Regional main grid access intermittent power supply planning scheme selection and utilization rate calculation method

Abstract

The application provides a regional main grid intermittent power supply planning scheme selection and utilization rate calculation method, comprising the following steps: obtaining an annual regional main grid load curve and an annual operation mode support power start mode based on annual planning and whole network data of the regional main grid; determining power balance requirements of the regional main grid, power exchange requirements of each inter-grid section and minimum technical output curves of in-grid support power supplies; calculating an intermittent power supply abandoned power of the regional main grid under a current start mode and corresponding intermittent energy planning schemes and energy storage operation indexes; obtaining an abandoned power rate of the regional main grid intermittent power supply in different planning schemes; calculating a target function; and selecting a planning scheme with the minimum target function as an optimal planning scheme. The application solves the problem that the existing power supply utilization rate calculation method needs to perform production simulation calculation and is difficult to meet the demand of power system planning and design and consultation in the initial stage.

Description

Technical Field

[0001] This application relates to the field of power system planning and design technology, and in particular to the selection of intermittent power source planning schemes and utilization calculation methods for regional main grid access. Background Technology

[0002] With the development of new power systems and the integration of large-scale intermittent power sources, the most severely constrained areas of intermittent power sources in power systems are the regional main grids with abundant power sources. The curtailment rate of these intermittent power sources is often higher than that of the entire grid, and their utilization rate is significantly lower. Therefore, in the planning, design, and consulting process of power systems, it is necessary to evaluate the merits of power system planning schemes based on the utilization rate of intermittent power sources in the regional main grid.

[0003] Existing methods for calculating power utilization require production simulations, which involve large amounts of basic data, are difficult to collect, and are time-consuming. Furthermore, the sensitivity of this basic data makes repeated calculations prone to occur, failing to meet the needs of rapid evaluation and iterative preliminary assessment of planning schemes in the initial stages of power system planning, design, and consulting. Therefore, it is necessary to develop a planning scheme selection method for the main grid in areas with the most severe intermittent power constraints. This method would meet the needs of rapid evaluation and iterative preliminary assessment of planning schemes in the initial stages of power system planning, design, and consulting, and also provide a basis for formal production simulation calculations, reducing the workload of repeated calculations. Summary of the Invention

[0004] This application provides a method for selecting intermittent power supply planning schemes and calculating utilization rates for regional main grid access, in order to solve the problems of existing power supply utilization rate calculation methods that require production simulation calculations, have a large amount of basic data, are difficult to collect, have long calculation times, and are prone to repeated calculations due to the sensitivity of the basic data, making it difficult to meet the needs of rapid evaluation and repeated preliminary evaluation of planning schemes in the early stages of power system planning, design and consulting.

[0005] This application provides a method for selecting intermittent power supply planning schemes for regional main network access, characterized by including:

[0006] Based on the annual planning of the regional main network and the data of the entire network, the annual load curve of the regional main network and the power supply start-up mode for each annual operating mode are obtained;

[0007] The power balance requirements of the regional main grid, the power exchange requirements between different grid sections, and the minimum technical output curve of the supporting power source within the grid are determined by the overall power balance and the order of start-up methods.

[0008] Calculate the power transfer between different network sections under different intermittent energy planning schemes within the regional main grid under the current power-on mode;

[0009] Obtain intermittent power output data;

[0010] Calculate the amount of intermittent power curtailment corresponding to different intermittent energy planning schemes and energy storage operation indicators within the regional main grid under the current power-on mode;

[0011] Calculate the curtailment rate of intermittent power sources in the regional main grid under different planning schemes:

[0012] Calculate the objective function;

[0013] Change the boot method and repeat the above steps until the objective function is obtained. Select the planning scheme with the smallest objective function as the optimal planning scheme.

[0014] Optionally, the step of calculating the power transfer between different network sections in the regional main grid under the current power-on mode includes:

[0015]

[0016]

[0017]

[0018]

[0019] In the formula, S SUB (i) is the power balance requirement of the regional main grid at time i in the basic scheme. Let C be the change in power balance of the regional main network at time i for the j-th planning scheme relative to the basic scheme. m (i) is the calculated power of the network discontinuity m at time i in the basic scheme. Let be the power transfer amount at network discontinuity m at time i of the j-th planning scheme relative to the basic scheme. Let C be the power transfer rate of the inter-grid section m in the j-th planning scheme. m,lim The transmission capacity limit of the inter-network section m;

[0020] S SUB,min S SUB,max These represent the upper and lower limits of the extreme power balance demand of the regional main grid, C. m,min C m,max These represent the upper and lower limits of the transmission power at the inter-grid section m.

[0021] Optionally, the step of calculating the amount of intermittent power curtailment corresponding to different intermittent energy planning schemes and energy storage operation indicators within the regional main grid under the current power-on mode includes:

[0022]

[0023]

[0024] In the formula, Let P be the amount of power wasted by the intermittent power source of the regional main grid at time i in the j-th planning scheme. L (i) represents the load of the regional main network at time i. Let $\frac{ ... and Let n be the source-side power output and energy storage peak-shaving output of the intermittent power source n within the regional main grid at time i in the j-th planning scheme. For peak-shaving compensation output of the supporting power supply in the main grid of the region at time i in the j-th planning scheme;

[0025] Let P be the equivalent number of full charge / discharge cycles per day for the intermittent power source n in the j-th planning scheme. S,n H represents the energy storage capacity of an intermittent power source n. S,n The configuration duration for intermittent power source n energy storage. N represents the capacity ratio of intermittent power source n participating in power smoothing in the j-th planning scheme. DAY This represents the number of days to be calculated under the current power-on mode, corresponding to time i.

[0026] Optionally, the step of calculating the curtailment rate of intermittent power sources in the regional main grid under different planning schemes includes:

[0027]

[0028] Optionally, the step of calculating the objective function includes:

[0029]

[0030] In the formula, α m α is the weighting coefficient for the power imbalance at the inter-network section m. m The value is determined by the ratio of the inter-grid section power limit to the intermittent power source and energy storage capacity within the grid.

[0031] Optionally, based on the annual plan, all the above steps can be repeated to verify and revise the optimal planning scheme.

[0032] This application also provides a method for calculating the intermittent power utilization rate of regional main network access, characterized by including:

[0033] Based on the annual planning of the regional main network and the data of the entire network, the annual load curve of the regional main network and the power supply start-up mode for each annual operating mode are obtained;

[0034] The power balance requirements of the regional main grid, the power exchange requirements between different grid sections, and the minimum technical output curve of the supporting power source within the grid are determined by the overall power balance and the order of start-up methods.

[0035] Calculate the power transfer between different network sections under different intermittent energy planning schemes within the regional main grid under the current power-on mode;

[0036] Obtain intermittent power output data;

[0037] Calculate the amount of intermittent power curtailment corresponding to different intermittent energy planning schemes and energy storage operation indicators within the regional main grid under the current power-on mode;

[0038] Calculate the curtailment rate of intermittent power sources in the regional main grid under different planning schemes:

[0039] Calculate the objective function;

[0040] Change the boot method and repeat the above steps until the objective function is obtained. Select the planning scheme with the smallest objective function as the optimal planning scheme.

[0041] To obtain the optimal intermittent power supply utilization rate for the planning scheme, the steps are as follows:

[0042] λ j =1-η j ;

[0043] Based on the annual plan, repeat all the above steps to obtain the intermittent power utilization rate calculated year by year.

[0044] As can be seen from the above technical solutions, this application provides a method for selecting and calculating the utilization rate of intermittent power supply planning schemes for regional main grid access, including: obtaining the annual regional main grid load curve and the start-up mode of supporting power supplies for each annual operation mode based on the annual planning and network-wide data of the regional main grid; determining the power balance demand of the regional main grid, the power exchange demand of each network section, and the minimum technical output curve of the supporting power supply within the grid through the power balance of the entire network and the order of start-up modes; calculating the power transfer situation of each network section in different intermittent energy planning schemes within the regional main grid under the current start-up mode; obtaining intermittent power supply output data; calculating the amount of intermittent power supply curtailment corresponding to different intermittent energy planning schemes and energy storage operation indicators within the regional main grid under the current start-up mode; calculating the curtailment rate of intermittent power supply in different planning schemes of the regional main grid; calculating the objective function; changing the start-up mode and repeating the above steps until the objective function is obtained, selecting the planning scheme with the smallest objective function as the optimal planning scheme; repeating all the above steps based on the annual planning to verify and correct the optimal planning scheme.

[0045] This application addresses the problems of existing power utilization calculation methods, which require production simulation calculations, involve large amounts of basic data, are difficult to collect, have long calculation times, and are prone to repeated calculations due to the sensitivity of the basic data. These methods fail to meet the needs of rapid evaluation and repeated preliminary assessment of planning schemes in the early stages of power system planning, design, and consulting. This application satisfies the needs of rapid evaluation and repeated preliminary assessment of planning schemes in the early stages of power system planning, design, and consulting, and also provides a basis for formal production simulation calculations, reducing the workload of repeated calculations. Attached Figure Description

[0046] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 A flowchart illustrating the method for calculating the intermittent power supply utilization rate of the regional main network access provided in this application;

[0048] Figure 2 A schematic diagram of the power grid structure for the method of selecting intermittent power supply planning schemes for regional main grid access provided in this application. Detailed Implementation

[0049] The 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 numbers in different drawings represent the same or similar elements. The embodiments described below do not represent all embodiments consistent with this application. They are merely examples of systems and methods consistent with some aspects of this application as detailed in the claims.

[0050] See Figure 1 The flowchart of the method for calculating the intermittent power utilization rate of the regional main network access provided in this application is shown below, including:

[0051] Based on the annual planning of the regional main network and the data of the entire network, the annual load curve of the regional main network and the power supply start-up mode for each annual operating mode are obtained;

[0052] In one embodiment, the voltage level of the regional main grid is not lower than 110 kV.

[0053] The power balance requirements of the regional main grid, the power exchange requirements between different grid sections, and the minimum technical output curve of the supporting power source within the grid are determined by the overall power balance and the order of start-up methods.

[0054] In one embodiment, the supporting power sources within the regional main power grid include coal-fired power, hydropower, and nuclear power.

[0055] Calculate the power transfer between different network sections under different intermittent energy planning schemes within the regional main grid under the current power-on mode;

[0056] In one embodiment, the inter-network section can be an input section, an output section, or a swing section; it can be a section composed of multiple voltage levels and different voltage levels; it can be a section composed of a single circuit or multiple circuits.

[0057] Obtain intermittent power output data;

[0058] In one embodiment, the intermittent power source includes wind power, photovoltaic power, wind power with energy storage, photovoltaic power with energy storage, integrated wind-solar-energy storage projects, integrated wind-solar-thermal-energy storage projects, integrated wind-solar-hydro-energy storage projects, integrated wind-solar-hydro-thermal-energy storage projects, integrated biomass power generation and energy storage projects, peak-shaving gas power plants, shared energy storage, and grid-type energy storage.

[0059] Calculate the amount of intermittent power curtailment corresponding to different intermittent energy planning schemes and energy storage operation indicators within the regional main grid under the current power-on mode;

[0060] Calculate the curtailment rate of intermittent power sources in the regional main grid under different planning schemes:

[0061] Calculate the objective function;

[0062] Change the boot method and repeat the above steps until the objective function is obtained. Select the planning scheme with the smallest objective function as the optimal planning scheme.

[0063] In one embodiment, this application provides a schematic diagram of the power grid structure for a method of selecting a regional main grid access intermittent power supply planning scheme. The regional main grid SUB is as follows: Figure 2 As shown. The voltage level of the regional main grid is not lower than 110 kV. In this embodiment, the voltage level of the regional main grid is 330 kV or 500 kV.

[0064] Among them, the inter-network section can be an input section, an output section, or a swing section; it can be a section with multiple voltage levels or a combination of different voltage levels; it can be a section composed of a single circuit or multiple circuits. For example... Figure 2 As shown, in this embodiment, C1 is the input section, C2 is the output section, and C3 is the swing section, which is a single-circuit or multi-circuit section of the same voltage level.

[0065] Intermittent power sources include wind power, photovoltaic power, wind power with energy storage, photovoltaic power with energy storage, integrated wind-solar-energy storage projects, integrated wind-solar-thermal-energy storage projects, integrated wind-solar-hydro-energy storage projects, integrated wind-solar-hydro-thermal-energy storage projects, integrated biomass power generation and energy storage projects, peak-shaving gas power plants, shared energy storage, and grid-connected energy storage. This embodiment does not distinguish between different types of intermittent power sources. S1 to S6 are intermittent power plant stations based on the basic scheme, and S7 to S12 are intermittent power plant stations based on the planning scheme for a specific planning year.

[0066] First, based on the annual plan and network-wide data, obtain the annual load curve P of the regional main network. L (i) and the power supply start-up method for each operating mode in the year.

[0067] The next step is to determine the power balance demand curve S of the regional main grid according to the overall grid power balance and the order of start-up. SUB (i) Power exchange demand curves C1(i), C2(i), C3(i) of inter-grid sections C1, C2, and C3, and minimum technical output curve P of the supporting power source within the grid. MO (i).

[0068] The obtained load curves, power balance demand curves, power exchange demand curves between grid sections, and minimum technical output curves of supporting power sources within the grid provide the basic data for subsequent planning scheme selection.

[0069] This embodiment illustrates the composition of a minimum technical output curve, consisting of thermal power and hydropower, as follows:

[0070]

[0071] In the formula, P MO (i) is the curve of the total minimum output of the supporting power sources within the regional main grid. Let be the minimum technical output rate of coal-fired power plant t in the regional main grid under the j-th start-up mode. Let h be the base load output rate of the regional main grid hydropower station under the j-th start-up mode.

[0072] The next step is to calculate the regional main network under the current boot method. Figure 2 In the intermittent energy planning schemes S7 to S12 shown, the power transfer at inter-grid sections C1, C2, and C3 is as follows:

[0073] S SUB (i) = C1(i) ​​+ C2(i) + C3(i)

[0074] S SUB (i)+ΔS SUB (i)=C1(i)+ΔC1(i)+C2(i)+ΔC2(i)+C3(i)+ΔC3(i)

[0075] And satisfy:

[0076] S SUB,min ≤S SUB (i)+ΔS SUB (i)≤S SUB,max

[0077] C 1,min≤C1(i)+ΔC1(i)≤C 1,max

[0078] C 2,min ≤C2(i)+ΔC2(i)≤C 2,max

[0079] C 3,min ≤C3(i)+ΔC3(i)≤C 3,max

[0080] In the formula, ΔS SUB (i) represents the power balance change of the regional main grid at time i in the intermittent energy S7-S12 planning scheme, and ΔC1(i), ΔC2(i), and ΔC3(i) represent the power transfer at inter-grid sections C1, C2, and C3 at time i in the intermittent energy S7-S12 planning scheme. The upper and lower limits C of the transmission power at inter-grid sections C1, C2, and C3 are... 1,max C 1,min C 2,max C 2,min C 2,max C 3,min The upper and lower limits of inter-grid section power demand and the limit of section transmission capacity are jointly determined, as follows:

[0081]

[0082]

[0083]

[0084]

[0085]

[0086]

[0087] In the formula, C 1,lim C 2,lim C 3,lim For the transmission capacity limits of cross sections C1, C2, and C3 between the grids, C 1,req-out C 2,req-out C 3,req-out For the maximum outbound demand of network sections C1, C2, and C3, C 1,req-in C 2,req-in C 3,req-in The limit of internal transmission demand for network sections C1, C2, and C3.

[0088] The power transfer rates μ1, μ2, and μ3 at grid sections C1, C2, and C3 in the intermittent energy planning scheme S7–S12 are calculated as follows:

[0089]

[0090]

[0091]

[0092] The next step is to acquire the output data P of the intermittent power supply S1 to S12. NE,n (i) Calculate the curtailment rate of intermittent power sources S1 to S12 within the regional main grid in the S7 to S12 planning schemes, satisfying the following power balance constraints:

[0093]

[0094] In the formula, P AB (i) represents the amount of power abandoned by the intermittent power sources of the regional main grid at time i in the S7~S12 planning scheme; S SUB (i)+ΔS SUB (i), P L (i) and P MO (i) Obtained in the preceding steps respectively; P NE,n (i) and P S,n (i) represents the source-side output and energy storage peak-shaving output of intermittent power source n within the regional main grid at time i in the S7~S12 planning scheme, where n is taken as 1~12; P PR 9i) is the peak-shaving compensation output of the supporting power source within the regional main grid at time i in the S7~S12 planning scheme.

[0095] In addition, the charging and discharging quantities of the energy storage devices of intermittent power sources S1 to S12 all satisfy the following energy balance constraints:

[0096]

[0097] In the formula, n S,n P represents the equivalent number of full charge / discharge cycles per day for intermittent power source n energy storage in the S7-S12 planning schemes. S,n H represents the energy storage capacity of an intermittent power source n. S,n The configuration duration of energy storage for intermittent power source n, ξ S,n For the S7~S12 planning schemes, N represents the capacity ratio of intermittent power source n that participates in smoothing power output. DAY This represents the number of days to be calculated under the current power-on mode, corresponding to time i. n ranges from 1 to 12.

[0098] If the intermittent power sources in the planning scheme are conventional wind and solar power without energy storage, then the following power balance constraints are met:

[0099]

[0100] Next, the curtailment rate of intermittent power sources in the regional main grid under the S7-S12 planning schemes is calculated as follows:

[0101]

[0102] Next, calculate the following objective function:

[0103] (α1|μ1|+α2|μ2|+α3|μ3|)+η

[0104] In the formula, α1, α2, and α3 are the weighting coefficients of the power transfer rates of inter-grid sections C1, C2, and C3. Their values ​​are determined by the ratio of the inter-grid section power limit to the intermittent power sources and energy storage capacity within the grid. This example provides one determination principle: if the ratio of the intermittent power sources and energy storage capacity within the grid to the inter-grid section power limit is less than 1, then take 1; otherwise, determine it by the following formula, taking α1 as an example:

[0105]

[0106] Convert the power transfer rate to the power transfer ratio.

[0107] Next, calculate the division Figure 2 For other alternative planning schemes besides those shown, calculate the objective function of each scheme using the same steps as in the example above. Select the scheme with the smallest objective function as the recommended scheme, and calculate the utilization rate λ of intermittent power sources S1 to S12 as follows:

[0108] λ = 1 - η

[0109] The next step is to repeat the above steps year by year based on the annual plan, verify and revise the recommended scheme that minimizes the objective function in the first step, and calculate the utilization rate of intermittent power sources year by year.

[0110] The method for selecting and calculating the utilization rate of intermittent power supply planning schemes for regional main grid access provided in this application includes: obtaining the annual regional main grid load curve and the start-up mode of supporting power supplies for each annual operation mode based on the annual planning and network-wide data of the regional main grid; determining the power balance demand of the regional main grid, the power exchange demand between different grid sections, and the minimum technical output curve of the supporting power supply within the grid through the power balance of the entire grid and the order of start-up modes; calculating the power transfer situation between different grid sections in different intermittent energy planning schemes within the regional main grid under the current start-up mode; obtaining intermittent power supply output data; calculating the amount of intermittent power supply curtailment corresponding to different intermittent energy planning schemes and energy storage operation indicators within the regional main grid under the current start-up mode; calculating the curtailment rate of intermittent power supply in different planning schemes of the regional main grid; calculating the objective function; changing the start-up mode and repeating the above steps until the objective function is obtained, selecting the planning scheme with the smallest objective function as the optimal planning scheme; and repeating all the above steps based on the annual planning to verify and revise the optimal planning scheme.

[0111] The method for selecting and calculating the utilization rate of intermittent power supply planning schemes for regional main grid access provided in this application solves the problems of existing power supply utilization rate calculation methods, which require production simulation calculations. These methods involve large amounts of basic data, are difficult to collect, and have long calculation times. Furthermore, they are prone to repeated calculations due to the sensitivity of the basic data, making it difficult to meet the needs of rapid evaluation and repeated preliminary evaluation of planning schemes in the early stages of power system planning, design, and consulting. This method meets the needs of rapid evaluation and repeated preliminary evaluation of planning schemes in the early stages of power system planning, design, and consulting, and also provides a basis for formal production simulation calculations, reducing the workload of repeated calculations.

[0112] The foregoing has shown and described the basic principles and main features of this application, as well as its advantages. It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from its spirit or basic characteristics. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this application is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this application.

Claims

1. A method for selecting intermittent power supply planning schemes for regional main grid access, characterized in that, include: Based on the annual planning data of the regional main network and the data of the entire network, we obtain the annual regional main network load curve, the annual regional main network basic scheme data, and the power supply start-up mode for each operating mode. The power balance requirements of the regional main grid, the power exchange requirements of the inter-grid sections, and the minimum technical output curves of the supporting power sources within the grid are determined by the sequence of power balance and start-up methods of the entire grid. The steps for calculating the power transfer between different intermittent energy planning schemes within the regional main grid under the current power-on mode include: In the formula, The first in the basic scheme i Power balance requirements of the main network in the time zone For the first j The first planning scheme is relative to the basic scheme. i The change in power balance of the regional main grid at any given time. The first in the basic scheme i Time-space cross section m Calculated power, For the first j The first planning scheme is relative to the basic scheme. i Time-space cross section m The amount of power transferred, For the first j Network section in various planning schemes m power transfer rate, For the intersection of the network m The limit of the transmission capacity, This represents the total number of computation time slots under the current boot mode. These represent the upper and lower limits of the power balance requirements for the regional main grid under extreme conditions. Intersection of the network m The upper and lower limits of the transmission power; Obtain intermittent power output data; The steps for calculating the amount of intermittent power curtailment corresponding to different intermittent energy planning schemes and energy storage operation indicators within the regional main grid under the current power-on mode include: The charging and discharging quantities of the energy storage device for intermittent power sources both satisfy the following energy balance constraints: In the formula, For the first j The first of the planning schemes i The amount of power abandoned by intermittent power sources in the main grid at any given time. For the first i The load of the regional main network at any given time. For the first j The first of the planning schemes i The total minimum output of the supporting power supply within the main network of the time region. and For the first j The first of the planning schemes i Intermittent power supply within the main network of the time zone n Source-side power output and energy storage peak-shaving power output, For the first j The first of the planning schemes i Peak-shaving compensation output of the supporting power supply within the main grid of the time zone; For the first j The planning scheme includes intermittent power storage. n The equivalent number of full charge / discharge cycles per day for energy storage. Intermittent power supply with storage n Energy storage capacity, Intermittent power supply with storage n The configuration time for energy storage For the first j The planning scheme includes intermittent power storage. n Energy storage participates in smoothing the output capacity ratio. The number of days to be calculated under the current power-on mode, and the time. i correspond; The steps for calculating the curtailment rate of intermittent power sources in the regional main grid under different planning schemes include: ； The steps to calculate the objective function include: In the formula, For the intersection of the network m Weighting coefficients for power transfer rate, The value of is determined by the ratio of the inter-grid section power limit to the intermittent power source and energy storage capacity within the grid; Change the boot method and repeat the above steps until the objective function is obtained. Select the planning scheme with the smallest objective function as the optimal planning scheme.

2. The method for selecting intermittent power supply planning schemes for regional main network access according to claim 1, characterized in that, The steps for selecting the optimal planning scheme as the one that minimizes the objective function include: Based on the annual plan, repeat all the above steps to verify and revise the optimal planning scheme.

3. A method for calculating the utilization rate of intermittent power supplies connected to a regional main grid, characterized in that, include: Based on the annual planning of the regional main network and the data of the entire network, the annual load curve of the regional main network and the power supply start-up mode for each annual operating mode are obtained; The power balance requirements of the regional main grid, the power exchange requirements between different grid sections, and the minimum technical output curve of the supporting power source within the grid are determined by the overall power balance and the order of start-up methods. The steps for calculating the power transfer between different intermittent energy planning schemes within the regional main grid under the current power-on mode include: In the formula, The first in the basic scheme i Power balance requirements of the main network in the time zone For the first j The first planning scheme is relative to the basic scheme. i The change in power balance of the regional main grid at any given time. The first in the basic scheme i Time-space cross section m Calculated power, For the first j The first planning scheme is relative to the basic scheme. i Time-space cross section m The amount of power transferred, For the first j Network section in various planning schemes m power transfer rate, For the intersection of the network m The limit of the transmission capacity, This represents the total number of computation time slots under the current boot mode. These represent the upper and lower limits of the power balance requirements for the regional main grid under extreme conditions. Intersection of the network m The upper and lower limits of the transmission power; Obtain intermittent power output data; The steps for calculating the amount of intermittent power curtailment corresponding to different intermittent energy planning schemes and energy storage operation indicators within the regional main grid under the current power-on mode include: The charging and discharging quantities of the energy storage device for intermittent power sources both satisfy the following energy balance constraints: In the formula, For the first j The first of the planning schemes i The amount of power abandoned by intermittent power sources in the main grid at any given time. For the first i The load of the regional main network at any given time. For the first j The first of the planning schemes i The total minimum output of the supporting power supply within the main network of the time region. and For the first j The first of the planning schemes i Intermittent power supply within the main network of the time zone n Source-side power output and energy storage peak-shaving power output, For the first j The first of the planning schemes i Peak-shaving compensation output of the supporting power supply within the main grid of the time zone; For the first j The planning scheme includes intermittent power storage. n The equivalent number of full charge / discharge cycles per day for energy storage. Intermittent power supply with storage n Energy storage capacity, Intermittent power supply with storage n The configuration time for energy storage For the first j The planning scheme includes intermittent power storage. n Energy storage participates in smoothing the output capacity ratio. The number of days to be calculated under the current power-on mode, and the time. i correspond; The steps for calculating the curtailment rate of intermittent power sources in the regional main grid under different planning schemes include: The steps to calculate the objective function include: In the formula, For the intersection of the network m Weighting coefficients for power transfer rate, The value of is determined by the ratio of the inter-grid section power limit to the intermittent power source and energy storage capacity within the grid; Change the boot method and repeat the above steps until the objective function is obtained. Select the planning scheme with the smallest objective function as the optimal planning scheme. To obtain the optimal intermittent power supply utilization rate for the planning scheme, the steps are as follows: Based on the annual plan, repeat all the above steps to obtain the intermittent power utilization rate calculated year by year.

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