CN109948872B - A real-time dispatching method and system for wind power abandonment transactions - Google Patents

Abstract

The invention provides a real-time scheduling method and a real-time scheduling system for wind power rejection transaction, which are used for collecting wind power prediction results, calculating and issuing wind rejection information according to the wind power prediction results and wind power acceptance capacity; the power transaction scheduling platform performs power subscription according to the released wind abandoning information; and determining a power dispatching plan according to the power subscription information. The method and the device fully consider the abandoned wind power which can be used for electric heating, realize the clean heating of the abandoned wind power cross-regional level and the cross-regional transaction under the same regional level through the scheme, greatly improve the utilization rate of wind energy and electric energy, and are effective measures for solving the problem of new energy consumption and promoting the development of green low carbon.

Description

A real-time dispatching method and system for wind power abandonment transactions

Technical field

The invention belongs to the field of power systems, and specifically relates to a real-time dispatching method and system for wind power abandonment transactions.

Background technique

Driven by energy strategies and policies, new energy power generation such as wind power has grown from scratch, from small to large, and its installed capacity and power generation volume currently rank among the top in the world. However, wind power generation has the characteristics of randomness, volatility and intermittentness. Wind power consumption is directly affected by the regulation ability of conventional power sources. When the fluctuation range of wind power output exceeds the regulation capacity of the power grid, it will lead to wind curtailment.

In some areas, thermal power units, especially combined heat and power units, account for a high proportion. Under the demand for heating in winter, combined heat and power units generally operate in the "heat-based power generation" mode, and the power supply peak-shaving capacity is significantly reduced. The active power balance between heating and power grids has forced a large amount of wind power to be abandoned, which seriously affects the acceptance of wind power.

The current grid power consumption is only balanced within the same regional level. Without special policy provisions, power generation is usually consumed at the same regional level. In some areas, due to limited load space and insufficient space for new energy consumption, wind curtailment is a serious problem.

According to data released by the Energy Bureau, the wind curtailment rate in many places exceeded 20% in 2016. The above-mentioned areas were listed as red warning areas for wind power development, and the approval of new wind power projects was suspended.

Affected by resource endowments, conventional energy sources such as coal are the main source of heating. In some areas, low-efficiency small-scale heating methods such as scattered small boilers and small heating stoves are used, which aggravates air pollutant emissions during the winter heating period.

Contents of the invention

Taking into account the limitations of power grid regulation when the wind power output fluctuation range is exceeded due to the randomness, volatility and intermittent nature of wind power, the present invention proposes a real-time dispatching method and system for abandoned wind power transactions, making full use of abandoned wind power investment in early warning areas. Wind power, the implementation of clean heating at the cross-regional level of wind power abandonment, and cross-regional transactions at the same regional level can, on the one hand, improve the utilization rate of wind power, and on the other hand, achieve energy conservation and emission reduction. Heating methods, solving new energy consumption, are effective measures to promote green and low-carbon development.

The technical solution provided by the invention is:

A real-time scheduling method for wind power abandonment transactions, the method includes:

Collect wind power prediction results;

Calculate and publish wind curtailment information based on the wind power prediction results and wind power acceptance capacity;

The power trading and dispatching platform conducts power subscription based on the released wind curtailment information;

Determine the power dispatch plan based on power subscription information.

Preferably, the calculation and release of wind curtailment information based on wind power prediction results and wind power acceptance capacity include:

a. In the first period before the power limit moment, the wind curtailment information is determined based on the wind power prediction results and the size of the wind power reception capacity;

b. In the second period from the power limit moment, use the priority dispatch evaluation system to detect whether the wind curtailment information complies with the new energy priority dispatch principle; if not, it will prompt to modify the wind curtailment information and return to step a;

c. Read the actual wind power output in the third period from the power limit moment. If the wind farm is already in the power limit state at this time, read the theoretical wind power power;

d. The difference between the actual wind power output/theoretical power of wind power and the wind power curtailment is regarded as the real-time wind curtailment power, and the points of the real-time wind power curtailment are regarded as the real-time wind curtailment power, and are released to the power trading dispatching platform within a predetermined time range; wherein , the first time period>the second time period>the third time period.

Further, determining the wind curtailment information based on the wind power prediction results and the wind power acceptance capacity includes: comparing the wind power power prediction value with the wind power acceptance capacity. When the wind power prediction value is greater than the wind power acceptance capacity, the excess is set to For the initial wind curtailment power, the integral of the initial wind curtailment power is used as the initial wind curtailment power, and the initial wind curtailment power and the wind curtailment power constitute the wind curtailment information.

Preferably, the power trading and dispatching platform conducts power subscription based on the published wind curtailment information, including:

In the fourth period before the power limit, the electric heating users read the wind curtailment information and issued a subscription intention within the predetermined time range.

Electric power trading and dispatching platform;

In the fifth period from the power limit moment, if the subscribed power is less than the real-time wind curtailment power, the power trading dispatching platform will release the subscription confirmation information to the electric heating users, and allocate the unsubscribed real-time wind curtailment power to the wind farm AGC control platform; if the subscribed power exceeds the real-time wind curtailment power, the subscription confirmation information will be released to the electric heating users; wherein, the fourth period > the fifth period.

Preferably, the determining the power dispatch plan based on the power subscription information includes:

Determine the wind curtailment trading results based on the wind curtailment information and the available transmission space of tie lines used for wind curtailment power trading;

The tie line plan curve will be revised based on the wind power curtailment trading results.

Further, the determination of wind power trading results includes:

After obtaining the subscription confirmation information, in the fourth period from the power curtailment time, the power trading dispatching platform is used to read the expected transmission power value of the tie line at the power curtailment time, and calculate the available transmission space of the tie line for wind curtailment power trading;

The power trading dispatching platform is used to compare the available transmission space of the tie line with the real-time wind power curtailment, and the minimum value between the two is taken as the wind power curtailment trading result, and is released to the electric heating users participating in the wind curtailment power transaction in real time.

Further, the available power transmission space of the tie line is determined by the following formula:

P _e =min{P _{l_max} -P _a ,P _r } (1)

In the formula, P _e is the available transmission space of the tie line for real-time wind power trading, P _a is the expected value of the tie line transmission power at the time of power limit, P _{l_max} -P _a represents the remaining transmission capacity of the tie line, and P _r is the tie line adjustment. parameter.

Further, the wind curtailment power trading result is determined by the following formula:

P _t =min{P _c ,P _e } (2).

Further, the revised tie line plan curve based on the wind power curtailment trading results includes:

1) If the wind power curtailment transaction occurs in the fifth period from the power limit moment, proceed to the next step, otherwise the wind power curtailment transaction will be terminated;

2) At the fifth period from the power limit moment, the wind power abandonment transaction value is superimposed on the original tie line transmission power expectation value to obtain a new cross-province and cross-region tie line power expectation value;

3) During the power limit moment, record relevant information on abandoned wind power transactions in real time, including recording actual wind power output, transaction time, theoretical wind power output and actual power consumption of electric heating users; if the actual power consumption does not exceed the curtailed wind power subscription results , then confirm that the transaction power is equal to the actual power consumption of the electric heating user; if the actual power consumption is greater than the subscribed wind power curtailment result, the portion exceeding the subscribed wind power curtailment will be settled according to the normal market electricity price.

A real-time dispatching system for wind power abandonment transactions, including:

Collection module, used to collect wind power prediction results;

A calculation module for the power trading dispatching platform to calculate and publish wind curtailment information based on the wind power prediction results and wind power acceptance capacity;

The subscription module is used to subscribe for electricity based on the published wind curtailment information;

The determination module is used to determine the power dispatch plan based on the power subscription information.

Preferably, the calculation module includes:

The acquisition unit is used to determine the wind curtailment information based on the wind power prediction results and the size of the wind power acceptance capacity during the first period from the power limit moment;

The evaluation unit is used in the second period from the power limit moment to use the priority dispatch evaluation system to detect whether the wind curtailment information complies with the new energy priority dispatch principle; if not, it prompts to modify the wind curtailment information and returns to step a;

The reading unit is used to read the actual wind power output in the third period from the power limit moment. If the wind farm is already in the power limit state at this time, read the theoretical power of the wind power;

A definition unit for taking the difference between actual wind power output/theoretical wind power and wind power curtailment as real-time wind curtailment power, and the integral of the real-time wind power curtailment as real-time wind curtailment power, and publishing it to the power trading dispatch within a predetermined time range. platform.

Preferably, the subscription module includes:

The transmission unit is used for electric heating users to read the wind curtailment information during the fourth period from the power limit time, and send the subscription intention to the power trading dispatch platform within the predetermined time range;

The dispatching unit is used in the fifth period from the power limit moment. If the subscribed power is less than the real-time wind curtailment power, the power trading dispatching platform will release the subscription confirmation information to the electric heating users and allocate the unsubscribed real-time wind curtailment power to Wind farm AGC control platform; if the subscribed power exceeds the real-time curtailment of wind power, the subscription confirmation information will be released to electric heating users.

Preferably, the determining module includes:

A trading unit, configured to determine the result of the wind power curtailment transaction based on the wind curtailment information and the available power transmission space of the tie line used for wind curtailment power trading;

The revision unit is used to revise the tie line plan curve based on the wind curtailment power trading results.

Further, the transaction unit includes:

The calculation subunit is used to obtain the subscription confirmation information and use the power trading dispatching platform to read the expected transmission power of the tie line at the time of power curtailment in the fourth period from the power curtailment time, and calculate the available power transmission of the tie line for wind power curtailment trading. space;

The comparison subunit is used to use the power trading dispatching platform to compare the available transmission space of the tie line with the real-time wind power curtailment, take the minimum value between the two as the wind power curtailment transaction result, and publish it in real time to the power grid participating in the wind curtailment power transaction. Heating users.

Further, the revision unit includes:

The processing subunit is used for the fifth period from the power limit moment. If a wind power curtailment transaction occurs, proceed to the next step; otherwise, end the wind power curtailment transaction;

The update subunit is used to superimpose the wind power abandonment transaction value on the basis of the original tie line transmission power expectation value in the fifth period from the power limit moment to obtain the new cross-province and cross-region tie line power expectation value;

The recording subunit is used to record relevant information on wind power abandonment transactions in real time during power restrictions, including recording actual wind power output, transaction time, theoretical wind power output and actual power consumption of electric heating users;

The determination subunit is used to confirm that the transaction power is equal to the actual power consumption of the electric heating user if the actual power consumption does not exceed the wind power subscription result; if the actual power consumption is greater than the wind power subscription result, then the transaction amount exceeds the wind power subscription result. The part of the abandoned wind power subscribed will be settled according to the normal market electricity price.

Compared with the closest prior art, the present invention has the following significant improvements:

Taking into account the limitations of power grid regulation when the wind power output fluctuation range is exceeded due to the randomness, volatility and intermittency of wind power, the present invention provides a real-time dispatching method and system for wind power abandonment transactions, which serves as a market for cross-regional wind power abandonment transactions. Provide reference for the design, make full use of the wind power output in wind power investment warning areas, implement clean heating at cross-regional levels of abandoned wind power, as well as cross-regional transactions at the same regional level, and collect wind power prediction results;

Calculate and release wind curtailment information based on wind power prediction results and wind power acceptance capacity; the power trading dispatch platform conducts power subscription based on the released wind curtailment information; and determines the power dispatch plan based on the power subscription information. On the one hand, it improves the utilization rate of wind power, and on the other hand, it can achieve energy conservation and emission reduction. It is an effective measure to promote green and low-carbon development by solving the problem of new energy consumption through the heating method of abandoned wind power across regional levels.

Description of the drawings

Figure 1 is a general flow chart provided in the specific embodiment of the present invention;

Figure 2 is a real-time scheduling flow chart of wind power abandonment transactions provided in the specific embodiment of the present invention;

Figure 3 is a schematic time window diagram of the real-time dispatching process of abandoned wind power and heating provided in the specific embodiment of the present invention.

Detailed ways

In order to better understand the present invention, the content of the present invention will be further described below in conjunction with the accompanying drawings and examples.

The present invention proposes a real-time dispatching method and system for wind power abandonment transactions. Through the implementation of the solution of the present invention, transactions of abandoned wind power at different regional levels and in different regions can be realized, thereby expanding the trading scope of abandoned wind power and improving the profitability of users of wind farms, electric heating and thermal storage electric heating.

As shown in Figures 1 and 2, the real-time scheduling method for wind power abandonment transactions specifically includes the following steps. The time window diagram of each step is shown in Figure 3, including:

S1 collects wind power prediction results;

S2 calculates and publishes wind curtailment information based on the wind power prediction results and wind power acceptance capacity;

The S3 power trading and dispatching platform conducts power subscription based on the released wind curtailment information;

S4 determines the power dispatch plan based on the power subscription information.

In step S2, wind power curtailment information is calculated and released based on the wind power prediction results and wind power acceptance capacity, including:

a. In the first period before the power limit moment, the wind curtailment information is determined based on the wind power prediction results and the size of the wind power reception capacity;

b. In the second period from the power limit moment, use the priority dispatch evaluation system to detect whether the wind curtailment information complies with the new energy priority dispatch principle; if not, it will prompt to modify the wind curtailment information and return to step a;

c. Read the actual wind power output in the third period from the power limit moment. If the wind farm is already in the power limit state at this time, read the theoretical wind power power;

d. The difference between the actual wind power output/theoretical power of wind power and the curtailed wind power is regarded as the real-time curtailed wind power, and the points of the real-time curtailed wind power are regarded as the real-time curtailed wind power, and are published to the power trading dispatching platform within a predetermined time range. Among them, the first time period > the second time period > the third time period, the first, second, and third time periods can be set to 15 minutes, 13 minutes, and 5 minutes respectively; in addition, the predetermined time range is usually set to 1 minute.

In step a, the wind curtailment information is determined based on the wind power prediction results and the wind power acceptance capacity, including: comparing the wind power power prediction value with the wind power acceptance capacity. When the wind power prediction value is greater than the wind power acceptance capacity, the excess part is set as the initial value. For wind power curtailment, the integral of the initial wind power curtailment is used as the initial wind curtailment power, and the initial wind curtailment power and the wind curtailment power constitute the wind curtailment information.

In step S3, the power trading and dispatching platform conducts power subscription based on the released wind curtailment information, including:

In the fourth period before the power limit, the electric heating user reads the wind curtailment information and sends a subscription intention to the electricity within 1 minute.

Power trading scheduling platform;

At the fifth period from the power limit moment, if the subscribed power is less than the real-time curtailed wind power, the power trading dispatching platform will release the subscription confirmation information to the electric heating users, and allocate the unsubscribed real-time wind curtailed power to the wind farm AGC control platform ; If the subscribed power exceeds the real-time wind power curtailment, the subscription confirmation information will be released to the electric heating users. Among them, the fourth time period > the fifth time period, the fourth and fifth time periods can be set to 4min and 3min respectively;

In step S4, determining the power dispatch plan based on the electric power subscription information includes:

4-1 Determine the wind curtailment trading results based on the wind curtailment information and the available transmission space of tie lines used for wind curtailment power trading;

4-2 Revise the tie line planning curve based on the wind curtailment power trading results.

In step 4-1, determine the wind power curtailment trading results, including:

After obtaining the subscription confirmation information, 4 minutes before the power curtailment time, that is, the fourth period from the power curtailment time, use the power trading dispatching platform to read the expected transmission power value of the tie line at the power curtailment time, and calculate the available tie line for wind power trading. transmission space;

The power trading dispatching platform is used to compare the available transmission space of the tie line with the real-time wind power curtailment, and the minimum value between the two is taken as the wind power curtailment trading result, and is released to the electric heating users participating in the wind curtailment power transaction in real time. The electric heating users mentioned here mainly refer to thermal storage electric heating users.

The available transmission space for tie lines is determined by the following formula:

P _e =min{P _{l_max} -P _a ,P _r } (1)

In the formula, P _e is the available transmission space of the tie line for real-time wind power trading, P _a is the expected value of the tie line transmission power at the time of power limit, P _{l_max} -P _a represents the remaining transmission capacity of the tie line, and P _r is the tie line adjustment. parameter.

The wind curtailment power trading result is determined by the following formula:

P _t =min{P _c ,P _e } (2).

In step 4-2, revising the tie line plan curve based on the wind power curtailment trading results includes:

1) 3 minutes before the power limit time, that is, the fifth period from the power limit time; if the wind power curtailment transaction occurs, proceed to the next step, otherwise the wind power curtailment transaction will be terminated;

2) When 3 minutes away from the power limit moment, the wind power abandonment transaction value is superimposed on the original tie line transmission power expectation value to obtain a new cross-province and cross-region tie line power expectation value;

3). During the power limit moment, record relevant information on abandoned wind power transactions in real time, including recording actual wind power output, transaction time, theoretical wind power output and actual power consumption of electric heating users; if the actual power consumption does not exceed the abandoned wind power subscription As a result, it is confirmed that the transaction power is equal to the actual power consumption of the electric heating user; if the actual power consumption is greater than the subscribed wind power curtailment result, the part exceeding the subscribed wind power curtailment will be settled according to the normal market electricity price.

Based on the technical concept of the same invention, this application also provides a real-time dispatching system for wind power abandonment transactions, including:

Collection module, used to collect wind power prediction results;

A calculation module used by the power trading dispatching platform to calculate and publish wind curtailment information based on the wind power prediction results and wind power acceptance capacity;

The subscription module is used to subscribe for electricity based on the published wind curtailment information;

The determination module is used to determine the power dispatch plan based on the power subscription information.

Among them, the computing modules include:

The acquisition unit is used to determine the wind curtailment information based on the wind power prediction results and the size of the wind power acceptance capacity during the first period from the power limit moment;

The evaluation unit is used in the second period from the power limit moment to use the priority dispatch evaluation system to detect whether the wind curtailment information complies with the new energy priority dispatch principle; if not, it prompts to modify the wind curtailment information and returns to step a;

The reading unit is used to read the actual wind power output in the third period from the power limit moment. If the wind farm is already in the power limit state at this time, read the theoretical power of the wind power;

A definition unit for taking the difference between actual wind power output/theoretical wind power and wind power curtailment as real-time wind curtailment power, and the integral of the real-time wind power curtailment as real-time wind curtailment power, and publishing it to the power trading dispatch within a predetermined time range. platform.

Subscription modules include:

The transmission unit is used for electric heating users to read the wind curtailment information during the fourth period from the power limit time, and then

Send the subscription intention to the power trading dispatch platform within the time range;

The dispatching unit is used in the fifth period from the power limit moment. If the subscribed power is less than the real-time wind curtailment power, the power trading dispatching platform will release the subscription confirmation information to the electric heating users and allocate the unsubscribed real-time wind curtailment power to Wind farm AGC control platform; if the subscribed power exceeds the real-time curtailment of wind power, the subscription confirmation information will be released to electric heating users.

Determined modules include:

A trading unit, configured to determine the result of the wind power curtailment transaction based on the wind curtailment information and the available power transmission space of the tie line used for wind curtailment power trading;

The transaction unit also includes: a calculation subunit, which is used to obtain the subscription confirmation information and use the power trading dispatching platform to read the expected value of the tie line transmission power at the power limit time during the fourth period from the power limit time, and calculate the wind power for curtailment. The available power transmission space of the transaction tie line; the comparison subunit is used to compare the available power transmission space of the tie line with the real-time wind power curtailment using the power trading dispatching platform, take the minimum value of the two as the wind power curtailment transaction result, and publish it in real time To electric heating users participating in wind power curtailment transactions.

The revision unit is used to revise the tie line plan curve based on the wind curtailment power trading results.

The revision unit also includes: a processing subunit, which is used to proceed to the next step if a wind power curtailment transaction occurs in the fifth period from the power rationing moment; otherwise, the current wind power curtailment transaction is terminated; an update subunit, which is used to rectify the wind power curtailment time period. In the fifth period of time, the wind power abandonment transaction value is superimposed on the original tie line transmission power expectation value to obtain the new inter-provincial and cross-region tie line power expectation value; the recording sub-unit is used to record the wind power abandonment transaction in real time during the power limit moment. Relevant information, including recording actual wind power output, transaction time, theoretical wind power output and actual power consumption of electric heating users; the determination subunit is used to confirm that if the actual power consumption does not exceed the wind power subscription result, the transaction power is equal to The actual power consumption of electric heating users; if the actual power consumption is greater than the subscribed wind power curtailment result, the portion exceeding the subscribed wind power curtailment will be settled according to the normal market electricity price.

Those skilled in the art will understand that embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment that combines software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each process and/or block in the flowchart illustrations and/or block diagrams, and combinations of processes and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine, such that the instructions executed by the processor of the computer or other programmable data processing device produce a use A device for realizing the functions specified in one process or multiple processes of the flowchart and/or one block or multiple blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory that causes a computer or other programmable data processing apparatus to operate in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction means, the instructions The device implements the functions specified in a process or processes of the flowchart and/or a block or blocks of the block diagram.

These computer program instructions may also be loaded onto a computer or other programmable data processing device, causing a series of operating steps to be performed on the computer or other programmable device to produce computer-implemented processing, thereby executing on the computer or other programmable device. Instructions provide steps for implementing the functions specified in a process or processes of a flowchart diagram and/or a block or blocks of a block diagram.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that the present invention can still be modified. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention shall be covered by the scope of the claims of the present invention.

Claims (11)

1. A real-time scheduling method for wind power curtailment transactions, characterized in that the method includes: Collect wind power prediction results; Calculate and publish wind curtailment information based on the wind power prediction results and wind power acceptance capacity; The power trading and dispatching platform conducts power subscription based on the released wind curtailment information; Determine the power dispatch plan based on power subscription information; Determining the power dispatch plan based on the power subscription information includes: Determine the wind curtailment trading results based on the wind curtailment information and the available transmission space of tie lines used for wind curtailment power trading; Revise the tie line planning curve based on the wind power curtailment trading results; The revised tie line plan curve based on the wind power curtailment trading results includes: 1) If the wind power curtailment transaction occurs in the fifth period from the power limit moment, proceed to the next step, otherwise the wind power curtailment transaction will be terminated; 2) At the fifth period from the power limit moment, the wind power abandonment transaction value is superimposed on the original tie line transmission power expectation value to obtain a new cross-province and cross-region tie line power expectation value; 3) During the power limit moment, record relevant information on abandoned wind power transactions in real time, including recording actual wind power output, transaction time, theoretical wind power output and actual power consumption of electric heating users; if the actual power consumption does not exceed the curtailed wind power subscription results , then confirm that the transaction power is equal to the actual power consumption of the electric heating user; if the actual power consumption is greater than the subscribed wind power curtailment result, the portion exceeding the subscribed wind power curtailment will be settled according to the normal market electricity price. 2. The method according to claim 1, characterized in that calculating and publishing wind curtailment information based on wind power prediction results and wind power acceptance capacity includes: a. In the first period before the power limit moment, the wind curtailment information is determined based on the wind power prediction results and the size of the wind power reception capacity; b. In the second period from the power limit moment, use the priority dispatch evaluation system to detect whether the wind curtailment information complies with the new energy priority dispatch principle; if not, it will prompt to modify the wind curtailment information and return to step a; c. Read the actual wind power output in the third period from the power limit moment. If the wind farm is already in the power limit state at this time, read the theoretical wind power power; d. The difference between the actual wind power output/theoretical power of wind power and the wind power curtailment is regarded as the real-time wind curtailment power, and the points of the real-time wind power curtailment are regarded as the real-time wind curtailment power, and are released to the power trading dispatching platform within a predetermined time range; wherein , the first time period>the second time period>the third time period. 3. The method according to claim 2, wherein determining the wind curtailment information based on the wind power prediction result and the wind power acceptance capacity includes: comparing the wind power power prediction value with the wind power acceptance capacity. When the wind power prediction value When it is greater than the wind power reception capacity, the excess part is set as the initial wind power curtailment, and the integral of the initial wind power curtailment is used as the initial wind power curtailment. The initial wind power curtailment and the wind power curtailment constitute the wind curtailment information. 4. The method according to claim 1, characterized in that the power trading and dispatching platform conducts power subscription based on the published wind curtailment information, including: In the fourth period from the power limit time, electric heating users read wind curtailment information and send subscription intentions to the power trading dispatch platform within the predetermined time range; In the fifth period from the power limit moment, if the subscribed power is less than the real-time wind curtailment power, the power trading dispatching platform will release the subscription confirmation information to the electric heating users, and allocate the unsubscribed real-time wind curtailment power to the wind farm AGC control platform; if the subscribed power exceeds the real-time wind curtailment power, the subscription confirmation information will be released to the electric heating users; wherein, the fourth period > the fifth period. 5. The method according to claim 1, characterized in that determining the wind power curtailment trading result includes: After obtaining the subscription confirmation information, in the fourth period from the power curtailment time, the power trading dispatching platform is used to read the expected transmission power value of the tie line at the power curtailment time, and calculate the available transmission space of the tie line for wind curtailment power trading; The power trading dispatching platform is used to compare the available transmission space of the tie line with the real-time wind power curtailment, and the minimum value between the two is taken as the wind power curtailment trading result, and is released to the electric heating users participating in the wind curtailment power transaction in real time. 6. The method according to claim 1, characterized in that the available power transmission space of the tie line is determined by the following formula: P _e =min{P _{l_max} -P _a ,P _r } (1) In the formula, P _e is the available transmission space of the tie line for real-time wind power trading, P _a is the expected value of the tie line transmission power at the time of power limit, P _{l_max} -P _a represents the remaining transmission capacity of the tie line, and P _r is the tie line adjustment. parameter. 7. The method according to claim 5, characterized in that the wind power curtailment trading result is determined by the following formula: P _t =min{P _c ,P _e } (2). 8. A real-time dispatching system for wind power curtailment transactions, which is characterized by including: Collection module, used to collect wind power prediction results; A calculation module used by the power trading dispatching platform to calculate and publish wind curtailment information based on the wind power prediction results and wind power acceptance capacity; The subscription module is used to subscribe for electricity based on the published wind curtailment information; The determination module is used to determine the power dispatch plan based on the power subscription information; The determination module includes: A trading unit, configured to determine the result of the wind power curtailment transaction based on the wind curtailment information and the available power transmission space of the tie line used for wind curtailment power trading; The revision unit is used to revise the tie line plan curve based on the wind curtailment power trading results; The revised units include: The processing subunit is used for the fifth period from the power limit moment. If a wind power curtailment transaction occurs, proceed to the next step; otherwise, end the wind power curtailment transaction; The update subunit is used to superimpose the wind power abandonment transaction value on the basis of the original tie line transmission power expectation value in the fifth period from the power limit moment to obtain the new cross-province and cross-region tie line power expectation value; The recording subunit is used to record relevant information on wind power abandonment transactions in real time during power restrictions, including recording actual wind power output, transaction time, theoretical wind power output and actual power consumption of electric heating users; The determination subunit is used to confirm that the transaction power is equal to the actual power consumption of the electric heating user if the actual power consumption does not exceed the wind power subscription result; if the actual power consumption is greater than the wind power subscription result, then the transaction amount exceeds the wind power subscription result. The part of the abandoned wind power subscribed will be settled according to the normal market electricity price. 9. The system according to claim 8, wherein the computing module includes: The acquisition unit is used to determine the wind curtailment information based on the wind power prediction results and the size of the wind power acceptance capacity during the first period from the power limit moment; The evaluation unit is used in the second period from the power limit moment to use the priority dispatch evaluation system to detect whether the wind curtailment information complies with the new energy priority dispatch principle; if not, it prompts to modify the wind curtailment information and returns to step a; The reading unit is used to read the actual wind power output in the third period from the power limit moment. If the wind farm is already in the power limit state at this time, read the theoretical power of the wind power; A definition unit for taking the difference between actual wind power output/theoretical wind power and wind power curtailment as real-time wind curtailment power, and the integral of the real-time wind power curtailment as real-time wind curtailment power, and publishing it to the power trading dispatch within a predetermined time range. platform. 10. The system according to claim 8, characterized in that the subscription module includes: The transmission unit is used for electric heating users to read the wind curtailment information during the fourth period from the power limit time, and send the subscription intention to the power trading dispatch platform within the predetermined time range; The dispatching unit is used in the fifth period from the power limit moment. If the subscribed power is less than the real-time wind curtailment power, the power trading dispatching platform will release the subscription confirmation information to the electric heating users and allocate the unsubscribed real-time wind curtailment power to Wind farm AGC control platform; if the subscribed power exceeds the real-time curtailment of wind power, the subscription confirmation information will be released to electric heating users. 11. The system according to claim 8, characterized in that the transaction unit includes: The calculation subunit is used to obtain the subscription confirmation information and use the power trading dispatching platform to read the expected transmission power of the tie line at the time of power curtailment in the fourth period from the power curtailment time, and calculate the available power transmission of the tie line for wind power curtailment trading. space; The comparison subunit is used to use the power trading dispatching platform to compare the available transmission space of the tie line with the real-time wind power curtailment, take the minimum value between the two as the wind power curtailment transaction result, and publish it in real time to the power grid participating in the wind curtailment power transaction. Heating users.