Dispatch Method and System for Self-Supported Power Plants Based on Responsibility Liaison Line Assessment Mechanism

Abstract

This invention discloses a dispatching method and system for self-owned power plants based on a responsibility tie-line assessment mechanism. The method includes: acquiring the actual output curve of the self-owned power plant, calculating the equivalent actual output curve, and obtaining the actual grid connection and disconnection data of the self-owned power plant; establishing an expected revenue model for the self-owned power plant based on the grid connection and disconnection price composition; establishing a responsibility tie-line assessment mechanism for the self-owned power plant based on the actual grid connection and disconnection data and AGC grid connection and disconnection dispatch instructions; conducting a case study analysis based on the historical grid connection and disconnection data of the example power plant following AGC dispatch instructions, combined with the expected revenue model of the self-owned power plant and the specific classification scheme of the responsibility tie-line assessment mechanism; and performing a comprehensive benefit analysis on the changes in the revenue of various stakeholders after implementing the responsibility tie-line assessment mechanism. This invention provides targeted compensation and assessment schemes, reducing assessment costs while greatly improving the enthusiasm of self-owned power plants to participate in grid dispatch, which can effectively promote the level of new energy consumption.

Description

Technical Field

[0001] This invention belongs to the field of power system energy storage and power planning technology, and relates to a dispatching method and system for self-owned power plants based on a responsibility tie-line assessment mechanism. Background Technology

[0002] With the goal of "peak carbon and carbon neutrality" being proposed, the proportion of renewable energy installed capacity in the new power system is constantly increasing. On the one hand, due to the randomness, volatility, and unpredictability of renewable energy, large-scale grid connection requires the power system to have flexible and rapid response capabilities. On the other hand, with industrial restructuring, low-carbon energy transformation, and continuous improvement in people's living standards, the power generation and load levels of renewable energy are showing rapid growth, and the power grid faces the dual pressure of ensuring renewable energy absorption and power supply. As the construction of the new power system with renewable energy as the main body deepens, the repeated interplay of insufficient renewable energy absorption capacity and tight power supply and demand will become the norm for power grid operation. Therefore, it is urgent to fully explore the flexible adjustment potential of existing power grid resources to meet the power grid operation needs during the transition period of the new power system construction.

[0003] Self-owned power plants encompass both generating capacity and auxiliary load, and possess a certain degree of grid regulation capability, allowing them to participate in the electricity market and ancillary services market as a modifiable resource. However, the current performance evaluation mechanism for self-owned power plants presents them with the risk of economic loss when participating in grid regulation, and also results in a situation where the benefits of their participation in grid regulation are disproportionate to their expenditures. These issues lead to low enthusiasm among self-owned power plants to participate in grid regulation, resulting in insufficient grid peak-shaving capacity and hindering the promotion of renewable energy consumption. Summary of the Invention

[0004] Based on the above problems, this invention proposes a dispatching method and system for self-owned power plants based on a responsibility tie-line assessment mechanism. This method deeply analyzes the composition and assessment mechanism of grid connection and grid connection prices for self-owned power plants, establishes an optimization model of expected revenue for self-owned power plants participating in grid dispatch by combining the assessment of the "two detailed rules" of the ancillary services market, and proposes a responsibility tie-line assessment mechanism for self-owned power plants based on the optimization results of actual calculation examples.

[0005] To achieve the above objectives, the present invention employs the following technical solution:

[0006] A dispatching method for self-owned power plants based on a responsibility tie-line assessment mechanism, comprising:

[0007] Obtain the actual output curve of the self-owned power plant, calculate the equivalent actual output curve, and then obtain the actual grid connection data of the self-owned power plant.

[0008] Based on the composition of on-grid and off-grid electricity prices for self-owned power plants, establish an expected revenue model for self-owned power plants;

[0009] Based on the actual grid connection data and AGC grid connection dispatch instructions of the self-owned power plant, establish a responsibility communication line assessment mechanism for the self-owned power plant.

[0010] Based on the historical grid connection data of the power plant in the case study, which follows the AGC dispatch instructions, and combined with the expected revenue model of the self-owned power plant and the specific classification scheme of the responsibility tie line assessment mechanism, a case study analysis was carried out. A comprehensive benefit analysis was also conducted on the changes in the revenue of various stakeholders after the implementation of the responsibility tie line assessment mechanism.

[0011] As a further improvement of the present invention, the on-grid and off-grid electricity prices of the self-owned power plant are composed of:

[0012] The on-grid electricity price for self-owned power plants is composed as follows:

[0013] On-grid electricity price of coal-fired self-owned power plants Benchmark feed-in tariffs are generally adopted in all cases;

[0014] The on-grid tariff for self-owned power plants includes the basic tariff, the electricity price per unit, and the power regulation fee; the composition of the on-grid tariff for self-owned power plants is as follows:

[0015] (1)

[0016] In the formula: The off-grid electricity price; The basic electricity price; Electricity price per unit; To adjust electricity prices;

[0017] Among them, the basic electricity price This includes two scenarios: billing based on maximum demand and billing based on transformer capacity. Billing based on maximum demand is settled based on the maximum monthly electricity demand.

[0018] Electricity price The electricity purchase price is settled monthly; the transaction price is settled based on the actual transaction price.

[0019] Adjusting electricity prices Calculated based on the power factor measured by the self-owned power plant.

[0020] As a further improvement of the present invention, the establishment of the expected revenue model for a self-owned power plant includes:

[0021] Establish a linear programming model with the expected revenue of the self-owned power plant as the objective, and the objective function is:

[0022] (2)

[0023] Constraints:

[0024] (3)

[0025] (4)

[0026] (5)

[0027] (6)

[0028] Among them, the objective function is to minimize the absolute value of the deviation between the total profit and loss of the self-owned power plant and the expected profit and loss; Total profit and loss of self-owned power plants The expected profit or loss of the self-owned power plant; For the total compensation cost, The total price difference resulted in a loss. Costs for demand assessment;

[0029] The constraint is the bandwidth of the optimization variable. Offset electricity compensation price and the price of compensation for unoffset electricity consumption The range of values ​​for .

[0030] As a further improvement of the present invention, the self-owned power plant responsibility connection assessment mechanism includes:

[0031] Based on the grid AGC dispatch instructions and the actual on-grid and off-grid power of the self-owned power plant, the following assessment mechanism for the equivalent responsibility tie line of the self-owned power plant is designed:

[0032]

[0033]

[0034]

[0035] In the formula: These are equivalent to network access and disconnection commands; To schedule AGC commands; For the plant's own power plant load; This refers to the actual power output and the power consumption at the grid. This represents the actual power load of the self-owned power plant. For the purpose of establishing a contact line of responsibility;

[0036] When the calculation result is greater than zero, it is considered online; when it is less than zero, it is considered offline. The bandwidth for the responsibility connection line assessment is determined with reference to the AGC assessment.

[0037] As a further improvement of the present invention, the establishment of a responsibility communication line assessment mechanism for self-owned power plants based on actual grid connection data and AGC grid connection scheduling instructions includes:

[0038] Based on actual grid connection data and AGC grid connection dispatch instructions from self-owned power plants, this paper proposes equivalent AGC grid connection instructions and equivalent actual grid disconnection power applicable to the responsibility tie line assessment mechanism; according to the different levels of equivalent grid connection power following equivalent AGC grid connection instructions, this paper proposes calculation methods for offsetting power, price difference power and demand assessment under various conditions.

[0039] Based on actual grid disconnection data from self-owned power plants and AGC grid disconnection dispatch instructions, this paper proposes equivalent AGC grid disconnection instructions and equivalent actual grid disconnection power suitable for the responsibility tie-line assessment mechanism. According to the different levels of equivalent grid disconnection power following equivalent AGC grid disconnection instructions, this paper proposes calculation methods for offsetting power, price difference power, and demand assessment under various conditions.

[0040] As a further improvement of the present invention, the classification according to the different levels of equivalent Internet access power following equivalent AGC Internet access commands is specifically divided into:

[0041] Scenario 1: If the actual output of the self-owned power plant is within the bandwidth of the AGC dispatch command, then the actual output of the self-owned power plant will be fully included in the offset power portion for settlement.

[0042] Scenario 2: Insufficient grid connection capacity of self-owned power plants; In this case, self-owned power plants bear both the AGC assessment and the grid connection price difference loss. At the same time, compensation is given proportionally based on the self-owned power plants' execution of AGC instructions.

[0043] Scenario 3: The amount of electricity generated by the self-owned power plant exceeds the AGC command bandwidth. In this case, the actual output of the self-owned power plant will be decomposed. The portion of electricity within the AGC bandwidth will be included in the compensation electricity, while the portion exceeding the bandwidth will bear both the AGC assessment and the loss from the grid connection price difference.

[0044] Scenario 4: Self-owned power plants fail to effectively implement AGC (Automatic Guided Vehicle) grid connection instructions; in this case, the self-owned power plant will bear both the AGC assessment and the grid connection price difference loss, without compensation.

[0045] As a further improvement of the present invention, the classification according to the equivalent offline power following the equivalent AGC offline command at different levels is specifically divided into:

[0046] Scenario 1: If the actual electricity output from the self-owned power plant is within the AGC dispatch instruction bandwidth, then all the electricity output from the self-owned power plant will be included in the offset electricity portion for settlement.

[0047] Scenario 2: Insufficient grid connection capacity of self-owned power plants; In this case, self-owned power plants simultaneously bear the burden of AGC assessment, grid connection price difference losses, and maximum demand assessment.

[0048] Scenario 3: The amount of electricity discharged from the self-owned power plant exceeds the AGC command bandwidth. In this case, the actual amount of electricity discharged from the self-owned power plant will be decomposed. The amount of electricity within the AGC bandwidth will be included in the compensation amount. The amount exceeding the bandwidth will bear the responsibility for AGC assessment, the loss from the price difference between the discharged electricity and the maximum demand assessment.

[0049] Scenario 4: Self-owned power plants fail to effectively implement AGC (Automatic Guided Vehicle) grid disconnection instructions; in this case, the self-owned power plant will simultaneously bear the AGC assessment, grid disconnection price difference loss, and demand assessment, without compensation.

[0050] As a further improvement to the present invention, after establishing the assessment mechanism for the responsibility connection line of self-owned power plants, it also includes:

[0051] The feasibility of the proposed responsibility linkage assessment mechanism is verified by analyzing the measured data from the power plant in the case study.

[0052] As a further improvement to the present invention, the specific classification scheme of the self-owned power plant expected revenue model and responsibility tie line assessment mechanism is used to conduct a calculation example analysis, including:

[0053] The equivalent AGC assessment bandwidth and the scope of offset power compensation are determined by combining the expected revenue optimization model of the self-owned power plant.

[0054] A dispatching system for self-owned power plants based on a responsibility liaison line assessment mechanism includes:

[0055] The curve acquisition module is used to acquire the actual output curve of the self-owned power plant, calculate the equivalent actual output curve, and then obtain the actual grid connection data of the self-owned power plant.

[0056] The model building module is used to build an expected revenue model for self-owned power plants based on the composition of on-grid and off-grid electricity prices.

[0057] The mechanism establishment module is used to establish a responsibility connection line assessment mechanism for self-owned power plants based on the actual grid connection data and AGC grid connection and dispatch instructions of the self-owned power plants.

[0058] The benefit analysis module is used to conduct case study analysis based on the historical grid connection and outgoing data of the power plant in the case study, following the AGC dispatch instructions, and in conjunction with the expected revenue model of the self-owned power plant and the specific classification scheme of the responsibility tie line assessment mechanism. It also conducts a comprehensive benefit analysis on the changes in the revenue of various stakeholders after the implementation of the responsibility tie line assessment mechanism.

[0059] Compared with the prior art, the present invention has the following beneficial effects:

[0060] This invention, aiming at renewable energy consumption and power supply security, proposes a novel responsibility tie-line assessment mechanism to enhance the enthusiasm of self-owned power plants in participating in grid dispatch. This mechanism can serve as a basis for designing a grid assessment and management mechanism for self-owned power plants. Based on this responsibility tie-line assessment mechanism, and considering both the self-owned power plant's own revenue and renewable energy consumption, this invention addresses the problems existing in the current self-owned power plant assessment mechanism. Combining the resource structure and electricity price composition of self-owned power plants, it proposes assessment and compensation mechanisms suitable for self-owned power plants' participation in grid connection and off-grid regulation. This addresses current issues such as low enthusiasm of self-owned power plants in grid dispatch, unclear revenue distribution from ancillary services provided by self-owned power plants, and insufficient grid peak-shaving capacity. The proposed responsibility tie-line assessment mechanism for self-owned power plants aims to improve their enthusiasm for participating in grid peak-shaving and promote renewable energy consumption. This invention conducts a comprehensive benefit analysis on the changes in revenue for different market entities after the implementation of the responsibility tie line assessment mechanism. It can be concluded that the responsibility tie line assessment mechanism for self-owned power plants can effectively improve the efficiency of self-owned power plants, increase their enthusiasm for participating in grid dispatch, promote the consumption of new energy and the safe and stable operation of the grid, and all market entities can benefit from the implementation of the mechanism.

[0061] Furthermore, this invention proposes an optimization model for the expected revenue of self-owned power plants. By setting different expected revenues, the optimal solutions for the equivalent AGC assessment bandwidth and compensation price under each expected revenue can be obtained, providing a reference for the power grid to finally determine the assessment and compensation scope.

[0062] Furthermore, based on the current grid-connected electricity pricing model, this invention proposes a responsibility tie-line assessment mechanism for self-owned power plants. The calculation results show that the responsibility tie-line assessment mechanism proposed in this invention can significantly reduce the demand assessment cost of self-owned power plants, while effectively improving the economic benefits of self-owned power plants by setting reasonable equivalent AGC assessment bandwidth and compensation. Attached Figure Description

[0063] Figure 1 This is a framework diagram of the assessment mechanism for the equivalent responsibility linkage line of self-owned power plants;

[0064] Figure 2 This is a schematic diagram illustrating the situation where a self-owned power plant follows the AGC's grid connection instructions.

[0065] Figure 3 This is a schematic diagram illustrating the situation where a self-owned power plant follows the AGC's offline command.

[0066] Figure 4 This is a schematic diagram of the sensitivity analysis of total profit and loss from January to April under different assessment bandwidths;

[0067] Figure 5 This is a schematic diagram illustrating the sensitivity analysis of the average monthly profit and loss and average monthly compensation of a self-owned power plant as a function of the compensation for unoffset electricity.

[0068] Figure 6 This invention relates to a dispatching system for self-owned power plants based on a responsibility liaison line assessment mechanism.

[0069] Figure 7 This is a schematic diagram of an electronic device according to the present invention. Detailed Implementation

[0070] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0071] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0072] The purpose of this invention is to design a novel responsibility tie-line assessment mechanism. Starting from the perspectives of the self-owned power plant's own revenue and renewable energy consumption, and addressing the problems existing in the current assessment mechanism for self-owned power plants, this invention proposes assessment and compensation mechanisms suitable for self-owned power plants' participation in grid connection and off-grid regulation, taking into account the resource structure and electricity price composition of self-owned power plants. This addresses issues such as the current low enthusiasm of self-owned power plants to participate in grid dispatch, unclear revenue distribution for ancillary services provided by self-owned power plants, and insufficient grid peak-shaving capacity. For the first time, a responsibility tie-line assessment mechanism for self-owned power plants is designed to achieve the goals of improving the enthusiasm of self-owned power plants to participate in grid peak-shaving and promoting renewable energy consumption.

[0073] The technical solution adopted in this invention is based on the composition of the electricity price for self-owned power plants participating in grid on-grid regulation and their compliance with AGC dispatch instructions. According to the equivalent output of the self-owned power plant's responsibility tie line and the equivalent AGC dispatch instructions, a responsibility tie line assessment mechanism is proposed, specifically implemented according to the following steps:

[0074] Step 1: Conduct an in-depth analysis of the composition and revenue of self-owned power plants participating in grid connection and off-grid regulation, and propose an optimization model for the expected revenue of self-owned power plants.

[0075] Step 2: Based on the actual grid connection data and AGC grid connection dispatch instructions from self-owned power plants, propose equivalent AGC grid connection instructions and equivalent actual grid connection power suitable for the responsibility tie-line assessment mechanism. Divide the equivalent grid connection power into four categories according to different levels of the equivalent AGC grid connection instructions, and propose methods for calculating offsetting electricity and price difference electricity in each category. Combined with the self-owned power plant expected revenue optimization model from Step 1, determine the equivalent AGC assessment bandwidth and offsetting electricity compensation range for the responsibility tie-line assessment mechanism.

[0076] Step 3: Based on the actual grid connection data of self-owned power plants and AGC grid connection dispatch instructions, propose equivalent AGC grid connection instructions and equivalent actual grid connection power suitable for the responsibility tie-line assessment mechanism. Divide the equivalent grid connection power into four categories according to different levels of the equivalent AGC grid connection instructions, and propose calculation methods for offset electricity, price difference electricity, and demand assessment under each category. Combined with the self-owned power plant expected revenue optimization model from Step 1, determine the equivalent AGC assessment bandwidth and offset electricity compensation range of the responsibility tie-line assessment mechanism.

[0077] Step 4: Based on the historical grid connection data of Jinyang Power Plant from January to April following AGC dispatch instructions, and combined with the expected revenue model of self-owned power plants in Step 1 and the specific classification scheme of the responsibility liaison line assessment mechanism in Steps 2 and 3, a case study analysis is carried out, and a comprehensive benefit analysis is conducted on the changes in the revenue of various stakeholders after the implementation of the mechanism.

[0078] Step 1 specifically involves:

[0079] Step 1.1, the on-grid tariff composition of self-owned power plants is as follows: Currently, the on-grid tariff for coal-fired self-owned power plants... Benchmark on-grid tariffs are generally adopted in all regions. Taking Shaanxi Province as an example, according to the "Notice of Shaanxi Provincial Price Bureau on Issues Related to the Management of On-grid Tariffs in the Province" (Shaanxi Price and Commerce Document

[2017] No. 67), the on-grid tariff for self-owned power plants in Shaanxi is currently set at RMB 0.2693 / kWh (including tax).

[0080] Step 1.2: The composition of the grid-connected electricity price for self-owned power plants is relatively complex, and the implementation standards vary from region to region. However, the basic components mainly include the basic electricity price, the electricity consumption price, and the power regulation fee. Taking Shaanxi Province as an example, the grid-connected electricity price for self-owned power plants in Shaanxi Province follows the price for electricity used in large industrial production, and its main components are as follows:

[0081] (1)

[0082] In the formula: The off-grid electricity price; The basic electricity price; Electricity price per unit; To adjust electricity prices.

[0083] Among them, the basic electricity price There are two types of billing: billing based on maximum demand and billing based on transformer capacity. Billing based on maximum demand is settled based on the maximum monthly electricity demand, currently at RMB 31 / kW·month for self-owned power plants in Shaanxi Province; billing based on transformer capacity is RMB 22 / kVA·month.

[0084] Electricity price The electricity purchase price (including the transaction price and transmission and distribution price) is settled monthly. The transmission and distribution price follows the standard electricity price for large industrial users. Currently, in Shaanxi Province, self-owned power plants settle accounts at RMB 0.0604 / kWh for 330 kV, RMB 0.0654 / kWh for 110 kV, and RMB 0.0854 / kWh for 35 kV, which also includes government funds and surcharges of approximately RMB 0.04 / kWh. The transaction price is settled based on the actual transaction price.

[0085] Adjusting electricity prices According to the power factor measured by the self-owned power plant, if the power factor is higher or lower than the standard (0.8 / 0.85 / 0.9), the electricity fee shall be increased or decreased in accordance with the provisions of the "Power Factor Adjustment Electricity Fee Method".

[0086] Step 1.3, following the principle of "focusing on innovative electricity pricing mechanisms and supplementing with ancillary services," the core idea is to construct an electricity pricing settlement mechanism based primarily on responsibility-based tie lines. Based on the grid AGC dispatch instructions and the actual on-grid and off-grid power of self-owned power plants, the equivalent responsibility-based tie line assessment mechanism for self-owned power plants is designed as follows:

[0087] (2)

[0088] (3)

[0089] (4)

[0090] In the formula: These are equivalent to network access and disconnection commands; To schedule AGC commands; For the plant's own power plant load; This refers to the actual power output and the power consumption at the grid. This represents the actual power load of the self-owned power plant. This serves as a contact line for responsibility.

[0091] In the above formula, a result greater than zero indicates grid connection, and a result less than zero indicates grid disconnection. The assessment bandwidth for the responsibility tie line is determined by referring to the AGC assessment in the "Dual Rules," accounting for 2%-5% of the assessment bandwidth. The grid connection and disconnection of electricity are defined according to the responsibility tie line, not the physical tie line, reflecting the connection between the self-owned power plant's execution of dispatch instructions and its profit and loss. The framework of the self-owned power plant's equivalent responsibility tie line assessment mechanism is as follows: Figure 1As shown.

[0092] Step 1.4: Establish a linear programming model with the expected revenue of the self-owned power plant as the objective. The situation of the self-owned power plant following AGC is still included in the existing "dual rules" management.

[0093] Objective function:

[0094] (2)

[0095] Constraints:

[0096] (3)

[0097] (4)

[0098] (5)

[0099] (6)

[0100] The objective function is to minimize the absolute value of the deviation between the total profit and loss of the self-owned power plant and the expected profit and loss. Total profit and loss of self-owned power plants The expected profit or loss of the self-owned power plant. For the total compensation cost, The total price difference resulted in a loss. Costs are for demand assessment.

[0101] The constraint is the bandwidth of the optimization variable. Offset electricity compensation price and the price of compensation for unoffset electricity consumption The range of values ​​for is given. The optimal solution is the point where the profit / loss deviation is minimized. Based on the above model, the optimal solution values ​​for various expected returns of self-owned power plants can be calculated.

[0102] Step 2 specifically involves: based on the responsibility tie-line assessment mechanism and expected revenue model of self-owned power plants in Step 1, proposing equivalent AGC grid connection instructions and equivalent actual grid disconnection power applicable to the responsibility tie-line assessment mechanism. According to the different levels of equivalent grid connection power following the equivalent AGC grid connection instructions, four categories are categorized, and calculation methods for offsetting electricity, price difference electricity, and demand assessment are proposed for each category.

[0103] Step 2 specifically involves:

[0104] Scenario 1: If the actual output of the self-owned power plant is within the bandwidth of the AGC dispatch command, then the actual output of the self-owned power plant will be fully included in the offset power portion for settlement.

[0105] Scenario 2: Insufficient grid connection capacity of self-owned power plants. In this case, the self-owned power plant bears both the AGC assessment and the grid connection price difference loss. At the same time, compensation is provided proportionally based on the self-owned power plant's execution of AGC instructions; among which, the AGC assessment fee is implemented in accordance with the assessment rules of the "two detailed rules".

[0106] Scenario 3: The electricity output of the self-owned power plant exceeds the AGC command bandwidth. In this case, the actual output of the self-owned power plant will be broken down. The portion of the electricity output within the AGC bandwidth will be included in the compensation electricity, while the portion exceeding the bandwidth will bear both the AGC assessment and the loss from the grid connection price difference.

[0107] Scenario 4: The self-owned power plant fails to effectively implement the AGC (Automatic Guided Vehicle) grid connection instruction. In this case, the self-owned power plant will bear both the AGC assessment and the grid connection price difference loss, without compensation.

[0108] Step 3 specifically involves: based on the responsibility tie-line assessment mechanism and expected revenue model of self-owned power plants in Step 1, proposing equivalent AGC grid disconnection instructions and equivalent actual grid disconnection power applicable to the responsibility tie-line assessment mechanism. According to the different levels of equivalent grid disconnection power following the equivalent AGC grid disconnection instructions, four categories are categorized, and calculation methods for offsetting electricity, price difference electricity, and demand assessment are proposed for each category.

[0109] Step 3 specifically involves:

[0110] Scenario 1: If the actual electricity output from the self-owned power plant is within the AGC dispatch instruction bandwidth, then all the electricity output from the self-owned power plant will be included in the offset electricity portion for settlement.

[0111] Scenario 2: Insufficient grid connection capacity of self-owned power plants. In this case, self-owned power plants simultaneously bear the burden of AGC assessment, grid connection price difference losses, and maximum demand assessment; among them, the AGC assessment fee is implemented in accordance with the assessment rules of the "two detailed rules";

[0112] Scenario 3: The amount of electricity discharged from the self-owned power plant exceeds the AGC command bandwidth. In this case, the actual amount of electricity discharged from the self-owned power plant will be broken down. The portion of electricity within the AGC bandwidth will be included in the compensation volume. The portion exceeding the bandwidth will simultaneously bear the burden of AGC assessment, the loss from the discharge price difference, and the maximum demand assessment.

[0113] Scenario 4: The self-owned power plant fails to effectively implement the AGC (Automatic Guided Collection) grid disconnection instruction. In this case, the self-owned power plant will simultaneously bear the AGC assessment, the grid disconnection price difference loss, and the demand assessment, without compensation.

[0114] Step 4 specifically involves analyzing the measured data from the example power plant to verify the feasibility of the proposed responsibility linkage assessment mechanism.

[0115] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0116] This invention, based on the participation of self-owned power plants in grid on / off tariff structure and their compliance with AGC dispatch instructions, proposes a responsibility tie-line assessment mechanism according to the equivalent output and equivalent AGC dispatch instructions of the self-owned power plant's responsibility tie-line. The process is as follows: Figure 1 As shown, the specific steps are as follows:

[0117] Step 1 is to analyze the composition of on-grid and off-grid electricity prices for self-owned power plants and establish an expected revenue model for self-owned power plants.

[0118] Step 1.1, the on-grid tariff composition of self-owned power plants is as follows: Currently, the on-grid tariff for coal-fired self-owned power plants... Benchmark on-grid tariffs are generally adopted in all regions. Taking Shaanxi Province as an example, according to the "Notice of Shaanxi Provincial Price Bureau on Issues Related to the Management of On-grid Tariffs in the Province", the on-grid tariff for self-owned power plants in Shaanxi is currently set at 0.2693 yuan / kWh (including tax).

[0119] Step 1.2: The composition of the grid-connected electricity price for self-owned power plants is relatively complex, and the implementation standards vary from region to region. However, the basic components mainly include the basic electricity price, the electricity consumption price, and the power regulation fee. Taking Shaanxi Province as an example, the grid-connected electricity price for self-owned power plants in Shaanxi Province follows the price for electricity used in large industrial production, and its main components are as follows:

[0120] (1)

[0121] In the formula: The off-grid electricity price; The basic electricity price; Electricity price per unit; To adjust electricity prices.

[0122] Among them, the basic electricity price There are two types of billing: billing based on maximum demand and billing based on transformer capacity. Billing based on maximum demand is settled based on the maximum monthly electricity demand, currently at RMB 31 / kW·month for self-owned power plants in Shaanxi Province; billing based on transformer capacity is RMB 22 / kVA·month.

[0123] Electricity price The electricity purchase price (including the transaction price and transmission and distribution price) is settled monthly. The transmission and distribution price follows the standard electricity price for large industrial users. Currently, in Shaanxi Province, self-owned power plants settle accounts at RMB 0.0604 / kWh for 330 kV, RMB 0.0654 / kWh for 110 kV, and RMB 0.0854 / kWh for 35 kV, which also includes government funds and surcharges of approximately RMB 0.04 / kWh. The transaction price is settled based on the actual transaction price.

[0124] Adjusting electricity prices According to the power factor measured by the self-owned power plant, if the power factor is higher or lower than the standard (0.8 / 0.85 / 0.9), the electricity fee shall be increased or decreased in accordance with the provisions of the "Power Factor Adjustment Electricity Fee Method".

[0125] Step 1.3, following the principle of "focusing on innovative electricity pricing mechanisms and supplementing with ancillary services," the core idea is to construct an electricity pricing settlement mechanism based primarily on responsibility-based tie lines. Based on the grid AGC dispatch instructions and the actual on-grid and off-grid power of self-owned power plants, the equivalent responsibility-based tie line assessment mechanism for self-owned power plants is designed as follows:

[0126] (2)

[0127] (3)

[0128] (4)

[0129] In the formula: These are equivalent to network access and disconnection commands; To schedule AGC commands; For the plant's own power plant load; This refers to the actual power output and the power consumption at the grid. This represents the actual power load of the self-owned power plant. This serves as a contact line for responsibility.

[0130] In the above formula, a result greater than zero indicates grid connection, and a result less than zero indicates grid disconnection. The assessment bandwidth for the responsibility tie line is determined by referring to the AGC assessment in the "Dual Rules," accounting for 2%-5% of the assessment bandwidth. The grid connection and disconnection of electricity are defined according to the responsibility tie line, not the physical tie line, reflecting the connection between the self-owned power plant's execution of dispatch instructions and its profit and loss. The framework of the self-owned power plant's equivalent responsibility tie line assessment mechanism is as follows: Figure 1 As shown.

[0131] Step 1.4: Establish a linear programming model with the expected revenue of the self-owned power plant as the objective. The situation of the self-owned power plant following AGC is still included in the existing "dual rules" management.

[0132] Objective function:

[0133] (2)

[0134] Constraints:

[0135] (3)

[0136] (4)

[0137] (5)

[0138] (6)

[0139] The objective function is to minimize the absolute value of the deviation between the total profit and loss of the self-owned power plant and the expected profit and loss. Total profit and loss of self-owned power plants The expected profit or loss of the self-owned power plant. For the total compensation cost, The total price difference resulted in a loss. Costs are for demand assessment.

[0140] The constraint is the bandwidth of the optimization variable. Offset electricity compensation price and the price of compensation for unoffset electricity consumption The range of values ​​for is given. The optimal solution is the point where the profit-loss deviation is minimized. Based on the above model, the optimal solution values ​​for various expected returns of self-owned power plants can be calculated. The optimal solutions for self-owned power plants under various expected returns are shown in Table 1.

[0141] Table 1 Optimal solution values ​​for various expected returns

[0142]

[0143] Step 2 involves proposing equivalent AGC on-grid commands and equivalent actual off-grid power suitable for the responsibility tie-line assessment mechanism, based on actual on-grid data from self-owned power plants and AGC on-grid dispatch instructions. Four categories are categorized according to the different levels of equivalent on-grid power following the equivalent AGC on-grid commands, and calculation methods for offsetting power, price difference power, and demand assessment are proposed for each category. When the equivalent AGC dispatch instruction is an on-grid command, self-owned power plants can be divided into four categories based on their actual output characteristics following the AGC on-grid command, such as... Figure 2 As shown.

[0144] Scenario 1: If the actual output of the self-owned power plant is within the bandwidth of the AGC dispatch command, then the actual output of the self-owned power plant will be fully included in the offset power portion for settlement.

[0145] Scenario 2: Insufficient grid connection capacity of self-owned power plants. In this case, the self-owned power plant bears both the AGC assessment and the grid connection price difference loss. At the same time, compensation is provided proportionally based on the self-owned power plant's execution of AGC instructions; among which, the AGC assessment fee is implemented in accordance with the assessment rules of the "two detailed rules".

[0146] Scenario 3: The electricity output of the self-owned power plant exceeds the AGC command bandwidth. In this case, the actual output of the self-owned power plant will be broken down. The portion of the electricity output within the AGC bandwidth will be included in the compensation electricity, while the portion exceeding the bandwidth will bear both the AGC assessment and the loss from the grid connection price difference.

[0147] Scenario 4: The self-owned power plant fails to effectively implement the AGC (Automatic Guided Vehicle) grid connection instruction. In this case, the self-owned power plant will bear both the AGC assessment and the grid connection price difference loss, without compensation.

[0148] The specific assessment methods for each type of situation are shown in Table 2:

[0149] Table 2. Online Compensation and Assessment Results for the Responsibility Liaison Line Assessment Mechanism

[0150]

[0151] in, . This is the equivalent internet access command for AGC. , , , These represent the equivalent grid-connected electricity volume of the self-owned power plant under each scenario. The offsetting electricity volume is the electricity volume that the self-owned power plant can offset within a designated area or bandwidth range following AGC instructions; the price difference electricity volume is the electricity volume that the self-owned power plant must bear the price difference for outside the designated area or bandwidth range when executing AGC commands.

[0152] Step 3 involves proposing an equivalent AGC grid disconnection command and equivalent actual grid disconnection power suitable for the responsibility tie-line assessment mechanism, based on the actual grid disconnection data of the self-owned power plant and the AGC grid disconnection dispatch instructions. Four categories are categorized according to the different levels of the equivalent grid disconnection power following the equivalent AGC grid disconnection command, and calculation methods for offsetting power, price difference power, and demand assessment are proposed for each category. When the equivalent AGC dispatch instruction is a grid disconnection command, the self-owned power plant can be divided into four categories based on the different actual output characteristics following the AGC grid disconnection command, such as... Figure 3 As shown.

[0153] Scenario 1: If the actual electricity output from the self-owned power plant is within the AGC dispatch instruction bandwidth, then all the electricity output from the self-owned power plant will be included in the offset electricity portion for settlement.

[0154] Scenario 2: Insufficient grid connection capacity of self-owned power plants. In this case, self-owned power plants simultaneously bear the burden of AGC assessment, grid connection price difference losses, and maximum demand assessment; among them, the AGC assessment fee is implemented in accordance with the assessment rules of the "two detailed rules";

[0155] Scenario 3: The amount of electricity discharged from the self-owned power plant exceeds the AGC command bandwidth. In this case, the actual amount of electricity discharged from the self-owned power plant will be broken down. The portion of electricity within the AGC bandwidth will be included in the compensation volume. The portion exceeding the bandwidth will simultaneously bear the burden of AGC assessment, the loss from the discharge price difference, and the maximum demand assessment.

[0156] Scenario 4: The self-owned power plant fails to effectively implement the AGC (Automatic Guided Collection) grid disconnection instruction. In this case, the self-owned power plant will simultaneously bear the AGC assessment, the grid disconnection price difference loss, and the demand assessment, without compensation.

[0157] The specific assessment methods for each type of situation are shown in Table 3:

[0158] Table 3 Compensation and Assessment Results for the Responsibility Liaison Line Assessment Mechanism

[0159]

[0160] in, . This is the equivalent of the AGC (Automatic Guided Service) shutdown command. , , , These represent the equivalent off-grid electricity volume of the self-owned power plant under each scenario.

[0161] Step 4 is to analyze the data from the actual measured data of the power plant in the example to verify the feasibility of the proposed responsibility connection line assessment mechanism.

[0162] Step 4.1: First, we study the changes in total profit and loss from January to April under different equivalent AGC assessment bandwidths, taking this as an example. Figure 4 As can be seen, the power plant's total profitability increases accordingly with the expansion of the assessment bandwidth. When the bandwidth is less than 4%, the power plant is highly sensitive to bandwidth limitations; further reducing the bandwidth will result in significant losses. Excessively high bandwidth leads to higher compensation costs. Setting the bandwidth to around 5% allows the power plant to essentially break even, consistent with the optimization results in step 1.

[0163] Step 4.2: The fixed equivalent AGC assessment bandwidth is 5%. The offset portion between online and offline power generation is compensated at RMB 0.046 / kWh. The compensation price for the unoffset electricity is calculated traversally. As shown in Table 4, the revenue of the self-owned power plant increases with the increase of the compensation price. The revenue reaches the break-even point when the price is in the range of RMB 0.08-0.12 / kWh. At this time, the average monthly compensation cost is about RMB 4.8-6.8 million.

[0164] Table 4. Impact of Unoffset Electricity Compensation Prices on Average Monthly Profit and Loss and Compensation of Self-owned Power Plants

[0165]

[0166] Step 4.3, Sensitivity analysis of monthly average profit and loss and monthly average compensation of self-owned power plants with respect to unoffset electricity compensation as follows: Figure 5 As shown.

[0167] Step 4.4: Compared with the traditional assessment based on the maximum demand of the grid, the responsibility liaison line assessment mechanism, which assesses based on the maximum deviation from the grid, can significantly reduce the assessment cost of the power plant's maximum demand. As shown in Table 5, except for the case in March where the self-owned power plant followed the AGC instructions well, the monthly reduction in assessment cost is more than 5 million yuan.

[0168] In summary, the responsibility linkage assessment mechanism for self-owned power plants, by detailing various situations of self-owned power plants going up and down the grid, and providing targeted compensation and assessment schemes, reduces assessment costs while greatly improving the enthusiasm of self-owned power plants to participate in grid dispatch.

[0169] Table 5. Analysis of how the responsibility-based contact line assessment mechanism can reduce demand assessment costs.

[0170]

[0171] Step 4.5 conducted a comprehensive benefit analysis of the revenue changes after implementing the responsibility tie-line assessment mechanism for self-owned power plants for various market entities. For government agencies such as the National Development and Reform Commission and the National Energy Administration, the funds and surcharges collected for self-consumption and grid-connected electricity were unaffected, and grid connection of self-owned power plants can effectively participate in renewable energy peak shaving, promoting renewable energy consumption and contributing to the achievement of "dual carbon" targets. For self-owned power plants, the implementation of the responsibility tie-line assessment mechanism reduced demand charges and price difference charges, significantly increasing their enthusiasm for participating in grid regulation. For renewable energy companies, the amount of renewable energy blocked decreased, utilization rates improved, and grid connection of self-owned power plants effectively promoted renewable energy consumption. For provincial power companies, demand charges and price difference charges decreased, while revenue from renewable energy grid connection increased (transmission and distribution price revenue), and the ancillary services provided by self-owned power plants promoted the safe and stable operation of the power grid. According to preliminary calculations, the average monthly compensation for self-owned power plants from January to April 2022 was 5.8 million yuan, achieving break-even. The provincial company's (including the electricity sales company) revenue decreased from 40 million yuan to 30 million yuan.

[0172] Example

[0173] This invention presents a dispatching method for self-owned power plants based on a responsibility tie-line assessment mechanism for renewable energy consumption, specifically as follows:

[0174] Step 1: Analyze the composition of grid-connected and off-grid electricity prices for self-owned power plants and establish an expected revenue model for self-owned power plants;

[0175] Step 2: Based on the actual grid connection data and AGC grid connection dispatch instructions from self-owned power plants, propose equivalent AGC grid connection instructions and equivalent actual grid disconnection power suitable for the responsibility tie-line assessment mechanism. Divide the equivalent grid connection power into four categories according to different levels of the equivalent AGC grid connection instructions, and propose calculation methods for offsetting power, price difference power, and demand assessment in each category.

[0176] Step 3: Based on the actual grid disconnection data of self-owned power plants and AGC grid disconnection dispatch instructions, propose equivalent AGC grid disconnection instructions and equivalent actual grid disconnection power suitable for the responsibility tie-line assessment mechanism. According to the different levels of equivalent grid disconnection power following equivalent AGC grid disconnection instructions, four cases are divided into four categories, and calculation methods for offsetting electricity, price difference electricity, and demand assessment are proposed for each type of case.

[0177] Step 4: Analyze the data from the actual measured data of the power plant in the example to verify the feasibility of the proposed responsibility linkage assessment mechanism.

[0178] The results show that the self-owned power plant responsibility tie line assessment mechanism proposed in this invention, by refining various situations of self-owned power plants going up and down the grid, and providing targeted compensation and assessment schemes, reduces assessment costs while greatly improving the enthusiasm of self-owned power plants to participate in grid dispatch, and can effectively promote the level of new energy consumption.

[0179] Based on the responsibility-based assessment mechanism proposed above, this invention selects actual data from a self-owned power plant in Northwest China for data calculation and case analysis. The self-owned power plant currently has 2 × 350 MW self-owned generating units and a power load of approximately 480 MW. Among these factors, AGC bandwidth, grid offset compensation price, and surplus compensation price are key factors affecting the profitability of the self-owned power plant, and different combinations of these three factors will produce different profitability results.

[0180] First, we studied the changes in total profit and loss of Jinyang Power Plant from January to April under different equivalent AGC assessment bandwidths. The results showed that as the assessment bandwidth was continuously increased, the total profit of Jinyang Power Plant increased accordingly. When the bandwidth was less than 4%, the power plant was highly sensitive to bandwidth; further reducing the bandwidth would result in significant losses. Excessively high bandwidth led to higher compensation costs. Setting the bandwidth to around 5% allowed the power plant to basically achieve a balance between profit and loss, consistent with the optimization results described above.

[0181] Secondly, the fixed equivalent AGC assessment bandwidth is 5%, and the offset portion between on-grid and off-grid power is compensated at RMB 0.046 / kWh. The compensation price for unoffset electricity is calculated cyclically. The calculation results show that the revenue of self-owned power plants increases with the increase of the compensation price. The revenue reaches the break-even point when the price is in the range of RMB 0.08-0.12 / kWh. At this time, the average monthly compensation cost is about RMB 4.8-6.8 million.

[0182] Compared to the traditional assessment based on maximum grid demand, the responsibility tie-line assessment mechanism based on maximum grid deviation can significantly reduce the assessment costs for power plants' maximum demand. In summary, the responsibility tie-line assessment mechanism for self-owned power plants, by detailing various grid connection and connection scenarios and providing targeted compensation and assessment schemes, reduces assessment costs while greatly increasing the enthusiasm of self-owned power plants to participate in grid dispatch.

[0183] like Figure 6 As shown, the present invention also provides a dispatching system for self-owned power plants based on a responsibility tie-line assessment mechanism, comprising:

[0184] The curve acquisition module is used to acquire the actual output curve of the self-owned power plant, calculate the equivalent actual output curve, and then obtain the actual grid connection data of the self-owned power plant.

[0185] The model building module is used to build an expected revenue model for self-owned power plants based on the composition of on-grid and off-grid electricity prices.

[0186] The mechanism establishment module is used to establish a responsibility connection line assessment mechanism for self-owned power plants based on the actual grid connection data and AGC grid connection and dispatch instructions of the self-owned power plants.

[0187] The benefit analysis module is used to conduct case study analysis based on the historical grid connection and outgoing data of the power plant in the case study, following the AGC dispatch instructions, and in conjunction with the expected revenue model of the self-owned power plant and the specific classification scheme of the responsibility tie line assessment mechanism. It also conducts a comprehensive benefit analysis on the changes in the revenue of various stakeholders after the implementation of the responsibility tie line assessment mechanism.

[0188] like Figure 7 As shown, the present invention provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the steps of the self-owned power plant dispatching method based on the responsibility tie-line assessment mechanism.

[0189] The self-owned power plant dispatching method based on the responsibility tie-line assessment mechanism includes the following steps:

[0190] Obtain the actual output curve of the self-owned power plant, calculate the equivalent actual output curve, and then obtain the actual grid connection data of the self-owned power plant.

[0191] Based on the composition of on-grid and off-grid electricity prices for self-owned power plants, establish an expected revenue model for self-owned power plants;

[0192] Based on the actual grid connection data and AGC grid connection dispatch instructions of the self-owned power plant, establish a responsibility communication line assessment mechanism for the self-owned power plant.

[0193] Based on the historical grid connection data of the power plant in the case study, which follows the AGC dispatch instructions, and combined with the expected revenue model of the self-owned power plant and the specific classification scheme of the responsibility tie line assessment mechanism, a case study analysis was carried out. A comprehensive benefit analysis was also conducted on the changes in the revenue of various stakeholders after the implementation of the responsibility tie line assessment mechanism.

[0194] The present invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the self-owned power plant dispatching method based on the responsibility tie-line assessment mechanism.

[0195] The self-owned power plant dispatching method based on the responsibility tie-line assessment mechanism includes the following steps:

[0196] Obtain the actual output curve of the self-owned power plant, calculate the equivalent actual output curve, and then obtain the actual grid connection data of the self-owned power plant.

[0197] Based on the composition of on-grid and off-grid electricity prices for self-owned power plants, establish an expected revenue model for self-owned power plants;

[0198] Based on the actual grid connection data and AGC grid connection dispatch instructions of the self-owned power plant, establish a responsibility communication line assessment mechanism for the self-owned power plant.

[0199] Based on the historical grid connection data of the power plant in the case study, which follows the AGC dispatch instructions, and combined with the expected revenue model of the self-owned power plant and the specific classification scheme of the responsibility tie line assessment mechanism, a case study analysis was carried out. A comprehensive benefit analysis was also conducted on the changes in the revenue of various stakeholders after the implementation of the responsibility tie line assessment mechanism.

[0200] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0201] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0202] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0203] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0204] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the protection scope of the claims of the present invention.

Claims

1. A dispatching method for self-owned power plants based on a responsibility tie-line assessment mechanism, characterized in that, include: Obtain the actual output curve of the self-owned power plant, calculate the equivalent actual output curve, and then obtain the actual grid connection data of the self-owned power plant. Based on the composition of on-grid and off-grid electricity prices for self-owned power plants, establish an expected revenue model for self-owned power plants; Based on the actual grid connection data and AGC grid connection dispatch instructions of the self-owned power plant, establish a responsibility communication line assessment mechanism for the self-owned power plant. Based on the historical grid connection data of the power plant in the case study, following the AGC dispatch instructions, and combined with the expected revenue model of the self-owned power plant and the specific classification scheme of the responsibility tie line assessment mechanism, a case study analysis was carried out, and a comprehensive benefit analysis was conducted on the changes in the revenue of various stakeholders after the implementation of the responsibility tie line assessment mechanism. The aforementioned mechanism for assessing the responsibility of self-owned power plants, based on actual grid connection and AGC grid connection and dispatch instructions, includes: Based on actual grid connection data and AGC grid connection dispatch instructions from self-owned power plants, an equivalent AGC grid connection instruction and equivalent actual grid disconnection power suitable for the responsibility tie line assessment mechanism are proposed. Based on the different levels of equivalent grid-connected power following equivalent AGC grid-connected instructions, we propose calculation methods for offsetting power, price difference power, and demand assessment under various conditions. Based on actual grid disconnection data from self-owned power plants and AGC grid disconnection dispatch instructions, this paper proposes equivalent AGC grid disconnection instructions and equivalent actual grid disconnection power applicable to the responsibility tie-line assessment mechanism; according to the different levels of equivalent grid disconnection power following equivalent AGC grid disconnection instructions, this paper proposes calculation methods for offsetting power, price difference power and demand assessment under various conditions. The classification based on different levels of equivalent internet access power following equivalent AGC internet access commands is specifically divided into: Scenario 1: If the actual output of the self-owned power plant is within the bandwidth of the AGC dispatch command, then the actual output of the self-owned power plant will be fully included in the offset power portion for settlement. Scenario 2: Insufficient grid connection capacity of self-owned power plants; In this case, self-owned power plants bear both the AGC assessment and the grid connection price difference loss. At the same time, compensation is given proportionally based on the self-owned power plants' execution of AGC instructions. Scenario 3: The amount of electricity generated by the self-owned power plant exceeds the AGC command bandwidth. In this case, the actual output of the self-owned power plant will be decomposed. The portion of electricity within the AGC bandwidth will be included in the compensation electricity, while the portion exceeding the bandwidth will bear both the AGC assessment and the loss from the grid connection price difference. Scenario 4: The self-owned power plant fails to effectively implement the AGC grid connection instruction; in this case, the self-owned power plant will bear both the AGC assessment and the grid connection price difference loss, and will not be compensated. The classification based on the equivalent offline power following the equivalent AGC offline command at different levels is specifically divided into: Scenario 1: If the actual electricity output from the self-owned power plant is within the AGC dispatch instruction bandwidth, then all the electricity output from the self-owned power plant will be included in the offset electricity portion for settlement. Scenario 2: Insufficient grid connection capacity of self-owned power plants; In this case, self-owned power plants simultaneously bear the burden of AGC assessment, grid connection price difference losses, and maximum demand assessment. Scenario 3: The amount of electricity discharged from the self-owned power plant exceeds the AGC command bandwidth. In this case, the actual amount of electricity discharged from the self-owned power plant will be decomposed. The amount of electricity within the AGC bandwidth will be included in the compensation amount. The amount exceeding the bandwidth will bear the responsibility for AGC assessment, the loss from the price difference between the discharged electricity and the maximum demand assessment. Scenario 4: Self-owned power plants fail to effectively implement AGC (Automatic Guided Vehicle) grid disconnection instructions; in this case, the self-owned power plant will simultaneously bear the AGC assessment, grid disconnection price difference loss, and demand assessment, without compensation.

2. The dispatching method for self-owned power plants based on the responsibility tie-line assessment mechanism according to claim 1, characterized in that, The composition of the on-grid and off-grid electricity prices of the self-owned power plant includes: The on-grid electricity price for self-owned power plants is composed as follows: On-grid electricity price of coal-fired self-owned power plants Benchmark feed-in tariffs are generally adopted in all cases; The on-grid tariff for self-owned power plants includes the basic tariff, the electricity price per unit, and the power regulation fee; the composition of the on-grid tariff for self-owned power plants is as follows: (1) In the formula: The off-grid electricity price; The basic electricity price; Electricity price per unit; To adjust electricity prices; Among them, the basic electricity price This includes two scenarios: billing based on maximum demand and billing based on transformer capacity. Billing based on maximum demand is settled based on the maximum monthly electricity demand. Electricity price The electricity purchase price is settled monthly; the transaction price is settled based on the actual transaction price. Adjusting electricity prices Calculated based on the power factor measured by the self-owned power plant.

3. The dispatching method for self-owned power plants based on the responsibility tie-line assessment mechanism according to claim 1, characterized in that, The establishment of the expected revenue model for self-owned power plants includes: Establish a linear programming model with the expected revenue of the self-owned power plant as the objective, and the objective function is: (2) Constraints: (3) (4) (5) (6) Among them, the objective function is to minimize the absolute value of the deviation between the total profit and loss of the self-owned power plant and the expected profit and loss; Total profit and loss of self-owned power plants The expected profit or loss of the self-owned power plant; For the total compensation cost, The total price difference resulted in a loss. Costs for demand assessment; The constraint is the bandwidth of the optimization variable. Offset electricity compensation price and the price of compensation for unoffset electricity consumption The range of values ​​for .

4. The dispatching method for self-owned power plants based on the responsibility tie-line assessment mechanism according to claim 1, characterized in that, The assessment mechanism for the responsibility connection line of the self-owned power plant includes: Based on the grid AGC dispatch instructions and the actual on-grid and off-grid power of the self-owned power plant, the following assessment mechanism for the equivalent responsibility tie line of the self-owned power plant is designed: In the formula: These are equivalent to network access and disconnection commands; To schedule AGC commands; For the plant's own power plant load; This refers to the actual power output and the power consumption at the grid. This represents the actual power load of the self-owned power plant. For the purpose of establishing a contact line of responsibility; When the calculation result is greater than zero, it is considered online; when it is less than zero, it is considered offline. The bandwidth for the responsibility connection line assessment is determined with reference to the AGC assessment.

5. The dispatching method for self-owned power plants based on the responsibility tie-line assessment mechanism according to claim 1, characterized in that, Following the establishment of the assessment mechanism for the responsibility connection line of self-owned power plants, the following also includes: The feasibility of the proposed responsibility linkage assessment mechanism is verified by analyzing the measured data from the power plant in the case study.

6. The dispatching method for self-owned power plants based on the responsibility tie-line assessment mechanism according to claim 1, characterized in that, The analysis of specific classification schemes based on the expected revenue model of self-owned power plants and the responsibility linkage assessment mechanism includes: The equivalent AGC assessment bandwidth and the scope of offset power compensation are determined by combining the expected revenue optimization model of the self-owned power plant.

7. A dispatching system for self-owned power plants based on a responsibility tie-line assessment mechanism, comprising the dispatching method for self-owned power plants based on the responsibility tie-line assessment mechanism as described in any one of claims 1 to 6, characterized in that, include: The curve acquisition module is used to acquire the actual output curve of the self-owned power plant, calculate the equivalent actual output curve, and then obtain the actual grid connection data of the self-owned power plant. The model building module is used to build an expected revenue model for self-owned power plants based on the composition of on-grid and off-grid electricity prices. The mechanism establishment module is used to establish a responsibility connection line assessment mechanism for self-owned power plants based on the actual grid connection data and AGC grid connection and dispatch instructions of the self-owned power plants. The benefit analysis module is used to conduct case study analysis based on the historical grid connection and outgoing data of the power plant in the case study, following the AGC dispatch instructions, and in conjunction with the expected revenue model of the self-owned power plant and the specific classification scheme of the responsibility tie line assessment mechanism. It also conducts a comprehensive benefit analysis on the changes in the revenue of various stakeholders after the implementation of the responsibility tie line assessment mechanism.

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