Electricity transaction settlement method and system during the transition period from medium- and long-term transactions to spot transactions

Abstract

The present invention relates to a method and system for electricity transaction settlement in the transition period from medium- and long-term transactions to spot transactions, belonging to the field of electricity. First, market entities in the transition period from medium- and long-term transactions to spot transactions are divided, and then the settlement type of each electricity transaction type and the deviation electricity settlement type are determined according to the electricity transaction type performed by each divided market entity. Finally, the settlement type of each electricity transaction type and the settlement function of the deviation electricity settlement type are determined. The settlement function can be used to calculate the settlement of various transaction businesses in the transition period from medium- and long-term transactions to spot transactions, and the constructed electricity transaction settlement system supports the settlement of various transaction businesses, effectively supports electricity transactions, and realizes the effective matching of settlement electricity and delivery electricity.

Description

Technical Field

[0001] The present invention relates to the field of electric power, and in particular to a method and system for electric power transaction settlement in the transition period from medium- and long-term transactions to spot transactions. Background Art

[0002] As power generation and consumption plans are gradually liberalized, the construction of the power market is gradually transitioning from electricity trading to electricity trading. Trading varieties are gradually becoming more refined, standardized, and diversified. Starting from medium- and long-term electricity trading, the construction of the power market will be under the dual regulation of "market + plan" for a long time. It is necessary to scientifically and rationally design the market model and construction path to achieve a smooth transition.

[0003] Therefore, during the transition from medium- and long-term transactions to spot electricity transactions, how to effectively support electricity transactions and achieve effective matching of settlement electricity and delivery electricity is a technical problem that needs to be solved urgently. Summary of the invention

[0004] The purpose of the present invention is to provide a method and system for electricity transaction settlement in the transition period from medium- and long-term transactions to spot transactions, so as to effectively support electricity transactions and achieve effective matching of settlement electricity and delivery electricity.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] A method for electricity transaction settlement during the transition period from medium- and long-term transactions to spot transactions, comprising:

[0007] Classify market players in the transition period from medium- and long-term transactions to spot transactions;

[0008] According to the electricity transaction type conducted by each divided market entity, determine the settlement type of each electricity transaction type and the deviation electricity settlement type;

[0009] Determine the settlement type of each electricity transaction type and the settlement function of the deviation electricity settlement type;

[0010] According to the electricity transaction type of the market entity to be settled, the corresponding settlement function is used to calculate the electricity settlement amount of the market entity to be settled.

[0011] Optionally, market entities are divided into: spot units, non-spot units, spot users, non-spot users, and power sales companies;

[0012] The spot units are units that require access to the spot market;

[0013] The non-spot units are units that have not entered the spot market and only participate in medium- and long-term transactions;

[0014] The spot users are users who require access to the spot market and meet the time-sharing metering conditions;

[0015] The non-spot users are users who have not entered the spot market and only participate in medium- and long-term transactions;

[0016] The power sales company acts as an agent for some spot users and some non-spot users. Some of the spot users it acts as an agent for participate in time-of-use electricity transactions, and some of the non-spot users it acts as an agent for participate in non-time-of-use electricity transactions.

[0017] Optionally, the settlement type of each electricity transaction type includes: medium- and long-term financial contract settlement, medium- and long-term physical transaction settlement, and spot transaction settlement;

[0018] The deviation electricity quantity settlement types include: medium- and long-term non-time-based electricity quantity deviation settlement and spot transaction deviation settlement.

[0019] Optionally, the settlement function for the medium- and long-term financial contract settlement is in, It indicates the settlement amount of medium- and long-term financial contracts. Type indicates the transaction type divided according to the transaction subject cycle, including annual and monthly time-of-use electricity transactions. T indicates the total number of base time periods in the transaction subject cycle. T indicates the sequence number of the segments in the transaction subject cycle. represents the price agreed in the contract for period t, It represents the benchmark price calculated from the spot price during period t, Q t represents the contractually agreed electricity quantity in period t;

[0020] The settlement function of the medium- and long-term physical transaction settlement includes the medium- and long-term time-sharing physical contract settlement function and the long-term non-time-sharing physical contract settlement function;

[0021] The settlement function of the medium- and long-term time-sharing physical contract is: in, Indicates the settlement amount of the medium- and long-term time-sharing physical contract;

[0022] The settlement function of the long-term non-time-sharing physical contract is: in, Indicates the settlement amount of the medium- and long-term physical contract regardless of time, p c It represents the electricity price agreed in the non-time-sharing contract, Q represents the total electricity volume of the medium- and long-term non-time-sharing physical contract transaction; type' represents the transaction type divided according to the transaction subject cycle, including annual electricity transaction, quarterly electricity transaction, monthly electricity transaction, intra-month transaction, weekly electricity transaction, daily electricity transaction, base load, peak load and valley load electricity transaction;

[0023] The settlement functions of the spot transaction settlement include the day-ahead market transaction settlement function, the intraday market transaction settlement function and the real-time market transaction settlement function;

[0024] The day-ahead market transaction settlement function is: in, represents the market transaction amount on the previous day, represents the transaction price of the tth period in the market the day before, It represents the transaction volume of the tth period in the market the day before;

[0025] The intraday market transaction settlement function is: in, Indicates the intraday market transaction amount. It represents the transaction price of the intraday market in the tth period, Indicates the transaction volume of the intraday market in the tth period;

[0026] The real-time market transaction settlement function is: in, Indicates the real-time market transaction amount. It represents the transaction price of the tth period in the real-time market. Indicates the transaction volume in the tth period of the real-time market.

[0027] Optionally, the settlement function for the mid- to long-term non-time-divided electricity quantity deviation settlement is: Among them, ΔEB represents the monthly deviation settlement amount, Q real Indicates the actual electricity consumption of the user this month is the meter measurement value, Q c It indicates the total value of the user's various non-time-sharing transactions of electricity sold and bought this month. represents the comprehensive price index of the trading cycle calculated based on the spot price, and κ represents the penalty coefficient;

[0028] The settlement function of the spot transaction deviation settlement is: in, represents the deviation settlement amount of spot trading in period t, λ t Indicates the real-time market price during period t, Indicates the actual user metered electricity during period t.

[0029] An electric power transaction settlement system in the transition period from medium- and long-term transactions to spot transactions, the system comprising: a spot market subsystem, a contract market subsystem and a market settlement subsystem;

[0030] The spot market subsystem is deployed in the dispatching production safety zone, and the contract market subsystem and market settlement subsystem are deployed in the intranet system;

[0031] The contract market subsystem is connected to the spot market subsystem and the market settlement subsystem respectively; the contract market subsystem is used to carry out various medium- and long-term time-sharing electricity transactions and non-time-sharing electricity transactions involving different market entities, determine the transaction electricity and electricity price of the time period to be tested, and transmit the transaction electricity and electricity price of the time period to be tested to the spot market subsystem and the market settlement subsystem respectively;

[0032] The spot market subsystem is connected to the market settlement subsystem, and the spot market subsystem is used to conduct day-ahead market transactions, intraday market transactions, real-time market transactions or real-time balancing mechanism transactions involving different market entities, determine market clearing results according to the transaction volume and electricity price during the test period, and transmit the market clearing results to the market settlement subsystem;

[0033] The market settlement subsystem is used to obtain the electricity settlement amount of the market entities to be settled based on the trading volume and electricity price in the test period and the market clearing result, using the aforementioned electricity trading settlement method for the transition period from medium- and long-term transactions to spot transactions.

[0034] Optionally, the system further includes: a data reporting and information publishing subsystem;

[0035] The data declaration and information release subsystem is deployed in the external network system;

[0036] The data declaration and information release subsystem is connected to the spot market subsystem, the contract market subsystem and the market settlement subsystem respectively. The data declaration and information release subsystem is used for market entities to submit quotations, electricity volume and transaction curves for various transactions and display transaction results.

[0037] Optionally, the contract market subsystem includes: a non-time-sharing electricity quantity trading function module, a non-time-sharing electricity quantity trading result data summary module, a time-sharing electricity quantity trading function module and a time-sharing electricity quantity trading result data summary module;

[0038] The non-time-sharing electricity quantity trading function module is connected to the non-time-sharing electricity quantity trading result data summary module, and the non-time-sharing electricity quantity trading function module is used to carry out the annual electricity quantity trading, quarterly electricity quantity trading, monthly electricity quantity trading, intra-monthly electricity quantity trading, weekly electricity quantity trading and daily electricity quantity trading of the market entities, and transmit the annual, quarterly, monthly, intra-monthly, weekly and daily transaction electricity quantities and electricity prices to the non-time-sharing electricity quantity trading result data summary module for display;

[0039] The time-sharing electricity transaction function module is connected to the time-sharing electricity transaction result data summary module, and the time-sharing electricity transaction function module is used to carry out annual electricity transaction, quarterly electricity transaction, monthly electricity transaction, intra-month electricity transaction, weekly electricity transaction, daily electricity transaction and base load, peak load and valley load electricity transaction of market entities, and transmit the annual, quarterly, monthly, intra-month, weekly, daily, base load, peak load and valley load transaction electricity, electricity price and transaction curve to the time-sharing electricity transaction result data summary module for display.

[0040] Optionally, the settlement types performed by the market settlement subsystem include: medium- and long-term physical transaction settlement, medium- and long-term financial contract settlement, spot transaction settlement, medium- and long-term non-time-based electricity quantity deviation settlement, and spot transaction deviation settlement.

[0041] Optionally, the spot market subsystem includes: a market model and data management module, a declaration and release data management module, a day-ahead market module, an intraday market module, a real-time market module and a reliability unit commitment module;

[0042] The market model and data management module are respectively connected to the day-ahead market module, the intraday market module, the real-time market module, and the reliability unit commitment module. The market model and data management module is used to centrally manage market parameters, determine the market model required for market clearing, and transmit the market parameters and the market model to the day-ahead market module, the intraday market module, the real-time market module, and the reliability unit commitment module respectively.

[0043] The declaration and release data management module is connected to the data declaration and information release subsystem, and is used to review the information declared by market entities, perform data encryption and security verification, and provide information released to the market according to the power market information disclosure rules;

[0044] The day-ahead market module is connected to the intraday market module and the market settlement subsystem respectively. The day-ahead market module is used to determine the medium- and long-term contract day decomposition curve and the long-period unit combination mode according to the spot market rules, and to clear the market transaction results by using the safety-constrained unit combination and the safety-constrained economic dispatch model in the market model according to the market parameters;

[0045] The intraday market module is connected to the real-time market module and the market settlement subsystem respectively, and the intraday market module is used to calculate the future market clearing results according to the intraday market rules using the safety constraint unit commitment model in the market model;

[0046] The real-time market module is connected to the market settlement subsystem, and is used to calculate the future unit output plan and price by using the safety-constrained economic dispatch in the market model based on the market clearing results of the day-ahead market module and the intraday market module according to the current operation status of the power grid, the latest system load forecast and the real-time market quotation;

[0047] The reliability unit combination module is used to calculate a unit combination plan by using the safety constraint unit combination in the market model.

[0048] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0049] The present invention discloses a method and system for electricity transaction settlement in the transition period from medium- and long-term transactions to spot transactions. First, the market entities in the transition period from medium- and long-term transactions to spot transactions are divided. Then, according to the electricity transaction type performed by each divided market entity, the settlement type of each electricity transaction type and the deviation electricity settlement type are determined. Finally, the settlement function of the settlement type of each electricity transaction type and the deviation electricity settlement type is determined. The settlement function can be used to calculate the settlement of various transaction businesses in the transition period from medium- and long-term transactions to spot transactions. The constructed electricity transaction settlement system supports the settlement of various transaction businesses, effectively supports electricity transactions, and realizes the effective matching of settlement electricity and delivery electricity. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0051] Figure 1 This is a schematic diagram of existing medium- and long-term trading products; Figure 1 (a) is a schematic diagram of non-time-divided electricity trading products. Figure 1 (b) is a schematic diagram of intraday electricity trading products.

[0052] Figure 2 A schematic diagram of three stages of transition from a medium- to long-term market to a spot market provided by an embodiment of the present invention;

[0053] Figure 3 A flow chart of a method for electricity trading settlement during the transition period from medium- and long-term trading to spot trading provided by an embodiment of the present invention;

[0054] Figure 4 An architecture diagram of the full-service integrated support platform for power trading provided by an embodiment of the present invention;

[0055] Figure 5 A flow chart of power trading provided by an embodiment of the present invention;

[0056] Figure 6 A functional architecture diagram of the spot subsystem provided by an embodiment of the present invention;

[0057] Figure 7 A flowchart of the electricity spot market organization provided by an embodiment of the present invention;

[0058] Figure 8 A functional architecture diagram of the contract market subsystem provided in an embodiment of the present invention;

[0059] Fig. 9 A functional architecture diagram of the market settlement system subsystem provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0061] The purpose of the present invention is to provide a method and system for electricity transaction settlement in the transition period from medium- and long-term transactions to spot transactions, so as to effectively support electricity transactions and achieve effective matching of settlement electricity and delivery electricity.

[0062] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0063] In order to solve the settlement methods and comprehensive settlement methods of various transactions during the transition from medium- and long-term transactions to electricity spot transactions, the present invention comprehensively considers the basic characteristics of the power system, market environment, market entities, transaction relationships, power transaction matching, electricity fee settlement and power delivery, and divides the transition from the medium- and long-term market to the spot market into three stages: a stage where a small number of large industrial users enter the electricity spot market, a stage where all large industrial users and industrial and commercial users enter the spot market, and a stage where all electricity users enter the spot market. Figure 2 In this process, it is necessary to define market entities and transaction relationships, clarify the transition plan for the market to gradually participate in the spot market, and establish a settlement technology support system to support electricity market transactions during the transition period.

[0064] 1. Segmentation of market players and trading relationships in the transition from medium- and long-term transactions to spot transactions

[0065] Market players participating in spot trading must determine the medium- and long-term electricity decomposition curve and obtain the real-time time-sharing output / load curve. Based on whether the market players can determine the real-time time-sharing output / load curve and the medium- and long-term electricity decomposition curve, the market players are divided into spot units, non-spot units, spot users, non-spot users, and power sales companies.

[0066] (1) Spot units: units that are required to enter the spot market.

[0067] (2) Non-spot units: units that have not entered the spot market and only participate in medium- and long-term transactions.

[0068] (3) Spot users: users who wish to enter the spot market and have the conditions for time-of-use metering. The first stage refers to a small number of large industrial users who meet the conditions.

[0069] (4) Non-spot users: users who have not entered the spot market and only participate in medium- and long-term transactions.

[0070] (5) Power sales companies: As two market players, some of the spot users they represent participate in time-of-use electricity transactions, while some of the non-spot users they represent participate in non-time-of-use electricity transactions.

[0071] Spot users (including the part of power sales companies acting as agents for spot users) can only participate in time-of-use electricity transactions, while non-spot users (including the part of power sales companies acting as agents for non-spot users) and non-spot units can only participate in non-time-of-use electricity transactions. Since non-spot units alone may not be sufficient to supply non-spot users, spot units can participate in both time-of-use electricity transactions and non-time-of-use electricity transactions.

[0072] 2. Concepts and methods of market players entering spot market

[0073] (1) Concept and method of users entering spot market

[0074] When users enter the spot market, it means that the users and the power sales companies they choose sign medium- and long-term contracts with power generation enterprises and the total of the time-sharing electricity in the medium- and long-term trading market, and the deviation from the actual electricity consumption in each period, must be settled in accordance with the spot market rules. Usually, only power users with a large enough scale of electricity consumption can participate in spot market transactions as spot market trading entities, and other power users must choose power sales companies to act as their agents to participate in the spot market.

[0075] As two market entities, the power sales company's agent spot users participate in time-of-use electricity transactions, and the agent non-spot users participate in non-time-of-use electricity transactions. Spot users (including the part of the power sales company acting as an agent for spot users) can only participate in time-of-use electricity transactions, and non-spot users (including the part of the power sales company acting as an agent for non-spot users) and non-spot units can only participate in non-time-of-use electricity transactions. Since non-spot units alone may not be sufficient to supply non-spot users, spot units can participate in both time-of-use electricity transactions and non-time-of-use electricity transactions.

[0076] There are three ways for users to enter the electricity spot market: first, to declare their willingness to trade electricity volume and electricity price in the spot market; second, to declare their willingness to purchase electricity volume as a price acceptor in the spot market (without reporting the purchase price); third, there is no need to declare trading intentions in the spot market. The power dispatching agency will use the system load forecast value as the total market demand to clear the spot market. The difference between the actual electricity consumption of power users participating in the spot market in each time period and the electricity consumption in the medium and long-term contracts for that period will be settled according to the spot market price.

[0077] (2) Concept and method of entering spot market on the power generation side

[0078] Corresponding to the power consumption on the user side, the units whose power generation is traded and settled through spot rules can be called spot units. On the contrary, when all the power of the generator set is bought and sold through medium- and long-term transactions, it is called non-spot unit. Based on this classification of generator sets, the effective transition of the units to the spot market is gradually realized.

[0079] For units entering the spot market, they must report both quantity and quotation according to spot trading rules, and determine their own deviation-adjusted electricity volume through market clearing.

[0080] 3. Market transaction types

[0081] (1) Medium- and long-term transaction types

[0082] Taking into account the three stages of market construction mentioned above, the types of medium- and long-term transactions vary according to the length of the delivery cycle, including annual electricity transactions, quarterly electricity transactions, monthly electricity transactions, intra-month electricity transactions, weekly electricity transactions, weekday electricity transactions, weekend electricity transactions, base load electricity transactions, peak load electricity transactions, valley load electricity transactions, and others. Trading methods include bilateral transactions, listing transactions, centralized bidding, and rolling matching. The peak load period can be temporarily set as the peak period in the peak and valley time-of-use electricity price policy (8:30-11:30, 14:30-17:30, 19:00-21:00). Among them, non-time-of-use electricity transactions only need to agree on the delivery period, and do not need to agree on the transaction electricity curve. Time-of-use electricity transactions must agree on both the delivery period and the delivery curve.

[0083] Time-of-use electricity trading and non-time-of-use electricity trading coexist. The trading methods of time-of-use electricity trading and non-time-of-use electricity trading include centralized trading and bilateral negotiated trading. Among them, centralized trading includes three forms: centralized bidding trading, rolling matching trading and listing trading.

[0084] (2) Spot trading type

[0085] According to the practice of power trading varieties at home and abroad, spot trading mainly includes day-ahead spot trading, intraday trading and real-time spot trading. Day-ahead and real-time market trading mainly adopt centralized bidding trading, intraday trading mainly adopts rolling matching trading, and also includes auxiliary service trading.

[0086] Based on the above, the embodiment of the present invention provides a method for electricity transaction settlement during the transition period from medium- and long-term transactions to spot transactions, such as Figure 3 As shown, including:

[0087] Step S1, classify the market entities in the transition period from medium- and long-term transactions to spot transactions.

[0088] Market players are divided into: spot units, non-spot units, spot users, non-spot users, and power sales companies.

[0089] Step S2, according to the electricity transaction type performed by each divided market entity, determine the settlement type of each electricity transaction type and the deviation electricity settlement type.

[0090] The settlement types for each type of electricity transaction include: medium- and long-term physical transaction settlement, medium- and long-term financial contract settlement, and spot transaction settlement. Deviation electricity quantity settlement types include: medium- and long-term non-time-sharing electricity quantity deviation settlement and spot transaction deviation settlement. That is, during the transition from medium- and long-term transactions to electricity spot transactions, the electricity market settlement system should be able to support various types of medium- and long-term physical transaction settlements, medium- and long-term financial contract settlements, spot transaction settlements, medium- and long-term non-time-sharing electricity quantity deviation settlements, and spot transaction deviation settlements.

[0091] Step S3, determining the settlement type of each electricity transaction type and the settlement function of the deviation electricity settlement type.

[0092] 1. Settlement of medium and long-term financial contracts

[0093] Market members participating in annual and monthly time-of-use electricity transactions can sign medium- and long-term price difference contracts of a financial nature. The medium- and long-term price difference contracts are settled with reference to the prices of spot transactions, but do not affect the settlement of spot transactions. For example, the price difference contracts are settled according to the delivery volume agreed in the contract and the difference between the contract price and the reference price. The settlement formula is as follows:

[0094]

[0095] in, It indicates the settlement amount of medium- and long-term financial contracts. Type indicates the transaction type divided according to the transaction subject cycle, including annual and monthly time-of-use electricity transactions. T indicates the total number of base time periods in the transaction subject cycle. T indicates the sequence number of the segments in the transaction subject cycle. represents the price agreed in the contract for period t, It represents the benchmark price calculated from the spot price during period t, Q t Represents the contractual electricity quantity in period t.

[0096] 2. Medium- and long-term physical transaction settlement

[0097] Medium- and long-term physical contracts are settled according to the delivery volume (time-sharing or non-time-sharing) and price agreed in the contract.

[0098]

[0099]

[0100] type′∈{Y, Quarter, M, inM, W, D, B, P, V} (4)

[0101] Indicates the settlement amount of the medium- and long-term time-sharing physical contract; represents the price agreed in the time-sharing contract for period t; Q t It represents the agreed amount of electricity in the time-sharing contract in period t. T represents the total number of periods in the transaction subject cycle; t represents the sequence number of the period in the transaction subject cycle;

[0102] Indicates the settlement amount of the medium- and long-term physical contract regardless of time; p c It represents the electricity price agreed in the non-time-sharing contract, and Q represents the total electricity volume of medium- and long-term non-time-sharing physical contract transactions.

[0103] type' indicates the transaction type divided according to the transaction subject cycle, annual electricity transaction (Y), quarterly electricity transaction (Quarter), monthly electricity transaction (m), intra-month transaction (inM), weekly electricity transaction (W), daily electricity transaction (D), base load (B), peak load (P), valley load electricity transaction (V).

[0104] 3. Spot transaction settlement

[0105] The day-ahead market settlement formula is as follows:

[0106]

[0107] represents the market transaction amount on the previous day, represents the transaction price of the tth period in the market the day before, It indicates the transaction volume of the tth period in the market the day before.

[0108]

[0109] Indicates the intraday market transaction amount. It represents the transaction price of the intraday market in the tth period, It indicates the transaction volume in the tth period of the intraday market.

[0110]

[0111] Indicates the real-time market transaction amount. It represents the transaction price of the tth period in the real-time market. Indicates the transaction volume in the tth period of the real-time market.

[0112] 4. Medium- and long-term monthly non-time-based electricity deviation settlement

[0113] Non-spot trading units, non-spot users and non-spot users represented by power sales companies will eventually conduct medium- and long-term non-time-based electricity quantity deviation settlement, and conduct deviation electricity quantity settlement for the deviation between the actual generation (consumption) of such users and the generation (consumption) agreed in the contract.

[0114]

[0115] Among them, ΔEB represents the monthly deviation settlement amount, Q real Indicates the actual electricity consumption of the user this month is the meter measurement value, Q c It indicates the total value of the user's various non-time-sharing transactions of electricity sold and bought this month. It represents the comprehensive price index of the trading cycle calculated based on the spot price, and κ represents the penalty coefficient.

[0116] 5. Spot transaction deviation settlement

[0117] Spot deviation settlement is applicable to spot trading units, spot users, and spot users represented by power sales companies. Since various transactions of such users have signed curves, each type of physical contract can be decomposed into the electricity volume in the t period. The settlement formula is as follows:

[0118]

[0119] represents the deviation settlement amount of spot trading in period t, λ t Indicates the real-time market price during period t, Indicates the actual user metered electricity during period t.

[0120] The electricity consumption of non-spot users represented by the power sales company is settled with reference to non-spot users; the electricity consumption of spot users represented by the power sales company is settled with reference to spot users. If the spot users represented by the power sales company do not have the conditions for time-of-use metering, the electricity consumption will be decomposed into time-of-use electricity according to the metered electricity and typical load curve, and settled with reference to the settlement method for spot users.

[0121] Medium- and long-term monthly non-time-based electricity quantity deviation settlement and spot transaction deviation settlement can effectively support electricity trading and achieve effective matching of settlement electricity and delivery electricity.

[0122] Step S4, according to the electricity transaction type of the market entity to be settled, using the corresponding settlement function to calculate the electricity settlement amount of the market entity to be settled.

[0123] A systematic solution is proposed for the transition problem of medium- and long-term electricity trading to spot trading. First, the development of the transition from the medium- and long-term market to the spot market is divided into three stages: the stage when a few large industrial users enter the electricity spot market, the stage when all large industrial users and industrial and commercial users enter the spot market, and the stage when all electricity users enter the spot market. Then, the market entities and transaction relationships in the transition stage from medium- and long-term trading to spot are subdivided, and the market entities are divided into spot units, non-spot units, spot users, non-spot users, and power sales companies. Then, the concepts and methods of users participating in market entities entering the spot are sorted out. The business logic objects are laid for the subsequent development of the power trading settlement system functions during the transition period from medium- and long-term trading to spot trading, and the business entities are clarified.

[0124] Design settlement technologies and methods for various types of trading businesses in the transition stage from medium- and long-term trading to spot trading, and fully cover the settlement functions of market-oriented trading businesses. Expand existing settlement businesses and provide technical support for the settlement of spot and medium- and long-term trading businesses. The above methods can effectively connect electricity trading and power trading, meet the needs of different market players to gradually transition to power trading smoothly, and have good connection in trading relationships.

[0125] Based on the basic characteristics of the power system, in principle, power trading mainly includes three relatively independent parts: transaction matching, settlement and delivery. Among them, transaction matching is reflected in the technical support system, mainly including the coordination of power commodity targets, transaction organization, and price clearing algorithm design; delivery is mainly achieved by grid dispatching management, decomposing the transaction power, and then using safety verification to ensure grid safety, considering the real-time constraints of the grid to adjust the real-time unit output, and realize grid congestion management. Settlement is based on the power generation, consumption and transaction data to conduct electricity bill revenue and expenditure. It is necessary to determine the power generation side and the user side, and the actual power delivery volume to ensure that the settlement matches the actual power use.

[0126] 1. Power trading full business integrated system support platform architecture

[0127] (1) Taking provincial power trading as the basic unit, the power market's full-process business, including day-ahead and real-time spot market trading, ancillary service trading, medium- and long-term contract trading, electricity volume settlement, and information release, is realized. The power trading full-business integrated system includes four subsystems: spot market subsystem, contract market subsystem, and market settlement subsystem.

[0128] Taking into account the users of the technical support system, the internal and external data integration and interaction of the power dispatching system and the marketing system, the real-time spot market transaction application is deployed in the dispatching production safety zone II, and the day-ahead market application is deployed in the safety zone III; the contract market and market settlement subsystem applications are deployed in the intranet system; the data declaration and release subsystem is deployed in the information extranet. Each application is based on the principle of relative independence and organic connection, and uses data synchronization, message communication, service call and other methods to run through the production control zone II / III and the internal and external information network subsystems.

[0129] The trading system follows the service-oriented design principle and adopts a hybrid B / S and C / S technology system to provide technical support and operational guarantee for the development and management of the trading system. Figure 4 , mainly including:

[0130] 1) Infrastructure layer: Build an integrated system support platform basic operating environment through virtualized host management and storage management.

[0131] 2) Platform service layer. Based on service bus / microservices, unified management of all applications is achieved, and application functions are highly coupled, low cohesive, and easy to expand. The platform service layer includes two modules: platform service and application microservices. The platform service module also includes market model service, message service, unified data access service, and promotion model. Application microservices include transaction clearing, data reporting, etc. Each service module is carried out through the message bus, service bus, and microservices.

[0132] 3) Application layer. Implement the application functions of four subsystems, namely, the spot subsystem, the contract market subsystem (medium- and long-term trading subsystem), the market settlement subsystem, and the data reporting and information release subsystem. The spot subsystem supports functions such as pre-clearing of the day-ahead market, real-time balancing of the market, and auxiliary service market operations; the contract market subsystem supports functions such as medium- and long-term transaction management and medium- and long-term contract management; the market settlement subsystem supports settlement calculations based on transaction results and measurement data, and issues detailed electronic settlement documents; the data reporting and information release subsystem includes functions such as market member registration, data reporting, and information release.

[0133] For example, Figure 5 The information transmission relationship between the four subsystems is shown.

[0134] 2. Functional architecture of the spot market subsystem

[0135] like Figure 6 As shown in the figure, the spot subsystem mainly includes the following application functions:

[0136] 1) Market model and data management: used to centrally manage and maintain the market models, various external data and market parameters required for market clearing calculations, and provide accurate and reliable market models and input data for subsequent market clearing calculations.

[0137] 2) Management of declared and released data: manage and review the declared information of market members, perform data encryption and security verification, and provide information released to the market in accordance with the information disclosure rules of the electricity market.

[0138] 3) Day-ahead market: On the day before the operation date (D-1), the medium- and long-term contract day decomposition curve and the long-period unit combination method are determined according to the spot market rules, safety verification is carried out, and the safety-constrained unit combination (SCUC) and safety-constrained economic dispatch (SCED) models are used to clear the market transaction results. The market clearing results include the unit combination status on the operation date (D-day), unit output plan, unit winning bid price, winning load, and load winning bid price of the electricity market.

[0139] 4) Intraday market: The safety-constrained unit commitment (SCUC) model is used according to the intraday market rules to calculate the start-stop plan, unit output plan and price of the rapid start-stop units for the next 30 minutes to several hours every 15 minutes. The rolling frequency and time scale can be flexibly set according to the market clearing calculation frequency requirements in different regions.

[0140] 5) Real-time market: Based on the current operating status of the power grid, the latest system load forecast and real-time market quotations (the day-ahead storage quotations can be used), on the basis of the day-ahead and intra-day rolling unit combinations, the safety constrained economic dispatch (SCED) is used to calculate the unit output plan and price for the next 15 minutes to 2 hours every 15 minutes.

[0141] 6) Reliability unit combination: Considering the constraints of power grid security, unit operation, system balance, etc., the unit combination plan is obtained through the full constraint unit combination SCUC calculation. Based on the 96-point data every day, the power generation and consumption plan is calculated and arranged considering the future 7*24-hour load forecast and power grid operation. The reliability unit combination is carried out 3 to 4 hours after the market is closed on the day before.

[0142] 7) Ancillary service market: Supports the market-based transactions of ancillary services, including frequency regulation and standby, determined through market quotations. Depending on the type of ancillary service transactions, it includes business modules such as frequency regulation ancillary service market, standby ancillary service market, and ancillary service market revenue analysis.

[0143] 8) Market risk control: Real-time monitoring of market operation status, identification of market operation risks based on various transaction data, and timely warning. According to the warning level, corresponding response measures are taken using the risk response measures library, while supporting manual and automatic response measures.

[0144] 9) Market supervision support: supervise and manage market players, grid operators, market operating institutions and their market behaviors in accordance with relevant laws, regulations and rules to achieve reasonable, orderly, fair, equitable and open competition in the electricity market.

[0145] 10) Market evaluation and analysis: Based on data such as electricity spot market operation, power grid operation, market registration, and market member behavior records, market analysis is conducted on various market members (such as three oligopoly tests, behavior impact tests, position analysis, etc.), and quantitative indicators are used to evaluate the operating status of the electricity spot market.

[0146] 11) Market simulation and deduction: used for market operation simulation and evaluation, operation technology verification, market operation personnel training, etc., mainly based on existing clearing models and algorithms, to adjust market models, market parameters, market operation boundaries, constraints and other data or import historical examples from outside, to carry out simulation clearing of electricity, ancillary services and other markets, analyze results, and evaluate market operation efficiency and operation risks under different market environments.

[0147] Taking the Zhejiang power market as an example, the Zhejiang power market adopts a centralized model. Market players manage market risks with medium- and long-term price difference contracts. The combination of power generation units in the province is optimized and cleared through the day-ahead market and (rolling) pre-dispatch plan. The online power of units in the province at different time periods is cleared through real-time market bidding. Figure 7 shown.

[0148] Zhejiang's electricity spot market includes the day-ahead market and the real-time market. The day-ahead market only conducts electricity energy transactions, while the real-time market conducts electricity energy transactions and ancillary services (including 10-minute reserve, 30-minute reserve and frequency regulation) transactions. As market construction continues to advance, Zhejiang will also gradually establish a financial transmission rights market and a capacity market.

[0149] 3. Contract Market Subsystem

[0150] Contract market subsystem (medium- and long-term trading system): supports different market players to participate in various medium- and long-term time-sharing electricity transactions and non-time-sharing electricity transactions (see Figure 8 ). It is mainly deployed in the information intranet and is operated and maintained by the trading center.

[0151] 1) Non-time-of-day electricity trading: Supports bilateral negotiation, centralized bidding and listing for annual electricity trading, quarterly electricity trading and monthly electricity trading. Supports listing and rolling matching for intra-month trading, weekly electricity trading and daily electricity trading, and uses annual electricity trading, quarterly electricity trading and monthly electricity trading as a means of deviation adjustment to obtain the transaction volume and electricity price of various time-of-day electricity trading.

[0152] 2) Time-of-day electricity trading: Supports bilateral negotiation, centralized bidding, listing, and rolling matching for annual electricity trading, quarterly electricity trading, monthly electricity trading, weekly electricity trading, base load, peak load, and valley load electricity trading. Among them, annual electricity trading, quarterly electricity trading, monthly electricity trading, and weekly electricity trading are mainly traded through bilateral negotiation, centralized bidding, and listing, while daily electricity trading, base load, peak load, and valley load electricity trading are mainly traded through bilateral negotiation, listing, and rolling matching. The results of time-of-day trading require an agreed trading curve, and the basic time period of the trading curve is consistent with the basic time period of spot trading, and the electricity volume and electricity price of each time period on the curve are clarified.

[0153] 4. Market Settlement Subsystem

[0154] Reference Fig. 9 The market settlement subsystem relies on medium- and long-term transaction settlement, spot transaction settlement, medium- and long-term non-time-sharing electricity deviation settlement, spot transaction deviation settlement, and medium- and long-term financial contract settlement calculation methods. Based on the actual delivered electricity and transaction electricity, various types of transactions are decoupled, electricity transactions are effectively supported, and settlement electricity and delivery electricity are effectively matched.

[0155] 5. Data declaration and information release subsystem:

[0156] This functional module supports users to submit quotes, electricity and transaction curves for various transactions, supports users to modify transaction information, and maintain user personal information. It also supports the release of transaction results.

[0157] Design the framework of the integrated system support platform for power trading, adopt the design concept of high cohesion and low coupling, and in terms of functional design, the system design includes four subsystems: spot market, contract market (medium- and long-term trading market), market settlement and declaration and release. It realizes the provincial power market's day-ahead and real-time spot market transactions, ancillary service transactions, medium- and long-term contract transactions, electricity settlement, information release and other power market full-process businesses, meets the requirements of power market operation and market supervision, and expands and develops the existing functional system design.

[0158] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0159] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A method for electricity transaction settlement during the transition period from medium- and long-term transactions to spot transactions, characterized in that: include: Classify market players in the transition period from medium- and long-term transactions to spot transactions; According to the electricity transaction type conducted by each divided market entity, determine the settlement type of each electricity transaction type and the deviation electricity settlement type; Determine the settlement type of each electricity transaction type and the settlement function of the deviation electricity settlement type; According to the electricity transaction type of the market subject to be settled, the corresponding settlement function is used to calculate the electricity settlement amount of the market subject to be settled; The settlement types of each electricity transaction type include: medium- and long-term financial contract settlement, medium- and long-term physical transaction settlement and spot transaction settlement; The deviation electricity quantity settlement types include: medium- and long-term non-time-based electricity quantity deviation settlement and spot transaction deviation settlement; The settlement function of the medium- and long-term financial contract settlement is: in, It indicates the settlement amount of medium- and long-term financial contracts. Type indicates the transaction type divided according to the transaction subject cycle, including annual and monthly time-of-use electricity transactions. T indicates the total number of base time periods in the transaction subject cycle. T indicates the sequence number of the segments in the transaction subject cycle. represents the price agreed in the contract for period t, It represents the benchmark price calculated from the spot price during period t, Q t represents the contractually agreed electricity quantity in period t; The settlement function of the medium- and long-term physical transaction settlement includes the medium- and long-term time-sharing physical contract settlement function and the long-term non-time-sharing physical contract settlement function; The settlement function of the medium- and long-term time-sharing physical contract is: in, Indicates the settlement amount of the medium- and long-term time-sharing physical contract; The settlement function of the long-term non-time-sharing physical contract is: in, Indicates the settlement amount of the medium- and long-term physical contract regardless of time, p c It represents the electricity price agreed in the non-time-sharing contract, Q represents the total electricity volume of the medium- and long-term non-time-sharing physical contract transaction; type' represents the transaction type divided according to the transaction subject cycle, including annual electricity transaction, quarterly electricity transaction, monthly electricity transaction, intra-month transaction, weekly electricity transaction, daily electricity transaction, base load, peak load and valley load electricity transaction; The settlement functions of the spot transaction settlement include the day-ahead market transaction settlement function, the intraday market transaction settlement function and the real-time market transaction settlement function; The day-ahead market transaction settlement function is: in, represents the market transaction amount on the previous day, represents the transaction price of the tth period in the market the day before, It represents the transaction volume of the tth period in the market the day before; The intraday market transaction settlement function is: in, Indicates the intraday market transaction amount. It represents the transaction price of the intraday market in the tth period, Indicates the transaction volume of the intraday market in the tth period; The real-time market transaction settlement function is: in, Indicates the real-time market transaction amount. It represents the transaction price of the tth period in the real-time market. Indicates the transaction volume of the real-time market in the tth period; The settlement function for the medium- and long-term non-time-divided electricity quantity deviation settlement is: Among them, ΔEB represents the monthly deviation settlement amount, Q real Indicates the actual electricity consumption of the user this month is the meter measurement value, Q c It indicates the total value of the user's various non-time-sharing transactions of electricity sold and bought this month. represents the comprehensive price index of the trading cycle calculated based on the spot price, and κ represents the penalty coefficient; The settlement function of the spot transaction deviation settlement is: in, represents the deviation settlement amount of spot trading in period t, λ t Indicates the real-time market price during period t, It represents the actual user metered electricity in period t. Indicates the contractual electricity quantity in period t when the transaction type is annual electricity transaction, Indicates the contractual electricity quantity in period t when the transaction type is quarterly electricity transaction. Indicates the contractual electricity quantity in period t when the transaction type is monthly electricity transaction. Indicates the contractually agreed electricity volume during the t period when the transaction type is intra-month transaction. Indicates the contractually agreed electricity quantity in period t when the transaction type is weekly electricity transaction. Indicates the contractually agreed electricity quantity in period t when the transaction type is daily electricity quantity transaction. Indicates the contractually agreed electricity volume during the base load period t when the transaction type is base load. Indicates that the transaction type is the contractually agreed electricity volume during the peak load period t. It indicates the contractually agreed electricity quantity in period t when the transaction type is valley load electricity transaction.

2. The method for electricity transaction settlement in the transition period from medium- and long-term transactions to spot transactions according to claim 1 is characterized in that: The market players are divided into: spot units, non-spot units, spot users, non-spot users, and power sales companies; The spot units are units that require access to the spot market; The non-spot units are units that have not entered the spot market and only participate in medium- and long-term transactions; The spot users are users who require access to the spot market and meet the time-sharing metering conditions; The non-spot users are users who have not entered the spot market and only participate in medium- and long-term transactions; The power sales company acts as an agent for some spot users and some non-spot users. Some of the spot users it acts as an agent for participate in time-of-use electricity transactions, and some of the non-spot users it acts as an agent for participate in non-time-of-use electricity transactions.

3. A power trading settlement system in the transition period from medium- and long-term trading to spot trading, characterized in that: The system includes: a spot market subsystem, a contract market subsystem and a market settlement subsystem; The spot market subsystem is deployed in the dispatching production safety zone, and the contract market subsystem and market settlement subsystem are deployed in the intranet system; The contract market subsystem is connected to the spot market subsystem and the market settlement subsystem respectively; the contract market subsystem is used to carry out various medium- and long-term time-sharing electricity transactions and non-time-sharing electricity transactions involving different market entities, determine the transaction electricity and electricity price of the time period to be tested, and transmit the transaction electricity and electricity price of the time period to be tested to the spot market subsystem and the market settlement subsystem respectively; The spot market subsystem is connected to the market settlement subsystem, and the spot market subsystem is used to conduct day-ahead market transactions, intraday market transactions, real-time market transactions or real-time balancing mechanism transactions involving different market entities, determine market clearing results according to the transaction volume and electricity price during the test period, and transmit the market clearing results to the market settlement subsystem; The market settlement subsystem is used to obtain the electricity settlement amount of the market entity to be settled based on the trading volume and electricity price in the test period and the market clearing result, using the electricity trading settlement method for the transition period from medium- and long-term transactions to spot transactions as described in any one of claims 1-2.

4. The power transaction settlement system for the transition period from medium- and long-term transactions to spot transactions according to claim 3 is characterized in that: The system also includes: a data reporting and information release subsystem; The data declaration and information release subsystem is deployed in the external network system; The data declaration and information release subsystem is connected to the spot market subsystem, the contract market subsystem and the market settlement subsystem respectively. The data declaration and information release subsystem is used for market entities to submit quotations, electricity volume and transaction curves for various transactions and display transaction results.

5. The power transaction settlement system for the transition period from medium- and long-term transactions to spot transactions according to claim 3 is characterized in that: The contract market subsystem includes: a non-time-sharing electricity quantity trading function module, a non-time-sharing electricity quantity trading result data summary module, a time-sharing electricity quantity trading function module and a time-sharing electricity quantity trading result data summary module; The non-time-sharing electricity quantity trading function module is connected to the non-time-sharing electricity quantity trading result data summary module, and the non-time-sharing electricity quantity trading function module is used to carry out the annual electricity quantity trading, quarterly electricity quantity trading, monthly electricity quantity trading, intra-monthly electricity quantity trading, weekly electricity quantity trading and daily electricity quantity trading of the market entities, and transmit the annual, quarterly, monthly, intra-monthly, weekly and daily transaction electricity quantities and electricity prices to the non-time-sharing electricity quantity trading result data summary module for display; The time-sharing electricity transaction function module is connected to the time-sharing electricity transaction result data summary module, and the time-sharing electricity transaction function module is used to carry out annual electricity transaction, quarterly electricity transaction, monthly electricity transaction, intra-month electricity transaction, weekly electricity transaction, daily electricity transaction and base load, peak load and valley load electricity transaction of market entities, and transmit the annual, quarterly, monthly, intra-month, weekly, daily, base load, peak load and valley load transaction electricity, electricity price and transaction curve to the time-sharing electricity transaction result data summary module for display.

6. The power transaction settlement system for the transition period from medium- and long-term transactions to spot transactions according to claim 3 is characterized in that: The types of settlements performed by the market settlement subsystem include: medium- and long-term physical transaction settlements, medium- and long-term financial contract settlements, spot transaction settlements, medium- and long-term non-time-based electricity quantity deviation settlements, and spot transaction deviation settlements.

7. The power transaction settlement system for the transition period from medium- and long-term transactions to spot transactions according to claim 4 is characterized in that: The spot market subsystem includes: a market model and data management module, a declaration and release data management module, a day-ahead market module, an intraday market module, a real-time market module and a reliability unit commitment module; The market model and data management module are respectively connected to the day-ahead market module, the intraday market module, the real-time market module, and the reliability unit commitment module. The market model and data management module is used to centrally manage market parameters, determine the market model required for market clearing, and transmit the market parameters and the market model to the day-ahead market module, the intraday market module, the real-time market module, and the reliability unit commitment module respectively. The declaration and release data management module is connected to the data declaration and information release subsystem, and is used to review the information declared by market entities, perform data encryption and security verification, and provide information released to the market according to the power market information disclosure rules; The day-ahead market module is connected to the intraday market module and the market settlement subsystem respectively. The day-ahead market module is used to determine the medium- and long-term contract day decomposition curve and the long-period unit combination mode according to the spot market rules, and to clear the market transaction results by using the safety-constrained unit combination and the safety-constrained economic dispatch model in the market model according to the market parameters; The intraday market module is connected to the real-time market module and the market settlement subsystem respectively, and the intraday market module is used to calculate the future market clearing results according to the intraday market rules using the safety constraint unit commitment model in the market model; The real-time market module is connected to the market settlement subsystem, and is used to calculate the future unit output plan and price by using the safety-constrained economic dispatch in the market model based on the market clearing results of the day-ahead market module and the intraday market module according to the current operation status of the power grid, the latest system load forecast and the real-time market quotation; The reliability unit combination module is used to calculate a unit combination plan by using the safety constraint unit combination in the market model.

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