Line loss allocation and settlement system and method for power transaction

Abstract

The invention discloses a line loss allocation and settlement system and method for power transaction. The system comprises a power generation module, a transaction center module, a power grid company module and a user module. The power generation module is used for collecting the declaration electric quantity and the transaction electricity price of each generator set, receiving the line loss coefficient from the transaction center module, and correcting the transaction electricity price. The user module is used for collecting and sending the power utilization demand of each power user, the transaction center module calculates the line loss coefficient of each node, sends the line loss coefficient to the power generation module and calculates the line loss cost of each power user, and the power grid company module charges the user side and redistributes the line loss cost surplus income from the user side. According to the invention, the problem in the prior art that the bidding behavior of the power generation module and the allocation mode distribution cannot be effectively influenced by accurately transmitting the line loss price signal to the power utilization module is solved, and an effective line loss allocation and settlement scheme can be provided for each province transaction center.

Description

Technical Field

[0001] The present invention relates to the technical field of power trading, and in particular to a line loss allocation and settlement system and method for power trading. Background Art

[0002] At present, the transmission and distribution price list for different voltage levels no longer includes line loss discounts. Instead, the line loss in the access link is listed separately, and the line loss electricity that users should purchase is calculated based on the comprehensive line loss rate, so that users bear the line loss costs based on their actual electricity purchase price.

[0003] The separate listing of line loss costs has a significant impact on all aspects of power market operations, including the trading strategies of market players, the settlement mechanism of trading institutions, the profit and loss allocation method, etc. It is urgent to study a set of line loss allocation and settlement systems and methods for power trading.

[0004] At present, my country generally uses the comprehensive line loss rate to calculate the line loss fee that the user should pay. The comprehensive line loss rate is the ratio of line loss power to grid-connected power. The grid-connected line loss discount is obtained by the transaction price × comprehensive line loss rate / (1-comprehensive line loss rate). However, the existing technology has the following problems:

[0005] (1) After the line loss in the grid-connected link is listed separately, the line loss price signal cannot be transmitted to the power generation side through an effective mechanism, affecting its bidding strategy.

[0006] (2) The current comprehensive line loss rate lacks sensitivity to specific locations and cannot effectively distinguish the differences in line losses caused by each node in the power grid, making it difficult to provide accurate location information for line loss prices.

[0007] In addition, since the bearer of line loss costs is not clearly defined, the line loss costs are all borne by the user side. This sharing method ignores the actual contribution of the transmission network in the generation of line losses, affecting the fairness and enthusiasm of the market.

[0008] In summary, it is imperative to study a new line loss allocation and settlement system and method for power trading. Summary of the invention

[0009] In view of the defects in the prior art, the present invention takes into account the geographical differences of market members participating in line loss transactions, as well as the different impacts of the transaction volume of each market member unit on transmission line losses, and proposes a line loss allocation and settlement system and method for power trading, aiming to promote the refinement of line loss trading methods and promote the development of power marketization.

[0010] The present invention provides a line loss allocation and settlement system for power trading, comprising: a power generation module, a trading center module, a power grid company module and a user module;

[0011] The power generation module is used to collect the declared electricity and transaction electricity price of each generator set, and receive the line loss coefficient from the trading center module. Each generator set corrects the transaction electricity price according to the line loss coefficient of the corresponding node, and sends the corrected transaction electricity price and declared electricity to the trading center module;

[0012] The user module is used to collect the electricity demand of each power user and send the electricity demand to the trading center module;

[0013] The trading center module is used to receive the declared power and transaction power price of each generator set, as well as the power demand of each power user, calculate the line loss coefficient of each node based on the power grid operation model and send it to the power generation module, conduct centralized trading sorting of the declared power of the generator set according to the transaction power price, and calculate the line loss cost of each power user in combination with the clearing power price, power demand and line loss coefficient, and send it to the power grid company module;

[0014] The power grid company module is used to receive the line loss fee from each user, collect fees from the user side, and redistribute the line loss fee surplus from the user side based on the line loss fee under actual operating conditions.

[0015] The present invention also provides a line loss allocation and settlement method for power trading, which uses the above-mentioned line loss allocation and settlement system for power trading, including the following steps:

[0016] Step S1, the power generation module collects the declared power and transaction power price of each power generation group and sends it to the trading center module, and the user module collects the power demand of each power user and sends it to the trading center module;

[0017] Step S2, the trading center module calculates the line loss coefficient of each node based on the power grid operation model, and sends the line loss coefficient of each node to the power generation module;

[0018] Step S3: the power generation module receives the line loss coefficient, and each power generation unit corrects the transaction electricity price to obtain a corrected transaction electricity price, and sends the corrected transaction electricity price to the transaction center module;

[0019] Step S4, the trading center module conducts centralized trading sorting according to the received revised trading electricity price and the declared electricity quantity, and calculates the bidding result in combination with the electricity demand. The bidding result includes the clearing electricity quantity and clearing electricity price of each generator set. The line loss cost of each electricity user is calculated according to the bidding result and the line loss coefficient corresponding to each electricity user, and sent to the power grid company module.

[0020] Step S5, the power grid company module receives the line loss fee for each power user calculated by the trading center module, charges the user side, and redistributes the line loss fee surplus collected from the user side according to the line loss fee under actual operating conditions.

[0021] Preferably, in step S2, the trading center module calculates the line loss coefficient of each node based on the power grid operation model by:

[0022] The line loss coefficient of each node is set as the effect of the unit power injected or extracted by each node on the change of the loss of the whole system:

[0023]

[0024] Among them, ΔP i The change in unit power injected or extracted for node i, ΔP L The line loss coefficient at the balance node is defined as the change in the line loss of the whole system. For power generation modules, The impact of unit power injected into each node on the change of system loss; for user modules, Extract the effect of unit power on the change of system loss for each node, i = 1, 2, ..., m, m is the number of nodes;

[0025] The line loss coefficient is obtained by simulating the unit changes of power generation and load at each node in turn. The trading center module uses the measurement data and network data samples every half hour in the previous month to calculate. The line loss coefficient of each node each month is the average of the 1440 half-hour line loss coefficients of the previous month. On the first day of each month, the trading center module will announce the latest line loss coefficients of each node in the system.

[0026] Preferably, in step S3, the method in which the power generation module corrects the transaction electricity price based on the line loss coefficient to obtain the corrected transaction electricity price is:

[0027]

[0028] Among them, λ i is the transaction price of the i-th generator set, λ ′ i is the revised transaction price of the i-th generator set, When the electricity price is revised, it will be higher and less competitive in transaction sorting; When , the revised transaction electricity price will be lower and more competitive in transaction sorting, i = 1, 2, ..., n, n is the number of generating units.

[0029] Preferably, step S4 includes the following sub-steps:

[0030] S4.1, the trading center module sorts the generators for centralized trading based on the revised trading electricity price, and calculates the clearing electricity quantity and clearing electricity price of each generator based on the electricity demand;

[0031] S4.2, the trading center module calculates the line loss cost of each power user based on the cleared power and cleared power price of each generator set and the line loss coefficient corresponding to each power user;

[0032] Preferably, in step S4.1, the trading center module performs centralized trading sorting on the generator sets based on the revised trading electricity price, and the method for obtaining the clearing electricity quantity and clearing electricity price of each generator set is:

[0033] The generators are sorted from low to high according to the bidding price to form a seller sequence. Combined with the electricity demand, the trading center module accumulates the declared power of the generators. When the accumulated sum of the declared power of the generators meets the electricity demand, the market clearing price λ is obtained. ′ s The matching power of each generator set, i.e. the clearing power;

[0034] Set the clearing price λ of the system electricity 0 for:

[0035]

[0036] Where s is the number of generator sets.

[0037] Preferably, in step S4.2, the trading center module settles the line loss costs for the user module according to the cleared electricity quantity and cleared electricity price of each generator set and the line loss coefficient corresponding to each power user, and sets 40% of the line loss costs to be borne by the power grid company and 60% to be borne by the power user;

[0038] According to the differences in electricity users, electricity users include residential, agricultural and industrial and commercial users. The settlement method is as follows:

[0039] Residential and agricultural users are priority electricity users and do not bear line loss costs. Line loss costs for residential and agricultural users are all borne by industrial and commercial users.

[0040] The line loss costs borne by industrial and commercial users are:

[0041]

[0042] Among them, C i is the line loss fee that the i-th industrial and commercial user needs to pay, q i is the electricity demand of the i-th industrial and commercial user, q jThe jth resident or agricultural user's electricity demand, m is the total number of residents and agricultural users, n is the total number of industrial and commercial users, and each industrial and commercial user bears the total bus loss cost of residents and agricultural users based on the proportion of its own electricity demand to the total industrial and commercial users' electricity demand.

[0043] Preferably, in step S5, the total line loss cost under actual operation is calculated, and the surplus generated by the line loss cost collected from the user module is redistributed and returned to each industrial and commercial user, in the following method:

[0044] C r =P L ×λ 0 ×0.6 (5)

[0045]

[0046] ΔC=C a -C r (7)

[0047]

[0048] Among them, C r is the total line loss cost that the user module should bear during actual operation, C a is the line loss fee to be collected from the user module, ΔC is the surplus generated by the line loss fee to be collected from the user module exceeding the total line loss fee, C ib The line loss income surplus allocated to each industrial and commercial user, P L is the line loss of the whole system.

[0049] The present invention also provides a computer-readable storage medium storing a computer program, and when the computer program is executed by a processor, the steps of the above-mentioned line loss allocation and settlement method for power trading are implemented.

[0050] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the computer program is executed by the processor, the steps of the above-mentioned line loss allocation and settlement method for power trading are implemented.

[0051] Compared with the prior art, the present invention has the following beneficial effects:

[0052] The present invention aims at the problems existing in the existing line loss trading methods in the power market, such as the difficulty in accurately transmitting the line loss price signal to the power consumption module, affecting the bidding behavior of the power generation module, and the unreasonable allocation method, and discloses a line loss allocation and settlement system and method for power trading. The system of the present invention includes a power generation module, a trading center module and a user module. The power generation module collects the declared power and transaction electricity price of each power generation group, receives the line loss coefficient of the trading center module and corrects the transaction electricity price, and sends the corrected electricity price and declared power to the trading center module. The user module collects the power demand of the power user and sends it to the trading center module. The trading center module calculates the line loss coefficient of each node based on the power grid operation model and sends it to the power generation module, centrally sorts the declared power of the power generation group according to the transaction electricity price, and calculates the line loss cost of each power user in combination with the power demand and the line loss coefficient.

[0053] The present invention provides a method for correcting the quotation of power generation modules using marginal line loss coefficients, which encourages power generation units that contribute little to line loss to reduce their trading prices and participate in competition. It also provides a method for allocating line loss costs, allowing power grid companies and users to jointly bear the responsibility for line losses, promoting fairness, and providing effective line loss trading solutions for power trading centers in various provinces. It is a practical and efficient system and method. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0055] Figure 1 It is a flowchart of a line loss trading method considering the whole cycle in an embodiment of the present invention;

[0056] Figure 2 This is a power system model used for line loss trading in an embodiment of the present invention. DETAILED DESCRIPTION

[0057] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0058] Embodiment 1:

[0059] The embodiment of the present invention provides a line loss allocation and settlement system for power trading, including: a power generation module, a trading center module, a power grid company module and a user module;

[0060] The power generation module is used to collect the declared electricity and transaction electricity price of each generator set, and receive the line loss coefficient from the trading center module. Each generator set corrects the transaction electricity price according to the line loss coefficient of the corresponding node, and sends the corrected transaction electricity price and declared electricity to the trading center module;

[0061] The user module is used to collect the electricity demand of each power user and send the electricity demand to the trading center module;

[0062] The trading center module is used to receive the declared power and transaction power price of each generator set, as well as the power demand of each power user, calculate the line loss coefficient of each node based on the power grid operation model and send it to the power generation module, conduct centralized trading sorting of the declared power of the generator set according to the transaction power price, and calculate the line loss cost of each power user in combination with the clearing power price, power demand and line loss coefficient, and send it to the power grid company module;

[0063] The power grid company module is used to receive the line loss fee from each user, collect fees from the user side, and redistribute the line loss fee surplus from the user side based on the line loss fee under actual operating conditions.

[0064] Embodiment 2:

[0065] Figure 1 It is a flowchart of the line loss trading method considering the whole cycle in an embodiment of the present invention.

[0066] like Figure 1 As shown, an embodiment of the present invention provides a line loss allocation and settlement method for power trading, using a line loss allocation and settlement system for power trading in the above embodiment 1 for line loss trading in the power market, including the following steps:

[0067] Step S1, the power generation module collects the declared power and transaction power price of each power generation group and sends them to the trading center module, and the user module collects the power demand of each power user and sends them to the trading center module.

[0068] In step S2, the trading center module calculates the line loss coefficient of each node based on the power grid operation model, and sends the line loss coefficient of each node to the power generation module.

[0069] In this embodiment, the trading center module calculates the line loss coefficient of each node according to historical data and the grid operation model as follows: the line loss coefficient of each node is set to the magnitude of the impact of the unit power injected or extracted by each node on the loss change of the entire system:

[0070]

[0071] Among them, ΔP iThe change in unit power injected or extracted for node i, ΔP L The line loss coefficient at the balance node is defined as the change in the line loss of the whole system. For power generation modules, The impact of unit power injected into each node on the change of system loss; for user modules, Extract the impact of unit power on the change of system loss for each node, i = 1, 2, ..., m, m is the number of nodes.

[0072] The line loss coefficient is obtained by simulating the unit changes of power generation and load at each node in turn. The trading center module uses the measurement data and network data samples every half hour in the previous month to calculate. The line loss coefficient of each node each month is the average of the 1440 half-hour line loss coefficients of the previous month. On the first day of each month, the trading center module will announce the latest line loss coefficients of each node in the system.

[0073] Step S3, the power generation module receives the line loss coefficient, each power generation unit corrects the transaction electricity price, obtains the corrected transaction electricity price, and sends the corrected transaction electricity price to the transaction center module.

[0074] The method for the power generation module to correct the transaction price based on the line loss coefficient to obtain the corrected transaction price is:

[0075]

[0076] Among them, λ i is the transaction price of the i-th generator set, λ ′ i is the revised transaction price of the i-th generator set, When the electricity price is revised, it will be higher and less competitive in transaction sorting; When , the revised transaction electricity price will be lower and more competitive in transaction sorting, i = 1, 2, ..., n, n is the number of generating units.

[0077] Step S4, the trading center module conducts centralized trading sorting according to the received revised trading electricity price and declared electricity quantity, and calculates the bidding result in combination with the electricity demand. The bidding result includes the clearing electricity quantity and clearing electricity price of each generator set. The line loss cost of each electricity user is calculated according to the bidding result and the line loss coefficient corresponding to each electricity user, and sent to the power grid company module.

[0078] Specifically, step S4 includes the following sub-steps:

[0079] S4.1, the trading center module arranges the generator sets for centralized trading based on the revised trading electricity price, and calculates the clearing electricity quantity and clearing electricity price of each generator set in combination with the electricity demand.

[0080] Specifically, the method for calculating the clearing electricity quantity and clearing electricity price of each generating unit is:

[0081] The generators are sorted from low to high according to the bidding price to form a seller sequence. Combined with the electricity demand, the trading center module accumulates the declared power of the generators. When the accumulated sum of the declared power of the generators meets the electricity demand, the market clearing price λ is obtained. ′ s The matching power of each generating unit is the clearing power.

[0082] The sorting rules are shown in the following table:

[0083] Table 1 Bidding ranking table

[0084] Bidding price / ￥ Generator Set Declared electricity / MW Cumulative amount / MV <![CDATA[λ ′ 1 ]]> 1 <![CDATA[p 1 ]]> <![CDATA[P 1 ]]> <![CDATA[λ ′ 2 ]]> 2 <![CDATA[p 2 ]]> <![CDATA[P 2 ]]> <![CDATA[λ ′ 3 ]]> 3 <![CDATA[p 3 ]]> <![CDATA[P 3 ]]> ······ ······ ······ ······ <![CDATA[λ ′ s ]]> s <![CDATA[p s ]]> <![CDATA[P s ]]>

[0085] Among them, λ ′ 1 <λ ′ 2 <λ ′ 3 <······<λ ′ s , p i is the declared power of the i-th generator, P i The cumulative power generation P is the sum of the reported power of the generators in the top ranking. s When it is equal to the sum of the power demand of the user module and the line loss, the bidding ends and the market clearing price λ is obtained. ′ s , and the matching power of each generator set, that is, the clearing power p i , 1≤i≤s, s is the number of generator sets.

[0086] Set the clearing price λ of the system electricity 0 for:

[0087]

[0088] Where s is the number of generator sets.

[0089] S4.2, the trading center module calculates the line loss cost of each power user based on the cleared power and cleared power price of each generator set and the line loss coefficient corresponding to each power user.

[0090] The trading center module settles the line loss costs for the user module based on the cleared electricity volume and cleared electricity price of each generator set and the line loss coefficient corresponding to each power user. Considering that the generation of line loss costs is related to factors such as the construction and operation of transmission lines, in order to promote the power grid company to actively reduce losses and increase efficiency, it is set that 40% of the line loss costs are borne by the power grid company and 60% are borne by the power user;

[0091] According to the differences in electricity users, electricity users include residential, agricultural and industrial and commercial users. The settlement method is as follows:

[0092] Residential and agricultural users are priority electricity users and do not bear line loss costs. Line loss costs for residential and agricultural users are all borne by industrial and commercial users.

[0093] The line loss costs borne by industrial and commercial users are:

[0094]

[0095] Among them, C i is the line loss fee that the i-th industrial and commercial user needs to pay, q i is the electricity demand of the i-th industrial and commercial user, q j The jth resident or agricultural user's electricity demand, m is the total number of residents and agricultural users, n is the total number of industrial and commercial users, and each industrial and commercial user bears the total bus loss cost of residents and agricultural users based on the proportion of its own electricity demand to the total industrial and commercial users' electricity demand.

[0096] Step S5, the power grid company module receives the line loss fee for each power user calculated by the trading center module, charges the user side, and redistributes the line loss fee surplus collected from the user side according to the line loss fee under actual operating conditions.

[0097] Since the line loss fee for the user module is based on the marginal line loss coefficient, rather than the average line loss coefficient, charging users at marginal cost will generate excess revenue because the marginal cost usually exceeds the average cost. Therefore, the total line loss fee under actual operation is calculated, and the surplus generated by the line loss fee collected from the user module is redistributed and returned to each industrial and commercial user in the following way:

[0098] C r =P L ×λ 0 ×0.6 (5)

[0099]

[0100] ΔC=C a -C r (7)

[0101]

[0102] Among them, C r is the total line loss cost that the user module should bear during actual operation, C a is the line loss fee to be collected from the user module, ΔC is the surplus generated by the line loss fee to be collected from the user module exceeding the total line loss fee, C ib The line loss income surplus allocated to each industrial and commercial user, P L is the line loss of the whole system.

[0103] Embodiment 3:

[0104] Figure 2 This is a power system model used for line loss trading in an embodiment of the present invention.

[0105] like Figure 2 As shown, a line loss allocation and settlement system for power trading in the above embodiment 1 is applied, taking a simple power system with 4 generators and 3 power users as an example, the load of node 4 is agricultural and residential users, and the load of nodes 3 and 5 is industrial and commercial users. The rationality and effectiveness of a line loss allocation and settlement method for power trading provided by an embodiment of the present invention are explained, and the specific steps are as follows:

[0106] The line loss coefficients of each node in the power system are shown in Table 2.

[0107] Table 2 Line loss coefficient of each node

[0108]

[0109] The power demand of power users 3, 4, and 5 is 120MW, 80MW, and 100MW respectively, and the total line loss is 5MW. The declaration information of the power generation module and the modified transaction price according to the line loss coefficient are shown in Table 3.

[0110] Table 3 Power generation module information

[0111] Generator Set 1 2 3 5 Declared electricity / MW 100 80 70 70 Transaction electricity price / ￥ 10 15 15 15 Corrected transaction price / ￥ 10 14.4 15.75 15.45

[0112] The trading center module performs centralized trading sorting according to the revised trading electricity price of the power generation module. The results are shown in Table 4.

[0113] Table 4 Power generation module bidding results

[0114] Corrected transaction price / ￥ Generator Set Cleared electricity / MW Cumulative amount / MW 10 1 100 100 14.4 2 80 180 15.45 5 70 250 15.75 3 55 305

[0115] The clearing price of system electricity is 15￥ / MW.

[0116] The bidding results show that when the original transaction price is the same, the revised transaction price of the generator set that contributes more to the system line loss is higher and the cleared electricity is less. Therefore, the generator set that contributes more to the line loss should reduce its transaction price in order to obtain more cleared electricity. This method can also affect the site selection of power plants, encouraging power plants to be built in load centers with small node line loss coefficients.

[0117] The line loss costs borne by various types of electricity users are shown in Table 5.

[0118] Table 5 Line loss cost of user module

[0119]

[0120] The total line loss cost that the actual user module should bear is 45￥, and a surplus of 50.4￥ is generated from the line loss fees that the user module should collect. It is distributed to each industrial and commercial user in proportion according to the above method. The industrial and commercial users at node 3 receive 27.49￥, and the industrial and commercial users at node 5 receive 22.91￥.

[0121] Embodiment 4:

[0122] An embodiment of the present invention provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the steps of the line loss allocation and settlement method for power trading in the above-mentioned embodiment 2 are implemented.

[0123] Embodiment 5:

[0124] An embodiment of the present invention provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the steps of the line loss allocation and settlement method for power trading in the above-mentioned embodiment 2.

[0125] Those skilled in the art know that, in addition to realizing the system and its various devices, modules, and units provided by the present invention in a purely computer-readable program code, it is entirely possible to realize the same functions in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers by logically programming the method steps. Therefore, the system and its various devices, modules, and units provided by the present invention can be considered as a hardware component, and the devices, modules, and units included therein for realizing various functions can also be regarded as structures within the hardware component; the devices, modules, and units for realizing various functions can also be regarded as both software modules for realizing the method and structures within the hardware component.

[0126] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0127] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A line loss allocation and settlement system for power trading, characterized in that: include: Power generation module, trading center module, power grid company module and user module; The power generation module is used to collect the declared power and transaction power price of each power generation group, and receive the line loss coefficient from the transaction center module. Each power generation group corrects the transaction power price according to the line loss coefficient of the corresponding node, and sends the corrected transaction power price and the declared power to the transaction center module; The user module is used to collect the electricity demand of each power user and send the electricity demand to the trading center module; The trading center module is used to receive the declared power and transaction power price of each generator set, as well as the power demand of each power user, calculate the line loss coefficient of each node based on the power grid operation model and send it to the power generation module, perform centralized trading sorting on the declared power of the generator set according to the transaction power price, and calculate the line loss cost of each power user in combination with the clearing power price, the power demand and the line loss coefficient, and send it to the power grid company module; The power grid company module is used to receive the line loss fee of each user, collect fees from the user side, and redistribute the line loss fee surplus collected from the user side according to the line loss fee under actual operation conditions.

2. A line loss allocation and settlement method for power trading, using the line loss allocation and settlement system for power trading according to claim 1, characterized in that: The steps include: Step S1, the power generation module collects the declared power and transaction power price of each power generation group and sends them to the trading center module, and the user module collects the power demand of each power user and sends them to the trading center module; Step S2, the trading center module calculates the line loss coefficient of each node based on the power grid operation model, and sends the line loss coefficient of each node to the power generation module; Step S3, the power generation module receives the line loss coefficient, and each of the power generation groups corrects the transaction electricity price to obtain a corrected transaction electricity price, and sends the corrected transaction electricity price to the transaction center module; Step S4, the trading center module performs centralized trading sorting according to the received revised trading electricity price and the declared electricity quantity, calculates the bidding result in combination with the electricity demand, the bidding result includes the clearing electricity quantity and clearing electricity price of each generator set, calculates the line loss fee of each electricity user according to the bidding result and the line loss coefficient corresponding to each electricity user, and sends it to the power grid company module; Step S5, the grid company module receives the line loss fee for each power user calculated by the trading center module, charges the user side, and redistributes the line loss fee surplus collected from the user side according to the line loss fee under actual operating conditions.

3. The line loss allocation and settlement method for power trading according to claim 2, characterized in that: In step S2, the trading center module calculates the line loss coefficient of each node based on the power grid operation model by: The line loss coefficient of each node is set as the effect of the unit power injected or extracted by each node on the change of the loss of the whole system: Where ΔP i The change in unit power injected or extracted for node i, ΔP L The line loss coefficient at the balance node is defined as the change in the line loss of the whole system. For power generation modules, The impact of unit power injected into each node on the change of system loss; for user modules, Extract the effect of unit power on the change of system loss for each node, i = 1, 2, ..., m, m is the number of nodes; The line loss coefficient is obtained by simulating the unit changes of power generation and load at each node in turn. The trading center module uses the measurement data and network data samples every half hour in the previous month to calculate. The line loss coefficient of each node each month takes the average of the 1440 half-hour line loss coefficients of the previous month. On the first day of each month, the trading center module will announce the latest line loss coefficients of each node in the system.

4. The line loss allocation and settlement method for power trading according to claim 2, characterized in that: In step S3, the method in which the power generation module corrects the transaction electricity price based on the line loss coefficient to obtain the corrected transaction electricity price is: Among them, λ i is the transaction price of the i-th generator set, λ ′ i is the revised transaction price of the i-th generator set, When the electricity price is revised, it will be higher and less competitive in transaction sorting; When , the revised transaction electricity price will be lower and more competitive in transaction sorting, i = 1, 2, ..., n, n is the number of generating units.

5. The line loss allocation and settlement method for power trading according to claim 2, characterized in that: The step S4 includes the following sub-steps: S4.1, the trading center module performs centralized trading sorting on the generator sets based on the revised trading electricity price, and calculates the clearing electricity quantity and clearing electricity price of each generator set in combination with the electricity demand; S4.2, the trading center module calculates the line loss cost of each power user according to the cleared power and cleared power price of each generator set and the line loss coefficient corresponding to each power user.

6. The line loss allocation and settlement method for power trading according to claim 5, characterized in that: In step S4.1, the trading center module performs centralized trading sorting on the generator sets based on the revised trading electricity price, and obtains the clearing electricity quantity and clearing electricity price of each generator set by: The generators are sorted from low to high according to the bidding prices to form a seller sequence. Combined with the electricity demand, the trading center module accumulates the declared power of the generators. When the accumulated sum of the declared power of the generators meets the electricity demand, the market clearing price λ is obtained. ′ s The matching power of each generator set, i.e. the clearing power; Assume the clearing price λ0 of the system electricity energy is: Where s is the number of generator sets.

7. The line loss allocation and settlement method for power trading according to claim 5, characterized in that: In step S4.2, the trading center module settles the line loss fee for the user module according to the cleared electricity quantity and cleared electricity price of each generator set and the line loss coefficient corresponding to each power user, and sets 40% of the line loss fee to be borne by the power grid company and 60% to be borne by the power user; According to the differences in electricity users, the electricity users include residents, agricultural users and industrial and commercial users. The settlement method is as follows: The residential and agricultural users are priority electricity users and do not bear line loss costs. The line loss costs of the residential and agricultural users are all borne by the industrial and commercial users; The line loss costs borne by industrial and commercial users are: Among them, C i is the line loss fee that the i-th industrial and commercial user needs to pay, q i is the electricity demand of the i-th industrial and commercial user, q j The jth resident or agricultural user's electricity demand, m is the total number of residents and agricultural users, n is the total number of industrial and commercial users, and each industrial and commercial user bears the total bus loss cost of residents and agricultural users based on the proportion of its own electricity demand to the total industrial and commercial users' electricity demand.

8. The line loss allocation and settlement method for power trading according to claim 7, characterized in that: In step S5, the total line loss cost under actual operation is calculated, and the surplus generated by the line loss cost collected from the user module is redistributed and returned to each industrial and commercial user, in the following method: C r =P L ×λ0×0.6 (5) ΔC=C a -C r (7) Among them, C r is the total line loss cost that the user module should bear during actual operation, C a is the line loss fee to be collected from the user module, ΔC is the surplus generated by the line loss fee to be collected from the user module exceeding the total line loss fee, C ib The line loss income surplus allocated to each industrial and commercial user, P L is the line loss of the whole system.

9. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the line loss allocation and settlement method for power trading described in any one of claims 2 to 8 are implemented.

10. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the computer program is executed by a processor, the steps of the line loss allocation and settlement method for power trading described in any one of claims 2 to 8 are implemented.

Images