Capacity configuration method and device of off-grid wind-solar-storage system containing solar-storage integrated machine

Abstract

This disclosure provides a method and apparatus for capacity configuration of an off-grid wind-solar-storage system including an integrated photovoltaic and energy storage unit, relating to the field of energy storage technology. The method includes: determining capacity configuration parameters for the off-grid wind-solar-storage system; determining the hourly power curtailment of the off-grid wind-solar-storage system within a preset time period based on the capacity configuration parameters; accumulating the hourly power curtailment to obtain the total power curtailment under the corresponding capacity configuration parameters; updating the power generation model parameters, independent energy storage model parameters, and integrated photovoltaic-storage unit model parameters within a preset number of iterations, and repeatedly accumulating the hourly power curtailment to obtain the total power curtailment result corresponding to multiple capacity configuration parameters; and selecting the capacity configuration parameter with the minimum total power curtailment as the target parameter configuration result from among the multiple capacity configuration parameters. The technical solution in this disclosure can achieve optimal parameter selection for off-grid wind-solar-storage systems under various capacity configuration schemes, thereby effectively reducing system power curtailment.

Description

Technical Field

[0001] This disclosure relates to the field of energy storage technology, and more specifically, to a method and apparatus for configuring the capacity of an off-grid wind-solar-storage system that includes an integrated photovoltaic-storage unit. Background Technology

[0002] Among existing new energy supply technologies, off-grid wind-solar-storage systems have broad application prospects in remote areas, island power supply, and emergency scenarios due to their advantages of wind-solar complementarity and independent operation. Through the coordinated operation of wind power generation, photovoltaic power generation, and energy storage systems, this system effectively overcomes the intermittency and instability of single energy sources, significantly improving the stability and reliability of power supply.

[0003] To improve the stability and responsiveness of off-grid wind, solar, and energy storage systems, it is necessary to rationally configure the capacity of wind power, solar power, and energy storage equipment. However, the system capacity configuration in related technologies mostly relies on experience, typically employing a simple combination of wind turbines, solar modules, and batteries. While this method is simple to operate, it lacks in-depth analysis of equipment characteristics and system operating characteristics, easily leading to problems such as frequent power curtailment and uneven energy storage load in actual operation. Therefore, there is still room for improvement in the reliability and energy utilization rate of off-grid wind, solar, and energy storage system capacity configuration.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] The purpose of this disclosure is to provide a capacity configuration method for an off-grid wind-solar-storage system with integrated photovoltaic and energy storage, an off-grid wind-solar-storage system with integrated photovoltaic and energy storage, an electronic device, and a computer-readable storage medium. By introducing multiple model parameters and iteratively selecting the capacity configuration result with the minimum total abandoned electricity, the reliability and energy utilization rate of the off-grid wind-solar-storage system capacity configuration can be improved at least to a certain extent.

[0006] Other features and advantages of this disclosure will become apparent from the following detailed description, or may be learned in part from practice of this disclosure.

[0007] According to a first aspect of the present disclosure, a method for configuring the capacity of an off-grid wind-solar-storage system including an integrated photovoltaic (PV) and energy storage unit is provided. The method includes: determining capacity configuration parameters for the off-grid wind-solar-storage system, the capacity configuration parameters including power generation model parameters, independent energy storage model parameters, integrated PV and energy storage unit model parameters, and load model parameters; and based on the capacity configuration parameters, determining the hourly power curtailment of the off-grid wind-solar-storage system within a preset time period, wherein the hourly power curtailment is based on the hourly energy difference between the hourly power of independent wind and solar power, the hourly photovoltaic power of the integrated PV and energy storage unit, and the hourly power of the electricity load. The remaining energy and power constraints for each model are determined based on the parameters of the independent energy storage model and the integrated photovoltaic-energy storage model, respectively. The hourly abandoned power is accumulated to obtain the total abandoned power under the corresponding capacity configuration parameters. Within a preset number of iterations, the parameters of the power generation model, the independent energy storage model, and the integrated photovoltaic-energy storage model are updated, and the hourly abandoned power is accumulated repeatedly to obtain the total abandoned power result corresponding to multiple capacity configuration parameters. Among the multiple capacity configuration parameters, the capacity configuration parameter with the smallest total abandoned power is selected as the target parameter configuration result.

[0008] According to a second aspect of the present disclosure, a capacity configuration device for an off-grid wind-solar-storage system with integrated photovoltaic and energy storage is provided, for implementing the aforementioned capacity configuration method for an off-grid wind-solar-storage system with integrated photovoltaic and energy storage. The system includes: a parameter determination module for determining capacity configuration parameters of the off-grid wind-solar-storage system, the capacity configuration parameters including power generation model parameters, independent energy storage model parameters, integrated photovoltaic and energy storage model parameters, and load model parameters; and a curtailment determination module for determining the hourly curtailment of the off-grid wind-solar-storage system within a preset time period based on the capacity configuration parameters, wherein the hourly curtailment is determined based on the hourly power of independent wind and solar power, the hourly photovoltaic power of the integrated photovoltaic and energy storage system, and the hourly power of the electricity load. The total energy was calculated by calculating the hourly energy difference between the two energy storage models, and then determining the remaining energy and power constraints for each model based on the parameters of the independent energy storage model and the integrated photovoltaic-storage model. The curtailment accumulation module is used to accumulate the hourly curtailment to obtain the total curtailment under the corresponding capacity configuration parameters. The parameter update module is used to update the power generation model parameters, the independent energy storage model parameters, and the integrated photovoltaic-storage model parameters within a preset number of iterations, repeatedly accumulating the hourly curtailment to obtain the total curtailment result corresponding to multiple capacity configuration parameters. The target parameter determination module is used to select the capacity configuration parameter with the smallest total curtailment as the target parameter configuration result from among the multiple capacity configuration parameters.

[0009] According to a third aspect of the present disclosure, an electronic device is provided, comprising: a processor; and a memory storing computer-readable instructions, which, when executed by the processor, implement the capacity configuration method for an off-grid wind-solar-storage system including an integrated photovoltaic and energy storage unit as described in the first aspect.

[0010] According to a fourth aspect of the present disclosure, a computer-readable storage medium is provided, on which a computer program is stored, which, when executed by a processor, implements the capacity configuration method for an off-grid wind-solar-storage system including an integrated photovoltaic and energy storage unit as described in the first aspect.

[0011] The technical solutions provided in this disclosure may have the following beneficial effects:

[0012] The capacity configuration method for off-grid wind-solar-storage systems with integrated photovoltaic and energy storage units in this disclosure has several advantages. Firstly, by introducing multiple capacity configuration parameters, including power generation model parameters, independent energy storage model parameters, integrated photovoltaic and energy storage unit model parameters, and load model parameters, it comprehensively characterizes the dynamic relationship between wind and solar power output, energy storage capacity, and load demand. Compared to configuration methods that only consider a single energy storage model, this expands the system's capacity response space, enabling more flexible adjustments during periods of energy surplus and shortage. Secondly, in calculating hourly curtailment, it not only comprehensively considers the hourly energy difference between independent wind and solar power, integrated photovoltaic power, and the hourly power of the electricity load, but also determines the corresponding remaining energy and power constraints based on the independent energy storage model parameters and the integrated photovoltaic and energy storage unit model parameters, making the curtailment calculation more consistent with the actual system operation. Thirdly, by continuously updating the model parameters within a preset number of iterations, the capacity configuration parameter with the minimum total curtailment is ultimately selected as the target result, achieving a configuration strategy with the minimum curtailment while ensuring the availability of power supply to the load throughout the entire time period. This improves the reliability and energy efficiency of off-grid wind, solar and energy storage system capacity configuration.

[0013] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0014] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0015] Figure 1A flowchart illustrating a capacity configuration method for an off-grid wind-solar-storage system including an integrated photovoltaic and energy storage unit, according to some embodiments of the present disclosure, is shown.

[0016] Figure 2 A schematic diagram of an off-grid wind-solar-storage system according to some embodiments of the present disclosure is shown.

[0017] Figure 3 A schematic diagram of a system capacity configuration model according to an embodiment of the present disclosure is shown.

[0018] Figure 4 A schematic diagram of another system capacity configuration model according to an embodiment of the present disclosure is shown.

[0019] Figure 5 A schematic diagram of another system capacity configuration model according to an embodiment of the present disclosure is shown.

[0020] Figure 6 A schematic diagram of another system capacity configuration model according to an embodiment of the present disclosure is shown.

[0021] Figure 7 A schematic diagram of another system capacity configuration model according to an embodiment of the present disclosure is shown.

[0022] Figure 8 A schematic diagram of another system capacity configuration model according to an embodiment of the present disclosure is shown.

[0023] Figure 9 A schematic diagram of another system capacity configuration model according to an embodiment of the present disclosure is shown.

[0024] Figure 10 A schematic diagram of another system capacity configuration model according to an embodiment of the present disclosure is shown.

[0025] Figure 11 A schematic diagram of another system capacity configuration model according to an embodiment of the present disclosure is shown.

[0026] Figure 12 A schematic diagram of another system capacity configuration model according to an embodiment of the present disclosure is shown.

[0027] Figure 13 A schematic diagram of another system capacity configuration model according to an embodiment of the present disclosure is shown.

[0028] Figure 14 A schematic diagram of another system capacity configuration model according to an embodiment of the present disclosure is shown.

[0029] Figure 15 A schematic diagram of another system capacity configuration model according to an embodiment of the present disclosure is shown.

[0030] Figure 16 A schematic diagram of another system capacity configuration model according to an embodiment of the present disclosure is shown.

[0031] Figure 17 A schematic diagram of another system capacity configuration model according to an embodiment of the present disclosure is shown.

[0032] Figure 18 A schematic diagram of another system capacity configuration model according to an embodiment of the present disclosure is shown.

[0033] Figure 19 A schematic diagram of another system capacity configuration model according to an embodiment of the present disclosure is shown.

[0034] Figure 20 A schematic diagram of another system capacity configuration model according to an embodiment of the present disclosure is shown.

[0035] Figure 21 A schematic diagram of another system capacity configuration model according to an embodiment of the present disclosure is shown.

[0036] Figure 22 A schematic diagram of another system capacity configuration model according to an embodiment of the present disclosure is shown.

[0037] Figure 23 A schematic diagram of another system capacity configuration model according to an embodiment of the present disclosure is shown.

[0038] Figure 24 A schematic diagram of another system capacity configuration model according to an embodiment of the present disclosure is shown.

[0039] Figure 25 A schematic diagram of another system capacity configuration model according to an embodiment of the present disclosure is shown.

[0040] Figure 26 A schematic diagram of another system capacity configuration model according to an embodiment of the present disclosure is shown.

[0041] Figure 27 A schematic diagram of another system capacity configuration model according to an embodiment of the present disclosure is shown.

[0042] Figure 28 The illustration shows a schematic diagram of the composition of an off-grid wind-solar-storage system capacity configuration device including an integrated photovoltaic and energy storage unit according to some embodiments of the present disclosure.

[0043] Figure 29 The schematic diagram illustrates the structural schematic of a computer system of an electronic device according to some embodiments of the present disclosure.

[0044] In the accompanying drawings, the same or corresponding reference numerals indicate the same or corresponding parts. Detailed Implementation

[0045] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this specification. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this specification as detailed in the appended claims.

[0046] The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of this specification. The singular forms “a,” “the,” and “the” as used in this specification and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0047] It should be understood that although the terms first, second, third, etc., may be used in this specification to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this specification, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0048] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be more thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art.

[0049] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this disclosure.

[0050] Furthermore, the accompanying drawings are for illustrative purposes only and are not necessarily drawn to scale. The block diagrams shown in the drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0051] In this example embodiment, a method for configuring the capacity of an off-grid wind-solar-storage system that includes an integrated photovoltaic and energy storage unit is first provided. Figure 1 The illustration schematically shows a flow chart of a capacity configuration method for an off-grid wind-solar-storage system incorporating an integrated photovoltaic (PV) and energy storage unit according to some embodiments of the present disclosure. The integrated PV and energy storage unit can refer to a combined device that integrates a photovoltaic power generation unit and an energy storage unit on the same power conversion and control platform. Figure 1 As shown, the capacity configuration method for this off-grid wind-solar-storage system with integrated photovoltaic and energy storage can include the following steps:

[0052] Step S110: Determine the capacity configuration parameters of the off-grid wind-solar-storage system. The capacity configuration parameters include power generation model parameters, independent energy storage model parameters, integrated solar-storage unit model parameters, and load model parameters.

[0053] Step S120: Based on the capacity configuration parameters, determine the hourly power curtailment of the off-grid wind-solar-storage system within a preset time period. The hourly power curtailment is calculated based on the hourly energy difference between the independent wind and solar power, the photovoltaic power of the integrated photovoltaic-storage unit, and the power of the electricity load. The remaining energy and power constraints of each model are determined according to the independent energy storage model parameters and the integrated photovoltaic-storage unit model parameters.

[0054] Step S130: The hourly abandoned power is accumulated to obtain the total abandoned power under the corresponding capacity configuration parameters;

[0055] Step S140: Within the preset number of iterations, update the power generation model parameters, independent energy storage model parameters, and photovoltaic-storage integrated machine model parameters, and repeatedly accumulate the hourly abandoned power to obtain the total abandoned power result corresponding to multiple capacity configuration parameters.

[0056] Step S150: Among multiple capacity configuration parameters, select the capacity configuration parameter with the smallest total abandoned power as the target parameter configuration result.

[0057] According to the capacity configuration method of the off-grid wind-solar-storage system with integrated photovoltaic and energy storage in this example embodiment, on the one hand, by introducing multiple capacity configuration parameters such as power generation model parameters, independent energy storage model parameters, integrated photovoltaic and energy storage model parameters, and load model parameters, the dynamic relationship between wind and solar power output, energy storage capacity, and load demand can be comprehensively characterized, expanding the response space of the system capacity and enabling more flexible adjustment during periods of energy surplus and shortage. On the other hand, in the calculation of hourly curtailment, not only is the hourly energy difference between the hourly power of independent wind and solar, the hourly photovoltaic power of the integrated photovoltaic and energy storage system, and the hourly power of the electricity load comprehensively considered, but also the corresponding remaining energy and power constraints are determined based on the independent energy storage model parameters and the integrated photovoltaic and energy storage model parameters, making the curtailment calculation more consistent with the actual operating state of the system. Furthermore, by continuously updating the model parameters within a preset number of iterations, the capacity configuration parameter with the minimum total curtailment is finally selected as the target result, which can obtain the configuration strategy with the minimum curtailment while ensuring the availability of load power supply throughout the time period. Thus, the reliability and energy utilization rate of the off-grid wind-solar-storage system capacity configuration are improved.

[0058] The capacity configuration method of the off-grid wind-solar-storage system with integrated photovoltaic and energy storage in this example embodiment will be further explained below.

[0059] In step S110, the capacity configuration parameters of the off-grid wind-solar-storage system are determined. The capacity configuration parameters include power generation model parameters, independent energy storage model parameters, integrated solar-storage unit model parameters, and load model parameters.

[0060] Among them, off-grid wind-solar-storage system can be described as an energy supply system that does not rely on the public power grid. This system combines wind power generation equipment, photovoltaic power generation modules and energy storage devices to achieve independent power supply to the electrical load. Figure 2The diagram illustrates the structure of an off-grid wind-solar-storage system according to some embodiments of the present disclosure. As shown, the off-grid wind-solar-storage system includes independent photovoltaic (PV) units, independent wind power, independent energy storage, PV units, an integrated PV-storage unit, energy storage, a PCS (Power Conversion System), an NCS (New Energy Control System), and a load. The independent PV and independent wind power, as distributed independent renewable energy sources, can independently supply energy to the load. The independent energy storage is connected to the load via the PCS, which performs power conversion and adjusts the charging and discharging direction and power of the independent energy storage, enabling it to work in conjunction with the independent PV and independent wind power to provide stable support for the load. In another path of the system, PV and energy storage together constitute an integrated PV-storage unit, connected to the load via the NCS. The NCS, as the core control device of the integrated PV-storage unit, coordinates the energy distribution relationship between PV and energy storage and controls the path and power of energy injected into the load. The aforementioned multiple paths do not interfere with each other in the system, constructing a multi-source integrated energy supply structure suitable for off-grid scenarios, realizing the coordinated operation between independent photovoltaic, independent wind power, independent energy storage and photovoltaic-storage integrated units, so as to meet the energy demand of the load.

[0061] Capacity configuration parameters represent the set of modeling parameters used to characterize the performance of each subsystem in an off-grid wind-solar-storage system. Power generation model parameters represent parameters used to describe the hourly power output characteristics of wind and solar power generation equipment. Independent energy storage model parameters represent parameters used to describe the state and boundary constraints of energy storage devices independently deployed outside of wind and solar power generation equipment during operation. Integrated photovoltaic-storage unit model parameters represent parameters used to characterize the operational behavior of the integrated photovoltaic-storage unit. Load model parameters represent parameters used to describe the hourly changes in electricity demand within the target area.

[0062] For example, the power generation model parameters include independent hourly wind and solar power output. Among them, the independent wind and solar hourly power can represent the theoretical available power data of wind power and photovoltaic power generation equipment that are directly output without passing through the energy storage unit at various times, and is recorded in hourly granularity.

[0063] Independent energy storage model parameters include energy storage converter power. First battery conversion efficiency First maximum charging depth First maximum discharge depth First energy storage rated capacity First current moment's stored energy First maximum rechargeable capacity ,and And the remaining energy storage capacity at the first current moment. ,and Among them, the energy storage converter power can represent the maximum power transmission capability allowed by the power electronic device used for bidirectional energy conversion in the independent energy storage unit under the current control mode. The first battery conversion efficiency can represent the degree of energy loss during the charging or discharging process of the independent energy storage unit. The first maximum depth of charge can represent the ratio between the maximum acceptable charging amount of the independent energy storage unit and its rated capacity in a single charging cycle. The first maximum depth of discharge can represent the ratio between the maximum power generation that the independent energy storage unit can release in a single discharging cycle and its rated capacity. The first rated energy storage capacity can represent the maximum energy that the independent energy storage unit can store under rated conditions. The first current-time energy storage energy can represent the energy actually stored by the independent energy storage unit at the current time point. The first maximum rechargeable capacity can represent the maximum energy that the independent energy storage unit can be charged into under the current conditions. The first current-time remaining energy storage capacity can represent the remaining energy storage capacity of the independent energy storage unit under the current conditions.

[0064] The model parameters of the integrated photovoltaic and energy storage system include the hourly power of photovoltaic power. Power of integrated photovoltaic and energy storage unit Second battery conversion efficiency Second maximum charging depth Second maximum discharge depth Second energy storage rated capacity Second, the energy stored at the current moment. Second maximum rechargeable capacity ,and And the remaining energy storage capacity at the second current moment. ,and Among them, the photovoltaic hourly power output represents the power output of the photovoltaic modules in the integrated photovoltaic and energy storage unit per hour. The integrated photovoltaic and energy storage unit power output represents the maximum usable output power of the integrated photovoltaic and energy storage unit on the AC side. The second battery conversion efficiency represents the energy conversion efficiency of the energy storage unit in the integrated photovoltaic and energy storage unit during charging or discharging. The second maximum depth of charge represents the ratio between the maximum acceptable charge amount of the energy storage unit in the integrated photovoltaic and energy storage unit in a single charging cycle and its rated capacity. The second maximum depth of discharge represents the ratio between the maximum power generation that the energy storage unit in the integrated photovoltaic and energy storage unit can release in a single discharging cycle and its rated capacity. The second rated energy storage capacity represents the maximum energy that the energy storage unit in the integrated photovoltaic and energy storage unit can store under rated conditions. The second current energy storage energy represents the energy actually stored by the energy storage unit in the integrated photovoltaic and energy storage unit at the current time. The second maximum rechargeable capacity represents the maximum energy that the energy storage unit in the integrated photovoltaic and energy storage unit can be charged into under the current conditions. The second current remaining energy storage capacity represents the remaining energy storage capacity of the energy storage unit in the integrated photovoltaic and energy storage unit under the current conditions.

[0065] Load model parameters include hourly power consumption. Among them, the hourly power consumption load can represent the actual power demand of the power consumption end of the off-grid wind, solar and energy storage system in each hour.

[0066] Unless otherwise specified, the parameter symbols used in this embodiment will be used in the following description.

[0067] In step S120, based on the capacity configuration parameters, the hourly power curtailment of the off-grid wind-solar-storage system within a preset time period is determined. The hourly power curtailment is calculated based on the hourly energy difference between the independent wind and solar power, the photovoltaic power of the integrated photovoltaic-storage unit, and the hourly power of the electricity load. The remaining energy and power constraints corresponding to each model are determined according to the independent energy storage model parameters and the integrated photovoltaic-storage unit model parameters.

[0068] The preset time period can represent the target operating cycle used for capacity configuration assessment and power curtailment calculation. This time period can include multiple consecutive hourly time nodes to reflect the energy supply and demand characteristics of off-grid wind-solar-storage systems under typical operating conditions. Hourly power curtailment can represent the surplus energy that cannot be utilized within each hour of the preset time period due to the generation exceeding the load consumption and the absorption capacity of the energy storage unit. Hourly energy difference can represent the energy difference obtained by subtracting the hourly power of the electricity load from the sum of the hourly power of independent wind and solar power and the hourly power of photovoltaic power, used to assess whether there is an energy gap in the system during that time period. Power constraints can represent the adjustment boundaries defined by the maximum charging power and maximum discharging power corresponding to the current operating state of independent energy storage units and integrated photovoltaic-storage units during energy absorption or release within each hour. Power constraints can be jointly determined by the power of the energy storage converter, battery conversion efficiency, current energy state of the energy storage, and maximum depth of charge / discharge. Based on the parameters of the independent energy storage model and the integrated photovoltaic-energy storage model, the remaining energy and power constraints corresponding to the independent energy storage model and the integrated photovoltaic-energy storage model can be determined respectively. In this step, by combining the hourly energy difference with the remaining energy and power constraints of the energy storage unit, the hourly power curtailment can be accurately calculated.

[0069] In step S130, the hourly abandoned power is accumulated to obtain the total abandoned power under the corresponding capacity configuration parameters. The total abandoned power can represent the cumulative sum of the hourly abandoned power generated by the off-grid wind-solar-storage system in all time periods within a preset time period, and is used to measure the total amount of energy that is not absorbed by the load or energy storage device under the current capacity configuration parameters.

[0070] In step S140, within a preset number of iterations, the parameters of the power generation model, the parameters of the independent energy storage model, and the parameters of the photovoltaic-storage integrated machine model are updated, and the hourly curtailment is repeatedly accumulated to obtain the total curtailment result corresponding to multiple capacity configuration parameters.

[0071] In some embodiments, the total power curtailment result corresponding to multiple capacity configuration parameters can be obtained through the following steps: obtaining a preset upper limit for the number of iterations; using the current capacity configuration parameters as initial configuration parameters, including initial power generation model parameters, initial independent energy storage model parameters, and initial photovoltaic-energy storage integrated machine model parameters; and updating the hourly power of independent wind and solar power based on the configuration parameters of the previous round in each iteration. Hourly power consumption First current moment's stored energy The first remaining energy storage capacity at the current moment Second, the energy stored at the current moment. And the remaining energy storage capacity at the second current moment. The updated capacity configuration parameters are input into the power curtailment calculation process. Steps S120 and S130 are repeated to calculate the corresponding hourly power curtailment and accumulate it to obtain the total power curtailment corresponding to the updated capacity configuration parameters. The capacity configuration parameters and the corresponding total power curtailment results generated in each iteration are recorded to obtain the total power curtailment results corresponding to multiple capacity configuration parameters.

[0072] In step S150, among multiple capacity configuration parameters, the capacity configuration parameter with the minimum total wasted electricity is selected as the target parameter configuration result. This step, by selecting the capacity configuration parameter with the minimum total wasted electricity as the target parameter configuration result, ensures that the final configuration result has a high level of energy utilization, reduces energy waste caused by supply-demand mismatch, and thus improves the rationality and operational efficiency of the off-grid wind, solar, and energy storage system capacity configuration.

[0073] The technical content of the above embodiments will be described in detail below.

[0074] In some embodiments, the hourly power curtailment of off-grid wind, solar, and energy storage systems within a preset time period is determined based on capacity configuration parameters, specifically including the following technical steps:

[0075] The first step is to obtain the first hourly energy difference by subtracting the hourly power of the electrical load from the hourly power of the independent wind and solar power. Among them, the first time-series energy difference It can represent the energy surplus or deficit of independent wind and solar power output relative to the electricity load in each hour.

[0076] The second step is to respond to Determine respectively and , and , and , and First hourly power wastage under each state and the remaining energy storage capacity in the first next moment .

[0077] The first hourly wasted energy can be represented as the portion of the energy surplus that is not absorbed after being allocated to the independent energy storage model for charging, when the hourly power of independent wind and solar power exceeds the hourly power of the electricity load. The first remaining energy storage capacity at the next time step can be represented as the maximum energy that the independent energy storage model can continue to store at the start of the next time step after the independent energy storage charging allocation is completed in the current time step.

[0078] The third step is to determine... as well as Second hourly power wastage in each state And the remaining energy storage capacity in the next second moment .

[0079] The second hourly wasted energy represents the portion of the photovoltaic-storage integrated machine model that cannot be stored within the current time step due to insufficient remaining energy storage capacity. The second remaining energy storage capacity for the next hour represents the maximum energy that the photovoltaic-storage integrated machine can continue to store at the start of the next time step after the charging and distribution of the integrated machine is completed in the current time step.

[0080] The fourth step is to determine the amount of electricity to be abandoned in the current time period based on the first hourly abandoned amount and the second hourly abandoned amount. And the remaining energy storage capacity in the first next moment. And the remaining energy storage capacity in the next second moment This serves as the input for calculating the amount of electricity wasted in the next time period. Specifically, the amount of electricity wasted in the current time period... This can represent the total amount of energy that, within the current time step, is not stored by independent energy storage units or the energy storage units in the integrated photovoltaic-energy storage system, after deducting the hourly power consumption. .

[0081] Unless otherwise specified, the parameter symbols used in this embodiment will be used in the following description.

[0082] Furthermore, when This indicates that the independent wind and solar power output can meet the load; any excess energy can be stored in the independent energy storage system. In the integrated photovoltaic and energy storage unit, all photovoltaic output is stored in the unit's energy storage capacity. Since the energy exchange between independent wind and solar power and the integrated photovoltaic and energy storage unit is independent, for energy storage within independent energy storage, it can be based on… Determined by independent energy storage model parameters and For the energy storage unit in a photovoltaic-energy storage integrated system, the parameters of the integrated photovoltaic-energy storage model can be used to determine the energy storage unit. and .

[0083] Therefore, regarding the above response Determine respectively and , and , and , and First hourly power wastage under each state and the remaining energy storage capacity in the first next moment The specific process is as follows:

[0084] 1. When and When, it indicates the power of the energy storage converter. Insufficient to absorb the first hourly energy difference This will result in power wastage. Furthermore, the remaining energy storage capacity in the independent energy storage model at the first current moment... Insufficient, unable to accommodate excess electrical energy This will result in power wastage. and It can be represented as:

[0085]

[0086] A schematic diagram of the system capacity configuration model under this state is shown below. Figure 3 As shown. Furthermore, in Figures 3 to 27 In this context, "energy source" refers to the energy source in an off-grid wind-solar-storage system, including stand-alone photovoltaic (PV) units, stand-alone wind power units, stand-alone energy storage units, and integrated PV-storage units. "Energy flowing through the PCS / NCS" represents the energy path from the energy source to the energy storage unit or AC load after passing through the Power Conversion System (PCS) or the Net-connected Control System (NCS) of the integrated PV-storage unit, reflecting the intermediate stage of energy regulation and transmission. "Energy storage battery charge" represents the amount of electricity injected into the energy storage battery unit after regulation by the PCS or NCS, representing the effective energy actually stored in the battery system. "Energy terminal" refers to the energy unit that ultimately carries the system's energy storage state, i.e., the total energy held by the energy storage battery system at the current time, including the stored portion and the remaining usable capacity. This refers to the energy output from the photovoltaic system to the AC side in a photovoltaic-storage integrated unit. This indicates that the photovoltaic output in the integrated photovoltaic and energy storage system supplements the energy consumed by the load. This indicates the energy supplied by the photovoltaic power generation in the integrated photovoltaic and energy storage system to supplement the energy stored in the independent energy storage model. This indicates the energy supplied by the photovoltaic power generation to supplement the energy stored in the integrated photovoltaic and energy storage system. This represents the energy consumed by energy storage to replenish the load in an independent energy storage model. This indicates the energy consumed by the energy storage in the integrated photovoltaic and energy storage unit to supplement the load.

[0087] Continue to refer to Figure 3 At the energy source end, the power of the energy storage converter Insufficient to absorb the first hourly energy difference This will result in the first power wastage. The energy flowing through the converter is converted into effective charging energy after being adjusted for battery conversion efficiency. Greater than the remaining energy storage capacity at the first current moment in the independent energy storage model If this happens, some energy cannot be absorbed by the energy storage, resulting in a second instance of wasted power, and the remaining capacity of the energy storage at the first current moment... Completely occupied.

[0088] 2. When and When, it indicates the power of the energy storage converter. Insufficient to absorb the first hourly energy difference This will result in power curtailment. However, in the independent energy storage model, the remaining energy storage capacity at the first current moment... Enough, capable of accommodating excess electrical energy .but and It can be represented as:

[0089]

[0090] A schematic diagram of the system capacity configuration model under this state is shown below. Figure 4 As shown, at the energy source end, the power of the energy storage converter... Insufficient to absorb the first hourly energy difference This will result in one instance of power wastage. The energy flowing through the converter is converted into effective charging energy after being adjusted for battery conversion efficiency. Less than the remaining energy storage capacity at the first current moment in the independent energy storage model , Effectively absorbed, and the remaining energy storage capacity at the first current moment. occupied .

[0091] 3. When and When, it indicates the power of the energy storage converter. Sufficient, capable of absorbing the first hourly energy difference The remaining energy storage capacity at the first current moment in the independent energy storage model. Insufficient, unable to accommodate excess electrical energy This will result in power wastage. and It can be represented as:

[0092]

[0093] A schematic diagram of the system capacity configuration model under this state is shown below. Figure 5 As shown, specifically, at the energy source end, the power of the energy storage converter... Sufficient, capable of absorbing the first hourly energy difference The energy flowing through the converter is converted into effective charging energy after being adjusted for battery conversion efficiency. Greater than the remaining energy storage capacity at the first current moment in the independent energy storage model If some energy cannot be absorbed by the energy storage, it will result in wasted electricity, and the remaining capacity of the energy storage at the first current moment will be... Completely occupied.

[0094] 4. When and When, it indicates the power of the energy storage converter. Sufficient, capable of absorbing the first hourly energy difference Furthermore, the remaining energy storage capacity at the first current moment in the independent energy storage model... Enough, capable of accommodating excess electrical energy ,but and It can be represented as:

[0095]

[0096] A schematic diagram of the system capacity configuration model under this state is shown below. Figure 6 As shown, specifically, at the energy source end, the power of the energy storage converter... Sufficient, capable of absorbing the first hourly energy difference The energy flowing through the converter is converted into effective charging energy after being adjusted for battery conversion efficiency. Greater than the remaining energy storage capacity at the first current moment in the independent energy storage model In this case, all the effective charging energy is absorbed by the energy storage, and there will be no waste of electricity, and the remaining capacity of the energy storage at the first current moment will be [not specified]. occupied .

[0097] For the above-mentioned determinations as well as Second hourly power wastage in each state And the remaining energy storage capacity in the next second moment The specific process is as follows:

[0098] 1. When At that time, it indicates the remaining energy storage capacity in the second current moment of the photovoltaic-energy storage integrated machine model. Not enough, cannot accommodate This will result in power wastage. and It can be represented as:

[0099]

[0100] A schematic diagram of the system capacity configuration model under this state is shown below. Figure 7 As shown, specifically, at the energy source end, the hourly power of photovoltaics... Output power, the remaining energy storage capacity at the second current moment in the photovoltaic-storage integrated machine model. Insufficient, unable to accommodate the effective charging energy obtained after conversion efficiency of the battery. And the remaining energy storage capacity at the second current moment Completely occupied.

[0101] 2. When At that time, it indicates the remaining energy storage capacity in the second current moment of the photovoltaic-energy storage integrated machine model. Enough, able to accommodate .but and It can be represented as:

[0102]

[0103] A schematic diagram of the system capacity configuration model under this state is shown below. Figure 8 As shown, at the energy source end, the hourly power of photovoltaics... Output power, the remaining energy storage capacity at the second current moment in the photovoltaic-storage integrated machine model. It is sufficient to accommodate the effective charging energy after conversion efficiency of the battery. And the remaining energy storage capacity at the second current moment occupied .

[0104] In some embodiments, when When the independent wind and solar power output is insufficient to meet the load, additional energy sources are needed to supplement the load. The priority order is as follows: photovoltaic power supplementation in the integrated photovoltaic-storage model, energy storage power supplementation in the integrated photovoltaic-storage model, and energy storage power supplementation in the independent energy storage model. The second hourly energy difference can then be calculated using the hourly power output of independent wind and solar power, the hourly power output of photovoltaic power, and the hourly power output of the electrical load. ,and Then, based on the capacity configuration parameters and The sign of the value determines the amount of electricity wasted in the current period. The remaining energy storage capacity at the first next moment And the remaining energy storage capacity in the next second moment .

[0105] if This indicates that the independent wind and solar power output plus the photovoltaic output in the integrated photovoltaic and energy storage unit meets the load. In this case, the load can be determined separately. and , and , Current time period power consumption under each state The remaining energy storage capacity at the first next moment And the remaining energy storage capacity in the next second moment .

[0106] For ease of description, the following parameter can be defined: the energy output from the photovoltaic power generation unit to the AC side in the integrated photovoltaic and energy storage system. In a photovoltaic-storage integrated system, the photovoltaic output supplements the energy consumed by the load. In a photovoltaic-storage integrated machine, the photovoltaic output supplements the energy stored in the independent energy storage model. In a photovoltaic-storage integrated unit, the photovoltaic output supplements the energy stored in the integrated photovoltaic-storage unit. Energy consumed by energy storage to supplement load in an independent energy storage model In a photovoltaic-storage integrated system, energy storage replenishes the energy consumed by the load. Unless otherwise specified, the parameter symbols used in this embodiment will be used in the following descriptions.

[0107] for and The status indicates the photovoltaic output of the integrated photovoltaic and energy storage system at this time, that is, the hourly photovoltaic power output. Power of the integrated photovoltaic and energy storage unit Due to limitations, not all output can be sent to the AC side, and the power of the integrated optical storage unit is also limited. and independent scenery contribute Unable to fully replenish load power Further supplementation from the independent energy storage model is needed. On the DC side, the remaining capacity of the energy storage in the integrated photovoltaic-energy storage model may be insufficient. Insufficient power supply leads to power curtailment. In this case, the energy stored in the independent energy storage model replenishes the energy consumed by the load. With remaining capacity at the next moment The maximum energy output of the energy storage in the independent energy storage model at the current moment Energy storage converter power And the minimum value of load power shortage is determined by:

[0108]

[0109] Therefore, in some embodiments, it is determined and Current period power consumption under the current status The remaining energy storage capacity at the first next moment And the remaining energy storage capacity in the next second moment This includes: determining separately and In each state , as well as .

[0110] when This indicates the remaining energy storage capacity in the integrated photovoltaic and energy storage unit model after the photovoltaic output of the integrated photovoltaic and energy storage unit is transmitted to the AC side. Not enough, cannot accommodate This will result in power wastage. At this time:

[0111]

[0112] A schematic diagram of the system capacity configuration model under this state is shown below. Figure 9 As shown, specifically, at the energy source end, the hourly power of independent wind and solar power... The energy consumed by energy storage to supplement the load in the independent energy storage model, and the energy output of photovoltaic power generation to the AC side in the integrated photovoltaic-energy storage unit. And the energy from photovoltaic power supplementing the energy stored in the integrated photovoltaic and energy storage system. To exert force, and equal The photovoltaic output of a photovoltaic-storage integrated unit refers to the energy generated by the photovoltaic system to supplement the energy stored in the integrated unit. After being transmitted to the AC side, the remaining energy storage capacity in the integrated photovoltaic and energy storage unit model Not enough, cannot accommodate , that is This will result in power wastage, and the remaining energy storage capacity at the second moment... Completely occupied.

[0113] when This indicates the remaining energy storage capacity in the integrated photovoltaic and energy storage unit model after the photovoltaic output of the integrated photovoltaic and energy storage unit is transmitted to the AC side. Enough, able to accommodate .at this time:

[0114]

[0115] A schematic diagram of the system capacity configuration model under this state is shown below. Figure 10 As shown, specifically, at the energy source end, the hourly power of independent wind and solar power... Energy consumed by energy storage to supplement load in the independent energy storage model The energy output from the photovoltaic power generation unit to the AC side in a photovoltaic-storage integrated unit. And the energy from photovoltaic power supplementing the energy stored in the integrated photovoltaic and energy storage system. To exert force, and equal The photovoltaic output of a photovoltaic-storage integrated unit refers to the energy generated by the photovoltaic system to supplement the energy stored in the integrated unit. After being transmitted to the AC side, the remaining energy storage capacity in the integrated photovoltaic and energy storage unit model Enough, can accommodate The second remaining energy storage capacity at the current moment occupied .

[0116] for and The situation indicates that the photovoltaic output of the integrated photovoltaic and energy storage unit is currently... Power of integrated photovoltaic and energy storage unit Due to limitations, not all power can be output to the AC side; the power of the integrated photovoltaic and energy storage unit... and independent scenery contribute Able to fully replenish load power At this point, there is no need for additional energy replenishment from the energy storage in the independent energy storage model. Excess energy after load replenishment is prioritized to charge the energy storage in the integrated photovoltaic and energy storage model, and secondarily to charge the energy storage in the independent energy storage model.

[0117] Therefore, in some embodiments, it is determined and Current period power consumption under the current status The remaining energy storage capacity at the first next moment And the remaining energy storage capacity in the next second moment Including: in response to Determine the corresponding , as well as ; in response to Determine respectively and at the same time , and at the same time , and at the same time , and at the same time , and at the same time , and at the same time , and at the same time , and at the same time In each state , as well as .

[0118] Specifically, when This indicates the remaining energy storage capacity in the integrated photovoltaic and energy storage unit model after the photovoltaic output of the integrated photovoltaic and energy storage unit has been used to supplement the load consumption. It is sufficient to accommodate excess energy from photovoltaic power generation. .at this time:

[0119]

[0120] A schematic diagram of the system capacity configuration model under this state is shown below. Figure 11 As shown, at the energy source end, the hourly power of independent wind and solar power... The energy output from the photovoltaic power generation unit to the AC side in a photovoltaic-storage integrated unit. And the energy from photovoltaic power supplementing the energy stored in the integrated photovoltaic and energy storage system. To exert force, and equal The photovoltaic output of a photovoltaic-storage integrated unit refers to the energy generated by the photovoltaic system to supplement the energy stored in the integrated unit. After being transmitted to the AC side, the remaining energy storage capacity in the integrated photovoltaic and energy storage unit model Enough, can accommodate The second remaining energy storage capacity at the current moment occupied .

[0121] when This indicates the remaining energy storage capacity in the integrated photovoltaic and energy storage unit model after the photovoltaic output of the integrated photovoltaic and energy storage unit has been used to supplement the load consumption. Not enough to accommodate the excess energy output from photovoltaic power plants. Therefore, excess photovoltaic output from the integrated photovoltaic-storage unit will flow to the AC side to charge the energy storage in the independent energy storage model. In this case, it may be due to... , as well as The magnitude of the energy storage device causes power curtailment, but the DC side will not cause power curtailment. In the integrated photovoltaic and energy storage model, the energy storage is charged to full capacity. At this point:

[0122]

[0123] A schematic diagram of the system capacity configuration model under this state is shown below. Figure 12 As shown, specifically, the remaining energy storage capacity in the integrated photovoltaic and energy storage model Enough, can accommodate , This indicates the energy output of the photovoltaic system that supplements the energy stored in the integrated photovoltaic and energy storage system. Energy converted by battery conversion efficiency, and the remaining energy storage capacity at the second moment. Completely occupied.

[0124] Furthermore, in meeting Under the premise of this, the following situations will be explained in detail:

[0125] 1. When and at the same time At that time, due to the power of the integrated photovoltaic and energy storage unit Energy storage converter power And the remaining energy storage capacity at the first current moment in the independent energy storage model The magnitude of the energy consumption caused power wastage. At this time:

[0126]

[0127] A schematic diagram of the system capacity configuration model under this state is shown below. Figure 13 As shown, there were a total of three instances of power wastage. The first was due to the power consumption of the integrated photovoltaic and energy storage unit. Unable to meet the energy demand of photovoltaic power output to the AC side in integrated photovoltaic and energy storage systems. The second instance of power wastage was due to... The third reason for the power wastage was due to The resulting wasted electricity is the first time the remaining energy storage capacity is... Completely occupied.

[0128] 2. When and at the same time At that time, due to the power of the integrated photovoltaic and energy storage unit Energy storage converter power The magnitude of the energy consumption caused power wastage. At this time:

[0129]

[0130] A schematic diagram of the system capacity configuration model under this state is shown below. Figure 14 As shown, there were a total of two instances of power wastage. The first was due to the power consumption of the integrated photovoltaic and energy storage unit. Unable to meet the energy demand of photovoltaic power output to the AC side in integrated photovoltaic and energy storage systems. The second instance of power wastage was due to... The resulting wasted electricity is the first time the remaining energy storage capacity is... occupied .

[0131] 3. When and at the same time At that time, due to the power of the integrated photovoltaic and energy storage unit The remaining energy storage capacity at the first current moment in the independent energy storage model The magnitude of the energy consumption caused power wastage. At this time:

[0132]

[0133] A schematic diagram of the system capacity configuration model under this state is shown below. Figure 15 As shown, there were a total of two instances of power wastage. The first was due to the power consumption of the integrated photovoltaic and energy storage unit. Unable to meet the energy demand of photovoltaic power output to the AC side in integrated photovoltaic and energy storage systems. The second instance of power wastage was due to... The resulting wasted electricity is the first time the remaining energy storage capacity is... Completely occupied.

[0134] 4. When and at the same time At that time, due to the power of the integrated photovoltaic and energy storage unit The magnitude of the energy consumption caused power wastage. At this time:

[0135]

[0136] A schematic diagram of the system capacity configuration model under this state is shown below. Figure 16 As shown, only the power of the integrated photovoltaic and energy storage unit... Unable to meet the energy demand of photovoltaic power output to the AC side in integrated photovoltaic and energy storage systems. When a power wastage occurs, the remaining energy storage capacity at the first moment is... occupied .

[0137] 5. When and at the same time At that time, due to the power of the energy storage converter And the remaining energy storage capacity at the first current moment in the independent energy storage model The magnitude of the energy consumption caused power wastage. At this time:

[0138]

[0139] A schematic diagram of the system capacity configuration model under this state is shown below. Figure 17 As shown, there were a total of two instances of power wastage. The first was due to... The second instance of power wastage was due to... The resulting wasted electricity is the first time the remaining energy storage capacity is... Completely occupied.

[0140] 6. When and at the same time At that time, due to the power of the energy storage converter The magnitude of the energy consumption caused power wastage. At this time:

[0141]

[0142] A schematic diagram of the system capacity configuration model under this state is shown below. Figure 18 As shown, only in When a power wastage occurs, the remaining energy storage capacity at the first moment is... occupied .

[0143] 7. When and at the same time At that time, due to the remaining energy storage capacity at the first current moment in the independent energy storage model... The magnitude of the energy consumption caused power wastage. At this time:

[0144]

[0145] A schematic diagram of the system capacity configuration model under this state is shown below. Figure 19 As shown, only in When a power wastage occurs, the remaining energy storage capacity at the first moment is... Completely occupied.

[0146] 8. When and at the same time At this time, there will be no power wastage.

[0147]

[0148] A schematic diagram of the system capacity configuration model under this state is shown below. Figure 20 As shown, in this state there is no power wastage, and the remaining energy storage capacity at the first current moment is... occupied .

[0149] for The state indicates that the photovoltaic output of the integrated photovoltaic and energy storage unit can be fully output to the AC side. The excess energy after the load consumption is replenished is first used to charge the energy storage in the integrated photovoltaic and energy storage unit model, and then to charge the energy storage in the independent energy storage model.

[0150] Therefore, in some embodiments, it is determined Current period power consumption under the current status The remaining energy storage capacity at the first next moment And the remaining energy storage capacity in the next second moment Including: in response to Determine the corresponding , as well as ; in response to Determine respectively and , and , and , and In each state , as well as .

[0151] when This indicates the remaining energy storage capacity in the integrated photovoltaic and energy storage model at the current moment after the photovoltaic output of the integrated photovoltaic and energy storage unit has compensated for the load consumption. Enough, capable of holding excess energy .at this time:

[0152]

[0153] A schematic diagram of the system capacity configuration model under this state is shown below. Figure 11 As shown, at the energy source end, the hourly power of independent wind and solar power... The energy output from the photovoltaic power generation unit to the AC side in a photovoltaic-storage integrated unit. And the energy from photovoltaic power supplementing the energy stored in the integrated photovoltaic and energy storage system. To exert force, and equal The photovoltaic output of a photovoltaic-storage integrated unit refers to the energy generated by the photovoltaic system to supplement the energy stored in the integrated unit. After being transmitted to the AC side, the remaining energy storage capacity in the integrated photovoltaic and energy storage unit model Enough, can accommodate The second remaining energy storage capacity at the current moment occupied .

[0154] when This indicates the remaining energy storage capacity in the integrated photovoltaic and energy storage model at the current moment after the photovoltaic output of the integrated photovoltaic and energy storage unit has compensated for the load consumption. Not enough, unable to hold excess energy. Therefore, excess photovoltaic output from the integrated photovoltaic-storage unit will flow to the AC side to charge the energy storage in the independent energy storage model. In this case, it may be due to... as well as The magnitude of the energy loss causes power curtailment, but the DC side will not cause power curtailment. In the photovoltaic-storage integrated model, the energy storage is charged to full capacity. At this time:

[0155]

[0156] A schematic diagram of the system capacity configuration model under this state is shown below. Figure 12 As shown, specifically, the remaining energy storage capacity in the integrated photovoltaic and energy storage model Enough, can accommodate , This indicates the energy output of the photovoltaic system that supplements the energy stored in the integrated photovoltaic and energy storage system. Energy converted by battery conversion efficiency, and the remaining energy storage capacity at the second moment. Completely occupied.

[0157] In satisfying Under the premise of, and with a detailed explanation of the following situations:

[0158] 1. When and At that time, due to the power of the energy storage converter and the remaining energy storage capacity at the current moment in the independent energy storage model The magnitude of the energy consumption caused power wastage. At this time:

[0159]

[0160] A schematic diagram of the system capacity configuration model under this state is shown below. Figure 17 As shown, there were a total of two instances of power wastage. The first was due to... The second instance of power wastage was due to... The resulting wasted electricity is the first time the remaining energy storage capacity is... Completely occupied.

[0161] 2. When and At that time, due to the power of the energy storage converter The magnitude of the energy consumption caused power wastage. At this time:

[0162]

[0163] A schematic diagram of the system capacity configuration model under this state is shown below. Figure 18 As shown, only in When a power wastage occurs, the remaining energy storage capacity at the first moment is... occupied .

[0164] 3. When and At that time, due to the remaining energy storage capacity in the independent energy storage model at the current moment... The magnitude of the energy consumption caused power wastage. At this time:

[0165]

[0166] A schematic diagram of the system capacity configuration model under this state is shown below. Figure 19 As shown, only in When a power wastage occurs, the remaining energy storage capacity at the first moment is... Completely occupied.

[0167] 4. When and At that time, there will be no power wastage. At this time:

[0168]

[0169] A schematic diagram of the system capacity configuration model under this state is shown below. Figure 20 As shown, in this state there is no power wastage, and the remaining energy storage capacity at the first current moment is... occupied .

[0170] Furthermore, when This indicates that the combined output of independent wind and solar power and the photovoltaic output of the integrated photovoltaic-storage unit cannot meet the load. In this case, an additional energy source is needed to further supplement the load, with the priority order being: supplementary energy storage output in the integrated photovoltaic-storage unit model, and supplementary energy storage output in the independent energy storage model. At this time, [the following can be done]: The hourly energy difference between the independent wind and solar power output, the photovoltaic power output of the integrated photovoltaic and energy storage unit, and the energy storage energy and load power at the current moment in the integrated photovoltaic and energy storage unit model is determined to obtain the third hourly energy difference. Then, based on the capacity configuration parameters, The positive or negative sign determines the amount of electricity wasted in the current period. The remaining energy storage capacity at the first next moment And the remaining energy storage capacity in the next second moment .

[0171] In some embodiments, when At this time, it indicates that the independent wind and solar power output, the photovoltaic power output of the integrated photovoltaic and energy storage unit, and the energy storage in the integrated photovoltaic and energy storage unit model can meet the load at the current moment. Furthermore, when the load is met... At that time, determine respectively and , and , Current time period power consumption under each state And the remaining energy storage capacity in the next second moment When satisfied At that time, determine the amount of electricity wasted in the current time period. Zero as well as .

[0172] Specifically, when When, it indicates that the photovoltaic output of the integrated photovoltaic and energy storage unit is at this time. The energy stored in the integrated photovoltaic and energy storage model at the current moment The sum is limited by the power of the integrated PV and energy storage unit, and cannot be fully output to the AC side. Furthermore, the power of the integrated PV and energy storage unit... and independent scenery contribute Unable to fully replenish load power Further supplementation from the independent energy storage model is needed. The DC side may be affected by the current remaining capacity of the energy storage in the integrated photovoltaic-energy storage model. Insufficient power supply leads to power curtailment. In this case, the energy stored in the independent energy storage model replenishes the energy consumed by the load. With the remaining energy storage capacity at the next moment The maximum energy output of the energy storage in the independent energy storage model at the current moment Energy storage converter power And the minimum value of load power shortage is determined by:

[0173]

[0174] In satisfying Under the premise of this, the following situations will be explained in detail:

[0175] 1. When and At that time, after the photovoltaic output of the integrated photovoltaic and energy storage unit is transmitted to the AC side, the remaining energy storage capacity in the integrated photovoltaic and energy storage unit model at the current moment is... Not enough, cannot accommodate This will result in power wastage. At this time:

[0176]

[0177] A schematic diagram of the system capacity configuration model under this state is shown below. Figure 21 As shown, after the photovoltaic output of the integrated photovoltaic and energy storage unit is transmitted to the AC side, the remaining energy storage capacity in the integrated photovoltaic and energy storage unit model at the current moment is... Not enough, cannot accommodate This will result in one instance of power wastage, and the second instance will affect the remaining energy storage capacity at the current moment. Completely occupied.

[0178] 2. When and At that time, after the photovoltaic output of the integrated photovoltaic and energy storage unit is transmitted to the AC side, the remaining energy storage capacity in the integrated photovoltaic and energy storage unit model at the current moment is... Enough, able to accommodate .at this time:

[0179]

[0180] A schematic diagram of the system capacity configuration model under this state is shown below. Figure 22 As shown, after the photovoltaic output of the integrated photovoltaic and energy storage unit is transmitted to the AC side, the remaining energy storage capacity in the integrated photovoltaic and energy storage unit model at the current moment is... Enough, can accommodate No power wasted during the entire process; secondly, the remaining energy storage capacity at the current moment... occupied .

[0181] 3. When At that time, the photovoltaic output of the integrated photovoltaic and energy storage unit All of these will replenish the load consumption, and the energy storage in the integrated photovoltaic and energy storage unit model will also replenish part of the load's energy consumption until the current output power of the integrated photovoltaic and energy storage unit reaches [a certain value]. The electricity lost due to load shortage is replenished by energy storage in the independent energy storage model. At this time:

[0182]

[0183] A schematic diagram of the system capacity configuration model under this state is shown below. Figure 23 As shown, the energy source end can include independent wind and solar hourly power. First current moment's stored energy Photovoltaic hourly power And the energy stored at the second current moment The entire system will replenish the load consumption, and no power will be wasted.

[0184] when When, it indicates that the power of the integrated photovoltaic and energy storage unit is at this time. and independent scenery contribute Able to fully replenish load power At this point, no additional energy replenishment is needed from the independent energy storage model. Furthermore, since there is no energy input for storage, there will be no power curtailment. At this time:

[0185]

[0186] A schematic diagram of the system capacity configuration model under this state is shown below. Figure 24 As shown, the hourly power of photovoltaic power... and independent scenery contribute Able to fully replenish load power At this point, no additional energy replenishment is needed from the independent energy storage model, and no power is wasted.

[0187] In some embodiments, when The time interval indicates that the sum of the independent wind and solar power output and the energy storage capacity in the integrated solar-energy storage model cannot meet the current load power. In this case, an additional energy source is needed to supplement the load, meaning the current energy storage capacity in the independent energy storage model is required to supplement the load power. Therefore, when the load power is met... At that time, determine respectively as well as Current time period power consumption under each state And the remaining energy storage capacity in the next second moment When satisfied At that time, determine the amount of electricity wasted in the current time period. Zero as well as .

[0188] when When, it indicates that the photovoltaic output of the integrated photovoltaic and energy storage unit is at this time. Power of integrated photovoltaic and energy storage unit Due to limitations, not all energy can be output to the AC side. Excess energy not output to the AC side will charge the energy storage in the integrated photovoltaic-energy storage model, which may be affected by the current remaining capacity of the energy storage in the integrated photovoltaic-energy storage model. The magnitude of the load causes power wastage. At this time, in the independent energy storage model, energy storage replenishes the energy consumed by the load. With the remaining energy storage capacity at the next moment The maximum energy output of the energy storage in the independent energy storage model at the current moment Energy storage converter power And the minimum value of load power shortage is determined by:

[0189]

[0190] In satisfying Under the condition that, when At that time, after the photovoltaic output of the integrated photovoltaic and energy storage unit is transmitted to the AC side, the remaining energy storage capacity in the integrated photovoltaic and energy storage unit model at the current moment is... Not enough, cannot accommodate This will result in power wastage. At this time:

[0191]

[0192] A schematic diagram of the system capacity configuration model under this state is shown below. Figure 25 As shown, when At that time, after the photovoltaic output of the integrated photovoltaic and energy storage unit is transmitted to the AC side, the remaining energy storage capacity at the second current moment... Not enough, cannot accommodate This will result in power wastage, and the remaining energy storage capacity at the second moment... Completely occupied.

[0193] when At that time, after the photovoltaic output of the integrated photovoltaic and energy storage unit is transmitted to the AC side, the remaining energy storage capacity in the integrated photovoltaic and energy storage unit model at the current moment is... Enough, able to accommodate .at this time:

[0194]

[0195] A schematic diagram of the system capacity configuration model under this state is shown below. Figure 26 As shown, when At that time, after the photovoltaic output of the integrated photovoltaic and energy storage unit is transmitted to the AC side, the remaining energy storage capacity at the second current moment... Enough, can accommodate This will not result in power curtailment, and the remaining energy storage capacity at the second current moment will be [not specified]. occupied .

[0196] Furthermore, when When, it indicates that the photovoltaic output of the integrated photovoltaic and energy storage unit is at this time. It can fully replenish the load consumption, and there will be no power wastage, that is: At this time, the energy stored in the photovoltaic-storage integrated unit model replenishes the energy consumed by the load. With the remaining energy storage capacity at the next moment The maximum energy output of the integrated photovoltaic and energy storage unit model at the current moment. Power of integrated photovoltaic and energy storage unit With photovoltaic power The minimum value of the difference determines:

[0197]

[0198] Energy consumed by energy storage to supplement load in the stand-alone energy storage model With the remaining energy storage capacity at the next moment The maximum energy output of the energy storage in the independent energy storage model at the current moment Energy storage converter power And the minimum value of load power shortage is determined by:

[0199]

[0200] A schematic diagram of the system capacity configuration model under this state is shown below. Figure 27 As shown, the hourly power of photovoltaic power... and energy storage converter power It can fully replenish the load consumption and there will be no power wastage.

[0201] Furthermore, this disclosure also provides an off-grid wind-solar-storage system capacity configuration device that includes an integrated photovoltaic-storage unit. (Refer to...) Figure 28 As shown, the off-grid wind-solar-storage system capacity configuration device 2800, which includes a photovoltaic-storage integrated unit, may include: a parameter determination module 2810, a power curtailment determination module 2820, a power curtailment accumulation module 2830, a parameter update module 2840, and a target parameter determination module 2850. Wherein:

[0202] The parameter determination module 2810 can be used to determine the capacity configuration parameters of the off-grid wind-solar-storage system. The capacity configuration parameters include power generation model parameters, independent energy storage model parameters, integrated photovoltaic-storage unit model parameters, and load model parameters.

[0203] The curtailment determination module 2820 can be used to determine the hourly curtailment of off-grid wind, solar and energy storage systems within a preset time period based on capacity configuration parameters. The hourly curtailment is calculated based on the hourly energy difference between the hourly power of independent wind and solar, the hourly power of photovoltaic integrated photovoltaic system and the hourly power of electricity load, and the remaining energy and power constraints corresponding to each model are determined according to the parameters of independent energy storage model and photovoltaic integrated photovoltaic system model.

[0204] The power wastage accumulation module 2830 can be used to accumulate the power wastage hourly to obtain the total power wastage under the corresponding capacity configuration parameters;

[0205] The parameter update module 2840 can be used to update the power generation model parameters, independent energy storage model parameters, and photovoltaic-storage integrated machine model parameters within a preset number of iterations, and repeatedly accumulate the hourly abandoned power to obtain the total abandoned power result corresponding to multiple capacity configuration parameters.

[0206] The target parameter determination module 2850 can be used to select the capacity configuration parameter with the minimum total abandoned electricity from multiple capacity configuration parameters as the target parameter configuration result.

[0207] The specific details of each module in the off-grid wind, solar and energy storage system capacity configuration device with integrated photovoltaic and energy storage have been described in detail in the corresponding off-grid wind, solar and energy storage system capacity configuration method with integrated photovoltaic and energy storage, so they will not be repeated here.

[0208] It should be noted that although several modules or units of the off-grid wind-solar-storage system capacity configuration device, including the integrated photovoltaic and energy storage unit, have been mentioned in the detailed description above, this division is not mandatory. In fact, according to the embodiments of this disclosure, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided into multiple modules or units.

[0209] Furthermore, in an exemplary embodiment of this disclosure, an electronic device is also provided that can implement the above-described off-grid wind-solar-storage system capacity configuration method including the integrated photovoltaic and energy storage unit.

[0210] Those skilled in the art will understand that various aspects of this disclosure can be implemented as a system, method, or program product. Therefore, various aspects of this disclosure can be embodied in the following forms: a completely hardware embodiment, a completely software embodiment (including firmware, microcode, etc.), or an embodiment combining hardware and software aspects, collectively referred to herein as a "circuit," "module," or "system."

[0211] The following reference Figure 29 To describe an electronic device 2900 according to an embodiment of the present disclosure. Figure 29 The electronic device 2900 shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments disclosed herein.

[0212] like Figure 29 As shown, the electronic device 2900 is manifested in the form of a general-purpose computing device. The components of the electronic device 2900 may include, but are not limited to: at least one processing unit 2910, at least one storage unit 2920, a bus 2930 connecting different system components (including storage unit 2920 and processing unit 2910), and a display unit 2940.

[0213] The storage unit stores program code, which can be executed by the processing unit 2910, causing the processing unit 2910 to perform the steps described in the "Exemplary Methods" section of this specification according to various exemplary embodiments of this disclosure. The storage unit 2920 may include a readable medium in the form of a volatile storage unit, such as a random access memory (RAM) unit 2921 and / or a cache memory unit 2922, and may further include a read-only memory unit (ROM) unit 2923.

[0214] Storage unit 2920 may also include a program / utility 2924 having a set (at least one) program module 2925, such program module 2925 including but not limited to: operating system, one or more application programs, other program modules and program data, each or some combination of these examples may include an implementation of a network environment.

[0215] Bus 2930 can represent one or more of several types of bus structures, including memory cell bus or memory cell controller, peripheral bus, graphics acceleration port, processing unit, or local bus using any of the multiple bus structures.

[0216] Electronic device 2900 can also communicate with one or more external devices 2970 (e.g., keyboard, pointing device, Bluetooth device, etc.), one or more devices that enable a user to interact with electronic device 2900, and / or any device that enables electronic device 2900 to communicate with one or more other computing devices (e.g., router, modem, etc.). This communication can be performed via input / output (I / O) interface 2950. Furthermore, electronic device 2900 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public networks, such as the Internet) via network adapter 2960. As shown, network adapter 2960 communicates with other modules of electronic device 2900 via bus 2930. It should be understood that, although not shown in the figures, other hardware and / or software modules can be used in conjunction with electronic device 2900, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0217] From the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein can be implemented by software or by combining software with necessary hardware.

[0218] In exemplary embodiments of this disclosure, a computer-readable storage medium is also provided, on which a program product capable of implementing the methods described above is stored. In some possible embodiments, various aspects of this disclosure may also be implemented as a program product including program code that, when the program product is run on a terminal device, causes the terminal device to perform the steps described in the "Exemplary Methods" section of this specification according to various exemplary embodiments of this disclosure.

[0219] The program product for implementing the above-described capacity configuration method for an off-grid wind-solar-storage system with integrated photovoltaic and energy storage according to embodiments of this disclosure can be a portable compact disc read-only memory (CD-ROM) and include program code, and can run on a terminal device, such as a personal computer. However, the program product of this disclosure is not limited thereto. In this document, the readable storage medium can be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0220] The program product may employ any combination of one or more readable media. A readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of readable storage media (a non-exhaustive list) include: electrical connections having one or more wires, portable disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0221] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, carrying readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A readable signal medium may also be any readable medium other than a readable storage medium, capable of sending, propagating, or transmitting programs for use by or in conjunction with an instruction execution system, apparatus, or device.

[0222] Furthermore, the above figures are merely illustrative of the processes included in the method according to exemplary embodiments of this disclosure and are not intended to be limiting. It is readily understood that the processes shown in the above figures do not indicate or limit the temporal order of these processes. Additionally, it is readily understood that these processes may be executed synchronously or asynchronously, for example, in multiple modules.

[0223] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A method for configuring the capacity of an off-grid wind-solar-storage system including an integrated photovoltaic and energy storage unit, characterized in that, include: Determine the capacity configuration parameters for off-grid wind-solar-storage systems, including power generation model parameters, independent energy storage model parameters, integrated solar-storage unit model parameters, and load model parameters. Based on the capacity configuration parameters, the hourly power curtailment of the off-grid wind-solar-storage system within a preset time period is determined. The hourly power curtailment is calculated based on the hourly energy difference between the hourly power of independent wind and solar power, the hourly power of photovoltaic power of the integrated photovoltaic-storage unit, and the hourly power of the electricity load. The remaining energy and power constraints corresponding to each model are determined according to the parameters of the independent energy storage model and the parameters of the integrated photovoltaic-storage unit model. The hourly wasted power is summed to obtain the total wasted power under the corresponding capacity configuration parameters; Within a preset number of iterations, update the parameters of the power generation model, the parameters of the independent energy storage model, and the parameters of the photovoltaic-storage integrated machine model, and repeatedly accumulate the hourly abandoned power to obtain the total abandoned power result corresponding to multiple capacity configuration parameters; Among the multiple capacity configuration parameters, the capacity configuration parameter with the smallest total abandoned power is selected as the target parameter configuration result; The power generation model parameters include independent hourly wind and solar power. ; The independent energy storage model parameters include the energy storage converter power. First battery conversion efficiency First maximum charging depth First maximum discharge depth First energy storage rated capacity First current moment's stored energy First maximum rechargeable capacity and the remaining energy storage capacity at the first current moment. ; The parameters of the integrated photovoltaic and energy storage model include the hourly photovoltaic power. Power of integrated photovoltaic and energy storage unit Second battery conversion efficiency Second maximum charging depth Second maximum discharge depth Second energy storage rated capacity Second, the energy stored at the current moment. Second maximum rechargeable capacity And the remaining energy storage capacity at the second current moment. ; The load model parameters include hourly power consumption. ; The step of determining the hourly power curtailment of the off-grid wind-solar-storage system within a preset time period based on the capacity configuration parameters includes: obtaining a first hourly energy difference based on the difference between the hourly power of the independent wind and solar power and the hourly power of the electricity load. ; in response to Determine respectively and , and , and , and First hourly power wastage under each state and the remaining energy storage capacity in the first next moment ; determine respectively as well as Second hourly power wastage in each state And the remaining energy storage capacity in the next moment. The current time period's abandoned power is determined based on the first hourly abandoned power and the second hourly abandoned power. and the remaining energy storage capacity at the first next moment and the remaining energy storage capacity at the second next moment This serves as the input for calculating the amount of electricity wasted in the next time period.

2. The capacity configuration method for an off-grid wind-solar-storage system including an integrated photovoltaic and energy storage unit as described in claim 1, characterized in that, Also includes: In response to ,use The second time-series energy difference is obtained. ; if Determine respectively and , and , Current time period power consumption under each state The remaining energy storage capacity at the first next moment And the remaining energy storage capacity in the next moment. .

3. The capacity configuration method for an off-grid wind-solar-storage system including an integrated photovoltaic and energy storage unit as described in claim 2, characterized in that, Sure and Current period power consumption under the current status The remaining energy storage capacity at the first next moment And the remaining energy storage capacity in the next moment. ,include: Determine separately and And P NPS + P S <P L In each state , as well as .

4. The capacity configuration method for an off-grid wind-solar-storage system including an integrated photovoltaic and energy storage unit as described in claim 2, characterized in that, Sure and Current period power consumption under the current status The remaining energy storage capacity at the first next moment And the remaining energy storage capacity in the next moment. ,include: In response to Determine the corresponding , as well as ; In response to Determine respectively and at the same time , and at the same time , and at the same time , and at the same time , and at the same time , and at the same time , and at the same time , and at the same time In each state , as well as ; in, This refers to the energy output from the photovoltaic system to the AC side in a photovoltaic-storage integrated unit. This indicates the energy consumed by the load in the photovoltaic power generation of the integrated photovoltaic and energy storage system.

5. The capacity configuration method for an off-grid wind-solar-storage system including an integrated photovoltaic and energy storage unit as described in claim 4, characterized in that, Sure Current period power consumption under the current status The remaining energy storage capacity at the first next moment And the remaining energy storage capacity in the next moment. ,include: In response to Determine the corresponding , as well as ; In response to Determine respectively and , and , and , and In each state , as well as .

6. The capacity configuration method for an off-grid wind-solar-storage system including an integrated photovoltaic and energy storage unit according to claim 2, characterized in that, Also includes: In response to ,use The third time-series energy difference is obtained. ; if When satisfied At that time, determine respectively and , and , In each state , as well as When satisfied At that time, determine the amount of electricity wasted in the current time period. Zero as well as .

7. The capacity configuration method for an off-grid wind-solar-storage system including an integrated photovoltaic and energy storage unit as described in claim 6, characterized in that, Also includes: In response to When satisfied At that time, determine respectively as well as In each state , as well as ; When satisfied At that time, determine the amount of electricity wasted in the current time period. Zero as well as .

8. A capacity configuration device for an off-grid wind-solar-storage system incorporating a photovoltaic-storage integrated unit, used to implement the capacity configuration method for an off-grid wind-solar-storage system incorporating a photovoltaic-storage integrated unit as described in any one of claims 1 to 7, characterized in that, The device includes: The parameter determination module is used to determine the capacity configuration parameters of the off-grid wind-solar-storage system. The capacity configuration parameters include power generation model parameters, independent energy storage model parameters, integrated photovoltaic-storage unit model parameters, and load model parameters. The power curtailment determination module is used to determine the hourly power curtailment of the off-grid wind-solar-storage system within a preset time period based on the capacity configuration parameters. The hourly power curtailment is calculated based on the hourly energy difference between the hourly power of independent wind and solar power, the hourly power of photovoltaic power of the integrated photovoltaic-storage unit, and the hourly power of the electricity load, and after determining the remaining energy and power constraints corresponding to each model according to the independent energy storage model parameters and the integrated photovoltaic-storage unit model parameters. The power wastage accumulation module is used to accumulate the hourly power wastage to obtain the total power wastage under the corresponding capacity configuration parameters; The parameter update module is used to update the power generation model parameters, the independent energy storage model parameters, and the photovoltaic-storage integrated machine model parameters within a preset number of iterations, and repeatedly accumulate the hourly abandoned power to obtain the total abandoned power result corresponding to multiple capacity configuration parameters. The target parameter determination module is used to select the capacity configuration parameter with the minimum total abandoned power from the plurality of capacity configuration parameters as the target parameter configuration result.

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