CN112383096B - Power supply power adjusting method, device and power supply system - Google Patents
Power supply power adjusting method, device and power supply system Download PDFInfo
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- CN112383096B CN112383096B CN202011287675.0A CN202011287675A CN112383096B CN 112383096 B CN112383096 B CN 112383096B CN 202011287675 A CN202011287675 A CN 202011287675A CN 112383096 B CN112383096 B CN 112383096B
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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
- H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
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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
- H02J3/28—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
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Abstract
The invention discloses a power supply power adjusting method, a device and a power supply system. Wherein the method comprises the following steps: acquiring the power consumption and power supply parameters of the power supply system; determining a power supply mode of a power grid; the power grid power supply mode comprises a constant power mode and a limited power mode; and carrying out power supply adjustment according to the quantity relation between the power consumption power and the power supply parameters based on a scheduling strategy corresponding to the power grid power supply mode. According to the invention, the power supply quantity can be accurately regulated according to the power consumption requirements under different power grid power supply modes, and the situations of waste of electric energy or insufficient power supply quantity are avoided.
Description
Technical Field
The invention relates to the technical field of electronic power, in particular to a power supply power adjusting method, a device and a power supply system.
Background
At present, one of the existing energy control modes is to separate and adjust the two ends of a power supply end and a power utilization end, the power supply end increases the supply of energy, the energy supply is abundant, the power utilization end increases the development of energy-saving products, so that the energy conservation to the maximum extent is realized, the energy utilization efficiency of power utilization loads is improved, the power supply end and the power utilization end of the adjustment scheme are completely independent, and the power supply end and the power utilization end are not effectively linked.
According to another scheme, part or all of the power grid side, the power generation side and the energy storage side are scheduled to supply power for the power utilization side according to power utilization requirements, but a power regulation scheme aiming at each power supply side is not adopted, and when constant power supply and limited power supply of the power grid are not considered, the difference of power regulation ranges is avoided, so that the power supply quantity cannot be accurately regulated according to the power utilization requirements in the regulation mode.
Aiming at the problem that the power supply quantity cannot be accurately regulated according to the power consumption requirement in the prior art, no effective solution is proposed at present.
Disclosure of Invention
The embodiment of the invention provides a method, a device and a system for adjusting power supply power, which are used for solving the problem that the power supply quantity cannot be accurately adjusted according to the power consumption requirement in the prior art.
In order to solve the technical problems, the present invention provides a power supply power adjustment method, which is applied to a power supply system, and the method includes:
acquiring the power consumption and power supply parameters of the power supply system;
determining a power supply mode of a power grid; the power grid power supply mode comprises a constant power mode and a limited power mode;
and carrying out power supply adjustment according to the quantity relation between the power consumption power and the power supply parameters based on a scheduling strategy corresponding to the power grid power supply mode.
Further, the power supply parameters include: generating power, grid power, energy storage discharging power and energy storage charging power.
Further, if the power grid power supply mode is a constant power mode, based on a scheduling policy corresponding to the power grid power supply mode, performing power supply adjustment according to the number relationship between the power consumption power and the power supply parameters, including:
if the generated power and the grid power are less than the used power and less than the generated power and the grid power and the energy storage and discharge power, the generated power is controlled to be unchanged, and the energy storage and discharge power is controlled to be reduced until the used power = the generated power and the grid power and the energy storage and discharge power;
if the generated power and the grid power-stored charging power are less than the used power and less than the generated power and the grid power, controlling the generated power to be unchanged, and simultaneously controlling the stored charging power to be reduced until the used power = the generated power and the grid power-stored charging power;
and if the electric power is less than the generated power and the grid power-energy storage charging power, controlling the energy storage charging power to be unchanged, simultaneously controlling a grid power supply mode to be switched to a limited power mode, and reducing the grid power until the electric power is less than the generated power and the grid power-energy storage charging power.
Further, if the power grid power supply mode is a power mode, based on a scheduling policy corresponding to the power grid power supply mode, performing power supply adjustment according to the number relationship between the power consumption power and the power supply parameters, including:
if the generated power and the energy storage discharge power are less than the generated power, the power grid power and the energy storage discharge power, controlling the energy storage discharge power to rise to the maximum value, and reducing the power grid power until the generated power = the generated power, the power grid power and the energy storage discharge power;
if the generated power is less than the used power and less than the generated power plus the energy storage discharge power, controlling the power of the power grid to be reduced to zero, and simultaneously controlling the energy storage discharge power to be reduced until the used power = the generated power plus the energy storage discharge power;
if the generated power-the stored energy charging power < the used electric power < the generated power, controlling the stored energy charging power to be reduced until the generated power-the stored energy charging power = the used electric power;
and if the electric power is less than the generated power and the stored energy charging power, controlling the stored energy charging power to rise until the electric power is less than the generated power and the stored energy charging power.
Further, before determining the grid power mode, the method further comprises:
judging whether the power consumption is larger than the generated power, the grid power and the energy storage discharge power or not;
and if so, controlling the electric power to be reduced step by step until the electric power=the generated power+the grid power+the energy storage and discharge power.
Further, controlling the power consumption to be reduced step by step includes:
according to a preset grade, controlling the power consumption to be reduced by one grade;
judging whether the power consumption is larger than the generated power, the grid power and the energy storage discharge power or not;
and if so, controlling the electric power to be reduced by one step until the electric power=the generated power+the grid power+the energy storage discharge power.
Further, before controlling the step-by-step decrease of the electric power, the method further includes:
judging whether the energy storage discharge power reaches the maximum value or not;
if yes, triggering and controlling the power consumption to be gradually reduced;
if not, controlling the energy storage discharge power to rise to the maximum value;
judging whether the power consumption is larger than the generated power, the grid power and the energy storage discharge power or not;
if yes, triggering and controlling the power consumption to be gradually reduced;
if not, stopping power supply power regulation if the power consumption=the generated power+the grid power+the energy storage discharge power; and if the electric power is less than the generated power, the grid power and the energy storage discharging power, triggering to determine a grid power supply mode.
The invention also provides a power supply power adjusting device for realizing the power supply power adjusting method, which comprises the following steps:
the parameter acquisition module is used for acquiring the power consumption and the power supply parameters of the power supply system; wherein the power supply parameters include: generating power, grid power, energy storage discharging power and energy storage charging power;
the mode determining module is used for determining a power supply mode of the power grid; the power grid power supply mode comprises a constant power mode and a limited power mode;
and the adjusting module is used for adjusting the power supply power according to the quantity relation between the power consumption power and the power supply power parameters according to different scheduling strategies under different power grid power supply modes.
The invention also provides a power supply system which comprises the power supply power adjusting device.
The present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the above-described power supply adjustment method.
By applying the technical scheme of the invention, the power consumption and the power supply parameters of the power supply system are firstly obtained; then determining a power supply mode of a power grid; based on a scheduling strategy corresponding to the power grid power supply mode, the power supply power is adjusted according to the quantity relation between the power consumption power and the power supply power parameters, and the power supply quantity can be accurately adjusted according to the power consumption requirement under different power grid power supply modes, so that the situations of waste of electric energy or insufficient power supply quantity are avoided.
Drawings
Fig. 1 is a block diagram of a power supply system according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method of regulating power supplied according to an embodiment of the present invention;
fig. 3 is a structural view of a power supply power adjusting device according to an embodiment of the present invention;
fig. 4 is a structural view of a power supply adjusting device according to another embodiment of the present invention;
FIG. 5 is a flowchart of a method for regulating power supplied in constant power mode according to an embodiment of the present invention;
fig. 6 is a flowchart of a method for adjusting power supply in a constant power mode according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, the "plurality" generally includes at least two.
It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrase "if determined" or "if detected (stated condition or event)" may be interpreted as "when determined" or "in response to determination" or "when detected (stated condition or event)" or "in response to detection (stated condition or event), depending on the context.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such product or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a commodity or device comprising such element.
Alternative embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Example 1
The embodiment provides a power supply power adjusting method, which is applied to a power supply system, and fig. 1 is a block diagram of the power supply system according to an embodiment of the invention, as shown in fig. 1, and the system includes: the device comprises a photovoltaic power generation device 1 for outputting generated power; a power grid 2 for outputting grid power; the energy storage battery 3 is used for outputting energy storage discharging power and inputting energy storage charging power, wherein the energy storage charging power is a negative value; also included are a dc load 4 and an ac load 5, the sum of the power required by the dc load and the ac load being power.
Fig. 2 is a flowchart of a method for adjusting power supply according to an embodiment of the present invention, as shown in fig. 2, the method includes:
s101, acquiring the power consumption and the power supply parameters of the power supply system.
In the specific implementation process, in order to avoid the situation that the power supply exceeds the power supply, which leads to excessive supply of energy, or the power supply is smaller than the power supply, which leads to unbalance of supply and demand such as insufficient supply of energy, it is desirable that the power supply and the power supply are basically balanced, and in order to finally achieve this purpose, the power supply and the power supply parameters of the power supply system need to be acquired first.
S102, determining a power supply mode of a power grid; the power grid power supply mode comprises a constant power mode and a limited power mode.
The power supply mode of the power grid is divided into a constant power mode and a limited power mode, in the constant power mode, the power supply of the power grid cannot be regulated, and in the limited power mode, the power supply of the power grid can be regulated within a certain range, so that the regulation strategies of the power supply in the two different modes are different, and in order to select a proper regulation strategy, the power supply mode of the power grid needs to be determined to be the constant power mode or the limited power mode.
And S103, based on a scheduling strategy corresponding to the power grid power supply mode, carrying out power supply adjustment according to the quantity relation between the power consumption power and the power supply power parameters.
The power supply power adjusting method of the embodiment firstly obtains the power consumption and the power supply parameters of the power supply system; then determining a power supply mode of a power grid; based on a scheduling strategy corresponding to the power grid power supply mode, the power supply power is adjusted according to the quantity relation between the power consumption power and the power supply power parameters, and the power supply quantity can be accurately adjusted according to the power consumption requirement under different power grid power supply modes, so that the situations of waste of electric energy or insufficient power supply quantity are avoided.
Example 2
The present embodiment provides another power supply adjustment method, and since the power supply device in the present embodiment includes the photovoltaic power generation device 1, the power grid 2, and the energy storage battery 3, the power supply parameters include: generating power, grid power, energy storage discharging power and energy storage charging power.
As described above, in the different power grid power supply modes, the adjustment strategy of the power supply power is different, and in the constant power mode, since the power grid power is constant, if the power grid power supply mode is the constant power mode, the power supply power adjustment is performed according to the number relationship between the power consumption power and the power supply power parameter based on the scheduling strategy corresponding to the power grid power supply mode, which includes: if the generated power is less than the grid power and less than the generated power, the grid power and the energy storage and discharge power, the sum of the generated power, the grid power and the energy storage and discharge power is larger than the generated power, if the current power of the three is kept, the excessive supply is caused, so that the supplied power can be reduced, but the grid power is a constant value and cannot be changed, the power adjustment of the energy storage battery is the simplest and the most rapid and is easy to realize, so that the generated power is controlled to be kept unchanged, and the energy storage and discharge power is controlled to be reduced until the generated power is less than the generated power, the grid power and the energy storage and discharge power;
if the generated power is less than the grid power, the stored energy charging power is less than the used power is less than the generated power and the grid power, the fact that the power supply is insufficient is caused if the current power is kept for stored energy charging is indicated, so that the generated power is controlled to be unchanged, and the stored energy charging power is controlled to be reduced until the used power is less than the generated power, the grid power and the stored energy charging power;
if the power consumption is less than the power generation power and the power grid power and the energy storage charging power, the current power consumption requirement is smaller, the energy storage charging power can be controlled to be unchanged at the moment in order to ensure the charging speed, meanwhile, the power grid power supply mode is controlled to be switched to a limited power mode, and the power grid power is reduced until the power consumption is less than the power generation power and the power grid power and the energy storage charging power.
Because the power of the power grid can be regulated within a certain range in the constant power mode, if the power supply mode of the power grid is the power limiting mode, the power supply regulation is performed according to the number relation between the power consumption and the power supply parameters based on a scheduling strategy corresponding to the power supply mode of the power grid, and the method comprises the following steps: if the generated power is less than the stored discharge power is less than the generated power is less than the grid power is less than the stored discharge power, because the charge and discharge control of the stored battery is easier to realize, the stored battery is preferably used for supplying power, in particular, the stored discharge power is controlled to rise to the maximum value, and the grid power is reduced until the generated power is less than the generated power, the grid power is less than the stored discharge power;
if the generated power is less than the used power and less than the generated power plus the energy storage discharge power, the generated power and the energy storage discharge power can meet the used power, and the allowance exists, but the discharge of the energy storage battery is completely closed, the power supply power is insufficient, the power of the power grid can be controlled to be reduced to zero in order to ensure the sufficient supply of the electric energy and avoid the waste, and the energy storage discharge power is controlled to be reduced until the used power=the generated power plus the energy storage discharge power;
if the generated power-stored charging power < used power < generated power, the table shows that if the stored energy battery stops charging at this time, the electric energy supply is excessive, but if the stored energy battery is charged according to the current charging power, the electric energy supply is insufficient, so that in order to realize the supply-demand balance, the stored energy charging power is controlled to be reduced until the generated power-stored energy charging power=used power;
if the power consumption < the power generation power-the energy storage charging power, it indicates that the current power consumption requirement is low, and in order to increase the charging speed, the energy storage charging power can be controlled to be increased until the power consumption=the power generation power-the energy storage charging power.
The power supply of a part of the power supply devices may be reduced when the power consumption is smaller than the sum of the powers supplied by all the power supply devices, but the power consumption needs to be adjusted instead of the power supply if the power consumption is smaller than the sum of the powers supplied by all the power supply devices, so that before determining the grid power supply mode, the above method further comprises:
judging whether the electricity consumption power is larger than the generated power, the grid power and the energy storage and discharge power or not; and if so, controlling the power consumption to be reduced step by step until the power consumption=the generated power+the grid power+the energy storage discharge power, and stopping power supply power regulation. Specifically, the step-by-step reduction of the control electric power includes: according to the preset grade, controlling the power consumption to be reduced by one grade; judging whether the power consumption power is larger than the generated power, the grid power and the energy storage and discharge power or not; if so, the power consumption is controlled to be reduced by one stage, and the power supply power regulation is stopped until the power consumption=the generated power, the grid power and the energy storage discharge power.
The energy storage discharge power has a certain range and is not always at the maximum value, if the power consumption is greater than the generated power, the grid power and the energy storage discharge power, the current energy storage discharge power may not reach the maximum value, so before the power consumption is controlled to be reduced step by step, the method further comprises: whether the stored energy discharging power reaches the maximum value or not; if yes, triggering control to gradually reduce the power consumption; if not, controlling the energy storage discharge power to rise to the maximum value; judging whether the power consumption power is larger than the generated power, the grid power and the energy storage discharge power are met or not again; if yes, triggering control to gradually reduce the power consumption; if not, two conditions exist, and if the electric power=the generated power+the grid power+the energy storage and discharge power, the power supply power regulation is stopped; and if the electric power is less than the generated power, the grid power and the energy storage discharging power, triggering to determine a grid power supply mode.
Example 3
The embodiment provides a power supply adjusting device, configured to implement the power supply adjusting method, and fig. 3 is a structural diagram of the power supply adjusting device according to an embodiment of the present invention, as shown in fig. 3, where the device includes:
a parameter obtaining module 10, configured to obtain power consumption and power supply parameters of the power supply system; wherein the power supply parameters include: generating power, grid power, energy storage discharging power and energy storage charging power.
In a specific implementation process, in order to avoid the situation that the power supply exceeds the power consumption power, resulting in excessive supply of energy, or the power supply is smaller than the power consumption power, resulting in unbalance of supply and demand such as insufficient supply of energy, it is desirable that the power supply and the power consumption are basically balanced, and in order to finally achieve this, the parameter acquisition module 10 needs to be set to acquire the power consumption and the power consumption parameters of the power supply system.
A mode determining module 20 for determining a grid power mode; wherein, the electric network power supply mode comprises a constant power mode and a limited power mode.
The power supply mode of the power grid is divided into a constant power mode and a limited power mode, in the constant power mode, the power supply of the power grid cannot be regulated, and in the limited power mode, the power supply of the power grid can be regulated within a certain range, so that the regulation strategies of the power supply in the two different modes are different, and in order to select a proper regulation strategy, the power supply mode of the power grid needs to be determined to be the constant power mode or the limited power mode.
And the adjusting module 30 is configured to adjust the power supply according to the number relationship between the power consumption and the power supply parameter according to different scheduling strategies in different power grid power supply modes.
In the power supply power adjusting device of the embodiment, the parameter obtaining module 10 obtains the power consumption and the power supply parameters of the power supply system; then determining a grid power mode by the mode determination module 20; finally, the power supply power is adjusted according to the quantity relation between the power consumption power and the power supply power parameters based on the scheduling strategy corresponding to the power supply mode of the power grid through the adjusting module 30 in the power supply modes of different power grids, so that the power supply quantity can be accurately adjusted according to the power consumption requirements in the power supply modes of different power grids, and the situations of waste of electric energy or insufficient power supply quantity are avoided.
Example 4
In this embodiment, another power supply adjusting device is provided, fig. 4 is a block diagram of the power supply adjusting device according to another embodiment of the present invention, as described above, in different power supply modes of the power supply network, the adjusting strategy of the power supply is different, and in the constant power mode, the power supply network is constant, so as to show that, as shown in fig. 4, the adjusting module 30 includes: the first adjustment unit 301 is provided with a first adjustment unit,
the power supply control unit is used for adjusting the power supply according to the quantity relation between the power consumption and the power supply parameters based on a scheduling strategy corresponding to the power supply mode of the power grid, specifically, when the power generation power is greater than the power consumption, the power grid power and the energy storage and discharge power, the sum of the power generation power, the power grid power and the energy storage and discharge power is greater than the power consumption at the moment, if the current power of the three is kept, the power supply can be reduced, but the power grid power is a constant value and cannot be changed, and the power adjustment of the energy storage battery is the simplest, the speed and the easiness in realization are realized, and therefore, the power generation power is controlled to be unchanged through the first adjusting unit 301, and the energy storage and discharge power is controlled to be reduced until the power consumption=the power generation power, the power grid power and the energy storage and discharge power are kept;
when the generated power+the grid power-the stored charging power < the used power < the generated power+the grid power, it is stated that if the current power is kept for the stored charging, the power supply is insufficient, so that the generated power is controlled to be unchanged by the first adjusting unit 301, and the stored charging power is controlled to be reduced until the used power=the generated power+the grid power-the stored charging power.
When the power consumption is less than the generated power and the grid power is less than the stored energy charging power, the current power consumption is indicated to be smaller, and in order to ensure the charging speed, the stored energy charging power is controlled to be unchanged through the first adjusting unit 301, meanwhile, the grid power supply mode is controlled to be switched to the limited power mode, and the grid power is reduced until the power consumption is less than the generated power and the grid power is less than the stored energy charging power.
Since the grid power can be regulated within a certain range in the constant power mode, the regulation module 30 comprises: the second adjusting unit 302 is configured to adjust the power supply according to the number relationship between the power consumption and the power supply parameter based on a scheduling policy corresponding to the power supply mode of the power grid, specifically, when the power consumption is greater than the power storage discharge power less than the power consumption is greater than the power generation power less than the power grid power less than the power storage discharge power, the power storage battery is preferably used for supplying power because the charge and discharge control of the energy storage battery is easier to implement, so that the power storage discharge power is controlled to rise to a maximum value by the second adjusting unit 302, and the power grid power is reduced until the power consumption=the power generation power + the power grid power + the power storage discharge power.
When the generated power is less than the used power and less than the generated power and the stored energy discharge power, it is indicated that the generated power and the stored energy discharge power can meet the used power at present and have a margin, but the discharge of the stored energy battery is completely closed, and the insufficient power supply is caused, so that the power supply is sufficient and the waste is avoided, the second adjusting unit 302 can control the power grid power to be reduced to zero, and simultaneously control the stored energy discharge power to be reduced until the used power=the generated power and the stored energy discharge power.
When the generated power-stored charge power < used power < generated power, the table shows that if the stored energy battery stops charging at this time, the supply of electric energy is excessive, but if the stored energy battery is charged according to the current charge power, the supply of electric energy is insufficient, and therefore, in order to achieve the supply-demand balance, the stored energy charge power is controlled to be reduced by the second adjusting unit 302 until the generated power-stored charge power=used power.
When the power consumption < power generation-energy storage charging power, it indicates that the current power consumption requirement is low, the energy storage charging power increase can be controlled by the second regulating unit 302 for increasing the charging speed until the power consumption=power generation-energy storage charging power.
The power supply power of a part of the power supply apparatuses may be reduced when the power consumption is smaller than the sum of the powers supplied from all the power supply apparatuses, but if the power consumption is smaller than the sum of the powers supplied from all the power supply apparatuses, the power consumption needs to be adjusted instead of the power supply power, and therefore, the above-mentioned adjusting module further includes:
a first judging unit 303, configured to judge whether the electric power > the generated power+the grid power+the energy storage and discharge power is satisfied; and the third adjusting unit 304 is configured to control the power consumption to decrease step by step when the power consumption is greater than the generated power, the grid power and the energy storage and discharge power, until the power consumption is greater than the generated power, the grid power and the energy storage and discharge power, and then stop the power supply adjustment.
The third adjusting unit 304 is specifically configured to: according to the preset grade, controlling the power consumption to be reduced by one grade; judging whether the power consumption power is larger than the generated power, the grid power and the energy storage and discharge power or not; if so, the power consumption is controlled to be reduced by one stage, and the power supply power regulation is stopped until the power consumption=the generated power, the grid power and the energy storage discharge power.
The energy storage discharge power has a certain range, and is not always at the maximum value, if the power consumption is greater than the generated power, the grid power and the energy storage discharge power, the current energy storage discharge power may not reach the maximum value, and therefore, the adjusting module 30 further includes:
a second judging unit 305, configured to determine whether the stored-energy discharging power reaches a maximum value; the third adjusting unit 304 is used for triggering the control to gradually reduce the electric power when the energy storage discharge power reaches the maximum value;
the above-mentioned adjusting module 30 further includes: a fourth adjusting unit 306, configured to control the energy storage discharge power to rise to a maximum value when the energy storage discharge power does not reach the maximum value;
after that, the first judging unit 303 judges again whether or not the electric power > the generated power + the grid power + the energy storage discharge power is established; in the case of yes, the third adjusting unit 304 controls the power consumption to be reduced stepwise; if not, two conditions exist, and when the electric power=the generated power+the grid power+the energy storage and discharge power, the power supply power regulation is stopped; the control mode determining module 20 determines the grid power mode when the power usage < power generation + grid power + energy storage discharge power.
Example 5
The present embodiment provides a power supply power adjusting method applied to a power supply system as shown in fig. 1 mentioned hereinabove, wherein an apparatus for supplying power includes a photovoltaic power generation apparatus 1 for supplying generated power; a grid 2 for providing grid power; an energy storage battery 3 for providing energy storage discharging power P3 and energy storage charging power P5, wherein the energy storage charging power P5 is a negative value; also included are a dc load 4 and an ac load 5, the sum of the power required by the dc load and the ac load being power. If the ratio of the generated power, the energy storage discharge power P3, the grid power and the power consumption P1 is 1:1:1:3, for example, the generated power P2 is 1kW, the stored energy discharging power P3 is 1kW, the grid power is 1kW, the power consumption power P1 is 3kW, and the power supply system stabilizes the direct current bus voltage by adjusting the stored energy charging and discharging.
Fig. 5 is a flowchart of a method for adjusting power supply in a constant power mode according to an embodiment of the present invention, as shown in fig. 5, the method includes:
s1, controlling the power grid to enter a constant power mode. In the initial state of this embodiment, the ratio of the generated power P2, the energy storage discharge power P3, the grid power, and the power consumption P1 is 1:1:1:3, for example, the generated power P2 is 1kW, the stored energy discharging power P3 is 1kW, the grid power is 1kW, the power consumption power P1 is 3kW, and the power supply system stabilizes the direct current bus voltage by adjusting the stored energy charging and discharging.
S2, judging the magnitude relation between the power consumption P1 and the power generation P2, the energy storage discharge power P3 and the grid power, if the power consumption P1 is larger than the power generation power P2+the energy storage discharge power P3+the grid power P4, executing the step S3, and if the power consumption P1 is smaller than the power generation power P2+the energy storage discharge power P3+the grid power P4, executing the step S4.
And S3, gradually reducing the power P1 according to the comfort level, the environment level, the function level and the emergency level until the power P1=the power generation power P2+the energy storage and discharge power P3+the power grid power P4. For example, if the power consumption P1 is 4kW, the generated power P2 is 1kW, the energy storage and discharge power P3 is 1kW, and the grid power P4 is 1kW, the power consumption P1 needs to be reduced to 3kW. Wherein, the power consumption of comfort level > the power consumption of environment level > the power consumption of function level > the power consumption of emergency level.
S4, judging the magnitude relation between the power P1 and the power P2 and the energy storage and discharge power P3, if the power P1 is larger than the power P2+ and the energy storage and discharge power P3, executing the step S5, and if the power P1 is smaller than the power P2+ and the energy storage and discharge power P3, executing the step S6.
And S5, controlling the generated power P2 to be unchanged, and reducing the energy storage discharge power P3 until the electric power P1=the generated power P2+the energy storage discharge power P3. When the power grid enters a constant power mode, the power grid power P4 is kept unchanged, the control power generation power P2 is kept unchanged at the moment, and the power supply power of the whole power supply system is regulated through the energy storage discharge power P3. For example, the power consumption P1 is 2.5kW, the power generation P2 is 1kW, the energy storage discharge power P3 is 1kW, the power grid power P4 is 1kW, and the energy storage discharge power P3 is controlled to be reduced to 0.5kW.
S6, judging the magnitude relation between the power consumption P1 and the power generation P2, the power grid power P4 and the energy storage charging power P5, if the power consumption P1 is larger than the power generation P2+ the power grid power P4-the energy storage charging power P5, executing the step S7, and if the power consumption P1 is smaller than the power generation P2+ the power grid power P4-the energy storage charging power P5, executing the step S8.
And S7, controlling the energy storage charging power P5 to be reduced until the electricity consumption power P1=the generated power P2+the grid power P4-the energy storage charging power P5. For example, the power consumption P1 is 1.5kW, the power generation P2 is 1kW, the power grid P4 is 1kW, and the energy storage charging power P5 is 1kW, so that the energy storage charging power P5 is reduced to 0.5kW.
And S8, entering a limited-power operation mode, and reducing the power grid power P4 until the electricity consumption power P1=the generated power P2+the power grid power P4-the energy storage charging power P5. For example, if the power consumption P1 is 1kW, the generated power P2 is 1kW, the grid power P4 is 1kW, and the stored energy charging power P5 is 0.5kW, the grid power P4 is reduced to 0.5kW.
Fig. 6 is a flowchart of a method for adjusting power supply in a constant power mode according to an embodiment of the present invention, as shown in fig. 6, the method includes:
s11, controlling the power grid to enter a power limiting mode. In the power limiting mode, the power provided by the power grid to the power supply system is always kept in a range and does not exceed the maximum power; in the initial state of this embodiment, the ratio of the generated power P2, the energy storage discharge power P3, the grid power P4, and the power consumption power P1 is 1:1:1:3, for example, the generated power P2 is 1kW, the energy storage and discharge power P3 is 1kW, the grid power P4 is 1kW, the power consumption power P1 is 3kW, and the power supply system stabilizes the voltage of the direct current bus by adjusting the energy storage and discharge.
S12, judging the magnitude relation between the power consumption P1 and the power generation P2, the energy storage discharging power P3 and the power grid power P4, if the power consumption P1 is larger than the power generation power P2+the energy storage discharging power P3+the power grid power P4, executing the step S13, and if the power consumption P1 is smaller than the power generation power P2+the energy storage discharging power P3+the power grid power P4, executing the step S14.
And S13, gradually reducing the power P1 according to the comfort level, the environment level, the function level and the emergency level until the power P1=the power generation power P2+the energy storage and discharge power P3+the power grid power P4. For example, if the power P1 is 4kW, the generated power P2 is 1kW, the energy storage and discharge power P3 is 1kW, and the grid power P4 is 1kW, the power P1 needs to be reduced to 3kW, wherein the comfort level power is greater than the environment level power is greater than the function level power is greater than the emergency level power.
S14, judging the magnitude relation between the power consumption P1, the power generation P2 and the energy storage discharge power P3, if the power consumption P1 is larger than the power generation P2+ the energy storage discharge power P3, executing the step S15, and if the power consumption P1 is smaller than the power generation P2+ the energy storage discharge power P3, executing the step S16.
S15, the energy storage discharge power P3 is controlled to rise to the maximum value, and the grid power P4 is controlled to decrease until the power p1=the generated power p2+the energy storage discharge power p3+the grid power P4. For example, the power consumption P1 is 2.5kW, the power generation P2 is 1kW, the energy storage and discharge power P3 is 0.8kW, and the power grid power P4 is 1kW, so that the energy storage and discharge power P3 is controlled to rise to 1kW, and the power grid power P4 is controlled to fall to 0.5kW.
S16, judging the relation between the power consumption P1 and the power generation P2, if the power consumption P1 is larger than the power generation P2, executing step S17, and if the power consumption P1 is smaller than the power generation P2, executing step S18.
S17, controlling the grid power P4 to drop to 0, and reducing the energy storage discharge power P3 until the power p1=the generated power p2+the energy storage discharge power P3. For example, when the power consumption P1 is 1.5kW, the generated power P2 is 1kW, and the energy storage and discharge power P3 is 1kW, the grid power P4 is controlled to be 0, and the energy storage and discharge power P3 is controlled to be reduced to 0.5kW.
S18, judging the relation between the power consumption P1, the power generation P2 and the energy storage charging power P5, if the power consumption P1 is larger than the power generation P2-energy storage charging power P5, executing the step S19, and if the power consumption P1 is smaller than the power generation P2-energy storage charging power P5, executing the step S20.
S19, controlling the stored energy charging power P5 to decrease until the power p1=the generated power P2-the stored energy charging power P5. For example, when the power consumption P1 is 0.5kW, the generated power P2 is 0.8kW, and the stored energy charging power P5 is 0.5kW, the stored energy charging power P5 is controlled to be reduced to 0.3kW.
S20, controlling the stored energy charging power P5 to rise until the power p1=the generated power P2-the stored energy charging power P5. For example, when the power consumption P1 is 0.5kW, the generated power P2 is 1kW, and the stored energy charging power P5 is 0.3kW, the stored energy charging power P5 is controlled to be raised to 0.5kW.
By the power supply power adjusting method of the embodiment, an efficient and reliable demand side response mechanism is established; the optimized power generation power, energy storage discharge power, power consumption power and grid power solve the technical problem of unbalanced supply and demand, and the construction investment of a power supply infrastructure is greatly reduced.
Example 6
The embodiment provides a power supply system, which comprises the power supply power adjusting device and is used for realizing electric energy supply and demand balance.
Example 7
The present embodiment provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the above-described power supply adjustment method.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A method for adjusting power supplied to a power supply system, the method comprising:
acquiring the power consumption and power supply parameters of the power supply system, wherein the power supply parameters comprise: generating power, grid power, energy storage discharging power and energy storage charging power; triggering to determine a power supply mode of a power grid if the power consumption is less than the generated power, the power grid power and the energy storage discharge power;
determining a power supply mode of a power grid; the power grid power supply mode comprises a constant power mode and a limited power mode;
based on a scheduling strategy corresponding to the power grid power supply mode, carrying out power supply adjustment according to the quantity relation between the power consumption power and the power supply power parameters; and if the power grid power supply mode is a constant power mode, performing power supply power adjustment according to the number relation between the power consumption power and the power supply power parameters based on a scheduling strategy corresponding to the power grid power supply mode, wherein the power supply adjustment comprises the following steps:
if the generated power and the grid power are less than the used power and less than the generated power and the grid power and the energy storage and discharge power, the generated power is controlled to be unchanged, and the energy storage and discharge power is controlled to be reduced until the used power = the generated power and the grid power and the energy storage and discharge power;
if the generated power and the grid power-stored charging power are less than the used power and less than the generated power and the grid power, controlling the generated power to be unchanged, and simultaneously controlling the stored charging power to be reduced until the used power = the generated power and the grid power-stored charging power;
and if the electric power is less than the generated power and the grid power-energy storage charging power, controlling the energy storage charging power to be unchanged, simultaneously controlling a grid power supply mode to be switched to a limited power mode, and reducing the grid power until the electric power is less than the generated power and the grid power-energy storage charging power.
2. The method according to claim 1, wherein if the grid power mode is a power mode, performing power supply adjustment according to the number relationship between the power usage and power supply parameters based on a scheduling policy corresponding to the grid power mode, comprises:
if the generated power and the energy storage discharge power are less than the generated power, the power grid power and the energy storage discharge power, controlling the energy storage discharge power to rise to the maximum value, and reducing the power grid power until the generated power = the generated power, the power grid power and the energy storage discharge power;
if the generated power is less than the used power and less than the generated power plus the energy storage discharge power, controlling the power of the power grid to be reduced to zero, and simultaneously controlling the energy storage discharge power to be reduced until the used power = the generated power plus the energy storage discharge power;
if the generated power-the stored energy charging power < the used electric power < the generated power, controlling the stored energy charging power to be reduced until the generated power-the stored energy charging power = the used electric power;
and if the electric power is less than the generated power and the stored energy charging power, controlling the stored energy charging power to rise until the electric power is less than the generated power and the stored energy charging power.
3. The method of claim 1, wherein prior to determining the grid power mode, the method further comprises:
judging whether the power consumption is larger than the generated power, the grid power and the energy storage discharge power or not;
and if so, controlling the electric power to be reduced step by step until the electric power=the generated power+the grid power+the energy storage and discharge power.
4. A method according to claim 3, wherein controlling the step-wise decrease of the power comprises:
according to a preset grade, controlling the power consumption to be reduced by one grade;
judging whether the power consumption is larger than the generated power, the grid power and the energy storage discharge power or not;
and if so, controlling the electric power to be reduced by one step until the electric power=the generated power+the grid power+the energy storage discharge power.
5. A method according to claim 3, wherein prior to controlling the gradual decrease in the electrical power, the method further comprises:
judging whether the energy storage discharge power reaches the maximum value or not;
if yes, triggering and controlling the power consumption to be gradually reduced;
if not, controlling the energy storage discharge power to rise to the maximum value;
judging whether the power consumption is larger than the generated power, the grid power and the energy storage discharge power or not;
if yes, triggering and controlling the power consumption to be gradually reduced;
if not, stopping the supply power regulation if the electric power=the generated power+the grid power+the energy storage discharge power.
6. A power supply adjusting apparatus for implementing the power supply adjusting method according to any one of claims 1 to 5, characterized in that the apparatus comprises:
the parameter acquisition module is used for acquiring the power consumption and the power supply parameters of the power supply system; wherein the power supply parameters include: generating power, grid power, energy storage discharging power and energy storage charging power;
the mode determining module is used for determining a power supply mode of the power grid; the power grid power supply mode comprises a constant power mode and a limited power mode;
the adjusting module is used for adjusting the power supply according to the quantity relation between the power consumption and the power supply parameters according to different scheduling strategies in different power grid power supply modes, and comprises: a first adjusting unit for:
when the generated power and the grid power are less than the used power and less than the generated power and less than the grid power and less than the energy storage discharge power, the generated power is controlled to be unchanged, and the energy storage discharge power is controlled to be reduced until the used power = the generated power and less than the grid power and less than the energy storage discharge power;
when the generated power and the grid power-stored charging power are less than the used power and less than the generated power and the grid power, the generated power is controlled to be unchanged, and the stored charging power is controlled to be reduced until the used power = the generated power and the grid power-stored charging power;
when the power consumption is less than the power generation power and the power grid power-energy storage charging power, the energy storage charging power is controlled to be unchanged, meanwhile, the power grid power supply mode is controlled to be switched to a power limiting mode, and the power grid power is reduced until the power consumption is less than the power generation power and the power grid power-energy storage charging power.
7. A power supply system characterized in that it comprises the power supply power adjusting device according to claim 6.
8. A computer readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the method according to any one of claims 1 to 5.
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| PCT/CN2021/105759 WO2022105265A1 (en) | 2020-11-17 | 2021-07-12 | Power supply power adjusting method and apparatus, and power supply system |
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| CN109494796A (en) * | 2018-11-28 | 2019-03-19 | 北京科诺伟业科技股份有限公司 | A kind of light stores up network control method on the invariable power of micro-grid system |
| CN110661278A (en) * | 2019-09-12 | 2020-01-07 | 珠海格力电器股份有限公司 | Energy storage air conditioning system and control method and control device thereof |
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| CN104283227A (en) * | 2014-10-30 | 2015-01-14 | 阳光电源股份有限公司 | System and method for managing energy of micro-grid |
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