Power System Energy Storage Configuration Method, Device and Terminal Equipment

Abstract

This application is applicable to the technical field of power systems, and provides a method, device and terminal equipment for configuring energy storage in a power system. The method includes: determining a daily net load curve according to the daily load curve and the daily output curve of a photovoltaic unit; judging whether energy storage needs to be configured according to the maximum and minimum output of a conventional synchronous unit and the daily net load curve, and if so, calculating a first discharge capacity and a first discharge power, and / or a first charge capacity and a first charge power according to the maximum and minimum output and the daily net load curve; calculating a ramp ratio according to the daily net load curve, and judging whether energy storage needs to be configured according to the ramp ratio, and if so, calculating a second discharge capacity and a second discharge power, and / or a second charge capacity and a second charge power according to the daily net load curve; configuring the energy storage capacity according to the discharge capacity and / or the charge capacity, and configuring the energy storage power according to the discharge power and / or the charge power. This application can accurately and effectively configure the energy storage capacity and energy storage power of an energy storage device.

Description

Technical Field

[0001] This application relates to the technical field of power systems, and particularly to a power system energy storage configuration method, device, and terminal device. Background Art

[0002] To actively respond to climate change and accelerate the construction of a clean, low-carbon, and secure energy system, the application of new energy power generation represented by photovoltaic power generation and wind power generation in the power system is increasing.

[0003] However, photovoltaic power generation has strong intermittency, volatility, and reverse peak shaving characteristics. The reduced photovoltaic output in the evening does not match the peak electricity consumption load, which may cause potential safety hazards due to the mismatch between power supply and load, and also increases the ramp-up pressure on traditional generating units. To address the above situation, the application of energy storage devices is particularly important.

[0004] Existing energy storage device configuration methods cannot accurately and effectively configure the energy storage capacity and energy storage power, lacking flexible adjustable energy storage capacity and energy storage power to handle emergencies and relieve the ramp-up pressure on traditional generating units. Summary of the Invention

[0005] In view of this, the embodiments of this application provide a power system energy storage configuration method, device, and terminal device to solve the technical problem that existing energy storage device configuration methods cannot accurately and effectively configure the energy storage capacity and energy storage power.

[0006] In a first aspect, the embodiments of this application provide a power system energy storage configuration method, including:

[0007] Obtain the daily load curve, the daily output curve of photovoltaic units, and the maximum and minimum output of conventional synchronous units, and determine the daily net load curve according to the daily load curve and the daily output curve of photovoltaic units;

[0008] Judge whether energy storage needs to be configured according to the maximum and minimum output of conventional synchronous units and the daily net load curve. If so, calculate the first discharge capacity and the first discharge power, and / or the first charge capacity and the first charge power according to the maximum and minimum output and the daily net load curve; calculate the ramp-up ratio according to the daily net load curve, and judge whether energy storage needs to be configured according to the ramp-up ratio. If so, calculate the second discharge capacity and the second discharge power, and / or the second charge capacity and the second charge power according to the daily net load curve;

[0009] Configure the energy storage capacity according to the discharge capacity and / or the charge capacity, and configure the energy storage power according to the discharge power and / or the charge power.

[0010] In a possible implementation manner of the first aspect, the maximum and minimum output of the conventional synchronous unit includes the maximum output and the minimum output;

[0011] Determine whether energy storage needs to be configured based on the maximum and minimum output of a conventional synchronous unit and the daily net load curve. If so, calculate the first discharge capacity and the first discharge power, and / or the first charge capacity and the first charge power according to the maximum and minimum output and the daily net load curve, including:

[0012] Determine whether the power corresponding to the first peak time of the daily net load curve is greater than the maximum output. If so, calculate the first discharge capacity and the first discharge power according to the maximum output and the power during the first peak period of the daily net load curve;

[0013] Determine whether the power corresponding to the maximum trough time of the daily net load curve is less than the minimum output. If so, calculate the first charge capacity and the first charge power according to the minimum output and the power during the maximum trough period of the daily net load curve.

[0014] In a possible implementation manner of the first aspect, the ramp ratio includes a downhill ratio and an uphill ratio;

[0015] Calculate the ramp ratio according to the daily net load curve, and determine whether energy storage needs to be configured based on the ramp ratio. If so, calculate the second discharge capacity and the second discharge power, and / or the second charge capacity and the second charge power according to the daily net load curve, including:

[0016] Determine the downhill period and the uphill period of the daily net load curve according to the first peak period, the maximum trough period, and the maximum peak period of the daily net load curve;

[0017] Calculate the downhill ratio according to the power during the downhill period of the daily net load curve, and calculate the uphill ratio according to the power during the uphill period of the daily net load curve;

[0018] Determine whether energy storage needs to be configured based on the downhill ratio and the uphill ratio. If so, calculate the second discharge capacity and the second discharge power, and / or the second charge capacity and the second charge power according to the daily net load curve.

[0019] In a possible implementation manner of the first aspect, determine whether energy storage needs to be configured based on the downhill ratio and the uphill ratio. If so, calculate the second discharge capacity and the second discharge power, and / or the second charge capacity and the second charge power according to the daily net load curve, including:

[0020] Determine whether the absolute value of the downhill ratio is greater than the ramp ratio constraint value. If so, calculate the second charge capacity and the second charge power according to the power during the downhill period of the daily net load curve;

[0021] Determine whether the absolute value of the uphill ratio is greater than the ramp ratio constraint value. If so, calculate the second discharge capacity and the second discharge power according to the power during the uphill period of the daily net load curve.

[0022] In a possible implementation manner of the first aspect, the method further includes:

[0023] If energy storage does not need to be configured, the corresponding discharge capacity and discharge power take zero values, and the corresponding charge capacity and charge power take zero values.

[0024] In a possible implementation manner of the first aspect, the method further includes:

[0025] Determine whether the power corresponding to the maximum peak moment of the daily net load curve is greater than the maximum output. If so, calculate the third discharge capacity and the third discharge power according to the maximum output and the power in the maximum peak period of the daily net load curve.

[0026] In a possible implementation manner of the first aspect, configuring the energy storage capacity according to the discharge capacity and / or the charge capacity, and configuring the energy storage power according to the discharge power and / or the charge power includes:

[0027] Configure the energy storage capacity according to the maximum value among the first discharge capacity, the first charge capacity, the second discharge capacity, the second charge capacity, and the third discharge capacity;

[0028] Configure the energy storage power according to the maximum value among the first discharge power, the first charge power, the second discharge power, the second charge power, and the third discharge power.

[0029] In the second aspect, an embodiment of the present application provides a power system energy storage configuration device, including:

[0030] An acquisition module, configured to acquire the daily load curve, the daily output curve of the photovoltaic unit, and the maximum and minimum outputs of the conventional synchronous unit, and determine the daily net load curve according to the daily load curve and the daily output curve of the photovoltaic unit;

[0031] A first calculation module, configured to determine whether energy storage needs to be configured according to the maximum and minimum outputs of the conventional synchronous unit and the daily net load curve. If so, calculate the first discharge capacity and the first discharge power, and / or the first charge capacity and the first charge power according to the maximum and minimum outputs and the daily net load curve;

[0032] A second calculation module, configured to calculate the ramp ratio according to the daily net load curve, determine whether energy storage needs to be configured according to the ramp ratio. If so, calculate the second discharge capacity and the second discharge power, and / or the second charge capacity and the second charge power according to the daily net load curve;

[0033] A configuration module, configured to configure the energy storage capacity according to the discharge capacity and / or the charge capacity, and configure the energy storage power according to the discharge power and / or the charge power.

[0034] In a third aspect, an embodiment of the present application provides a terminal device, including a memory and a processor. A computer program that can run on the processor is stored in the memory. When the processor executes the computer program, the power system energy storage configuration method described in any item of the first aspect is implemented.

[0035] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium. The computer-readable storage medium stores a computer program. When the computer program is executed by a processor, the power system energy storage configuration method described in any item of the first aspect is implemented.

[0036] In a fifth aspect, an embodiment of the present application provides a computer program product. When the computer program product runs on a terminal device, the terminal device is enabled to execute the power system energy storage configuration method described in any item of the first aspect above.

[0037] It can be understood that the beneficial effects of the above second aspect to fifth aspect can be referred to the relevant descriptions in the first aspect above, and will not be elaborated here.

[0038] The power system energy storage configuration method, device and terminal device provided by the embodiments of the present application determine the daily net load curve according to the daily load curve and the output curve of the photovoltaic unit, and calculate the first discharge capacity and the first discharge power, and / or the first charge capacity and the first charge power when energy storage needs to be configured according to the maximum and minimum output of the conventional synchronous unit and the daily net load curve. Calculate the ramp ratio according to the daily net load curve, and judge whether energy storage needs to be configured according to the ramp ratio. If so, calculate the second discharge capacity and the second discharge power, and / or the second charge capacity and the second charge power according to the daily net load curve. Finally, configure the energy storage capacity according to the calculated discharge capacity and / or charge capacity, and configure the energy storage power according to the discharge power and / or charge power, which can accurately and effectively configure the energy storage capacity and energy storage power of the energy storage device to better cope with emergencies and relieve the ramp pressure of traditional generating units.

[0039] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.

[0041] Figure 1It is a schematic flow chart of a power system energy storage configuration method provided by an embodiment of the present application;

[0042] Figure 2 It is a schematic diagram of the daily net load curve provided by an embodiment of the present application;

[0043] Figure 3 It is a schematic flow chart of a power system energy storage configuration method provided by an embodiment of the present application;

[0044] Figure 4 It is a schematic flow chart of a power system energy storage configuration method provided by an embodiment of the present application;

[0045] Figure 5 It is a schematic diagram of the daily net load curve and the ramp ratio curve of a typical day in March 2030;

[0046] Figure 6 It is a schematic diagram of the daily net load curve and the ramp ratio curve of a typical day in June 2030;

[0047] Figure 7 It is a schematic diagram of the daily net load curve and the ramp ratio curve of a typical day in September 2030;

[0048] Figure 8 It is a schematic diagram of the daily net load curve and the ramp ratio curve of a typical day in December 2030;

[0049] Figure 9 It is a schematic diagram of the maximum charge capacity and the maximum discharge capacity from March to December 2030;

[0050] Figure 10 It is a schematic diagram of the maximum charge power and the maximum discharge power from March to December 2030;

[0051] Figure 11 It is a schematic structural diagram of a power system energy storage configuration device provided by an embodiment of the present application;

[0052] Figure 12 It is a schematic structural diagram of a terminal device provided by an embodiment of the present application. Detailed implementation manners

[0053] The present application will be described more clearly below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the role of the present application, but do not limit the present application in any form. It should be noted that those of ordinary skill in the art can make several deformations and improvements without departing from the concept of the present application. These all belong to the protection scope of the present application.

[0054] It should be understood that when used in the specification and appended claims of this application, the term "comprising" indicates the presence of the described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their combinations.

[0055] It should also be understood that the term "and / or" used in the specification and appended claims of this application refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0056] In the description of the specification and appended claims of this application, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0057] The reference to "one embodiment" or "some embodiments" etc. described in the specification of this application means that a specific feature, structure or characteristic described in connection with that embodiment is included in one or more embodiments of this application. Thus, statements such as "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments" etc. that appear in different places in this specification do not necessarily all refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "comprising", "including", "having" and their variants all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0058] In addition, "a plurality of" mentioned in the embodiments of this application should be construed as two or more.

[0059] To actively respond to climate change and accelerate the construction of a clean, low-carbon and safe energy system, the application of new energy power generation represented by photovoltaic power generation and wind power generation in the power system is increasing day by day. According to data from the National Energy Administration, as of the end of 2021, the installed capacity of new energy power generation in China has reached 1.063 billion kilowatts, accounting for 44.8% of the total installed power capacity. Among them, the installed capacity of photovoltaic power generation is 306 million kilowatts, accounting for 12.9% of the total installed capacity in the country. However, in recent years, power grids with a high proportion of new energy power generation have frequently experienced major power outages after encountering emergencies, such as the rolling blackouts in California, USA in 2020 and the power outage in Texas, USA in 2021. The main reason for the above accidents is that the randomness and volatility of new energy power generation will bring new uncertainties to the source end of the power system, and the power system lacks flexible energy storage configurations to cope with emergencies.

[0060] Photovoltaic power generation has strong intermittency, volatility, and reverse peak shaving characteristics. The photovoltaic output power that drops at night does not match the peak load of electricity consumption, which may cause potential safety hazards resulting from the mismatch between power supply and load. At the same time, it also increases the ramp-up pressure on traditional generating units. To address the above situation, the application of energy storage devices is particularly important. The existing methods for configuring energy storage devices cannot accurately and effectively configure the energy storage capacity and energy storage power, lacking flexible adjustable energy storage capacity and energy storage power to handle emergencies and relieve the ramp-up pressure on traditional generating units.

[0061] Based on the above problems, the inventors have found through research that the energy storage capacity and energy storage power can be configured by comprehensively considering from two aspects: peak shaving and ramp-up ratio, so as to improve the accuracy of energy storage configuration.

[0062] That is to say, in the embodiment of the present application, the daily net load curve is determined according to the daily load curve and the daily output curve of the photovoltaic unit, and according to the maximum and minimum output of the conventional synchronous unit and the daily net load curve, when energy storage needs to be configured, the first discharge capacity and the first discharge power, and / or, the first charge capacity and the first charge power are calculated. The ramp-up ratio is calculated according to the daily net load curve, and it is judged whether energy storage needs to be configured according to the ramp-up ratio. If so, the second discharge capacity and the second discharge power, and / or, the second charge capacity and the second charge power are calculated according to the daily net load curve. Finally, the energy storage capacity is configured according to the calculated discharge capacity and / or charge capacity, and the energy storage power is configured according to the discharge power and / or charge power, which can accurately and effectively configure the energy storage capacity and energy storage power of the energy storage device to better handle emergencies and relieve the ramp-up pressure on traditional generators.

[0063] Figure 1 It is a schematic flowchart of a method for configuring energy storage in a power system provided by an embodiment of the present application. As Figure 1 shown, the method in the embodiment of the present application may include:

[0064] Step 101: Obtain the daily load curve, the daily output curve of the photovoltaic unit, and the maximum and minimum output of the conventional synchronous unit, and determine the daily net load curve according to the daily load curve and the daily output curve of the photovoltaic unit.

[0065] Specifically, the daily load curve is the daily load power curve, and the daily output curve of the photovoltaic unit is the daily power curve of the photovoltaic unit. The daily net load curve can be obtained by subtracting the daily photovoltaic unit curve from the daily load curve. The daily load curve and the daily output curve of the photovoltaic unit are data of a typical day, which can be historical data. For example, the daily load curve and the daily output curve of the photovoltaic unit of a typical day in 2020 are selected, and the daily net load curve of 2020 is determined according to the above historical daily load curve and historical daily output curve of the photovoltaic unit, and the configuration of the energy storage device in 2020 is determined according to the daily net load curve of 2020.

[0066] Optionally, the daily load curve and the daily output curve of the photovoltaic unit can also be prediction data. By predicting historical data, a predicted daily load curve and a predicted daily output curve of the photovoltaic unit are obtained, and the maximum and minimum output of the conventional synchronous unit is determined according to the predicted daily load curve. For example, the daily load curve and the daily output curve of the photovoltaic unit on a typical day in 2020 are selected, according to the "China Electricity Council Bulletin 2020", or, based on the time-series production simulation method, the predicted daily load curve and the predicted daily output curve of the photovoltaic unit in 2030 are predicted. Then, according to the above predicted daily load curve and the predicted daily output curve of the photovoltaic unit, the daily net load curve in 2030 is determined, and the configuration of the energy storage device in 2030 is determined according to the daily net load curve in 2030.

[0067] Figure 2 This is a schematic diagram of the daily net load curve provided by an embodiment of the present application. As Figure 2 shown, the abscissa of the daily net load curve is time, and the ordinate is the net load power, which is abbreviated as "power" in the following embodiments.

[0068] Exemplarily, the conventional synchronous unit is a traditional generator set, which can include a thermal power unit, a hydropower unit, or a nuclear power unit, etc. The maximum and minimum output of the conventional synchronous unit can be calculated according to the installed capacity of each unit.

[0069] Step 102: Determine whether energy storage needs to be configured according to the maximum and minimum output of the conventional synchronous unit and the daily net load curve. If so, calculate the first discharge capacity and the first discharge power, and / or, the first charge capacity and the first charge power according to the maximum and minimum output and the daily net load curve.

[0070] Optionally, the maximum and minimum output of the above conventional synchronous unit includes the maximum output and the minimum output.

[0071] In a possible implementation manner, referring to Figure 3 , in step 102, it may specifically include:

[0072] Step 1021: Determine whether the power corresponding to the first peak time of the daily net load curve is greater than the maximum output. If so, calculate the first discharge capacity and the first discharge power according to the maximum output and the power in the first peak period of the daily net load curve.

[0073] Optionally, the first peak of the daily net load curve is the first electricity consumption peak in a day, generally in the morning period of a day.

[0074] Exemplarily, referring to Figure 2 , determine whether the power P 1 corresponding to the first peak time t t1 of the daily net load curve is greater than the maximum output P M, if so, determine that this is the first case at this time. At this time, the energy storage device discharges, and energy storage needs to be configured. Determine the start and end times of the first peak period exceeding the maximum output power P M The start and end times of the first peak period are t 11 and t 12 , then the first peak period is t 11 -t 12 period. According to the maximum output power P M and the power of the first peak period, calculate the first discharge capacity E D1 and the first discharge power P D1 .

[0075] The formula for the first discharge capacity is:

[0076]

[0077] The formula for the first discharge power is:

[0078] P D1 = P t1 -P M

[0079] In the formula, P 1_load,t is the power corresponding to any moment t within the first peak period t 11 -t 12 period.

[0080] Optionally, if the power corresponding to the first peak moment t 1 of the daily net load curve t1 is not greater than the maximum output power P M , then determine that this is the second case at this time, and energy storage does not need to be configured at this time.

[0081] Exemplarily, if energy storage does not need to be configured, the corresponding discharge capacity and discharge power take zero values, and the corresponding charge capacity and charge power take zero values. Specifically, if the second case is satisfied and energy storage does not need to be configured at this time, the first discharge capacity E D1 takes a zero value, and the first discharge power P D1 takes a zero value.

[0082] Step 1022: Determine whether the power corresponding to the maximum trough moment of the daily net load curve is less than the minimum output power. If so, calculate the first charge capacity and the first charge power according to the minimum output power and the power of the maximum trough period of the daily net load curve.

[0083] Optionally, the maximum trough of the daily net load curve is the low electricity consumption period of the day, usually at noon.

[0084] Exemplarily, see Figure 2 , determine the maximum trough moment t 2The corresponding power P t2 Is it less than the minimum output P m If so, it is determined that this is the third case. At this time, the energy storage device is charged, energy storage needs to be configured, and it is determined that the start and end times of the maximum valley period lower than the minimum output P m are t 21 and t 22 Then the maximum valley period is t 21 -t 22 period. According to the minimum output P m and the power of the maximum valley period, calculate the first charging capacity E C1 and the first charging power P C1 .

[0085] The formula for the first charging capacity is:

[0086]

[0087] The formula for the first charging power is:

[0088] P C1 =P m -P t2

[0089] In the formula, P 2_load,t is the power corresponding to any moment t within the period t 21 -t 22 of the maximum valley period.

[0090] Optionally, if the power P 2 corresponding to the maximum valley moment t t2 of the daily net load curve is not less than the minimum output P m , it is determined that this is the fourth case. At this time, energy storage does not need to be configured, then the first charging capacity E C1 takes a zero value, and the first charging power P C1 takes a zero value.

[0091] In a possible implementation manner, it is determined whether the power corresponding to the maximum peak moment of the daily net load curve is greater than the maximum output. If so, the third discharge capacity and the third discharge power are calculated according to the maximum output and the power of the maximum peak period of the daily net load curve.

[0092] Optionally, the maximum peak of the daily net load curve is the maximum power consumption peak in a day, generally in the evening period of a day.

[0093] Exemplarily, refer to Figure 2 , determine whether the power P 0 corresponding to the maximum peak moment t t0 of the daily net load curve is greater than the maximum output P M, if so, the energy storage device discharges at this time, and energy storage needs to be configured, and it is necessary to determine the maximum output power P exceeding M The start and end times of the maximum peak period are t 01 and t 02 , then the maximum peak period is t 01 -t 02 period. According to the maximum output power P M and the power of the maximum peak period, calculate the third discharge capacity E D0 and the third discharge power P D0 .

[0094] The formula for the third discharge capacity is:

[0095]

[0096] The formula for the third discharge power is:

[0097] P D0 = P t0 - P M

[0098] In the formula, P 3_load,t is the power corresponding to any time t within the maximum peak period t 01 -t 02 period.

[0099] Optionally, if the power P 0 corresponding to the maximum peak time t t0 of the daily net load curve is not greater than the maximum output power P M , then the third discharge capacity E D0 takes a zero value, and the third discharge power P D0 takes a zero value.

[0100] Step 103: Calculate the ramp ratio according to the daily net load curve, and determine whether energy storage needs to be configured according to the ramp ratio. If so, calculate the second discharge capacity and the second discharge power, and / or the second charge capacity and the second charge power according to the daily net load curve.

[0101] Optionally, the above ramp ratio includes the downhill ratio and the uphill ratio.

[0102] In a possible implementation manner, refer to Figure 4 , in step 103, it may specifically include:

[0103] Step 1031: Determine the downhill period and the uphill period of the daily net load curve according to the first peak period, the maximum valley period and the maximum peak period of the daily net load curve.

[0104] Exemplarily, refer to Figure 2, determine the power corresponding to the first peak and the maximum trough. If the first case and the third case are both satisfied, determine that the downhill period of the daily net load curve is \(t\) 12 -\(t\) 21 period, and the uphill period is \(t\) 22 -\(t\) 01 period.

[0105] If the first case and the fourth case are both satisfied, determine that the downhill period of the daily net load curve is \(t\) 12 -\(t\) 2 period, and the uphill period is \(t\) 2 -\(t\) 01 period.

[0106] If the second case and the third case are both satisfied, determine that the downhill period of the daily net load curve is \(t\) 1 -\(t\) 21 period, and the uphill period is \(t\) 22 -\(t\) 01 period.

[0107] If the second case and the fourth case are both satisfied, determine that the downhill period of the daily net load curve is \(t\) 1 -\(t\) 2 period, and the uphill period is \(t\) 2 -\(t\) 01 period.

[0108] Step 1032: Calculate the downhill ratio according to the power in the downhill period of the daily net load curve, and calculate the uphill ratio according to the power in the uphill period of the daily net load curve.

[0109] Optionally, refer to Figure 2 , specifically, divide the downhill period of the daily net load curve into multiple periods with a duration of \(\Delta t\). For example, \(\Delta t\) can take a value of 5 minutes. For each \(\Delta t\) period, determine that the powers corresponding to the start and end times are \(P\) 0 and \(P\) 1 . Divide the uphill period of the daily net load curve into multiple periods with a duration of \(\Delta t\). For each \(\Delta t\) period, determine that the powers corresponding to the start and end times are \(P\) 2 and \(P\) 3 .

[0110] The formula for the downhill ratio is:

[0111] \(\lambda\) 下 \(=(P\) 1 - \(P\) 0 ) / \(P\) av

[0112] The formula for the uphill ratio is:

[0113] \(\lambda\) 上 \(=(P\)3 -P 2 ) / P av

[0114] Wherein, λ 下 is the downhill ratio, and λ 上 is the uphill ratio, P av is the daily average load, and P av =(P 峰 +P 谷 ) / 2, where P 峰 is the power corresponding to the maximum peak of the daily load curve, and P 谷 is the power corresponding to the maximum trough of the daily load curve.

[0115] Optionally, for each Δt period in the downhill period, determine the corresponding downhill ratio, and for each Δt period in the uphill period, determine the corresponding uphill ratio, to obtain a plurality of downhill ratios and uphill ratios, and further obtain the relationship curve between the downhill ratio and time, and the relationship curve between the uphill ratio and time.

[0116] Step 1033: Determine whether energy storage needs to be configured according to the downhill ratio and the uphill ratio. If so, calculate the second discharge capacity and the second discharge power, and / or the second charge capacity and the second charge power according to the daily net load curve.

[0117] In a possible implementation manner, in step 1033, it may specifically include:

[0118] Step S1: Determine whether the absolute value of the downhill ratio is greater than the climbing ratio constraint value. If so, calculate the second charge capacity and the second charge power according to the power in the downhill period of the daily net load curve.

[0119] Step S2: Determine whether the absolute value of the uphill ratio is greater than the climbing ratio constraint value. If so, calculate the second discharge capacity and the second discharge power according to the power in the uphill period of the daily net load curve.

[0120] Optionally, the climbing ratio constraint value takes the absolute value. For example, the climbing ratio constraint value can be |±5%|. Determine whether the absolute value of each downhill ratio is greater than the climbing ratio constraint value. If there is at least one downhill ratio whose absolute value is greater than the climbing ratio constraint value, energy storage needs to be configured. Determine the downhill ratio that satisfies the absolute value greater than the climbing ratio constraint value as the first downhill ratio, and determine the Δt period corresponding to the first downhill ratio as the first Δt period. There may be at least one first Δt period. Determine the start and end times of the i-th first Δt period as t 3,i and t 4,i , determine that the corresponding powers for the start and end times of t 3,i and t 4,i are P t3,i and P t4,iCalculate the second charging capacity E based on the power in the first Δt period C2 and the second charging power P C2 .

[0121] The formula for the second charging capacity is as follows:

[0122]

[0123] The formula for the second charging power is as follows:

[0124] P C2 = max{P t3,i - P t4,i}

[0125] i ∈ 1,…,n

[0126] In the formula, P 4_load,t,i is the power corresponding to any moment t within the i-th first Δt period t 3,i - t 4,i period, and P tN is the power corresponding to the rated climbing ratio. n is the number of the first Δt periods in the downhill period, that is, the number of Δt periods in the downhill period that satisfy the absolute value of the downhill ratio being greater than the climbing ratio constraint value is n.

[0127] Optionally, if the absolute value of each downhill ratio is not greater than the climbing ratio constraint value, then energy storage does not need to be configured at this time.

[0128] Exemplarily, if energy storage does not need to be configured, then the corresponding discharge capacity and discharge power take zero values, and the corresponding charging capacity and charging power take zero values. Specifically, if energy storage does not need to be configured, then the second charging capacity E C2 takes a zero value, and the second charging power P C2 takes a zero value.

[0129] Optionally, respectively determine whether the absolute value of each uphill ratio is greater than the climbing ratio constraint value. If there is at least one uphill ratio whose absolute value is greater than the climbing ratio constraint value, then energy storage needs to be configured. Determine the uphill ratio that satisfies the absolute value being greater than the climbing ratio constraint value as the first uphill ratio, and determine the Δt period corresponding to the first uphill ratio as the second Δt period. There can be at least one second Δt period. Determine the start and end times of the k-th second Δt period as t 5,k and t 6,k , and determine that the powers corresponding to the start and end times t 5,k and t 6,k are P t5,k and P t6,k . Calculate the second discharge capacity E D2 and the second discharge power P D2 .

[0130] The formula for the second discharge capacity is as follows:

[0131]

[0132] The formula for the second discharge power is as follows:

[0133] P D2 = max{P t5,k - P t6,k}

[0134] k ∈ 1, …, m

[0135] wherein, P 5_load,t,k is the power corresponding to any moment t within the k-th second Δt time period t 5,k - t 6,k time period. m is the number of second Δt time periods in the uphill time period, that is, the number of Δt time periods in the uphill time period that satisfy the absolute value of the uphill ratio being greater than the climbing ratio constraint value is m.

[0136] Optionally, if the absolute value of each uphill ratio is not greater than the climbing ratio constraint value, then energy storage does not need to be configured at this time. Then, the second discharge capacity E D2 takes a zero value, and the second discharge power P D2 takes a zero value.

[0137] Step 104: Configure the energy storage capacity according to the discharge capacity and / or the charge capacity, and configure the energy storage power according to the discharge power and / or the charge power.

[0138] In a possible implementation manner, in Step 104, it may specifically include:

[0139] Configure the energy storage capacity according to the maximum value among the first discharge capacity, the first charge capacity, the second discharge capacity, the second charge capacity, and the third discharge capacity. Configure the energy storage power according to the maximum value among the first discharge power, the first charge power, the second discharge power, the second charge power, and the third discharge power.

[0140] It should be noted that the above situation is the situation where all the judgment results for determining whether energy storage needs to be configured in the foregoing embodiments are yes. In this case, compare the values of the first discharge capacity, the first charge capacity, the second discharge capacity, the second charge capacity, and the third discharge capacity, and select the largest value as the energy storage capacity. Compare the values of the first discharge power, the first charge power, the second discharge power, the second charge power, and the third discharge power, and select the largest value as the energy storage power.

[0141] Of course, there is also a case where the judgment result of determining whether energy storage needs to be configured is negative. In this case, the maximum value among the discharge capacity and / or charge capacity is selected as the energy storage capacity, and the maximum value among the discharge power and / or charge power is selected as the energy storage power. If all judgment results are negative, the above-mentioned discharge capacity and / or charge capacity data and discharge power and / or charge power data are discarded, and the daily load curve and daily PV unit output curve of other typical days are retrieved to execute the specific steps of step 101 to step 104 until the energy storage capacity and energy storage power can be configured, that is, the energy storage configuration is completed.

[0142] Exemplarily, if the first discharge capacity and the first discharge power are calculated in step 102, and the second discharge capacity and the second discharge power are calculated in step 103, then in step 104, the energy storage capacity is configured according to the first discharge capacity and the second discharge capacity, and the energy storage power is configured according to the first discharge power and the second discharge power.

[0143] Optionally, if the first charge capacity and the first charge power are calculated in step 102, and the second discharge capacity and the second discharge power are calculated in step 103, then in step 104, the energy storage capacity is configured according to the first charge capacity and the second discharge capacity, and the energy storage power is configured according to the first charge power and the second discharge power.

[0144] Exemplarily, if the first discharge capacity and the first discharge power, and the first charge capacity and the first charge power are calculated in step 102, and the second charge capacity and the second charge power are calculated in step 103, then in step 104, the energy storage capacity is configured according to the first discharge capacity, the first charge capacity and the second charge capacity, and the energy storage power is configured according to the first discharge power, the first charge power and the second charge power.

[0145] Optionally, if the first charge capacity and the first charge power, and the third discharge capacity and the third discharge power are calculated in step 102, and the second discharge capacity and the second discharge power, and the second charge capacity and the second charge power are calculated in step 103, then in step 104, the energy storage capacity is configured according to the first charge capacity, the second discharge capacity, the second charge capacity and the third discharge capacity, and the energy storage power is configured according to the first charge power, the second discharge power, the second charge power and the third discharge power.

[0146] In a possible implementation manner, the daily load curves and daily PV unit output curves of multiple typical days can be selected, and the specific steps of step 101 to step 104 are respectively executed. The maximum value is selected from the multiple discharge capacities and / or charge capacities finally obtained as the energy storage capacity, and the maximum value is selected from the multiple discharge powers and / or charge powers obtained as the energy storage power to complete the energy storage configuration, which can further improve the accuracy of the energy storage configuration.

[0147] In a possible implementation, daily load curves and daily output curves of photovoltaic units for multiple typical days can be selected, and the specific steps of steps 101 to 104 are respectively executed to determine the maximum charge capacity and / or maximum discharge capacity, as well as the maximum charge power and / or maximum discharge power for each typical day. Then, the maximum value among multiple maximum charge capacities and / or maximum discharge capacities is selected as the energy storage capacity, and the maximum value among multiple maximum charge powers and / or maximum discharge powers is selected as the energy storage power, completing the energy storage configuration, which can further improve the accuracy of the energy storage configuration.

[0148] A method for configuring energy storage in a power system provided by an embodiment of the present application determines a daily net load curve according to the daily load curve and the daily output curve of the photovoltaic unit, and calculates the first discharge capacity and the first discharge power, and / or the first charge capacity and the first charge power according to the maximum output of the conventional synchronous unit and the daily net load curve in the case where energy storage needs to be configured. The climbing ratio is calculated according to the daily net load curve, and it is judged whether energy storage needs to be configured based on the climbing ratio. If so, the second discharge capacity and the second discharge power, and / or the second charge capacity and the second charge power are calculated according to the daily net load curve. Finally, the energy storage capacity is configured according to the calculated discharge capacity and / or charge capacity, and the energy storage power is configured according to the discharge power and / or charge power, which can accurately and effectively configure the energy storage capacity and energy storage power of the energy storage device to better cope with emergencies and relieve the climbing pressure of traditional generators.

[0149] It should be understood that the magnitudes of the sequence numbers of the steps in the above embodiments do not mean the order of execution. The execution order of each process should be determined according to its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0150] A simple example is to select a typical day in each of the four seasons of spring, summer, autumn, and winter in a certain area of the Hebei Southern Power Grid in 2020, that is, to select a typical day in March, June, September, and December respectively, obtain the daily load curve and the daily output curve of the photovoltaic unit for each typical day, and according to the above-mentioned daily output curve of the photovoltaic unit and the "China Electric Power Enterprise Federation 2020 Bulletin", predict the daily output curve of the photovoltaic unit for the four typical days in 2030. According to the above-mentioned daily load curve, predict the daily load curve for the four typical days in 2030 at a growth rate of 3%, and then obtain the daily net load curve for the four typical days based on the daily output curve and the daily load curve of the photovoltaic unit for the four typical days in 2030. The ramp ratio constraint value within 5 minutes of the traditional power plant is |±5%|. With the increase in the penetration rate of new energy power generation, the ramp ratio constraint value also changes accordingly. The ramp ratio constraint value in 2030 is set to |±2.25%|. Determine the maximum and minimum output of the conventional synchronous unit in 2030 according to the predicted daily load curve for the four typical days in 2030.

[0151] Execute the power system energy storage configuration method provided in the embodiment of the present application for the above data, that is, execute the specific steps of steps 101 to 104, and obtain the maximum charging capacity and the maximum discharging capacity, as well as the maximum charging power and the maximum discharging power for the typical days in March, June, September, and December respectively.

[0152] Figure 5 It is a schematic diagram of the daily net load curve and the ramp ratio curve for a typical day in March 2030. As Figure 5 shown, the maximum peak time for the typical day in March is 18:35, and the power corresponding to this time is 41.12 GW. The maximum trough time is 12:25, and the power corresponding to this time is 13.84 GW. The first peak period is 7:40 - 7:50. After calculation, the first discharging capacity during this period is 0.03 GWh, and the first discharging power is 0.25 GW. The maximum trough period is 12:10 - 12:35. The first charging capacity during this period is 0.09 GWh, and the first charging power is 0.5 GW. The maximum peak period is 17:20 - 22:55. The third discharging capacity during this period is 16.97 GWh, and the third discharging power is 5.28 GW. The downhill period is 7:50 - 12:10. The second charging capacity during this period is 0.06 GWh, and the second charging power is 3.11 GW. The uphill period is 12:35 - 17:20. The second discharging capacity during this period is 0.02 GWh, and the second discharging power is 1.15 GW. In summary, the maximum charging capacity for the typical day in March is 0.09 GWh, the maximum discharging capacity is 16.97 GWh, the maximum charging power is 3.11 GW, and the maximum discharging power is 5.28 GW.

[0153] Figure 6It is a schematic diagram of the daily net load curve and the ramping ratio curve for a typical day in June 2030. Figure 7 It is a schematic diagram of the daily net load curve and the ramping ratio curve for a typical day in September 2030. Figure 8 It is a schematic diagram of the daily net load curve and the ramping ratio curve for a typical day in December 2030.

[0154] Figure 9 It is a schematic diagram of the maximum charging capacity and the maximum discharging capacity from March to December 2030. Figure 10 It is a schematic diagram of the maximum charging power and the maximum discharging power from March to December 2030.

[0155] As Figure 9 shown, the maximum value among multiple maximum charging capacities and maximum discharging capacities is selected as the energy storage capacity, that is, 21.29 GWh is determined as the energy storage capacity in 2030. As Figure 10 shown, the maximum value among multiple maximum charging powers and maximum discharging powers is selected as the energy storage power, that is, 6.03 GW is determined as the energy storage power in 2030, and the energy storage configuration of the power system in 2030 is completed.

[0156] Figure 11 It is a schematic diagram of the structure of the power system energy storage configuration device provided by an embodiment of the present application. As Figure 11 shown, the power system energy storage configuration device provided by this embodiment may include: an acquisition module 201, a first calculation module 202, a second calculation module 203, and a configuration module 204.

[0157] Among them, the acquisition module 201 is used to acquire the daily load curve, the daily output curve of the photovoltaic unit, and the maximum and minimum output of the conventional synchronous unit, and determine the daily net load curve according to the daily load curve and the daily output curve of the photovoltaic unit;

[0158] The first calculation module 202 is used to judge whether energy storage needs to be configured according to the maximum and minimum output of the conventional synchronous unit and the daily net load curve. If so, calculate the first discharging capacity and the first discharging power, and / or, the first charging capacity and the first charging power according to the maximum and minimum output and the daily net load curve;

[0159] The second calculation module 203 is used to calculate the ramping ratio according to the daily net load curve, judge whether energy storage needs to be configured according to the ramping ratio. If so, calculate the second discharging capacity and the second discharging power, and / or, the second charging capacity and the second charging power according to the daily net load curve;

[0160] The configuration module 204 is used to configure the energy storage capacity according to the discharging capacity and / or the charging capacity, and configure the energy storage power according to the discharging power and / or the charging power.

[0161] Optionally, the maximum and minimum output powers of a conventional synchronous unit include the maximum output power and the minimum output power. The first calculation module 202 is specifically configured to: determine whether the power corresponding to the first peak moment of the daily net load curve is greater than the maximum output power. If so, calculate the first discharge capacity and the first discharge power according to the maximum output power and the power of the first peak period of the daily net load curve; determine whether the power corresponding to the maximum trough moment of the daily net load curve is less than the minimum output power. If so, calculate the first charge capacity and the first charge power according to the minimum output power and the power of the maximum trough period of the daily net load curve.

[0162] Optionally, the second calculation module 203 is specifically configured to: determine the downhill period and the uphill period of the daily net load curve according to the first peak period, the maximum trough period, and the maximum peak period of the daily net load curve; calculate the downhill ratio according to the power of the downhill period of the daily net load curve, and calculate the uphill ratio according to the power of the uphill period of the daily net load curve; determine whether energy storage needs to be configured according to the downhill ratio and the uphill ratio. If so, calculate the second discharge capacity and the second discharge power, and / or the second charge capacity and the second charge power according to the daily net load curve.

[0163] Optionally, the second calculation module 203 is further specifically configured to: determine whether the absolute value of the downhill ratio is greater than the climbing ratio constraint value. If so, calculate the second charge capacity and the second charge power according to the power of the downhill period of the daily net load curve; determine whether the absolute value of the uphill ratio is greater than the climbing ratio constraint value. If so, calculate the second discharge capacity and the second discharge power according to the power of the uphill period of the daily net load curve.

[0164] Optionally, the first calculation module 202 is further specifically configured to: if energy storage does not need to be configured, set the corresponding discharge capacity and discharge power to zero values, and set the corresponding charge capacity and charge power to zero values.

[0165] Optionally, the first calculation module 202 is further specifically configured to: determine whether the power corresponding to the maximum peak moment of the daily net load curve is greater than the maximum output power. If so, calculate the third discharge capacity and the third discharge power according to the maximum output power and the power of the maximum peak period of the daily net load curve.

[0166] Optionally, the configuration module 204 is specifically configured to: configure the energy storage capacity according to the maximum value among the first discharge capacity, the first charge capacity, the second discharge capacity, the second charge capacity, and the third discharge capacity; configure the energy storage power according to the maximum value among the first discharge power, the first charge power, the second discharge power, the second charge power, and the third discharge power.

[0167] It should be noted that, regarding the information interaction, execution process, etc. among the above-mentioned devices / units, since they are based on the same concept as the method embodiment of the present application, for their specific functions and the technical effects brought, reference can be specifically made to the method embodiment part, and details are not described herein again.

[0168] Figure 12 is a schematic structural diagram of a terminal device provided by an embodiment of the present application. As Figure 12 shown, the terminal device 300 of this embodiment includes: a processor 310 and a memory 320. A computer program 321 that can run on the processor 310 is stored in the memory 320. When the processor 310 executes the computer program 321, the steps in any of the above method embodiments are implemented, such as Figure 1 the steps 101 to 104 shown. Alternatively, when the processor 310 executes the computer program 321, the functions of each module / unit in the above device embodiments are implemented, such as Figure 11 the functions of the modules 201 to 204 shown.

[0169] Exemplarily, the computer program 321 can be divided into one or more modules / units. One or more modules / units are stored in the memory 320 and executed by the processor 310 to complete the present application. The one or more modules / units can be a series of computer program instruction segments capable of performing specific functions, and these instruction segments are used to describe the execution process of the computer program 321 in the terminal device 300.

[0170] Those skilled in the art can understand that Figure 12 this is only an example of the terminal device and does not constitute a limitation on the terminal device. It may include more or fewer components than shown in the figure, or combine some components, or different components, such as input / output devices, network access devices, buses, etc.

[0171] The processor 310 can be a central processing unit (CPU), or can also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or this processor can also be any conventional processor, etc.

[0172] The memory 320 can be an internal storage unit of the terminal device, such as the hard disk or memory of the terminal device, or an external storage device of the terminal device, such as a plug-in hard disk equipped on the terminal device, a SmartMedia Card (SMC), a Secure Digital (SD) card, a Flash Card, etc. The above-mentioned memory 320 can also include both the internal storage unit and the external storage device of the terminal device. The above-mentioned memory 320 is used to store computer programs and other programs and data required by the terminal device. The memory 320 can also be used to temporarily store the data that has been output or will be output.

[0173] Those skilled in the art can clearly understand that, for the convenience and conciseness of description, only the above-mentioned division of each functional unit and module is used as an example. In actual applications, the above-mentioned functions can be allocated to different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated into a processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit. In addition, the specific names of each functional unit and module are only for the convenience of mutual distinction and do not limit the protection scope of the present application. The specific working process of the units and modules in the above system can refer to the corresponding process in the foregoing method embodiment and will not be elaborated herein.

[0174] In the above embodiments, the descriptions of the various embodiments have their own emphases. For the parts not detailed or recorded in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0175] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or by the combination of computer software and electronic hardware. Whether these functions are executed in hardware or software depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0176] In the embodiments provided by the present invention, it should be understood that the disclosed device / terminal device and method can be implemented in other ways. For example, the device / terminal device embodiments described above are merely illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections between each other can be through some interfaces. The indirect couplings or communication connections of the devices or units can be in electrical, mechanical or other forms.

[0177] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0178] In addition, in each embodiment of the present invention, the functional units can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

[0179] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, to implement all or part of the processes in the above method embodiments of the present invention, it can also be completed by a computer program instructing the relevant hardware. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of the above-mentioned method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in the form of source code, object code, executable file or some intermediate form, etc. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electrical carrier signal, telecommunication signal, and software distribution medium, etc.

[0180] The above-described embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A method for configuring energy storage in a power system, characterized in that, it includes: Obtain the daily load curve, the daily output curve of the photovoltaic unit, and the maximum and minimum output of the conventional synchronous unit, and determine the daily net load curve according to the daily load curve and the daily output curve of the photovoltaic unit; Judge whether energy storage needs to be configured according to the maximum and minimum output of the conventional synchronous unit and the daily net load curve. If so, calculate the first discharge capacity and the first discharge power, and / or the first charge capacity and the first charge power according to the maximum and minimum output and the daily net load curve; Calculate the ramp ratio according to the daily net load curve, and judge whether energy storage needs to be configured according to the ramp ratio. If so, calculate the second discharge capacity and the second discharge power, and / or the second charge capacity and the second charge power according to the daily net load curve; Configure the energy storage capacity according to the discharge capacity and / or the charge capacity, and configure the energy storage power according to the discharge power and / or the charge power; Wherein, the maximum and minimum output of the conventional synchronous unit includes the maximum output and the minimum output; the method further includes: Judge whether the power corresponding to the maximum peak moment of the daily net load curve is greater than the maximum output. If so, calculate the third discharge capacity and the third discharge power according to the maximum output and the power in the maximum peak period of the daily net load curve; The configuring the energy storage capacity according to the discharge capacity and / or the charge capacity, and configuring the energy storage power according to the discharge power and / or the charge power includes: Configure the energy storage capacity according to the maximum value among the first discharge capacity, the first charge capacity, the second discharge capacity, the second charge capacity and the third discharge capacity; Configure the energy storage power according to the maximum value among the first discharge power, the first charge power, the second discharge power, the second charge power and the third discharge power.

2. The method for configuring energy storage in a power system according to claim 1, characterized in that, the judging whether energy storage needs to be configured according to the maximum and minimum output of the conventional synchronous unit and the daily net load curve. If so, calculating the first discharge capacity and the first discharge power, and / or the first charge capacity and the first charge power according to the maximum and minimum output and the daily net load curve includes: Judge whether the power corresponding to the first peak moment of the daily net load curve is greater than the maximum output. If so, calculate the first discharge capacity and the first discharge power according to the maximum output and the power in the first peak period of the daily net load curve; Judge whether the power corresponding to the maximum trough moment of the daily net load curve is less than the minimum output. If so, calculate the first charge capacity and the first charge power according to the minimum output and the power in the maximum trough period of the daily net load curve.

3. The method for configuring energy storage in a power system according to claim 2, characterized in that, the ramp ratio includes the downhill ratio and the uphill ratio; the calculating the ramp ratio according to the daily net load curve, and judging whether energy storage needs to be configured according to the ramp ratio. If so, calculating the second discharge capacity and the second discharge power, and / or the second charge capacity and the second charge power according to the daily net load curve includes: Determine the downhill period and uphill period of the daily net load curve according to the first peak period, the maximum trough period and the maximum peak period of the daily net load curve; Calculate the downhill ratio according to the power during the downhill period of the daily net load curve, and calculate the uphill ratio according to the power during the uphill period of the daily net load curve; Judge whether energy storage needs to be configured according to the downhill ratio and the uphill ratio. If so, calculate the second discharge capacity and the second discharge power, and / or the second charge capacity and the second charge power according to the daily net load curve.

4. The method for configuring energy storage in a power system according to claim 3, wherein, The step of judging whether energy storage needs to be configured according to the downhill ratio and the uphill ratio. If so, calculating the second discharge capacity and the second discharge power, and / or the second charge capacity and the second charge power according to the daily net load curve includes: Judge whether the absolute value of the downhill ratio is greater than the climbing ratio constraint value. If so, calculate the second charge capacity and the second charge power according to the power during the downhill period of the daily net load curve; Judge whether the absolute value of the uphill ratio is greater than the climbing ratio constraint value. If so, calculate the second discharge capacity and the second discharge power according to the power during the uphill period of the daily net load curve.

5. The method for configuring energy storage in a power system according to any one of claims 1-4, wherein, The method further includes: If energy storage does not need to be configured, the corresponding discharge capacity and discharge power are set to zero values, and the corresponding charge capacity and charge power are set to zero values.

6. An energy storage configuration device for a power system, wherein, comprising: An acquisition module, configured to acquire the daily load curve, the daily photovoltaic unit output curve and the maximum and minimum outputs of the conventional synchronous unit, and determine the daily net load curve according to the daily load curve and the daily photovoltaic unit output curve; A first calculation module, configured to judge whether energy storage needs to be configured according to the maximum and minimum outputs of the conventional synchronous unit and the daily net load curve. If so, calculate the first discharge capacity and the first discharge power, and / or the first charge capacity and the first charge power according to the maximum and minimum outputs and the daily net load curve; A second calculation module, configured to calculate the climbing ratio according to the daily net load curve, judge whether energy storage needs to be configured according to the climbing ratio. If so, calculate the second discharge capacity and the second discharge power, and / or the second charge capacity and the second charge power according to the daily net load curve; A configuration module, configured to configure the energy storage capacity according to the discharge capacity and / or the charge capacity, and configure the energy storage power according to the discharge power and / or the charge power; wherein, the maximum and minimum outputs of the conventional synchronous unit include the maximum output and the minimum output; the first calculation module is further configured to judge whether the power corresponding to the maximum peak moment of the daily net load curve is greater than the maximum output. If so, calculate the third discharge capacity and the third discharge power according to the maximum output and the power during the maximum peak period of the daily net load curve; The configuration module is further configured to configure the energy storage capacity according to the maximum value among the first discharge capacity, the first charge capacity, the second discharge capacity, the second charge capacity, and the third discharge capacity; and configure the energy storage power according to the maximum value among the first discharge power, the first charge power, the second discharge power, the second charge power, and the third discharge power.

7. A terminal device, comprising a memory and a processor, where a computer program that can run on the processor is stored in the memory, wherein, when the processor executes the computer program, the power system energy storage configuration method according to any one of claims 1 to 5 is implemented.

8. A computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, wherein, when the computer program is executed by a processor, the power system energy storage configuration method according to any one of claims 1 to 5 is implemented.

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