CN111260174A - New energy station power generation plan making method and device - Google Patents

New energy station power generation plan making method and device Download PDF

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CN111260174A
CN111260174A CN201910747957.5A CN201910747957A CN111260174A CN 111260174 A CN111260174 A CN 111260174A CN 201910747957 A CN201910747957 A CN 201910747957A CN 111260174 A CN111260174 A CN 111260174A
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CN111260174B (en
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黄越辉
李湃
董凌
王伟胜
刘纯
李希
王跃峰
李延和
徐有蕊
杨洪志
梁昌波
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State Grid Corp of China SGCC
China Electric Power Research Institute Co Ltd CEPRI
State Grid Qinghai Electric Power Co Ltd
Electric Power Research Institute of State Grid Qinghai Electric Power Co Ltd
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China Electric Power Research Institute Co Ltd CEPRI
State Grid Qinghai Electric Power Co Ltd
Electric Power Research Institute of State Grid Qinghai Electric Power Co Ltd
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Abstract

The invention relates to a method and a device for making a power generation plan of a new energy station, wherein the method comprises the following steps: dividing the power transmission section into a plurality of layers of nested sections according to the voltage grade of the power transmission section; determining the peak-regulating and limiting electric power value of each section in each layer of nested sections according to the limited power generation capacity of each section in each layer of nested sections and the predicted output of each section in each layer of nested sections; and determining the power generation plan of each section in each layer of nested sections by using the peak-regulating and current-limiting power value of each section in each layer of nested sections. The technical scheme provided by the invention can keep the power limit rate of the new energy in each area of the power grid consistent, and realizes the fair distribution principle of the power limit power.

Description

New energy station power generation plan making method and device
Technical Field
The invention relates to the technical field of new energy dispatching operation, in particular to a method and a device for making a power generation plan of a new energy station.
Background
The planning of power generation at new energy stations is an important daily routine work for the power dispatching department. Taking a day-ahead power generation plan as an example, the new energy station needs to report the predicted output of 96 points in the day-ahead of the station every morning, and after the power dispatching department summarizes the day-ahead predicted outputs of all the new energy stations, the factors of the receiving space of the whole network, the peak regulation capacity, the power transmission capacity of the section of the main area and the like are comprehensively considered, and a day-ahead power generation plan of each new energy station is made. Under the condition that the power grid is not limited, according to the stipulation of renewable energy law in China, the power grid needs to fully accept new energy, namely all new energy stations generate power according to predicted output; under the condition that the power limit of a power grid occurs, a dispatching department needs to make a power generation plan of each new energy station according to the principles of fairness, justice and openness so as to keep the total power limit rate of all the new energy stations in the whole power grid consistent. The new energy power limiting type mainly comprises two types, namely, the section power limiting, namely the power generation capacity of the new energy is limited due to the limitation of the channel capacity of a connecting line; and the other is peak regulation and power limitation, namely power limitation caused by the fact that a conventional power supply occupies a power generation space. With the rapid increase of the installed capacity of new energy, the phenomenon of power limitation of a power grid is more and more common, and the influence factors of power limitation are more and more caused by the complex structure of the power grid, so that greater challenges and difficulties are provided for a dispatching department to make a new energy power generation plan.
Aiming at two different electricity limiting types of section electricity limiting and peak load regulation electricity limiting, the power generation plan of each station needs to be formulated by comprehensively considering the regional section transmission capacity and the real-time new energy power generation level. The existing method is mainly based on a manual mode, and the defects are mainly reflected in that: firstly, when nested sections exist in a power grid and the number of the sections is too large, the difficulty of manual adjustment is greatly increased, and the fairness of power generation plan formulation is influenced; secondly, under the condition that part of the sections are severely limited, the peak regulation and electricity limiting quantity of the whole network needs to be distributed to new energy stations in other areas to ensure the electricity limiting fairness of all the areas, and the difficulty of manual adjustment is further increased. Aiming at the defects of a manual method, part of scholars formulate a power generation plan by establishing an optimization model, the existing optimization model for formulating the power generation plan takes the minimum square sum of the ratios of the limited electric quantity and the installed capacity of all the new energy station as an optimization target, considers constraint conditions such as power grid section limitation and peak regulation capacity and the like, and realizes the optimization of the power generation plan of the new energy station by establishing and solving a target secondary optimization model. However, the method limits the electricity in equal proportion according to the installed capacity of new energy rather than the real-time output of the stations, and causes inconsistency of the electricity limiting rate of each station; secondly, the method needs to establish and solve a secondary optimization model, and when the power grid comprises a plurality of complex nested section structures, the optimization model has numerous variables and longer solving time, and the timeliness requirement of power generation plan formulation of a dispatching department is difficult to meet.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a new energy station power generation plan making method which can keep the power limit of new energy in each area of a power grid consistent, realizes the fair distribution principle of the power limit power, meets the timeliness of making a power generation plan by a dispatching department and saves manpower.
The purpose of the invention is realized by adopting the following technical scheme:
in a new energy station power generation planning method, the improvement comprising:
dividing the power transmission section into a plurality of layers of nested sections according to the voltage grade of the power transmission section;
determining the peak-regulating and limiting electric power value of each section in each layer of nested sections according to the limited power generation capacity of each section in each layer of nested sections and the predicted output of each section in each layer of nested sections;
and determining the power generation plan of each section in each layer of nested sections by using the peak-regulating and current-limiting power value of each section in each layer of nested sections.
Preferably, the dividing the power transmission section into a plurality of layers of nested sections according to the voltage level of the power transmission section includes:
enabling the power transmission sections with the same voltage level to be nested sections in the same layer, and defining the voltage level of the power transmission section in each nested section as the voltage level corresponding to the nested section in the layer;
and performing descending order arrangement on each layer of nested sections according to the voltage level, connecting the power transmission sections in each layer of nested sections with the power transmission sections with physical connection relation in the upper layer of nested sections to obtain the topological structure of the multi-layer nested sections, and determining the 1 st layer, the 2 nd layer and the M-th layer of nested sections according to the sequence of the voltage level from high to low.
Preferably, the determining the peak-load limiting electric power value of each section in each nested section according to the limited power generation capacity of each section in each nested section and the predicted output of each section in each nested section includes:
substituting the power generation capacity and the predicted output of each limited section in the 1 st layer of nested sections into a pre-established first power limiting proportion square sum model, and solving the first power limiting proportion square sum model to obtain the peak regulating and power limiting power value of each section in the 1 st layer of nested sections;
and substituting the limited power generation capacity and the predicted output of each section in the 2 nd-M layer nested sections into a pre-established second power limiting proportion square sum model, and solving the second power limiting proportion square sum model to obtain the peak-regulating power limiting power value of each section in the 2 nd-M layer nested sections.
Further, the first power-limiting proportional-sum-of-squares model includes a first objective function and a first constraint;
wherein the first objective function f' is determined as follows:
Figure BDA0002165614090000021
the first constraint condition is as follows:
Figure BDA0002165614090000031
in the above formula, the first and second carbon atoms are,
Figure BDA0002165614090000032
the peak-regulating and electric-limiting power value of the ith section in the 1 st nested section,
Figure BDA0002165614090000033
for the predicted force of the ith section in the layer 1 nested section,
Figure BDA0002165614090000034
the power generation capacity of the ith section in the 1 st layer of nested sections after being limited, y is the peak-load-regulating and power-limiting total power value of the power grid, N1Is the total number of the fracture surfaces in the layer 1 nested fracture surface.
Further, the peak-load-limiting total power value y of the power grid is determined according to the following formula:
Figure BDA0002165614090000035
wherein the content of the first and second substances,
Figure BDA0002165614090000036
the generating capacity N of the ith section in the 1 st layer of nested sections after being limited1The total number of the sections in the 1 st nested section is shown, and b is a new energy receiving space of the power grid.
Further, the second power-limiting proportional-sum-of-squares model includes a second objective function and a second constraint condition;
wherein the second objective function f is determined as follows:
Figure BDA0002165614090000037
the second constraint condition is as follows:
Figure BDA0002165614090000038
in the above formula, the first and second carbon atoms are,
Figure BDA0002165614090000039
the peak-regulating and electric-limiting power value of the ith section in the mth layer nested section,
Figure BDA00021656140900000310
for the predicted force of the ith section in the mth layer of nested sections,
Figure BDA00021656140900000311
the power generation capacity of the ith section in the mth layer of nested sections after being limited,
Figure BDA00021656140900000312
is a section set in the mth layer nested section and has a connection relation with the jth section in the (m-1) th layer nested section,
Figure BDA00021656140900000313
is the m-1 layer of nested cross sectionPeak-regulating and electric-limiting power values of j sections, j belongs to [1, N ]m-1]，Nm-1Is the total number of fracture surfaces in the (M-1) th nested fracture surface, and M belongs to [2, M ∈]And M is the total number of the multilayer nested sections.
Preferably, the process of obtaining the predicted output force of each section in each layer of nested sections includes:
step 1: acquiring the predicted output of each section in the M-th layer of nested sections;
step 2: initializing n-M;
and step 3: determining the predicted output force of the r section in the n-1 layer nested section by using the predicted output force of the section which has a connection relation with the r section in the n-1 layer nested section in the n layer nested section;
and 4, step 4: if n is equal to 1, ending the operation, otherwise, making n equal to n-1 and returning to the step 3;
wherein r is ∈ [1, N ∈ >n-1]，Nn-1Is the total number of fracture surfaces in the n-1 layer nested fracture surface, n belongs to [1, M ]]And M is the total number of the multilayer nested sections.
Preferably, the step 3 includes:
the predicted output of the r section in the n-1 layer nested sections is determined according to the following formula
Figure BDA0002165614090000041
Figure BDA0002165614090000042
In the above formula, the first and second carbon atoms are,
Figure BDA0002165614090000043
for the predicted force of the l section in the n-th layer nesting section,
Figure BDA0002165614090000044
is a section set in the N-th layer of nested sections and in the N-1-th layer of nested sections with the connection relation with the r-th section, and r belongs to [1, N ∈n-1]，Nn-1Is the total number of the fracture surfaces in the n-1 layer nested fracture surface.
Further, the process of acquiring the power generation capacity of each limited section in each layer of nested sections comprises:
step S1: determining the power generation capacity of each section in the M-th layer of nested sections after being limited by the aid of the predicted output of each section in the M-th layer of nested sections:
step S2: initializing k as M;
step S3: determining the power generation capacity of the k-1 layer of nested fracture surface after the q section is limited by using the power generation capacity of the k layer of nested fracture surface after the fracture surface is limited, wherein the power generation capacity of the k layer of nested fracture surface has a connection relation with the q section of the k-1 layer of nested fracture surface;
step S4: if k is equal to 1, ending the operation, otherwise, making k equal to k-1 and returning to the step 3;
wherein q is ∈ [1, N ∈k-1]，Nk-1Is the total number of fracture surfaces in the k-1 layer nested fracture surface, and k belongs to [1, M ]]And M is the total number of the multilayer nested sections.
Further, the step S1 includes:
determining the power generation capacity of the M-th nested section after the p-th section is limited according to the following formula
Figure BDA0002165614090000045
Figure BDA0002165614090000046
Wherein the content of the first and second substances,
Figure BDA0002165614090000047
for the predicted force of the p-th section in the M-th layer nesting section,
Figure BDA0002165614090000048
for the receiving space of the p section in the M layer nesting section, p is the [1, N ]M]，NMThe total number of the fracture surfaces in the M-th layer of nested fracture surfaces is shown, and M is the total number of the multilayer nested fracture surfaces.
Further, the step S3 includes:
determining that the q section in the k-1 layer nested section is limited according to the following formulaPower generation capability of
Figure BDA0002165614090000051
Figure BDA0002165614090000052
Wherein the content of the first and second substances,
Figure BDA0002165614090000053
the power generation capacity of the kth section in the kth layer of nested sections after being limited,
Figure BDA0002165614090000054
the receiving space of the q section in the k-1 layer nesting section,
Figure BDA0002165614090000055
a section set with a connection relation between the kth section and the qth section in the kth-1 layer nested section is formed, and q belongs to [1, N ∈k-1]，Nk-1Is the total number of fracture surfaces in the k-1 layer nested fracture surface, and k belongs to [1, M ]]And M is the total number of the multilayer nested sections.
Preferably, the determining the power generation plan of each section in each nested section by using the peak-shaving and power-limiting power value of each section in each nested section includes:
determining a power generation plan of an h section in an n layer of nested sections according to the following formula
Figure BDA0002165614090000056
Figure BDA0002165614090000057
In the above formula, the first and second carbon atoms are,
Figure BDA0002165614090000058
the power generation capacity of the h section in the n-th layer of nested sections after being limited,
Figure BDA0002165614090000059
the peak-regulating and current-limiting power value of the h section in the N-th layer of nested sections is h belongs to [1, N ]n]，NnIs the total number of fracture surfaces in the n-th layer of nested fracture surfaces, and n belongs to [1, M ]]And M is the total number of the multilayer nested sections.
In a new energy station power generation planning apparatus, the improvement comprising:
the dividing unit is used for dividing the power transmission section into a plurality of layers of nested sections according to the voltage level of the power transmission section;
the first determining unit is used for determining the peak-regulating and power-limiting power value of each section in each layer of nested sections according to the limited power generation capacity of each section in each layer of nested sections and the predicted output of each section in each layer of nested sections;
and the second determining unit is used for determining the power generation plan of each section in each layer of nested sections by using the peak-regulating and power-limiting power value of each section in each layer of nested sections.
Compared with the closest prior art, the invention has the following beneficial effects:
according to the technical scheme provided by the invention, the power transmission section is divided into a plurality of layers of nested sections according to the voltage grade of the power transmission section; determining the peak-regulating and limiting electric power value of each section in each layer of nested sections according to the limited power generation capacity of each section in each layer of nested sections and the predicted output of each section in each layer of nested sections; determining a power generation plan of each section in each layer of nested sections by using the peak-regulating and current-limiting power value of each section in each layer of nested sections; based on the technical scheme provided by the invention, the new energy power limit rates of all areas of the power grid can be kept consistent, the fair distribution principle of the power limit power is realized, the timeliness of the power generation plan formulation of a dispatching department can be met, and the manpower is saved.
Drawings
FIG. 1 is a flow chart of a new energy station power generation planning method provided by the invention;
FIG. 2 is a topological diagram of a power grid structure with nested sections according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a new energy station power generation plan making device provided by the invention.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a new energy station power generation plan making method, as shown in figure 1, comprising the following steps:
101. dividing the power transmission section into a plurality of layers of nested sections according to the voltage grade of the power transmission section;
102. determining the peak-regulating and limiting electric power value of each section in each layer of nested sections according to the limited power generation capacity of each section in each layer of nested sections and the predicted output of each section in each layer of nested sections;
103. and determining the power generation plan of each section in each layer of nested sections by using the peak-regulating and current-limiting power value of each section in each layer of nested sections.
Further, the step 101 specifically includes:
enabling the power transmission sections with the same voltage level to be nested sections in the same layer, and defining the voltage level of the power transmission section in each nested section as the voltage level corresponding to the nested section in the layer;
and performing descending order arrangement on each layer of nested sections according to the voltage level, connecting the power transmission sections in each layer of nested sections with the power transmission sections with physical connection relation in the upper layer of nested sections to obtain the topological structure of the multi-layer nested sections, and determining the 1 st layer, the 2 nd layer and the M-th layer of nested sections according to the sequence of the voltage level from high to low.
After dividing the power transmission section into multiple layers of nested sections, determining a peak-adjusting and power-limiting power value of each section in each layer of nested sections according to the limited power generation capacity of each section in each layer of nested sections and the predicted output of each section in each layer of nested sections, and therefore step 102 specifically includes:
substituting the power generation capacity and the predicted output of each limited section in the 1 st layer of nested sections into a pre-established first power limiting proportion square sum model, and solving the first power limiting proportion square sum model to obtain the peak regulating and power limiting power value of each section in the 1 st layer of nested sections;
and substituting the limited power generation capacity and the predicted output of each section in the 2 nd-M layer nested sections into a pre-established second power limiting proportion square sum model, and solving the second power limiting proportion square sum model to obtain the peak-regulating power limiting power value of each section in the 2 nd-M layer nested sections.
Before the step 102, the predicted output of each section in each layer of nested sections and the power generation capacity of each section in each layer of nested sections after being limited need to be obtained, so the process of obtaining the predicted output of each section in each layer of nested sections includes:
step 1: acquiring the predicted output of each section in the M-th layer of nested sections;
step 2: initializing n-M;
and step 3: determining the predicted output force of the r section in the n-1 layer nested section by using the predicted output force of the section which has a connection relation with the r section in the n-1 layer nested section in the n layer nested section;
and 4, step 4: if n is equal to 1, ending the operation, otherwise, making n equal to n-1 and returning to the step 3;
wherein r is ∈ [1, N ∈ >n-1]，Nn-1Is the total number of fracture surfaces in the n-1 layer nested fracture surface, n belongs to [1, M ]]And M is the total number of the multilayer nested sections.
The step 3 comprises the following steps:
the predicted output of the r section in the n-1 layer nested sections is determined according to the following formula
Figure BDA0002165614090000071
Figure BDA0002165614090000072
In the above formula, the first and second carbon atoms are,
Figure BDA0002165614090000073
for the predicted force of the l section in the n-th layer nesting section,
Figure BDA0002165614090000074
is a section set in the N-th layer of nested sections and in the N-1-th layer of nested sections with the connection relation with the r-th section, and r belongs to [1, N ∈n-1]，Nn-1Is the total number of the fracture surfaces in the n-1 layer nested fracture surface.
The process for acquiring the power generation capacity of each limited section in each layer of nested sections comprises the following steps:
step S1: determining the power generation capacity of each section in the M-th layer of nested sections after being limited by the aid of the predicted output of each section in the M-th layer of nested sections:
step S2: initializing k as M;
step S3: determining the power generation capacity of the k-1 layer of nested fracture surface after the q section is limited by using the power generation capacity of the k layer of nested fracture surface after the fracture surface is limited, wherein the power generation capacity of the k layer of nested fracture surface has a connection relation with the q section of the k-1 layer of nested fracture surface;
step S4: if k is equal to 1, ending the operation, otherwise, making k equal to k-1 and returning to the step 3;
wherein q is ∈ [1, N ∈k-1]，Nk-1Is the total number of fracture surfaces in the k-1 layer nested fracture surface, and k belongs to [1, M ]]And M is the total number of the multilayer nested sections.
The step S1 includes:
determining the power generation capacity of the M-th nested section after the p-th section is limited according to the following formula
Figure BDA0002165614090000081
Figure BDA0002165614090000082
Wherein the content of the first and second substances,
Figure BDA0002165614090000083
for the predicted force of the p-th section in the M-th layer nesting section,
Figure BDA0002165614090000084
for the receiving space of the p section in the M layer nesting section, p is the [1, N ]M]，NMThe total number of the fracture surfaces in the M-th layer of nested fracture surfaces is shown, and M is the total number of the multilayer nested fracture surfaces.
The step S3 includes:
determining the power generation capacity of the k-1 layer of nested fracture surface after the q fracture surface is limited according to the following formula
Figure BDA0002165614090000085
Figure BDA0002165614090000086
Wherein the content of the first and second substances,
Figure BDA0002165614090000087
the power generation capacity of the kth section in the kth layer of nested sections after being limited,
Figure BDA0002165614090000088
the receiving space of the q section in the k-1 layer nesting section,
Figure BDA0002165614090000089
a section set with a connection relation between the kth section and the qth section in the kth-1 layer nested section is formed, and q belongs to [1, N ∈k-1]，Nk-1Is the total number of fracture surfaces in the k-1 layer nested fracture surface, and k belongs to [1, M ]]And M is the total number of the multilayer nested sections.
The first power-limiting proportional-sum-of-squares model in step 102 comprises a first objective function and a first constraint;
wherein the first objective function f' is determined as follows:
Figure BDA00021656140900000810
the first constraint condition is as follows:
Figure BDA00021656140900000811
in the above formula, the first and second carbon atoms are,
Figure BDA00021656140900000812
the peak-regulating and electric-limiting power value of the ith section in the 1 st nested section,
Figure BDA00021656140900000813
for the predicted force of the ith section in the layer 1 nested section,
Figure BDA00021656140900000814
the power generation capacity of the ith section in the 1 st layer of nested sections after being limited, y is the peak-load-regulating and power-limiting total power value of the power grid, N1Is the total number of the fracture surfaces in the layer 1 nested fracture surface.
Solving the first power limiting proportional square sum model by using a commercial solver to obtain the peak-regulating and power-limiting power value of each section in the 1 st layer of nested sections
Figure BDA00021656140900000815
The process for acquiring the peak regulation and current limiting total power value y of the power grid comprises the following steps:
determining the peak regulation and power limitation total power value y of the power grid according to the following formula:
Figure BDA0002165614090000091
wherein the content of the first and second substances,
Figure BDA0002165614090000092
the generating capacity N of the ith section in the 1 st layer of nested sections after being limited1B is the total number of the sections in the 1 st nested section and b is the new energy admission of the power gridA space.
And distributing the peak-load-adjusting electricity-limiting total power value y of the power grid to all sections in the layer 1 nested sections.
The second power-limiting proportional-sum-of-squares model in step 102 comprises a second objective function and a second constraint;
wherein the second objective function f is determined as follows:
Figure BDA0002165614090000093
the second constraint condition is as follows:
Figure BDA0002165614090000094
in the above formula, the first and second carbon atoms are,
Figure BDA0002165614090000095
the peak-regulating and electric-limiting power value of the ith section in the mth layer nested section,
Figure BDA0002165614090000096
for the predicted force of the ith section in the mth layer of nested sections,
Figure BDA0002165614090000097
the power generation capacity of the ith section in the mth layer of nested sections after being limited,
Figure BDA0002165614090000098
is a section set in the mth layer nested section and has a connection relation with the jth section in the (m-1) th layer nested section,
Figure BDA0002165614090000099
the peak-regulating and current-limiting power value of the jth section in the (m-1) th layer nested section is j belongs to [1, N ]m-1]，Nm-1Is the total number of fracture surfaces in the (M-1) th nested fracture surface, and M belongs to [2, M ∈]And M is the total number of the multilayer nested sections.
And solving the second power limiting proportional square sum model by using a commercial solver to obtain the peak-regulating and power-limiting power value of each section in the 2 nd-M layer nested sections.
Determining the peak-regulating and power-limiting power value of each section in each layer of nested sections, and determining the power generation plan of each section in each layer of nested sections by using the peak-regulating and power-limiting power value of each section in each layer of nested sections, therefore, step 103 comprises:
determining a power generation plan of an h section in an n layer of nested sections according to the following formula
Figure BDA00021656140900000910
Figure BDA00021656140900000911
In the above formula, the first and second carbon atoms are,
Figure BDA00021656140900000912
the power generation capacity of the h section in the n-th layer of nested sections after being limited,
Figure BDA00021656140900000913
the peak-regulating and current-limiting power value of the h section in the N-th layer of nested sections is h belongs to [1, N ]n]，NnIs the total number of fracture surfaces in the n-th layer of nested fracture surfaces, and n belongs to [1, M ]]And M is the total number of the multilayer nested sections.
Based on the same concept of the new energy station power generation plan making method, the invention also provides a new energy station power generation plan making device, as shown in fig. 3, the device comprises:
the dividing unit is used for dividing the power transmission section into a plurality of layers of nested sections according to the voltage level of the power transmission section;
the first determining unit is used for determining the peak-regulating and power-limiting power value of each section in each layer of nested sections according to the limited power generation capacity of each section in each layer of nested sections and the predicted output of each section in each layer of nested sections;
and the second determining unit is used for determining the power generation plan of each section in each layer of nested sections by using the peak-regulating and power-limiting power value of each section in each layer of nested sections.
The dividing unit includes:
the defining module is used for enabling the power transmission sections with the same voltage grade to be nested sections in the same layer, and defining the voltage grade of the power transmission section in each nested section as the voltage grade corresponding to the nested section in the layer;
and the acquisition module is used for performing descending order arrangement on each layer of nested fracture surfaces according to the voltage level, connecting the power transmission fracture surface in each layer of nested fracture surface with the power transmission fracture surface with a physical connection relation in the upper layer of nested fracture surface, acquiring the topological structure of the multi-layer nested fracture surfaces, and determining the 1 st layer, the 2 nd layer and the up to M-th layer of nested fracture surfaces according to the sequence of the voltage level from high to low.
The first determination unit includes:
the first acquisition module is used for substituting the power generation capacity and the predicted output of each limited section in the 1 st layer of nested sections into a pre-established first power limiting proportion square sum model, solving the first power limiting proportion square sum model and acquiring the peak-regulating and power-limiting power value of each section in the 1 st layer of nested sections;
and the second acquisition module is used for substituting the power generation capacity and the predicted output after each section in the 2 nd-M layer nested sections is limited into a pre-established second power limiting proportion square sum model, solving the second power limiting proportion square sum model and acquiring the peak-regulating and power-limiting power value of each section in the 2 nd-M layer nested sections.
The first power-limiting proportional-sum-of-squares model comprises a first objective function and a first constraint condition;
wherein the first objective function f' is determined as follows:
Figure BDA0002165614090000101
the first constraint condition is as follows:
Figure BDA0002165614090000102
in the above formula, the first and second carbon atoms are,
Figure BDA0002165614090000103
the peak-regulating and electric-limiting power value of the ith section in the 1 st nested section,
Figure BDA0002165614090000104
for the predicted force of the ith section in the layer 1 nested section,
Figure BDA0002165614090000105
the power generation capacity of the ith section in the 1 st layer of nested sections after being limited, y is the peak-load-regulating and power-limiting total power value of the power grid, N1Is the total number of the fracture surfaces in the layer 1 nested fracture surface.
Determining the peak regulation and power limitation total power value y of the power grid according to the following formula:
Figure BDA0002165614090000111
wherein the content of the first and second substances,
Figure BDA0002165614090000112
the generating capacity N of the ith section in the 1 st layer of nested sections after being limited1The total number of the sections in the 1 st nested section is shown, and b is a new energy receiving space of the power grid.
The second power-limiting proportional-sum-of-squares model comprises a second objective function and a second constraint condition;
wherein the second objective function f is determined as follows:
Figure BDA0002165614090000113
the second constraint condition is as follows:
Figure BDA0002165614090000114
in the above formula, the first and second carbon atoms are,
Figure BDA0002165614090000115
the peak-regulating and electric-limiting power value of the ith section in the mth layer nested section,
Figure BDA0002165614090000116
for the predicted force of the ith section in the mth layer of nested sections,
Figure BDA0002165614090000117
the power generation capacity of the ith section in the mth layer of nested sections after being limited,
Figure BDA0002165614090000118
is a section set in the mth layer nested section and has a connection relation with the jth section in the (m-1) th layer nested section,
Figure BDA0002165614090000119
the peak-regulating and current-limiting power value of the jth section in the (m-1) th layer nested section is j belongs to [1, N ]m-1]，Nm-1Is the total number of fracture surfaces in the (M-1) th nested fracture surface, and M belongs to [2, M ∈]And M is the total number of the multilayer nested sections.
Before the first determining unit, a first acquiring unit and a second acquiring unit are further included;
the first acquisition unit is used for acquiring the predicted output force of each section in each layer of nested sections;
the second obtaining unit is used for obtaining the power generation capacity of each layer of nested fracture surface after each fracture surface is limited.
The first obtaining unit is specifically configured to: step 1: acquiring the predicted output of each section in the M-th layer of nested sections;
step 2: initializing n-M;
and step 3: determining the predicted output force of the r section in the n-1 layer nested section by using the predicted output force of the section which has a connection relation with the r section in the n-1 layer nested section in the n layer nested section;
and 4, step 4: if n is equal to 1, ending the operation, otherwise, making n equal to n-1 and returning to the step 3;
wherein r is ∈ [1, N ∈ >n-1]，Nn-1Is the total number of fracture surfaces in the n-1 layer nested fracture surface, n belongs to [1, M ]]And M is the total number of the multilayer nested sections.
The step 3 comprises the following steps:
the predicted output of the r section in the n-1 layer nested sections is determined according to the following formula
Figure BDA0002165614090000121
Figure BDA0002165614090000122
In the above formula, the first and second carbon atoms are,
Figure BDA0002165614090000123
for the predicted force of the l section in the n-th layer nesting section,
Figure BDA0002165614090000124
is a section set in the N-th layer of nested sections and in the N-1-th layer of nested sections with the connection relation with the r-th section, and r belongs to [1, N ∈n-1]，Nn-1Is the total number of the fracture surfaces in the n-1 layer nested fracture surface.
The second obtaining unit is specifically configured to: step S1: determining the power generation capacity of each section in the M-th layer of nested sections after being limited by the aid of the predicted output of each section in the M-th layer of nested sections:
step S2: initializing k as M;
step S3: determining the power generation capacity of the k-1 layer of nested fracture surface after the q section is limited by using the power generation capacity of the k layer of nested fracture surface after the fracture surface is limited, wherein the power generation capacity of the k layer of nested fracture surface has a connection relation with the q section of the k-1 layer of nested fracture surface;
step S4: if k is equal to 1, ending the operation, otherwise, making k equal to k-1 and returning to the step 3;
wherein q is ∈ [1, N ∈k-1]，Nk-1Is the total number of fracture surfaces in the k-1 layer nested fracture surface, and k belongs to [1, M ]]And M is the total number of the multilayer nested sections.
The step S1 includes:
determining the power generation capacity of the M-th nested section after the p-th section is limited according to the following formula
Figure BDA0002165614090000125
Figure BDA0002165614090000126
Wherein the content of the first and second substances,
Figure BDA0002165614090000127
for the predicted force of the p-th section in the M-th layer nesting section,
Figure BDA0002165614090000128
for the receiving space of the p section in the M layer nesting section, p is the [1, N ]M]，NMThe total number of the fracture surfaces in the M-th layer of nested fracture surfaces is shown, and M is the total number of the multilayer nested fracture surfaces.
The step S3 includes:
determining the power generation capacity of the k-1 layer of nested fracture surface after the q fracture surface is limited according to the following formula
Figure BDA0002165614090000129
Figure BDA00021656140900001210
Wherein the content of the first and second substances,
Figure BDA00021656140900001211
the power generation capacity of the kth section in the kth layer of nested sections after being limited,
Figure BDA00021656140900001212
the receiving space of the q section in the k-1 layer nesting section,
Figure BDA0002165614090000131
a section set with a connection relation between the kth section and the qth section in the kth-1 layer nested section is formed, and q belongs to [1, N ∈k-1]，Nk-1Is the total number of fracture surfaces in the k-1 layer nested fracture surface, and k belongs to [1, M ]]M is the total layer of the multi-layer nested fracture surfaceAnd (4) counting.
The second determining unit is specifically configured to:
determining a power generation plan of an h section in an n layer of nested sections according to the following formula
Figure BDA0002165614090000132
Figure BDA0002165614090000133
In the above formula, the first and second carbon atoms are,
Figure BDA0002165614090000134
the power generation capacity of the h section in the n-th layer of nested sections after being limited,
Figure BDA0002165614090000135
the peak-regulating and current-limiting power value of the h section in the N-th layer of nested sections is h belongs to [1, N ]n]，NnIs the total number of fracture surfaces in the n-th layer of nested fracture surfaces, and n belongs to [1, M ]]And M is the total number of the multilayer nested sections.
As will be appreciated by one skilled in the art, 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 flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams 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 solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.

Claims (13)

1. A new energy station power generation planning method is characterized by comprising the following steps:
dividing the power transmission section into a plurality of layers of nested sections according to the voltage grade of the power transmission section;
determining the peak-regulating and limiting electric power value of each section in each layer of nested sections according to the limited power generation capacity of each section in each layer of nested sections and the predicted output of each section in each layer of nested sections;
and determining the power generation plan of each section in each layer of nested sections by using the peak-regulating and current-limiting power value of each section in each layer of nested sections.
2. The method of claim 1, wherein said dividing the power transmission sections into multiple layers of nested sections based on voltage levels of the power transmission sections comprises:
enabling the power transmission sections with the same voltage level to be nested sections in the same layer, and defining the voltage level of the power transmission section in each nested section as the voltage level corresponding to the nested section in the layer;
and performing descending order arrangement on each layer of nested sections according to the voltage level, connecting the power transmission sections in each layer of nested sections with the power transmission sections with physical connection relation in the upper layer of nested sections to obtain the topological structure of the multi-layer nested sections, and determining the 1 st layer, the 2 nd layer and the M-th layer of nested sections according to the sequence of the voltage level from high to low.
3. The method of claim 1, wherein determining the peak-to-peak power-limiting value of each of the nested sections based on the limited power generation capacity of each of the nested sections and the predicted throughput of each of the nested sections comprises:
substituting the power generation capacity and the predicted output of each limited section in the 1 st layer of nested sections into a pre-established first power limiting proportion square sum model, and solving the first power limiting proportion square sum model to obtain the peak regulating and power limiting power value of each section in the 1 st layer of nested sections;
and substituting the limited power generation capacity and the predicted output of each section in the 2 nd-M layer nested sections into a pre-established second power limiting proportion square sum model, and solving the second power limiting proportion square sum model to obtain the peak-regulating power limiting power value of each section in the 2 nd-M layer nested sections.
4. The method of claim 3, wherein the first power-limited proportional-sum-of-squares model comprises a first objective function and a first constraint;
wherein the first objective function f' is determined as follows:
Figure RE-FDA0002478605380000011
the first constraint condition is as follows:
Figure RE-FDA0002478605380000012
in the above formula, the first and second carbon atoms are,
Figure RE-FDA0002478605380000021
the peak-regulating and electric-limiting power value of the ith section in the 1 st nested section,
Figure RE-FDA0002478605380000022
for the predicted force of the ith section in the layer 1 nested section,
Figure RE-FDA0002478605380000023
the power generation capacity of the ith section in the 1 st layer of nested sections after being limited, y is the peak-load-regulating and power-limiting total power value of the power grid, N1Is the total number of the fracture surfaces in the layer 1 nested fracture surface.
5. The method of claim 4, wherein the peak-to-peak power-limited total power value y for the grid is determined as follows:
Figure RE-FDA0002478605380000024
wherein the content of the first and second substances,
Figure RE-FDA0002478605380000025
the generating capacity N of the ith section in the 1 st layer of nested sections after being limited1The total number of the sections in the 1 st nested section is shown, and b is a new energy receiving space of the power grid.
6. The method of claim 3, wherein the second power-limited proportional-sum-of-squares model comprises a second objective function and a second constraint;
wherein the second objective function f is determined as follows:
Figure RE-FDA0002478605380000026
the second constraint condition is as follows:
Figure RE-FDA0002478605380000027
in the above formula, the first and second carbon atoms are,
Figure RE-FDA0002478605380000028
the peak-regulating and electric-limiting power value of the ith section in the mth layer nested section,
Figure RE-FDA0002478605380000029
for the predicted force of the ith section in the mth layer of nested sections,
Figure RE-FDA00024786053800000210
the power generation capacity of the ith section in the mth layer of nested sections after being limited,
Figure RE-FDA00024786053800000211
is a section set in the mth layer nested section and has a connection relation with the jth section in the (m-1) th layer nested section,
Figure RE-FDA00024786053800000212
the peak-regulating and current-limiting power value of the jth section in the (m-1) th layer nested section is j belongs to [1, N ]m-1]，Nm-1Is the total number of fracture surfaces in the (M-1) th nested fracture surface, and M belongs to [2, M ∈]And M is the total number of the multilayer nested sections.
7. The method of claim 1, wherein obtaining the predicted force for each of the layers of nested sections comprises:
step 1: acquiring the predicted output of each section in the M-th layer of nested sections;
step 2: initializing n-M;
and step 3: determining the predicted output force of the r section in the n-1 layer nested section by using the predicted output force of the section which has a connection relation with the r section in the n-1 layer nested section in the n layer nested section;
and 4, step 4: if n is equal to 1, ending the operation, otherwise, making n equal to n-1 and returning to the step 3;
wherein r is ∈ [1, N ∈ >n-1]，Nn-1Is the total number of fracture surfaces in the n-1 layer nested fracture surface, n belongs to [1, M ]]And M is the total number of the multilayer nested sections.
8. The method of claim 7, wherein step 3, comprises:
the predicted output of the r section in the n-1 layer nested sections is determined according to the following formula
Figure RE-FDA0002478605380000031
Figure RE-FDA0002478605380000032
In the above formula, the first and second carbon atoms are,
Figure RE-FDA0002478605380000033
for the predicted force of the l section in the n-th layer nesting section,
Figure RE-FDA0002478605380000034
is a section set in the N-th layer of nested sections and in the N-1-th layer of nested sections with the connection relation with the r-th section, and r belongs to [1, N ∈n-1]，Nn-1Is the total number of the fracture surfaces in the n-1 layer nested fracture surface.
9. The method of claim 1, wherein the obtaining of the power generation capacity of each of the nested sections after the restriction of each section comprises:
step S1: determining the power generation capacity of each section in the M-th layer of nested sections after being limited by the aid of the predicted output of each section in the M-th layer of nested sections:
step S2: initializing k as M;
step S3: determining the power generation capacity of the k-1 layer of nested fracture surface after the q section is limited by using the power generation capacity of the k layer of nested fracture surface after the fracture surface is limited, wherein the power generation capacity of the k layer of nested fracture surface has a connection relation with the q section of the k-1 layer of nested fracture surface;
step S4: if k is equal to 1, ending the operation, otherwise, making k equal to k-1 and returning to the step 3;
wherein q is ∈ [1, N ∈k-1]，Nk-1Is the total number of fracture surfaces in the k-1 layer nested fracture surface, and k belongs to [1, M ]]And M is the total number of the multilayer nested sections.
10. The method according to claim 9, wherein the step S1 includes:
determining the power generation capacity of the M-th nested section after the p-th section is limited according to the following formula
Figure RE-FDA0002478605380000035
Figure RE-FDA0002478605380000036
Wherein the content of the first and second substances,
Figure RE-FDA0002478605380000037
for the predicted force of the p-th section in the M-th layer nesting section,
Figure RE-FDA0002478605380000038
for the receiving space of the p section in the M layer nesting section, p is the [1, N ]M]，NMThe total number of the fracture surfaces in the M-th layer of nested fracture surfaces is shown, and M is the total number of the multilayer nested fracture surfaces.
11. The method according to claim 9, wherein the step S3 includes:
determining the power generation capacity of the k-1 layer of nested fracture surface after the q fracture surface is limited according to the following formula
Figure RE-FDA0002478605380000041
Figure RE-FDA0002478605380000042
Wherein the content of the first and second substances,
Figure RE-FDA0002478605380000043
the power generation capacity of the kth section in the kth layer of nested sections after being limited,
Figure RE-FDA0002478605380000044
the receiving space of the q section in the k-1 layer nesting section,
Figure RE-FDA0002478605380000045
a section set with a connection relation between the kth section and the qth section in the kth-1 layer nested section is formed, and q belongs to [1, N ∈k-1]，Nk-1Is the total number of fracture surfaces in the k-1 layer nested fracture surface, and k belongs to [1, M ]]And M is the total number of the multilayer nested sections.
12. The method of claim 1, wherein determining the power generation plan for each of the nested sections using the peak shaver limit power values for each of the nested sections comprises:
determining a power generation plan of an h section in an n layer of nested sections according to the following formula
Figure RE-FDA0002478605380000046
Figure RE-FDA0002478605380000047
In the above formula, the first and second carbon atoms are,
Figure RE-FDA0002478605380000048
the power generation capacity of the h section in the n-th layer of nested sections after being limited,
Figure RE-FDA0002478605380000049
the peak-regulating and current-limiting power value of the h section in the N-th layer of nested sections is h belongs to [1, N ]n]，NnIs the total number of fracture surfaces in the n-th layer of nested fracture surfaces, and n belongs to [1, M ]]And M is the total number of the multilayer nested sections.
13. A new energy station power generation planning device, characterized in that the device includes:
the dividing unit is used for dividing the power transmission section into a plurality of layers of nested sections according to the voltage level of the power transmission section;
the first determining unit is used for determining the peak-regulating and power-limiting power value of each section in each layer of nested sections according to the limited power generation capacity of each section in each layer of nested sections and the predicted output of each section in each layer of nested sections;
and the second determining unit is used for determining the power generation plan of each section in each layer of nested sections by using the peak-regulating and power-limiting power value of each section in each layer of nested sections.
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