A constant volume method and device based on source network load storage integration

Abstract

This invention discloses a capacity determination method and apparatus based on integrated generation, grid, load, and energy storage. The method includes: setting a preset scale value and a preset time value; obtaining the unit power cost value of photovoltaic power, the unit power cost value of wind power, and the unit capacity cost value of energy storage; repeatedly executing simulation calculations until the current simulation scale value is the same as the preset scale value; calculating the target renewable energy utilization rate, the target renewable energy absorption rate, and the target investment cost value during the repeated execution of simulation calculations, and calculating the target capacity corresponding to each simulation scale value based on the target renewable energy utilization rate, the target renewable energy absorption rate, and the target investment cost value. This invention can calculate the target energy storage investment cost value and the target energy storage capacity value corresponding to different scale values. Ultimately, by refining the capacity determination of energy storage scale, a more reasonable scale for wind power and photovoltaic power can be determined, thereby improving the utilization rate of energy storage.

Description

Technical Field

[0001] This invention relates to the field of new energy technology, and in particular to a capacity-limiting method and apparatus based on the integration of power generation, grid, load and storage. Background Technology

[0002] The integrated power generation, grid, load, and energy storage model is an operational model that provides a holistic solution for power sources, grids, loads, and energy storage. It is also an important business model under the new power system, and is of great significance to the new power system dominated by new energy sources. This integrated model not only effectively solves problems related to clean energy consumption and the resulting grid fluctuations, but also improves the utilization rate of renewable energy for users through its integrated approach.

[0003] To meet the requirements for renewable energy utilization, it is necessary to increase the installed capacity of renewable energy sources such as wind power and solar power in the energy supply. However, the installed capacity of wind power and solar power is not necessarily better the larger it is, because their volatility, intermittency and randomness not only pose challenges to the safe and stable operation of the power grid, but also often lead to a decrease in the absorption rate while increasing the installed capacity, resulting in higher investment costs for energy storage and low utilization rates of renewable energy storage.

[0004] Existing technologies for wind and solar power installations are limited by calculating only a small amount of solar and wind power output data. They do not calculate the output data of multiple solar and wind power plants, nor do they perform detailed calculations for different wind and solar power installation scales. This makes it impossible to accurately determine the scale of energy storage, resulting in low energy storage utilization. Summary of the Invention

[0005] The embodiments of the present invention provide an effective solution to the problem in the prior art that the scale of energy storage cannot be precisely determined, resulting in low utilization of energy storage.

[0006] One embodiment of the present invention provides a capacity determination method based on integrated source-grid-load-storage system, comprising:

[0007] Set the preset scale value and preset time value;

[0008] Obtain the unit power cost value of photovoltaic power, the unit power cost value of wind power, and the unit capacity cost value of energy storage;

[0009] Repeat the following simulation calculation operation until the current simulation scale value is the same as the preset scale value:

[0010] Get the current simulation scale value;

[0011] When the current simulation scale value is less than or equal to the preset scale value, the simulated user load demand, simulated photovoltaic power generation, simulated wind power generation, battery state of charge value and battery rated power value are obtained for each simulation time during the time period from the simulation time value to the preset time value. Based on the simulated user load demand, simulated photovoltaic power generation, simulated wind power generation, battery state of charge value and battery rated power value for each simulation time, the battery utilization, simulated user load demand, total utilization, simulated photovoltaic power generation and simulated wind power generation value for each simulation time are calculated.

[0012] The target renewable energy utilization rate corresponding to the current simulation scale value is calculated based on the battery utilization and simulated user load demand at each simulation time. The target renewable energy absorption rate corresponding to the current simulation scale value is calculated based on the total utilization, simulated photovoltaic power generation and simulated wind power generation at each simulation time.

[0013] The target investment cost value corresponding to the current simulation scale value is calculated based on the current simulation scale value, the photovoltaic unit power cost value, the wind power unit power cost value, and the energy storage unit capacity cost value.

[0014] The target capacity corresponding to the current simulation scale value is calculated based on the target renewable energy utilization rate, the target renewable energy absorption rate, and the target investment cost value.

[0015] The current simulation scale value is added to the preset scale value increment to obtain the updated scale value, and the updated scale value is used as the simulation scale value for the next simulation calculation operation.

[0016] Preferably, the process of obtaining the simulated user load demand, simulated photovoltaic power generation, simulated wind power generation, battery state of charge (SBC) value, and battery rated power value corresponding to each simulation time within the time period from the simulation time value to the preset time value, and calculating the battery utilization, simulated user load demand, total utilization, simulated photovoltaic power generation, and simulated wind power generation corresponding to each simulation time based on the simulated user load demand, simulated photovoltaic power generation, simulated wind power generation, battery SBC value, and battery rated power value at each time, specifically includes:

[0017] Repeat the following time-time data calculation operations until the simulated time value matches the preset time value; the time-time data calculation operations include:

[0018] Obtain a simulation time value;

[0019] When the simulation time value is less than or equal to the preset time value, the simulated user load demand, simulated photovoltaic power generation, simulated wind power generation, battery state of charge value and battery rated power value corresponding to the simulation time value are obtained.

[0020] When the simulated photovoltaic power generation is greater than or equal to the simulated user load demand, the simulated user load demand is used as the simulated photovoltaic utilization, and the simulated photovoltaic curtailment is calculated based on the simulated photovoltaic power generation and the simulated user load demand. At the same time, the simulated wind power utilization is set to 0, and the simulated wind power generation is used as the simulated wind power curtailment. When the simulated photovoltaic power generation is less than the simulated user load demand, the simulated photovoltaic utilization, photovoltaic curtailment, simulated wind power utilization, and simulated wind power curtailment are obtained based on the simulated photovoltaic power generation and the simulated wind power generation.

[0021] The total utilization corresponding to the simulation time value is obtained by adding the simulated photovoltaic utilization and the simulated wind power utilization, and the first total abandonment corresponding to the simulation time value is obtained by adding the simulated photovoltaic abandonment and the simulated wind power abandonment.

[0022] Determine whether the first total abandonment amount corresponding to the simulation time value is greater than 0. If the total abandonment amount corresponding to the simulation time value is greater than 0, then obtain the battery utilization amount and the second total abandonment amount corresponding to the simulation time value based on the battery state of charge value and the battery rated power. If the total abandonment amount corresponding to the simulation time value is less than or equal to 0, then obtain the battery utilization amount and the second total abandonment amount corresponding to the simulation time value based on the battery state of charge value, the battery rated power, the simulated user load demand, and the total utilization amount.

[0023] The updated time value is obtained by adding the preset time value increment to the simulated time value, and the updated time value is used as the simulated time value for the next operation of calculating the data at each time point.

[0024] Preferably, when the simulated photovoltaic power generation is less than the simulated user load demand, the simulated photovoltaic utilization, photovoltaic curtailment, simulated wind power utilization, and simulated wind power curtailment are obtained based on the simulated photovoltaic power generation and simulated wind power generation, specifically including:

[0025] When the simulated photovoltaic power generation is less than the simulated user load demand, the simulated photovoltaic power generation is taken as the simulated photovoltaic utilization, and the photovoltaic curtailment is set to 0.

[0026] The system determines whether the simulated wind power generation is greater than or equal to the simulated user load demand minus the simulated photovoltaic utilization. If the simulated wind power generation is greater than or equal to the simulated user load demand minus the simulated photovoltaic utilization, then the simulated wind power utilization is taken as the simulated wind power utilization, and the simulated wind power curtailment is taken as the simulated wind power curtailment. If the simulated wind power generation is less than the simulated user load demand minus the simulated photovoltaic utilization, then the simulated wind power generation is taken as the simulated wind power utilization, and the simulated wind power curtailment is set to 0.

[0027] Preferably, when the first total abandonment amount corresponding to the simulation time value is greater than 0, the battery utilization amount corresponding to the simulation time value and the second total abandonment amount corresponding to the simulation time value are obtained based on the battery state-of-charge value and the battery rated power, specifically including:

[0028] When the first total discard amount corresponding to the simulation time value is greater than 0, it is determined whether the battery state of charge value is less than or equal to the preset maximum battery state value. When the battery state of charge value is less than or equal to the preset maximum battery state value, it is determined whether the first total discard amount is less than or equal to the battery rated power. When the first total discard amount is less than or equal to the battery rated power, the battery rated power is taken as the second total discard amount, and the battery utilization corresponding to the simulation time value is set to 0. When the first total discard amount is greater than the battery rated power, the result of adding the battery rated power and the first total discard amount is taken as the second total discard amount, and the battery utilization corresponding to the simulation time value is set to 0. When the battery state of charge value is greater than the preset maximum battery state value, the first total discard amount is taken as the second total discard amount, and the battery utilization corresponding to the simulation time value is set to 0.

[0029] Preferably, when the total abandonment amount corresponding to the simulation time value is less than or equal to 0, the battery utilization amount corresponding to the simulation time value and the second total abandonment amount corresponding to the simulation time value are obtained based on the battery state of charge value, battery rated power, simulated user load demand, and total utilization amount, specifically including:

[0030] When the total abandoned amount corresponding to the simulation time value is less than or equal to 0, it is determined whether the battery state of charge value is greater than or equal to the preset minimum battery state value. When the battery state of charge value is greater than or equal to the preset minimum battery state value, it is determined whether the battery rated power is greater than or equal to the result of the simulated user load demand minus the total utilization. When the battery rated power is greater than or equal to the result of the simulated user load demand minus the total utilization, the battery utilization corresponding to the simulation time value is set to 0, and the first total abandoned amount is used as the second total abandoned amount. When the battery rated power is less than the result of the simulated user load demand minus the total utilization, the result of the simulated user load demand minus the sum of the total utilization and the battery rated power is used as the battery utilization corresponding to the simulation time value, and the first total abandoned amount is used as the second total abandoned amount. When the battery state of charge value is less than the preset minimum battery state value, the result of the simulated user load demand minus the total utilization is used as the battery utilization corresponding to the simulation time value, and the first total abandoned amount is used as the second total abandoned amount.

[0031] Preferably, the step of calculating the target renewable energy utilization rate corresponding to the current simulation scale value based on the battery utilization and simulated user load demand at each simulation time specifically includes:

[0032] The total battery utilization is obtained by adding up the battery utilization at each simulation time.

[0033] The total user load demand is obtained by adding up the simulated user load demand at each simulation time.

[0034] The target renewable energy utilization rate is calculated according to the first formula; wherein, the first formula is:

[0035]

[0036] Where A1 is the target renewable energy utilization rate, P g P represents the total battery utilization. L This represents the total user load demand.

[0037] Preferably, the step of calculating the target renewable energy absorption rate corresponding to the current simulation scale value based on the total utilization, simulated photovoltaic power generation, and simulated wind power generation at each simulation time specifically includes:

[0038] The total utilization at each simulation moment is added together to obtain the total utilization of wind power and photovoltaic power.

[0039] The total photovoltaic power generation is obtained by adding up the simulated photovoltaic power generation at each simulation time.

[0040] The total wind power generation is obtained by adding up the simulated wind power generation at each simulation time.

[0041] The target renewable energy integration rate is calculated using the second formula; whereby the second formula is:

[0042]

[0043] Where A2 is the target renewable energy integration rate, P u P represents the total utilization of wind and solar power. s For total photovoltaic power generation, P w This represents the total wind power generation.

[0044] Preferably, the step of calculating the target investment cost value corresponding to the current simulation scale value based on the current simulation scale value, the photovoltaic unit power cost value, the wind power unit power cost value, and the energy storage unit capacity cost value specifically includes:

[0045] The current photovoltaic weight coefficient is obtained by multiplying the current simulation scale value by the preset photovoltaic weight coefficient and adding the result to the simulation photovoltaic weight coefficient from the previous simulation calculation.

[0046] The current wind power weight coefficient is obtained by multiplying the current simulation scale value by the preset wind power weight coefficient and adding the result to the simulation wind power weight coefficient from the previous simulation calculation.

[0047] The current energy storage weight coefficient is obtained by multiplying the current simulation scale value by the preset energy storage weight coefficient and adding the result to the simulation energy storage weight coefficient from the previous simulation calculation.

[0048] The target investment cost is calculated according to the third formula; wherein, the third formula is:

[0049] C = C s ·S+C w W+C b ·E B ;

[0050] Where C is the target investment cost value, C s Where S is the unit power cost of photovoltaics, and C is the current photovoltaic weighting coefficient. w Where W is the unit power cost of wind power, and C is the current wind power weighting coefficient. b E represents the unit capacity cost of energy storage. B This represents the current energy storage weighting coefficient.

[0051] Preferably, the step of calculating the target capacity corresponding to the current simulation scale value based on the target renewable energy utilization rate, the target renewable energy absorption rate, and the target investment cost value specifically includes:

[0052] Obtain the first capacity weight coefficient, the second capacity weight coefficient, and the third capacity weight coefficient;

[0053] Obtain the target investment cost value obtained each time the simulation calculation is performed, and take the target investment cost value with the largest value among the target investment cost values ​​obtained from each simulation calculation as the current maximum target investment cost;

[0054] The target capacity corresponding to the current simulation scale value is calculated according to the fourth formula; wherein, the fourth formula is:

[0055] G = X1·A1 + X2·A2 - X3·C / C max ;

[0056] Where G is the target capacity, X1 is the first capacity weighting coefficient, X2 is the second capacity weighting coefficient, X3 is the third capacity weighting coefficient, A1 is the target renewable energy utilization rate, A2 is the target renewable energy absorption rate, C is the target investment cost value, and C max This represents the maximum target investment cost.

[0057] Based on the above method embodiments, the present invention provides corresponding apparatus embodiments.

[0058] A capacity-determining device based on integrated source-grid-load-storage system includes: a preset value setting module, a data acquisition module, and a module for repeatedly performing simulation calculations.

[0059] The preset value setting module is used to set preset scale values ​​and preset time values;

[0060] The data acquisition module is used to acquire the unit power cost value of photovoltaic power, the unit power cost value of wind power, and the unit capacity cost value of energy storage.

[0061] The repeated simulation calculation operation module is used to repeatedly execute the following simulation calculation operation until the current simulation scale value is the same as the preset scale value:

[0062] Get the current simulation scale value;

[0063] When the current simulation scale value is less than or equal to the preset scale value, the simulated user load demand, simulated photovoltaic power generation, simulated wind power generation, battery state of charge value and battery rated power value are obtained for each simulation time during the time period from the simulation time value to the preset time value. Based on the simulated user load demand, simulated photovoltaic power generation, simulated wind power generation, battery state of charge value and battery rated power value for each simulation time, the battery utilization, simulated user load demand, total utilization, simulated photovoltaic power generation and simulated wind power generation value for each simulation time are calculated.

[0064] The target renewable energy utilization rate corresponding to the current simulation scale value is calculated based on the battery utilization and simulated user load demand at each simulation time. The target renewable energy absorption rate corresponding to the current simulation scale value is calculated based on the total utilization, simulated photovoltaic power generation and simulated wind power generation at each simulation time.

[0065] The target investment cost value corresponding to the current simulation scale value is calculated based on the current simulation scale value, the photovoltaic unit power cost value, the wind power unit power cost value, and the energy storage unit capacity cost value.

[0066] The target capacity corresponding to the current simulation scale value is calculated based on the target renewable energy utilization rate, the target renewable energy absorption rate, and the target investment cost value.

[0067] The updated simulation scale value is obtained by adding a preset scale value increment to the current simulation scale value, and this updated scale value is used as the simulation scale value for the next simulation calculation operation.

[0068] The following benefits can be obtained by implementing the present invention:

[0069] This invention provides a capacity determination method based on integrated generation, grid, load, and storage. This method involves repeatedly performing simulation calculations after setting preset scale values ​​and preset time values, and obtaining the unit power cost of photovoltaic power, the unit power cost of wind power, and the unit capacity cost of energy storage, until the current simulation scale value matches the preset scale value. During the simulation calculations, the method can calculate the simulated user load demand, simulated photovoltaic power generation, simulated wind power generation, battery state of charge, and battery rated power at different scale values ​​and at different times. This allows for the calculation of the target renewable energy utilization rate and target renewable energy absorption rate corresponding to different scale values. Furthermore, based on the scale value, the unit power cost of photovoltaic power, the unit power cost of wind power, and the unit capacity cost of energy storage, the method calculates the target investment cost value corresponding to different scale values, thus enabling the final calculation of different target capacities corresponding to different simulation scale values.

[0070] Compared with existing technologies, this invention calculates the renewable energy utilization rate and renewable energy absorption rate by considering the output characteristics of photovoltaic (i.e., renewable energy) power generation, wind power power generation, and user load characteristics at different scale values ​​and at different times. It can then calculate the investment cost value and capacity value of the target energy storage corresponding to different scale values. Finally, by refining the capacity determination of the energy storage scale, a more reasonable scale of wind power and photovoltaic power can be determined, thereby improving the utilization rate of energy storage. Attached Figure Description

[0071] Figure 1 This is a schematic flowchart of a capacity stabilization method based on the integration of source, grid, load and storage provided in an embodiment of the present invention.

[0072] Figure 2 This is a schematic diagram of the data calculation process at various times for a capacity determination method based on the integration of source, grid, load and storage provided in an embodiment of the present invention.

[0073] Figure 3 This is a schematic flowchart of a simulation calculation method based on the integrated source-grid-load-storage system provided in an embodiment of the present invention.

[0074] Figure 4 This is a schematic diagram of the structure of a fixed-capacity device based on the integration of source, grid, load and storage provided in an embodiment of the present invention. Detailed Implementation

[0075] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0076] like Figure 1 The diagram shown is a flowchart illustrating a capacity stabilization method based on integrated source-grid-load-storage system according to an embodiment of the present invention.

[0077] An embodiment of the present invention provides a method comprising:

[0078] Step S1: Set the preset scale value and preset time value;

[0079] Step S2: Obtain the unit power cost of photovoltaic power, the unit power cost of wind power, and the unit capacity cost of energy storage;

[0080] Step S3: Repeat the following simulation calculation operation until the current simulation scale value is the same as the preset scale value:

[0081] Get the current simulation scale value;

[0082] When the current simulation scale value is less than or equal to the preset scale value, the simulated user load demand, simulated photovoltaic power generation, simulated wind power generation, battery state of charge value and battery rated power value are obtained for each simulation time during the time period from the simulation time value to the preset time value. Based on the simulated user load demand, simulated photovoltaic power generation, simulated wind power generation, battery state of charge value and battery rated power value for each simulation time, the battery utilization, simulated user load demand, total utilization, simulated photovoltaic power generation and simulated wind power generation value for each simulation time are calculated.

[0083] The target renewable energy utilization rate corresponding to the current simulation scale value is calculated based on the battery utilization and simulated user load demand at each simulation time. The target renewable energy absorption rate corresponding to the current simulation scale value is calculated based on the total utilization, simulated photovoltaic power generation and simulated wind power generation at each simulation time.

[0084] The target investment cost value corresponding to the current simulation scale value is calculated based on the current simulation scale value, the photovoltaic unit power cost value, the wind power unit power cost value, and the energy storage unit capacity cost value.

[0085] The target capacity corresponding to the current simulation scale value is calculated based on the target renewable energy utilization rate, the target renewable energy absorption rate, and the target investment cost value.

[0086] The current simulation scale value is added to the preset scale value increment to obtain the updated scale value, and the updated scale value is used as the simulation scale value for the next simulation calculation operation.

[0087] For step S1, in a preferred embodiment, setting a preset scale value and a preset time value specifically includes:

[0088] In a preferred embodiment, the preset scale values ​​include a photovoltaic preset scale value, a wind power preset scale value, and an energy storage preset scale value; wherein, the photovoltaic preset scale value is m, the wind power preset scale value is n, and the energy storage preset scale value is x.

[0089] For step S2, in a preferred embodiment, the photovoltaic unit power cost value C is obtained. s Wind power unit power cost value C w and the unit capacity cost of energy storage C b Specifically, it includes:

[0090] By obtaining the photovoltaic unit power cost value C s Wind power unit power cost value C w and the unit capacity cost of energy storage C b And based on the photovoltaic weighting coefficient S, wind power weighting coefficient W, and energy storage weighting coefficient E at different scale values. B This allows us to calculate the target investment cost corresponding to different scale values.

[0091] For step S3, in a preferred embodiment, such as Figure 2-3 As shown, repeat the following simulation calculation operation until the current simulation scale value is the same as the preset scale value:

[0092] Obtain the current simulation scale value; wherein the simulation scale value is m, n, x;

[0093] When the current simulation scale value is less than or equal to the preset scale value, the simulated user load demand, simulated photovoltaic power generation, simulated wind power generation, battery state of charge value and battery rated power value are obtained for each simulation time during the time period from the simulation time value to the preset time value. Based on the simulated user load demand, simulated photovoltaic power generation, simulated wind power generation, battery state of charge value and battery rated power value for each simulation time, the battery utilization, simulated user load demand, total utilization, simulated photovoltaic power generation and simulated wind power generation value for each simulation time are calculated.

[0094] In a preferred embodiment, the simulated user load demand P corresponding to each simulation time within the time period from the obtained simulation time value to the preset time value. L Simulated photovoltaic power generation P S Simulated wind power generation P W Battery state of charge (SOC) and battery rated power (P) B And based on the simulated user load demand P at each time point L Simulated photovoltaic power generation P S Simulated wind power generation P W Battery state of charge (SOC) and battery rated power (P) B The battery utilization P at each simulation time point was calculated. g Simulated user load demand P L Total utilization P u Simulated photovoltaic power generation P S And simulated wind power generation P w Specifically, it includes:

[0095] like Figure 3 As shown, the following time-time data calculation operations are repeated until the simulated time value matches the preset time value; the time-time data calculation operations include:

[0096] Obtain a simulation time value; where, based on the established simulation models of photovoltaic, wind power, power grid, user load, and energy storage, the simulated user load demand P corresponding to each simulation time can be obtained. L Simulated photovoltaic power generation P S Simulated wind power generation P W Battery state of charge (SOC) and battery rated power (P) B ;

[0097] When the simulation time value is less than or equal to a preset time value, obtain the simulated user load demand P corresponding to the simulation time value. L Simulated photovoltaic power generation P S Simulated wind power generation PW Battery state of charge (SOC) and battery rated power (P) B ;

[0098] It should be noted that when acquiring data at each simulation moment, three operating strategies are used to calculate the data. The three operating strategies are: the photovoltaic and wind power call strategy, the photovoltaic, wind power, energy storage and user demand coordinated operation strategy, and the energy storage (battery) charging and discharging strategy.

[0099] The strategy for dispatching photovoltaic and wind power is as follows: Since user load is generally higher during the day, based on the output characteristics of photovoltaic and wind power, photovoltaic output is higher during the day and more stable than wind power output. Therefore, photovoltaic power is given priority to meet user load. When photovoltaic output is insufficient to meet the real-time user load, wind power will be considered as a supplement.

[0100] The coordinated operation strategy of photovoltaic, wind power, energy storage, and user demand is as follows: when the photovoltaic output P at a certain moment... s Wind power output P w The sum is greater than the user's real-time load P L hour:

[0101] (1) If the battery is allowed to be charged, the photovoltaic and wind power will prioritize charging the battery while meeting the user load.

[0102] (2) When the battery cannot be charged, consider abandoning the battery.

[0103] (3) Due to the greater randomness of wind power, when curtailing electricity, wind power should be considered first, followed by solar power.

[0104] At a certain moment, the photovoltaic power generation P S With wind power generation P w The sum is less than the user load demand P L hour:

[0105] (1) If the battery is allowed to discharge, the battery shall be discharged first to supplement the user's load.

[0106] (2) When the battery is not allowed to discharge, consider the battery utilization rate P. g To supplement.

[0107] First, determine the simulated photovoltaic power generation P. S Is it greater than or equal to the simulated user load demand P? L Since user load is generally higher during the day, a strategy of dispatching photovoltaic and wind power is adopted. Based on the output characteristics of photovoltaic and wind power, photovoltaic output is higher during the day and more stable than wind power output. Therefore, photovoltaic power is given priority to meet user load. When photovoltaic output is insufficient to meet the real-time user load, wind power is considered as a supplement.

[0108] The energy storage charging and discharging strategy is as follows:

[0109] (1) Battery operation allows setting policy

[0110] In a preferred embodiment, the battery's operational permissions are primarily set according to the battery manufacturer's requirements, taking a minimum value X1 and a maximum value X2 as examples, where SOC refers to the battery's state of charge. The battery's operational permission setting strategy is as follows:

[0111] 1) When X1≤SOC≤X2, the battery is allowed to perform normal charging and discharging operations;

[0112] 2) When SOC < X1, only charging operation is allowed. When SOC recovers to X1, normal charging and discharging operation is allowed.

[0113] 3) When SOC > X2, only discharge operation is allowed. When SOC recovers to X2, normal charging and discharging operation is allowed.

[0114] (2) Battery charging and discharging power setting strategy

[0115] 1) When P s,i +P w, -P L, When P > 0, the battery begins charging; where P s, The photovoltaic power generation data corresponding to a certain time i;

[0116] 2) When P s,i +P w, -P L, When the value is less than 0, the battery begins to discharge.

[0117] 3) Battery charging and discharging power P b,i =P L,i -(P s, +P w,i (Discharge is positive, charging is negative).

[0118] (3) Battery rated power limit

[0119] The battery output power must not exceed the rated power P. B ,Right now:

[0120] |P bi |≤P B .

[0121] Firstly, based on the dispatch strategy for photovoltaic (PV) and wind power, since user load is generally higher during the day, and considering the output characteristics of PV and wind power, PV output is higher and more stable during the day compared to wind power. Therefore, PV is prioritized to meet user load. Thus, the simulated PV power generation P is first determined.S Is it greater than or equal to the simulated user load demand P? L In the simulated photovoltaic power generation P S Greater than or equal to the simulated user load demand P L At that time, the simulated user load demand P L As the simulated photovoltaic utilization P Su And based on the simulated photovoltaic power generation P S and simulated user load demand P L The simulated photovoltaic curtailment amount P was calculated. Sa At the same time, the simulated wind power utilization P wu Equal to 0 and simulated wind power generation P w As the simulated wind power curtailment amount P wa ;

[0122] In the simulated photovoltaic power generation P S Less than the simulated user load demand P L Then, based on the simulated photovoltaic power generation P S And simulated wind power generation P w The simulated photovoltaic utilization P was obtained. Su Photovoltaic curtailment amount P Sa Simulated wind power utilization P wu And simulated wind power curtailment P wa Specifically, it includes:

[0123] In the simulated photovoltaic power generation P S Less than the simulated user load demand P L Then, the simulated photovoltaic power generation P will be... S As the simulated photovoltaic utilization P Su And cause the amount of photovoltaic power to be abandoned P Sa The value is 0; determine the simulated wind power generation P. w Is it greater than or equal to the simulated user load demand P? L Subtract simulated photovoltaic utilization P Su The result value, in the simulated wind power generation P w Greater than or equal to the simulated user load demand P L Subtract simulated photovoltaic utilization P Su When the result value is obtained, it is based on the simulated user load demand P. L Subtract simulated photovoltaic utilization P Su The result value is used as the simulated wind power utilization P wu The simulated wind power generation P w Subtract simulated wind power utilization P wu The value is used as the simulated wind power curtailment P wa In the simulation of wind power generation P w Less than the simulated user load demand PL Subtract simulated photovoltaic utilization P Su When calculating the result value, the simulated wind power generation P w As the simulated wind power utilization P wu At the same time, the simulated wind power curtailment P wa =0;

[0124] The simulated photovoltaic utilization P obtained above Su and simulated wind power utilization P wu The total utilization P corresponding to the simulation time value is obtained by adding them together. u And the simulated photovoltaic abandonment amount P Sa And simulated wind power curtailment P wa The first total amount of waste corresponding to the simulation time value is obtained;

[0125] Further determine whether the first total discard amount corresponding to the simulation time value is greater than 0;

[0126] When the first total discard amount corresponding to the simulation time value is greater than 0, then based on the battery state of charge (SOC) and the battery rated power (P)... B The battery utilization P corresponding to the simulation time value is obtained. g The second total discard amount corresponding to the simulation time value specifically includes:

[0127] When the first total discard amount corresponding to the simulation time value is greater than 0, it is determined whether the battery state of charge (SOC) value is less than or equal to the preset maximum battery state value. If the battery SOC value is less than or equal to the preset maximum battery state value, it is determined whether the first total discard amount is less than or equal to the battery rated power P. B When the first total amount of waste is less than or equal to the battery's rated power P B When the first total discarded amount is used as the second total discarded amount, the first total discarded amount is used as the battery charge / discharge power P. b And the battery utilization P corresponding to the simulation time value. g Set to 0, in the first total discard amount P a Greater than the battery's rated power P b When that happens, the battery's rated power P will be... B As the battery charging and discharging power P b The rated power P of the battery b With the first total amount of waste P a The summed values ​​are used as the second total discard amount, and the battery utilization P corresponding to the simulation time value is used as the second total discard amount. g Set to 0;

[0128] When the battery state of charge (SOC) value is greater than the preset maximum SOC value x2, the battery charge / discharge power P will be increased. bThe first total discard amount is equal to 0, and the second total discard amount is taken as the first total discard amount. The battery utilization P corresponding to the simulation time value is also taken as the second total discard amount. g Set to 0;

[0129] When the total amount of waste corresponding to the simulation time value is less than or equal to 0, then based on the battery state of charge (SOC) and the battery rated power (P)... B Simulated user load demand P L and total utilization P u The battery utilization P corresponding to the simulation time value is obtained. g The second total discard amount corresponding to the simulation time value specifically includes:

[0130] When the total amount of waste corresponding to the simulation time value is less than or equal to 0, determine whether the battery state of charge (SOC) value is greater than or equal to the preset minimum battery state value X1.

[0131] When the battery state of charge (SOC) is greater than or equal to the preset minimum battery state value (X1), the battery rated power (P) is determined. B Is it greater than or equal to the simulated user load demand P? L Subtract the total utilization P u The result value is at the battery's rated power P B Greater than or equal to the simulated user load demand P L Subtract the total utilization P u When calculating the result value, the simulated user load demand P will be used. L Subtract the total utilization P u The resulting value is used as the battery charge / discharge power P. b And the battery utilization P corresponding to the simulation time value. g Set to 0, and use the first total waste amount as the second total waste amount; at the battery rated power P B Less than the simulated user load demand P L Subtract the total utilization P u When the result value is reached, the battery charge / discharge power P will be... b The value is equal to 0, and the simulated user load demand P is set to 0. L Subtract the total utilization P u With the battery's rated power P B The sum of the values ​​is used as the battery utilization P corresponding to the simulation time value. g And the first total amount of waste will be used as the second total amount of waste;

[0132] When the battery's state of charge (SOC) is less than the preset minimum battery state value (X1), the battery charging / discharging power P will be increased. b The value equals 0, representing the simulated user load demand P. L Subtract the total utilization P u The resulting value is used as the battery utilization P corresponding to the simulation time value.g The first total abandonment amount is used as the second total abandonment amount; wherein, the second total abandonment amount is output as P. a ;

[0133] The updated time value is obtained by adding the preset time value increment to the simulated time value, and the updated time value is used as the simulated time value for the next operation of calculating the data at each time point.

[0134] In a preferred embodiment, the target renewable energy utilization rate corresponding to the current simulation scale value is calculated based on the battery utilization and simulated user load demand at each simulation time point, specifically including:

[0135] The total battery utilization is obtained by adding up the battery utilization at each simulation time.

[0136] The total user load demand is obtained by adding up the simulated user load demand at each simulation time.

[0137] The target renewable energy utilization rate is calculated according to the first formula; wherein, the first formula is:

[0138]

[0139] Where A1 is the target renewable energy utilization rate, P g总 P represents the total battery utilization. L总 This represents the total user load demand.

[0140] In a preferred embodiment, the step of calculating the target renewable energy absorption rate corresponding to the current simulation scale value based on the total utilization, simulated photovoltaic power generation, and simulated wind power generation at each simulation time specifically includes:

[0141] The total utilization at each simulation moment is added together to obtain the total utilization of wind power and photovoltaic power.

[0142] The total photovoltaic power generation is obtained by adding up the simulated photovoltaic power generation at each simulation time.

[0143] The total wind power generation is obtained by adding up the simulated wind power generation at each simulation time.

[0144] The target renewable energy integration rate is calculated using the second formula; whereby the second formula is:

[0145]

[0146] Where A2 is the target renewable energy integration rate, P u总 P represents the total utilization of wind and solar power. s总 For total photovoltaic power generation, P w总This represents the total wind power generation.

[0147] In a preferred embodiment, the step of calculating the target investment cost value corresponding to the current simulation scale value based on the current simulation scale value, the photovoltaic unit power cost value, the wind power unit power cost value, and the energy storage unit capacity cost value specifically includes:

[0148] The current photovoltaic weight coefficient S is obtained by multiplying the current simulation scale value by the preset photovoltaic weight coefficient and adding the result to the simulation photovoltaic weight coefficient from the previous simulation calculation; wherein, S = S 上一次 +m*L1, where m is the current simulation scale value and L1 is the preset photovoltaic weighting coefficient;

[0149] The current wind power weight coefficient W is obtained by multiplying the current simulation scale value by the preset wind power weight coefficient and adding the result to the simulation wind power weight coefficient from the previous simulation calculation; wherein, W = W 上一次 +n*L2, where n is the current simulation scale value and L2 is the preset wind power weighting coefficient;

[0150] The current energy storage weight coefficient E is obtained by multiplying the current simulation scale value by the preset energy storage weight coefficient and adding the result to the simulation energy storage weight coefficient from the previous simulation calculation. B ;like Figure 3 As shown, in a preferred embodiment, the current energy storage weighting coefficient E B This involves multiplying the current simulation scale value x by the preset energy storage weight coefficient L3, then multiplying by the sum of the current photovoltaic weight coefficient S and the current wind power weight coefficient W, and finally adding this sum to the simulation energy storage weight coefficient E from the previous simulation calculation. B上一次 The result of the addition, i.e., E B =E B上一次 +(S 当前 +W 当前 )x*L3.

[0151] The target investment cost is calculated according to the third formula; wherein, the third formula is:

[0152] C = C s ·S+C w W+C b ·E B ;

[0153] Where C is the target investment cost value, C s Where S is the unit power cost of photovoltaics, and C is the current photovoltaic weighting coefficient. w Where W is the unit power cost of wind power, and C is the current wind power weighting coefficient. b E represents the unit capacity cost of energy storage. B This represents the current energy storage weighting coefficient.

[0154] In a preferred embodiment, the target capacity corresponding to the current simulation scale value is calculated based on the target renewable energy utilization rate, the target renewable energy absorption rate, and the target investment cost value, specifically including:

[0155] Obtain the first capacity weight coefficient, the second capacity weight coefficient, and the third capacity weight coefficient;

[0156] Obtain the target investment cost value obtained from each simulation calculation, and take the target investment cost value with the largest value among all simulation calculations as the current maximum target investment cost;

[0157] The target capacity corresponding to the current simulation scale value is calculated according to the fourth formula; wherein, the fourth formula is:

[0158] G = X1·A1 + X2·A2 - X3·C / C max ;

[0159] Where G is the target capacity, X1 is the first capacity weighting coefficient, X2 is the second capacity weighting coefficient, X3 is the third capacity weighting coefficient, A1 is the target renewable energy utilization rate, A2 is the target renewable energy absorption rate, C is the target investment cost value, and C max This represents the maximum target investment cost.

[0160] The current simulation scale value is added to the preset scale value increment to obtain the updated scale value. The updated scale value is then used as the simulation scale value for the next simulation calculation operation to complete the cyclical calculation of the simulation calculation. This allows us to obtain the target investment cost value and target capacity corresponding to different scales. Through comparative analysis, we can obtain the optimal target investment cost value and target capacity.

[0161] The embodiments of the present invention fully consider the output characteristics and stability of photovoltaic and wind power, and use three operating strategies to calculate the target investment cost and target capacity under different scales. This can improve the utilization rate of renewable energy and increase the renewable energy absorption rate with relatively less initial investment.

[0162] like Figure 4 As shown, based on the various embodiments described above, the present invention provides corresponding device embodiments;

[0163] One embodiment of the present invention provides a capacity-determining device based on the integration of source, grid, load and storage, including: a preset value setting module, a data acquisition module and a repeated simulation calculation operation module;

[0164] The preset value setting module is used to set preset scale values ​​and preset time values;

[0165] The data acquisition module is used to acquire the unit power cost value of photovoltaic power, the unit power cost value of wind power, and the unit capacity cost value of energy storage.

[0166] The repeated simulation calculation operation module is used to repeatedly execute the following simulation calculation operation until the current simulation scale value is the same as the preset scale value:

[0167] Get the current simulation scale value;

[0168] When the current simulation scale value is less than or equal to the preset scale value, the simulated user load demand, simulated photovoltaic power generation, simulated wind power generation, battery state of charge value and battery rated power value are obtained for each simulation time during the time period from the simulation time value to the preset time value. Based on the simulated user load demand, simulated photovoltaic power generation, simulated wind power generation, battery state of charge value and battery rated power value for each simulation time, the battery utilization, simulated user load demand, total utilization, simulated photovoltaic power generation and simulated wind power generation value for each simulation time are calculated.

[0169] The target renewable energy utilization rate corresponding to the current simulation scale value is calculated based on the battery utilization and simulated user load demand at each simulation time. The target renewable energy absorption rate corresponding to the current simulation scale value is calculated based on the total utilization, simulated photovoltaic power generation and simulated wind power generation at each simulation time.

[0170] The target investment cost value corresponding to the current simulation scale value is calculated based on the current simulation scale value, the photovoltaic unit power cost value, the wind power unit power cost value, and the energy storage unit capacity cost value.

[0171] The target capacity corresponding to the current simulation scale value is calculated based on the target renewable energy utilization rate, the target renewable energy absorption rate, and the target investment cost value.

[0172] The current simulation scale value is added to the preset scale value increment to obtain the updated scale value, and the updated scale value is used as the simulation scale value for the next simulation calculation operation.

[0173] It should be noted that the device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Furthermore, in the accompanying drawings of the device embodiments provided by this invention, the connection relationships between modules indicate that they have communication connections, which can be specifically implemented as one or more communication buses or signal lines. Those skilled in the art can understand and implement this without any creative effort.

[0174] Those skilled in the art will clearly understand that, for convenience and simplicity, the specific working process of the device described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0175] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A capacity-determining method based on integrated source-grid-load-storage system, characterized in that, include: Set the preset scale value and preset time value; Obtain the unit power cost value of photovoltaic power, the unit power cost value of wind power, and the unit capacity cost value of energy storage; Repeat the following simulation calculation operation until the current simulation scale value is the same as the preset scale value: Get the current simulation scale value; When the current simulation scale value is less than or equal to the preset scale value, the simulated user load demand, simulated photovoltaic power generation, simulated wind power generation, battery state of charge value and battery rated power value are obtained for each simulation time during the time period from the simulation time value to the preset time value. Based on the simulated user load demand, simulated photovoltaic power generation, simulated wind power generation, battery state of charge value and battery rated power value for each simulation time, the battery utilization, simulated user load demand, total utilization, simulated photovoltaic power generation and simulated wind power generation value for each simulation time are calculated. The target renewable energy utilization rate corresponding to the current simulation scale value is calculated based on the battery utilization and simulated user load demand at each simulation time. The target renewable energy absorption rate corresponding to the current simulation scale value is calculated based on the total utilization, simulated photovoltaic power generation and simulated wind power generation at each simulation time. The target investment cost value corresponding to the current simulation scale value is calculated based on the current simulation scale value, the photovoltaic unit power cost value, the wind power unit power cost value, and the energy storage unit capacity cost value. The target capacity corresponding to the current simulation scale value is calculated based on the target renewable energy utilization rate, the target renewable energy absorption rate, and the target investment cost value. The current simulation scale value is added to the preset scale value increment to obtain the updated scale value, and the updated scale value is used as the simulation scale value for the next simulation calculation operation. The target capacity corresponding to the current simulation scale value is calculated based on the target renewable energy utilization rate, the target renewable energy absorption rate, and the target investment cost value. Specifically, this includes: Obtain the first capacity weight coefficient, the second capacity weight coefficient, and the third capacity weight coefficient; Obtain the target investment cost value obtained each time the simulation calculation is performed, and take the target investment cost value with the largest value among the target investment cost values ​​obtained from each simulation calculation as the current maximum target investment cost; The target capacity corresponding to the current simulation scale value is calculated according to the fourth formula; wherein, the fourth formula is: ； in, For the target capacity, This is the first capacity weighting coefficient. This is the second capacity weighting coefficient. This is the third capacity weighting coefficient. To achieve the target renewable energy utilization rate, To achieve the target renewable energy integration rate, Target investment cost value, This represents the maximum target investment cost.

2. The capacity-determining method based on integrated source-grid-load-storage system as described in claim 1, characterized in that, The process involves obtaining the simulated user load demand, simulated photovoltaic power generation, simulated wind power generation, battery state of charge (SBC) value, and battery rated power value for each simulation time period from the obtained simulation time value to the preset time value. Based on these parameters, the process calculates the battery utilization, simulated user load demand, total utilization, simulated photovoltaic power generation, and simulated wind power generation for each simulation time period. Specifically, this includes: Repeat the following time-time data calculation operations until the simulated time value matches the preset time value; the time-time data calculation operations include: Obtain a simulation time value; When the simulation time value is less than or equal to the preset time value, the simulated user load demand, simulated photovoltaic power generation, simulated wind power generation, battery state of charge value and battery rated power value corresponding to the simulation time value are obtained. When the simulated photovoltaic power generation is greater than or equal to the simulated user load demand, the simulated user load demand is used as the simulated photovoltaic utilization, and the simulated photovoltaic curtailment is calculated based on the simulated photovoltaic power generation and the simulated user load demand. At the same time, the simulated wind power utilization is set to 0, and the simulated wind power generation is used as the simulated wind power curtailment. When the simulated photovoltaic power generation is less than the simulated user load demand, the simulated photovoltaic utilization, photovoltaic curtailment, simulated wind power utilization, and simulated wind power curtailment are obtained based on the simulated photovoltaic power generation and the simulated wind power generation. The total utilization corresponding to the simulation time value is obtained by adding the simulated photovoltaic utilization and the simulated wind power utilization, and the first total abandonment corresponding to the simulation time value is obtained by adding the simulated photovoltaic abandonment and the simulated wind power abandonment. Determine whether the first total abandonment amount corresponding to the simulation time value is greater than 0. If the total abandonment amount corresponding to the simulation time value is greater than 0, then obtain the battery utilization amount and the second total abandonment amount corresponding to the simulation time value based on the battery state of charge value and the battery rated power. If the total abandonment amount corresponding to the simulation time value is less than or equal to 0, then obtain the battery utilization amount and the second total abandonment amount corresponding to the simulation time value based on the battery state of charge value, the battery rated power, the simulated user load demand, and the total utilization amount. The updated time value is obtained by adding the preset time value increment to the simulated time value, and the updated time value is used as the simulated time value for the next operation of calculating the data at each time point.

3. The capacity-determining method based on integrated source-grid-load-storage system as described in claim 2, characterized in that, When the simulated photovoltaic power generation is less than the simulated user load demand, the simulated photovoltaic utilization, photovoltaic curtailment, simulated wind power utilization, and simulated wind power curtailment are obtained based on the simulated photovoltaic power generation and simulated wind power generation, specifically including: When the simulated photovoltaic power generation is less than the simulated user load demand, the simulated photovoltaic power generation is taken as the simulated photovoltaic utilization, and the photovoltaic curtailment is set to 0. The system determines whether the simulated wind power generation is greater than or equal to the simulated user load demand minus the simulated photovoltaic utilization. If the simulated wind power generation is greater than or equal to the simulated user load demand minus the simulated photovoltaic utilization, then the simulated wind power utilization is taken as the simulated wind power utilization, and the simulated wind power curtailment is taken as the simulated wind power curtailment. If the simulated wind power generation is less than the simulated user load demand minus the simulated photovoltaic utilization, then the simulated wind power generation is taken as the simulated wind power utilization, and the simulated wind power curtailment is set to 0.

4. The capacity-determining method based on integrated source-grid-load-storage system as described in claim 2, characterized in that, When the first total abandonment amount corresponding to the simulation time value is greater than 0, the battery utilization amount corresponding to the simulation time value and the second total abandonment amount corresponding to the simulation time value are obtained based on the battery state of charge value and the battery rated power, specifically including: When the first total discard amount corresponding to the simulation time value is greater than 0, it is determined whether the battery state of charge value is less than or equal to the preset maximum battery state value. When the battery state of charge value is less than or equal to the preset maximum battery state value, it is determined whether the first total discard amount is less than or equal to the battery rated power. When the first total discard amount is less than or equal to the battery rated power, the battery rated power is taken as the second total discard amount, and the battery utilization corresponding to the simulation time value is set to 0. When the first total discard amount is greater than the battery rated power, the result of adding the battery rated power and the first total discard amount is taken as the second total discard amount, and the battery utilization corresponding to the simulation time value is set to 0. When the battery state of charge value is greater than the preset maximum battery state value, the first total discard amount is taken as the second total discard amount, and the battery utilization corresponding to the simulation time value is set to 0.

5. The capacity-determining method based on integrated source-grid-load-storage system as described in claim 2, characterized in that, When the total abandonment amount corresponding to the simulation time value is less than or equal to 0, the battery utilization amount corresponding to the simulation time value and the second total abandonment amount corresponding to the simulation time value are obtained based on the battery state of charge value, battery rated power, simulated user load demand, and total utilization amount, specifically including: When the total abandoned amount corresponding to the simulation time value is less than or equal to 0, it is determined whether the battery state of charge value is greater than or equal to the preset minimum battery state value. When the battery state of charge value is greater than or equal to the preset minimum battery state value, it is determined whether the battery rated power is greater than or equal to the result of the simulated user load demand minus the total utilization. When the battery rated power is greater than or equal to the result of the simulated user load demand minus the total utilization, the battery utilization corresponding to the simulation time value is set to 0, and the first total abandoned amount is used as the second total abandoned amount. When the battery rated power is less than the result of the simulated user load demand minus the total utilization, the result of the simulated user load demand minus the sum of the total utilization and the battery rated power is used as the battery utilization corresponding to the simulation time value, and the first total abandoned amount is used as the second total abandoned amount. When the battery state of charge value is less than the preset minimum battery state value, the result of the simulated user load demand minus the total utilization is used as the battery utilization corresponding to the simulation time value, and the first total abandoned amount is used as the second total abandoned amount.

6. The capacity-determining method based on integrated source-grid-load-storage system as described in claim 1, characterized in that, The calculation of the target renewable energy utilization rate corresponding to the current simulation scale value based on the battery utilization and simulated user load demand at each simulation time specifically includes: The total battery utilization is obtained by adding up the battery utilization at each simulation time. The total user load demand is obtained by adding up the simulated user load demand at each simulation time. The target renewable energy utilization rate is calculated according to the first formula; wherein, the first formula is: ； in, To achieve the target renewable energy utilization rate, This represents the total battery utilization. This represents the total user load demand.

7. The capacity-determining method based on integrated source-grid-load-storage system as described in claim 6, characterized in that, The calculation of the target renewable energy absorption rate corresponding to the current simulation scale value based on the total utilization, simulated photovoltaic power generation, and simulated wind power generation at each simulation time specifically includes: The total utilization at each simulation moment is added together to obtain the total utilization of wind power and photovoltaic power. The total photovoltaic power generation is obtained by adding up the simulated photovoltaic power generation at each simulation time. The total wind power generation is obtained by adding up the simulated wind power generation at each simulation time. The target renewable energy integration rate is calculated using the second formula; whereby the second formula is: ； in, To achieve the target renewable energy integration rate, This represents the total utilization of wind and solar power. This represents the total photovoltaic power generation. This represents the total wind power generation.

8. The capacity-determining method based on integrated source-grid-load-storage system as described in claim 1, characterized in that, The calculation of the target investment cost value corresponding to the current simulation scale value based on the current simulation scale value, the photovoltaic unit power cost value, the wind power unit power cost value, and the energy storage unit capacity cost value specifically includes: The current photovoltaic weight coefficient is obtained by multiplying the current simulation scale value by the preset photovoltaic weight coefficient and adding the result to the simulation photovoltaic weight coefficient from the previous simulation calculation. The current wind power weight coefficient is obtained by multiplying the current simulation scale value by the preset wind power weight coefficient and adding the result to the simulation wind power weight coefficient from the previous simulation calculation. The current energy storage weight coefficient is obtained by multiplying the current simulation scale value by the preset energy storage weight coefficient and adding the result to the simulation energy storage weight coefficient from the previous simulation calculation. The target investment cost is calculated according to the third formula; wherein, the third formula is: ； in, For the target investment cost value, This represents the unit power cost of photovoltaic power. This represents the current photovoltaic weighting coefficient. This represents the unit power cost of wind power. This represents the current wind power weighting coefficient. This represents the unit capacity cost of energy storage. This represents the current energy storage weighting coefficient.

9. A capacity-limiting device based on integrated source-grid-load-storage system, characterized in that, include: The module includes a preset value setting module, a data acquisition module, and a module for repeatedly executing simulation calculations. The preset value setting module is used to set preset scale values ​​and preset time values; The data acquisition module is used to acquire the unit power cost value of photovoltaic power, the unit power cost value of wind power, and the unit capacity cost value of energy storage. The repeated simulation calculation operation module is used to repeatedly execute the following simulation calculation operation until the current simulation scale value is the same as the preset scale value: Get the current simulation scale value; When the current simulation scale value is less than or equal to the preset scale value, the simulated user load demand, simulated photovoltaic power generation, simulated wind power generation, battery state of charge value and battery rated power value are obtained for each simulation time during the time period from the simulation time value to the preset time value. Based on the simulated user load demand, simulated photovoltaic power generation, simulated wind power generation, battery state of charge value and battery rated power value for each simulation time, the battery utilization, simulated user load demand, total utilization, simulated photovoltaic power generation and simulated wind power generation value for each simulation time are calculated. The target renewable energy utilization rate corresponding to the current simulation scale value is calculated based on the battery utilization and simulated user load demand at each simulation time. The target renewable energy absorption rate corresponding to the current simulation scale value is calculated based on the total utilization, simulated photovoltaic power generation and simulated wind power generation at each simulation time. The target investment cost value corresponding to the current simulation scale value is calculated based on the current simulation scale value, the photovoltaic unit power cost value, the wind power unit power cost value, and the energy storage unit capacity cost value. The target capacity corresponding to the current simulation scale value is calculated based on the target renewable energy utilization rate, the target renewable energy absorption rate, and the target investment cost value. The current simulation scale value is added to the preset scale value increment to obtain the updated scale value, and the updated scale value is used as the simulation scale value for the next simulation calculation operation. The target capacity corresponding to the current simulation scale value is calculated based on the target renewable energy utilization rate, the target renewable energy absorption rate, and the target investment cost value. Specifically, this includes: Obtain the first capacity weight coefficient, the second capacity weight coefficient, and the third capacity weight coefficient; Obtain the target investment cost value obtained each time the simulation calculation is performed, and take the target investment cost value with the largest value among the target investment cost values ​​obtained from each simulation calculation as the current maximum target investment cost; The target capacity corresponding to the current simulation scale value is calculated according to the fourth formula; wherein, the fourth formula is: ； in, For the target capacity, This is the first capacity weighting coefficient. This is the second capacity weighting coefficient. This is the third capacity weighting coefficient. To achieve the target renewable energy utilization rate, To achieve the target renewable energy integration rate, Target investment cost value, This represents the maximum target investment cost.

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