Inter-region and intra-region reliable power generation capacity coordination clearing and settlement method

Abstract

The invention discloses an inter-region and intra-region reliable power generation capacity coordinated clearing and settlement method, which comprises the following steps: carrying out optimized clearing on power generation capacity demand side and supply side information of each region to obtain a pre-clearing result in each region; analyzing the pre-clearing result to obtain a power generation capacity adequacy condition of each region and inter-region reliability power generation capacity information of each region; in combination with the information and ATC constraints, multi-channel centralized optimization clearing is carried out on the reliability power generation capacity between the regions, and a clearing result between the regions and a guarantee settlement result are obtained; performing final optimization clearing on the reliable power generation capacity in each region by taking the clearing result as a boundary to obtain a final clearing result and a guarantee settlement result in each region; and on the basis of the results, combining execution information and reference information of each region, determining a return price difference result and a power generation capacity insufficiency punishment result of all power generation capacity supply subjects, and obtaining inter-region and intra-region reliable power generation capacity settlement results.

Description

Technical Field

[0001] The present invention relates to the field of electric power technology for ensuring the adequacy of power generation capacity, and in particular to a method and system for coordinated clearing and settlement of reliable power generation capacity between regions and within regions. Background Art

[0002] With the significant changes in the current power source structure, the issue of power generation capacity adequacy has received increasing attention. The solutions to this problem are mainly divided into the scarcity method and the capacity method according to the revenue composition at home and abroad, and the capacity method is currently adopted in China. The scarcity method makes it possible to directly reflect the actual situation of power generation capacity supply and demand by utilizing the characteristic of removing the upper limit of the electricity energy value. However, the fluctuation of the electricity energy value is relatively obvious, so the requirements for the relevant entities participating in the power generation capacity configuration are relatively high. The capacity method refers to directly compensating for the cost of power generation capacity. This compensation incorporates too many subjective human factors, resulting in the compensation being often too large or too small and unable to accurately reflect the actual situation of power generation capacity supply and demand.

[0003] Based on systems theory, the linkage relationship of power generation capacity adequacy between regions and within regions of the power system is constructed, integrating the advantages of the scarcity method that can more accurately reflect the supply and demand situation of power generation capacity adequacy and the advantage of the capacity method that has a stable electricity energy value, and designing a method for coordinated clearing and settlement of reliable power generation capacity between regions and within regions to solve the problems of the distortion of the capacity value to the electricity energy value, the low participation willingness of power generation capacity entities, and the improper power generation capacity configuration caused by excessive human intervention, and to improve the effect of optimal power generation capacity configuration and ensure the adequacy of power generation capacity of the power system. Summary of the Invention

[0004] The first object of the present invention is to overcome the disadvantages and deficiencies of the prior art and provide a method for coordinated clearing and settlement of reliable power generation capacity between regions and within regions, which can effectively improve the effect of optimal power generation capacity configuration and ensure the adequacy of power generation capacity of the power system.

[0005] The second object of the present invention is to provide a system for coordinated clearing and settlement of reliable power generation capacity between regions and within regions.

[0006] The first object of the present invention is achieved by the following technical solutions: A method for coordinated clearing and settlement of reliable power generation capacity between regions and within regions includes:

[0007] A1: Optimize and clear the demand-side information of the power generation capacity demand entities in each region and the supply-side information of the power generation capacity supply entities to obtain the preliminary clearing results of reliable power generation capacity within each region;

[0008] A2: Analyze the pre-clearing results of the reliable power generation capacity in each region to obtain the adequacy of power generation capacity in each region, and then determine the inter-regional reliable power generation capacity information for each region according to the adequacy of power generation capacity in each region;

[0009] A3: Combine the inter-regional reliable power generation capacity information of each region and the ATC constraints of each inter-regional transmission channel to perform multi-channel centralized optimization clearing on the inter-regional reliable power generation capacity, and obtain the inter-regional reliable power generation capacity clearing result and the inter-regional reliable power generation capacity guarantee settlement result;

[0010] A4: Take the inter-regional reliable power generation capacity clearing result as the boundary to perform final optimization clearing on the reliable power generation capacity within each region, and obtain the final clearing result of the reliable power generation capacity within each region and the reliable power generation capacity guarantee settlement result within each region;

[0011] A5: Combine the inter-regional reliable power generation capacity clearing result, the final clearing result of the reliable power generation capacity within each region, the execution information and reference information of the reliable power generation capacity of each region to determine the refund difference result of all power generation capacity supply entities, and determine the power generation capacity shortage penalty result according to the actual power generation capacity supply situation of all power generation capacity supply entities, so as to obtain the inter-regional and intra-regional reliable power generation capacity settlement results.

[0012] Furthermore, the specific operation steps of step A1 are as follows:

[0013] A11: Based on the power generation capacity demand information of the power generation capacity demand entities in each region, construct a four-point reliable power generation capacity demand model for each region that includes a starting point, a minimum value point, an expected point, and a maximum value point, and form the demand-side information of the power generation capacity demand entities in each region. The four-point reliable power generation capacity demand model that includes a starting point, a minimum value point, an expected point, and a maximum value point is:

[0014] f(x) = {f1(x), x ∈ [0, z min ; f2(x), x ∈ (z min , z expect , z expect , z max}

[0015] f1(x) = h VOLL

[0016]

[0017]

[0018] Where: f(x) is the four-point reliability power generation capacity demand function in the region, x is the independent variable of f(x), f1(x), f2(x), and f3(x) are the three piecewise functions of f(x), with the starting point taken as x = 0, z min 、z expect 、z max are respectively the minimum reliability power generation capacity demand in the region corresponding to the minimum point, the expected reliability power generation capacity demand in the region corresponding to the expected point, and the maximum reliability power generation capacity demand in the region corresponding to the maximum point, h VOLL 、h expect are respectively the load loss index in the region and the expected power generation capacity index in the region;

[0019] A12: Based on the power generation capacity supply information of the power generation capacity supply entities in each region, construct a stepped reliability power generation capacity supply model for each region to form the supply-side information of the power generation capacity supply entities in each region. The stepped reliability power generation capacity supply model is:

[0020]

[0021] g1(t) ≤ g2(t) ≤... ≤ g n (t)

[0022] Where: g(t) is the stepped reliability power generation capacity supply function in the region, t is the independent variable of g(t), g1(t), g2(t),..., g n (t) are the n piecewise functions of g(t), representing the indices of n power generation capacity supply entities in the region. q1 is the power generation capacity of the first power generation capacity supply entity in the region, q u is the power generation capacity of the u-th power generation capacity supply entity in the region, and u is the traversal subscript of the power generation capacity supply entities in the region;

[0023] A13: Optimize and clear the demand-side information of the power generation capacity demand entities and the supply-side information of the power generation capacity supply entities in each region. Among them, the same mathematical model is used in each region, with the maximization of the comprehensive index of the reliability power generation capacity in the region as the objective function, and there are constraints on the capacity of the reliability power generation capacity supply entities in the region and the total effective amount constraint, to obtain the pre-clearing results of the reliability power generation capacity in each region. The mathematical model of the optimization clearing is:

[0024] Objective function:

[0025] Constraints on the capacity of the reliability power generation capacity supply entities in the region:

[0026] Total effective amount constraint: Let S1(y) = f(x) - g(t) and S1(y *) = 0 0 < y ≤ y *

[0027] Where: max represents maximization, and the measurement scales and units of the abscissa and ordinate of f(x), g(t), and S1(y) are exactly the same. represents the integral of f(x) from 0 to y. represents the integral of g(t) from 0 to y. represents the comprehensive standard value of reliable power generation capacity in the region, q bid-in,u is the pre-cleared power generation capacity of the u-th power generation capacity supply entity in the region, S1(y) is the surplus function of the comprehensive standard value of reliable power generation capacity in the region, y is the independent variable of S1(y), and y * is the total pre-effective amount of reliable power generation capacity in the region;

[0028] From the above optimized clearing mathematical model, the pre-clearing results of reliable power generation capacity in each region can be obtained: including the pre-clearing situation sequence b of the reliable power generation capacity entities in the region and the total pre-effective amount y of reliable power generation capacity in the region * , where:

[0029] b = {q bid-in,1 , q bid-in,2 ,......, q bid-in,n}

[0030] In the formula, the sequence b records the pre-clearing situation of the reliable power generation capacity supply entities in the region, and q bid-in,1 is the pre-cleared power generation capacity of the 1st power generation capacity supply entity in the region, and q bid-in,2 is the pre-cleared power generation capacity of the 2nd power generation capacity supply entity in the region, and q bid-in,n is the pre-cleared power generation capacity of the n-th power generation capacity supply entity in the region.

[0031] Furthermore, the specific operation steps of step A2 are as follows:

[0032] A21: Analyze the pre-clearing results of reliable power generation capacity in each region to obtain the power generation capacity adequacy situation in each region. If the analysis result is y * > z expect it means that the power generation capacity in the region is abundant, otherwise the power generation capacity in the region is tight;

[0033] A22: Determine the supply and demand situations of each region in the inter-regional reliable generation capacity according to the adequacy of the generation capacity in each region. If the generation capacity in a region is tight, then this region serves as the demand region for the inter-regional reliable generation capacity and obtains the information on the demand side of the inter-regional reliable generation capacity. If the generation capacity in a region is abundant, then this region serves as the supply region for the inter-regional reliable generation capacity and obtains the information on the supply side of the inter-regional reliable generation capacity. Finally, obtain the information on the inter-regional reliable generation capacity for each region.

[0034] Further, the specific operation steps of step A3 are as follows:

[0035] A31: Determine the supply region and demand region of each transmission channel according to the connection relationship, and then use the information on the demand side of the inter-regional reliable generation capacity related to the inter-regional transmission channel i to construct a stepped inter-regional reliable generation capacity demand model. The stepped inter-regional reliable generation capacity demand model is:

[0036]

[0037]

[0038] In the formula: e i (r i ) is the inter-regional reliable generation capacity demand function of the inter-regional transmission channel i, i is the superscript for traversing the inter-regional transmission channels, r i is the independent variable of e i (r i ), is the o piecewise functions of e i (r i ), representing the o demand region values of the inter-regional transmission channel i, r1 i is the generation capacity of the first demand region of the inter-regional transmission channel i, is the generation capacity of the pth demand region of the inter-regional transmission channel i, p is the subscript for traversing the demand regions;

[0039] A32: Use the information on the supply side of the inter-regional reliable generation capacity related to the inter-regional transmission channel i to construct a stepped inter-regional reliable generation capacity supply model. The stepped inter-regional reliable generation capacity supply model is:

[0040]

[0041]

[0042] In the formula: d i (w i ) is the inter-regional reliable generation capacity supply function of the inter-regional transmission channel i, w i is for di (w i )'s independent variable, is d i (w i )'s j piecewise functions, representing the j supply area scalar values of the inter-regional power transmission channel i, represents the power generation capacity of the first supply area of the inter-regional power transmission channel i, represents the power generation capacity of the m-th supply area of the inter-regional power transmission channel i, where m is the supply area traversal subscript;

[0043] A33: Combining the inter-regional reliability power generation capacity information of each region and the ATC constraints of each inter-regional power transmission channel, perform multi-channel centralized optimization clearing on the inter-regional reliability power generation capacity. Taking the maximization of the inter-regional reliability power generation capacity comprehensive scalar value as the objective function, there are inter-regional reliability power generation capacity demand and supply clearing capacity constraints, effective total amount constraints, and ATC constraints of the inter-regional power transmission channel i, and obtain the inter-regional reliability power generation capacity clearing result. The mathematical model of the optimization clearing is as follows:

[0044] Objective function:

[0045] Inter-regional reliability power generation capacity demand clearing capacity constraint:

[0046] Inter-regional reliability power generation capacity supply clearing capacity constraint:

[0047] Effective total amount constraint: Let and

[0048] ATC constraint of the inter-regional power transmission channel i:

[0049] In the formula: max represents maximization, e i (r i ), d i (w i ) and The measurement scales and units of the horizontal and vertical coordinates are exactly the same, is the integral of the e i (r i ) function corresponding to the inter-regional power transmission channel i from 0 to a i , is the integral of the d i (w i ) function corresponding to the inter-regional power transmission channel i from 0 to a i , represents the inter-regional reliability power generation capacity comprehensive scalar value of the inter-regional power transmission channel i, Denote the cleared generation capacity of the p-th demand area of the inter-regional transmission channel i. Denote the cleared generation capacity of the m-th supply area of the inter-regional transmission channel i. is the comprehensive standard value surplus function of the inter-regional reliable generation capacity, a i is the independent variable of Denote the total effective amount of the inter-regional reliable generation capacity of the inter-regional transmission channel i, ATC i Denote the available transfer capacity of the inter-regional transmission channel i;

[0050] From the above optimized clearing mathematical model, the clearing results of the inter-regional reliable generation capacity can be obtained: including the sequence c of the clearing situation of the inter-regional reliable generation capacity of the inter-regional transmission channel i i and the total effective amount of the inter-regional reliable generation capacity Among them:

[0051]

[0052] In the formula: sequence c i records the clearing situation of the inter-regional reliable generation capacity of the inter-regional transmission channel i, is the cleared generation capacity of the 1st demand area of the inter-regional transmission channel i, is the cleared generation capacity of the 2nd demand area of the inter-regional transmission channel i, is the cleared generation capacity of the o-th demand area of the inter-regional transmission channel i, is the cleared generation capacity of the 1st supply area of the inter-regional transmission channel i, is the cleared generation capacity of the 2nd supply area of the inter-regional transmission channel i, is the cleared generation capacity of the j-th supply area of the inter-regional transmission channel i;

[0053] A34: Calculate the marginal standard value of the supply area of the inter-regional reliable generation capacity of the inter-regional transmission channel i according to the marginal pricing method, as shown in the following formula:

[0054]

[0055] In the formula: is the marginal standard value of the supply area of the inter-regional reliable generation capacity of the inter-regional transmission channel i, are respectively the standard values of the demand area and the supply area where the inter-regional reliable generation capacity of the inter-regional transmission channel i finally takes effect, and K1 is the inter-regional price difference coefficient;

[0056] If K1 = 0, the marginal value of the reliability power generation capacity supply area between regions is the last effective supply area value; if K1 = 1, the marginal value of the reliability power generation capacity supply area between regions is the last effective demand area value; if K1 = 0.5, the marginal value of the reliability power generation capacity supply area between regions is the arithmetic mean of the last effective demand area value and the supply area value.

[0057] The reliability power generation capacity guarantee settlement result between regions is obtained by multiplying the marginal value of the reliability power generation capacity supply area between regions of the inter-regional transmission channel i by the cleared power generation capacity of the demand area or the cleared power generation capacity of the supply area, as shown in the following formula:

[0058]

[0059] In the formula: sequence l i records the reliability power generation capacity guarantee settlement result of the inter-regional transmission channel i in the reliability power generation capacity between regions.

[0060] Furthermore, the specific operation steps of step A4 are as follows:

[0061] A41: Finally optimize and clear the reliability power generation capacity within each region with the cleared result of the reliability power generation capacity between regions as the boundary. The mathematical model of the final optimization and clearing is:

[0062] Objective function:

[0063] Among them,

[0064]

[0065] g1(t) ≤ g2(t) ≤.... ≤ g n (t)

[0066] Constraint on the cleared capacity of the reliability power generation capacity supply entity within the region:

[0067] Effective total amount constraint: Let S3(y new ) = f(x) - g new (t) and S3(y new* ) = 0 0 < y new ≤ y new*

[0068] In the formula: max represents maximization. The measurement scales and units of the horizontal and vertical coordinates of f(x), g new (t) and S3(y new ) are exactly the same, is the integral of the f(x) function from 0 to y new and, is g new The integral of the function (t) from 0 to y new , represents the comprehensive standard value of the reliable power generation capacity in the updated area, g new (t) is the supply function of the reliable power generation capacity in the updated area, and t is the independent variable of both g(t) and g new (t). Δq1 is the inter-regional reliable power generation capacity cleared by the first power generation capacity supply entity, and Δq u is the inter-regional reliable power generation capacity cleared by the u-th power generation capacity supply entity, is the final cleared power generation capacity of the u-th power generation capacity supply entity, and S3(y new ) is the surplus function of the comprehensive standard value of the reliable power generation capacity in the area updated with the clearing result of the inter-regional reliable power generation capacity as the boundary, y new is for S3(y new ), and y new* represents the final effective total amount of the reliable power generation capacity in the area;

[0069] From the above-mentioned finally optimized clearing mathematical model, the final clearing results of the reliable power generation capacity in each area can be obtained: including the final clearing result sequence b of the reliable power generation capacity supply entities in the area new and the final effective total amount y of the reliable power generation capacity in the area new* , where:

[0070]

[0071] In the formula: the sequence b new records the final clearing results of the reliable power generation capacity supply entities in the area, is the final cleared power generation capacity of the first power generation capacity supply entity, is the final cleared power generation capacity of the second power generation capacity supply entity, is the final cleared power generation capacity of the n-th power generation capacity supply entity;

[0072] A42: Calculate the marginal standard value of the reliable power generation capacity in the area according to the marginal pricing method, as shown in the following formula:

[0073]

[0074] In the formula: is the marginal standard value of the reliable power generation capacity in the area, are respectively the standard values of the power generation capacity supply entity and the power generation capacity demand entity where the reliable power generation capacity finally takes effect in the area, and K2 is the coefficient of the price difference in the area;

[0075] If K2 = 0, the marginal value of reliable power generation capacity in the area is the value of the power generation capacity supply entity; if K2 = 1, the marginal value of reliable power generation capacity in the area is the value of the power generation capacity demand entity; if K2 = 0.5, the marginal value of reliable power generation capacity in the area is the arithmetic mean of the value of the power generation capacity supply entity and the value of the power generation capacity demand entity.

[0076] The reliable power generation capacity guarantee settlement result for each area is obtained by multiplying the marginal value of reliable power generation capacity in each area by the final cleared power generation capacity of the power generation capacity supply entity, as shown in the following formula:

[0077]

[0078] In the formula, the sequence l1 records the reliable power generation capacity guarantee settlement results for each area.

[0079] Furthermore, the specific operation steps of step A5 are as follows:

[0080] A51: Determine the execution information of the reliable power generation capacity for each area through the variable value of the marginal power generation capacity supply entity during the peak load period of each area, as shown in the following formula:

[0081]

[0082] In the formula: P strike is the regional reliability execution value; P t is the output of the regional marginal power generation capacity supply entity at time t during the peak load period t peak , and C is the value function of the regional marginal power generation capacity supply entity;

[0083] A52: Determine the reference information of the reliable power generation capacity for each area including the marginal value of day-ahead electrical energy and the marginal value of real-time electrical energy, then the regional reliability reference value is expressed as:

[0084] p ref = λ × p da + (1 - λ) × p rt

[0085] In the formula: p ref is the regional reliability reference value, p da , p rt are respectively the marginal value of day-ahead electrical energy and the marginal value of real-time electrical energy of the area, and λ is an adjustment parameter with a value range from 0 to 1;

[0086] A53: When the regional reliability reference value is less than or equal to the regional reliability execution value, no operation is required. However, when the regional reliability reference value is higher than the regional reliability execution value, that is, p ref > p strikeWhen calculating the results of the price difference refunds for all power generation capacity suppliers, the calculation formula is as follows:

[0087]

[0088] In the formula: is the price difference refund that the \(u\)-th power generation capacity supplier in the reliable power generation capacity within the region needs to pay to the region; is the price difference refund that the \(m\)-th power generation capacity supplier in the inter-regional reliable power generation capacity under the inter-regional transmission channel \(i\) related to the region needs to pay to the region;

[0089] A54: If during the peak load period of the region, there is a situation where the power generation capacity is unavailable or the power generation capacity is insufficient to provide power according to the cleared power generation capacity among all power generation capacity suppliers related to the region, then this power generation capacity supplier not only cannot obtain the power energy revenue but also needs to pay the price difference refund as a penalty, thereby effectively enhancing the willingness of all power generation capacity suppliers to generate electricity during the peak load period of the region, and summarizing the settlement results of the inter-regional and intra-regional reliable power generation capacity.

[0090] The second objective of the present invention is achieved through the following technical solution: An inter-regional and intra-regional reliable power generation capacity coordinated clearing and settlement system for implementing the above-mentioned inter-regional and intra-regional reliable power generation capacity coordinated clearing and settlement method, including:

[0091] A first calculation module for optimizing and clearing the demand-side information of the power generation capacity demand subjects and the supply-side information of the power generation capacity supply subjects in each region to obtain the pre-clearing results of the reliable power generation capacity within each region;

[0092] An analysis module for analyzing the pre-clearing results of the reliable power generation capacity within each region to obtain the power generation capacity adequacy situation in each region, and then determining the inter-regional reliable power generation capacity information of each region according to the power generation capacity adequacy situation in each region;

[0093] A second calculation module for performing multi-channel centralized optimization and clearing on the inter-regional reliable power generation capacity by combining the inter-regional reliable power generation capacity information of each region and the ATC constraints of each inter-regional transmission channel to obtain the clearing results of the inter-regional reliable power generation capacity and the guarantee settlement results of the inter-regional reliable power generation capacity;

[0094] A third calculation module for finally optimizing and clearing the reliable power generation capacity within each region with the clearing results of the inter-regional reliable power generation capacity as the boundary to obtain the final clearing results of the reliable power generation capacity within each region and the guarantee settlement results of the reliable power generation capacity within each region;

[0095] The settlement module is used to determine the refund price difference results of all power generation capacity suppliers by combining the clearing results of reliable power generation capacity between regions, the final clearing results of reliable power generation capacity within each region, the execution information and reference information of reliable power generation capacity in each region, and determine the power generation capacity shortage penalty results based on the actual power generation capacity supply situation of all power generation capacity suppliers, so as to obtain the settlement results of reliable power generation capacity between regions and within regions.

[0096] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0097] 1. Solve the problem that the willingness of power generation capacity entities to participate in power generation during peak load periods of the power system is relatively low.

[0098] 2. Solve the problem of improper power generation capacity allocation caused by excessive human intervention.

[0099] 3. Improve the effect of optimal power generation capacity allocation and ensure the adequacy of power generation capacity in the power system.

[0100] In summary, the present invention can improve the flexible utilization degree of power generation capacity by increasing the power generation capacity allocation between regions, reduce the urgency of power generation capacity demand in power generation capacity shortage regions, and at the same time further solve the problem that the willingness of power generation capacity entities to participate in power generation during peak load periods of the power system and the problem of improper power generation capacity allocation caused by excessive human intervention on the basis of the prior art having solved the distortion problem of capacity values for energy values, improve the effect of optimal power generation capacity allocation and ensure the adequacy of power generation capacity in the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0101] Figure 1 It is a schematic flow chart of the method of the present invention.

[0102] Figure 2 It is a schematic flow chart of the specific steps of A1 in the method of the present invention.

[0103] Figure 3 It is a schematic flow chart of the specific steps of A2 in the method of the present invention.

[0104] Figure 4 It is a schematic flow chart of the specific steps of A3 in the method of the present invention.

[0105] Figure 5 It is a schematic flow chart of the specific steps of A4 in the method of the present invention.

[0106] Figure 6 It is a schematic flow chart of the specific steps of A5 in the method of the present invention.

[0107] Figure 7 It is an architecture diagram of the system of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0108] The present invention will be further described in detail below in conjunction with embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0109] Embodiment 1

[0110] As Figure 1 shown, this embodiment discloses a method for coordinated clearing and settlement of reliable power generation capacity between regions and within regions, which includes the following steps:

[0111] A1: Optimally clear the demand-side information of the power generation capacity demand entities in each region and the supply-side information of the power generation capacity supply entities to obtain the preliminary clearing results of the reliable power generation capacity within each region. As Figure 2 shown, it includes the following steps:

[0112] A11: Based on the power generation capacity demand information of the power generation capacity demand entities in each region, construct a four-point reliable power generation capacity demand model for each region that includes a starting point, a minimum value point, an expected point, and a maximum value point, to form the demand-side information of the power generation capacity demand entities in each region. The four-point reliable power generation capacity demand model that includes a starting point, a minimum value point, an expected point, and a maximum value point is:

[0113] f(x) = {f1(x), x ∈ [0, z min ; f2(x), x ∈ (z min , z expect ; f3(x), x ∈ (z expect , z max}

[0114] f1(x) = h VOLL

[0115]

[0116]

[0117] where: f(x) is the four-point reliable power generation capacity demand function within the region, x is the independent variable of f(x), f1(x), f2(x), and f3(x) are the three piecewise functions of f(x). The starting point is taken as x = 0, z min , z expect , z max are respectively the minimum demand of the reliable power generation capacity within the region corresponding to the minimum value point, the expected demand of the reliable power generation capacity within the region corresponding to the expected point, and the maximum demand of the reliable power generation capacity within the region corresponding to the maximum value point, h VOLL , h expect are respectively the load shedding standard value within the region and the expected standard value of the power generation capacity within the region;

[0118] Taking Region A and Region B as examples, the parameter settings of the examples are as follows:

[0119] Table 1 Four-point reliability power generation capacity demand model parameter table for two regions

[0120] Region Starting point Minimum point Expected point Maximum point Region A [0,100] [100,100] [130,70] [200,0] Region B [0,95] [90,95] [120,80] [170,0]

[0121] A12: Based on the power generation capacity supply information of the power generation capacity supply entities in each region, construct a stepped reliability power generation capacity supply model for each region to form the supply-side information of the power generation capacity supply entities in each region. The stepped reliability power generation capacity supply model is as follows:

[0122]

[0123] g1(t) ≤ g2(t) ≤... ≤ g n (t)

[0124] In the formula: g(t) is the stepped reliability power generation capacity supply function within the region, t is the independent variable of g(t), and g1(t), g2(t),..., g n (t) are the n piecewise functions of g(t), representing the numerical values of n power generation capacity supply entities within the region. q1 is the power generation capacity of the first power generation capacity supply entity within the region, and q u is the power generation capacity of the u-th power generation capacity supply entity within the region, where u is the traversal subscript of the power generation capacity supply entities within the region;

[0125] Taking Region A and Region B as examples, the parameter settings of the examples are as follows:

[0126] Table 2 Stepped reliability power generation capacity supply model parameter table for Region A

[0127]

[0128] Table 3 Stepped reliability power generation capacity supply model parameter table for Region B

[0129]

[0130] A13: Optimize and clear the demand-side information of the power generation capacity demand entities and the supply-side information of the power generation capacity supply entities in each region. Among them, the same mathematical model is used in each region, with the maximization of the comprehensive numerical value of the reliability power generation capacity within the region as the objective function, and there are capacity constraints and total effective quantity constraints for the reliability power generation capacity supply entities within the region, to obtain the pre-clearing results of the reliability power generation capacity within each region. The mathematical model for the optimization and clearing is as follows:

[0131] Objective function:

[0132] Capacity constraint for the reliability power generation capacity supply entities within the region:

[0133] Effective total constraint: Let \(S1(y)=f(x)-g(t)\) and \(S1(y * ) = 0, 0 < y ≤ y *

[0134] where: max represents maximization, and the measurement scales and units of the horizontal and vertical coordinates of \(f(x)\), \(g(t)\), and \(S1(y)\) are exactly the same. represents the integral of \(f(x)\) from 0 to y, represents the integral of \(g(t)\) from 0 to y, represents the comprehensive standard value of reliable power generation capacity in the area, \(q\) bid-in,u is the pre-cleared power generation capacity of the \(u\)th power generation capacity supply entity in the area, \(S1(y)\) is the surplus function of the comprehensive standard value of reliable power generation capacity in the area, \(y\) is the independent variable of \(S1(y)\), and \(y * is the pre-effective total amount of reliable power generation capacity in the area;

[0135] From the above optimized clearing mathematical model, the pre-cleared results of reliable power generation capacity in each area can be obtained: including the pre-cleared situation sequence \(b\) of the reliable power generation capacity entity in the area and the pre-effective total amount \(y\) of reliable power generation capacity in the area * , where:

[0136] \(b = \{q bid-in,1 , q bid-in,2 ,......, q bid-in,n \}\)

[0137] In the formula, the sequence \(b\) records the pre-cleared situation of the reliable power generation capacity supply entity in the area, and \(q bid-in,1 is the pre-cleared power generation capacity of the 1st power generation capacity supply entity in the area, \(q bid-in,2 is the pre-cleared power generation capacity of the 2nd power generation capacity supply entity in the area, and \(q bid-in,n is the pre-cleared power generation capacity of the \(n\)th power generation capacity supply entity in the area.

[0138] Taking the two areas of Area A and Area B as examples, the operation results of the examples are as follows:

[0139] Table 4 Pre-cleared Results of Reliable Power Generation Capacity in Area A and Area B

[0140]

[0141] A2: Analyze the pre-cleared results of reliable power generation capacity in each area to obtain the power generation capacity adequacy situation in each area, and then determine the inter-regional reliable power generation capacity information in each area according to the power generation capacity adequacy situation in each area, as Figure 3 shown, including the following steps:

[0142] A21: Analyze the pre-clearing results of the reliable power generation capacity in each region to obtain the power generation capacity adequacy of each region. If the analysis result is y * > z expect It indicates that the power generation capacity of the region is relatively abundant; otherwise, the power generation capacity of the region is relatively tight.

[0143] Taking Region A and Region B as examples, the operation results of the examples are as follows:

[0144] The power generation capacity of Region A is abundant, and the power generation capacity of Region B is tight.

[0145] A22: According to the power generation capacity adequacy of each region, determine the supply and demand situations of each region in the inter-regional reliable power generation capacity. If the power generation capacity of the region is relatively tight, then this region serves as the demand region for the inter-regional reliable power generation capacity, and obtain the information on the demand side of the inter-regional reliable power generation capacity. If the power generation capacity of the region is relatively abundant, then this region serves as the supply region for the inter-regional reliable power generation capacity, and obtain the information on the supply side of the inter-regional reliable power generation capacity. Finally, obtain the inter-regional reliable power generation capacity information of each region.

[0146] Taking Region A and Region B as examples, the operation results of the examples are as follows:

[0147] Region A serves as the supply region for the inter-regional reliable power generation capacity, and Region B serves as the demand region for the inter-regional reliable power generation capacity.

[0148] A3: Combine the inter-regional reliable power generation capacity information of each region and the ATC constraints of each inter-regional transmission channel to perform multi-channel centralized optimization clearing on the inter-regional reliable power generation capacity, and obtain the clearing result of the inter-regional reliable power generation capacity and the guarantee settlement result of the inter-regional reliable power generation capacity. As Figure 4 shown, it includes the following steps:

[0149] A31: Determine the supply region and demand region of each transmission channel according to the connection relationship, and then use the information on the demand side of the inter-regional reliable power generation capacity related to the inter-regional transmission channel i to construct a stepped inter-regional reliable power generation capacity demand model. The stepped inter-regional reliable power generation capacity demand model is:

[0150]

[0151]

[0152] In the formula: e i (r i ) is the inter-regional reliable power generation capacity demand function of the inter-regional transmission channel i. i is the superscript for traversing the inter-regional transmission channels, and r i is e i(r i ) is the independent variable of which is e i (r i ). It represents the o demand area values of the inter-regional transmission channel i. r1 is the power generation capacity of the first demand area of the inter-regional transmission channel i, and is the power generation capacity of the p-th demand area of the inter-regional transmission channel i, where p is the traversal subscript of the demand area;

[0153] Taking the two regions of Region A and Region B as examples, the parameter settings of the example are as follows:

[0154] Table 5 Parameter Table of the Step-shaped Inter-regional Reliable Power Generation Capacity Demand Model for Region B

[0155]

[0156] A32: Using the inter-regional reliable power generation capacity supply-side information related to the inter-regional transmission channel i, construct a step-shaped inter-regional reliable power generation capacity supply model, and the step-shaped inter-regional reliable power generation capacity supply model is:

[0157]

[0158] In the formula: d i (w i ) is the inter-regional reliable power generation capacity supply function of the inter-regional transmission channel i, and w i is the independent variable of d i (w i ), and is the j piecewise functions of d i (w i ), representing the j supply area values of the inter-regional transmission channel i, represents the power generation capacity of the first supply area of the inter-regional transmission channel i, represents the power generation capacity of the m-th supply area of the inter-regional transmission channel i, where m is the traversal subscript of the supply area;

[0159] Taking the two regions of Region A and Region B as examples, the parameter settings of the example are as follows:

[0160] Table 6 Parameter Table of the Step-shaped Inter-regional Reliable Power Generation Capacity Supply Model for Region A

[0161]

[0162] Combined with the inter-regional reliability generation capacity information of each region and the ATC constraints of each transmission channel between regions, multi-channel centralized optimization clearing is performed on the inter-regional reliability generation capacity. With the maximization of the comprehensive standard value of the inter-regional reliability generation capacity as the objective function, there are constraints on the clearing capacity of the inter-regional reliability generation capacity demand and supply, the effective total amount constraint, and the ATC constraint of the transmission channel i between regions, and the clearing result of the inter-regional reliability generation capacity is obtained. The mathematical model of the optimization clearing is as follows:

[0163] Objective function:

[0164] Constraint on the clearing capacity of the inter-regional reliability generation capacity demand:

[0165] Constraint on the clearing capacity of the inter-regional reliability generation capacity supply:

[0166] Effective total amount constraint: Let And

[0167] ATC constraint of the transmission channel i between regions:

[0168] In the formula: max represents maximization, e i (r i )、d i (w i ) and The measurement scales and units of the horizontal and vertical coordinates are exactly the same, is the integral of the e i (r i ) function corresponding to the transmission channel i between regions from 0 to a i , is the integral of the d i (w i ) function corresponding to the transmission channel i between regions from 0 to a i , represents the comprehensive standard value of the inter-regional reliability generation capacity of the transmission channel i between regions, represents the cleared generation capacity of the pth demand region of the transmission channel i between regions, represents the cleared generation capacity of the mth supply region of the transmission channel i between regions, is the surplus function of the comprehensive standard value of the inter-regional reliability generation capacity, a i is 's independent variable, represents the effective total amount of the inter-regional reliability generation capacity of the transmission channel i between regions, ATC i represents the available transfer capacity of the transmission channel i between regions;

[0169] The optimized clearing mathematical model described above can obtain the inter-regional reliable generation capacity clearing results: including the sequence c of the inter-regional reliable generation capacity clearing conditions for the inter-regional transmission channel i i and the total amount of effective inter-regional reliable generation capacity value, where:

[0170]

[0171] In the formula: The sequence c i records the inter-regional reliable generation capacity clearing conditions for the inter-regional transmission channel i, is the cleared generation capacity of the first demand area of the inter-regional transmission channel i, is the cleared generation capacity of the second demand area of the inter-regional transmission channel i, is the cleared generation capacity of the oth demand area of the inter-regional transmission channel i, is the cleared generation capacity of the first supply area of the inter-regional transmission channel i, is the cleared generation capacity of the second supply area of the inter-regional transmission channel i, is the cleared generation capacity of the jth supply area of the inter-regional transmission channel i;

[0172] Taking the two regions of Region A and Region B as examples, the setting parameters and operation results of the examples are as follows: The inter-regional transmission channel constraint is set to ATC = 20 MW;

[0173] Table 7 Inter-regional Reliable Generation Capacity Clearing Conditions Table for Region A and Region B

[0174]

[0175] The total amount of effective inter-regional reliable generation capacity value is 10 MW;

[0176] A34: Calculate the marginal bid value of the supply area of the inter-regional reliable generation capacity of the inter-regional transmission channel i according to the marginal pricing method, as shown in the following formula:

[0177]

[0178] In the formula: is the marginal bid value of the supply area of the inter-regional reliable generation capacity of the inter-regional transmission channel i, are respectively the bid values of the demand area and the supply area where the inter-regional reliable generation capacity of the inter-regional transmission channel i finally takes effect, and K1 is the inter-regional bid difference coefficient;

[0179] If K1 = 0, the marginal value of the reliability power generation capacity supply area between regions is the value of the supply area that took effect last; if K1 = 1, the marginal value of the reliability power generation capacity supply area between regions is the value of the demand area that took effect last; if K1 = 0.5, the marginal value of the reliability power generation capacity supply area between regions is the arithmetic mean of the value of the demand area and the value of the supply area that took effect last;

[0180] The reliability power generation capacity guarantee settlement result between regions is obtained by multiplying the marginal value of the reliability power generation capacity supply area between regions of the inter-regional transmission channel i by the cleared power generation capacity of the demand area or the cleared power generation capacity of the supply area, as shown in the following formula:

[0181]

[0182] In the formula: sequence l i Records the reliability power generation capacity guarantee settlement result of the inter-regional transmission channel i in the reliability power generation capacity between regions.

[0183] Taking the two regions of Region A and Region B as examples, the example operation results are as follows:

[0184] The difference coefficient of the inter-regional price between Region A and Region B is set to 0.5;

[0185] Table 8 Reliability Power Generation Capacity Guarantee Settlement Result Table between Region A and Region B

[0186]

[0187] A4: Taking the cleared result of the reliability power generation capacity between regions as the boundary, the reliability power generation capacity within each region is finally optimized and cleared to obtain the final cleared result of the reliability power generation capacity within each region and the reliability power generation capacity guarantee settlement result within each region, as Figure 5 shown, including the following steps:

[0188] A41: Taking the cleared result of the reliability power generation capacity between regions as the boundary, the reliability power generation capacity within each region is finally optimized and cleared. The mathematical model of the final optimization and clearing is:

[0189] Objective function:

[0190] Among them,

[0191]

[0192] g1(t) ≤ g2(t) ≤.... ≤ g n (t)

[0193] Clearing capacity constraint of the reliability power generation capacity supply entity within the region:

[0194] Effective total amount constraint: Let S3(y new ) = f(x) - g new (t) and S3(y new* ) = 0, 0 < y new ≤y new*

[0195] where: max represents maximization, and the measurement scales and units of the horizontal and vertical coordinates of f(x), g new (t), and S3(y new ) are exactly the same, is the integral of the f(x) function from 0 to y new , is the integral of the g new (t) function from 0 to y new , represents the updated comprehensive standard value of the reliable power generation capacity within this region, g new (t) is the supply function of the reliable power generation capacity within the updated region, t is the independent variable of both g(t) and g new (t), Δq1 is the reliable power generation capacity between regions cleared by the first power generation capacity supply entity, Δq u is the reliable power generation capacity between regions cleared by the u-th power generation capacity supply entity, is the final cleared power generation capacity of the u-th power generation capacity supply entity, S3(y new ) is the surplus function of the comprehensive standard value of the reliable power generation capacity within the region updated with the cleared result of the reliable power generation capacity between regions as the boundary, y new is the independent variable of S3(y new ), y new* represents the final effective total amount of the reliable power generation capacity within the region;

[0196] From the above finally optimized clearing mathematical model, the final clearing results of the reliable power generation capacity within each region can be obtained: including the final clearing result sequence b of the reliable power generation capacity supply entities within the region new and the final effective total amount y of the reliable power generation capacity within the region new* , where:

[0197]

[0198] where: the sequence b new records the final clearing results of the reliable power generation capacity supply entities within the region, is the final cleared power generation capacity of the first power generation capacity supply entity, is the final cleared power generation capacity of the second power generation capacity supply entity, is the final cleared generation capacity of the nth generation capacity provider;

[0199] Taking Region A and Region B as examples, the example operation results are as follows:

[0200] Table 9 Final Clearing Results of In-region Reliable Generation Capacity for Region A and Region B

[0201]

[0202] A42: Calculate the marginal bid value of the in-region reliable generation capacity according to the marginal pricing method, as shown in the following formula:

[0203]

[0204] In the formula: is the marginal bid value of the in-region reliable generation capacity, are respectively the bid values of the generation capacity provider and the generation capacity demander that finally take effect for the in-region reliable generation capacity, and K2 is the in-region bid difference coefficient;

[0205] If K2 = 0, the marginal bid value of the in-region reliable generation capacity is the bid value of the generation capacity provider; if K2 = 1, the marginal bid value of the in-region reliable generation capacity is the bid value of the generation capacity demander; if K2 = 0.5, the marginal bid value of the in-region reliable generation capacity is the arithmetic mean of the bid values of the generation capacity provider and the generation capacity demander;

[0206] Obtain the in-region reliable generation capacity guarantee settlement result by multiplying the marginal bid value of the in-region reliable generation capacity by the final cleared generation capacity of the generation capacity provider, as shown in the following formula:

[0207]

[0208] In the formula, sequence l1 records the in-region reliable generation capacity guarantee settlement results.

[0209] Taking Region A and Region B as two examples, the example operation results are as follows:

[0210] The in-region bid difference coefficients of Region A and Region B are both set to 0;

[0211] Table 10 In-region Reliable Generation Capacity Guarantee Settlement Results Table for Region A and Region B

[0212]

[0213] A5: Combine the cleared results of reliable generation capacity between regions, the final cleared results of reliable generation capacity within each region, the execution information and reference information of reliable generation capacity in each region to determine the refund price difference results of all generation capacity supply entities, and determine the generation capacity shortage penalty results based on the actual supply of generation capacity of all generation capacity supply entities, so as to obtain the settlement results of reliable generation capacity between regions and within regions, as Figure 6 shown, including the following steps:

[0214] A51: Determine the execution information of reliable generation capacity in each region through the variable bid values of the marginal generation capacity entities during the peak load period in each region, as shown in the following formula:

[0215]

[0216] In the formula: P strike is the regional reliability execution bid value; P t is the output of the regional marginal generation capacity supply entity at time t during the peak load period t peak , and C is the bid value function of the regional marginal generation capacity supply entity;

[0217] Taking the two regions of Region A and Region B as examples, the example setting parameters are as follows:

[0218] Table 11 Execution Information Table of Reliable Generation Capacity in Region A and Region B

[0219] Region Execution information Region A[Marked value] 250 Region B[Marked value] 300

[0220] A52: Determine the reference information of reliable generation capacity in each region including the day-ahead electricity energy marginal bid value and the real-time electricity energy bid value. Then the regional reliability reference bid value is expressed as:

[0221] p ref = λ × p da + (1 - λ) × p rt

[0222] In the formula: p ref is the regional reliability reference bid value, p da , p rt are the day-ahead electricity energy marginal bid value and the real-time electricity energy marginal bid value of the region respectively, and λ is the adjustment parameter with a value range from 0 to 1;

[0223] Taking Region A and Region B as examples, the example setting parameters are as follows:

[0224] Table 12 Reference Information Table of Reliable Generation Capacity in Region A and Region B

[0225] Region Daily electricity energy marginal marked value Real-time electricity energy marginal marked value Adjustment parameter Region A 255 253 0.5 Region B 309 299 0.5

[0226] A53: When the regional reliability reference value is lower than or equal to the regional reliability enforcement value, no action is required. However, when the regional reliability reference value is higher than the regional reliability enforcement value, i.e., p ref > p strike calculate the results of the price difference refund for all power generation capacity supply entities, and the calculation formula is:

[0227]

[0228] In the formula: is the price difference refund that the u-th power generation capacity supply entity in the regional reliability power generation capacity needs to pay to the region, is the price difference refund that the m-th power generation capacity entity in the inter-regional reliability power generation capacity under the inter-regional transmission channel i related to the region needs to pay to the region;

[0229] Taking Region A and Region B as examples, the example setting parameters are as follows:

[0230] Table 13 Price difference refund table for all power generation capacity supply entities in Region A and Region B

[0231]

[0232] A54: If during the peak load period of the region, there is a situation where the power generation capacity of all power generation capacity supply entities related to the region is unavailable or the power generation capacity is insufficient to provide power according to the cleared power generation capacity, then this power generation capacity supply entity not only cannot obtain the electric energy income but also needs to pay the price difference refund as a penalty, thereby effectively enhancing the willingness of all power generation capacity supply entities to generate electricity during the peak load period of the region, and summarizing the settlement results of the inter-regional and intra-regional reliability power generation capacity.

[0233] Taking Region A and Region B as examples, the example operation results are the operation results of Table 8, Table 10, and Table 13.

[0234] The experimental results fully prove the effectiveness of the method of the present invention. The power generation capacity of Region A is relatively abundant, so the reference values of the supply entities in this region are generally low. While the power generation capacity of Region B is relatively tight, so the reference values of the supply entities in this region are generally high, reflecting the supply and demand relationship. At the same time, the inter-regional reliability power generation capacity also provides coordination and cooperation for the two. Region A can provide power generation capacity resources for Region B under the physical conditions of the inter-regional transmission channel, and the power generation capacity configuration result conforms to the characteristics of maximizing the comprehensive reference value.

[0235] Experimental conclusion: Aiming at the problems existing in the existing methods for reflecting the adequacy of power generation capacity, such as the scarcity method and the capacity method, including large fluctuations in the electrical energy value, low acceptance degree of the power generation capacity supply entity, and inability to effectively reflect the supply-demand relationship of power generation capacity, the present invention proposes a coordinated clearing and settlement method for inter-regional and intra-regional reliable power generation capacity. The publicly available experimental data show that the use of the present invention does not have a strong impact on the electrical energy value of the power generation capacity supply entity, and makes the power generation capacity supply entity more inclined to supply power generation capacity based on the marginal value, improves the power generation capacity allocation result, and effectively reflects the supply-demand relationship of power generation capacity. In the next research, the rationality of setting the execution information and reference information of reliable power generation capacity will be explored, which has good application prospects and is worthy of popularization.

[0236] Embodiment 2

[0237] This embodiment discloses an inter-regional and intra-regional reliable power generation capacity coordinated clearing and settlement system for implementing the inter-regional and intra-regional reliable power generation capacity coordinated clearing and settlement method described in Embodiment 1, as Figure 7 shown, including the following functional modules:

[0238] The first calculation module is used to optimize the clearing of the demand-side information of the power generation capacity demand entities in each region and the supply-side information of the power generation capacity supply entities to obtain the preliminary clearing results of the reliable power generation capacity within each region;

[0239] The analysis module is used to analyze the preliminary clearing results of the reliable power generation capacity within each region to obtain the adequacy of the power generation capacity in each region, and then determine the inter-regional reliable power generation capacity information of each region according to the adequacy of the power generation capacity in each region;

[0240] The second calculation module is used to combine the inter-regional reliable power generation capacity information of each region and the ATC constraints of each transmission channel between regions to perform multi-channel centralized optimization clearing on the inter-regional reliable power generation capacity, and obtain the clearing results of the inter-regional reliable power generation capacity and the guarantee settlement results of the inter-regional reliable power generation capacity;

[0241] The third calculation module is used to perform final optimization clearing on the reliable power generation capacity within each region with the clearing results of the inter-regional reliable power generation capacity as the boundary, and obtain the final clearing results of the reliable power generation capacity within each region and the guarantee settlement results of the reliable power generation capacity within each region;

[0242] The settlement module is used to determine the refund price difference results of all power generation capacity supply entities by combining the clearing results of reliable power generation capacity between regions, the final clearing results of reliable power generation capacity within each region, the execution information and reference information of reliable power generation capacity in each region, and determine the power generation capacity shortage penalty results based on the actual power generation capacity supply situation of all power generation capacity supply entities, so as to obtain the settlement results of reliable power generation capacity between regions and within regions.

[0243] The implementation manners of the present invention are not limited by the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention shall be equivalent replacement manners and are all included in the protection scope of the present invention.

Claims

1. A method for coordinated clearing and settlement of reliable power generation capacity between and within regions, characterized in that, Including: A1: Optimally clearing the demand-side information of the power generation capacity demand entities in each region and the supply-side information of the power generation capacity supply entities to obtain the preliminary clearing results of the reliable power generation capacity within each region; A2: Analyzing the preliminary clearing results of the reliable power generation capacity within each region to obtain the power generation capacity adequacy situation in each region, and then determining the inter-regional reliable power generation capacity information for each region based on the power generation capacity adequacy situation in each region; A3: Combining the inter-regional reliable power generation capacity information of each region and the ATC constraints of each transmission channel between regions, performing multi-channel centralized optimal clearing on the inter-regional reliable power generation capacity to obtain the inter-regional reliable power generation capacity clearing results and the inter-regional reliable power generation capacity guarantee settlement results; A4: Taking the inter-regional reliable power generation capacity clearing results as the boundary to perform the final optimal clearing on the reliable power generation capacity within each region to obtain the final clearing results of the reliable power generation capacity within each region and the reliable power generation capacity guarantee settlement results within each region; A5: Combining the inter-regional reliable power generation capacity clearing results, the final clearing results of the reliable power generation capacity within each region, the execution information and reference information of the reliable power generation capacity in each region to determine the return price difference results of all power generation capacity supply entities, and determining the power generation capacity shortage penalty results based on the actual power generation capacity supply situation of all power generation capacity supply entities to obtain the inter-regional and intra-regional reliable power generation capacity settlement results.

2. The coordinated clearing and settlement method for reliable power generation capacity between regions and within regions according to claim 1, wherein The specific operation steps of step A1 are as follows: A11: Based on the power generation capacity demand information of the power generation capacity demand entities in each region, constructing a four-point reliability power generation capacity demand model for each region including a starting point, a minimum value point, an expected point, and a maximum value point to form the demand-side information of the power generation capacity demand entities in each region. The four-point reliability power generation capacity demand model including a starting point, a minimum value point, an expected point, and a maximum value point is: f(x) = {f1(x), x ∈ [0, z min ; f2(x), x ∈ (z min , z expect ; f3(x), x ∈ (z expect , z max} f1(x) = h VOLL Where: f(x) is the four-point reliability power generation capacity demand function in the region, x is the independent variable of f(x), f1(x), f2(x), and f3(x) are the three piecewise functions of f(x), the starting point is taken as x = 0, z min 、z expect 、z max are respectively the minimum demand for reliability power generation capacity in the region corresponding to the minimum point, the expected demand for reliability power generation capacity in the region corresponding to the expected point, and the maximum demand for reliability power generation capacity in the region corresponding to the maximum point, h VOLL 、h expect are respectively the load loss index value in the region and the expected index value of power generation capacity in the region; A12: Based on the power generation capacity supply information of the power generation capacity supply entities in each region, constructing a stepped reliability power generation capacity supply model for each region to form the supply-side information of the power generation capacity supply entities in each region. The stepped reliability power generation capacity supply model is: g1(t) ≤ g2(t) ≤... ≤ g n (t) Where: g(t) is the stepped reliability power generation capacity supply function within the region, t is the independent variable of g(t), and g1(t), g2(t),..., g n (t) are the n piecewise functions of g(t), representing the numerical values of n power generation capacity supply entities within the region. q1 is the power generation capacity of the first power generation capacity supply entity within the region, and q u is the power generation capacity of the u-th power generation capacity supply entity within the region, and u is the traversal subscript of the power generation capacity supply entities within the region; A13: Optimally clearing the demand-side information of the power generation capacity demand entities in each region and the supply-side information of the power generation capacity supply entities in each region. Among them, the same mathematical model is used in each region, with the maximization of the comprehensive standard value of the reliable power generation capacity within the region as the objective function, and there are constraints on the capacity of the reliable power generation capacity supply entities within the region and the effective total amount constraint to obtain the preliminary clearing results of the reliable power generation capacity within each region. The mathematical model of the optimal clearing is: Objective function: Capacity constraint of the reliability power generation capacity supply entity within the region: Effective total quantity constraint: Let S1(y) = f(x) - g(t) and S1(y * ) = 0, 0 < y ≤ y * where: max represents maximization, and the measurement scales and units of the abscissa and ordinate of f(x), g(t), and S1(y) are exactly the same. represents the integral of f(x) from 0 to y. represents the integral of g(t) from 0 to y. represents the comprehensive standard value of reliable power generation capacity within the region, q bid-in,u is the pre-cleared power generation capacity of the u-th power generation capacity supply entity within the region, S1(y) is the surplus function of the comprehensive standard value of reliable power generation capacity within the region, y is the independent variable of S1(y), and y * is the total pre-effective amount of reliable power generation capacity within the region. The pre-clearing results of the reliable generation capacity in each region can be obtained from the above optimized clearing mathematical model: including the pre-clearing situation sequence b of the main body of the reliable generation capacity in the region and the total pre-effective amount y of the reliable generation capacity in the region * , where: b = {q bid-in,1 , q bid -in, 2,......, q bid-in,n} In the formula, the sequence b records the pre-clearing situation of the reliable power generation capacity suppliers in the area, and q bid-in,1 is the pre-clearing power generation capacity of the first power generation capacity supplier in the area, and q bid-in,2 is the pre-clearing power generation capacity of the second power generation capacity supplier in the area, and q bid-in,n is the pre-clearing power generation capacity of the nth power generation capacity supplier in the area.

3. The coordinated clearing and settlement method for reliable power generation capacity between regions and within regions according to claim 2, characterized in that, The specific operation steps of step A2 are as follows: A21: Analyze the pre-clearing results of the reliable power generation capacity in each region to obtain the power generation capacity adequacy of each region. If the analysis result is y * > z expect It indicates that the power generation capacity of the region is sufficient; otherwise, the power generation capacity of the region is tight. A22: Determine the supply and demand situations of each region in the inter-regional reliable power generation capacity according to the adequacy of the power generation capacity in each region. If the power generation capacity in a region is tight, then this region serves as the demand region for the inter-regional reliable power generation capacity, and obtain the information on the demand side of the inter-regional reliable power generation capacity. If the power generation capacity in a region is abundant, then this region serves as the supply region for the inter-regional reliable power generation capacity, and obtain the information on the supply side of the inter-regional reliable power generation capacity. Finally, obtain the inter-regional reliable power generation capacity information for each region.

4. The coordinated clearing and settlement method for reliable power generation capacity between regions and within regions according to claim 3, wherein The specific operation steps of step A3 are as follows: A31: Determine the supply region and demand region of each transmission channel according to the connection relationship, and then use the information on the demand side of the inter-regional reliable power generation capacity related to the inter-regional transmission channel i to construct a stepped inter-regional reliable power generation capacity demand model. The stepped inter-regional reliable power generation capacity demand model is: where: e i (r i ) is the inter-regional reliability generation capacity demand function of the inter-regional power transmission channel i, i is the superscript for traversing the inter-regional power transmission channels, r i is the independent variable of e i (r i ), is the o piecewise functions of e i (r i ), representing the o demand area values of the inter-regional power transmission channel i, is the generation capacity of the first demand area of the inter-regional power transmission channel i, is the generation capacity of the p-th demand area of the inter-regional power transmission channel i, p is the subscript for traversing the demand areas; A32: Use the information on the supply side of the inter-regional reliable power generation capacity related to the inter-regional transmission channel i to construct a stepped inter-regional reliable power generation capacity supply model. The stepped inter-regional reliable power generation capacity supply model is: where: d i (w i ) is the inter-regional reliability power generation capacity supply function of the inter-regional transmission channel i, and w i is the independent variable of d i (w i ). is the j-piecewise function of d i (w i ), representing the j supply area values of the inter-regional transmission channel i, represents the power generation capacity of the first supply area of the inter-regional transmission channel i, represents the power generation capacity of the m-th supply area of the inter-regional transmission channel i, where m is the traversal subscript of the supply area; A33: Combine the inter-regional reliable power generation capacity information of each region and the ATC constraints of each inter-regional transmission channel, and perform multi-channel centralized optimization clearing on the inter-regional reliable power generation capacity. With the maximization of the comprehensive standard value of the inter-regional reliable power generation capacity as the objective function, there are constraints on the cleared capacity of the demand and supply of the inter-regional reliable power generation capacity, the effective total amount constraint, and the ATC constraint of the inter-regional transmission channel i, and obtain the cleared result of the inter-regional reliable power generation capacity. The mathematical model of the optimization clearing is: Objective function: Inter-regional reliability generation capacity demand clearing capacity constraint: Inter-regional reliability power generation capacity supply clearing capacity constraint: Effective total amount constraint: Let and ATC constraints for the inter-regional power transmission channel i: where: max represents maximization, e i (r i )、d i (w i ) and have exactly the same measurement scales and units for the horizontal and vertical coordinates, is the integral of the e i (r i ) function corresponding to the inter-regional transmission channel i from 0 to a i , is the integral of the d i (w i ) function corresponding to the inter-regional transmission channel i from 0 to a i , represents the comprehensive standard value of the inter-regional reliable generation capacity of the inter-regional transmission channel i, represents the cleared generation capacity of the pth demand area of the inter-regional transmission channel i, represents the cleared generation capacity of the mth supply area of the inter-regional transmission channel i, is the surplus function of the comprehensive standard value of the inter-regional reliable generation capacity, a i is 's independent variable, represents the total effective amount of the inter-regional reliable generation capacity of the inter-regional transmission channel i, ATC i represents the available transfer capacity of the inter-regional transmission channel i; The above optimized clearing mathematical model can obtain the inter-region reliability generation capacity clearing results: including the sequence c of the inter-region reliability generation capacity clearing situation of the inter-region transmission channel i i and the total effective amount of the inter-region reliability generation capacity Wherein: Where: sequence c i records the clearing situation of the inter-regional reliable power generation capacity of the inter-regional power transmission channel i, is the cleared power generation capacity of the first demand area of the inter-regional power transmission channel i, is the cleared power generation capacity of the second demand area of the inter-regional power transmission channel i, is the cleared power generation capacity of the oth demand area of the inter-regional power transmission channel i, is the cleared power generation capacity of the first supply area of the inter-regional power transmission channel i, is the cleared power generation capacity of the second supply area of the inter-regional power transmission channel i, is the cleared power generation capacity of the jth supply area of the inter-regional power transmission channel i; A34: Calculate the marginal standard value of the supply region of the inter-regional reliable power generation capacity of the inter-regional transmission channel i according to the marginal pricing method, as shown in the following formula: In the formula: is the marginal value of the reliability power generation capacity supply area of the inter-regional power transmission channel i, are respectively the demand area value and the supply area value at which the reliability power generation capacity of the inter-regional power transmission channel i finally takes effect, and K1 is the coefficient of the inter-regional price difference; If K1 = 0, then the marginal standard value of the supply region of the inter-regional reliable power generation capacity is the last effective supply region standard value; if K1 = 1, then the marginal standard value of the supply region of the inter-regional reliable power generation capacity is the last effective demand region standard value; if K1 = 0.5, then the marginal standard value of the supply region of the inter-regional reliable power generation capacity is the arithmetic mean of the last effective demand region standard value and the supply region standard value; Obtain the guaranteed settlement result of the inter-regional reliable power generation capacity by multiplying the marginal standard value of the supply region of the inter-regional reliable power generation capacity of the inter-regional transmission channel i by the cleared power generation capacity of the demand region or the cleared power generation capacity of the supply region, as shown in the following formula: Where: sequence l i Record the settlement result of ensuring the inter-regional reliable power generation capacity of the inter-regional transmission channel i in the inter-regional reliable power generation capacity between the record areas.

5. A method for coordinated clearing and settlement of reliable power generation capacity between regions and within regions according to claim 4, characterized in that The specific operation steps of step A4 are as follows: A41: Perform final optimization clearing on the intra-regional reliable power generation capacity with the cleared result of the inter-regional reliable power generation capacity as the boundary. The mathematical model of the final optimization clearing is: Objective function: Wherein, g1(t) ≤ g2(t) ≤.... ≤ g n (t) Clearing capacity constraint for reliable power generation capacity suppliers within the area: Effective total quantity constraint: Let S3(y new ) = f(x) - g new (t) and S3(y new* ) = 0 0 < y new ≤ y new* Where: max represents maximization, f(x), g new (t) and the measurement scales and units of the abscissa and ordinate of S3(y new ) are exactly the same, is the integral of the f(x) function from 0 to y new , is the integral of the g new (t) function from 0 to y new , represents the comprehensive standard value of reliable power generation capacity in the updated area, g new (t) is the reliable power generation capacity supply function in the updated area, and t is the independent variable of both g(t) and g new (t), Δq1 is the inter-regional reliable power generation capacity cleared by the first power generation capacity supply entity, Δq u is the inter-regional reliable power generation capacity cleared by the u-th power generation capacity supply entity, is the final cleared power generation capacity of the u-th power generation capacity supply entity, S3(y new ) is the surplus function of the comprehensive standard value of reliable power generation capacity in the area updated with the clearing result of inter-regional reliable power generation capacity as the boundary, y new is the independent variable of S3(y new ), and y new* represents the total amount of reliable power generation capacity finally in effect in the area; The final cleared mathematical model optimized above can obtain the final cleared results of the reliable power generation capacity in each region: including the final cleared result sequence b of the reliable power generation capacity supply entities in the region new and the final effective total amount y of the reliable power generation capacity in the region new* , where: where: sequence b new records the final clearing result of the reliable power generation capacity supply entity within the recording area, is the final cleared power generation capacity of the 1st power generation capacity supply entity, is the final cleared power generation capacity of the 2nd power generation capacity supply entity, is the final cleared power generation capacity of the nth power generation capacity supply entity; A42: Calculate the marginal standard value of the intra-regional reliable power generation capacity according to the marginal pricing method, as shown in the following formula: In the formula: is the marginal value of reliable power generation capacity in the area, are respectively the labels of the power generation capacity supply entity and the power generation capacity demand entity where the reliable power generation capacity in the area finally takes effect, and K2 is the price difference coefficient in the area; If K2 = 0, the marginal value of reliable generation capacity in the region is the value of the generation capacity supply entity; if K2 = 1, the marginal value of reliable generation capacity in the region is the value of the generation capacity demand entity; if K2 = 0.5, the marginal value of reliable generation capacity in the region is the arithmetic mean of the value of the generation capacity supply entity and the value of the generation capacity demand entity; The settlement result of reliable generation capacity guarantee in each region is obtained by multiplying the marginal value of reliable generation capacity in each region by the final cleared generation capacity of the generation capacity supply entity, as shown in the following formula: In the formula, the sequence l1 records the settlement result of reliable generation capacity guarantee in each region.

6. A method for coordinated clearing and settlement of reliable power generation capacity between regions and within regions according to claim 5, characterized in that The specific operation steps of step A5 are as follows: A51: Determine the execution information of reliable generation capacity in each region through the variable value of the marginal generation capacity supply entity during the peak load period in each region, as shown in the following formula: Where: P strike is the regional reliability execution standard value; P t is the output of the regional marginal generation capacity supply entity during the peak load period t peak at time t, and C is the standard value function of the regional marginal generation capacity supply entity; A52: Determine the reference information of reliable generation capacity in each region including the marginal value of day-ahead electric energy and the marginal value of real-time electric energy, and the reliable reference value in the region is expressed as: p ref = λ × p da + (1 - λ) × p rt where: p ref is the regional reliability reference standard value, p da , p rt are respectively the day-ahead electric energy marginal standard value and the real-time electric energy marginal standard value of the region, λ is the adjustment parameter, and its value range is from 0 to 1; A53: When the regional reliability reference value is lower than or equal to the regional reliability enforcement value, no operation is required. However, when the regional reliability reference value is higher than the regional reliability enforcement value, i.e., p ref > p strike , calculate the result of the price difference refund for all power generation capacity suppliers. The calculation formula is as follows: Wherein: is the return price difference that the u-th power generation capacity provider in the reliable power generation capacity within the region needs to pay to the region; is the return price difference that the m-th power generation capacity provider in the inter-regional reliable power generation capacity under the inter-regional transmission channel i related to the region needs to pay to the region; A54: If during the peak load period of the region, there is a situation of insufficient generation capacity where the generation capacity of all generation capacity supply entities related to the region is unavailable or unable to provide power according to the cleared generation capacity, then the generation capacity supply entity not only cannot obtain the electric energy revenue but also needs to pay the return price difference as a penalty, thereby effectively enhancing the willingness of all generation capacity supply entities to generate electricity during the peak load period in the region, and summarizing the settlement results of reliable generation capacity between regions and within regions.

7. An inter - regional and intra - regional reliability power generation capacity coordinated clearing and settlement system, characterized in that, Used to implement the inter-regional and intra-regional reliable generation capacity coordinated clearing and settlement method described in any one of claims 1 to 6, including: The first calculation module is used to perform optimized clearing on the demand-side information of the generation capacity demand entities and the supply-side information of the generation capacity supply entities in each region to obtain the pre-clearing result of reliable generation capacity in each region; The analysis module is used to analyze the pre-clearing result of reliable generation capacity in each region to obtain the generation capacity adequacy situation in each region, and then determine the inter-regional reliable generation capacity information in each region according to the generation capacity adequacy situation in each region; The second calculation module is used to perform multi-channel centralized optimized clearing on the inter-regional reliable generation capacity by combining the inter-regional reliable generation capacity information in each region and the ATC constraints of each transmission channel between regions to obtain the clearing result of inter-regional reliable generation capacity and the settlement result of inter-regional reliable generation capacity guarantee; The third calculation module is used to perform final optimized clearing on the reliable generation capacity in each region with the clearing result of inter-regional reliable generation capacity as the boundary to obtain the final clearing result of reliable generation capacity in each region and the settlement result of reliable generation capacity guarantee in each region; The settlement module is used to combine the clearing results of reliable power generation capacity between regions, the final clearing results of reliable power generation capacity within each region, the execution information and reference information of reliable power generation capacity in each region, determine the refund price difference results of all power generation capacity supply entities, and determine the power generation capacity shortage penalty results based on the actual power generation capacity supply situation of all power generation capacity supply entities, so as to obtain the settlement results of reliable power generation capacity between regions and within regions.

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