CN107769270B - Intelligent ammeter and charging method thereof - Google Patents

Intelligent ammeter and charging method thereof Download PDF

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CN107769270B
CN107769270B CN201711014382.3A CN201711014382A CN107769270B CN 107769270 B CN107769270 B CN 107769270B CN 201711014382 A CN201711014382 A CN 201711014382A CN 107769270 B CN107769270 B CN 107769270B
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electric quantity
user
time period
smart grid
power
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CN107769270A (en
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刘迪迪
马丽纳
孙浩天
刘以团
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Beijing Yupont Electric Power Technology Co ltd
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Guangxi Normal University
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means

Abstract

The invention relates to an intelligent ammeter and a charging method thereof, wherein the intelligent ammeter can wirelessly acquire a load information table of an intelligent power grid, a user selects a power supply and transmission mode according to the charge information table, when the mode of inputting electric quantity to the intelligent power grid is selected, current is controlled to flow from a user side to the intelligent power grid, a contribution value of the user in the period of inputting the electric quantity to the intelligent power grid is calculated, and the current contribution value of the user is updated; when the mode of acquiring the electric quantity from the smart grid is selected, the current is controlled to flow from the smart grid to the user side, the contribution value consumed during the period of acquiring the electric quantity by the user is calculated, whether the acquired electric quantity exceeds the free electric quantity or not is judged, and the generated electric charge is calculated. The method and the system can stimulate the user to transmit power to the smart grid in the time period with large load of the smart grid and obtain the electric quantity in the time period with small load of the smart grid, thereby reducing the load of the smart grid in the peak period of power utilization, smoothing the load of the smart grid and improving the consumption capacity of the smart grid.

Description

Intelligent ammeter and charging method thereof
Technical Field
The invention relates to the technical field of intelligent electric meters, in particular to an intelligent electric meter and a charging method thereof.
Background
With the development of industry and the increase of household appliances of residents, the demand degree of electric power is higher and higher, and particularly, the load of a power grid fluctuates correspondingly with the change of the demand of users for electric quantity in different time periods in the aspect of residential electricity utilization. The peak period of power consumption is mainly concentrated before work in the morning and after work in the evening, at the moment, the load of the power grid is huge, and the power grid needs to bear extra pressure higher than the average load; and in late night or early morning, the power consumption is in a low-ebb period, the load of the power grid is lower than the average load, and the power grid needs to contain higher electric quantity. The prior art generally adjusts the power of an electric appliance or adjusts the parameters of a voltage-regulating distribution transformer to relieve the load of a power grid, and has little effect.
Disclosure of Invention
The invention aims to solve the technical problems of the current situation of power consumption and the defects of the prior art, and provides the intelligent electric meter and the charging method thereof, which can stimulate a user to transmit power to the intelligent power grid in a time period with large load of the intelligent power grid and acquire electric quantity in a time period with small load of the intelligent power grid, thereby reducing the load of the intelligent power grid in a power consumption peak period, smoothing the load of the intelligent power grid and improving the consumption capacity of the intelligent power grid.
The technical scheme for solving the technical problems is as follows: a smart meter comprising:
the wireless communication module is used for acquiring a smart grid load information table from a smart grid information center;
the storage module is used for storing the intelligent power grid load information table;
the selection module is used for providing a user selection power supply and transmission mode, wherein the power supply and transmission mode comprises two modes of inputting electric quantity to the smart grid and acquiring the electric quantity from the smart grid; specifically, the user can select the power supply and transmission mode through two ways, the first way is: directly selecting a power supply mode from the selection module, wherein the second mode is as follows: a user selects a power supply and transmission mode from an intelligent terminal (for example, from an APP of a smart phone), sends the power supply and transmission mode to a wireless communication module of a smart electric meter, and transmits the power supply and transmission mode to a selection module through the wireless communication module;
the current control module is used for controlling current to flow from the user side to the smart grid and sending a first signal to the charging module when a mode of inputting electric quantity to the smart grid is selected; the intelligent power grid charging system is also used for controlling current to flow from the intelligent power grid to the user side and sending a second signal to the charging module when a mode of acquiring electric quantity from the intelligent power grid is selected;
the charging module is used for extracting information of each time period and corresponding load parameters during the electric quantity input period from the intelligent power grid load information table according to the first signal, calculating a contribution value of a user during the electric quantity input period to the intelligent power grid, and updating the current contribution value of the user, wherein the contribution value during the electric quantity input period is the sum of products of the electric quantity input to the intelligent power grid by the user in each time period and the corresponding load parameters in each time period;
and the intelligent power grid load information table is also used for extracting the information of each time period and the corresponding load parameter during the period of acquiring the electric quantity from the intelligent power grid load information table according to the second signal, calculating the contribution value consumed during the period of acquiring the electric quantity by the user, judging whether the acquired electric quantity exceeds the free electric quantity or not, and calculating the generated electric charge, wherein the free electric quantity is obtained by conversion according to the contribution value, namely the current contribution value of the user is obtained by dividing the load parameter.
The invention has the beneficial effects that: the system breaks through the traditional one-way demand type power utilization mode, a user can select two modes of inputting electric quantity to the smart grid and acquiring the electric quantity from the smart grid, and the user can input the surplus electric quantity into the smart grid through the smart meter so as to acquire a certain free electric quantity when the power is needed.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the smart grid load information table comprises information of each time period and load parameters corresponding to each time period, wherein the load parameters corresponding to each time period are power consumption numerical values of each time period or power price numerical values of each time period;
the load parameter value corresponding to the time period when the intelligent power grid load is larger, the contribution value corresponding to the electric quantity input to the intelligent power grid by the user is larger; when electric quantity is selected to be acquired from the smart grid, obtaining free electric quantity according to the contribution value, wherein the free electric quantity is converted more in a time period when the load of the smart grid is smaller;
electric quantity y delivered by user to smart gridiFree electric quantity x acquired from smart grid by userjIt should satisfy:
Figure BDA0001446149210000031
wherein i represents a time period for the user to transmit power to the smart grid, j represents a time period for the user to obtain free electric quantity from the smart grid,i、jthe load parameters of the intelligent power grid in the ith and the jth time periods are respectively, beta is a loss coefficient of electric quantity transmitted to the intelligent power grid by a user, and beta is more than 0 and less than or equal to 1.
The beneficial effect of adopting the further scheme is that: the user selects to transmit power to the smart grid in the peak period of power consumption of the smart grid or the time period with larger load, and can obtain more free electric quantity in the time period with smaller load of the smart grid, so that the user can be stimulated to input electric quantity to the smart grid in the time period with large load of the smart grid, and obtain the electric quantity in the time period with small load of the smart grid, thereby reducing the load of the peak period of power consumption of the smart grid, smoothing the load of the smart grid, and improving the consumption capacity of the smart grid.
Further, the intelligent electric meter also comprises a clock module; the clock module is used for providing current time information;
the charging module specifically comprises:
the extracting and recording unit is used for acquiring the current time from the clock module according to the first signal and matching the time period T to which the current time belongs from the intelligent power grid load information tableCExtracting load parameters corresponding to each time period during the input electric quantityiRecording the power transmission amount y of the user to the intelligent power grid in each time period during the input of the poweriI denotes each time period during which the amount of electric power is input, and i is TC,TC+1,TC+2, sending a first calculation instruction to the calculation unit when the input of the electric quantity is finished;
a calculating unit, configured to calculate, according to the first calculation instruction, a contribution value of the current power transmission of the user to the intelligent power grid
Figure BDA0001446149210000032
And according to the formula
Figure BDA0001446149210000033
Updating the current contribution value I of the user, wherein I0The contribution value is the existing contribution value before the current power transmission;
the extracting and recording unit is also used for molding from the clock according to the second signalThe current time is obtained from the block, and the time period T to which the current time belongs is matched from the intelligent power grid load information tableCExtracting load parameters corresponding to each time period during electric quantity acquisitionjRecording the electric quantity x acquired from the smart grid by the user in each time period during the electric quantity acquisition periodjJ denotes each time period during which the amount of electric power is input, and j is TC,TC+1,TC+2, respectively sending a second calculation instruction to the calculation unit when each time period is finished during the electric quantity acquisition process and when the electric quantity acquisition process is finished;
the calculating unit is further used for calculating the free electric quantity I-j，j＝TC,TC+1,TC+2., and judge xj≤I/jIf yes, the electric quantity acquired in the j time period does not exceed the free electric quantity, no electric charge is generated, and the contribution value consumed by the user in the j time period isj·xjAnd according to the formula I ═ I0-j·xjUpdating the current contribution value I of the user, wherein I0Acquiring the contribution value existing before the electric quantity for the j time period;
if xj≤I/jIf not, the electric quantity x acquired in the j time periodiThe non-free electricity quantity exceeds the free electricity quantity and is xj-I/jAnd according to the formula p (x)j-I/j) Calculating the electricity charge generated by acquiring the electricity quantity in the j time period, wherein p is the electricity price of the j time period, and F is the formula0+p·(xj-I/j) Updating the total electric charge F of the user, wherein F0The current contribution value I of the user is 0 for the electricity fee that has been generated before the electricity amount is acquired for the j-th time period.
Further, the intelligent electric meter also comprises a display module;
and the display module is used for displaying the intelligent power grid load information table, the current contribution value of the user, the electricity fee information, the power transmission amount during the period of inputting the electricity quantity and the power consumption amount during the period of acquiring the electricity quantity.
The beneficial effect of adopting the further scheme is that: the user can select the power supply and transmission mode according to the displayed information.
Further, the wireless communication module is also used for carrying out information interaction with the user intelligent terminal, wherein the information interaction comprises receiving a power supply and transmission mode selected by the user from the intelligent terminal, sending the power supply and transmission mode to the selection module, and sending the current contribution value of the user, the electric charge information, the power transmission amount during the period of inputting the electric quantity and the power consumption amount during the period of obtaining the electric quantity to the user intelligent terminal.
The beneficial effect of adopting the further scheme is that: the method and the system can perform information interaction with the intelligent terminal (such as a smart phone) of a user, and are convenient for the user to check information from the intelligent terminal (such as the smart phone) and remotely select a power supply and transmission mode.
Further, the wireless communication module is further configured to acquire time information from a smart grid and send the time information to the clock module, so that the clock module performs time correction.
Another technical solution of the present invention for solving the above technical problems is as follows: a charging method of a smart meter comprises the following steps:
step S1: acquiring a smart grid load information table from a smart grid information center;
step S2: saving the intelligent power grid load information table;
step S3: acquiring a power supply and transmission mode selected by a user, wherein the power supply and transmission mode comprises two modes of inputting power to the smart grid and acquiring power from the smart grid, when the mode of inputting power to the smart grid is selected, executing step S4, and when the mode of acquiring power from the smart grid is selected, executing step S5;
step S4: controlling the current to flow from the user side to the smart grid, and executing the step S6;
step S5: controlling the current to flow from the smart grid to the user side, and executing step S7;
step S6: extracting information of each time period during the electric quantity input period and corresponding load parameters from a load information table of the smart grid, calculating a contribution value of a user during the electric quantity input period to the smart grid, and updating the current contribution value of the user;
step S7: extracting the information of each time period during the electric quantity obtaining period and the corresponding load parameters from the intelligent power grid load information table, calculating the contribution value consumed during the electric quantity obtaining period of the user, judging whether the obtained electric quantity exceeds the free electric quantity, and calculating and updating the generated electric charge.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the smart grid load information table comprises information of each time period and load parameters corresponding to each time period, wherein the load parameters corresponding to each time period are power consumption numerical values of each time period or power price numerical values of each time period;
the load parameter value corresponding to the time period when the intelligent power grid load is larger, the contribution value corresponding to the electric quantity input to the intelligent power grid by the user is larger; when electric quantity is selected to be acquired from the smart grid, obtaining free electric quantity according to the contribution value, wherein the free electric quantity is converted more in a time period when the load of the smart grid is smaller;
electric quantity y delivered by user to smart gridiThe amount of electricity x available for free to the userjIt should satisfy:
Figure BDA0001446149210000061
wherein i represents a time period for the user to transmit power to the smart grid, j represents a time period for the user to obtain free electric quantity from the smart grid,i、jthe load parameters of the smart grid in the ith and the jth time periods are respectively, beta is a loss coefficient of electric quantity transmitted to the smart grid by a user, and beta is more than 0 and less than or equal to 1.
Further, the extracting, from the smart grid load information table, each time period information during the period of inputting the electric quantity and the corresponding load parameter thereof, calculating a contribution value of the user during the period of inputting the electric quantity to the smart grid, and updating the current contribution value of the user specifically includes:
step S601: acquiring the current time, and matching the time period T to which the current time belongs from the intelligent power grid load information tableCExtracting load parameters corresponding to each time period during the input electric quantityiDuring which the input power is recordedElectric quantity y transmitted from time slot user to smart gridiI denotes each time period during which the amount of electricity is input, and i is TC,TC+1,TC+2...；
Step S602: calculating the contribution value of the current power transmission of the user to the smart grid
Figure BDA0001446149210000062
According to the formula
Figure BDA0001446149210000063
Updating the current contribution value I of the user, wherein I0The contribution value is the existing contribution value before the current power transmission;
step S603: when the input power amount process ends and the calculation is completed, the process returns to step S3.
Further, the extracting, from the smart grid load information table, each time period information during the period of acquiring the electric quantity and the corresponding load parameter thereof, calculating a contribution value consumed during the period of acquiring the electric quantity by the user, and determining whether the acquired electric quantity exceeds the free electric quantity, wherein the calculating of the generated electric charge specifically includes:
step S701: acquiring the current time, matching the time period j to which the current time belongs from the intelligent power grid load information table, and extracting the load parameter corresponding to the j time periodjAnd recording the electric quantity x acquired by the user from the smart grid in the j time periodjWhen the time period is over or when the process of acquiring the electric quantity is over, the step S702 is executed;
step S702: calculating the free charge amount I/available to the user in the j time periodjAnd judging the electric quantity x acquired by the user in the j time periodjWhether the free charge amount I that can be enjoyed during the time period is exceeded or notjIf xj≤I/jIf yes, executing step S703, if not, executing step S704;
step S703: the electric quantity acquired by the user in the j time period does not exceed the free electric quantity, the electric charge is not generated, and the contribution value consumed by the user in the j time period isj·xjAnd according to the formula I ═ I0-j·xjUpdating the current contribution value I of the user, wherein，I0Obtaining the existing contribution value before the electric quantity for the current time period, and returning to the step S701;
step S704: the electric quantity acquired in the j time period exceeds the free electric quantity, and the non-free electric quantity is xj-I/jCalculating the electricity fee p (x) generated in the time period according to the electricity price p of the time periodj-I/j) And according to the formula F ═ F0+p·(xj-I/j) Updating the total electric charge F of the user, wherein F0The electricity charge generated before the electricity quantity is acquired for the time period, and the current contribution value I of the user is 0;
step S705: when the power acquiring process is finished and the calculation is completed, the process returns to step S3, otherwise, the process returns to step S701.
Further, the method also comprises the following steps:
when the calculation is finished, displaying the current contribution value of the user, the electricity fee information, the electricity transmission amount during the electricity input period and the electricity consumption amount during the electricity acquisition period;
and sending the current contribution value of the user, the electricity fee information, the electricity transmission amount during the electricity input period and the electricity consumption amount during the electricity acquisition period to the user intelligent terminal.
Drawings
Fig. 1 is a block diagram of an intelligent electric meter according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for charging a smart meter according to another embodiment of the present invention;
fig. 3 is a flowchart of a method for charging a smart meter according to another embodiment of the present invention;
fig. 4 is a flowchart of a method for charging a smart meter according to another embodiment of the present invention;
fig. 5 is a flowchart of a method for charging a smart meter according to another embodiment of the present invention.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
The invention breaks through the traditional one-way demand type power utilization mode, and can be used for users to select two modes of inputting electric quantity to the smart grid and acquiring the electric quantity from the smart grid. Therefore, a user can be stimulated to transmit power to the smart grid in a time period with large load of the smart grid, and electric quantity is acquired in a time period with small load of the smart grid, so that the load of the smart grid in a power utilization peak period is relieved.
The excitation principle of the invention is as follows:
dividing 24 hours a day into N time periods according to the load statistical condition of the intelligent power grid, wherein each time period is not necessarily equal in length, and the load parameters corresponding to each time period are recorded asiIn fact, the load parameter of the smart grid in each time slot can be represented by how much average power consumption in the time slot is or the electricity price of the time slot, and if the amount of electricity delivered to the smart grid by a user in the ith time slot is yi(yiNot less than 0), then
1) During the j-th time period (which occurs after the user transmits power to the smart grid), the free amount of electricity that the user can enjoy is xjThe two should satisfy the following basic relationship:
j·xj＝β·i·yi (1)
beta is a constant, beta is more than 0 and less than or equal to 1, and represents a loss coefficient of electric quantity transmitted to the smart grid by a user, a specific numerical value is determined after statistics of an operator, but beta is not suitable to be too small, otherwise, the function of exciting the user to transmit electricity to the power grid is not achieved. In which the right part is betai·yiThe user is called a contribution value to the smart grid and is marked as I, and the value of I is determined by the power transmission time period and the power transmission amount, namely, the more the power transmission amount is, the greater the contribution to the smart grid is in the time period when the load of the smart grid is larger.
As shown in the formula (1), the free electricity amount x that the user can enjoy in the j-th time periodj＝I/j＝yi·βi/j. If beta.i＞jI.e. the j-th periodThe load of the smart grid is smaller than that of the ith time slot, so that x is possiblej＞yiI.e. the free charge x available to the user during the jth time periodjThe electric quantity y input to the smart grid in the ith time period can be largeri(ii) a If beta.i≤jThen there is xj≤yi. Therefore, the user should choose to transmit power to the smart grid during the peak period of power utilization or the time period with a large load, and then obtain more free power in the time period with a smaller load of the smart grid, which is the way of applying the method to stimulate the user.
2) And if the user transmits the electric quantity to the smart grid in a plurality of time periods, specifically selecting which time period or which time periods, and determining by the user according to the load size of the smart grid in each time period, the capacity of the power generation equipment, the energy storage equipment, the current energy storage and the like. The electric quantity y delivered by the user to the smart gridiThe amount of electricity x available for free to the userj，yi≥0,xjNot less than 0, and the following should be satisfied:
Figure BDA0001446149210000091
where i represents the time period for the user to transmit power to the smart grid, and j represents the time period for the user to obtain free power from the smart grid, respectively.
The following examples are specifically applied in accordance with the principles described above.
Fig. 1 is a block diagram of an intelligent electric meter according to an embodiment of the present invention;
optionally, as an embodiment of the present invention, as shown in fig. 1, a smart meter is characterized by including:
the wireless communication module is used for acquiring a smart grid load information table from a smart grid information center;
the storage module is used for storing the intelligent power grid load information table;
the selection module is used for providing a user selection power supply and transmission mode, wherein the power supply and transmission mode comprises two modes of inputting electric quantity to the smart grid and acquiring the electric quantity from the smart grid; specifically, the user can select the power supply and transmission mode through two ways, the first way is: directly selecting a power supply mode from the selection module, wherein the second mode is as follows: the user selects a power supply and transmission mode from the intelligent terminal, sends the power supply and transmission mode to the wireless communication module of the intelligent electric meter, and transmits the power supply and transmission mode to the selection module through the wireless communication module;
the current control module is used for controlling current to flow from the user side to the smart grid and sending a first signal to the charging module when a mode of inputting electric quantity to the smart grid is selected; the intelligent power grid charging system is also used for controlling current to flow from the intelligent power grid to the user side and sending a second signal to the charging module when a mode of acquiring electric quantity from the intelligent power grid is selected;
the charging module is used for extracting information of each time period and corresponding load parameters during the period of inputting the electric quantity from a load information table of the smart grid according to the first signal, calculating a contribution value of a user during the period of inputting the electric quantity to the smart grid and updating a current contribution value of the user, wherein the contribution value during the period of inputting the electric quantity is the sum of products of the electric quantity input to the smart grid by the user in each time period and the corresponding load parameters in each time period;
and the intelligent power grid load information table is also used for extracting information of each time period and corresponding load parameters during the period of acquiring the electric quantity from the intelligent power grid load information table according to the second signal, calculating a contribution value consumed during the period of acquiring the electric quantity by the user, judging whether the acquired electric quantity exceeds free electric quantity or not, and calculating generated electric charge, wherein the free electric quantity is obtained through conversion according to the contribution value.
Specifically, in the above embodiment, the control current flows in both directions between the smart grid and the user side, when the user transmits power to the smart grid, the user side may be a self-power-generating device, such as a solar panel, a small generator, or the like, or an energy storage device, such as a battery of an electric vehicle, that transmits power to the smart grid in a discharging manner, so as to obtain more free electric quantity in a time period (such as at night) when the load of the smart grid is small, and when the user obtains the electric quantity from the smart grid, the user side may be a lighting device, an electrical device, or the like.
In the embodiment, the traditional one-way demand type power utilization mode is broken through, a user can select two modes of inputting electric quantity to the smart grid and acquiring the electric quantity from the smart grid, and the user can input redundant electric quantity into the smart grid through the smart meter so as to acquire certain fee-free electric quantity when the power is needed.
Specifically, in the above embodiment, the smart grid load information table includes information of each time period and a load parameter corresponding to each time period, where the load parameter corresponding to each time period is an electricity consumption value of each time period or an electricity price value of each time period;
the load parameter value corresponding to the time period when the intelligent power grid load is larger, the contribution value corresponding to the electric quantity input to the intelligent power grid by the user is larger; when electric quantity is selected to be acquired from the smart grid, obtaining free electric quantity according to the contribution value, wherein the free electric quantity is converted more in a time period when the load of the smart grid is smaller;
electric quantity y delivered by user to smart gridiThe amount of electricity x available for free to the userjIt should satisfy:
Figure BDA0001446149210000111
wherein i represents a time period for the user to transmit power to the smart grid, j represents a time period for the user to obtain free electric quantity from the smart grid,i、jthe load parameters of the smart grid in the ith and the jth time periods are respectively, beta is a loss coefficient of electric quantity transmitted to the smart grid by a user, and beta is more than 0 and less than or equal to 1.
In the above embodiment, the user selects to transmit power to the smart grid in the smart grid power utilization peak period or the time period with a large load, and then can obtain more free electric quantity in the time period with a small load of the smart grid, so that the user can be stimulated to transmit power in the smart grid power utilization peak period or the time period with a large load, the load of the smart grid is reduced, the load of the smart grid is smoothed, and the consumption capacity of the smart grid is improved.
Optionally, as an embodiment of the present invention, the smart meter further includes a clock module; the clock module is used for providing current time information;
the charging module specifically comprises:
the extracting and recording unit is used for acquiring the current time from the clock module according to the first signal and matching the time period T to which the current time belongs from the intelligent power grid load information tableCExtracting load parameters corresponding to each time period during the input electric quantityiRecording the power transmission amount y of the user to the intelligent power grid in each time period during the input of the poweriI denotes each time period during which the amount of electric power is input, and i is TC,TC+1,TC+2, sending a first calculation instruction to the calculation unit when the input of the electric quantity is finished;
a calculating unit, configured to calculate, according to the first calculation instruction, a contribution value of the current power transmission of the user to the intelligent power grid
Figure BDA0001446149210000112
And according to the formula
Figure BDA0001446149210000113
Updating the current contribution value I of the user, wherein I0The contribution value is the existing contribution value before the current power transmission;
the extracting and recording unit is further used for acquiring the current time from the clock module according to the second signal and matching the time period T to which the current time belongs from the intelligent power grid load information tableCExtracting load parameters corresponding to each time period during electric quantity acquisitionjRecording the electric quantity x acquired from the smart grid by the user in each time period during the electric quantity acquisition periodjJ denotes each time period during which the amount of electric power is input, and j is TC,TC+1,TC+2 …, respectively sending second calculation instructions to the calculation unit when each time period ends during the acquisition of the electric quantity and when the acquisition process of the electric quantity ends; "the end of each time period respectively sends a second calculation instruction to the calculation unit" is: when each time period is over, the contribution value consumed by the user needs to be calculated, so that a second calculation instruction needs to be sent to the calculation unit; if the process of acquiring electric quantity is ended in a certain time period, the consumption of the user needs to be calculatedA contribution value, therefore a second calculation instruction is sent to the calculation unit;
the calculating unit is further used for calculating the free electric quantity I-j，j＝TC,TC+1,TC+2., and judge xj≤I/jIf yes, the electric quantity acquired in the j time period does not exceed the free electric quantity, no electric charge is generated, and the contribution value consumed by the user in the j time period isj·xjAnd according to the formula I ═ I0-j·xjUpdating the current contribution value I of the user, wherein I0Acquiring the contribution value existing before the electric quantity for the j time period;
if xj≤I/jIf not, the electric quantity x acquired in the j time periodiThe non-free electricity quantity exceeds the free electricity quantity and is xj-I/jAnd according to the formula p (x)j-I/j) Calculating the electricity charge generated by acquiring the electricity quantity in the j time period, wherein p is the electricity price of the j time period, and F is the formula0+p·(xj-I/j) Updating the total electric charge F of the user, wherein F0The current contribution value I of the user is 0 for the electricity fee that has been generated before the electricity amount is acquired for the j-th time period.
The intelligent electric meter also has the function of clearing the paid electric charge, and if the user submits the monthly electric charge, the wireless communication module acquires and pays the electric charge F*The charging module is led in, and the electric charge F paid up is subtracted from the generated electric charge F*The generated electricity fee is updated as follows: f ═ F-F*。
In the above embodiment, the contribution value of the user to the power transmission of the smart grid is calculated through the power transmission amount of the user to the smart grid, the load parameter is larger, the contribution value is larger, the free power is obtained through the contribution value, and the more charge-free power can be obtained in the time period when the load of the smart grid is smaller, so that the user can be stimulated to transmit power to the smart grid in the peak power utilization period and use power in the small load period, and the load of the smart grid is smoothed.
Optionally, as an embodiment of the present invention, the smart meter further includes a display module;
and the display module is used for displaying the intelligent power grid load information table, the current contribution value of the user, the electricity fee information, the power transmission amount during the period of inputting the electricity quantity and the power consumption amount during the period of acquiring the electricity quantity.
In the embodiment, a user can select a power supply and transmission mode conveniently according to the intelligent power grid load information table, and reference data are provided for the user.
Optionally, as an embodiment of the present invention, the wireless communication module is further configured to perform information interaction with the user intelligent terminal, where the information interaction includes receiving a power supply and transmission mode selected by the user from the intelligent terminal, sending the power supply and transmission mode to the selection module, and sending the current contribution value of the user, the power rate information, the power transmission amount during the power input period, and the power consumption amount during the power acquisition period to the user intelligent terminal.
In the above embodiment, information interaction can be performed with a user intelligent terminal (such as a smart phone), so that a user can conveniently view information from the intelligent terminal (such as a smart phone) and remotely select a power supply and transmission mode.
Further, the wireless communication module is further configured to acquire time information from a smart grid and send the time information to the clock module, so that the clock module performs time correction.
Alternatively, as another embodiment of the present invention, as shown in fig. 2, a charging method for a smart meter includes:
step S1: acquiring a smart grid load information table from a smart grid information center;
step S2: saving the intelligent power grid load information table;
step S3: acquiring a power supply and transmission mode selected by a user, wherein the power supply and transmission mode comprises two modes of inputting power to the smart grid and acquiring power from the smart grid, when the mode of inputting power to the smart grid is selected, executing step S4, and when the mode of acquiring power from the smart grid is selected, executing step S5;
step S4: controlling the current to flow from the user side to the smart grid, and executing the step S6;
step S5: controlling the current to flow from the smart grid to the user side, and executing step S7;
step S6: extracting information of each time period during the electric quantity input period and corresponding load parameters from a load information table of the smart grid, calculating a contribution value of a user during the electric quantity input period to the smart grid, and updating the current contribution value of the user;
step S7: extracting the information of each time period during the electric quantity obtaining period and the corresponding load parameters from the intelligent power grid load information table, calculating the contribution value consumed during the electric quantity obtaining period of the user, judging whether the obtained electric quantity exceeds the free electric quantity, and calculating and updating the generated electric charge.
Optionally, as another embodiment of the present invention, the smart grid load information table includes information of each time period and a load parameter corresponding to each time period, where the load parameter corresponding to each time period is an electricity consumption value of each time period or an electricity price value of each time period;
the load parameter value corresponding to the time period when the intelligent power grid load is larger, the contribution value corresponding to the electric quantity input to the intelligent power grid by the user is larger; when electric quantity is selected to be acquired from the smart grid, obtaining free electric quantity according to the contribution value, wherein the free electric quantity is converted more in a time period when the load of the smart grid is smaller;
electric quantity y delivered by user to smart gridiThe amount of electricity x available for free to the userjIt should satisfy:
Figure BDA0001446149210000141
wherein i represents a time period for the user to transmit power to the smart grid, j represents a time period for the user to obtain free electric quantity from the smart grid,i、jthe load parameters of the smart grid in the ith and the jth time periods are respectively, beta is a loss coefficient of electric quantity transmitted to the smart grid by a user, and beta is more than 0 and less than or equal to 1.
Fig. 3 is a flowchart of a method for charging a smart meter according to another embodiment of the present invention;
as an alternative embodiment of the present invention, as shown in fig. 3, the calculating a contribution value of the user during the period of inputting the electric quantity to the smart grid, and updating the current contribution value of the user specifically includes:
step S601: acquiring the current time, and matching the time period T to which the current time belongs from the intelligent power grid load information tableCExtracting load parameters corresponding to each time period during the input electric quantityiRecording the power transmission amount y of the user to the smart grid in each time period during the input power periodiI denotes each time period during which the amount of electricity is input, and i is TC,TC+1,TC+2...；
Step S602: calculating the contribution value of the current power transmission of the user to the smart grid
Figure BDA0001446149210000142
According to the formula
Figure BDA0001446149210000143
Updating the current contribution value I of the user, wherein I0The contribution value is the existing contribution value before the current power transmission;
step S603: when the input power amount process ends and the calculation is completed, the process returns to step S3.
Fig. 4 is a flowchart of a method for charging a smart meter according to another embodiment of the present invention;
as an alternative, as another embodiment of the present invention, as shown in fig. 4, the calculating of the contribution value consumed during the period when the user acquires the electric quantity and determining whether the acquired electric quantity exceeds the free electric quantity may specifically include:
step S701: acquiring the current time, matching the time period j to which the current time belongs from the intelligent power grid load information table, and extracting the load parameter corresponding to the j time periodjAnd recording the electric quantity x acquired by the user from the smart grid in the j time periodjWhen the time period is over or when the process of acquiring the electric quantity is over, the step S702 is executed;
step S702: calculating the free charge amount I/available to the user in the j time periodjAnd judging the electric quantity x acquired by the user in the j time periodjWhether the free charge amount I that can be enjoyed during the time period is exceeded or notjIf xj≤I/jIf yes, executing step S703, if not, executing step S704;
step S703: the electric quantity acquired by the user in the j time period does not exceed the free electric quantity, the electric charge is not generated, and the contribution value consumed by the user in the j time period isj·xjAnd according to the formula I ═ I0-j·xjUpdating the current contribution value I of the user, wherein I0Obtaining the existing contribution value before the electric quantity for the current time period, and returning to the step S701;
step S704: the electric quantity acquired in the j time period exceeds the free electric quantity, and the non-free electric quantity is xj-I/jCalculating the electricity fee p (x) generated in the time period according to the electricity price p of the time periodj-I/j) And according to the formula F ═ F0+p·(xj-I/j) Updating the total electric charge F of the user, wherein F0The electricity charge generated before the electricity quantity is acquired for the time period, and the current contribution value I of the user is 0;
step S705: when the power acquiring process is finished and the calculation is completed, the process returns to step S3, otherwise, the process returns to step S701.
The intelligent electric meter also has the function of clearing the paid electric charge, and if the user submits the monthly electric charge, the wireless communication module acquires and pays the electric charge F*The charging module is introduced to subtract the upper payment electric charge F from the generated electric charge F*The generated electricity fee is updated as follows: f ═ F-F*。
Optionally, as another embodiment of the present invention, the method further includes the steps of:
when the calculation is finished, displaying the current contribution value of the user, the electricity fee information, the electricity transmission amount during the electricity input period and the electricity consumption amount during the electricity acquisition period;
and sending the current contribution value of the user, the electric charge information, the power transmission amount during the electric quantity input period and the power consumption amount during the electric quantity acquisition period to the user intelligent terminal.
The user obtains the electric quantity from the smart grid, namely, a certain contribution value is consumed, if the current electric quantity does not exceed the free electric quantity converted from the contribution value, payment is not needed, and if the current electric quantity exceeds the free electric quantity, payment is needed for the electric quantity exceeding the free part.
Fig. 5 is a flowchart of a method for charging a smart meter according to another embodiment of the present invention.
As shown in fig. 5, the overall implementation steps are described as follows:
step SS 1: acquiring a smart grid load information table from a smart grid;
step SS 2: saving the intelligent power grid load information table;
step SS 3: acquiring a power supply and transmission mode selected by a user, executing the step SS4 when the mode of inputting power to the smart grid is selected, and executing the step SS8 when the mode of acquiring power from the smart grid is selected;
step SS 4: controlling current to flow from the user side to the smart grid;
step SS 5: acquiring the current time, and matching the time period T to which the current time belongs from the intelligent power grid load information tableCExtracting load parameters corresponding to each time period during the input electric quantityiRecording the power transmission amount y of the user to the smart grid in each time period during the input of the poweriI denotes the respective time periods during which the amount of power is input, i ═ TC,TC+1,TC+2...；
Step SS 6: calculating the contribution value of the current power transmission of the user to the smart grid
Figure BDA0001446149210000161
And according to the formula
Figure BDA0001446149210000162
Updating the current contribution value I of the user, wherein I0The contribution value is the existing contribution value before the current power transmission;
step SS 7: when the process of inputting the electric quantity is finished and the calculation is finished, displaying the current contribution value of the user, the electric charge information, the power transmission quantity during the period of inputting the electric quantity and the power consumption quantity during the period of acquiring the electric quantity, and returning to the step SS 3;
step SS 8: controlling current to flow from the smart grid to the user side;
step SS 9: acquiring the current time, matching the time period j to which the current time belongs from the intelligent power grid load information table, and extracting the load parameter corresponding to the j time periodjAnd recording the electric quantity x acquired by the user from the smart grid in the j time periodjWhen the time period is over or when the process of acquiring the electric quantity is over;
step SS 10: calculating the free charge amount I/available to the user in the j time periodjAnd judging the electric quantity x acquired by the user in the j time periodjWhether the free charge amount I that can be enjoyed during the time period is exceeded or notjIf xj≤I/jIf true, go to step SS11, if false, go to step SS 12;
step SS 11: the electric quantity acquired by the user in the j time period does not exceed the free electric quantity, the electric charge is not generated, and the contribution value consumed by the user in the j time period isj·xjAnd according to the formula I ═ I0-j·xjUpdating the current contribution value I of the user, wherein I0The existing contribution value before the electric quantity is obtained for the current time period, and the step SS9 is returned;
step SS 12: the electric quantity acquired in the j time period exceeds the free electric quantity, and the non-free electric quantity is xj-I/jCalculating the electricity fee p (x) generated in the time period according to the electricity price p of the time periodj-I/j) And according to the formula F ═ F0+p·(xj-I/j) Updating the total electric charge F of the user, wherein F0The electricity charge generated before the electricity quantity is acquired for the time period, and the current contribution value I of the user is 0;
step SS 13: judging whether the process of acquiring the electric quantity is finished or not, if not, returning to the step SS9, otherwise, executing the step SS 14;
step SS14, when the process of obtaining electric quantity is finished and the calculation is finished, displaying the current contribution value of the user, the electric charge information, the electric quantity of transmission during the period of inputting electric quantity and the electric quantity of consumption during the period of obtaining electric quantity, and returning to step SS 3;
in the above integrally implemented steps, the step SS3 can be replaced by: and wirelessly receiving the power supply and transmission mode selected by the user from the intelligent terminal.
The practical application of the present invention is illustrated by the following specific examples:
table 1 is a load information table of a certain cell 1 counted by the smart grid;
TABLE 1
Figure BDA0001446149210000171
Figure BDA0001446149210000181
Table 2 is a load information table of the smart grid for a certain cell 2;
TABLE 2
Figure BDA0001446149210000182
The average power consumption in different time periods in table 1 and the electricity prices in different time periods in table 2 can both reflect the cell load in different time periods.
Assuming that a user in a certain cell uses the smart meter of the present invention, the wireless communication module of the smart meter obtains the load information table (i.e. the average power consumption information table) in table 1, and the user can know from the display of the smart meter or from the load information table displayed by the smart terminal: average power usage at 6 th time period (13-14 hours)62735kWh, which is the peak electricity usage period of the day, and the average electricity usage during the 15 th time period (0-5 hours)15810kWh, this period belongs to night, with minimum load on the grid. The user selects to discharge the electric vehicle in the 6 th time period and detects the power transmission amount y in the time period at the end of the time period62Wh, the contribution β · a of the user to the smart grid in the 6 th slot6·y6When the contribution value I of the user is 4923, the contribution value I of the user is updated as follows: i ═ I0+β·6·y6(initial use of the Smart electric Meter, I0Is 0), assuming that the transmission loss coefficient β is 0.9, and I is calculated as 4923, the user can use the free charge amount I/based on the 15 th time period (0-5), i.e., the time period with the minimum load15＝4923/810＝6.08Wh。
If the user selects to charge the electric automobile in the 15 th time period (0-5), the actually used electric quantity x of the time period is detected at the end of the time period154Wh, judged x15≤I/15When the user does not generate electricity charge 6.08, the contribution I balance of the user to the smart grid is updated as follows: i ═ I0-β·15·x′。
If the user transmits power to the smart grid again at 8-9 hours (time slot 1) of the next day, the smart electric meter detects the power transmission amount y of the time slot at the end of the time slot1When the contribution I of the user to the smart grid is updated to 1.5 Wh: i ═ I0+β·1·y1＝1683+0.9×1500×1.5＝3708。
If the user uses electricity in the 9 th time slot (16-17 hours) of the next day, the smart meter judges that the point current flows from the smart grid to the user, and detects the actually used electricity x in the time slot at the end of the time slot94Wh, judged x9＞I/93708/1642, the free electricity of the user is used up, and the user generates electricity fee, and the non-free electricity is: x is the number of9-I/94-2.26-1.74 Wh, updating the electricity fee F according to the electricity price p (priced by the operator), F0+p·(x'-I/cur)，F0Is 0, when the user has generated an electricity charge F ═ p · (x' -I ·9) And the contribution balance I to the smart grid is 0 when the value is 1.74. p.
The user then transmits power to the smart grid or obtains power from the smart grid, and the method follows this reasoning.
If the user uses the intelligent electric meter and the wireless communication module thereof to obtain the intelligent electric network load information which is the intelligent electric network load information table shown in the table 2, the processing method is not changed, and the load parameters of the intelligent electric network at different time periods correspond to the electricity price.
The invention breaks through the traditional one-way demand type power utilization mode, and can be used for users to select two modes of inputting electric quantity to the smart grid and acquiring the electric quantity from the smart grid. Therefore, a user can be stimulated to transmit power to the smart grid in a time period with large load of the smart grid, and electric quantity is acquired in a time period with small load of the smart grid, so that the load of the smart grid in a power utilization peak period is relieved, and the load of the smart grid is smoothed.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (7)

1. A smart meter, comprising:
the wireless communication module is used for acquiring a smart grid load information table from a smart grid information center;
the storage module is used for storing the intelligent power grid load information table;
the selection module is used for providing a user selection power supply and transmission mode, wherein the power supply and transmission mode comprises two modes of inputting electric quantity to the smart grid and acquiring the electric quantity from the smart grid;
the current control module is used for controlling current to flow from the user side to the smart grid and sending a first signal to the charging module when a mode of inputting electric quantity to the smart grid is selected; the intelligent power grid charging system is also used for controlling current to flow from the intelligent power grid to the user side and sending a second signal to the charging module when a mode of acquiring electric quantity from the intelligent power grid is selected;
the charging module is used for extracting information of each time period in the period of inputting the electric quantity and corresponding load parameters thereof from a load information table of the smart grid according to the first signal, calculating a contribution value of a user in the period of inputting the electric quantity to the smart grid and updating the current contribution value of the user, wherein the contribution value in the period of inputting the electric quantity is the sum of products of the electric quantity input to the smart grid by each time period of the user and the load parameters corresponding to each time period; the intelligent electric meter also comprises a clock module; the clock module is used for providing current time information;
the charging module specifically comprises:
the extracting and recording unit is used for acquiring the current time from the clock module according to the first signal and matching the time period T to which the current time belongs from the intelligent power grid load information tableCExtracting load parameters corresponding to each time period during the input electric quantityiRecording the power transmission amount y of the user to the smart grid in each time period during the input of the poweriI denotes each time period during which the amount of electric power is input, and i is TC,TC+1,TC+2, sending a first calculation instruction to the calculation unit when the input of the electric quantity is finished;
a calculating unit, configured to calculate, according to the first calculation instruction, a contribution value of the current power transmission of the user to the smart grid
Figure FDA0002718348730000011
And according to the formula
Figure FDA0002718348730000012
Updating the current contribution value I of the user, wherein I0Beta is a loss coefficient of the electric quantity transmitted to the smart grid by the user, wherein beta is more than 0 and less than or equal to 1;
the extracting and recording unit is further used for acquiring the current time from the clock module according to the second signal and matching the time period T to which the current time belongs from the intelligent power grid load information tableCExtracting load parameters corresponding to each time period during electric quantity acquisitionjRecording the electric quantity x acquired from the smart grid by the user in each time period during the electric quantity acquisition periodjJ denotes each time period during which the amount of electric power is input, and j is TC,TC+1,TC+2, respectively sending the first to the calculating unit when each time period ends and when the process of acquiring the electric quantity ends during the process of acquiring the electric quantityCalculating an instruction;
the calculating unit is also used for calculating the free electric quantity I-j，j＝TC,TC+1,TC+2., and judge xj≤I/jIf yes, the electric quantity acquired in the j time period does not exceed the free electric quantity, no electric charge is generated, and the contribution value consumed by the user in the j time period isj·xjAnd according to the formula I ═ I0-j·xjUpdating the current contribution value I of the user, wherein I0Acquiring the contribution value existing before the electric quantity for the j time period;
if xj≤I/jIf not, the electric quantity x acquired in the j time periodjThe non-free electricity quantity exceeds the free electricity quantity and is xj-I/jAnd according to the formula p (x)j-I/j) Calculating the electricity charge generated by acquiring the electricity quantity in the j time period, wherein p is the electricity price of the j time period, and F is the formula0+p·(xj-I/j) Updating the total electric charge F of the user, wherein F0The electricity charge generated before the electricity quantity is acquired for the j-th time period, and the current contribution value I of the user is 0;
and the intelligent power grid load information table is also used for extracting information of each time period and corresponding load parameters during the period of acquiring the electric quantity from the intelligent power grid load information table according to the second signal, calculating a contribution value consumed during the period of acquiring the electric quantity by the user, judging whether the acquired electric quantity exceeds free electric quantity or not, and calculating generated electric charge, wherein the free electric quantity is obtained through conversion according to the contribution value.
2. The smart electric meter according to claim 1, wherein the smart grid load information table includes information of each time period and a load parameter corresponding to each time period, wherein the load parameter corresponding to each time period is an electric quantity value of each time period or an electricity price value of each time period;
the load parameter value corresponding to the time period when the intelligent power grid load is larger, the contribution value corresponding to the electric quantity input to the intelligent power grid by the user is larger; when electric quantity is selected to be acquired from the smart grid, obtaining free electric quantity according to the contribution value, wherein the free electric quantity is converted more in a time period when the load of the smart grid is smaller;
electric quantity y delivered by user to smart gridiFree electric quantity x acquired from smart grid by userjIt should satisfy:
Figure FDA0002718348730000031
wherein i represents a time period for the user to transmit power to the smart grid, j represents a time period for the user to obtain free electric quantity from the smart grid,i、jthe load parameters of the smart grid in the ith and the jth time periods are respectively, beta is a loss coefficient of electric quantity transmitted to the smart grid by a user, and beta is more than 0 and less than or equal to 1.
3. The smart meter of claim 1, further comprising a display module;
and the display module is used for displaying the intelligent power grid load information table, the current contribution value of the user, the electric charge information, the power transmission amount during the period of inputting the electric quantity and the power consumption amount during the period of acquiring the electric quantity.
4. The smart meter of any one of claims 1-3, wherein the wireless communication module is further configured to perform information interaction with the user smart terminal, the information interaction includes receiving a power supply and transmission mode selected by the user from the smart terminal, transmitting the power supply and transmission mode to the selection module, and transmitting the current contribution value of the user, the power rate information, the power consumption during the power input period, and the power consumption during the power acquisition period to the user smart terminal.
5. A charging method of an intelligent ammeter is characterized by comprising the following steps:
step S1: acquiring a smart grid load information table from a smart grid information center;
step S2: saving the intelligent power grid load information table;
step S3: acquiring a power supply and transmission mode selected by a user, wherein the power supply and transmission mode comprises two modes of inputting power to the smart grid and acquiring power from the smart grid, when the mode of inputting power to the smart grid is selected, executing step S4, and when the mode of acquiring power from the smart grid is selected, executing step S5;
step S4: controlling the current to flow from the user side to the smart grid, and executing the step S6;
step S5: controlling the current to flow from the smart grid to the user side, and executing step S7;
step S6: extracting information of each time period during the electric quantity input period and corresponding load parameters from a load information table of the smart grid, calculating a contribution value of a user during the electric quantity input period to the smart grid, and updating the current contribution value of the user; the method includes the steps of extracting information of each time period during electric quantity input from a load information table of the smart grid and load parameters corresponding to the information of each time period, calculating a contribution value of a user during electric quantity input to the smart grid, and updating a current contribution value of the user, and specifically includes the following steps:
step S601: acquiring the current time, and matching the time period T to which the current time belongs from the intelligent power grid load information tableCExtracting load parameters corresponding to each time period during the input electric quantityiRecording the power transmission amount y of the user to the smart grid in each time period during the input of the poweriI denotes each time period during which the amount of electric power is input, and i is TC,TC+1,TC+2...；
Step S602: calculating the contribution value of the current power transmission of the user to the smart grid
Figure FDA0002718348730000041
And according to the formula
Figure FDA0002718348730000042
Updating the current contribution value I of the user, wherein I0Beta is a loss coefficient of the electric quantity transmitted to the smart grid by the user, wherein beta is more than 0 and less than or equal to 1;
step S603: when the input power amount process is finished and the calculation is completed, returning to step S3;
step S7: extracting information of each time period during the electric quantity obtaining period and corresponding load parameters from a load information table of the smart power grid, calculating a contribution value consumed during the electric quantity obtaining period of a user, judging whether the obtained electric quantity exceeds free electric quantity, and calculating and updating generated electric charge; the method comprises the steps of extracting information of each time period during the electric quantity obtaining period and corresponding load parameters from a smart grid load information table, calculating a contribution value consumed during the electric quantity obtaining period of a user, and judging whether the obtained electric quantity exceeds free electric quantity, wherein the calculation of the generated electric charge specifically comprises the following steps:
step S701: acquiring the current time, matching the time period j to which the current time belongs from the intelligent power grid load information table, and extracting the load parameter corresponding to the j time periodjAnd recording the electric quantity x acquired by the user from the smart grid in the j time periodjWhen the time period is over or when the power acquiring process is over, executing step S702;
step S702: calculating the free charge amount I/available to the user in the j time periodjAnd judging the electric quantity x acquired by the user in the j time periodjWhether the free charge amount I that can be enjoyed during the time period is exceeded or notjIf xj≤I/jIf yes, executing step S703, if not, executing step S704;
step S703: the electric quantity acquired by the user in the j time period does not exceed the free electric quantity, the electric charge is not generated, and the contribution value consumed by the user in the j time period isj·xjAnd according to the formula I ═ I0-j·xjUpdating the current contribution value I of the user, wherein I0Acquiring the existing contribution value before the electric quantity for the j time period, and returning to the step S705;
step S704: the electric quantity acquired in the j time period exceeds the free electric quantity, and the non-free electric quantity is xj-I/jCalculating the electricity fee p (x) generated in the time period according to the electricity price p of the time periodj-I/j) And according to the formula F ═ F0+p·(xj-I/j) Updating the total electric charge F of the user, wherein F0The electricity charge generated before the electricity quantity is acquired for the time period, and the current contribution value I of the user is 0;
step S705: when the power acquiring process is finished and the calculation is completed, the process returns to step S3, otherwise, the process returns to step S701.
6. The charging method for the smart meter according to claim 5, wherein the smart grid load information table includes information of each time period and a load parameter corresponding to each time period, wherein the load parameter corresponding to each time period is an electricity consumption value of each time period or an electricity price value of each time period;
the load parameter value corresponding to the time period when the intelligent power grid load is larger, the contribution value corresponding to the electric quantity input to the intelligent power grid by the user is larger; when electric quantity is selected to be acquired from the smart grid, obtaining free electric quantity according to the contribution value, wherein the free electric quantity is converted more in a time period when the load of the smart grid is smaller;
electric quantity y delivered by user to smart gridiFree electric quantity x acquired from smart grid by userjIt should satisfy:
Figure FDA0002718348730000051
wherein i represents a time period for the user to transmit power to the smart grid, j represents a time period for the user to obtain free electric quantity from the smart grid,i、jthe load parameters of the smart grid in the ith and the jth time periods are respectively, beta is a loss coefficient of electric quantity transmitted to the smart grid by a user, and beta is more than 0 and less than or equal to 1.
7. The billing method of the smart meter of claim 5, further comprising the steps of:
when the calculation is finished, displaying the current contribution value of the user, the electric charge information, the power transmission amount during the period of inputting the electric quantity and the power consumption amount during the period of acquiring the electric quantity;
and sending the current contribution value of the user, the electric charge information, the power transmission amount during the electric quantity input period and the power consumption amount during the electric quantity acquisition period to the user intelligent terminal.
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