CN110601223B - Power adjusting method and device, electronic equipment and storage medium - Google Patents
Power adjusting method and device, electronic equipment and storage medium Download PDFInfo
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Abstract
The application provides a power regulation method and device, electronic equipment and a storage medium, and relates to the technical field of microgrid control. Wherein, the method can be applied to a controller in a micro-grid system, the micro-grid system comprises a grid-connected point, a plurality of grid devices and a plurality of controllers, one controller corresponds to one grid device, the controllers are electrically connected with the corresponding grid device, the controllers are electrically connected with the grid-connected point, the method can determine a first normalization coefficient of the grid-connected point target power corresponding to the grid equipment in a preset time period through a controller, and determining the grid-connected point target power of the power grid equipment according to the first normalization coefficient of the grid-connected point target power of the power grid equipment and the system power limit value, so that each controller can timely adjust the target power of the grid-connected point of each power grid device under different power rates of the power grid according to the preset time period, under the condition that the operation of the micro-grid system is not more than the system power limit value, the economic operation of the micro-grid system can be realized.
Description
Technical Field
The present disclosure relates to the field of microgrid control technologies, and in particular, to a power adjustment method and apparatus, an electronic device, and a storage medium.
Background
At present, a micro-grid system can store electric energy after photovoltaic power generation, intelligently interact with a public power grid according to requirements, can realize two different operation modes of grid connection and grid disconnection, not only realizes clean energy power supply, but also can relieve the impact on a regional power grid when high-power, capacitive and inductive load large-current charging is carried out.
In the prior art, when a micro-grid system runs, the running power exceeds the distribution capacity, and a cooperative scheduling strategy is usually adopted to perform coordination control among the micro-grid systems.
However, the existing micro-grid system does not consider the economic operation of the system under the condition that the power distribution capacity of the power grid is limited.
Disclosure of Invention
An object of the present application is to provide a power adjusting method, device, electronic device and storage medium, which can implement economic operation of a microgrid system when the power distribution capacity of the microgrid is limited, in order to overcome the above-mentioned shortcomings in the prior art.
In order to achieve the above purpose, the technical solutions adopted in the embodiments of the present application are as follows:
in a first aspect, an embodiment of the present application provides a power adjustment method, which is applied to a controller in a micro-grid system, where the micro-grid system includes a grid-connected point, multiple grid devices, and multiple controllers, where one controller corresponds to one grid device, and the controller is electrically connected to the corresponding grid device, and the multiple controllers are electrically connected to the grid-connected point, and the method includes: the method comprises the steps that a controller determines a first normalization coefficient of grid-connected point target power corresponding to grid equipment in a preset time period, wherein the preset time period comprises a peak time period, a flat time period and a valley time period; the controller determines the grid-connected point target power of the power grid equipment according to a first normalization coefficient of the grid-connected point target power of the power grid equipment and a system power limit value; and the controller controls the power grid equipment to adjust the grid-connected point target power of the power grid equipment according to the preset time period according to the incidence relation between the preset time period and the grid-connected point target power of the power grid equipment.
Optionally, the method further includes: the method comprises the steps that a controller obtains the operation power of a grid-connected point in a current preset period and the operation power of power grid equipment in a preset time period, and judges whether the operation power of the grid-connected point and the target power of the grid-connected point of the power grid equipment meet a preset relation or not; if the preset period does not meet the preset period requirement, the controller determines the operating power of the power grid equipment in the next preset period within the preset period according to the operating power of the grid-connected point of the current preset period within the preset period, the target power of the grid-connected point of the power grid equipment and the operating power of the power grid equipment.
Optionally, the determining whether the grid-connected point operating power and the grid-connected point target power of the power grid device satisfy a preset relationship includes: the controller normalizes the operation power of the grid-connected point to obtain a normalization coefficient of the operation power of the grid-connected point after normalization; the controller judges whether the grid-connected point operating power and the grid-connected point target power of the power grid equipment meet a preset relation or not according to the normalization coefficient of the grid-connected point operating power and the first normalization coefficient of the grid-connected point target power of the power grid equipment.
Optionally, the determining, by the controller, the operating power of the power grid device in a next preset period within a preset time period according to the operating power of the grid-connected point in the current preset period within the preset time period, the target power of the grid-connected point of the power grid device, and the operating power of the power grid device, includes: the controller is used for carrying out normalization processing on the operating power of the power grid equipment to obtain a normalization coefficient of the operating power of the power grid equipment after the normalization processing; the controller determines a normalization coefficient of the operating power of the power grid equipment in the next preset period within a preset time period according to the normalization coefficient of the operating power of the grid-connected point, a first normalization coefficient of the target power of the grid-connected point of the power grid equipment and the normalization coefficient of the operating power of the power grid equipment; and the controller determines the operating power of the power grid equipment in the next preset period in the preset period according to the normalization coefficient of the operating power of the power grid equipment in the next preset period in the preset period and the system power limit value.
Optionally, the determining whether the grid-connected point operating power and the grid-connected point target power of the power grid device satisfy a preset relationship includes: if so, the controller takes the operating power of the power grid equipment in the current preset period in the preset time period as the operating power of the power grid equipment in the next preset period in the preset time period.
Optionally, the controller determines the grid-connected point target power of the power grid device according to the first normalization coefficient of the grid-connected point target power of the power grid device and the system power limit, and further includes: the controller determines a second normalization coefficient of the grid-connected point target power of the power grid equipment according to the preset priority of the corresponding power grid equipment; the controller determines the grid-connected point target power of the power grid equipment according to a first normalization coefficient of the grid-connected point target power of the power grid equipment, a second normalization coefficient of the grid-connected point target power of the power grid equipment and a system power limit value.
Optionally, the power grid device includes: charging equipment, photovoltaic equipment and energy storage equipment.
In a second aspect, an embodiment of the present application provides a power regulating apparatus, which is applied to a controller in a micro-grid system, where the micro-grid system includes a grid-connected point, a plurality of grid devices, and a plurality of controllers, where one controller corresponds to one grid device, and the controller is electrically connected to the corresponding grid device, and the plurality of controllers are all electrically connected to the grid-connected point, and the apparatus includes: the device comprises a first determining module, a second determining module and a control module; the first determination module is used for determining a first normalization coefficient of the grid-connected point target power corresponding to the grid equipment in a preset time period by the controller, wherein the preset time period comprises a peak time period, a flat time period and a valley time period; the second determination module is used for determining the grid-connected point target power of the power grid equipment by the controller according to the first normalization coefficient of the grid-connected point target power of the power grid equipment and the system power limit value; and the control module is used for controlling the power grid equipment to adjust the grid-connected point target power of the power grid equipment according to the preset time period by the controller according to the incidence relation between the preset time period and the grid-connected point target power of the power grid equipment.
Optionally, the apparatus further comprises: the judgment module and the third determination module; the judging module is used for acquiring the operation power of the grid-connected point and the operation power of the power grid equipment in the current preset period within a preset time period by the controller and judging whether the operation power of the grid-connected point and the target power of the grid-connected point of the power grid equipment meet a preset relation or not; and the third determining module is used for determining the operating power of the power grid equipment in the next preset period in the preset period according to the operating power of the grid-connected point in the current preset period, the target power of the grid-connected point of the power grid equipment and the operating power of the power grid equipment if the operating power of the grid-connected point in the current preset period does not meet the preset power requirement.
Optionally, the determining module is specifically configured to perform normalization processing on the operation power of the grid-connected point by the controller, and obtain a normalization coefficient of the operation power of the grid-connected point after the normalization processing; the controller judges whether the grid-connected point operating power and the grid-connected point target power of the power grid equipment meet a preset relation or not according to the normalization coefficient of the grid-connected point operating power and the first normalization coefficient of the grid-connected point target power of the power grid equipment.
Optionally, the third determining module is specifically configured to perform normalization processing on the operating power of the power grid device by the controller, and obtain a normalization coefficient of the operating power of the power grid device after the normalization processing; the controller determines a normalization coefficient of the operating power of the power grid equipment in the next preset period within a preset time period according to the normalization coefficient of the operating power of the grid-connected point, a first normalization coefficient of the target power of the grid-connected point of the power grid equipment and the normalization coefficient of the operating power of the power grid equipment; and the controller determines the operating power of the power grid equipment in the next preset period in the preset period according to the normalization coefficient of the operating power of the power grid equipment in the next preset period in the preset period and the system power limit value.
Optionally, the determining module is specifically configured to, if the operating power of the power grid device in the current preset period in the preset time period is met, use the operating power of the power grid device in the next preset period in the preset time period as the operating power of the power grid device in the next preset period by the controller.
Optionally, the second determining module is specifically configured to determine, by the controller, a second normalization coefficient of the grid-connected point target power of the power grid device according to the preset priority of the corresponding power grid device; the controller determines the grid-connected point target power of the power grid equipment according to a first normalization coefficient of the grid-connected point target power of the power grid equipment, a second normalization coefficient of the grid-connected point target power of the power grid equipment and a system power limit value.
Optionally, the power grid device includes: charging equipment, photovoltaic equipment and energy storage equipment.
In a third aspect, an embodiment of the present application provides an electronic device, including: the power regulation method comprises a processor, a storage medium and a bus, wherein the storage medium stores machine-readable instructions executable by the processor, when the electronic device runs, the processor and the storage medium communicate through the bus, and the processor executes the machine-readable instructions to execute the steps of the power regulation method of the first aspect.
In a fourth aspect, the present application provides a storage medium, on which a computer program is stored, where the computer program is executed by a processor to perform the steps of the power adjustment method of the first aspect.
The beneficial effect of this application is:
in the power adjustment method, the power adjustment device, the electronic device and the storage medium provided by the embodiment of the application, the first normalization coefficient of the grid-connected point target power corresponding to the power grid device in the preset time period is determined through the controller, and the grid-connected point target power of the power grid device is determined according to the first normalization coefficient of the grid-connected point target power of the power grid device and the system power limit value, so that each controller can timely adjust the grid-connected point target power of each power grid device under different power grid rates according to the preset time period, and the economic operation of the micro-grid system can be realized under the condition that the micro-grid system is ensured not to run beyond the system power limit value.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a block diagram of a microgrid system provided by an embodiment of the present application;
fig. 2 is a schematic flowchart of a power adjustment method according to an embodiment of the present application;
fig. 3 is a schematic flowchart of a process of calculating a first normalization coefficient of a grid-connected point target power of a grid device according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram of a first normalization coefficient for determining a grid-connected point target power of a grid device according to an embodiment of the present application;
fig. 5 is a schematic flowchart of another power adjustment method provided in the embodiment of the present application;
fig. 6 is a schematic flow chart of another power adjustment method provided in the embodiment of the present application;
fig. 7 is a schematic flowchart of another power adjustment method provided in the embodiment of the present application;
fig. 8 is a schematic flow chart of another power adjustment method provided in the embodiment of the present application;
fig. 9 is a schematic flowchart of another power adjustment method provided in the embodiment of the present application;
fig. 10 is a schematic structural diagram of a power conditioning device according to an embodiment of the present application;
fig. 11 is a schematic structural diagram of another power conditioning device provided in the embodiment of the present application;
fig. 12 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
First, before the present application is introduced, an application scenario of the present application is described, taking the electric vehicle industry as an example, the rapid development of the electric vehicle industry, and the construction of the charging station becomes an essential infrastructure for the development of the electric vehicle, but since the construction speed of the power grid is much lower than that of the charging station, under the application scene of limited power capacity, a typical micro-grid system can be adopted to realize the rapid capacity expansion of the capacity of the charging station, but the existing micro-grid system does not consider how to realize the economic operation of the micro-grid system under the condition that the switching power of the grid-connected point does not exceed the system power limit value, wherein, the grid-connected point refers to different devices or loads connected together through an AC power grid or a distribution power grid, and only 1 metering point is possible for an external public power grid, and the metering point is the grid-connected point, a plurality of grid devices or loads may be connected below the grid point, and the power regulation method provided by the present application may solve the above-mentioned problems.
Fig. 1 is a block diagram of a microgrid system according to an embodiment of the present application. As shown in fig. 1, the system includes: the power regulation method comprises a grid-connected point 101, a plurality of grid devices 102 and a plurality of controllers 103, wherein one controller 103 corresponds to one grid device 102, the controller 103 is electrically connected with the corresponding grid device 102, the controllers 103 are electrically connected with the grid-connected point 101, each controller 103 can monitor and acquire relevant parameters in the running process of the micro-grid system such as the running power of the grid-connected point and the running power of each grid device, complete decoupling among the grid devices is realized, and the technical problem that the stability of the micro-grid system cannot be guaranteed when the controllers fail due to the fact that the plurality of grid devices are controlled by the same controller in the prior art is solved.
Fig. 2 is a schematic flow chart of a power regulation method provided in an embodiment of the present application, where an execution subject of the method is a controller in the microgrid system, as shown in fig. 2, the method includes:
s101, a controller determines a first normalization coefficient of grid-connected point target power corresponding to grid equipment in a preset time period, wherein the preset time period comprises a peak time period, a flat time period and a valley time period.
The power grid equipment can be photovoltaic equipment, charging equipment, energy storage equipment and the like in a micro-grid system; the preset time periods may include a peak time period, a flat time period, and a valley time period, and each time period may be divided according to the power frequency of the user to the power grid, the load of the power grid, and the like in different time periods, and of course, may also be divided according to other time periods, which is not limited herein. After the division, the power grid electricity prices in the peak time period, the flat time period and the valley time period can be further preset in a unified mode, optionally, the highest price in the peak time period and the lowest price in the valley time period can be set, and the middle section is located in the middle at ordinary times, so that the electricity utilization frequency of a user on the power grid in different time periods can be adjusted to a certain extent through the setting of different prices, the electricity utilization loads in different time periods are balanced, and the stable operation of the micro-grid system is guaranteed.
The first normalization coefficient of the grid-connected point target power corresponding to the grid equipment in the preset time period may represent a relationship between the grid-connected point target power of the grid equipment and a system power limit value in the preset time period, it should be noted that, if the power flow direction from the grid-connected point to each grid equipment branch is positive, and the power flow direction from each grid equipment branch to the grid-connected point is negative, if the power flow direction of the grid equipment is positive, the first normalization coefficient of the grid-connected point target power of the grid equipment can be any number between 0 and 1, if the power flow direction of the grid equipment is negative, the first normalization coefficient of the grid-connected point target power of the grid equipment can be any number between-1 and 0, and the first normalization coefficient of the grid-connected point target power of the power grid equipment can be obtained by calculation according to a preset normalization parameter.
Fig. 3 is a schematic flowchart of a process of calculating a first normalization coefficient of a grid-connected point target power of a power grid device according to an embodiment of the present application. Fig. 4 is a schematic diagram of a first normalization coefficient for determining a grid-connected point target power of a grid device according to an embodiment of the present disclosure. For example, the grid equipment includes photovoltaic equipment, charging equipment, and energy storage equipment, as shown in fig. 3, wherein, n _ ES, N _ PV and N _ EV respectively represent preset normalization parameters of the energy storage device, the photovoltaic device and the charging device, P1_ SET _ ES, P1_ SET _ PV and P1_ SET _ EV respectively represent a first normalization coefficient of grid-connected point target power of the energy storage device, a first normalization coefficient of grid-connected point target power of the photovoltaic device and a first normalization coefficient of grid-connected point target power of the charging device, taking the energy storage device as an example, TIME-2 indicates that the preset TIME period is a peak TIME period, TIME-1 indicates that the preset TIME period is a flat TIME period, TIME-0 indicates that the preset TIME period is a valley TIME period, when TIME-2, N _ ES of the energy storage device is 0.8, furthermore, a first normalization coefficient P1_ SET _ ES of the grid-connected point target power of the energy storage device in the peak period of time may be found to be 1-0.8-0.2; in the valley period, a first normalization coefficient P1_ SET _ ES of the grid-connected point target power of the energy storage device is 1-0.2-0.8; in the flat period, a first normalization coefficient P1_ SET _ ES of the grid-connected point target power of the energy storage device is 1-0.2-0.8; by referring to the method, a first normalization coefficient of the grid-connected point target power of the photovoltaic device and a first normalization coefficient of the grid-connected point target power of the charging device in each preset time period can be obtained, and a result shown in fig. 4 can be obtained.
As shown in fig. 4, the highest price of the peak time period and the lowest price of the valley time period can be set, the ordinary time period is in the middle, a preset time period cycle of 0 to T5 and a system power limit value of 100kW are taken as examples for explaining, the valley time period is 0 to T1, the peak time period is T1 to T2, the plateau time period is T2 to T3, the peak time period is T3 to T4, and the valley time period is T4 to T5, the determined 0 to T5 time period is 0 to T5, and the first normalization coefficients of the target power of the grid-connected points of the photovoltaic device are all-1; in the time period of 0-T5, the first normalization coefficients of the grid-connected point target power of the charging equipment are all 0.9; in the time periods of 0-T1, T1-T2, T2-T3, T3-T4 and T4-T5, the first normalization coefficients of the grid-connected point target power of the energy storage device are as follows in sequence: 0.8, 0.2, 0.8.
S102, the controller determines the grid-connected point target power of the power grid equipment according to the first normalization coefficient of the grid-connected point target power of the power grid equipment and the system power limit value.
The system power limit value refers to the maximum power capacity of the microgrid system, different maximum power capacities can be corresponded according to different microgrid systems, and the system power limit value is not limited in the application; the grid-connected point target power of the power grid equipment refers to a target power value which the power grid equipment needs to adjust through self power so that a grid-connected point can reach in real time, different power grid equipment can correspond to different grid-connected point target powers, and the grid-connected point target power corresponding to each power grid equipment can be obtained according to a first normalization coefficient of the grid-connected point target power of the power grid equipment and a system power limit value.
For example, if the grid device is a photovoltaic device, the photovoltaic device is a power generation device, so the power flow direction thereof is negative, and the main working mode thereof is maximum power generation, it can be considered that the general photovoltaic device does not exceed the system power limit (maximum power distribution capacity) of the microgrid region where the photovoltaic device is located, and the first normalization coefficient of the target power of the grid-connected point may be any number between-1 and 0. For example, the microgrid region has a 400kW region capacity, then a first normalization coefficient of the grid-connected point target power of the photovoltaic device may be-1, so that the photovoltaic device generates power at the maximum power, and the corresponding grid-connected point target power is-400 kW — 1 × 400 kW; and if the first normalization coefficient of the grid-connected point target power of the photovoltaic equipment is 0, the photovoltaic equipment can only operate in a limited power mode and cannot exert the efficiency of the photovoltaic equipment when the load is light.
As shown in fig. 4, correspondingly, a time interval from 0 to T5 is obtained, and the target power of the grid-connected point of the photovoltaic equipment is-100 kW — 1 × 100 kW; in a time interval of 0-T5, the target power of a grid connection point of the charging equipment is 90kW which is 0.9 multiplied by 100 kW; in the time periods of 0-T1, T1-T2, T2-T3, T3-T4 and T4-T5, the target power of the grid-connected point of the energy storage device is as follows in sequence: the controller may control each grid device to operate according to the grid connection point target power of the grid device determined in each preset time period, taking the energy storage device as an example, in the leveling time period and the valley time period, the grid connection point target power of the energy storage device may be reduced, and the grid connection point target power is set to 80 kW; in the peak period, the grid-connected point target power of the energy storage equipment can be further reduced, the value is set to be 20kW, and each power grid equipment can timely adjust the grid-connected point target power of each power grid equipment according to the power price of the power grid, so that the micro-grid system can economically run.
S103, controlling the power grid equipment to adjust the grid-connected point target power of the power grid equipment according to the preset time period by the controller according to the incidence relation between the preset time period and the grid-connected point target power of the power grid equipment.
As in the processes of S101 and S102, the association relationship between each grid device and the target power of the grid-connected point of the grid device in the preset time period may be determined, and the controller may control each grid device to adjust the target power of the grid-connected point according to the association relationship in the preset time period. Optionally, according to an actual application scenario, target powers of grid-connected points corresponding to the power grid devices may be different, and the controller corresponding to each power grid device may achieve the purpose of master-slave-free power control over each power grid device according to the target power of the grid-connected point of each power grid device, so as to achieve economic operation of the micro-grid system under the condition that operation of the micro-grid system is guaranteed not to exceed a system power limit value.
To sum up, in the power adjustment method provided in this embodiment of the application, the controller determines the first normalization coefficient of the grid-connected point target power corresponding to the power grid device in the preset time period, and determines the grid-connected point target power of the power grid device according to the first normalization coefficient of the grid-connected point target power of the power grid device and the system power limit value, so that each controller can adjust the grid-connected point target power of each power grid device at different power rates of the power grid in real time according to the preset time period, and under the condition that the operation of the microgrid system is not more than the system power limit value, the economic operation of the microgrid system can be realized.
Fig. 5 is a flowchart illustrating another power adjustment method according to an embodiment of the present application. Optionally, as shown in fig. 5, the method further includes:
s201, the controller obtains the operation power of the grid-connected point in the current preset period and the operation power of the power grid equipment in a preset time period, and judges whether the operation power of the grid-connected point and the target power of the grid-connected point of the power grid equipment meet a preset relation or not.
Each preset time period may include a plurality of preset cycles, each preset cycle refers to a sampling cycle of the operation power of the grid-connected point and the operation power of the power grid device, and the preset cycle may be 1 second, 5 seconds, 10 seconds, and the like, which is not limited in the present application; the operation power of the grid-connected point refers to a real-time value of the exchange power of the grid-connected point when the micro-grid system operates; the operation power of the power grid equipment refers to a real-time power value of the power grid equipment during operation, different preset periods in a preset time period are set according to the actual operation condition of the micro-grid system, the operation power of the grid-connected point may be different, and the operation power of the power grid equipment may be different.
Optionally, the preset relationship may be whether a difference between a grid-connected point target power of the power grid equipment and a grid-connected point operating power is within a preset difference range, and certainly, may also be whether a difference between a grid-connected point target power of the power grid equipment and a grid-connected point operating power is within a preset ratio range.
In addition, it should be noted that, in the present application, the obtaining manner of the operation power of the grid-connected point and the operation power of the power grid device in the current preset period is not limited, and may be directly obtained through a power meter electrically connected to each controller, or may be obtained through an ammeter and a voltmeter according to the relationship among current, voltage and power by calculation.
S202, if the preset period is not met, the controller determines the operating power of the power grid equipment in the next preset period in the preset period according to the operating power of the grid-connected point in the current preset period, the target power of the grid-connected point of the power grid equipment and the operating power of the power grid equipment.
If the controller judges that the grid-connected point operating power and the grid-connected point target power of the power grid equipment do not meet the preset relationship, the operating power of the power grid equipment in the next preset period in the preset period can be determined according to the grid-connected point operating power of the current preset period in the preset period, the grid-connected point target power of the power grid equipment and the operating power of the power grid equipment, so that in the next preset period in the preset period, each power grid equipment operates according to the determined operating power of the power grid equipment in the next preset period, economic operation of the micro-grid system can be guaranteed, meanwhile, the grid-connected point operating power does not exceed a system power limit value when the micro-grid system operates in the next preset period, and the micro-grid system can operate stably.
Fig. 6 is a schematic flowchart of another power adjustment method according to an embodiment of the present disclosure. Optionally, as shown in fig. 6, the determining whether the grid-connected point operating power and the grid-connected point target power of the grid device satisfy a preset relationship may include:
s301, the controller normalizes the operation power of the grid-connected point to obtain a normalization coefficient of the operation power of the grid-connected point after normalization.
S302, the controller judges whether the grid-connected point operating power and the grid-connected point target power of the power grid equipment meet a preset relation or not according to the normalization coefficient of the grid-connected point operating power and the first normalization coefficient of the grid-connected point target power of the power grid equipment.
The normalized coefficient of the grid-connected point operating power may represent a relationship between the grid-connected point operating power and a system power limit, and optionally may be obtained by referring to a method, for example, if the grid-connected point operating power is 90kW, and the system power limit is 100kW, then the normalized coefficient of the grid-connected point operating power is 90kW/100kW — 0.9. Whether the operation power of the grid-connected point and the target power of the grid-connected point of the power grid equipment meet the preset relation or not is judged through the normalization coefficient of the operation power of the grid-connected point and the first normalization coefficient of the target power of the grid-connected point of the power grid equipment, and the operation power of the grid-connected point and the target power of the grid-connected point of the power grid equipment can be subjected to proportional conversion relation relative to the micro-grid system where the operation power of the grid-connected point and the target power of the grid-connected point of the power grid equipment are located, so that the power adjusting method provided by the application can be matched with different micro-grid systems, and the applicability is improved.
For example, in the present application, a power grid device is taken as an energy storage device as an example, if P1_ RUN represents a normalization coefficient of a grid-connected point operating power, and P1_ SET _ ES represents a first normalization coefficient of a grid-connected point target power of the energy storage device, it may be determined whether the normalization coefficient P1_ RUN of the grid-connected point operating power satisfies a preset condition P1_ SET _ ES × (1-X%) ≦ P1_ RUN ≦ P1_ SET _ ES × (1+ X%), and it should be noted that, of course, the value of X% is not limited in the present application, and may be 3%, 5%, and the like according to an actual application scenario.
Fig. 7 is a flowchart of another power adjustment method provided in the embodiment of the present application, and optionally, as shown in fig. 7, the determining, by the controller, the operating power of the grid device in a next preset period in a preset period according to the operating power of the grid-connected point in the current preset period in the preset period, the target power of the grid-connected point of the grid device, and the operating power of the grid device includes:
s401, the controller normalizes the operating power of the power grid equipment to obtain a normalization coefficient of the operating power of the power grid equipment after normalization.
S402, the controller determines the normalization coefficient of the operation power of the power grid equipment in the next preset period within the preset time period according to the normalization coefficient of the operation power of the grid-connected point, the first normalization coefficient of the target power of the grid-connected point of the power grid equipment and the normalization coefficient of the operation power of the power grid equipment.
And S403, determining the operating power of the power grid equipment in the next preset period in the preset period by the controller according to the normalization coefficient of the operating power of the power grid equipment in the next preset period in the preset period and the system power limit value.
Optionally, the operating power of the grid device in the next preset period in the preset time period is determined, and a normalization coefficient corresponding to the operating power of the grid device may be determined first, and then the operating power of the grid device is further determined according to the normalization coefficient and the system power limit value.
For example, in the present application, a power grid device is taken as a photovoltaic device as an example, and specifically, the operating power of the photovoltaic device in the next preset period in the preset time period may be calculated by referring to the following method, where if P1_ RUN represents a normalization coefficient of the operation power of the grid-connected point, P3_ SET _ PV represents a first normalization coefficient of the target power of the grid-connected point of the photovoltaic device, P3_ RUN represents a normalization coefficient of the operation power of the photovoltaic device, P3_ RUN _1 represents a normalization coefficient of the operation power of the photovoltaic device in the next preset period, and P _ MAX represents a system power limit, the normalization coefficient P3_ RUN _1 of the operation power of the photovoltaic device in the next preset period in the preset time period may be represented as: p3_ RUN _1 — P3_ RUN + P1_ SET _ PV-P1_ RUN, and the operating power P3_ VALUE _1 of the photovoltaic apparatus in the next preset period in the preset period can be represented as: p3_ VALUE _1 ═ P3_ RUN _1 ═ P _ MAX.
The calculation of the operating power of other types of power grid devices in the next preset period may refer to the above calculation process, and is not described herein again.
Fig. 8 is a schematic flowchart of another power adjustment method according to an embodiment of the present application. Optionally, as shown in fig. 8, the determining whether the grid-connected point operating power and the grid-connected point target power of the power grid device satisfy a preset relationship includes:
s501, if yes, the controller takes the operation power of the power grid equipment in the current preset period in the preset period as the operation power of the power grid equipment in the next preset period in the preset period.
When the controller judges that the grid-connected point operating power and the grid-connected point target power of the power grid equipment meet the preset relationship, the controller does not adjust the next preset period of the power grid equipment within the preset time period, and the controller only needs to continuously keep operating according to the operating power of the power grid equipment within the preset time period in the current preset period, so that the micro-grid system can be ensured to realize economic operation, the grid-connected point operating power does not exceed the system power limit value, and the micro-grid system can stably operate.
Fig. 9 is a flowchart illustrating another power adjustment method according to an embodiment of the present application. Optionally, as shown in fig. 9, the determining, by the controller, the grid-connected point target power of the power grid device according to the first normalization coefficient of the grid-connected point target power of the power grid device and the system power limit value, further includes:
s601, the controller determines a second normalization coefficient of the grid-connected point target power of the power grid equipment according to the preset priority of the corresponding power grid equipment.
S602, the controller determines the grid-connected point target power of the power grid equipment according to a first normalization coefficient of the grid-connected point target power of the power grid equipment, a second normalization coefficient of the grid-connected point target power of the power grid equipment and a system power limit value.
In addition, it should be noted that, when the microgrid system includes a plurality of grid devices, each grid device may correspond to a corresponding preset priority, and the preset priority of the grid device may be designed according to the user requirements. For example, when the microgrid system comprises photovoltaic equipment, charging equipment and energy storage equipment, if the requirement of a user is that the photovoltaic equipment always generates power at the maximum power as the highest priority, the charging equipment is used for charging the electric automobile, and as the second priority, the energy storage equipment has a charging and discharging function and is the third priority, a second normalization coefficient of the grid-connected point target power of the grid equipment can be determined according to the preset priority, the second normalization coefficient can further represent the relation between the grid-connected point target power of the grid equipment and the system power limit value, so that the grid-connected point target power can be determined by the controller according to the first normalization coefficient of the grid-connected point target power, the second normalization coefficient of the grid-connected point target power of the grid equipment and the system power limit value, and when each grid equipment operates according to the corresponding grid-connected point target power, the no master-slave power control among the grid equipment can be realized, the grid-connected point operation power is guaranteed not to exceed the system power limit value, the stability of the micro-grid system is improved, and the micro-grid system can be guaranteed to operate economically.
Alternatively, the grid-connected point target power value of the power grid device may be determined by referring to the following method, for example, if the system power limit is a, the first normalization coefficient of the grid-connected point target power of the power grid device is K1, the second normalization coefficient of the grid-connected point target power of the power grid device is K2, and then the grid-connected point target power value B of the power grid device may be expressed as: B-K1-K2-a. Of course, it should be noted that the determining method is not limited in the present application, and a corresponding method may be selected according to an actual application scenario.
Optionally, the power grid device includes: charging equipment, photovoltaic equipment and energy storage equipment.
Of course, it should be noted that, according to an actual application scenario, the power grid device may include any combination of a charging device, a photovoltaic device, and an energy storage device, and may also include other power grid devices, which is not limited herein.
Fig. 10 is a schematic structural diagram of a power conditioning apparatus according to an embodiment of the present application, where the apparatus may be applied to a controller in a micro-grid system, where the micro-grid system includes a grid-connected point, a plurality of grid devices, and a plurality of controllers, where one controller corresponds to one grid device, and the controller is electrically connected to the corresponding grid device, and the plurality of controllers are electrically connected to the grid-connected point, as shown in fig. 10, the apparatus includes: a first determination module 110, a second determination module 120, and a control module 130.
A first determining module 110, configured to determine, by a controller, a first normalization coefficient of a grid-connected point target power corresponding to a preset time period of a power grid device, where the preset time period includes a peak time period, a flat time period, and a valley time period; the second determining module 120 is configured to determine a grid-connected point target power of the power grid device according to the first normalization coefficient of the grid-connected point target power of the power grid device and the system power limit value; and the control module 130 is configured to control the power grid device to adjust the grid-connected point target power of the power grid device according to a preset time period according to the incidence relation between the preset time period and the grid-connected point target power of the power grid device.
Fig. 11 is a schematic structural diagram of another power conditioning device according to an embodiment of the present application. Optionally, as shown in fig. 11, the apparatus may further include: a determination module 140 and a third determination module 150; the judging module 140 is configured to obtain, by the controller, the operation power of the grid-connected point and the operation power of the power grid device in the current preset period within a preset time period, and judge whether the grid-connected point operation power and the grid-connected point target power of the power grid device satisfy a preset relationship; and a third determining module 150, configured to, if the operating power of the grid-connected point in the preset period is not met, determine, by the controller, the operating power of the grid-connected point in the preset period according to the operating power of the grid-connected point in the current preset period, the target power of the grid-connected point of the grid device, and the operating power of the grid device in the preset period, and determine the operating power of the grid device in the next preset period in the preset period.
Optionally, the determining module 140 is specifically configured to perform normalization processing on the operation power of the grid-connected point by the controller, and obtain a normalization coefficient of the operation power of the grid-connected point after the normalization processing; the controller judges whether the grid-connected point operating power and the grid-connected point target power of the power grid equipment meet a preset relation or not according to the normalization coefficient of the grid-connected point operating power and the first normalization coefficient of the grid-connected point target power of the power grid equipment.
Optionally, the third determining module 150 is specifically configured to perform normalization processing on the operating power of the power grid device by the controller, and obtain a normalization coefficient of the operating power of the power grid device after the normalization processing; the controller determines a normalization coefficient of the operating power of the power grid equipment in the next preset period within a preset time period according to the normalization coefficient of the operating power of the grid-connected point, a first normalization coefficient of the target power of the grid-connected point of the power grid equipment and the normalization coefficient of the operating power of the power grid equipment; and the controller determines the operating power of the power grid equipment in the next preset period in the preset period according to the normalization coefficient of the operating power of the power grid equipment in the next preset period in the preset period and the system power limit value.
Optionally, the determining module 140 is specifically configured to, if the operating power of the power grid device in the current preset period in the preset time period is met, use the operating power of the power grid device in the next preset period in the preset time period as the operating power of the power grid device in the next preset period by the controller.
Optionally, the second determining module 120 is specifically configured to determine, by the controller, a second normalization coefficient of the grid-connected point target power of the power grid device according to the preset priority of the corresponding power grid device; the controller determines the grid-connected point target power of the power grid equipment according to a first normalization coefficient of the grid-connected point target power of the power grid equipment, a second normalization coefficient of the grid-connected point target power of the power grid equipment and a system power limit value.
Optionally, the power grid device includes: charging equipment, photovoltaic equipment and energy storage equipment.
The above-mentioned apparatus is used for executing the method provided by the foregoing embodiment, and the implementation principle and technical effect are similar, which are not described herein again.
These above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), among others. For another example, when one of the above modules is implemented in the form of a Processing element scheduler code, the Processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of calling program code. For another example, these modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).
Fig. 12 is a schematic structural diagram of an electronic device according to an embodiment of the present application. As shown in fig. 12, the electronic device may include: the processor 210, the storage medium 220, and the bus 230, where the storage medium 220 stores machine-readable instructions executable by the processor 210, when the electronic device runs, the processor 210 communicates with the storage medium 220 through the bus 230, and the processor 210 executes the machine-readable instructions to perform the steps of the power adjusting method, which are similar to the implementation principles and technical effects, and are not described herein again.
Optionally, the present application further provides a computer-readable storage medium, on which a computer program is stored, where the computer program is read and executed by a processor, so as to implement the method embodiments, and implement the principle and the technical effect similar to each other, which are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication electric connection may be an indirect coupling or communication electric connection of some interfaces, devices or units, and may be in an electric, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) or a processor (processor) to perform some steps of the methods according to the embodiments of the present application. And the aforementioned storage medium includes: a U disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (9)
1. A power conditioning method applied to a controller in a microgrid system, the microgrid system comprising a grid-connected point, a plurality of grid devices and a plurality of controllers, wherein one controller corresponds to one grid device and the controller is electrically connected to the corresponding grid device, and the controllers are electrically connected to the grid-connected point, the method comprising:
the controller determines a first normalization coefficient of a grid-connected point target power corresponding to the grid equipment in a preset time period, wherein the preset time period comprises a peak time period, a flat time period and a valley time period;
the controller determines grid-connected point target power of the power grid equipment according to a first normalization coefficient of the grid-connected point target power of the power grid equipment and a system power limit value;
the controller controls the power grid equipment to adjust the grid-connected point target power of the power grid equipment according to the preset time period according to the incidence relation between the preset time period and the grid-connected point target power of the power grid equipment;
the method further comprises the following steps:
the controller acquires the operation power of the grid-connected point in the current preset period and the operation power of the power grid equipment in the preset time period, and judges whether the operation power of the grid-connected point and the target power of the grid-connected point of the power grid equipment meet a preset relation or not;
if the preset period does not meet the preset period, the controller determines the operating power of the power grid equipment in the next preset period in the preset period according to the operating power of the grid-connected point in the current preset period, the target power of the grid-connected point of the power grid equipment and the operating power of the power grid equipment.
2. The method according to claim 1, wherein the determining whether the grid-connected point operating power and the grid-connected point target power of the grid device satisfy a preset relationship comprises:
the controller is used for carrying out normalization processing on the operation power of the grid-connected point to obtain a normalization coefficient of the operation power of the grid-connected point after the normalization processing;
and the controller judges whether the grid-connected point operating power and the grid-connected point target power of the power grid equipment meet a preset relation or not according to the normalization coefficient of the grid-connected point operating power and the first normalization coefficient of the grid-connected point target power of the power grid equipment.
3. The method according to claim 2, wherein the determining, by the controller, the operating power of the grid device in a next preset period within the preset period according to the grid-connected point operating power in the preset period, the grid-connected point target power of the grid device, and the operating power of the grid device in the current preset period includes:
the controller is used for carrying out normalization processing on the operating power of the power grid equipment to obtain a normalization coefficient of the operating power of the power grid equipment after the normalization processing;
the controller determines a normalization coefficient of the operating power of the power grid equipment in the next preset period within the preset time period according to the normalization coefficient of the operating power of the grid-connected point, the first normalization coefficient of the target power of the grid-connected point of the power grid equipment and the normalization coefficient of the operating power of the power grid equipment;
and the controller determines the operating power of the power grid equipment in the next preset period in the preset period according to the normalization coefficient of the operating power of the power grid equipment in the next preset period in the preset period and the system power limit value.
4. The method according to claim 1, wherein the determining whether the grid-connected point operating power and the grid-connected point target power of the grid device satisfy a preset relationship comprises:
and if so, taking the running power of the power grid equipment in the current preset period in the preset period as the running power of the power grid equipment in the next preset period in the preset period by the controller.
5. The method of claim 1, wherein the controller determines the grid-connected point target power of the grid device according to a first normalization coefficient of the grid-connected point target power of the grid device and a system power limit, further comprising:
the controller determines a second normalization coefficient of the grid-connected point target power of the power grid equipment according to the corresponding preset priority of the power grid equipment;
and the controller determines the grid-connected point target power of the power grid equipment according to the first normalization coefficient of the grid-connected point target power of the power grid equipment, the second normalization coefficient of the grid-connected point target power of the power grid equipment and the system power limit value.
6. The method according to any of claims 1-5, wherein the grid device comprises: charging equipment, photovoltaic equipment and energy storage equipment.
7. A power conditioning apparatus applied to a controller in a microgrid system, the microgrid system including a grid-connected point, a plurality of grid devices and a plurality of controllers, wherein one controller corresponds to one grid device and the controller is electrically connected to the corresponding grid device, and the plurality of controllers are electrically connected to the grid-connected point, the apparatus comprising: the device comprises a first determining module, a second determining module and a control module;
the first determining module is configured to determine, by the controller, a first normalization coefficient of a grid-connected point target power corresponding to a preset time period of the power grid device, where the preset time period includes a peak time period, a flat time period, and a valley time period;
the second determining module is used for determining the grid-connected point target power of the power grid equipment by the controller according to the first normalization coefficient of the grid-connected point target power of the power grid equipment and the system power limit value;
the control module is used for controlling the power grid equipment to adjust the grid-connected point target power of the power grid equipment according to the preset time period by the controller according to the incidence relation between the preset time period and the grid-connected point target power of the power grid equipment;
the power regulating apparatus further includes: the judgment module and the third determination module;
the judging module is used for the controller to obtain the operation power of the grid-connected point in the current preset period and the operation power of the power grid equipment in a preset time period, and judging whether the operation power of the grid-connected point and the target power of the grid-connected point of the power grid equipment meet a preset relation or not;
and the third determining module is used for determining the operating power of the power grid equipment in the next preset period in the preset period according to the operating power of the grid-connected point in the current preset period, the target power of the grid-connected point of the power grid equipment and the operating power of the power grid equipment if the operating power of the grid-connected point in the current preset period does not meet the preset power requirement.
8. An electronic device, comprising: a processor, a storage medium and a bus, the storage medium storing machine-readable instructions executable by the processor, the processor and the storage medium communicating via the bus when the electronic device is operating, the processor executing the machine-readable instructions to perform the steps of the power regulating method according to any one of claims 1-6.
9. A storage medium having stored thereon a computer program for performing the steps of the power adjustment method according to any one of claims 1-6 when executed by a processor.
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Application publication date: 20191220 Assignee: Xi'an TGOOD Intelligent Charging Technology Co.,Ltd. Assignor: Xi'an teride lingchong New Energy Technology Co.,Ltd. Contract record no.: X2021370010006 Denomination of invention: Power regulating method, device, electronic equipment and storage medium License type: Common License Record date: 20210129 |
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Address after: Room 101, building a, building 6, digital Economic Industrial Park, 201 Pufeng Road, high tech Zone, Xi'an, Shaanxi 710003 Patentee after: Xi'an telingchong New Energy Technology Co.,Ltd. Address before: Room 101, building a, building 6, digital Economic Industrial Park, 201 Pufeng Road, high tech Zone, Xi'an, Shaanxi 710003 Patentee before: Xi'an teride lingchong New Energy Technology Co.,Ltd. |
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Effective date of registration: 20230307 Address after: 710000 Room 309, building a, building 6, digital economy industrial park, No. 201, Pufeng Road, high tech Zone, Xi'an, Shaanxi Province Patentee after: Xi'an lingchong chuangxiang New Energy Technology Co.,Ltd. Address before: Room 101, building a, building 6, digital Economic Industrial Park, 201 Pufeng Road, high tech Zone, Xi'an, Shaanxi 710003 Patentee before: Xi'an telingchong New Energy Technology Co.,Ltd. |
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