantity stored in the energy storage battery is smaller than a preset second threshold value, namely under the condition that the electric quantity stored in the energy storage battery is not full, and under the condition that the current electric power price of the power grid is lower than the electric price of the photovoltaic power, the photovoltaic power generation electric energy can be stored in the energy storage battery, the power grid can be controlled to supply power to the electric appliance, and the photovoltaic power generation electric energy is stored in the energy storage battery for future use.
When the difference is smaller than a preset first threshold value, i.e. at Δ PtIf the photovoltaic power generation electric energy increment is smaller than the electric energy consumption increment of the electric appliance, and the electric quantity stored by the energy storage battery is lower than a preset third threshold value, the electric network can be controlled to supply power to the electric appliance. For example, at Δ PtAnd (3) less than 0, namely under the condition that the increment of the electric energy of the photovoltaic power generation is less than the increment of the electric energy consumed by the electric appliance and under the condition that the electric quantity stored by the energy storage battery is zero, the electric network can be controlled to supply power to the electric appliance. When the difference is smaller than a preset first threshold value, i.e. at Δ PtIf the photovoltaic power generation electric energy increment is smaller than the electric energy consumption increment of the electric appliance, the electric quantity stored in the energy storage battery is larger than or equal to a preset fourth threshold value, and the electric power price of the power grid is the peak price, the energy storage battery can be controlled to supply power to the electric appliance. I.e. at Δ PtAnd (3) less than 0, namely, the energy storage battery can be controlled to supply power to the electric appliance under the conditions that the increment of the electric energy of the photovoltaic power generation is less than the increment of the electric energy consumed by the electric appliance, the electric quantity of the energy storage battery is stored, and the electric energy price of the power grid is at the peak price. When the difference is smaller than a preset first threshold value, i.e. at Δ PtIf the photovoltaic power generation electric energy increment is smaller than the electric energy consumption increment of the electric appliance, the electric quantity stored by the energy storage battery is larger than or equal to a preset fourth threshold value, and the electric energy price of the electric energy of the power grid is not peakUnder the condition of price, the power grid can be controlled to supply power to the electric appliance. I.e. at Δ PtAnd (3) less than 0, namely, under the conditions that the increment of the photovoltaic power generation electric energy is less than the increment of the electric energy consumed by the electric appliance, the energy storage battery has electric quantity for storage, and the electric energy price of the power grid is not the peak price, the power grid can be controlled to supply power to the electric appliance.
In the case where the above-mentioned difference is equal to a preset first threshold, i.e. at Δ PtAnd when the photovoltaic power generation electric energy increment is equal to the electric energy consumption increment of the electric appliance, the photovoltaic power generation equipment can be controlled to supply power to the electric appliance. At the moment, the increment of the photovoltaic power generation electric energy is equal to the increment of the electric energy consumed by the electric appliance, the electric appliance is in a supply and demand balance state, and the photovoltaic power generation electric energy can be completely used.
And 103, controlling the energy storage battery to supply power to the electric appliance under the condition that the current power utilization is abnormal power utilization.
In step 103, in the case that the current power utilization is abnormal power utilization, the energy storage battery may be controlled to supply power to the electrical appliance. For example, it may be determined whether the grid is in a power outage state. Under the condition that the power grid is in a power supply stopping state, the energy storage battery can be controlled to supply power to the electric appliance.
And under the condition that the power grid is not in the power supply stopping state, judging whether the power grid voltage is smaller than or equal to a preset fifth threshold value. And under the condition that the voltage of the power grid is less than or equal to the preset fifth threshold, the energy storage battery can be controlled to supply power to the electric appliance.
And under the condition that the power grid voltage is greater than the preset fifth threshold value, judging whether the power grid frequency is in a preset range. Wherein the preset range may be 47.5Hz-52.5 Hz. And under the condition that the frequency of the power grid is out of the preset range, the energy storage battery can be controlled to supply power to the electric appliance.
The power supply control method provided by the application judges whether the current power consumption is normal power consumption; under the condition that the current power consumption is normal power consumption, acquiring a difference value between the photovoltaic power generation electric energy increment and the electric energy consumption increment of the electric appliance, and supplying power to the electric appliance according to the difference value; and under the condition that the current electricity utilization is abnormal electricity utilization, controlling the energy storage battery to supply power to the electric appliance. Therefore, under the condition that the current electricity consumption is normal electricity consumption, the electricity can be supplied to the electric appliance according to the difference value of the photovoltaic power generation electric energy increment and the electric appliance consumption electric energy increment; under the condition that the current electricity utilization is abnormal electricity utilization, the energy storage battery can be controlled to supply power to the electric appliance. The household electricity cost can be reduced.
Referring to fig. 2, fig. 2 is a flowchart of another power supply control method provided in the present application. As shown in fig. 2, the method comprises the following steps:
step 201, judging whether the current power utilization is normal power utilization.
In step 201, before starting a day, a 24-hour power utilization optimization strategy can be optimized, including the starting time, the ending time and the charging power of each charging of the energy storage battery; the starting time, the ending time and the discharging power of each discharging of the energy storage battery can also be included. And at each time period of a new day, analysis and optimization can be carried out according to the data before the day, and then the data is exchanged with the power data of the day, and the exchange result can provide a basis for real-time control.
The residential electricity usage modes are classified into a normal mode and an abnormal mode. Skipping between the normal mode and the abnormal mode requires completing a self-locking link; and the self-locking link is also required to be completed when jumping among the three sub-modes of the abnormal mode. Whether the current electricity utilization is normal electricity utilization can be judged, namely whether the current resident electricity utilization mode is the normal mode can be judged.
Step 202, under the condition that the current power consumption is normal power consumption, obtaining a difference value between the photovoltaic power generation electric energy increment and the electric energy consumption increment of the electric appliance, and under the condition that the difference value is larger than a preset first threshold value, determining whether the electric quantity stored by the energy storage battery is larger than or equal to a preset second threshold value.
In step 202, in the case that the current electricity usage is normal electricity usage, that is, in the case that the current residential electricity usage mode is the normal mode, a difference between the photovoltaic power generation electric energy increment and the electric appliance consumption electric energy increment may be obtained, and the electric appliance may be supplied with power according to the difference.
It should be noted that the smart home includes various household appliances. Such as air conditioners, heaters, washing machines, refrigerators, plug-in hybrid vehicles, and the like. Let a denote a certain household appliance, and a denote the set of all household appliances. The day can be divided into a plurality of electricity utilization time periods, the division of the electricity utilization time periods is different according to different electricity price information and the information processing capacity of the intelligent electricity meter, and the unit can be seconds, minutes, hours and the like. For example, 1 hour may be used as one power consumption period. Assuming that t is any one of the divided power usage periods,and means t electric energy consumed by the electric appliance in the power utilization time period.
Wherein,for the photovoltaic power generation electric energy increment at the time t,delta P for the electric power consumption increment of the appliance at time ttThe difference value between the photovoltaic power generation electric energy increment and the electric energy consumption increment of the electric appliance at the moment t.
In the case that the difference is greater than the preset first threshold, it may be determined whether the amount of electricity stored in the energy storage battery is greater than or equal to a preset second threshold. The preset first threshold may be zero. I.e. at Δ PtIf the photovoltaic power generation electric energy increment is greater than the electric energy consumption increment of the electric appliance, whether the electric quantity stored by the energy storage battery is greater than or equal to a preset second threshold value or not can be determined, namely, the electric quantity stored by the energy storage battery is determined to beIf not, the container is full.
And 203, controlling the photovoltaic power generation equipment to supply power to the electrical appliance under the condition that the electric quantity stored by the energy storage battery is greater than or equal to the preset second threshold value.
In step 203, if the electric energy usage mode of the grid side is not fixed, that is, only the photovoltaic electric energy is fixedly planned, the photovoltaic power generation device may be controlled to supply power to the electrical appliance, and additional photovoltaic power generation electric energy may be abandoned, where the additional photovoltaic power generation electric energy is wasted because the capacity of the energy storage battery is limited, when the electric quantity stored by the energy storage battery is greater than or equal to the preset second threshold value, that is, when the electric quantity stored by the energy storage battery is full; if the electric quantity stored by the energy storage battery is full and the electric energy using mode of the power grid side is set, the photovoltaic power generation equipment can be controlled to supply power to the electric appliance.
And 204, controlling the photovoltaic power generation equipment to supply power to the electrical appliance under the condition that the electric quantity stored by the energy storage battery is smaller than the preset second threshold value and the current electric power price of the power grid is higher than the electric power price of the photovoltaic power.
In step 204, when the amount of electricity stored in the energy storage battery is less than a preset second threshold, that is, when the amount of electricity stored in the energy storage battery is not full, and when the current power grid electricity price is higher than the photovoltaic electricity price, the photovoltaic power generation device may be controlled to supply power to the electrical appliance.
And step 205, storing the photovoltaic power generation electric energy into the energy storage battery and controlling the power grid to supply power to the electric appliance under the condition that the electric quantity stored by the energy storage battery is smaller than the preset second threshold value and the current electric power price of the power grid is lower than the electric power price of the photovoltaic power.
In step 205, when the amount of electricity stored in the energy storage cell is less than the preset second threshold, that is, when the amount of electricity stored in the energy storage cell is not full, and when the current power grid electricity price is lower than the photovoltaic electricity price, the photovoltaic electricity generation energy can be stored in the energy storage cell, and the power grid can be controlled to supply power to the electrical appliance, and at this time, the photovoltaic electricity generation energy is stored in the energy storage cell for future use.
And step 206, controlling the energy storage battery to supply power to the electric appliance under the condition that the current power consumption is abnormal power consumption.
In step 206, in the case that the current power consumption is abnormal power consumption, the energy storage battery may be controlled to supply power to the electrical appliance.
Optionally, the controlling the energy storage battery to supply power to the electrical appliance includes:
judging whether the power grid is in a power supply stopping state;
under the condition that the power grid is in a power supply stopping state, controlling the energy storage battery to supply power to the electrical appliance;
under the condition that the power grid is not in a power supply stopping state, judging whether the voltage of the power grid is smaller than or equal to a preset fifth threshold value or not;
under the condition that the power grid voltage is smaller than or equal to the preset fifth threshold, controlling the energy storage battery to supply power to the electrical appliance;
under the condition that the power grid voltage is larger than the preset fifth threshold, judging whether the power grid frequency is in a preset range;
and under the condition that the power grid frequency is out of the preset range, controlling the energy storage battery to supply power to the electric appliance.
For example, it may be determined whether the grid is in a power outage state. Under the condition that the power grid is in a power supply stopping state, the energy storage battery can be controlled to supply power to the electric appliance.
And under the condition that the power grid is not in the power supply stopping state, judging whether the power grid voltage is smaller than or equal to a preset fifth threshold value. And under the condition that the voltage of the power grid is less than or equal to the preset fifth threshold, the energy storage battery can be controlled to supply power to the electric appliance.
And under the condition that the power grid voltage is greater than the preset fifth threshold value, judging whether the power grid frequency is in a preset range. Wherein the preset range may be 47.5Hz-52.5 Hz. And under the condition that the frequency of the power grid is out of the preset range, the energy storage battery can be controlled to supply power to the electric appliance.
According to the power supply control method, under the condition that the current power consumption is normal power consumption and the difference value between the photovoltaic power generation electric energy increment and the electric appliance consumed electric energy increment is larger than the preset first threshold value, the power supply mode can be selected according to the electric quantity stored by the energy storage battery, the current power grid electric energy price and the photovoltaic electric energy price. The household electricity cost can be reduced.
Referring to fig. 3, fig. 3 is a flowchart of another power supply control method provided in the present application. As shown in fig. 3, the method comprises the following steps:
and 301, judging whether the current power utilization is normal power utilization.
In step 301, before starting a day, a 24-hour power utilization optimization strategy can be optimized, including the starting time, the ending time and the charging power of each charging of the energy storage battery; the starting time, the ending time and the discharging power of each discharging of the energy storage battery can also be included. And at each time period of a new day, analysis and optimization can be carried out according to the data before the day, and then the data is exchanged with the power data of the day, and the exchange result can provide a basis for real-time control.
The residential electricity usage modes are classified into a normal mode and an abnormal mode. Skipping between the normal mode and the abnormal mode requires completing a self-locking link; and the self-locking link is also required to be completed when jumping among the three sub-modes of the abnormal mode. Whether the current electricity utilization is normal electricity utilization can be judged, namely whether the current resident electricity utilization mode is the normal mode can be judged.
Step 302, under the condition that the current power consumption is normal power consumption, obtaining a difference value between the photovoltaic power generation electric energy increment and the electric energy consumption increment of the electric appliance, and under the condition that the difference value is smaller than a preset first threshold value and the electric quantity stored by the energy storage battery is lower than a preset third threshold value, controlling a power grid to supply power to the electric appliance.
In step 302, in the case that the current electricity usage is normal electricity usage, that is, in the case that the current residential electricity usage mode is the normal mode, a difference between the photovoltaic power generation electric energy increment and the electric appliance consumed electric energy increment may be obtained, and the electric appliance may be supplied with power according to the difference.
It should be noted that the smart home includes various household appliances. Such as air conditioners, heaters, washing machines, refrigerators, plug-in hybrid vehicles, and the like. Let a denote a certain household appliance, and a denote the set of all household appliances. The day can be divided into a plurality of electricity utilization time periods, the division of the electricity utilization time periods is different according to different electricity price information and the information processing capacity of the intelligent electricity meter, and the unit can be seconds, minutes, hours and the like. For example, 1 hour may be used as one power consumption period. Assuming that t is any one of the divided power usage periods,and means t electric energy consumed by the electric appliance in the power utilization time period.
Wherein,for the photovoltaic power generation electric energy increment at the time t,delta P for the electric power consumption increment of the appliance at time ttThe difference value between the photovoltaic power generation electric energy increment and the electric energy consumption increment of the electric appliance at the moment t.
When the difference is smaller than a preset first threshold valueI.e. at Δ PtIf the photovoltaic power generation electric energy increment is smaller than the electric energy consumption increment of the electric appliance, and the electric quantity stored by the energy storage battery is lower than a preset third threshold value, the electric network can be controlled to supply power to the electric appliance. For example, at Δ PtAnd (3) less than 0, namely under the condition that the increment of the electric energy of the photovoltaic power generation is less than the increment of the electric energy consumed by the electric appliance and under the condition that the electric quantity stored by the energy storage battery is zero, the electric network can be controlled to supply power to the electric appliance.
And 303, controlling the energy storage battery to supply power to the electrical appliance when the difference value is smaller than the preset first threshold value, the electric quantity stored by the energy storage battery is larger than or equal to a preset fourth threshold value, and the electric power price of the power grid is a peak price.
In step 303, when the difference is smaller than a preset first threshold, i.e. at Δ PtIf the photovoltaic power generation electric energy increment is smaller than the electric energy consumption increment of the electric appliance, the electric quantity stored in the energy storage battery is larger than or equal to a preset fourth threshold value, and the electric power price of the power grid is the peak price, the energy storage battery can be controlled to supply power to the electric appliance. I.e. at Δ PtAnd (3) less than 0, namely, the energy storage battery can be controlled to supply power to the electric appliance under the conditions that the increment of the electric energy of the photovoltaic power generation is less than the increment of the electric energy consumed by the electric appliance, the electric quantity of the energy storage battery is stored, and the electric energy price of the power grid is at the peak price.
And 304, controlling a power grid to supply power to the electric appliance under the conditions that the difference value is smaller than the preset first threshold value, the electric quantity stored by the energy storage battery is larger than or equal to the preset fourth threshold value, and the electric energy price of the power grid is not the peak price.
In step 304, when the difference is smaller than the preset first threshold, i.e. at Δ PtIf the photovoltaic power generation electric energy increment is smaller than the electric energy consumption increment of the electric appliance, the electric quantity stored by the energy storage battery is larger than or equal to a preset fourth threshold value, and the electric price of the electric energy of the power grid is not the peak price, the power grid can be controlled to supply power to the electric appliance. I.e. at Δ Pt< 0, i.e. in photovoltaic power generationThe energy increment is smaller than the electric energy consumption increment of the electric appliance, the energy storage battery stores the electric quantity, and the power grid can be controlled to supply power to the electric appliance under the condition that the electric energy price of the power grid is not the peak price.
And 305, controlling the energy storage battery to supply power to the electric appliance under the condition that the current power utilization is abnormal power utilization.
In step 305, in the case that the current power utilization is abnormal power utilization, the energy storage battery may be controlled to supply power to the electrical appliance. For example, it may be determined whether the grid is in a power outage state. Under the condition that the power grid is in a power supply stopping state, the energy storage battery can be controlled to supply power to the electric appliance.
And under the condition that the power grid is not in the power supply stopping state, judging whether the power grid voltage is smaller than or equal to a preset fifth threshold value. And under the condition that the voltage of the power grid is less than or equal to the preset fifth threshold, the energy storage battery can be controlled to supply power to the electric appliance.
And under the condition that the power grid voltage is greater than the preset fifth threshold value, judging whether the power grid frequency is in a preset range. Wherein the preset range may be 47.5Hz-52.5 Hz. And under the condition that the frequency of the power grid is out of the preset range, the energy storage battery can be controlled to supply power to the electric appliance.
According to the power supply control method, under the condition that the current power consumption is normal power consumption and the condition that the difference value between the photovoltaic power generation electric energy increment and the electric appliance consumed electric energy increment is smaller than the preset first threshold value, the power supply mode can be selected according to the electric quantity stored by the energy storage battery and the electric power price of the power grid. The household electricity cost can be reduced.
Referring to fig. 4, fig. 4 is a flowchart of another power supply control method provided by the present application. As shown in fig. 4, the method comprises the following steps:
step 401, judging whether the current power utilization is normal power utilization.
In step 401, before starting a day, a 24-hour power utilization optimization strategy can be optimized, including the starting time, the ending time and the charging power of each charging of the energy storage battery; the starting time, the ending time and the discharging power of each discharging of the energy storage battery can also be included. And at each time period of a new day, analysis and optimization can be carried out according to the data before the day, and then the data is exchanged with the power data of the day, and the exchange result can provide a basis for real-time control.
The residential electricity usage modes are classified into a normal mode and an abnormal mode. Skipping between the normal mode and the abnormal mode requires completing a self-locking link; and the self-locking link is also required to be completed when jumping among the three sub-modes of the abnormal mode. Whether the current electricity utilization is normal electricity utilization can be judged, namely whether the current resident electricity utilization mode is the normal mode can be judged.
Step 402, under the condition that the current power consumption is normal power consumption, obtaining a difference value between the photovoltaic power generation electric energy increment and the electric appliance consumption electric energy increment, and under the condition that the difference value is equal to a preset first threshold value, controlling the photovoltaic power generation equipment to supply power to the electric appliance.
In step 402, in the case that the current electricity usage is normal electricity usage, that is, in the case that the current residential electricity usage mode is the normal mode, a difference between the photovoltaic power generation electric energy increment and the electric appliance consumed electric energy increment may be obtained, and the electric appliance may be supplied with power according to the difference.
It should be noted that the smart home includes various household appliances. Such as air conditioners, heaters, washing machines, refrigerators, plug-in hybrid vehicles, and the like. Let a denote a certain household appliance, and a denote the set of all household appliances. The day can be divided into a plurality of electricity utilization time periods, the division of the electricity utilization time periods is different according to different electricity price information and the information processing capacity of the intelligent electricity meter, and the unit can be seconds, minutes, hours and the like. For example, 1 hour may be used as one power consumption period. Assuming that t is any one of the divided power usage periods,point t thisThe electric energy consumed by the electric appliance in the electricity utilization time period.
Wherein,for the photovoltaic power generation electric energy increment at the time t,delta P for the electric power consumption increment of the appliance at time ttThe difference value between the photovoltaic power generation electric energy increment and the electric energy consumption increment of the electric appliance at the moment t.
In the case where the above-mentioned difference is equal to a preset first threshold, i.e. at Δ PtAnd when the photovoltaic power generation electric energy increment is equal to the electric energy consumption increment of the electric appliance, the photovoltaic power generation equipment can be controlled to supply power to the electric appliance. At the moment, the increment of the photovoltaic power generation electric energy is equal to the increment of the electric energy consumed by the electric appliance, the electric appliance is in a supply and demand balance state, and the photovoltaic power generation electric energy can be completely used.
And step 403, controlling the energy storage battery to supply power to the electric appliance under the condition that the current power utilization is abnormal power utilization.
In step 403, in the case that the current power utilization is abnormal power utilization, the energy storage battery may be controlled to supply power to the electrical appliance. For example, it may be determined whether the grid is in a power outage state. Under the condition that the power grid is in a power supply stopping state, the energy storage battery can be controlled to supply power to the electric appliance.
And under the condition that the power grid is not in the power supply stopping state, judging whether the power grid voltage is smaller than or equal to a preset fifth threshold value. And under the condition that the voltage of the power grid is less than or equal to the preset fifth threshold, the energy storage battery can be controlled to supply power to the electric appliance.
And under the condition that the power grid voltage is greater than the preset fifth threshold value, judging whether the power grid frequency is in a preset range. Wherein the preset range may be 47.5Hz-52.5 Hz. And under the condition that the frequency of the power grid is out of the preset range, the energy storage battery can be controlled to supply power to the electric appliance.
According to the power supply control method, under the condition that the current power utilization is normal power utilization, and under the condition that the difference value between the photovoltaic power generation electric energy increment and the electric appliance consumption electric energy increment is equal to the preset first threshold value, the photovoltaic power generation equipment can be controlled to supply power to the electric appliance. At the moment, the system is in a supply and demand balance state, and the photovoltaic power generation electric energy can be completely used. The household electricity cost can be reduced.
Referring to fig. 5, fig. 5 is a structural diagram of a power supply control device provided in the present application. As shown in fig. 5, the power supply control device 500 includes a determination module 501, a first power supply module 502, and a second power supply module 503, wherein:
the judging module 501 is configured to judge whether current power consumption is normal power consumption;
the first power supply module 502 is configured to, when current power consumption is normal power consumption, obtain a difference between a photovoltaic power generation electric energy increment and an electric appliance consumption electric energy increment, and supply power to an electric appliance according to the difference;
and the second power supply module 503 is configured to control the energy storage battery to supply power to the electrical appliance when the current power consumption is abnormal power consumption.
Optionally, as shown in fig. 6, the first power supply module 502 includes:
the determining submodule 5021 is used for determining whether the electric quantity stored in the energy storage battery is larger than or equal to a preset second threshold value or not under the condition that the difference value is larger than a preset first threshold value;
the first control submodule 5022 is used for controlling the photovoltaic power generation equipment to supply power to the electrical appliance under the condition that the electric quantity stored in the energy storage battery is greater than or equal to the preset second threshold value;
the second control submodule 5023 is used for controlling the photovoltaic power generation equipment to supply power to the electrical appliance under the condition that the electric quantity stored by the energy storage battery is smaller than the preset second threshold value and the current power grid electric energy price is higher than the photovoltaic electric energy price;
and the third control sub-module 5024 is used for storing the photovoltaic power generation electric energy into the energy storage battery and controlling the power grid to supply power to the electrical appliance under the condition that the electric quantity stored in the energy storage battery is smaller than the preset second threshold value and the current power grid electric energy price is lower than the photovoltaic power grid electric energy price.
Optionally, as shown in fig. 7, the first power supply module 502 further includes:
the fourth control submodule 5025 is used for controlling a power grid to supply power to the electrical appliance under the condition that the difference value is smaller than a preset first threshold value and the electric quantity stored by the energy storage battery is lower than a preset third threshold value;
the fifth control submodule 5026 is used for controlling the energy storage battery to supply power to the electrical appliance under the condition that the difference value is smaller than the preset first threshold value, the electric quantity stored by the energy storage battery is larger than or equal to a preset fourth threshold value, and the electricity price of the electric energy of the power grid is a peak price;
the sixth control submodule 5027 is used for controlling the power grid to supply power to the electrical appliance when the difference value is smaller than the preset first threshold value, the electric quantity stored by the energy storage battery is larger than or equal to the preset fourth threshold value, and the electric energy price of the power grid is not the peak price.
Optionally, the first power supply module 502 is configured to control the photovoltaic power generation device to supply power to the electrical appliance when the difference is equal to a preset first threshold.
Optionally, as shown in fig. 8, the second power supply module 503 includes:
the first judging submodule 5031 is configured to judge whether the power grid is in a power supply stop state;
a seventh control submodule 5032, configured to control the energy storage battery to supply power to the electrical appliance when the power grid is in a power supply stop state;
the second determining submodule 5033 is configured to determine whether the grid voltage is smaller than or equal to a preset fifth threshold value when the power grid is not in a power supply stop state;
an eighth control submodule 5034, configured to control the energy storage battery to supply power to the electrical appliance when the grid voltage is less than or equal to the preset fifth threshold;
the third determining submodule 5035 is configured to determine whether the grid frequency is within a preset range when the grid voltage is greater than the preset fifth threshold;
a ninth control submodule 5036, configured to control the energy storage battery to supply power to the electrical apparatus when the grid frequency is outside the preset range.
The power supply control device 500 can implement each process implemented by the power supply control device in the method embodiments of fig. 1 to fig. 4, and is not described herein again to avoid repetition. The power supply control device 500 can supply power to the electrical appliance according to the difference between the photovoltaic power generation electric energy increment and the electric energy consumption increment of the electrical appliance when the current power consumption is normal power consumption; under the condition that the current electricity utilization is abnormal electricity utilization, the energy storage battery can be controlled to supply power to the electric appliance. The household electricity cost can be reduced.
The embodiments provided in the present application are only a few examples of the general concept of the present application, and do not limit the scope of the present application. Any other embodiments extended according to the scheme of the present application without inventive efforts will be within the scope of protection of the present application for a person skilled in the art.
Claims (10)
1. A power supply control method, comprising:
judging whether the current power utilization is normal power utilization;
under the condition that the current power consumption is normal power consumption, acquiring a difference value between the photovoltaic power generation electric energy increment and the electric energy consumption increment of the electric appliance, and supplying power to the electric appliance according to the difference value;
and under the condition that the current electricity utilization is abnormal electricity utilization, controlling the energy storage battery to supply power to the electric appliance.
2. The method of claim 1, wherein said powering the appliance based on the difference comprises:
determining whether the electric quantity stored by the energy storage battery is greater than or equal to a preset second threshold value or not under the condition that the difference value is greater than a preset first threshold value;
under the condition that the electric quantity stored by the energy storage battery is greater than or equal to the preset second threshold value, controlling photovoltaic power generation equipment to supply power to the electrical appliance;
when the electric quantity stored by the energy storage battery is smaller than the preset second threshold value and the current power grid electric energy price is higher than the photovoltaic electric energy price, controlling the photovoltaic power generation equipment to supply power to the electric appliance;
and under the conditions that the electric quantity stored by the energy storage battery is smaller than the preset second threshold value and the current electric power price of the power grid is lower than the electric power price of the photovoltaic power, storing the photovoltaic power generation electric energy into the energy storage battery and controlling the power grid to supply power to the electric appliance.
3. The method of claim 1, wherein said powering the appliance based on the difference comprises:
under the condition that the difference value is smaller than a preset first threshold value and the electric quantity stored by the energy storage battery is lower than a preset third threshold value, controlling a power grid to supply power to the electric appliance;
when the difference value is smaller than the preset first threshold value, the electric quantity stored by the energy storage battery is larger than or equal to a preset fourth threshold value, and the electric power price of the power grid is the peak price, controlling the energy storage battery to supply power to the electric appliance;
and controlling the power grid to supply power to the electrical appliance under the conditions that the difference value is smaller than the preset first threshold value, the electric quantity stored by the energy storage battery is larger than or equal to the preset fourth threshold value, and the electric power price of the power grid is not the peak price.
4. The method of claim 1, wherein said powering the appliance based on the difference comprises:
and under the condition that the difference value is equal to a preset first threshold value, controlling the photovoltaic power generation equipment to supply power to the electrical appliance.
5. The method of any one of claims 1 to 4, wherein controlling the energy storage battery to power the appliance comprises:
judging whether the power grid is in a power supply stopping state;
under the condition that the power grid is in a power supply stopping state, controlling the energy storage battery to supply power to the electrical appliance;
under the condition that the power grid is not in a power supply stopping state, judging whether the voltage of the power grid is smaller than or equal to a preset fifth threshold value or not;
under the condition that the power grid voltage is smaller than or equal to the preset fifth threshold, controlling the energy storage battery to supply power to the electrical appliance;
under the condition that the power grid voltage is larger than the preset fifth threshold, judging whether the power grid frequency is in a preset range;
and under the condition that the power grid frequency is out of the preset range, controlling the energy storage battery to supply power to the electric appliance.
6. A power supply control device characterized by comprising:
the judging module is used for judging whether the current power utilization is normal power utilization;
the first power supply module is used for acquiring a difference value between the photovoltaic power generation electric energy increment and the electric energy consumption increment of the electric appliance under the condition that the current power consumption is normal power consumption, and supplying power to the electric appliance according to the difference value;
and the second power supply module is used for controlling the energy storage battery to supply power to the electric appliance under the condition that the current power utilization is abnormal power utilization.
7. The power supply control device according to claim 6, wherein the first power supply module includes:
the determining submodule is used for determining whether the electric quantity stored by the energy storage battery is greater than or equal to a preset second threshold value or not under the condition that the difference value is greater than a preset first threshold value;
the first control submodule is used for controlling the photovoltaic power generation equipment to supply power to the electrical appliance under the condition that the electric quantity stored by the energy storage battery is greater than or equal to the preset second threshold value;
the second control submodule is used for controlling the photovoltaic power generation equipment to supply power to the electrical appliance under the condition that the electric quantity stored by the energy storage battery is smaller than the preset second threshold value and the current power grid electric energy price is higher than the photovoltaic electric energy price;
and the third control sub-module is used for storing the photovoltaic power generation electric energy into the energy storage battery and controlling the power grid to supply power to the electric appliance under the condition that the electric quantity stored by the energy storage battery is smaller than the preset second threshold value and the current electric power price of the power grid is lower than the electric power price of the photovoltaic power.
8. The power supply control device of claim 6, wherein the first power supply module further comprises:
the fourth control submodule is used for controlling a power grid to supply power to the electrical appliance under the condition that the difference value is smaller than a preset first threshold value and the electric quantity stored by the energy storage battery is lower than a preset third threshold value;
the fifth control submodule is used for controlling the energy storage battery to supply power to the electrical appliance under the condition that the difference value is smaller than the preset first threshold value, the electric quantity stored by the energy storage battery is larger than or equal to a preset fourth threshold value, and the electric power price of the power grid is a peak price;
and the sixth control submodule is used for controlling the power grid to supply power to the electrical appliance under the conditions that the difference value is smaller than the preset first threshold value, the electric quantity stored by the energy storage battery is larger than or equal to the preset fourth threshold value and the electric power price of the power grid is not the peak price.
9. The power supply control device according to claim 6, wherein the first power supply module is configured to control a photovoltaic power generation device to supply power to the electrical appliance when the difference is equal to a preset first threshold.
10. The power supply control device according to any one of claims 6 to 9, wherein the second power supply module includes:
the first judgment submodule is used for judging whether the power grid is in a power supply stop state;
the seventh control submodule is used for controlling the energy storage battery to supply power to the electrical appliance under the condition that the power grid is in a power supply stop state;
the second judgment submodule is used for judging whether the voltage of the power grid is smaller than or equal to a preset fifth threshold value or not under the condition that the power grid is not in a power supply stop state;
the eighth control submodule is used for controlling the energy storage battery to supply power to the electrical appliance under the condition that the power grid voltage is less than or equal to the preset fifth threshold value;
the third judgment submodule is used for judging whether the power grid frequency is in a preset range or not under the condition that the power grid voltage is greater than the preset fifth threshold value;
and the ninth control submodule is used for controlling the energy storage battery to supply power to the electrical appliance under the condition that the power grid frequency is out of the preset range.
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