Incremental benefit distribution method for combined operation of wind-light-water complementary power generation system

Abstract

The invention provides an incremental benefit distribution method for combined operation of a wind-light-water complementary power generation system, and the method comprises the steps: obtaining the actual output data of a wind power benefit subject, and calculating the optimal output range of the wind power benefit subject; acquiring actual output data of the photoelectric benefit subject, and calculating an optimal output range of the photoelectric benefit subject; hydroelectric benefit subject information is obtained, and hydroelectric benefit subject output constraint and system standby constraint are calculated; according to the data of the optimal output range of the wind power benefit subject, the optimal output range of the photoelectric benefit subject, the output constraint of the hydroelectric benefit subject and the system standby constraint, calculating the power generation increment benefit generated by the joint operation by using a joint optimization scheduling model and an independent optimization scheduling model; and adopting an Aumann-Shapley value method to distribute the power generation increment benefit generated by the joint operation, and obtaining the power generation increment benefit of each benefit subject through distribution.

Description

Technical Field

[0001] The present invention relates to the technical field of power generation system management, and more specifically, to a method for allocating incremental benefits of a wind-solar-hydro complementary power generation system operating in combination. Background Art

[0002] Wind energy, solar photovoltaics and hydropower, as important components of renewable energy, each have the characteristic of fluctuating power generation. The wind, solar and hydropower complementary power generation system integrates the power generation facilities of these three energy sources and utilizes their complementarity to improve the system's power generation stability and energy utilization rate.

[0003] In energy systems, especially in scenarios involving joint investment and operation by multiple stakeholders, cooperative game theory provides a theoretical basis for allocating system benefits.

[0004] Traditional benefit distribution methods include simple distribution methods such as direct distribution according to investment ratio and fixed price electricity purchase. These methods fail to fully consider the actual contributions of all parties and the dynamics of system operation, and therefore have shortcomings in fairness and efficiency.

[0005] As a method in cooperative game theory, the Shapley value method allocates benefits by considering the marginal contribution of each participant to the total benefit, ensuring the fairness of the distribution. However, in complex systems involving a large number of participants, directly applying the Shapley value method will face the problem of excessive computational complexity.

[0006] The Shapley value method is one of the existing technologies used to deal with the problem of benefit allocation in a system operated by multiple stakeholders. The Shapley value is a concept in cooperative game theory that aims to allocate the total benefits of cooperation in a fair and reasonable way. The following is an overview of the basic technical solutions of the Shapley value method:

[0007] The basic principle of the Shapley value method:

[0008] The Shapley value was proposed by Lloyd Shapley and is based on the idea that each player (or stakeholder) should receive a payment (or benefit) equal to the average marginal contribution they make by joining the collaboration. In a multi-party energy system, this means that the benefits of each participant should be distributed according to their contribution to the total benefits of the system. The formula is as follows:

[0009]

[0010] Among them, member i has (|S|-1)! sortings when participating in alliance S, |S| represents the number of members included in alliance S, and the remaining (n-|S|) members have (n-|S|)! sortings. The different sorting combinations of all member i participating in divided by the random sorting combinations of n members is the weight of the benefits that member i should share for the entire alliance, recorded as [(|S|-1)! (n-|S|)! ] / (n!). The marginal contribution created by member i participating in different alliances S for its own participation in the alliance is recorded as [v(S)-v(S\{i})].

[0011] A cooperative game model is established to define the set of all stakeholders and any subsets they can form, each of which represents a possible cooperation scenario.

[0012] Calculate the marginal contribution. For each participant, in each possible cooperation plan, calculate the change in cooperation benefits before and after the participant joins, that is, the marginal contribution.

[0013] Calculate the Shapley value. For each participant, its Shapley value is the weighted average of the marginal contributions of the participant in all possible cooperation schemes. The weight is determined by the number of participants in the cooperation scheme, ensuring that the Shapley value of each participant fairly reflects its contribution to the total benefit.

[0014] Benefit distribution is carried out according to the calculated Shapley value, and the benefit obtained by each participant is proportional to its Shapley value.

[0015] In the existing technical solutions, the Shapley value ensures that each participant obtains corresponding benefits according to its actual contribution, satisfying the principle of fairness; for any given cooperative game, the Shapley value gives a unique benefit distribution plan; the total benefit is fully distributed to all participants without any surplus.

[0016] Although the Shapley value method is very elegant in theory and ensures the fairness and efficiency of distribution, in practical applications, especially when there are a large number of participants, the process of calculating the Shapley value may be very complicated and computationally intensive, resulting in limited practical applications. This is because it is necessary to consider all possible combinations of participants and their marginal contributions. When the number of participants increases, the number of combinations increases exponentially, and the calculation becomes infeasible.

[0017] The existing technical solution of using the Shapley value method to distribute benefits, although it guarantees fairness and uniformity in theory, has the following main disadvantages in practical applications:

[0018] 1. High computational complexity: The Shapley value method requires calculating the marginal contribution of each participant in all possible cooperation combinations. When the number of participants is large, the number of these possible combinations grows exponentially, resulting in a huge amount of computation, especially for large-scale multi-stakeholder systems. This computational complexity makes the Shapley value method difficult to apply directly;

[0019] 2. Long computation time: Due to the high computational complexity, the time required to calculate the Shapley value can be very long, which becomes a significant bottleneck in application scenarios that require quick decision making or real-time update of allocation plans;

[0020] 3. Limited practicality: Due to computational complexity and time constraints, the practicality of the Shapley value method in practical applications is limited, especially for dynamically changing systems and situations where allocation plans need to be frequently recalculated;

[0021] 4. High information requirements; the Shapley value method requires detailed information about each possible cooperation combination, including the marginal contribution of each participant; in practice, it may be very difficult to collect and verify this information, especially in scenarios involving complex systems and multiple resources;

[0022] 5. It is difficult to directly handle continuous strategy space; the Shapley value method was originally designed for discrete cooperative games. For application scenarios involving continuous strategy space (such as energy systems with continuous production volume adjustment), direct application of the Shapley value method may require additional methodological extensions and adaptations.

[0023] Therefore, although the Shapley value method occupies an important position in allocation theory, the above shortcomings limit its application in complex practical systems, especially in energy systems that need to deal with a large number of stakeholders and dynamically changing situations. This has prompted the exploration and development of more efficient allocation methods suitable for practical applications.

[0024] Specifically, the technical problems faced by the present invention include:

[0025] 1. Quantification of incremental benefits: How to accurately quantify the incremental benefits generated by the joint operation of wind, solar and hydroelectric power generation systems compared to their separate operations, including the increase in total power generation and possible economic benefits;

[0026] 2. Design of benefit allocation mechanism: Design a fair and effective allocation mechanism to ensure that all participants reasonably share the incremental benefits of joint operation according to their contributions, which needs to take into account the characteristics of different power generation methods and the different contributions of stakeholders;

[0027] 3. Calculation problems when a large number of stakeholders participate; When there are a large number of stakeholders participating in the cooperation, how to effectively handle the calculation problem of benefit distribution and avoid the practical problems caused by excessive calculation in traditional cooperative game theory methods;

[0028] 4. The rationality and acceptability of the allocation results; ensuring that the allocation mechanism is not only fair in theory but also accepted by all parties in practice, that is, it satisfies the principles of individual rationality, alliance rationality and global rationality to promote long-term cooperation among all parties.

[0029] In this power generation system, the complementary characteristics of wind, photovoltaic and hydropower technologies can improve energy utilization efficiency and system stability, but since multiple different stakeholders are involved, a reasonable mechanism is needed to distribute the additional benefits of this joint operation to ensure that all participants can obtain fair benefits from it. Summary of the invention

[0030] The purpose of the present invention is to provide a method for allocating incremental benefits of a wind-solar-hydro complementary power generation system operating in combination.

[0031] The present invention aims to solve the technical problem of how to fairly and efficiently distribute the incremental benefits generated by the joint operation when multiple stakeholders jointly operate a wind, solar and hydropower complementary power generation system.

[0032] Compared with the prior art, the technical solution of the present invention and its beneficial effects are as follows:

[0033] A method for allocating incremental benefits of the joint operation of a wind-solar-hydro complementary power generation system comprises: obtaining actual output data of wind power interest entities and calculating the optimal output range of the wind power interest entities; obtaining actual output data of photovoltaic interest entities and calculating the optimal output range of photovoltaic interest entities; obtaining information of hydropower interest entities and calculating output constraints of the hydropower interest entities and system reserve constraints; calculating the incremental benefits of power generation generated by the joint operation by using a joint optimization scheduling model and an independent optimization scheduling model according to the data of the optimal output range of the wind power interest entities, the optimal output range of the photovoltaic interest entities, the output constraints of the hydropower interest entities and the system reserve constraints; and distributing the incremental benefits of power generation generated by the joint operation by using an Aumann-Shapley value method to obtain the incremental benefits of power generation of each interest entity.

[0034] The beneficial effects of the present invention are:

[0035] The present invention provides an incremental benefit allocation method for the joint operation of a wind-solar-hydroelectric complementary power generation system, aiming to provide a fair and efficient incremental benefit allocation scheme for a wind-solar-hydroelectric complementary power generation system jointly operated by multiple stakeholders. The system is mainly composed of a server and a client, wherein the server is responsible for calculating and allocating incremental benefits, while the client is used for data input, result display and user interaction.

[0036] The solution provided by the present invention solves the problems of fairness, efficiency and computational feasibility by adopting a method based on Aumann-Shapley value and combining a specially designed software architecture and algorithm optimization. It has high innovation and application value and is helpful to promote the further development and utilization of renewable energy.

[0037] The Aumann-Shapley value method can mathematically and fairly distribute incremental benefits, ensuring that each stakeholder receives corresponding benefits based on its contribution to the joint operation. This method reduces subjective judgment and bias in the allocation process and improves the acceptance of the allocation results by all parties.

[0038] Through optimization algorithms and modular software design, the present invention is able to quickly process complex benefit allocation calculations, especially when dealing with a large number of stakeholders involved. This efficient calculation process reduces operating costs while improving the system's responsiveness and user satisfaction.

[0039] A fair and transparent benefit distribution mechanism can encourage more stakeholders to participate in the joint operation of the wind, solar and hydropower complementary power generation system. The promotion of this cooperation model will help improve the energy efficiency and reliability of the entire system, while promoting the further development and utilization of renewable energy.

[0040] The technical solution design of the present invention has good adaptability and flexibility, and can adjust the allocation strategy and calculation method according to different situations and needs, which enables the system to adapt to wind-solar-hydro complementary power generation projects of different scales and types and meet the needs of different users and markets.

[0041] By effectively utilizing and integrating renewable energy sources such as wind, photovoltaic and hydropower, the invention supports the construction of a sustainable energy system. The fair benefit distribution mechanism further encourages stakeholders to invest in renewable energy technologies, helps reduce fossil fuel dependence and environmental pollution, and promotes environmental protection and climate change mitigation.

[0042] In summary, the technical solution of the present invention not only solves the complex benefit distribution problem at the technical level, but also promotes the development of renewable energy and cooperation among stakeholders at the economic and social levels. It has important practical application value and broad development prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic diagram of the steps of a method for allocating incremental benefits of a joint operation of a wind-solar-hydro complementary power generation system provided by an embodiment of the present invention.

[0044] Figure 2 It is a flow chart of an incremental benefit allocation method for the joint operation of a wind-solar-hydro complementary power generation system provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0046] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0047] Reference Figure 1 and Figure 2 As shown, a method for allocating incremental benefits of the joint operation of a wind-solar-hydro complementary power generation system includes: obtaining actual output data of wind power interest entities, and calculating the optimal output range of the wind power interest entities; obtaining actual output data of photovoltaic interest entities, and calculating the optimal output range of photovoltaic interest entities; obtaining information on hydropower interest entities, and calculating output constraints of the hydropower interest entities and system backup constraints; calculating the incremental power generation benefits generated by the joint operation using a joint optimization scheduling model and an independent optimization scheduling model based on the data of the optimal output range of the wind power interest entities, the optimal output range of the photovoltaic interest entities, the output constraints of the hydropower interest entities, and the system backup constraints; and distributing the incremental power generation benefits generated by the joint operation using the Aumann-Shapley value method to obtain the incremental power generation benefits of each interest entity.

[0048] The Aumann-Shapley value method is used to allocate the incremental benefits of power generation generated by the joint operation, and the incremental benefits of power generation obtained by each stakeholder are allocated, including:

[0049] The mathematical model is:

[0050]

[0051] in, is the marginal benefit of power generation resources, λ is an auxiliary parameter, and b is the upper limit of power generation resources;

[0052] The numerical calculation of the integral is achieved by discretizing the auxiliary parameter λ into k values ​​in the interval [0, 1];

[0053] If k is large enough, the power generation efficiency of each segment is:

[0054] ΔZ=Z(λ k -λ k-1 )=π k Δb k =π k b(λ k -λ k-1 )

[0055] The total power generation benefit associated with the upper limit b of power generation resources is:

[0056]

[0057] Here, π is a dual variable associated with the upper limit value b of the power generation resource.

[0058] The method of using the Aumann-Shapley value method to allocate the incremental benefits of power generation generated by the joint operation to obtain the incremental benefits of power generation of each stakeholder also includes:

[0059] The total generation benefits associated with all segments of wind, photovoltaic and hydropower are:

[0060]

[0061] in, are the power generation benefits of wind power, photovoltaic power and hydropower under the Aumann-Shapley value method; are the maximum outputs of wind power and photovoltaic power generation unit i at time t respectively; and are the maximum output of hydropower unit i at time t respectively.

[0062] The method of using the Aumann-Shapley value method to allocate the incremental benefits of power generation generated by the joint operation to obtain the incremental benefits of power generation of each stakeholder also includes:

[0063] The Aumann-Shapley value method of the incremental benefit allocation method for the joint operation of wind-solar-hydro complementary power generation system is expressed as:

[0064]

[0065] Among them, φ A-S The incremental benefit of power generation for the beneficiary n; It is the distribution result of the incremental power generation benefit of the beneficiary n.

[0066] The present invention utilizes mixed integer linear programming (MILP) and other optimization algorithms to simulate the separate operation and joint operation of the wind-solar-hydro complementary power generation system, and accurately calculates the incremental benefits generated by the joint operation. The accuracy of this calculation method is the basis for achieving fair distribution.

[0067] The Aumann-Shapley value method is used to distribute the incremental benefits generated by the joint operation, ensuring that each participant receives a corresponding benefit distribution based on its contribution to the total benefits of the system. The present invention adopts a modular software architecture, including a data collection module, an incremental benefit calculation module, a benefit distribution module, a result output module, etc., as well as a user interface module and a data display module of the client; this design improves the flexibility and scalability of the system while ensuring the efficiency and accuracy of the calculation process. The interaction process between the client and the server is described in detail, including data submission, processing requests and result feedback, etc. This interactive design ensures the user experience is friendly and the system is convenient to use. In view of the computational complexity problem that may arise when multiple stakeholders are involved, the present invention proposes an optimization scheme, such as using a numerical method to optimize the Aumann-Shapley value calculation process to solve the benefit distribution problem of large-scale participants.

[0068] The solution provided by the present invention is a benefit allocation algorithm based on Aumann-Shapley value and its application in wind-solar-water complementary power generation system, as well as a software architecture and modular system designed to implement the algorithm. The present invention aims to promote the effective use of renewable energy and fair cooperation among multiple stakeholders, and support the realization of sustainable development goals.

[0069] The above embodiments are only used to explain the technical solutions of the present invention rather than to limit them. Those skilled in the art should understand that any modification and equivalent substitution that does not depart from the spirit and scope of the present invention should fall within the protection scope of the claims of the present invention.

Claims

1. A method for allocating incremental benefits of a wind-solar-hydroelectric complementary power generation system in joint operation, characterized in that: include: Obtain actual output data of wind power stakeholders and calculate the optimal output range of wind power stakeholders; Obtain the actual output data of the photovoltaic interest subject and calculate the optimal output range of the photovoltaic interest subject; Obtain information on hydropower stakeholders and calculate output constraints of hydropower stakeholders and system reserve constraints; The incremental power generation benefits generated by the joint operation are calculated using the joint optimization dispatch model and the independent optimization dispatch model based on the data of the optimal output range of the wind power interest entity, the optimal output range of the photovoltaic interest entity, the output constraints of the hydropower interest entity and the system reserve constraints; The Aumann-Shapley value method is used to allocate the incremental power generation benefits generated by the joint operation, and the incremental power generation benefits of each stakeholder are allocated.

2. The incremental benefit allocation method for the joint operation of a wind-solar-hydroelectric complementary power generation system according to claim 1 is characterized in that: The Aumann-Shapley value method is used to allocate the incremental benefits of power generation generated by the joint operation, and the incremental benefits of power generation obtained by each stakeholder are allocated, including: The mathematical model is: in, is the marginal benefit of power generation resources, λ is an auxiliary parameter, and b is the upper limit of power generation resources; The numerical calculation of the integral is achieved by discretizing the auxiliary parameter λ into k values ​​in the interval [0, 1]; If k is large enough, the power generation efficiency of each segment is: ΔZ=Z(λ k -l k-1 )=π k Δb k =π k b(λ k -l k-1 ) The total power generation benefit associated with the upper limit b of power generation resources is: Here, π is a dual variable associated with the upper limit value b of the power generation resource.

3. The incremental benefit allocation method for the joint operation of a wind-solar-hydroelectric complementary power generation system according to claim 2 is characterized in that: The method of using the Aumann-Shapley value method to allocate the incremental benefits of power generation generated by the joint operation to obtain the incremental benefits of power generation of each stakeholder also includes: The total generation benefits associated with all segments of wind, photovoltaic and hydropower are: in, are the power generation benefits of wind power, photovoltaic power and hydropower under the Aumann-Shapley value method; are the maximum outputs of wind power and photovoltaic power generation unit i at time t respectively; and are the maximum output of hydropower unit i at time t respectively.

4. The incremental benefit allocation method for the joint operation of a wind-solar-hydroelectric complementary power generation system according to claim 3 is characterized in that: The method of using the Aumann-Shapley value method to allocate the incremental benefits of power generation generated by the joint operation to obtain the incremental benefits of power generation of each stakeholder also includes: The Aumann-Shapley value method of the incremental benefit allocation method for the joint operation of wind-solar-hydro complementary power generation system is expressed as: Among them, φ A-S The incremental benefit of power generation for the beneficiary n; It is the distribution result of the incremental power generation benefit of the beneficiary n.

Images