CN109948872B - Real-time scheduling method and system for abandoned wind power transaction - Google Patents
Real-time scheduling method and system for abandoned wind power transaction Download PDFInfo
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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
Technical Field
The invention belongs to the field of power systems, and particularly relates to a real-time scheduling method and system for wind power rejection trading.
Background
Under the guidance of energy strategy and policy driving, new energy power generation such as wind power and the like is carried out from none to big, from small to big, and the installed scale and the generated energy are in the forefront of the world at present. However, wind power generation has the characteristics of randomness, volatility, intermittence and the like, wind power consumption is directly affected by the adjusting capability of a conventional power supply, and wind power is abandoned when the fluctuation range of wind power output exceeds the adjusting capability of a power grid.
The thermal power generating units, particularly the cogeneration units in partial areas have higher occupation ratio, the cogeneration units generally operate in a 'heat and electricity setting' mode under the heat supply requirement in winter, the power peak regulation capability is obviously reduced, and in order to ensure the active balance of heat supply and a power grid in the load valley period, a large amount of wind is abandoned, so that the acceptance of wind power is seriously influenced.
The current power grid power consumption only realizes balance in the same regional level, and if no special policy prescribes, the power generation electric quantity is mainly consumed in the same regional level. And the load space of the region is limited in part of the region, so that the new energy consumption space is insufficient, and the wind abandoning problem is serious.
The data released by the energy bureau show that the wind rejection rate exceeds 20% in 2016, and the regions are listed as red early warning areas for wind power development, so that new wind power projects are approved temporarily.
The conventional energy sources such as coal and the like are main sources of heat supply due to the influence of the endowment of resources, and the low-efficiency small heating modes such as a small-sized dispersing boiler, a small heating stove and the like are adopted in part of areas, so that the emission of air pollutants in the heating period in winter is increased.
Disclosure of Invention
Considering the limitation of grid regulation when the wind power fluctuation range is exceeded due to the randomness, the fluctuation and the intermittence of wind power; the invention provides a real-time scheduling method and a real-time scheduling system for the transaction of abandoned wind power, which fully utilize the abandoned wind power output of a wind power investment early warning area to execute clean heating of the cross-regional level of abandoned wind power and the cross-regional transaction under the same regional level, so that on one hand, the utilization rate of wind power can be improved, on the other hand, energy conservation and emission reduction can be realized, and the new energy consumption is solved by the cross-regional heating mode of the cross-regional level of abandoned wind power, thereby being an effective measure for promoting the development of green low carbon.
The technical scheme provided by the invention is as follows:
a real-time scheduling method for wind curtailment transactions, the method comprising:
collecting wind power prediction results;
calculating and issuing wind abandon information according to the wind power prediction result and the 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.
Preferably, the calculating and issuing the wind abandoning information according to the wind power prediction result and the wind power receiving capability includes:
a. determining wind abandoning information according to wind power prediction results and the magnitude of wind power admittance capacity when the distance is within a first period of the electricity limiting time;
b. when the distance from the electricity limiting moment to the second period is the same, detecting whether the abandoned wind information accords with a new energy priority scheduling principle by adopting a priority scheduling evaluation system; if not, prompting to modify the abandoned wind information, and returning to the step a;
c. reading actual wind power output in a third period of the distance electricity limiting time, and if the wind power plant is in the electricity limiting state at the moment, reading wind power theoretical power;
d. taking the difference between the actual wind power output/wind power theoretical power and the waste wind power as real-time waste wind power, taking the integral of the real-time waste wind power as real-time waste wind power, and publishing the real-time waste wind power to a power transaction scheduling platform within a preset time range; wherein the first period > the second period > the third period.
Further, the determining the wind discarding information according to the wind power prediction result and the wind power receiving capacity comprises the following steps: and comparing the wind power predicted value with the wind power receiving capacity, setting the exceeding part as initial wind discarding power when the wind power predicted value is larger than the wind power receiving capacity, taking the integral of the initial wind discarding power as initial wind discarding power, and forming wind discarding information by the initial wind discarding power and the wind discarding power.
Preferably, the power transaction scheduling platform performs power subscription according to the issued wind curtailment information, and includes:
when the distance from the electricity limiting time to the fourth time period is the fourth time period, the electric heating user reads the waste air information and sends out a subscription in a preset time range
Scheduling a platform for power supply transaction;
when the distance is the fifth period of the electricity limiting time, if the subscribed electric power is smaller than the real-time wind discarding electric power, the electric power transaction scheduling platform issues subscription confirmation information to an electric heating user, and distributes the real-time wind discarding electric power which is not subscribed to the wind power plant AGC control platform; if the purchased power exceeds the real-time abandoned wind power, issuing the purchased confirmation information to an electric heating user; wherein the fourth period > the fifth period.
Preferably, the determining the power scheduling plan according to the power subscription information includes:
determining a wind discarding power transaction result according to the wind discarding information and a power transmission space available for a tie line used for wind discarding power transaction;
and revising the tie line planning curve according to the abandoned wind power trade result.
Further, the determining the waste wind power transaction result includes:
after acquisition of subscription confirmation information, reading a power transmission expected value of the tie line at the electricity limiting moment by adopting a power transaction scheduling platform in a fourth period of time from the electricity limiting moment, and calculating an available power transmission space of the tie line for power discarding transaction;
and comparing the available transmission space of the connecting line with real-time waste wind power by adopting a power transaction scheduling platform, taking the minimum value of the available transmission space and the real-time waste wind power as a waste wind power transaction result, and issuing the waste wind power transaction result to electric heating users participating in waste wind power transaction in real time.
Further, the available transmission space of the tie line is determined by:
P e ＝min{P l_max -P a ,P r } (1)
wherein P is e Power transmission space available for tie lines for real-time wind curtailment power trade, P a Power expectancy value, P of power limit moment connecting line transmission power l_max -P a Indicating surplus power transmission capacity of connecting line, P r Parameters are adjusted for the tie-line.
Further, the discard electricity trading result is determined by:
P t ＝min{P c ,P e } (2)。
further, revising the tie-line plan curve according to the abandoned wind power trade result comprises:
1) When the distance is within a fifth period of the electricity limiting time, if the electricity discarding transaction occurs, the next step is carried out, otherwise, the electricity discarding transaction is ended;
2) When the distance is within a fifth period of the electricity limiting time, superposing a wind power rejection trading value on the basis of the expected value of the transmission power of the original tie line, and obtaining a new expected value of the power of the tie line across provinces and regions;
3) At the electricity limiting time, recording relevant information of the wind power abandon transaction in real time, wherein the relevant information comprises actual wind power output, transaction time, theoretical wind power output and actual power consumption of an electric heating user; if the actual power consumption does not exceed the electric power purchasing result of the abandoned electric power, confirming that the transaction electric quantity is equal to the actual electric quantity of the electric heating user; and if the actual power is larger than the purchased wind-discarding purchasing result, exceeding the purchased wind-discarding power part, and settling according to the normal market price.
A real-time scheduling system for wind curtailment transactions, comprising:
the collection module is used for collecting wind power prediction results;
the calculation module is used for calculating and issuing abandoned wind information according to the wind power prediction result and the wind power acceptance capacity by the power transaction scheduling platform;
the subscription module is used for carrying out electric power subscription according to the released abandoned wind information;
and the determining module is used for determining the power dispatching plan according to the power subscription information.
Preferably, the calculation module includes:
the acquisition unit is used for determining the wind abandoning information according to the wind power prediction result and the wind power acceptance capacity when the distance is within a first period of the electricity limiting time;
the evaluation unit is used for detecting whether the abandoned wind information accords with a new energy priority scheduling principle or not by adopting a priority scheduling evaluation system when the distance is a second period from the electricity limiting time; if not, prompting to modify the abandoned wind information, and returning to the step a;
the reading unit is used for reading the actual wind power output when the distance is within a third period of the electricity limiting time, and if the wind power plant is in the electricity limiting state at the moment, the wind power theoretical power is read;
the definition unit is used for taking the difference between the actual wind power output/wind power theoretical power and the waste wind power as real-time waste wind power, taking the integral of the real-time waste wind power as real-time waste wind power, and issuing the real-time waste wind power to the power transaction scheduling platform within a preset time range.
Preferably, the subscription module includes:
the transmission unit is used for reading the abandoned wind information by the electric heating user when the distance is the fourth period from the electricity limiting time, and sending the subscription intention to the electric power transaction scheduling platform within the preset time range;
the scheduling unit is used for issuing subscription confirmation information to an electric heating user and distributing the real-time wind discarding power which is not subscribed to the wind power plant AGC control platform if the subscribed power is smaller than the real-time wind discarding power when the distance from the time limit moment to the fifth period; and if the purchased power exceeds the real-time waste wind power, issuing the purchased confirmation information to the electric heating user.
Preferably, the determining module includes:
the transaction unit is used for determining a waste wind power transaction result according to the waste wind information and the available power transmission space of the tie line for waste wind power transaction;
and the revising unit is used for revising the tie-line planning curve according to the abandoned wind power trade result.
Further, the transaction unit includes:
the calculation subunit is used for reading the expected value of the power transmission power of the tie line at the electricity limiting time by adopting the power transaction scheduling platform in a fourth period of the distance electricity limiting time after acquiring the subscription confirmation information, and calculating the available power transmission space of the tie line for the power discarding transaction;
and the comparison subunit is used for comparing the available transmission space of the connecting line with real-time waste wind power by adopting the power transaction scheduling platform, taking the minimum value of the available transmission space and the real-time waste wind power as a waste wind power transaction result, and issuing the waste wind power transaction result to electric heating users participating in waste wind power transaction in real time.
Further, the revision unit includes:
the processing subunit is used for entering the next step if the wind discarding power transaction occurs in a fifth period from the electricity limiting time, and ending the wind discarding power transaction if the wind discarding power transaction does not occur;
the updating subunit is used for superposing the wind power rejection transaction value on the basis of the expected value of the transmission power of the original tie line when the distance is the fifth time interval from the electricity limiting moment, and acquiring a new expected value of the power of the tie line across provinces and regions;
the recording subunit is used for recording relevant information of the wind power abandon transaction in real time at the electricity limiting time, including recording actual wind power output, transaction time, wind power theoretical output and actual power consumption of an electric heating user;
the judging subunit is used for confirming that the transaction electric quantity is equal to the actual electric quantity of the electric heating user if the actual electric power does not exceed the electric power subscription result of the abandoned electric power; and if the actual power is larger than the purchased wind-discarding purchasing result, exceeding the purchased wind-discarding power part, and settling according to the normal market price.
Compared with the closest prior art, the invention has the following remarkable improvements:
considering the limitation of grid regulation when the wind power fluctuation range is exceeded due to the randomness, the fluctuation and the intermittence of wind power; the invention provides a real-time scheduling method and a real-time scheduling system for a cross-regional wind power generation transaction, which provide references for the marketizing design of the cross-regional wind power generation transaction, fully utilize the wind power generation output of a wind power investment early warning area, execute the cross-regional grade of the wind power generation and clean heating of the cross-regional transaction under the same regional grade, and acquire wind power prediction results;
calculating and issuing wind abandon information according to 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. On one hand, the wind power utilization rate is improved, on the other hand, energy conservation and emission reduction can be realized, new energy consumption is solved by discarding a heating mode of wind power crossing region level crossing regions, and the method is an effective measure for promoting green low-carbon development.
Drawings
FIG. 1 is a general flow chart provided in an embodiment of the present invention;
FIG. 2 is a flow chart of real-time scheduling of wind curtailment transactions provided in an embodiment of the present invention;
fig. 3 is a schematic diagram of a real-time scheduling process time window of wind-discarding heating provided in an embodiment of the invention.
Detailed Description
For a better understanding of the present invention, reference is made to the following description, drawings and examples.
The invention provides a real-time scheduling method and a real-time scheduling system for wind power rejection transaction. By implementing the scheme of the invention, the transaction of the abandoned wind power in different regional levels and different regions can be realized, so that the transaction range of the abandoned wind power is enlarged, and the income capacity of wind power stations, electric heating and heat storage type electric heating users is improved.
As shown in fig. 1 and fig. 2, the real-time scheduling method for the wind power rejection transaction specifically includes the following steps, and a time window schematic diagram of each step is shown in fig. 3, including:
s1, collecting wind power prediction results;
s2, calculating and issuing wind abandon information according to the wind power prediction result and the wind power acceptance capacity;
s3, carrying out electric power subscription by the electric power transaction scheduling platform according to the released wind curtailment information;
and S4, determining a power dispatching plan according to the power subscription information.
In step S2, calculating and issuing wind abandon information according to the wind power prediction result and the wind power acceptance capability, including:
a. determining wind abandoning information according to wind power prediction results and the magnitude of wind power admittance capacity when the distance is within a first period of the electricity limiting time;
b. when the distance from the electricity limiting moment to the second period is the same, detecting whether the abandoned wind information accords with a new energy priority scheduling principle by adopting a priority scheduling evaluation system; if not, prompting to modify the abandoned wind information, and returning to the step a;
c. reading actual wind power output in a third period of the distance electricity limiting time, and if the wind power plant is in the electricity limiting state at the moment, reading wind power theoretical power;
d. and taking the difference between the actual wind power output/wind power theoretical power and the waste wind power as real-time waste wind power, taking the integral of the real-time waste wind power as real-time waste wind power, and issuing the real-time waste wind power to the power transaction scheduling platform within a preset time range. Wherein, the first time period is greater than the second time period is greater than the third time period, and the first, second and third time periods can be respectively set to 15min, 13min and 5min; further, the predetermined time range is generally set to 1min.
In step a, determining wind abandoning information according to wind power prediction results and the magnitude of wind power receiving capacity, wherein the method comprises the following steps: and comparing the wind power predicted value with the wind power receiving capacity, setting the exceeding part as initial wind discarding power when the wind power predicted value is larger than the wind power receiving capacity, taking the integral of the initial wind discarding power as initial wind discarding power, and forming wind discarding information by the initial wind discarding power and the wind discarding power.
In step S3, the power transaction scheduling platform performs power subscription according to the issued wind curtailed information, including:
when the distance is the fourth period of the electricity limiting time, the electric heating user reads the abandoned wind information and sends out the subscription intention to supply electricity within 1min
A force transaction scheduling platform;
when the distance is the fifth period from the electricity limiting time, if the purchased electricity is smaller than the real-time wind discarding electricity, the electricity transaction scheduling platform issues the purchase confirmation information to the electric heating user, and distributes the real-time wind discarding electricity which is not purchased to the wind power plant AGC control platform; and if the purchased power exceeds the real-time waste wind power, issuing the purchased confirmation information to the electric heating user. Wherein the fourth period > the fifth period, the fourth and fifth periods may be set to 4min and 3min, respectively;
in step S4, determining the power scheduling plan according to the electric power subscription information includes:
4-1, determining a waste wind power transaction result according to the waste wind information and a tie line available power transmission space for waste wind power transaction;
4-2, revising a tie line planning curve according to the abandoned wind power trade result.
In step 4-1, determining a power discarding power trading result includes:
after acquisition of subscription confirmation information, when the distance is 4min from the electricity limiting time, namely, when the distance is a fourth period from the electricity limiting time, a power transaction scheduling platform is adopted to read the expected value of the transmission power of the power limiting time tie line, and the available transmission space of the tie line for power discarding power transaction is calculated;
and comparing the available transmission space of the connecting line with real-time waste wind power by adopting a power transaction scheduling platform, taking the minimum value of the available transmission space and the real-time waste wind power as a waste wind power transaction result, and issuing the waste wind power transaction result to electric heating users participating in waste wind power transaction in real time. The electric heating user mentioned here mainly refers to a heat storage type electric heating user.
The available transmission space for the tie line is determined by:
P e ＝min{P l_max -P a ,P r } (1)
wherein P is e Power transmission space available for tie lines for real-time wind curtailment power trade, P a Power expectancy value, P of power limit moment connecting line transmission power l_max -P a Indicating surplus power transmission capacity of connecting line, P r Parameters are adjusted for the tie-line.
Determining a power-discarding trading result by the following formula:
P t ＝min{P c ,P e } (2)。
in step 4-2, revising the tie-line planning curve according to the abandoned wind power trade result comprises:
1) When the distance limit time is 3min, namely, when the distance limit time is in a fifth period; if the wind discarding power transaction occurs, entering the next step, otherwise ending the wind discarding power transaction;
2) When the distance limit time is 3min, superposing the wind power rejection trading value on the basis of the original tie line transmission power expected value to obtain a new cross-provincial and cross-regional tie line power expected value;
3) Recording relevant information of wind power abandon transaction in real time at the electricity limiting moment, wherein the relevant information comprises actual wind power output, transaction time, theoretical wind power output and actual power consumption of an electric heating user; if the actual power consumption does not exceed the electric power purchasing result of the abandoned electric power, confirming that the transaction electric quantity is equal to the actual electric quantity of the electric heating user; and if the actual power is larger than the purchased wind-discarding purchasing result, exceeding the purchased wind-discarding power part, and settling according to the normal market price.
Based on the same technical conception, the application also provides a real-time scheduling system for wind power abandoning transaction, which comprises the following steps:
the collection module is used for collecting wind power prediction results;
the calculation module is used for calculating and issuing abandoned wind information according to the wind power prediction result and the wind power acceptance capacity by the power transaction scheduling platform;
the subscription module is used for carrying out electric power subscription according to the released abandoned wind information;
and the determining module is used for determining the power dispatching plan according to the power subscription information.
Wherein, the calculation module includes:
the acquisition unit is used for determining the wind abandoning information according to the wind power prediction result and the wind power acceptance capacity when the distance is within a first period of the electricity limiting time;
the evaluation unit is used for detecting whether the abandoned wind information accords with a new energy priority scheduling principle or not by adopting a priority scheduling evaluation system when the distance is a second period from the electricity limiting time; if not, prompting to modify the abandoned wind information, and returning to the step a;
the reading unit is used for reading the actual wind power output when the distance is within a third period of the electricity limiting time, and if the wind power plant is in the electricity limiting state at the moment, the wind power theoretical power is read;
the definition unit is used for taking the difference between the actual wind power output/wind power theoretical power and the waste wind power as real-time waste wind power, taking the integral of the real-time waste wind power as real-time waste wind power, and issuing the real-time waste wind power to the power transaction scheduling platform within a preset time range.
The subscription module comprises:
a transmission unit for reading the abandoned wind information by the electric heating user when the distance from the electricity limiting time is a fourth period, and determining that the electric heating user is at a preset time
Sending a subscription intention to a power transaction scheduling platform within a time range;
the scheduling unit is used for issuing subscription confirmation information to an electric heating user and distributing the real-time wind discarding power which is not subscribed to the wind power plant AGC control platform if the subscribed power is smaller than the real-time wind discarding power when the distance from the time limit moment to the fifth period; and if the purchased power exceeds the real-time waste wind power, issuing the purchased confirmation information to the electric heating user.
The determining module comprises:
the transaction unit is used for determining a waste wind power transaction result according to the waste wind information and the available power transmission space of the tie line for waste wind power transaction;
a transaction unit, further comprising: the calculation subunit is used for reading the expected value of the power transmission power of the tie line at the electricity limiting time by adopting the power transaction scheduling platform in a fourth period of the distance electricity limiting time after acquiring the subscription confirmation information, and calculating the available power transmission space of the tie line for the power discarding transaction; and the comparison subunit is used for comparing the available transmission space of the connecting line with real-time waste wind power by adopting the power transaction scheduling platform, taking the minimum value of the available transmission space and the real-time waste wind power as a waste wind power transaction result, and issuing the waste wind power transaction result to electric heating users participating in waste wind power transaction in real time.
And the revising unit is used for revising the tie-line planning curve according to the abandoned wind power trade result.
A revision unit, further comprising: the processing subunit is used for entering the next step if the wind discarding power transaction occurs in a fifth period from the electricity limiting time, and ending the wind discarding power transaction if the wind discarding power transaction does not occur; the updating subunit is used for superposing the wind power rejection transaction value on the basis of the expected value of the transmission power of the original tie line when the distance is the fifth time interval from the electricity limiting moment, and acquiring a new expected value of the power of the tie line across provinces and regions; the recording subunit is used for recording relevant information of the wind power abandon transaction in real time at the electricity limiting time, including recording actual wind power output, transaction time, wind power theoretical output and actual power consumption of an electric heating user; the judging subunit is used for confirming that the transaction electric quantity is equal to the actual electric quantity of the electric heating user if the actual electric power does not exceed the electric power subscription result of the abandoned electric power; and if the actual power is larger than the purchased wind-discarding purchasing result, exceeding the purchased wind-discarding power part, and settling according to the normal market price.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining 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, and the like) 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 flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows 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 apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical aspects of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those of ordinary skill in the art that: modifications and equivalents may be made to the specific embodiments of the invention without departing from the spirit and scope of the invention, which is intended to be covered by the claims.
Claims (11)
1. A real-time scheduling method for wind curtailment power trading, the method comprising:
collecting wind power prediction results;
calculating and issuing wind abandon information according to the wind power prediction result and the wind power acceptance capacity;
the power transaction scheduling platform performs power subscription according to the released wind abandoning information;
determining a power scheduling plan according to the power subscription information;
the determining a power scheduling plan according to the power subscription information includes:
determining a wind discarding power transaction result according to the wind discarding information and a power transmission space available for a tie line used for wind discarding power transaction;
revising a tie line planning curve according to the abandoned wind power trade result;
the revising the tie-line planning curve according to the abandoned wind power trade result comprises the following steps:
1) When the distance is within a fifth period of the electricity limiting time, if the electricity discarding transaction occurs, the next step is carried out, otherwise, the electricity discarding transaction is ended;
2) When the distance is within a fifth period of the electricity limiting time, superposing a wind power rejection trading value on the basis of the expected value of the transmission power of the original tie line, and obtaining a new expected value of the power of the tie line across provinces and regions;
3) At the electricity limiting time, recording relevant information of the wind power abandon transaction in real time, wherein the relevant information comprises actual wind power output, transaction time, theoretical wind power output and actual power consumption of an electric heating user; if the actual power consumption does not exceed the electric power purchasing result of the abandoned electric power, confirming that the transaction electric quantity is equal to the actual electric quantity of the electric heating user; and if the actual power is larger than the purchased wind-discarding purchasing result, exceeding the purchased wind-discarding power part, and settling according to the normal market price.
2. The method of claim 1, wherein the calculating and distributing the wind curtailment information based on the wind power prediction result and the wind power acceptance capability comprises:
a. determining wind abandoning information according to wind power prediction results and the magnitude of wind power admittance capacity when the distance is within a first period of the electricity limiting time;
b. when the distance from the electricity limiting moment to the second period is the same, detecting whether the abandoned wind information accords with a new energy priority scheduling principle by adopting a priority scheduling evaluation system; if not, prompting to modify the abandoned wind information, and returning to the step a;
c. reading actual wind power output in a third period of the distance electricity limiting time, and if the wind power plant is in the electricity limiting state at the moment, reading wind power theoretical power;
d. taking the difference between the actual wind power output/wind power theoretical power and the waste wind power as real-time waste wind power, taking the integral of the real-time waste wind power as real-time waste wind power, and publishing the real-time waste wind power to a power transaction scheduling platform within a preset time range; wherein the first period > the second period > the third period.
3. The method of claim 2, wherein determining the wind curtailment information based on the wind power prediction result and the magnitude of the wind power acceptance capability comprises: and comparing the wind power predicted value with the wind power admittance capacity, setting the excess part as initial wind-discarding power when the wind power predicted value is larger than the wind power admittance capacity, taking the integral of the initial wind-discarding power as initial wind-discarding power, and forming wind-discarding information by the initial wind-discarding power and the wind-discarding power.
4. The method of claim 1, wherein the power trading scheduling platform performs power subscription according to the published wind curtailment information, comprising:
when the distance is a fourth period from the electricity limiting time, the electric heating user reads the waste wind information and sends a subscription intention to the electric power transaction scheduling platform within a preset time range;
when the distance is the fifth period of the electricity limiting time, if the subscribed electric power is smaller than the real-time wind discarding electric power, the electric power transaction scheduling platform issues subscription confirmation information to an electric heating user, and distributes the real-time wind discarding electric power which is not subscribed to the wind power plant AGC control platform; if the purchased power exceeds the real-time abandoned wind power, issuing the purchased confirmation information to an electric heating user; wherein the fourth period > the fifth period.
5. The method of claim 1, wherein the determining the discard power transaction result comprises:
after acquisition of subscription confirmation information, reading a power transmission expected value of the tie line at the electricity limiting moment by adopting a power transaction scheduling platform in a fourth period of time from the electricity limiting moment, and calculating an available power transmission space of the tie line for power discarding transaction;
and comparing the available transmission space of the connecting line with real-time waste wind power by adopting a power transaction scheduling platform, taking the minimum value of the available transmission space and the real-time waste wind power as a waste wind power transaction result, and issuing the waste wind power transaction result to electric heating users participating in waste wind power transaction in real time.
6. The method of claim 1, wherein the tie-line available transmission space is determined by:
P e ＝min{P l_max -P a ,P r } (1)
wherein P is e Power transmission space available for tie lines for real-time wind curtailment power trade, P a Power expectancy value, P of power limit moment connecting line transmission power l_max -P a Indicating surplus power transmission capacity of connecting line, P r Parameters are adjusted for the tie-line.
7. The method of claim 5, wherein the discard power trade result is determined by:
P t ＝min{P c ,P e } (2)。
8. a real-time scheduling system for wind curtailment transactions, comprising:
the collection module is used for collecting wind power prediction results;
the calculation module is used for calculating and issuing abandoned wind information according to the wind power prediction result and the wind power acceptance capacity by the power transaction scheduling platform;
the subscription module is used for carrying out electric power subscription according to the released abandoned wind information;
the determining module is used for determining a power dispatching plan according to the power subscription information;
the determining module includes:
the transaction unit is used for determining a waste wind power transaction result according to the waste wind information and the available power transmission space of the tie line for waste wind power transaction;
the revising unit is used for revising the tie-line planning curve according to the abandoned wind power transaction result;
the revision unit includes:
the processing subunit is used for entering the next step if the wind discarding power transaction occurs in a fifth period from the electricity limiting time, and ending the wind discarding power transaction if the wind discarding power transaction does not occur;
the updating subunit is used for superposing the wind power rejection transaction value on the basis of the expected value of the transmission power of the original tie line when the distance is the fifth time interval from the electricity limiting moment, and acquiring a new expected value of the power of the tie line across provinces and regions;
the recording subunit is used for recording relevant information of the wind power abandon transaction in real time at the electricity limiting time, including recording actual wind power output, transaction time, wind power theoretical output and actual power consumption of an electric heating user;
the judging subunit is used for confirming that the transaction electric quantity is equal to the actual electric quantity of the electric heating user if the actual electric power does not exceed the electric power subscription result of the abandoned electric power; and if the actual power is larger than the purchased wind-discarding purchasing result, exceeding the purchased wind-discarding power part, and settling according to the normal market price.
9. The system of claim 8, wherein the computing module comprises:
the acquisition unit is used for determining the wind abandoning information according to the wind power prediction result and the wind power acceptance capacity when the distance is within a first period of the electricity limiting time;
the evaluation unit is used for detecting whether the abandoned wind information accords with a new energy priority scheduling principle or not by adopting a priority scheduling evaluation system when the distance is a second period from the electricity limiting time; if not, prompting to modify the abandoned wind information, and returning to the step a;
the reading unit is used for reading the actual wind power output when the distance is within a third period of the electricity limiting time, and if the wind power plant is in the electricity limiting state at the moment, the wind power theoretical power is read;
the definition unit is used for taking the difference between the actual wind power output/wind power theoretical power and the waste wind power as real-time waste wind power, taking the integral of the real-time waste wind power as real-time waste wind power, and issuing the real-time waste wind power to the power transaction scheduling platform within a preset time range.
10. The system of claim 8, wherein the subscription module comprises:
the transmission unit is used for reading the abandoned wind information by the electric heating user when the distance is the fourth period from the electricity limiting time, and sending the subscription intention to the electric power transaction scheduling platform within the preset time range;
the scheduling unit is used for issuing subscription confirmation information to an electric heating user and distributing the real-time wind discarding power which is not subscribed to the wind power plant AGC control platform if the subscribed power is smaller than the real-time wind discarding power when the distance from the time limit moment to the fifth period; and if the purchased power exceeds the real-time waste wind power, issuing the purchased confirmation information to the electric heating user.
11. The system of claim 8, wherein the transaction unit comprises:
the calculation subunit is used for reading the expected value of the power transmission power of the tie line at the electricity limiting time by adopting the power transaction scheduling platform in a fourth period of the distance electricity limiting time after acquiring the subscription confirmation information, and calculating the available power transmission space of the tie line for the power discarding transaction;
and the comparison subunit is used for comparing the available transmission space of the connecting line with real-time waste wind power by adopting the power transaction scheduling platform, taking the minimum value of the available transmission space and the real-time waste wind power as a waste wind power transaction result, and issuing the waste wind power transaction result to electric heating users participating in waste wind power transaction in real time.
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| CN106026081A (en) * | 2016-06-22 | 2016-10-12 | 中国电力科学研究院 | Real-time dispatching method for heating through abandoned wind power |
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| CN106026081A (en) * | 2016-06-22 | 2016-10-12 | 中国电力科学研究院 | Real-time dispatching method for heating through abandoned wind power |
| CN106651629A (en) * | 2016-09-21 | 2017-05-10 | 浙江大学 | Power distribution method for consuming abandoned wind power through stored heat |
| CN106886835A (en) * | 2017-02-15 | 2017-06-23 | 国电南瑞科技股份有限公司 | The off line province's two-stage real-time deal prediction coordination optimizing method of broad sense contact ray mode |
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