CN109217380B - Wind-abandoning and electricity-limiting method and device - Google Patents
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Abstract
The invention provides a wind-abandoning and electricity-limiting method and device, and relates to the field of electricity limitation. According to the wind abandoning and electricity limiting method provided by the invention, when wind abandoning and electricity limiting are carried out, corresponding electricity limiting proportions are set for different wind power plants, the target output and the electricity limiting capacity of each wind power plant are better controlled, and finally, when the reference total electricity limiting capacity is larger than the target total electricity limiting capacity, electricity is limited according to the target output of each wind power plant, so that the accuracy of an electricity limiting scheme is ensured.
Description
Technical Field
The invention relates to the field of power limiting, in particular to a wind-abandoning and power-limiting method and device.
Background
Under the large background of national energy conservation and emission reduction and energy revolution, renewable energy represented by wind power rises rapidly, and wind power projects develop rapidly in a plurality of provinces in China. However, due to the reasons that the power grid admission capacity of the new energy station is insufficient, the construction period of the station is not matched, the wind power is not stably influenced by weather, and the like, in order to ensure the safety of the power grid, wind and electricity are reasonably abandoned under necessary conditions.
At present, aiming at wind and fire abandonment and electricity limitation, the mainstream solution proposed by the state is wind and fire replacement transaction, namely when a power grid is forced to abandon wind and limit electricity due to peak shaving or grid structure constraint and the like, the power generation of a thermal power plant participating in transaction is further reduced on the basis of the minimum mode, a way is made for wind power, and the thermal power plant is replaced by the wind power plant to generate electricity. The technical problem of direct wind power integration is converted into the financial problem between wind power and thermal power by the solution, and the wind power plant purchases the power generation right from the thermal power plant. In order to solve the problem of wind abandoning and electricity limiting, the related work of wind power integration and consumption needs to be further strengthened.
The solution has positive effect on normal operation of wind power. However, under the current situation that wind and electricity must be abandoned, a reasonable electricity-limiting strategy is needed to solve the current wind and electricity abandoning and limiting phenomenon in a large range from the economical and safety aspects.
The current common electricity limiting methods mainly include two types: a dispatcher manual control mode and a power-limiting software automatic control mode.
The manual control mode of the dispatcher refers to a mode that when the power grid has limited power demand, the power grid dispatcher directly informs the wind power plant through a telephone or sets a fixed target value for the wind power plant through system software. The method is manually realized by a dispatcher, and the control requirement after the modern power grid new energy is accessed in a large scale is difficult to meet;
the automatic control mode of the electricity limiting software is that special new energy control software is adopted to monitor important data of the power grid in real time, when the power grid has electricity limiting requirements, target values of all participating electricity limiting wind power plants are automatically calculated, and control commands are issued to the automatic control system at the wind power plant side through the main station-substation link. The method needs to preset a new energy power distribution strategy and timely adjust the control targets of each wind power plant according to the real-time condition of a power grid.
Disclosure of Invention
The invention aims to provide a wind-abandoning and electricity-limiting method and a wind-abandoning and electricity-limiting device.
In a first aspect, an embodiment of the present invention provides a wind curtailment method, including:
respectively calculating a second synchronous rate of each wind power plant according to a preset first synchronous rate and a relative power limiting ratio of the wind power plants;
respectively calculating the power limit capacity of each wind power plant according to the second synchronous rate of each wind power plant and the installed capacity of each wind power plant;
calculating the target output of each wind power plant according to the limited capacity of each wind power plant and the installed capacity of each wind power plant;
judging whether the reference total power limit capacity is larger than the target total power limit capacity; the reference total power limiting capacity is calculated according to the power limiting capacities of the wind power plants;
and if the reference total power limiting capacity is larger than the target total power limiting capacity, limiting the power according to the target output of each wind power plant.
With reference to the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, where the method further includes:
and calculating a preset first coincidence rate according to the total real-time output of the wind power plant, the total required electricity limiting amount and the total rated machine capacity of the wind power plant.
With reference to the first aspect, an embodiment of the present invention provides a second possible implementation manner of the first aspect, where calculating the second coincidence rate of each wind power plant according to a preset first coincidence rate and a relative power limit ratio of the wind power plants respectively includes:
respectively calculating the power limit deviation ratio of each wind power plant according to the ranking of each wind power plant in the abandoned wind sequence and the relative power limit ratio of the wind power plants; the relative electricity limiting proportion of the wind power plant is used for representing electricity limiting deviation ratios corresponding to different ranks in the abandoned wind sequence;
and respectively calculating a second coincidence rate of each wind power plant according to the power limit deviation ratio of each wind power plant and a preset first coincidence rate.
With reference to the first aspect, an embodiment of the present invention provides a third possible implementation manner of the first aspect, where after calculating a target output of each wind power plant according to the power limit capacity of each wind power plant and the installed capacity of each wind power plant, the method further includes:
judging whether the target output of the target wind power plant is greater than the real-time output of the target wind power plant;
and if the target output of the target wind power plant is not greater than the real-time output of the target wind power plant, executing the step to judge whether the reference total power limiting capacity is greater than the target total power limiting capacity.
With reference to the first aspect, an embodiment of the present invention provides a fourth possible implementation manner of the first aspect, where the method further includes:
and if the target output of the target wind power plant is larger than the real-time output of the target wind power plant, recalculating the target output of the target wind power plant according to the real-time output of the target wind power plant and a preset first reduction coefficient.
With reference to the first aspect, an embodiment of the present invention provides a fifth possible implementation manner of the first aspect, where the method further includes:
and if the reference total power limiting capacity is smaller than the target total power limiting capacity, adjusting the preset first concurrence rate by using a second reduction coefficient, and respectively calculating a second concurrence rate of each wind power plant according to the preset first concurrence rate and the relative power limiting proportion of the wind power plants.
With reference to the first aspect, an embodiment of the present invention provides a sixth possible implementation manner of the first aspect, where the rank of the wind farm in the wind curtailment ranking is calculated according to the following parameters: yesterday planning power, yesterday actual completion power, this month planning power, this month actual completion power, this month power limiting power, this month excess power generation and predetermined punishment parameters.
With reference to the first aspect, an embodiment of the present invention provides a seventh possible implementation manner of the first aspect, where the limiting power according to the target output of each wind power plant includes:
and respectively sending the target output of the wind power plants to each power plant so that each wind power plant works according to the corresponding target treatment.
In a second aspect, an embodiment of the present invention further provides a wind-abandoning and electricity-limiting device, including:
the first calculation module is used for respectively calculating a second synchronous rate of each wind power plant according to a preset first synchronous rate and the relative power limiting proportion of the wind power plants;
the second calculation module is used for calculating the power limiting capacity of each wind power plant according to the second synchronous rate of each wind power plant and the installed capacity of each wind power plant;
the third calculation module is used for calculating the target output of each wind power plant according to the limited capacity of each wind power plant and the installed capacity of each wind power plant;
the first judgment module is used for judging whether the reference total power limit capacity is larger than the target total power limit capacity or not; the reference total power limiting capacity is calculated according to the power limiting capacities of the wind power plants;
and the control module is used for limiting the power according to the target output of each wind power plant if the reference total power limiting capacity is larger than the target total power limiting capacity.
With reference to the second aspect, an embodiment of the present invention provides a first possible implementation manner of the second aspect, where the method further includes:
and the fourth calculating module is used for calculating a preset first coincidence rate according to the total real-time output of the wind power plant, the total required electricity limiting amount and the total rated machine capacity of the wind power plant.
When the wind abandoning and electricity limiting method provided by the embodiment of the invention is realized, the second coincidence rate of each wind power plant is respectively calculated according to the preset first coincidence rate and the relative electricity limiting proportion of the wind power plants; then, respectively calculating the power limit capacity of each wind power plant according to the second synchronous rate of each wind power plant and the installed capacity of each wind power plant; then, calculating the target output of each wind power plant according to the power limiting capacity of each wind power plant and the installed capacity of each wind power plant; judging whether the reference total power limit capacity is larger than the target total power limit capacity or not; the reference total power limiting capacity is calculated according to the power limiting capacities of the wind power plants; and finally, if the reference total power limiting capacity is larger than the target total power limiting capacity, limiting the power according to the target output of each wind power plant. That is, according to the scheme provided by the application, when wind power limiting is abandoned, corresponding power limiting proportions are set for different wind power plants, the target output and the power limiting capacity of each wind power plant are better controlled, and finally, when the reference total power limiting capacity is larger than the target total power limiting capacity, power is limited according to the target output of each wind power plant, so that the accuracy of the power limiting scheme is ensured.
In order to make the objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
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In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 shows a basic flow chart of a wind curtailment and electricity limiting method provided by an embodiment of the invention;
FIG. 2 shows a first optimization flowchart of a wind curtailment and electricity limiting method provided by an embodiment of the invention;
fig. 3 shows a first optimization flowchart of a wind curtailment and electricity limiting method provided by the embodiment of the invention;
fig. 4 shows a basic block diagram of wind curtailment provided by an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
In the related art, when wind abandoning and electricity limiting are carried out, two methods are generally adopted, the first method is to limit electricity by adopting a manual intervention mode, namely when electricity limiting is needed, a worker informs an appointed wind power plant to limit electricity by a telephone according to a set electricity limiting strategy; the second method is software automatic control, namely after the software collects the relevant data of the power grid, the data are automatically analyzed, then, a power limiting strategy is generated, and each wind power plant is controlled according to the power limiting strategy.
In any of the above manners, the core of the method is to determine a power limiting strategy, that is, what kind of working manner each wind power plant should adopt to work, but the inventor of the present application finds that the manner of determining the power limiting strategy is not reasonable enough at present.
Furthermore, as shown in fig. 1, the present application provides a wind curtailment method, including:
s101, respectively calculating a second coincidence rate of each wind power plant according to a preset first coincidence rate and a relative power limiting ratio of the wind power plants;
s102, respectively calculating the power limit capacity of each wind power plant according to the second synchronous rate of each wind power plant and the installed capacity of each wind power plant;
s103, calculating target output of each wind power plant according to the power limiting capacity of each wind power plant and the installed capacity of each wind power plant;
s104, judging whether the reference total limited capacity is larger than the target total limited capacity; the reference total power limiting capacity is calculated according to the power limiting capacities of the wind power plants;
and S105, if the reference total power limiting capacity is larger than the target total power limiting capacity, limiting power according to the target output of each wind power plant.
In step S101, the coincidence rate means: in an electric power system, the sum of the maximum values of the loads is always larger than the maximum value of the sum, because a coefficient reflecting an inequality relationship that each customer is unlikely to reach the maximum value of the used amount at the same time at one moment is called a coincidence rate, also called a simultaneous load rate. The first synchronization rate is a preset reference value, and the user can adjust the first synchronization rate according to specific conditions in specific implementation.
The relative power limiting ratio of the wind power plant means that power limiting strategies of different wind power plants are different, and power limiting capacities and target output of different wind power plants are different. The relative power limit ratio should reflect the difference to some extent, and the relative power limit ratio should be a parameter reflecting the relative value of the power limit capacity between different power plants or the relative value of the target treatment between different power plants. Generally, the relative electricity limiting ratio of the wind power plant is related to historical operating conditions of the wind power plant, for example, the planned generated power and the actually completed generated power in the last month, and the execution deviation condition of the wind power plant to the electricity limiting target output in the previous day can jointly determine the relative electricity limiting ratio, and here, the relative electricity limiting ratio can also be understood as the electricity limiting deviation ratio.
In step S101, the second coincidence ratio is obtained by increasing or decreasing a predetermined current limit deviation ratio, which is a result reflected by the relative current limit ratio, on the basis of the first coincidence ratio.
In step S102, the power limit capacity of the wind power plant is generally determined according to a difference between the installed capacity of the wind power plant and the target output of the wind power plant. In some cases, the numerical value of the power limit capacity of the wind power plant may be installed capacity-target output.
In step S103, the target output of the wind power plant is generally determined according to the installed capacity of the wind power plant and the second concurrency rate of the wind power plant. In some cases, the target output of the wind power plant may be a second concurrence rate installed capacity of the wind power plant.
In step S104, it is determined whether the reference total power limit capacity is greater than the target total power limit capacity, and it is mainly determined whether the final power limit purpose can be achieved by using the power limit method, and if the final power limit purpose can be achieved, that is, whether the reference total power limit capacity is greater than the target total power limit capacity (the target total power limit capacity is a predetermined target value, and the target total power limit capacity is equal to the total amount of active power required to be reduced to restore the regional power grid frequency to 50 Hz), each wind power plant may be operated according to the target output of each wind power plant calculated in step S103, so as to complete wind curtailment. The calculated target output is the strategy of wind curtailment and electricity limitation.
Step S105 may send the target output of the wind power plant to each power plant, respectively, so that each wind power plant operates according to the corresponding target process.
More specifically, during implementation, the target output of the wind power plant may be safely checked and then sent to each wind power plant for execution as an AGC instruction through a power scheduling data network. The safety check of the target output of each wind power electric field comprises the following steps: the method comprises the following steps of control command dead zone verification, maximum adjustment increment verification and unit adjustment limit verification. Only if the three checks are passed, the target output can be sent to each wind power plant.
In a specific implementation, the first synchronization rate may be an empirical value (in this case, each time step S101 is executed, the value of the first synchronization rate is constant), or may be calculated according to some parameters (in this case, each time step S101 is executed, the value of the first synchronization rate may be changed).
Specifically, for the case that the first synchronization rate is calculated according to some parameters, the method provided by the present application adopts the following manner, that is, as shown in fig. 3, the method further includes, before step S101, the following steps:
s301, calculating a preset first coincidence rate according to the total real-time output of the wind power plant, the total required electricity limiting amount and the total rated machine capacity of the wind power plant.
Specifically, the first synchronization rate may be calculated according to the following formula:
wherein f isxIs a first timing rate, PFruit of Chinese wolfberryThe total real-time output (active power) of the wind power plant is transmitted to a power dispatching data network P in real time by the plantxFor the total amount of power limitation required, i.e. the total amount of active power required to restore the frequency to 50Hz, obtained by conversion of the frequency characteristic coefficient of the regional power grid, PForehead (forehead)The total rated capacity. Wherein the total rated machine capacity is the sum of the rated installed capacities of the individual wind power plants.
In order to improve the accuracy of calculation, abandoned wind sequencing can be introduced, wherein the abandoned wind sequencing is determined according to the generated energy completion condition of each wind power plant, the better the generated energy completion condition is, the more the ranking is, and otherwise, the more the ranking is. More specifically, the wind power plant with higher electric quantity completion rate should be at the front position in the abandoned wind sequence; according to the conditions of power limiting capacity and over-power generation capacity, the wind power plant with poor instruction response during power limiting should be at the position near the front in the abandoned wind sequence; according to various factors such as station environmental protection, wind storage combination, electricity price and the like, the wind power plant with poor economy is arranged at a position near the front in the abandoned wind sequencing.
The lower the electricity limit deviation ratio of the wind power plant ranked more forward is, the higher the electricity limit deviation ratio ranked more backward is. Generally, the wind power plant electricity limiting deviation ratio ranked at the top is 0, and the wind power plant electricity limiting deviation ratio ranked at the last is 20%. Preferably, in the abandoned wind sorting, the power limit deviation ratios of the wind power plants can form an arithmetic progression according to the sequence from the first ranking to the last ranking. In other words, in the abandoned wind sorting, the difference values of the power limiting deviation ratios of any two adjacent ranked wind power plants are equal.
Specifically, the ranking of the wind power plants in the abandoned wind ranking is calculated according to the following parameters: yesterday planning power, yesterday actual completion power, this month planning power, this month actual completion power, this month power limiting power, this month excess power generation and predetermined punishment parameters. The punishment parameter can be determined according to whether the wind power plant completes the basic workload or not and whether the wind power plant has illegal operation or not.
During specific implementation, the electric quantity completion condition of each wind power plant in the previous day can be counted after 0 point every day, and a new round of abandoned wind sequencing is obtained.
Further, when the step of determining the power limit deviation ratio is performed, the following formula can be implemented:
in the formula, Kn is a power limiting deviation ratio, N is the rank of a designated wind power plant in the abandoned wind sequence, and N is the total number of the wind power plants. K is a coefficient (usually adjustable), and taking K as 0.2 as an example, by using the above formula, it can be obtained that the wind power plant power limit deviation ratio ranked at the top is 0, and the wind power plant power limit deviation ratio ranked at the last is 20%.
That is, the relative electricity limiting ratio of the wind power plant should represent the electricity limiting deviation ratio corresponding to different ranks in the abandoned wind ranking.
After the power limit deviation ratio of each wind power plant is determined, a second synchronization rate of each wind power plant can be respectively calculated according to the power limit deviation ratio of each wind power plant and a preset first synchronization rate, and specifically for a designated wind power plant, the second synchronization rate can be equal to the sum of the first synchronization rate and the power limit deviation ratio.
That is, as shown in fig. 2, step S101, respectively calculating a second coincidence rate of each wind power plant according to a preset first coincidence rate and a relative power limit ratio of the wind power plants, includes:
s1011, respectively calculating the power limit deviation ratio of each wind power plant according to the ranking of each wind power plant in the abandoned wind sequence and the relative power limit proportion of each wind power plant; the relative electricity limiting proportion of the wind power plant is used for representing electricity limiting deviation ratios corresponding to different ranks in the abandoned wind sequence;
and S1012, respectively calculating a second coincidence rate of each wind power plant according to the limited power deviation ratio of each wind power plant and a preset first coincidence rate.
Under some conditions, after the target output is calculated, the target processing cannot be directly used for subsequent calculation, and the conditions that part of wind power plants are limited in power (output reducing instruction) and part of wind power plants are not limited in power (output increasing instruction) are mainly avoided in order to ensure the fairness of power limitation.
Furthermore, in the scheme provided by the application, after the target output is obtained through calculation, it is also required to judge whether the target output (the processing after wind abandoning and electricity limiting) of the wind power plant is greater than the real-time output of the target wind power plant, and then determine how to process the target output.
Specifically, the method provided by the present application, after calculating the target output of each wind power plant according to the power limit capacity of each wind power plant and the installed capacity of each wind power plant, further includes:
judging whether the target output of the target wind power plant is greater than the real-time output of the target wind power plant;
and if the target output of the target wind power plant is not greater than the real-time output of the target wind power plant, executing the step to judge whether the reference total power limiting capacity is greater than the target total power limiting capacity.
And if the target output of the target wind power plant is larger than the real-time output of the target wind power plant, recalculating the target output of the target wind power plant according to the real-time output of the target wind power plant and a preset first reduction coefficient.
Through the judgment process, all wind power plants participate in power grid power limiting, the fairness of power limiting is guaranteed, and the fact that the output of the wind power plant with small real-time output greatly rises after sufficient wind power is guaranteed, so that the frequency of the power grid is out of limit again.
The first reduction coefficient is usually a preset constant, and the step of recalculating the target output of the target wind power plant according to the real-time output of the target wind power plant and the preset first reduction coefficient means that the real-time output of the target wind power plant needs to be reduced before the subsequent step S105 is executed. For example, the real-time output of the target wind power plant may be reduced according to a certain reduction ratio as the target output of the target wind power plant.
Specifically, for example, the newly calculated target output of the target wind power plant may be equal to the real-time output of the target wind power plant multiplied by 0.9. Namely, the 0.9 is the first reduction coefficient of the real-time output of the target wind power plant.
Generally, the first reduction factor can be selected to be a number less than 1 and greater than 0, such as 0.9 or 0.8.
The execution condition of step S105 is that the reference total power limiting capacity is greater than the target total power limiting capacity, but when the reference total power limiting capacity is less than the target total power limiting capacity, it indicates that the current power limiting scheme cannot be used. At this time, the first synchronization rate needs to be adjusted, and then step S101 is executed again.
That is, the method provided by the present application further includes:
and if the reference total power limiting capacity is smaller than the target total power limiting capacity, adjusting the preset first concurrence rate by using a second reduction coefficient, and respectively calculating a second concurrence rate of each wind power plant according to the preset first concurrence rate and the relative power limiting proportion of the wind power plants.
Similarly to the first reduction coefficient, the purpose of the second reduction coefficient is to reduce the value, and the object reduced by the second reduction coefficient is the first synchronization rate, for example, the first synchronization rate can be reduced by about 1% -2% each time.
The method provided by the invention can improve the power limiting stability and fairness by introducing the abandoned wind sequencing according to the set relative power limiting proportion and the set total power limiting amount under the condition of not transforming the existing wind power point field equipment. Specifically, the characteristics of the scheme are mainly embodied from the following aspects:
1) considering individual differences (electric quantity completion condition, economy, performance assessment and the like) of wind power point fields, wind abandoning sequencing is carried out on each wind power plant, the power limiting rate of the wind power plant with the front sequence position is higher (the power limiting deviation ratio is smaller, the target output is smaller, the power limiting quantity is large, namely the power limiting rate is high) and the corresponding borne power limiting ratio is larger.
2) In the abandoned wind sequencing, the difference values of the power limiting deviation ratios of any two adjacent ranked wind power plants are equal, so that the wind power plants can stably and quickly complete the total power limiting task when abandoned wind and limited power.
3) When the reference total power limit capacity is smaller than the target total power limit capacity, the first coincidence rate is adjusted by a certain amplitude, so that the scheme gives consideration to both economy and safety.
Corresponding to the above method, the present application also provides a wind-abandoning and electricity-limiting device, as shown in fig. 4, including:
the first calculating module 401 is configured to calculate a second concurrence rate of each wind power plant according to a preset first concurrence rate and a relative power limit ratio of the wind power plants;
a second calculating module 402, configured to calculate the power limit capacity of each wind power plant according to the second concurrence rate of each wind power plant and the installed capacity of each wind power plant;
a third calculating module 403, configured to calculate a target output of each wind power plant according to the power limit capacity of each wind power plant and the installed capacity of each wind power plant;
a first judging module 404, configured to judge whether the reference total limited power capacity is greater than the target total limited power capacity; the reference total power limiting capacity is calculated according to the power limiting capacities of the wind power plants;
and the control module 405 is configured to limit the power according to the target output of each wind power plant if the reference total power limiting capacity is greater than the target total power limiting capacity.
Preferably, the method further comprises the following steps:
and the fourth calculation module is used for calculating the preset first synchronous rate according to the total real-time output of the wind power plant, the total required electricity limiting amount and the total rated machine capacity of the wind power plant.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A wind-abandoning and electricity-limiting method is characterized by comprising the following steps:
respectively calculating a second synchronous rate of each wind power plant according to a preset first synchronous rate and a relative power limiting ratio of the wind power plants;
respectively calculating the power limit capacity of each wind power plant according to the second synchronous rate of each wind power plant and the installed capacity of each wind power plant;
calculating the target output of each wind power plant according to the limited capacity of each wind power plant and the installed capacity of each wind power plant;
judging whether the reference total power limit capacity is larger than the target total power limit capacity; the reference total power limiting capacity is calculated according to the power limiting capacities of the wind power plants;
and if the reference total power limiting capacity is larger than the target total power limiting capacity, limiting the power according to the target output of each wind power plant.
2. The method of claim 1, further comprising:
and calculating the preset first synchronous rate according to the total real-time output of the wind power plant, the total required electricity limiting amount and the total rated machine capacity of the wind power plant.
3. The method of claim 1, wherein calculating the second concurrence rate of each wind power plant separately from the preset first concurrence rate and the relative power limit ratio of the wind power plants comprises:
respectively calculating the power limit deviation ratio of each wind power plant according to the ranking of each wind power plant in the abandoned wind sequence and the relative power limit ratio of the wind power plants; the relative electricity limiting proportion of the wind power plant is used for representing electricity limiting deviation ratios corresponding to different ranks in the abandoned wind sequence;
and respectively calculating a second coincidence rate of each wind power plant according to the power limit deviation ratio of each wind power plant and a preset first coincidence rate.
4. The method of claim 1, further comprising, after calculating the target output for each wind power plant based on the power-limiting capacity of each wind power plant and the installed capacity of each wind power plant:
judging whether the target output of the target wind power plant is greater than the real-time output of the target wind power plant;
and if the target output of the target wind power plant is not greater than the real-time output of the target wind power plant, executing the step to judge whether the reference total power limiting capacity is greater than the target total power limiting capacity.
5. The method of claim 4, further comprising:
and if the target output of the target wind power plant is larger than the real-time output of the target wind power plant, recalculating the target output of the target wind power plant according to the real-time output of the target wind power plant and a preset first reduction coefficient.
6. The method of claim 1, further comprising:
and if the reference total power limiting capacity is smaller than the target total power limiting capacity, adjusting the preset first concurrence rate by using a second reduction coefficient, and respectively calculating a second concurrence rate of each wind power plant according to the preset first concurrence rate and the relative power limiting proportion of the wind power plants.
7. The method of claim 1, wherein the ranking of wind power plants in the wind curtailment ranking is calculated according to the following parameters: yesterday planning power, yesterday actual completion power, this month planning power, this month actual completion power, this month power limiting power, this month excess power generation and predetermined punishment parameters.
8. The method of claim 1, wherein limiting power according to a target output for each wind power plant comprises:
and respectively sending the target output of the wind power plants to each power plant so that each wind power plant works according to the corresponding target treatment.
9. A wind-abandoning electricity-limiting device is characterized by comprising:
the first calculation module is used for respectively calculating a second synchronous rate of each wind power plant according to a preset first synchronous rate and the relative power limiting proportion of the wind power plants;
the second calculation module is used for calculating the power limiting capacity of each wind power plant according to the second synchronous rate of each wind power plant and the installed capacity of each wind power plant;
the third calculation module is used for calculating the target output of each wind power plant according to the limited capacity of each wind power plant and the installed capacity of each wind power plant;
the first judgment module is used for judging whether the reference total power limit capacity is larger than the target total power limit capacity or not; the reference total power limiting capacity is calculated according to the power limiting capacities of the wind power plants;
and the control module is used for limiting the power according to the target output of each wind power plant if the reference total power limiting capacity is larger than the target total power limiting capacity.
10. The apparatus of claim 9, further comprising:
and the fourth calculation module is used for calculating the preset first synchronous rate according to the total real-time output of the wind power plant, the total required electricity limiting amount and the total rated machine capacity of the wind power plant.
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