CN112383096A - Power supply power adjusting method and device and power supply system - Google Patents
Power supply power adjusting method and device and power supply system Download PDFInfo
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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
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Abstract
The invention discloses a power supply power adjusting method, a power supply power adjusting device and a power supply system. Wherein, the method comprises the following steps: acquiring the power consumption power and the power supply power parameter 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 power limit mode; and adjusting the power supply power according to the quantity relation between the power consumption power and the power supply power parameters based on a scheduling strategy corresponding to the power supply mode of the power grid. According to the invention, the power supply quantity can be accurately adjusted according to the power consumption requirement under different power grid power supply modes, and the situations of electric energy waste 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 power supply power adjusting device and a power supply system.
Background
At present, one of the existing energy control modes is to separately adjust two ends of a power supply end and a power utilization end, the power supply end increases the supply of energy, the supply of energy is ensured to be abundant, the power utilization end increases the development of energy-saving products, so that the energy is saved to the maximum extent, the utilization efficiency of power load energy is improved, and the improvement directions of the power supply end and the power utilization end of the adjusting scheme are completely independent and are not effectively linked.
According to the other scheme, part or all of the power grid side, the power generation side and the energy storage side are scheduled to supply power to the power utilization side according to the power utilization requirement, but no adjustment scheme aiming at the power of each power supply side is provided, and the difference of power adjustable ranges is not considered when the power grid supplies power at constant power and supplies power at limited power, so that the adjustment mode cannot realize accurate adjustment of the power supply quantity according to the power utilization requirement.
The problem of can't be according to the accurate power supply volume of adjusting of power demand among the prior art, the effectual solution has not been proposed yet at present.
Disclosure of Invention
The embodiment of the invention provides a power supply power adjusting method, a power supply power adjusting device and a power supply system, and aims to solve the problem that the power supply quantity cannot be accurately adjusted according to power consumption requirements in the prior art.
In order to solve the above technical problem, the present invention provides a power supply power adjusting method, which is applied to a power supply system, and the method includes:
acquiring the power consumption power and the power supply power parameter 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 power limit mode;
and adjusting the power supply power according to the quantity relation between the power consumption power and the power supply power parameters based on a scheduling strategy corresponding to the power supply mode of the power grid.
Further, the power supply parameters include: the power generation system comprises power generation power, power grid power, energy storage discharge power and energy storage charging power.
Further, if the grid power supply mode is a constant power mode, based on a scheduling policy corresponding to the grid power supply mode, adjusting power supply according to a quantity relationship between the power consumption and power supply parameters, including:
if the power generation power + the power grid power < the power consumption power < the power generation power + the power grid power + the energy storage discharge power, controlling the power generation power to keep unchanged, and controlling the energy storage discharge power to reduce until the power consumption power is equal to the power generation power + the power grid power + the energy storage discharge power;
if the power generation power + the power grid power-energy storage charging power is smaller than the power utilization power smaller than the power generation power + the power grid power, controlling the power generation power to be kept unchanged, and simultaneously controlling the energy storage charging power to be reduced until the power utilization power is equal to the power generation power + the power grid power-energy storage charging power;
and if the power consumption power is less than the power generation power + the power grid power-energy storage charging power, controlling the energy storage charging power to keep unchanged, simultaneously controlling a power supply mode of the power grid to be switched to a power limiting mode, and reducing the power grid power until the power consumption power is equal to the power generation power + the power grid power-energy storage charging power.
Further, if the grid power supply mode is a limited power mode, based on a scheduling policy corresponding to the grid power supply mode, adjusting the power supply power according to the quantity relationship between the power consumption power and the power supply power parameter, including:
if the power generation power + the energy storage discharge power is less than the power utilization power less than the power generation power + the power grid power + the energy storage discharge power, controlling the energy storage discharge power to be increased to a maximum value, and simultaneously reducing the power grid power until the power utilization power is equal to the power generation power + the power grid power + the energy storage discharge power;
if the generated power is less than the power utilization power, less than the generated power and the stored energy discharge power, controlling the power grid power to be reduced to zero, and simultaneously controlling the stored energy discharge power to be reduced until the power utilization power is equal to the generated power and the stored energy discharge power;
if the generated power-the stored energy charging power is less than the electricity utilization power and less than the electricity generation power, controlling the stored energy charging power to be reduced until the generated power-the stored energy charging power is equal to the electricity utilization power;
and if the power utilization power is less than the power generation power and the energy storage charging power, controlling the energy storage charging power to be increased until the power utilization power is equal to the power generation power and the energy storage charging power.
Further, before determining the grid power supply mode, the method further includes:
judging whether the power utilization power is greater than the power generation power, the power grid power and the energy storage discharge power;
and if so, controlling the power consumption to be reduced step by step until the power consumption is equal to the generated power, the power grid power and the energy storage and discharge function.
Further, controlling the electric power to be reduced step by step comprises:
controlling the power consumption to be reduced by one level according to a preset level;
judging whether the power utilization power is greater than the power generation power, the power grid power and the energy storage discharge power;
and if so, controlling the power consumption to reduce by one step again until the power consumption is equal to the generated power + the power grid power + the energy storage discharge power.
Further, before controlling the step-by-step reduction of the power consumption, the method further comprises:
judging whether the energy storage discharge power reaches the maximum value;
if yes, triggering and controlling the power consumption to be reduced step by step;
if not, controlling the energy storage discharge power to be increased to the maximum value;
judging whether the power utilization power is greater than the power generation power, the power grid power and the energy storage discharge power;
if yes, triggering and controlling the power consumption to be reduced step by step;
if not, if the power consumption power is equal to the generated power, the power grid power and the energy storage discharge power, stopping power supply power regulation; and if the power consumption power is less than the power generation power, the power grid power and the energy storage discharge power, triggering to determine a power supply mode of the power grid.
The invention also provides a power supply power adjusting device, which is used for realizing the power supply power adjusting method and comprises the following steps:
the parameter acquisition module is used for acquiring the power consumption and power supply parameters of the power supply system; wherein the supply power parameters include: generating power, 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 a power grid; the power grid power supply mode comprises a constant power mode and a power limit 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 power adjustment method.
By applying the technical scheme of the invention, firstly, the power consumption power and the power supply power parameter of the power supply system are obtained; then determining a power supply mode of a power grid; based on the scheduling strategy corresponding to the power grid power supply mode, the power supply power is adjusted according to the quantity relation between the power utilization power and the power supply power parameter, the power supply quantity can be accurately adjusted according to the power utilization requirement in different power grid power supply modes, and the situations of electric energy waste 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 invention;
fig. 3 is a block diagram of a power supply power adjusting apparatus according to an embodiment of the present invention;
fig. 4 is a block diagram of a power supply power adjusting apparatus according to another embodiment of the present invention;
fig. 5 is a flowchart of a method for adjusting power supplied in a constant power mode according to an embodiment of the present invention;
fig. 6 is a flowchart of a method for adjusting power supplied 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 clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. 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 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 the examples of the present invention 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, and "a plurality" typically includes at least two.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in 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 phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article 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 article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in the article or device in which the element is included.
Alternative embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Example 1
The present embodiment provides a method for adjusting power supply, which is applied to a power supply system, and fig. 1 is a structural diagram of the power supply system according to the embodiment of the present invention, as shown in fig. 1, the system includes: the device comprises a photovoltaic power generation device 1 for outputting power generation power; the power grid 2 is used for outputting power of the power grid; the energy storage battery 3 is used for outputting energy storage discharge power and inputting energy storage charging power, wherein the energy storage charging power is a negative value; the device also comprises a direct current load 4 and an alternating current load 5, and the sum of the power required by the direct current load and the alternating current load is used power.
Fig. 2 is a flowchart of a power supply power adjusting method according to an embodiment of the present invention, as shown in fig. 2, the method includes:
and S101, acquiring the power consumption and power supply parameters of the power supply system.
In a specific implementation process, in order to avoid a situation of imbalance in supply and demand, such as excessive supply of energy, or insufficient supply of energy due to the fact that the supply power exceeds the power consumption power, or the supply power is smaller than the power consumption power, it is desirable that the supply power and the power consumption power are basically balanced, and in order to finally achieve the purpose, the power consumption power and the supply power parameter of the power supply system need to be obtained first.
S102, determining a power supply mode of a power grid; the power grid power supply mode comprises a constant power mode and a power limit mode.
The power supply modes of the power grid are divided into a constant power mode and a power limiting mode, the power supply power of the power grid cannot be adjusted in the constant power mode, and the power supply power of the power grid can be adjusted within a certain range in the power limiting mode.
And S103, adjusting the power supply power according to the quantity relation between the power consumption power and the power supply power parameters based on a scheduling strategy corresponding to the power supply mode of the power grid.
In the power supply power adjusting method of this embodiment, first, power consumption power and power supply power parameters of the power supply system are obtained; then determining a power supply mode of a power grid; based on the scheduling strategy corresponding to the power grid power supply mode, the power supply power is adjusted according to the quantity relation between the power utilization power and the power supply power parameter, the power supply quantity can be accurately adjusted according to the power utilization requirement in different power grid power supply modes, and the situations of electric energy waste or insufficient power supply quantity are avoided.
Example 2
In this embodiment, another method for adjusting power supply is provided, because the power supply device in this embodiment includes the photovoltaic power generation device 1, the power grid 2, and the energy storage battery 3, the power supply parameters include: the power generation system comprises power generation power, power grid power, energy storage discharge power and energy storage charging power.
As described above, in different grid power supply modes, the adjustment strategy of the power supply power is different, and since the grid power is a fixed value in the constant power mode, if the grid power supply mode is the constant power mode, based on the scheduling strategy corresponding to the grid power supply mode, the power supply power adjustment is performed according to the quantitative relationship between the power consumption power and the power supply power parameter, including: if the power generation power + the power grid power < the power consumption power < the power generation power + the power grid power + the energy storage discharge power, the sum of the power generation power, the power grid power and the energy storage discharge power is larger than the power consumption power, and if the current power of the three is continuously maintained, excessive supply is caused, so that the power supply power can be reduced, but the power grid power is a constant value and cannot be changed, the power regulation of the energy storage battery is the simplest and fastest, and the method is easy to realize, so that the power generation power is controlled to be kept unchanged, and the energy storage discharge power is controlled to be reduced until the power consumption power is equal to the power generation power + the power grid power + the energy;
if the power generation power + the power grid power-the energy storage charging power is less than the power consumption power < the power generation power + the power grid power, the situation that the power supply is insufficient if the current power is kept for energy storage charging is shown, so that the power generation power is controlled to be kept unchanged, and the energy storage charging power is controlled to be reduced until the power consumption power is equal to the power generation power + the power grid power-the energy storage charging power;
if the power consumption is less than the power generation power + the power grid power-energy storage charging power, the current power consumption requirement is low, in order to guarantee the charging speed, the energy storage charging power can be controlled to be unchanged, the power grid power supply mode is controlled to be switched to the power limiting mode, and the power grid power is reduced until the power consumption is equal to the power generation power + the power grid power-energy storage charging power.
Because the power of the power grid can be adjusted within a certain range in the constant power mode, if the power supply mode of the power grid is the limited power mode, the power supply power adjustment is performed 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, and the method comprises the following steps: if the power generation power + the energy storage discharge power is less than the power consumption power is less than the power generation power + the power grid power + the energy storage discharge power, the energy storage battery is used for supplying power preferentially because the charge and discharge control of the energy storage battery is easier to realize, specifically, the energy storage discharge power is controlled to be increased to the maximum value, and the power grid power is reduced at the same time until the power consumption power is equal to the power generation power + the power grid power + the energy storage discharge power;
if the power generation power is less than the power consumption power and less than the power generation power plus the energy storage discharge power, the current power generation power and the energy storage discharge power can meet the power consumption power and have margins, but the discharge of the energy storage battery is completely closed, so that the power supply power is insufficient, in order to ensure sufficient electric energy supply and avoid waste, the power of a power grid can be controlled to be reduced to zero, and the energy storage discharge power is controlled to be reduced until the power consumption power is equal to the power generation power plus the energy storage discharge power;
if the generated power-energy storage charging power is less than the electricity consumption power and less than the generated power, the table shows that if the energy storage battery stops charging at the moment, the electric energy is excessively supplied, but if the energy storage battery is charged according to the current charging power, the electric energy is insufficiently supplied, so that the energy storage charging power is controlled to be reduced until the generated power-energy storage charging power is equal to the electricity consumption power in order to realize the supply and demand balance;
if the power consumption is less than the power generation power-energy storage charging power, 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 is equal to the power generation power-energy storage charging power.
When the power consumption is less than the sum of the powers provided by all the power supply devices, the power supply power of part of the power supply devices can be reduced, but if the power consumption is less than the sum of the powers provided by all the power supply devices, the power consumption needs to be adjusted instead of the power supply power, so that before the power grid supply mode is determined, the method further comprises the following steps:
judging whether the power consumption power is greater than the generating power, the power grid power and the energy storage discharging power; and if so, controlling the power consumption to be reduced step by step until the power consumption is equal to the generated power, the power grid power and the energy storage discharge power, and stopping power supply power regulation. Specifically, the step-by-step reduction of the electric power is controlled, and the step-by-step reduction of the electric power comprises the following steps: controlling the power consumption to be reduced by one level according to a preset level; judging whether the power consumption power is greater than the generating power, the power grid power and the energy storage discharging power; if so, controlling the power consumption to be reduced by one step again until the power consumption is equal to the generated power, the power grid power and the stored energy discharge power, and stopping power supply power regulation.
The stored energy discharge power has a certain range, is not always at the maximum value, and if the power consumption power is greater than the power generation power, the power grid power and the stored energy discharge power, the current stored energy discharge power may not reach the maximum value, so that before the power consumption power is controlled to be reduced step by step, the method further comprises the following steps: whether the energy storage discharge power is cut off to reach the maximum value or not; if yes, the power consumption for controlling is triggered to be reduced step by step; if not, controlling the energy storage discharge power to be increased to the maximum value; judging whether the power consumption power is greater than the power generation power, the power grid power and the energy storage discharge power; if yes, the power consumption for controlling is triggered to be reduced step by step; if not, two conditions exist, and if the power consumption is equal to the generated power, the power grid power and the stored energy discharge power, the power supply power regulation is stopped; and if the power consumption power is less than the power generation power, the power grid power and the energy storage discharge power, triggering to determine the power supply mode of the power grid.
Example 3
The present embodiment provides a power supply power adjusting apparatus for implementing the power supply power adjusting method, and fig. 3 is a structural diagram of the power supply power adjusting apparatus according to the embodiment of the present invention, as shown in fig. 3, the apparatus includes:
a parameter obtaining module 10, configured to obtain power consumption and power supply parameters of the power supply system; wherein the supply power parameters include: the power generation system comprises power generation power, power grid power, energy storage discharge power and energy storage charging power.
In a specific implementation process, in order to avoid a situation that supply power exceeds power consumption power, which causes excessive supply of energy, or supply power is smaller than power consumption power, which causes imbalance of supply and demand, such as insufficient supply of energy, and the like, people hope that supply power and power consumption power are basically balanced, and in order to finally achieve the purpose, the parameter acquisition module 10 needs to be set to acquire power consumption power and supply power parameters of a power supply system.
A mode determination module 20, configured to determine a grid power supply mode; the power grid supply mode comprises a constant power mode and a power limit mode.
The power supply modes of the power grid are divided into a constant power mode and a power limiting mode, the power supply power of the power grid cannot be adjusted in the constant power mode, and the power supply power of the power grid can be adjusted within a certain range in the power limiting mode.
And the adjusting module 30 is configured to adjust the power supply power according to the quantity relationship between the power consumption power and the power supply power parameter according to different scheduling strategies in different power grid power supply modes.
In the power supply power adjusting device of the present embodiment, the parameter obtaining module 10 obtains the power consumption power and the power supply power parameter of the power supply system; then, determining a power supply mode of the power grid through a mode determination module 20; finally, the adjusting module 30 adjusts the power supply power according to the quantity relationship between the power consumption power and the power supply power parameters based on the scheduling strategy corresponding to the power grid power supply mode in different power grid power supply modes, so that the power supply quantity can be accurately adjusted according to the power consumption requirements in different power grid power supply modes, and the situations of electric energy waste or insufficient power supply quantity are avoided.
Example 4
In this embodiment, another power supply adjusting apparatus is provided, and fig. 4 is a structural diagram of a power supply adjusting apparatus according to another embodiment of the present invention, as described above, in different power grid supply modes, power supply adjusting strategies are different, and since the power grid power is a fixed value in a constant power mode, as shown in fig. 4, the adjusting module 30 includes: the first adjusting unit 301 is provided with a first adjusting unit,
the method is used for controlling the power supply of the power grid in a constant power mode, based on a scheduling strategy corresponding to the power supply mode of the power grid, the supply power adjustment is performed according to the quantitative relationship between the power consumption and the supply power parameters, and, specifically, when the power generation power + the power grid power is less than the power consumption power is less than the power generation power + the power grid power + the energy storage discharge power, the sum of the generated power, the power grid power and the stored energy discharge power is larger than the power utilization power, if the current power of the three is continuously maintained, the over supply is caused, so that the power supply power can be reduced, but the power of the power grid is a constant value and cannot be changed, the power regulation of the energy storage battery is the simplest and the quickest and is easy to realize, therefore, at this time, the first adjusting unit 301 controls the generated power to remain unchanged, and controls the stored energy discharging power to decrease until the power consumption is equal to the generated power + the grid power + the stored energy discharging power;
when the power generation power + the grid power-the energy storage charging power is less than the power consumption power < the power generation power + the grid power, it is indicated that if the current power is maintained for energy storage charging, insufficient power is supplied, so that the power generation power is controlled to be kept unchanged by the first adjusting unit 301, and the energy storage charging power is controlled to be reduced at the same time until the power consumption power is equal to the power generation power + the grid power-the energy storage charging power.
When the power consumption is less than the power generation power + the power grid power-the energy storage charging power, it indicates that the current power consumption demand is small, and in order to ensure the charging speed, at this time, the first adjusting unit 301 controls the energy storage charging power to be kept unchanged, and simultaneously controls the power grid power supply mode to be switched to the power limiting mode, and reduces the power grid power until the power consumption is equal to the power generation power + the power grid power-the energy storage charging power.
Since the grid power can be adjusted within a certain range in the constant power mode, the adjusting module 30 includes: the second adjusting unit 302 is configured to adjust the power supply according to a quantity relationship between power consumption and power supply parameters based on a scheduling policy corresponding to a power grid power supply mode, and specifically, when the power generation + the energy storage discharge power < the power consumption < the power generation + the power grid power + the energy storage discharge power, since charge and discharge control of the energy storage battery is easier to implement, the energy storage battery is preferentially used for supplying power, and therefore, the energy storage discharge power is controlled to be increased to a maximum value by the second adjusting unit 302, and the power grid power is reduced at the same time until the power consumption is equal to the power generation + the power grid power + the energy storage discharge power.
When generating power < power consumption < generating power + energy storage discharge power, then show that generating power and energy storage discharge power can satisfy the power consumption power at present to there is the surplus, but close the discharge of energy storage battery completely, again can lead to power supply not enough, avoid extravagant simultaneously in order to guarantee that the electric energy supply is sufficient, can reduce to zero through second regulating unit 302 control electric wire netting power, the while control energy storage discharge power reduces, until power consumption power is generating power + energy storage discharge power.
When the generated power-stored charging power < the used power < the generated power, the table indicates that if the energy storage battery stops charging at this time, the electric energy is excessively supplied, but if the energy storage battery is charged according to the current charging power, the electric energy is insufficiently supplied, so that the stored charging power is controlled to be reduced by the second adjusting unit 302 until the generated power-stored charging power is equal to the used power in order to achieve supply and demand balance.
When the power consumption is less than the power generation-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 may be controlled to increase by the second adjusting unit 302 until the power consumption is equal to the power generation-energy storage charging power.
When the power consumption is less than the sum of the powers provided by all the power supply devices, the power supply power of part of the power supply devices may be reduced, but if the power consumption is less than the sum of the powers provided by all the power supply devices, the power consumption needs to be adjusted instead of the power supply power, and therefore, the adjusting module further comprises:
the first judging unit 303 is configured to judge whether the power consumption power is greater than the power generation power, the grid power, and the energy storage discharge power; 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 + the energy storage discharge power, and stop power supply adjustment until the power consumption is equal to the generated power + the grid power + the energy storage discharge power.
The third adjusting unit 304 is specifically configured to: controlling the power consumption to be reduced by one level according to a preset level; judging whether the power consumption power is greater than the generating power, the power grid power and the energy storage discharging power; if so, controlling the power consumption to be reduced by one step again until the power consumption is equal to the generated power, the power grid power and the stored energy discharge power, and stopping power supply power regulation.
The energy storage discharge power has a certain range, and is not at the maximum value at all times, if the power consumption power is greater than the power generation power + the grid power + the energy storage discharge power, the current energy storage discharge power may not reach the maximum value, therefore, the adjusting module 30 further includes:
a second determining unit 305 for determining whether the energy storage discharge power reaches a maximum value; the third adjusting unit 304 is used for triggering the control power consumption to be reduced step by step when the energy storage discharge power reaches the maximum value;
the adjusting module 30 further includes: the fourth adjusting unit 306 is configured to control the energy storage discharge power to increase to the maximum value when the energy storage discharge power does not reach the maximum value;
then, the first judgment unit 303 judges whether the power consumption power is greater than the power generation power, the grid power and the energy storage discharge power; in the case of yes, the third adjusting unit 304 controls the power consumption to be reduced step by step; under the condition of no, the power supply power regulation is stopped when the power consumption is equal to the generated power, the power grid power and the stored energy discharge power; and when the power consumption is less than the power generation power, the power grid power and the energy storage discharge power, the control mode determining module 20 determines the power supply mode of the power grid.
Example 5
The present embodiment provides a supply power adjusting method applied to a power supply system as shown in fig. 1 mentioned above, wherein the device for supplying power includes a photovoltaic power generation device 1 for supplying power for power generation; a grid 2 for providing grid power; the energy storage battery 3 is used for providing energy storage discharge power P3 and energy storage charging power P5, wherein the energy storage charging power P5 is a negative value; the device also comprises a direct current load 4 and an alternating current load 5, and the sum of the power required by the direct current load and the alternating current load is used power. If in the initial state, the proportion of the generating power, the energy storage discharge power P3, the power grid power and the power consumption power P1 is 1: 1: 1: 3, for example, the generated power P2 is 1kW, the stored energy discharge power P3 is 1kW, the power grid power is 1kW, and the power consumption power P1 is 3kW, and the power supply system stabilizes the DC bus voltage by adjusting stored energy charging and discharging.
Fig. 5 is a flowchart of a method for adjusting power supplied in a constant power mode according to an embodiment of the present invention, as shown in fig. 5, the method includes:
and 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 stored energy discharge power P3, the grid power, and the power consumption power P1 is 1: 1: 1: 3, for example, the generated power P2 is 1kW, the stored energy discharge power P3 is 1kW, the power grid power is 1kW, and the power consumption power P1 is 3kW, and the power supply system stabilizes the DC bus voltage by adjusting stored energy charging and discharging.
And S2, judging the magnitude relation between the power consumption P1 and the power generation P2, the energy storage discharge power P3 and the power grid, executing a step S3 if the power consumption P1 is more than the power generation P2+ the energy storage discharge power P3+ the power grid P4, and executing a step S4 if the power consumption P1 is less than the power generation P2+ the energy storage discharge power P3+ the power grid P4.
And S3, reducing the power consumption P1 step by step according to a comfort level, an environment level, a function level and an emergency level until the power consumption P1 is equal to the generated power P2+ the energy storage discharge power P3+ the power grid power P4. For example, if the power consumption P1 is 4kW, the power generation P2 is 1kW, the energy storage discharge power P3 is 1kW, and the grid power P4 is 1kW, the power consumption P1 needs to be reduced to 3 kW. Wherein, the power consumption of comfort level is more than the power consumption of environment level is more than the power consumption of functional level is more than the power consumption of emergency level.
S4, judging the magnitude relation between the power consumption P1 and the power generation P2 and the energy storage discharge power P3, executing step S5 if the power consumption P1 is more than the power generation P2+ the energy storage discharge power P3, and executing step S6 if the power consumption P1 is less than the power generation P2+ the energy storage discharge power P3.
And S5, controlling the generated power P2 to be kept unchanged, and reducing the stored energy discharging power P3 until the power utilization power P1 is equal to the generated power P2+ the stored energy discharging power P3. When the power grid enters a constant power mode, the power grid power P4 is kept unchanged, the control generating power P2 is also kept unchanged, and the power supply power of the whole power supply system is regulated through the energy storage discharging 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 0.5 kW.
S6, judging the magnitude relation between the power consumption P1 and the power generation P2, the grid power P4 and the energy storage charging power P5, executing a step S7 if the power consumption P1 is greater than the power generation P2+ the grid power P4-energy storage charging power P5, and executing a step S8 if the power consumption P1 is less than the power generation P2+ the grid power P4-energy storage charging power P5.
And S7, controlling the energy storage charging power P5 to be reduced until the power consumption P1 is equal to the power generation power P2+ the power 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 grid power P4 is 1kW, and the energy storage charging power P5 is 1kW, so that the energy storage charging power P5 is reduced to 0.5 kW.
And S8, entering a limited power operation mode, and reducing the power grid power P4 until the power consumption power P1 is 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 power generation P2 is 1kW, the grid power P4 is 1kW, and the energy storage charging power P5 is 0.5kW, the grid power P4 is reduced to 0.5 kW.
Fig. 6 is a flowchart of a method for adjusting power supplied in a constant power mode according to an embodiment of the present invention, as shown in fig. 6, the method includes:
and S11, controlling the power grid to enter a power limiting mode. Under 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 stored energy 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 stored energy discharge power P3 is 1kW, the grid power P4 is 1kW, and the power consumption power P1 is 3kW, and the power supply system stabilizes the DC bus voltage by adjusting stored energy charging and discharging.
S12, judging the magnitude relation between the power consumption P1 and the power generation P2, the energy storage discharge power P3 and the power grid P4, executing a step S13 if the power consumption P1 is larger than the power generation P2+ the energy storage discharge power P3+ the power grid P4, and executing a step S14 if the power consumption P1 is smaller than the power generation P2+ the energy storage discharge power P3+ the power grid P4.
And S13, reducing the power consumption P1 step by step according to a comfort level, an environment level, a function level and an emergency level until the power consumption P1 is equal to the generated power P2+ the energy storage discharge power P3+ the power grid power P4. For example, if the power consumption P1 is 4kW, the power generation P2 is 1kW, the energy storage discharge power P3 is 1kW, and the grid power P4 is 1kW, the power consumption P1 needs to be reduced by 3kW, where comfort-level power consumption > environmental-level power consumption > functional-level power consumption > emergency-level power consumption.
S14, judging the magnitude relation among the power consumption P1, the power generation P2 and the energy storage discharge power P3, executing a step S15 if the power consumption P1 is more than the power generation P2+ the energy storage discharge power P3, and executing a step S16 if the power consumption P1 is less than the power generation P2+ the energy storage discharge power P3.
And S15, controlling the stored energy discharging power P3 to rise to the maximum value, and controlling the grid power P4 to decrease until the power utilization power P1 is equal to the generated power P2+ the stored energy discharging power P3+ the grid power P4. For example, if the power consumption P1 is 2.5kW, the power generation P2 is 1kW, the energy storage discharge power P3 is 0.8kW, and the grid power P4 is 1kW, the energy storage discharge power P3 is controlled to increase to 1kW, and the grid power P4 is controlled to decrease to 0.5 kW.
S16, judging the relation between the power consumption P1 and the power generation P2, if the power consumption P1 is more than the power generation P2, executing step S17, and if the power consumption P1 is less than the power generation P2, executing step S18.
And S17, controlling the power grid power P4 to be reduced to 0, and reducing the energy storage discharge power P3 until the power consumption power P1 is equal to the power generation power P2+ the energy storage discharge power P3. For example, if the power consumption P1 is 1.5kW, the power generation P2 is 1kW, and the energy storage discharge power P3 is 1kW, the grid power P4 is controlled to 0, and the energy storage discharge power P3 is controlled to be reduced to 0.5 kW.
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 more than the power generation P2-the energy storage charging power P5, executing the step S19, and if the power consumption P1 is less than the power generation P2-the energy storage charging power P5, executing the step S20.
And S19, controlling the stored energy charging power P5 to be reduced until the power utilization power P1 is equal to the generated power P2-stored energy charging power P5. For example, when the power consumption P1 is 0.5kW, the power generation P2 is 0.8kW, and the energy storage charging power P5 is 0.5kW, the energy storage charging power P5 is controlled to be reduced to 0.3 kW.
And S20, controlling the stored energy charging power P5 to increase until the power utilization power P1 is equal to the generated power P2-stored energy charging power P5. For example, if the power consumption P1 is 0.5kW, the power generation P2 is 1kW, and the energy storage charging power P5 is 0.3kW, the energy storage charging power P5 is controlled to be increased to 0.5 kW.
By the power supply power adjusting method, a high-efficiency and reliable demand side response mechanism is established; the optimized power generation power, the energy storage discharge power, the power utilization power and the power grid power solve the technical problem of unbalanced supply and demand, and the construction investment of power supply infrastructure is greatly reduced.
Example 6
The embodiment provides a power supply system, which includes the above 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 on which a computer program is stored, which when executed by a processor implements the above-described power supply power adjustment method.
The above-described embodiments of the apparatus are merely illustrative, and 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 modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present 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 solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A power supply power regulation method is applied to a power supply system and is characterized by comprising the following steps:
acquiring the power consumption power and the power supply power parameter 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 power limit mode;
and adjusting the power supply power according to the quantity relation between the power consumption power and the power supply power parameters based on a scheduling strategy corresponding to the power supply mode of the power grid.
2. The method of claim 1, wherein the supply power parameter comprises: the power generation system comprises power generation power, power grid power, energy storage discharge power and energy storage charging power.
3. The method according to claim 2, wherein if the grid power supply mode is a constant power mode, performing power supply power adjustment according to a quantity relation between the power consumption and power supply parameters based on a scheduling policy corresponding to the grid power supply mode, comprises:
if the power generation power + the power grid power < the power consumption power < the power generation power + the power grid power + the energy storage discharge power, controlling the power generation power to keep unchanged, and controlling the energy storage discharge power to reduce until the power consumption power is equal to the power generation power + the power grid power + the energy storage discharge power;
if the power generation power + the power grid power-energy storage charging power is smaller than the power utilization power smaller than the power generation power + the power grid power, controlling the power generation power to be kept unchanged, and simultaneously controlling the energy storage charging power to be reduced until the power utilization power is equal to the power generation power + the power grid power-energy storage charging power;
and if the power consumption power is less than the power generation power + the power grid power-energy storage charging power, controlling the energy storage charging power to keep unchanged, simultaneously controlling a power supply mode of the power grid to be switched to a power limiting mode, and reducing the power grid power until the power consumption power is equal to the power generation power + the power grid power-energy storage charging power.
4. The method according to claim 2, wherein if the grid power supply mode is a limited power mode, performing power supply power adjustment according to a quantity relation between the power consumption and power supply parameters based on a scheduling policy corresponding to the grid power supply mode comprises:
if the power generation power + the energy storage discharge power is less than the power utilization power less than the power generation power + the power grid power + the energy storage discharge power, controlling the energy storage discharge power to be increased to a maximum value, and simultaneously reducing the power grid power until the power utilization power is equal to the power generation power + the power grid power + the energy storage discharge power;
if the generated power is less than the power utilization power, less than the generated power and the stored energy discharge power, controlling the power grid power to be reduced to zero, and simultaneously controlling the stored energy discharge power to be reduced until the power utilization power is equal to the generated power and the stored energy discharge power;
if the generated power-the stored energy charging power is less than the electricity utilization power and less than the electricity generation power, controlling the stored energy charging power to be reduced until the generated power-the stored energy charging power is equal to the electricity utilization power;
and if the power utilization power is less than the power generation power and the energy storage charging power, controlling the energy storage charging power to be increased until the power utilization power is equal to the power generation power and the energy storage charging power.
5. The method of claim 2, wherein prior to determining the grid supply mode, the method further comprises:
judging whether the power utilization power is greater than the power generation power, the power grid power and the energy storage discharge power;
and if so, controlling the power consumption to be reduced step by step until the power consumption is equal to the generated power, the power grid power and the energy storage and discharge function.
6. The method of claim 5, wherein controlling the power usage to be stepped down comprises:
controlling the power consumption to be reduced by one level according to a preset level;
judging whether the power utilization power is greater than the power generation power, the power grid power and the energy storage discharge power;
and if so, controlling the power consumption to reduce by one step again until the power consumption is equal to the generated power + the power grid power + the energy storage discharge power.
7. The method of claim 5, wherein prior to controlling the gradual reduction in power usage, the method further comprises:
judging whether the energy storage discharge power reaches the maximum value;
if yes, triggering and controlling the power consumption to be reduced step by step;
if not, controlling the energy storage discharge power to be increased to the maximum value;
judging whether the power utilization power is greater than the power generation power, the power grid power and the energy storage discharge power;
if yes, triggering and controlling the power consumption to be reduced step by step;
if not, if the power consumption power is equal to the generated power, the power grid power and the energy storage discharge power, stopping power supply power regulation; and if the power consumption power is less than the power generation power, the power grid power and the energy storage discharge power, triggering to determine a power supply mode of the power grid.
8. A power supply power adjustment apparatus for implementing the power supply power adjustment method according to any one of claims 1 to 7, the apparatus comprising:
the parameter acquisition module is used for acquiring the power consumption and power supply parameters of the power supply system; wherein the supply power parameters include: generating power, 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 a power grid; the power grid power supply mode comprises a constant power mode and a power limit 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.
9. A power supply system characterized by comprising the power supply power adjustment device of claim 8.
10. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out the method according to any one of claims 1 to 7.
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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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