Method and device for determining power supply capacity of regional power grid

Abstract

The embodiment of the invention provides a method and device for determining the power supply capacity of a regional power grid, relates to the technical field of electric power, and can improve the accuracy of determining the power supply capacity of the regional power grid. The method for determining the power supply capacity of the regional power grid comprises the following steps: obtaining a pre-constructed operation output model of multiple types of power supply units, and a pre-determined optimization target and constraint conditions of time sequence production simulation, wherein the multiple types of power supply units comprise conventional units and new energy units; determining an output sequence of the multiple types of power units based on the operation output model, the optimization target and the constraint condition, wherein the output sequence is used for representing the output condition of the multiple types of power units at each moment; determining the power generation capacity of the conventional unit and the power generation capacity of the new energy unit based on the output sequence; and determining the power supply capacity of the regional power grid based on the power generation capacity of the conventional unit and the power generation capacity of the new energy unit.

Description

Technical Field

[0001] The present application relates to the field of electric power technology, and in particular to a method and device for determining the power supply capacity of a regional power grid. Background Art

[0002] Against the backdrop of global energy structural transformation and rapid economic and social development, the power system is facing unprecedented challenges, including energy security, green and low-carbon transformation, and ever-changing electricity demand. These challenges require the power grid to strengthen the research and management of power system reliability. The reliability of the power system mainly includes two core elements: safety and adequacy. Safety refers to the ability of the system to maintain stable operation when encountering disturbance events, while adequacy involves the ability of the system to meet electricity demand under normal operating conditions.

[0003] As a key component of the national power grid, the security and adequacy of the power supply capacity of the regional power grid is directly related to the stable development of the regional economy and the social security. In recent years, with the large-scale access of renewable energy such as wind power and solar energy, the uncertainty of power grid operation has increased significantly, posing a huge challenge to the traditional power system planning and operation mode. Therefore, the quantitative evaluation research on the power supply capacity of regional power grids containing multiple power sources has important practical significance, which can provide macro-guidance and reference basis for resource allocation, and help to scientifically and rationally plan and operate the power system, thereby improving the adaptability and reliability of the power system in a complex and changing environment.

[0004] However, traditional evaluation methods mainly focus on the impact of forced equipment outages on power system load loss, such as load loss probability, load loss expectation and other indicators. These methods are often too one-sided and fail to fully reflect the operating characteristics of different types of power sources. In addition, traditional evaluation methods cannot simulate the power characteristics of multiple types of power sources in different time periods, resulting in low evaluation accuracy. Summary of the invention

[0005] In order to solve the above problems, the present application provides a method and device for determining the power supply capacity of a regional power grid.

[0006] In a first aspect, a method for determining power supply capacity of a regional power grid is provided, comprising:

[0007] Obtain pre-built operating output models of multiple types of power units, and pre-determined optimization objectives and constraints of sequential production simulation. Multiple types of power units include conventional units and new energy units.

[0008] The output sequence of multiple types of power units is determined based on the operating output model, optimization objectives and constraints. The output sequence is used to characterize the output conditions of multiple types of power units at each moment.

[0009] Determine the power generation capacity of conventional units and new energy units based on the output sequence;

[0010] The power supply capacity of the regional power grid is determined based on the power generation capacity of conventional units and the power generation capacity of new energy units.

[0011] Furthermore, conventional units include: thermal power units, hydropower units, and new energy units include: wind power units, photovoltaic units;

[0012] The steps of constructing the operating output model of multiple types of power units include:

[0013] An operating output model of the thermal power unit is constructed based on the obtained output upper and lower limits and up and down ramp rates of the thermal power unit;

[0014] Based on the acquired forced output, expected output and average output of the hydropower unit, an operating output model of the hydropower unit is constructed;

[0015] Building an operating output model of the wind turbine generator set based on the acquired rated power and wind speed information of the wind turbine generator set;

[0016] The operating output model of the photovoltaic unit is constructed based on the obtained rated power and light intensity of the photovoltaic unit.

[0017] Furthermore, the constraints include: system reserve constraints, load balance constraints, and important tie line transmission capacity constraints;

[0018] The steps to determine constraints include:

[0019] Determine the system backup constraint based on the acquired power source sequence number, power source number, backup bearing capacity and backup required capacity of the backup power source;

[0020] Determine a load balancing constraint based on the acquired power supply sequence number, total number of power supplies, power supply capacity, and power load of the power supply;

[0021] The transmission capacity constraints of important tie lines are determined based on the acquired tie line transmission power.

[0022] Furthermore, the power generation capacity of the conventional units and the power generation capacity of the new energy units are determined based on the output sequence, including:

[0023] Obtain the output status of conventional units at each moment and the output status of new energy units at each moment in the output sequence;

[0024] Determine the initial power generation capacity of the conventional unit based on the output of the conventional unit at each moment, and determine the initial power generation capacity of the new energy unit based on the output of the new energy unit at each moment;

[0025] The power generation capacity of the conventional units is determined based on the initial power generation capacity of the conventional units, and the power generation capacity of the new energy units is determined based on the initial power generation capacity of the new energy units.

[0026] Further, the initial power generation capacity of the conventional unit is determined based on the output of the conventional unit at each moment, and the initial power generation capacity of the new energy unit is determined based on the output of the new energy unit at each moment, including:

[0027] The initial power generation capacity of the new energy unit is determined based on the output of the new energy unit at each moment and the number of simulation steps obtained in the peak load period.

[0028] Further, the power generation capacity of the conventional unit is determined based on the initial power generation capacity of the conventional unit, and the power generation capacity of the new energy unit is determined based on the initial power generation capacity of the new energy unit, including:

[0029] The power generation capacity of conventional units is determined based on their initial power generation capacity, the penalty coefficient of plant power consumption obtained in advance, the penalty coefficient of maintenance, and the equivalent strong wave outage rate; and the power generation capacity of new energy units is determined based on their initial power generation capacity, the penalty coefficient of plant power consumption, the penalty coefficient of maintenance, and the equivalent strong wave outage rate.

[0030] Furthermore, the power supply capacity of the regional power grid is determined based on the power generation capacity of the conventional units and the power generation capacity of the new energy units, including:

[0031] Determine a first capacity indicator based on the power generation capacity of conventional units, the power generation capacity of new energy units and the peak load of the regional power grid obtained;

[0032] The second capacity index is determined based on the power generation capacity of conventional units, the power generation capacity of new energy units, the acquired reserve capacity of the regional power grid, the average load and the sum of the transmission power of the tie line;

[0033] The power supply capacity of the regional power grid is determined based on the first capacity indicator and the second capacity indicator.

[0034] In a second aspect, the present application provides a device for determining power supply capacity of a regional power grid, comprising:

[0035] An acquisition module is used to acquire pre-built operation output models of multiple types of power units, and pre-determined optimization objectives and constraints of sequential production simulation. Multiple types of power units include conventional units and new energy units.

[0036] The first determination module is used to determine the output sequence of multiple types of power units based on the operation output model, optimization objectives and constraints, and the output sequence is used to characterize the output conditions of the multiple types of power units at each moment;

[0037] The second determination module is used to determine the power generation capacity of the conventional unit and the power generation capacity of the new energy unit based on the output sequence;

[0038] The third determination module is used to determine the power supply capacity of the regional power grid based on the power generation capacity of the conventional units and the power generation capacity of the new energy units.

[0039] Furthermore, conventional units include: thermal power units, hydropower units, and new energy units include: wind power units, photovoltaic units;

[0040] The steps of constructing the operating output model of multiple types of power units include:

[0041] An operating output model of the thermal power unit is constructed based on the obtained output upper and lower limits and up and down ramp rates of the thermal power unit;

[0042] Based on the acquired forced output, expected output and average output of the hydropower unit, an operating output model of the hydropower unit is constructed;

[0043] Building an operating output model of the wind turbine generator set based on the acquired rated power and wind speed information of the wind turbine generator set;

[0044] The operating output model of the photovoltaic unit is constructed based on the obtained rated power and light intensity of the photovoltaic unit.

[0045] Furthermore, the constraints include: system reserve constraints, load balance constraints, and important tie line transmission capacity constraints;

[0046] The steps to determine constraints include:

[0047] Determine the system backup constraint based on the acquired power source sequence number, power source number, backup bearing capacity and backup required capacity of the backup power source;

[0048] Determine a load balancing constraint based on the acquired power supply sequence number, total number of power supplies, power supply capacity, and power load of the power supply;

[0049] The transmission capacity constraints of important tie lines are determined based on the acquired tie line transmission power.

[0050] Furthermore, the second determining module includes:

[0051] The output acquisition unit is used to acquire the output conditions of the conventional units and the output conditions of the new energy units at each moment in the output sequence;

[0052] An initial capacity determination unit, used to determine the initial power generation capacity of the conventional unit based on the output of the conventional unit at each moment, and to determine the initial power generation capacity of the new energy unit based on the output of the new energy unit at each moment;

[0053] The capacity determination unit determines the power generation capacity of the conventional unit based on the initial power generation capacity of the conventional unit, and determines the power generation capacity of the new energy unit based on the initial power generation capacity of the new energy unit.

[0054] Furthermore, the initial capability determination unit is specifically used for:

[0055] The initial power generation capacity of the new energy unit is determined based on the output of the new energy unit at each moment and the number of simulation steps obtained in the peak load period.

[0056] Furthermore, the capability determination unit is specifically used for:

[0057] The power generation capacity of conventional units is determined based on their initial power generation capacity, the penalty coefficient of plant power consumption obtained in advance, the penalty coefficient of maintenance, and the equivalent strong wave outage rate; and the power generation capacity of new energy units is determined based on their initial power generation capacity, the penalty coefficient of plant power consumption, the penalty coefficient of maintenance, and the equivalent strong wave outage rate.

[0058] Furthermore, the third determination module includes:

[0059] A first indicator determination unit, configured to determine a first capacity indicator based on the power generation capacity of the conventional unit, the power generation capacity of the new energy unit, and the acquired peak load of the regional power grid;

[0060] A second indicator determination unit is used to determine a second capacity indicator based on the power generation capacity of the conventional unit, the power generation capacity of the new energy unit, the acquired spare capacity of the regional power grid, the average load and the sum of the transmission power of the tie line;

[0061] The power supply capacity determination unit is used to determine the power supply capacity of the regional power grid based on the first capacity indicator and the second capacity indicator.

[0062] In a third aspect, the present application provides an electronic device including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method for determining the power supply capacity of the regional power grid when executing the program.

[0063] In a fourth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method for determining the power supply capacity of the regional power grid.

[0064] In a fifth aspect, the present application provides a computer program product, including a computer program / instruction, which, when executed by a processor, implements the steps of the method for determining the power supply capacity of the regional power grid.

[0065] The technical solution provided in the embodiment of the present application can accurately describe the operating characteristics of different types of power supply units, such as conventional units and new energy units, through the pre-constructed operating output model of multiple types of power supplies, thereby improving the accuracy of determining the power supply capacity of the regional power grid. Furthermore, the output sequence of multiple types of power supply units is determined through the operating output model of multiple types of power supplies, the optimization objectives and constraints of the time-series production simulation, the output of different types of power supply units at each moment is characterized, and the specific power generation capacity of multiple types of power supplies is determined based on the output sequence. Taking into account the dynamic changes of different types of power supply units in different time periods and their volatility and uncertainty, the accuracy of determining the power supply capacity of the regional power grid is further improved. Finally, the power supply capacity of the regional power grid is determined by the power generation capacity of conventional units and the power generation capacity of new energy units, which can more accurately predict the power supply capacity of the power grid and improve the reliability of the power supply of the regional power grid, so as to help scientifically and rationally plan and operate the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] In order to more clearly illustrate some embodiments of this specification or technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0067] Figure 1 A flowchart of a method for determining the power supply capacity of a regional power grid provided in an embodiment of the present application;

[0068] Figure 2 A flowchart of another method for determining the power supply capacity of a regional power grid provided in an embodiment of the present application;

[0069] Figure 3 A flowchart of another method for determining the power supply capacity of a regional power grid provided in an embodiment of the present application;

[0070] Figure 4 A flowchart of another method for determining the power supply capacity of a regional power grid provided in an embodiment of the present application;

[0071] Figure 5 A flowchart of another method for determining the power supply capacity of a regional power grid provided in an embodiment of the present application;

[0072] Figure 6 A schematic diagram of the structure of a device for determining the power supply capacity of a regional power grid provided in an embodiment of the present application;

[0073] Figure 7 A schematic diagram of the structure of a computer device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0074] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in some embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on some embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this specification.

[0075] It should be noted that the terms "first", "second", etc. in the specification and claims of this document and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of this document described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, device, product or equipment that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or equipment. It should be noted that the acquisition, storage, use, processing, etc. of data in the technical solution of this application comply with the relevant provisions of relevant laws and regulations.

[0076] As described in the background technology, the traditional method for determining the power supply capacity of a regional power grid mainly focuses on the impact of forced equipment shutdown on the loss of load in the power system, for example, by measuring indicators such as load loss probability and load loss expectation. However, this method is too simplistic when determining the actual power supply capacity of a regional power grid, especially in the context of large-scale access to regional power grids by new energy sources such as wind power and photovoltaics. The operating characteristics of these new energy power units are significantly different from those of traditional power sources, and their output volatility and uncertainty need to be fully considered to ensure the accuracy of the evaluation results.

[0077] In addition, the traditional method of determining the power supply capacity of regional power grids fails to fully capture the output volatility and uncertainty of different types of power units in different time periods, resulting in low accuracy in the calculated power supply capacity of regional power grids. For example, the output of wind power and photovoltaic power is affected by weather conditions and has obvious seasonal and intraday variations, which are often ignored in traditional assessments.

[0078] Furthermore, the traditional method of determining the power supply capacity of a regional power grid often does not fully consider the actual influencing factors such as factory power consumption, annual planned maintenance, and equivalent forced outages when calculating its power supply capacity. These factors have a significant impact on the power supply capacity of the regional power grid. Ignoring these factors may lead to an overestimation or underestimation of the power supply capacity, thereby affecting the overall judgment of the regional power grid.

[0079] Finally, the evaluation indicators in the traditional method of determining the power supply capacity of the regional power grid usually only focus on the load supply and demand balance at a single moment, lacking a comprehensive quantitative analysis of the load demand and power supply capacity during the entire study period, resulting in the inability to comprehensively consider the contribution of different types of power sources in different load periods, and unable to effectively reflect the power supply reliability and abundance of the regional power grid during peak load periods.

[0080] Based on this, the present application provides a method for determining the power supply capacity of a regional power grid, such as Figure 1 As shown, it is a flow chart of a method for determining the power supply capacity of a regional power grid provided in an embodiment of the present application, comprising the following steps:

[0081] S101, obtaining pre-built operation output models of multiple types of power generation units, and pre-determined optimization objectives and constraints of sequential production simulation.

[0082] Among them, the various types of power supply units include: conventional units and new energy units.

[0083] S102: Determine the output sequence of multiple types of power units based on the operating output model, optimization objectives and constraints.

[0084] Among them, the output sequence is used to characterize the output conditions of multiple types of power units at each moment.

[0085] S103. Determine the power generation capacity of the conventional units and the power generation capacity of the new energy units based on the output sequence.

[0086] S104. Determine the power supply capacity of the regional power grid based on the power generation capacity of the conventional units and the power generation capacity of the new energy units.

[0087] The technical solution provided in the embodiment of the present application can accurately describe the operating characteristics of different types of power supply units, such as conventional units and new energy units, through the pre-constructed operating output model of multiple types of power supplies, thereby improving the accuracy of determining the power supply capacity of the regional power grid. Furthermore, the output sequence of multiple types of power supply units is determined through the operating output model of multiple types of power supplies, the optimization objectives and constraints of the time-series production simulation, the output of different types of power supply units at each moment is characterized, and the specific power generation capacity of multiple types of power supplies is determined based on the output sequence. Taking into account the dynamic changes of different types of power supply units in different time periods and their volatility and uncertainty, the accuracy of determining the power supply capacity of the regional power grid is further improved. Finally, the power supply capacity of the regional power grid is determined by the power generation capacity of conventional units and the power generation capacity of new energy units, which can more accurately predict the power supply capacity of the power grid and improve the reliability of the power supply of the regional power grid, so as to help scientifically and rationally plan and operate the power system.

[0088] The following is an explanation of each of the above steps:

[0089] S101, obtaining pre-built operation output models of multiple types of power generation units, and pre-determined optimization objectives and constraints of sequential production simulation.

[0090] Among them, the various types of power generation units include: conventional units and new energy units. Conventional units include: thermal power units and hydropower units, and new energy units include: wind power units and photovoltaic units.

[0091] In some embodiments, when constructing the operating output model of each of the above-mentioned power units, the relevant parameters of each power unit need to be considered. For example, when constructing the operating output model of a thermal power unit, the upper and lower limits of the output and the up and down ramp rates of the thermal power unit need to be considered. For another example, when constructing the operating output model of a hydropower unit, the forced output, expected output, and average output of the hydropower unit need to be considered.

[0092] In some embodiments, the constraint conditions include: system backup constraint, load balance constraint and important tie line transmission capacity constraint. When determining different constraint conditions, it is necessary to determine them according to different parameters. For example, the system backup constraint is determined based on the power source sequence number, the number of power sources, the backup capacity and the backup demand capacity of the acquired backup capacity. For another example, the load balance constraint is determined based on the power source sequence number, the total number of power sources, the power source capacity and the power load of the acquired power source.

[0093] In some embodiments, when determining the optimization target of the time-series production simulation, the requirements for energy structure transformation need to be considered, and the optimization target can be determined based on the power generation of new energy during the study period.

[0094] S102: Determine the output sequence of multiple types of power units based on the operating output model, optimization objectives and constraints.

[0095] Among them, the output sequence is used to characterize the output conditions of multiple types of power units at each moment.

[0096] In some embodiments, the operating output models of multiple types of power units, the predetermined optimization objectives and constraints of the timing production simulation are input into the timing simulation software (this application does not limit the specific software used, as long as it can realize timing simulation) to obtain relevant data on the output sequence of multiple types of power units in the study period.

[0097] S103. Determine the power generation capacity of the conventional units and the power generation capacity of the new energy units based on the output sequence.

[0098] In some embodiments, the output conditions of the conventional units and the output conditions of the new energy units at each moment are obtained through the output sequence. Further, the initial power generation capacity of the conventional units and the initial power generation capacity of the new energy units are determined based on the output conditions of the conventional units and the output conditions of the new energy units at each moment. Finally, the power generation capacity of the conventional units and the power generation capacity of the new energy units are determined based on the initial power generation capacity of the conventional units and the initial power generation capacity of the new energy units.

[0099] S104. Determine the power supply capacity of the regional power grid based on the power generation capacity of the conventional units and the power generation capacity of the new energy units.

[0100] It should be noted that the power supply capacity of the regional power grid (also known as the quantitative evaluation index of the power supply capacity of the regional power grid) comprehensively considers the ability of multiple types of power units to supply the peak load of the regional power grid, and the abundance of multiple types of power units compared to the average load demand of the regional power supply. Therefore, when determining the power supply capacity of the regional power grid, it is necessary not only to consider the power generation capacity of conventional units and the power generation capacity of new energy units, but also to comprehensively consider parameters such as the peak load, average load, and sum of the transmission power of the interconnection lines of the regional power grid, so that the power supply capacity of the determined regional power grid can be more accurate.

[0101] In some embodiments, conventional units include: thermal power units, hydropower units, and new energy units include: wind power units, photovoltaic units; Figure 2 As shown in FIG. 1 , the steps of constructing the operation output model of multiple types of power units include:

[0102] S201. Constructing an operating output model of the thermal power unit based on the obtained output upper and lower limits and up and down ramp rates of the thermal power unit.

[0103] Specifically, the operating output model of the thermal power unit includes the upper and lower limits of the thermal power unit's output and the limits of the up and down ramp rates, which are used to reflect the minimum technical output requirements of the heating and electrical machinery at different periods and the output obstruction of the gas power plant at high temperatures. The specific construction process is represented by the following formula:

[0104] P th,min ≤P th (t)≤P th,max

[0105] (P th (t+1)-P th (t))≤ΔP up

[0106] (P th (t)-P th (t-1))≤ΔP down

[0107] Among them, P th (t) represents the output of the operating output model of the thermal power unit, which is used to represent the output of the thermal power unit at time t in the study time, P th,min represents the lower limit of the output of the thermal power unit at the time of study (also known as the minimum technical output), P th,max represents the upper limit of the output of the thermal power unit at the time of study (also known as the maximum technical output), ΔP up represents the upward climbing rate (also called the ramp-up rate), ΔP down Indicates the downward climbing rate (also called the down-climbing rate).

[0108] S202: construct an operating output model of the hydropower unit based on the acquired forced output, expected output and average output of the hydropower unit.

[0109] Specifically, constructing the operating output model of the hydropower unit requires considering factors such as forced output, expected output and average output. The specific construction process is represented by the following formula:

[0110] P h,f ≤P h (t)≤P n,e

[0111]

[0112] Among them, P h (t) represents the output of the operating output model of the hydropower unit, which is used to represent the output of the hydropower unit at time t in the study time, P h,f represents the forced output of the hydropower unit at the time of study, P h,e represents the expected output of the hydropower unit at the time of study, T represents the total length of the study period, t srepresents the simulation time step, P h,avg Represents the average output of the hydropower unit at the time of study.

[0113] S203: constructing an operation output model of the wind turbine generator set based on the acquired rated power and wind speed information of the wind turbine generator set.

[0114] Specifically, the wind turbine operation output model includes the output power and wind speed information of the wind turbine. The wind speed information represents the wind speed at the current moment. The output power of the wind turbine is closely related to the wind speed at the current moment, such as the cut-in wind speed and the cut-out wind speed. The specific construction process is represented by the following formula:

[0115]

[0116] Among them, P wt (t) represents the output of the wind turbine operating output model, which is used to represent the output power of the wind turbine. v represents the wind speed, v ci represents the cut-in wind speed, v co Indicates the cut-out wind speed, v N Indicates rated wind speed, P wt,N Indicates the rated power of the wind turbine. It represents the theoretical output of a wind turbine when the installed capacity is constant at time t.

[0117] S204: construct an operation output model of the photovoltaic group based on the acquired rated power and light intensity of the photovoltaic group.

[0118] Specifically, the operating output model of the photovoltaic unit includes the output power of the photovoltaic unit and the light intensity. The output power of the photovoltaic unit is closely related to the light intensity at the current moment. The specific construction process is represented by the following formula:

[0119]

[0120] Among them, P pv (t) represents the output of the operating output model of the photovoltaic unit, which is used to represent the output power of the photovoltaic unit, γ represents the light intensity, P pv,N Indicates the rated power of the photovoltaic unit, γ N Indicates the rated light intensity, It represents the theoretical output of a photovoltaic unit when the installed capacity is constant at time t.

[0121] In this way, by constructing operating output models of different types of units to accurately simulate the actual output of these units under different conditions, data support is provided for the subsequent determination of the power supply capacity of the regional power grid, thereby improving the accuracy of determining the power supply capacity of the regional power grid.

[0122] In some embodiments, when determining the optimization target of the time-series production simulation, the requirements for the transformation of the energy structure need to be considered. The optimization target can be determined based on the power generation of the new energy during the study period. Specifically, the optimization target can be set to the maximum power generation of the new energy unit during the study period, that is, the maximum sum of the output of the new energy units in all time periods.

[0123] The specific determination process is represented by the following formula:

[0124]

[0125] Among them, t s It indicates the simulation time step, which can be set to 1h or other values. 8760 means the total research period is 8760h, which can also be set to other values. This application does not limit this. wf,j Indicates the jth wind farm in the regional power grid at time nt s output, J represents the number of wind farms, P pvs,k represents the kth photovoltaic station in the regional power grid at time nt s output, K represents the number of PV stations.

[0126] In some embodiments, the constraints include: system reserve constraints, load balance constraints, and important tie line transmission capacity constraints; Figure 3 As shown, the steps of determining the constraints include:

[0127] S301, determining system backup constraints based on the acquired power supply sequence number, number of power supplies, backup capacity and backup required capacity of the backup capacity.

[0128] Specifically, the system reserve constraint is characterized by the following formula:

[0129]

[0130] Among them, 8760 means that the total research period is 8760h, which can also be set to other values, m means the power source number that can bear the backup capacity (also known as the power source number of the backup capacity), M means the total number of power sources that can bear the backup capacity (also known as the number of power sources of the backup capacity), P res,m (nt s ) indicates the backup capacity power supply available at time nt s The spare capacity assumed (also called the spare capacity assumed by the spare capacity), F res (nt s ) represents the power system at time nt s The required spare capacity (also known as spare demand capacity) is the spare capacity required.

[0131] S302: Determine a load balancing constraint based on the acquired power supply sequence number, total number of power supplies, power supply capacity, and power load of the power supply.

[0132] Specifically, the load balancing constraint is characterized by the following formula:

[0133]

[0134] Among them, 8760 means that the total research period is 8760 hours, which can also be set to other values, i means the power supply number, I means the total number of power supplies, P w,i (nt s ) indicates that the power supply is at time nt s The working capacity (also called power capacity), F load (nt s ) represents the power system at time nt s load (also called electrical load).

[0135] S303: Determine the transmission capacity constraint of the important tie line based on the acquired tie line transmission power.

[0136] Specifically, the transmission capacity constraint of important tie lines is represented by the following formula:

[0137] -P line,max ≤P line (t)≤P line,max

[0138] Among them, P line (t) represents the transmission power of the tie line, -P line,max Indicates the lower limit of transmission power of important tie lines, P line,max Indicates the upper limit of transmission power of important tie lines.

[0139] In this way, by setting optimization objectives and constraints, it can be ensured that while maximizing the processing of renewable energy units, the power supply capacity of the regional power grid will not be affected, which will help determine the power supply capacity of the regional power grid when renewable energy units are connected on a large scale.

[0140] In some embodiments, Figure 4 As shown, the power generation capacity of conventional units and the power generation capacity of new energy units are determined based on the output sequence, which can be specifically implemented as follows:

[0141] S401. Obtain the output conditions of the conventional units at each moment and the output conditions of the new energy units at each moment in the output sequence.

[0142] For example, the output sequence is used to characterize the output of multiple types of power units at each moment. The output sequence can be used to obtain the output of conventional units and new energy units at each moment.

[0143] S402: determining the initial power generation capacity of the conventional units based on the output of the conventional units at each moment, and determining the initial power generation capacity of the new energy units based on the output of the new energy units at each moment.

[0144] In some embodiments, for the initial power generation capacity of a conventional unit, the average output of the conventional unit during the study period is used as its initial power generation capacity. Specifically, the initial power generation capacity of the conventional unit is determined according to the following formula:

[0145]

[0146] Among them, P con,init represents the initial power generation capacity of conventional units, P con (nt s ) represents the conventional unit at time nt s The output situation is obtained through the output sequence.

[0147] In some embodiments, the peak load rate method is used to calculate the initial power generation capacity of the new energy generator set. Specifically, the initial power generation capacity of the new energy generator set can be determined as follows:

[0148] The initial power generation capacity of the new energy unit is determined based on the output of the new energy unit at each moment and the number of simulation steps obtained in the peak load period.

[0149] The initial power generation capacity of the new energy unit is determined according to the following formula:

[0150]

[0151] Among them, P new,init Represents the initial power generation capacity of the new energy unit, P new (nt s ) indicates that the new energy unit is at time nt s The output situation is obtained through the output sequence, N h represents the total number of simulation steps during the peak load period, P new (n h t s ) represents the time nt of the new energy unit during the peak load period s The output situation is obtained through the output sequence.

[0152] S403: Determine the power generation capacity of the conventional unit based on the initial power generation capacity of the conventional unit, and determine the power generation capacity of the new energy unit based on the initial power generation capacity of the new energy unit.

[0153] In some embodiments, the power generation capacity of the conventional unit is determined based on the initial power generation capacity of the conventional unit, the pre-acquired penalty coefficient of the plant power consumption, the penalty coefficient of the maintenance, and the equivalent strong wave outage rate.

[0154] In some embodiments, the power generation capacity of the new energy unit is determined based on the initial power generation capacity of the new energy unit, the penalty coefficient of the factory power consumption, the penalty coefficient of the maintenance, and the equivalent strong wave outage rate.

[0155] For example, taking a conventional unit as an example, the power generation capacity of the conventional unit (also referred to as the final power generation capacity of the conventional unit) is determined by the following formula:

[0156] P con,uit =P con,init (1-F 1 )(1-F 2 )(1-ε)

[0157] Among them, P con,uit Indicates the power generation capacity of conventional units, P con,init Indicates the initial power generation capacity of conventional units, F 1 represents the penalty coefficient related to plant power consumption (also called the penalty coefficient of plant power consumption), F 2 represents the penalty coefficient associated with the annual planned maintenance (also known as the maintenance penalty coefficient), and ε represents the equivalent strong wave outage rate.

[0158] In some embodiments, the power generation capacity of the new energy unit is determined based on the initial power generation capacity of the new energy unit, the penalty coefficient of the factory power consumption, the penalty coefficient of the maintenance, and the equivalent strong wave outage rate.

[0159] It should be noted that the power generation capacity of the new energy unit (also referred to as the final power generation capacity of the new energy unit) is consistent with the method for determining the power generation capacity of the above-mentioned conventional unit, and this application will not elaborate on it here.

[0160] In some embodiments, Figure 5 As shown, the power supply capacity of the regional power grid is determined based on the power generation capacity of the conventional units and the power generation capacity of the new energy units, which can be specifically implemented as follows:

[0161] S501. Determine a first capacity indicator based on the power generation capacity of the conventional units, the power generation capacity of the new energy units, and the acquired peak load of the regional power grid.

[0162] Specifically, the first capacity indicator is used to characterize the peak load capacity of the regional power grid and is determined according to the following formula:

[0163]

[0164] Among them, ρ 1 Represents the first index, P con,uit Represents the sum of the power generation capacity of conventional units, ∑P new,uit Represents the sum of the power generation capacity of new energy units, P load,peak It indicates the peak load of the regional power grid. It is understandable that the sum of the power generation capacity of the conventional units can be determined according to the power generation capacity of each unit in the conventional units, and the sum of the power generation capacity of the new energy units can be determined according to the power generation capacity of each unit in the new energy units.

[0165] S502: Determine a second capacity indicator based on the power generation capacity of the conventional units, the power generation capacity of the new energy units, the acquired reserve capacity of the regional power grid, the average load, and the sum of the transmission power of the interconnection lines.

[0166] Specifically, the second indicator represents the abundance of the power generation capacity of multiple types of power units compared to the average load demand of the regional power grid after considering other factors such as the interconnection line power and standby power with the power grid outside the region, and is determined according to the following formula:

[0167]

[0168] Among them, ρ 2 Represents the second index, P con,uit Represents the sum of the power generation capacity of conventional units, ∑P new,uit Represents the sum of the power generation capacity of new energy units, P load,avg represents the average value of the regional power grid load during the study period (also known as the average load of the regional power grid), F res represents the reserve capacity of the regional power grid, P line It represents the sum of the transmission power of the tie lines. When the transmission is from outside the area to inside the area, the sum of the transmission power of the tie lines is positive, and when the transmission is from inside the area to outside the area, the sum of the transmission power of the tie lines is negative. It should be noted that the average load of the regional power grid, P load,avg It can be determined according to the following formula:

[0169]

[0170] Among them, 8760 means the total research period is 8760 hours. Indicates that the regional power grid is at time nt s The load amount.

[0171] S503: Determine the power supply capacity of the regional power grid based on the first capacity indicator and the second capacity indicator.

[0172] In some embodiments, the power supply capacity of the regional power grid is determined based on a participation factor of the contribution of the first capability indicator to the second capability indicator and the first capability indicator and the second capability indicator.

[0173] Specifically, the power supply capacity of the regional power grid is determined according to the following formula:

[0174] η=θ 1 ρ 1 +θ 2 ρ 2

[0175] Among them, η represents the power supply capacity of the regional power grid, θ 1 The participation factor representing the contribution of the first capability indicator, ρ 1 represents the first capability index, θ 2 The participation factor representing the contribution of the second capability indicator, ρ 2 represents the second capability indicator. It can be understood that θ 1 +θ 2 =1, for example, the contribution factor θ of the first capability indicator can be 1 and the participation factor θ of the contribution of the second capability indicator 2 are all set to 0.5. Alternatively, it can also be determined based on the transmission power of the interconnection line between the regional power grid and the external power grid. The participation factor θ of the transmission power of the interconnection line between the regional power grid and the external power grid and the contribution of the first capability indicator 1 There is a negative correlation with the contribution factor θ of the second capability indicator. 2 There is a positive correlation. The more power the regional power grid transmits through the interconnection line with the external power grid, the greater the contribution factor θ of the first capacity indicator. 1 The smaller the contribution of the second capability indicator, the participation factor θ 2 The bigger.

[0176] The technical solution provided in the embodiment of the present application can accurately describe the operating characteristics of different types of power supply units, such as conventional units and new energy units, through the pre-constructed operating output model of multiple types of power supplies, thereby improving the accuracy of determining the power supply capacity of the regional power grid. Furthermore, the output sequence of multiple types of power supply units is determined through the operating output model of multiple types of power supplies, the optimization objectives and constraints of the time-series production simulation, the output of different types of power supply units at each moment is characterized, and the specific power generation capacity of multiple types of power supplies is determined based on the output sequence. Taking into account the dynamic changes of different types of power supply units in different time periods and their volatility and uncertainty, the accuracy of determining the power supply capacity of the regional power grid is further improved. Finally, the power supply capacity of the regional power grid is determined by the power generation capacity of conventional units and the power generation capacity of new energy units, which can more accurately predict the power supply capacity of the power grid and improve the reliability of the power supply of the regional power grid, so as to help scientifically and rationally plan and operate the power system.

[0177] It should be noted that the information collected in this application is information and data authorized by the user or fully authorized by all parties, and the collection, storage, use, processing, transmission, provision, disclosure and application of the relevant data comply with the relevant laws, regulations and standards of the relevant countries and regions, take necessary confidentiality measures, do not violate public order and good customs, and provide corresponding operation entrances for users to choose to authorize or refuse.

[0178] It should be noted that the technical solution provided in this application provides users with corresponding operation entrances for them to choose to agree or reject the automated decision-making results; if the user chooses to reject, the expert decision-making process will be entered.

[0179] Figure 6 A device for determining the power supply capacity of a regional power grid is provided in an embodiment of the present application. The device for determining the power supply capacity of a regional power grid is used to execute the above-mentioned method for determining the power supply capacity of a regional power grid, such as Figure 6 As shown, the device for determining the power supply capacity of the regional power grid includes: an acquisition module 601, a first determination module 602, a second determination module 603 and a third determination module 604.

[0180] The acquisition module 601 is used to acquire the pre-built operation output model of multiple types of power units, the pre-determined optimization objectives and constraints of the time sequence production simulation, and the multiple types of power units include: conventional units and new energy units;

[0181] A first determination module 602 is used to determine the output sequence of multiple types of power units based on the operation output model, optimization objectives and constraints, where the output sequence is used to characterize the output conditions of the multiple types of power units at each moment;

[0182] The second determination module 603 is used to determine the power generation capacity of the conventional unit and the power generation capacity of the new energy unit based on the output sequence;

[0183] The third determination module 604 is used to determine the power supply capacity of the regional power grid based on the power generation capacity of the conventional units and the power generation capacity of the new energy units.

[0184] Furthermore, conventional units include: thermal power units, hydropower units, and new energy units include: wind power units, photovoltaic units;

[0185] The steps of constructing the operating output model of multiple types of power units include:

[0186] An operating output model of the thermal power unit is constructed based on the obtained output upper and lower limits and up and down ramp rates of the thermal power unit;

[0187] Based on the acquired forced output, expected output and average output of the hydropower unit, an operating output model of the hydropower unit is constructed;

[0188] Building an operating output model of the wind turbine generator set based on the acquired rated power and wind speed information of the wind turbine generator set;

[0189] The operating output model of the photovoltaic unit is constructed based on the obtained rated power and light intensity of the photovoltaic unit.

[0190] Furthermore, the constraints include: system reserve constraints, load balance constraints, and important tie line transmission capacity constraints;

[0191] The steps to determine constraints include:

[0192] Determine the system backup constraint based on the acquired power source sequence number, power source number, backup bearing capacity and backup required capacity of the backup power source;

[0193] Determine a load balancing constraint based on the acquired power supply sequence number, total number of power supplies, power supply capacity, and power load of the power supply;

[0194] The transmission capacity constraints of important tie lines are determined based on the acquired tie line transmission power.

[0195] Further, the second determining module 603 includes:

[0196] The output acquisition unit is used to acquire the output conditions of the conventional units and the output conditions of the new energy units at each moment in the output sequence;

[0197] An initial capacity determination unit, used to determine the initial power generation capacity of the conventional unit based on the output of the conventional unit at each moment, and to determine the initial power generation capacity of the new energy unit based on the output of the new energy unit at each moment;

[0198] The capacity determination unit determines the power generation capacity of the conventional unit based on the initial power generation capacity of the conventional unit, and determines the power generation capacity of the new energy unit based on the initial power generation capacity of the new energy unit.

[0199] Furthermore, the initial capability determination unit is specifically used for:

[0200] The initial power generation capacity of the new energy unit is determined based on the output of the new energy unit at each moment and the number of simulation steps obtained in the peak load period.

[0201] Furthermore, the capability determination unit is specifically used for:

[0202] The power generation capacity of conventional units is determined based on their initial power generation capacity, the penalty coefficient of plant power consumption obtained in advance, the penalty coefficient of maintenance, and the equivalent strong wave outage rate; and the power generation capacity of new energy units is determined based on their initial power generation capacity, the penalty coefficient of plant power consumption, the penalty coefficient of maintenance, and the equivalent strong wave outage rate.

[0203] Further, the third determining module 604 includes:

[0204] A first indicator determination unit, configured to determine a first capacity indicator based on the power generation capacity of the conventional unit, the power generation capacity of the new energy unit, and the acquired peak load of the regional power grid;

[0205] A second indicator determination unit is used to determine a second capacity indicator based on the power generation capacity of the conventional unit, the power generation capacity of the new energy unit, the acquired spare capacity of the regional power grid, the average load and the sum of the transmission power of the tie line;

[0206] The power supply capacity determination unit is used to determine the power supply capacity of the regional power grid based on the first capacity indicator and the second capacity indicator.

[0207] The technical solution provided in the embodiment of the present application can accurately describe the operating characteristics of different types of power supply units, such as conventional units and new energy units, through the pre-constructed operating output model of multiple types of power supplies, thereby improving the accuracy of determining the power supply capacity of the regional power grid. Furthermore, the output sequence of multiple types of power supply units is determined through the operating output model of multiple types of power supplies, the optimization objectives and constraints of the time-series production simulation, the output of different types of power supply units at each moment is characterized, and the specific power generation capacity of multiple types of power supplies is determined based on the output sequence. Taking into account the dynamic changes of different types of power supply units in different time periods and their volatility and uncertainty, the accuracy of determining the power supply capacity of the regional power grid is further improved. Finally, the power supply capacity of the regional power grid is determined by the power generation capacity of conventional units and the power generation capacity of new energy units, which can more accurately predict the power supply capacity of the power grid and improve the reliability of the power supply of the regional power grid, so as to help scientifically and rationally plan and operate the power system.

[0208] The systems, devices, modules or units described in the above embodiments may be implemented by computer chips or entities, or by products with certain functions. A typical implementation device is a computer device, and specifically, the computer device may be, for example, a personal computer, a laptop computer, a cellular phone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.

[0209] An embodiment of the present invention provides a computer device, including a memory and a processor, the memory is used to store information including program instructions, the processor is used to control the execution of the program instructions, and when the program instructions are loaded and executed by the processor, the steps of the embodiment of the method for determining the power supply capacity of the above-mentioned regional power grid are implemented. For a specific description, please refer to the embodiment of the method for determining the power supply capacity of the above-mentioned regional power grid.

[0210] Reference below Figure 7 , which shows a schematic diagram of the structure of a computer device 700 suitable for implementing an embodiment of the present application.

[0211] like Figure 7 As shown, the computer device 700 includes a central processing unit (CPU) 701, which can perform various appropriate operations and processes according to a program stored in a read-only memory (ROM) 702 or a program loaded from a storage part 708 into a random access memory (RAM) 703. In the RAM 703, various programs and data required for the operation of the computer device 700 are also stored. The CPU 701, the ROM 702, and the RAM 703 are connected to each other via a bus 704. An input / output (I / O) interface 705 is also connected to the bus 704.

[0212] The following components are connected to the I / O interface 705: an input section 706 including a keyboard, a mouse, etc.; an output section 707 including a cathode ray tube (CRT), a liquid crystal feedback device (LCD), etc., and a speaker, etc.; a storage section 708 including a hard disk, etc.; and a communication section 709 including a network interface card such as a LAN card, a modem, etc. The communication section 709 performs communication processing via a network such as the Internet. A drive 710 is also connected to the I / O interface 705 as needed. A removable medium 711, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 710 as needed, so that a computer program read therefrom is installed as needed as the storage section 708.

[0213] In particular, according to an embodiment of the present invention, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present invention includes a computer program product, which includes a computer program tangibly contained on a machine-readable medium, and the computer program includes program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through the communication part 709, and / or installed from the removable medium 711.

[0214] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0215] For the convenience of description, the above device is described in various units according to their functions. Of course, when implementing the present application, the functions of each unit can be implemented in the same or multiple software and / or hardware.

[0216] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0217] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0218] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0219] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0220] The acquisition, storage, use, and processing of data in the technical solution of this application comply with the relevant provisions of national laws and regulations.

[0221] It should be noted that in the embodiments of the present application, certain software, components, models and other existing solutions in the industry may be mentioned, and they should be regarded as exemplary. Their purpose is only to illustrate the feasibility of implementing the technical solution of the present application, but it does not mean that the applicant has or will necessarily use the solution.

[0222] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0223] The present application may be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. The present application may also be practiced in distributed computing environments where tasks are performed by remote processing devices connected through a communication network. In a distributed computing environment, program modules may be located in local and remote computer storage media, including storage devices.

[0224] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0225] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A method for determining the power supply capacity of a regional power grid, characterized in that: include: Obtaining pre-built operating output models of multiple types of power units, and pre-determined optimization objectives and constraints of sequential production simulation, wherein the multiple types of power units include: conventional units and new energy units; Determine an output sequence of the multi-type power supply units based on the operation output model, the optimization target and the constraint condition, wherein the output sequence is used to characterize the output conditions of the multi-type power supply units at each moment; Determine the power generation capacity of the conventional unit and the power generation capacity of the new energy unit based on the output sequence; The power supply capacity of the regional power grid is determined based on the power generation capacity of the conventional units and the power generation capacity of the new energy units.

2. The method according to claim 1, characterized in that The conventional units include: thermal power units and hydropower units, and the new energy units include: wind power units and photovoltaic units; The steps of constructing the operation output model of the multi-type power units include: An operating output model of the thermal power unit is constructed based on the obtained output upper and lower limits and up and down ramp rates of the thermal power unit; Based on the acquired forced output, expected output and average output of the hydropower unit, an operating output model of the hydropower unit is constructed; Building an operating output model of the wind turbine generator set based on the acquired rated power and wind speed information of the wind turbine generator set; The operating output model of the photovoltaic unit is constructed based on the obtained rated power and light intensity of the photovoltaic unit.

3. The method according to claim 1, characterized in that The constraints include: system reserve constraints, load balance constraints and important tie line transmission capacity constraints; The step of determining the constraint condition comprises: Determine the system backup constraint based on the acquired power source sequence number, power source number, backup bearing capacity and backup required capacity of the backup power source; Determine the load balancing constraint based on the acquired power supply sequence number, total number of power supplies, power supply capacity and power load of the power supply; The transmission capacity constraints of important tie lines are determined based on the acquired tie line transmission power.

4. The method according to claim 1, characterized in that: The determining of the power generation capacity of the conventional unit and the power generation capacity of the new energy unit based on the output sequence includes: Obtaining the output conditions of the conventional units at each moment and the output conditions of the new energy units at each moment in the output sequence; Determining the initial power generation capacity of the conventional unit based on the output of the conventional unit at each moment, and determining the initial power generation capacity of the new energy unit based on the output of the new energy unit at each moment; The power generation capacity of the conventional unit is determined based on the initial power generation capacity of the conventional unit, and the power generation capacity of the new energy unit is determined based on the initial power generation capacity of the new energy unit.

5. The method according to claim 4, characterized in that The determining of the initial power generation capacity of the conventional unit based on the output of the conventional unit at each moment, and the determining of the initial power generation capacity of the new energy unit based on the output of the new energy unit at each moment, comprises: The initial power generation capacity of the new energy generator set is determined based on the output of the new energy generator set at each moment and the number of simulation steps obtained in the peak load period.

6. The method according to claim 4, characterized in that The step of determining the power generation capacity of the conventional unit based on the initial power generation capacity of the conventional unit, and determining the power generation capacity of the new energy unit based on the initial power generation capacity of the new energy unit, comprises: The power generation capacity of the conventional unit is determined based on the initial power generation capacity of the conventional unit, the penalty coefficient of the plant power consumption obtained in advance, the penalty coefficient of maintenance, and the equivalent strong wave outage rate, and the power generation capacity of the new energy unit is determined based on the initial power generation capacity of the new energy unit, the penalty coefficient of the plant power consumption, the penalty coefficient of maintenance, and the equivalent strong wave outage rate.

7. The method according to claim 1, characterized in that The determining of the power supply capacity of the regional power grid based on the power generation capacity of the conventional unit and the power generation capacity of the new energy unit includes: Determine a first capacity indicator based on the power generation capacity of the conventional unit, the power generation capacity of the new energy unit and the acquired peak load of the regional power grid; Determine a second capacity indicator based on the power generation capacity of the conventional unit, the power generation capacity of the new energy unit, the acquired spare capacity of the regional power grid, the average load and the sum of the transmission power of the tie line; The power supply capability of the regional power grid is determined based on the first capability indicator and the second capability indicator.

8. A device for determining the power supply capacity of a regional power grid, characterized in that: include: An acquisition module is used to acquire pre-built operation output models of multiple types of power units, and pre-determined optimization objectives and constraints of sequential production simulation, wherein the multiple types of power units include conventional units and new energy units; A first determination module is used to determine the output sequence of the multi-type power supply units based on the operation output model, the optimization target and the constraint condition, wherein the output sequence is used to characterize the output of the multi-type power supply units at each moment; A second determination module is used to determine the power generation capacity of the conventional unit and the power generation capacity of the new energy unit based on the output sequence; The third determination module is used to determine the power supply capacity of the regional power grid based on the power generation capacity of the conventional unit and the power generation capacity of the new energy unit.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the steps of the method for determining the power supply capacity of the regional power grid as described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for determining the power supply capacity of a regional power grid as described in any one of claims 1 to 7 are implemented.

11. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instruction is executed by a processor, the steps of the method for determining the power supply capacity of a regional power grid as described in any one of claims 1 to 7 are implemented.

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