Water-light power pack complementary scheduling method and system for coupling abandoned power loss

Abstract

The invention relates to a water-light power pack complementary scheduling method and system for coupling electricity abandoning loss, and the method comprises the steps: obtaining a preset water-light delivery capacity threshold value and a water-electricity daily average output set, and obtaining a water-electricity output process set according to a water-electricity typical intraday output process and the water-electricity daily average output set; obtaining a water-light output process set according to the photovoltaic typical intra-day output process and the water-power output process set, and updating the water-power output process set according to the threshold value and the water-light output process set; determining a photovoltaic power abandoning process set according to the updated water-light output process set and a threshold value, and fitting according to the photovoltaic power abandoning process set and the water-light output process set to obtain a photovoltaic power abandoning loss function; constructing a water-light complementary scheduling model according to the photovoltaic output, the hydropower output, the actual photovoltaic output, the output time, the photovoltaic electricity price, the hydropower electricity price and the photovoltaic electricity abandoning loss function; and solving the water-light complementary scheduling model according to a preset constraint condition to obtain photovoltaic output and hydropower output.

Description

Technical Field

[0001] The present application relates to the field of joint dispatching of hydropower and photovoltaic power, and in particular to a method and system for complementary dispatching of hydropower and photovoltaic power groups coupled with power abandonment losses. Background Art

[0002] The basin multi-energy complementary base relies on the basin cascade hydropower to build new energy such as photovoltaics, and uses the hydropower transmission channel to realize the bundling and transmission of clean energy from water and light to form a hydropower power group. Compared with conventional cascade hydropower, when the hydropower power group operates in coordination, the medium-, long- and short-term scheduling methods are quite different from those of conventional cascade hydropower.

[0003] The existing water-photovoltaic complementary systems mostly use months, ten days, and days as scheduling steps in the medium- and long-term and short-term scheduling. After the photovoltaic output is averaged on the scale of months, ten days, and days, the output becomes flattened and cannot accurately reflect the competition between the water and photovoltaic channels.

[0004] The existing technology cannot accurately reflect the power abandonment losses in the hydro-solar power generation group, and thus cannot efficiently realize the hydro-solar complementary scheduling. Summary of the invention

[0005] The embodiments of the present application provide a method and system for complementary scheduling of a hydro-solar power source group coupled with power abandonment losses, so as to at least solve the problem in the related art that power abandonment losses in the hydro-solar power source group cannot be accurately reflected, thereby failing to efficiently realize hydro-solar complementary scheduling.

[0006] In a first aspect, an embodiment of the present application provides a method for complementary scheduling of a hydropower source group coupled with power abandonment loss, including:

[0007] Obtaining a preset hydropower-solar transmission capacity threshold and a hydropower daily average output set, and obtaining a hydropower output process set according to a typical hydropower daily output process and the hydropower daily average output set;

[0008] Obtaining a hydropower-solar output process set according to a typical photovoltaic output process in a day and the hydropower output process set, and updating the hydropower output process set according to the threshold and the hydropower-solar output process set;

[0009] According to the photovoltaic typical day output process and the updated hydropower output process set, an updated hydropower output process set is obtained; according to the updated hydropower output process set and the threshold, a photovoltaic power abandonment process set is determined; and according to the photovoltaic power abandonment process set and the hydropower daily average output set, a photovoltaic power abandonment loss function is obtained by fitting;

[0010] Constructing a hydropower complementary scheduling model based on photovoltaic output, hydropower output, actual photovoltaic output, output time, photovoltaic electricity price, hydropower electricity price and the photovoltaic power abandonment loss function;

[0011] Constraint conditions are constructed, and the water-photovoltaic complementary scheduling model is solved according to the constraint conditions to obtain photovoltaic output and hydropower output.

[0012] In one embodiment, updating the hydropower output process set according to the threshold and the hydropower output process set includes:

[0013] updating the hydropower output process within a first target time period according to the threshold value and the hydropower output process, and determining the hydropower difference value that needs to be increased within the first target time period, wherein the first target time period is a time period during which the hydropower output during the hydropower output process is less than the threshold value;

[0014] The hydropower output process within a second target time period is updated according to the hydropower difference, and the second target time period is a time period in which the hydropower output is greater than the threshold.

[0015] In one embodiment, updating the hydropower output process in the first target time period according to the threshold value and the hydropower output process, and determining the hydropower difference value that needs to be increased in the first target time period, includes:

[0016] The hydropower output process within the first target time period is updated according to the target process, and the difference between the target value of the target process within the first target time period and the hydropower output before the update is calculated. The target process is the first difference process between the threshold value within the first target time period and the hydropower output process.

[0017] In one embodiment, the process of updating the hydropower output in the second target time period according to the hydropower difference includes:

[0018] An average of the difference within the second target time period is calculated, and the hydropower output process within the second target time period is updated according to a second difference process between the hydropower output within the second target time period and the average.

[0019] In one embodiment, the hydropower output process set is obtained according to the hydropower typical daily output process and the hydropower daily average output set, including:

[0020] According to the hydropower typical day output process, an average value of the hydropower typical day output process is obtained;

[0021] Calculate a scaling ratio set of the hydropower typical day output according to the hydropower daily average output set and the hydropower typical day output process average value;

[0022] The typical hydropower daily output process is scaled according to the scaling ratio set to obtain a hydropower output process set.

[0023] In one embodiment, determining a photovoltaic power abandonment process set according to the updated hydropower output process set and the threshold, and fitting a photovoltaic power abandonment loss function according to the photovoltaic power abandonment process set and the hydropower output process set include:

[0024] The portion of the hydro-solar output that is greater than the threshold during the updating process is regarded as a photovoltaic power abandonment process;

[0025] All photovoltaic power abandonment processes in the updated hydropower output process set are calculated, and a photovoltaic power abandonment loss function is constructed according to the photovoltaic power abandonment processes and the corresponding average daily hydropower output.

[0026] In one embodiment, the hydropower complementary scheduling model is constructed according to the photovoltaic output, hydropower output, actual photovoltaic output, output time, photovoltaic electricity price, hydropower electricity price and photovoltaic power abandonment loss function, including:

[0027]

[0028] Among them, F is the power generation efficiency, I is the number of transmission channels, T is the maximum time, i represents the i-th transmission channel, t represents the t period, N PV,t,i represents the photovoltaic output of the i-th transmission channel during period t, N H,t,i represents the hydropower output of the ith transmission channel during period t, represents the actual photovoltaic output of the i-th transmission channel, r H,i is the hydropower price of the i-th transmission channel, r PV,i is the photovoltaic power price of the i-th transmission channel, f loss,i (*) is the photovoltaic power curtailment loss function of the i-th transmission channel, and Δt represents the time period.

[0029] In one embodiment, the construction constraint conditions include:

[0030] According to the maximum power and minimum power that the photovoltaic power station can output, the photovoltaic output power constraint is established;

[0031] The water-solar transmission capacity constraint is established based on the water-solar transmission capacity threshold, photovoltaic output power, and hydropower output power;

[0032] Construct water balance constraints based on the initial storage capacity, final storage capacity, inflow, outflow, evaporation loss and duration of the power station during the target period;

[0033] Constructing the reservoir water level constraint based on the upper and lower limits of the upstream water level of the power station during the target period;

[0034] Construct the reservoir discharge flow constraint according to the upper and lower limits of the total discharge flow of the power station in the target period;

[0035] Construct hydropower output power constraints based on the upper and lower limits of the power station's power output at the target time;

[0036] Construct the reservoir water level constraint at the end of the dispatching period according to the reservoir water level at the end of the dispatching period;

[0037] The climbing constraint is established according to the hydropower output at the target moment and the hydropower output at the moment before the target moment.

[0038] In a second aspect, an embodiment of the present application provides a complementary scheduling system for a hydro-photovoltaic power source group coupled with power abandonment loss, including:

[0039] Hydropower output module: used to obtain the preset hydropower and solar power transmission capacity threshold and the hydropower daily average output set, and obtain the hydropower output process set according to the hydropower typical daily output process and the hydropower daily average output set;

[0040] A hydropower update module: used for obtaining a hydropower output process set according to a typical photovoltaic output process in a day and the hydropower output process set, and updating the hydropower output process set according to the threshold and the hydropower output process set;

[0041] Photovoltaic power abandonment module: used to obtain an updated hydropower output process set according to the photovoltaic typical day output process and the updated hydropower output process set, determine the photovoltaic power abandonment process set according to the updated hydropower output process set and the threshold, and obtain the photovoltaic power abandonment loss function according to the photovoltaic power abandonment process set and the hydropower output process set;

[0042] Model building module: used to build a hydropower-photovoltaic complementary scheduling model based on photovoltaic output, hydropower output, actual photovoltaic output, output time, photovoltaic electricity price, hydropower electricity price and photovoltaic power abandonment loss function;

[0043] Iteration module: used to construct constraint conditions, and iteratively solve the water-photovoltaic complementary scheduling model according to the constraint conditions to obtain photovoltaic output and hydropower output.

[0044] In a third aspect, an embodiment of the present application provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the method for complementary scheduling of hydro-photovoltaic power source groups with coupled power abandonment losses as described in the first aspect above is implemented.

[0045] The embodiments of the present application provide a method and system for complementary scheduling of hydro-photovoltaic power generation groups coupled with power abandonment losses, which have at least the following technical effects.

[0046] This application uses hydropower and photovoltaic power groups as scheduling objects, analyzes the relationship between typical hydropower output and typical photovoltaic output, and uses the complementary regulatory effect of hydropower on photovoltaics to reduce photovoltaic power abandonment. It also establishes the relationship between hydropower output and photovoltaic power abandonment, extracts photovoltaic power abandonment loss functions, and quantifies power abandonment of hydropower and photovoltaic power groups in medium- and long-term and short-term models. The power abandonment loss function is integrated into the hydropower and photovoltaic complementary scheduling model to solve the problem that medium- and long-term and short-term power abandonment cannot be quantified, and to achieve medium- and long-term complementary scheduling of hydropower and photovoltaic power groups.

[0047] Details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0049] Figure 1 This is a flow chart of a complementary scheduling method for a hydro-photovoltaic power source group coupled with power abandonment loss provided in an embodiment of the present application;

[0050] Figure 2 is a schematic diagram showing a typical daily output process of hydropower during flood season and non-flood season according to an exemplary embodiment;

[0051] Figure 3 is a schematic diagram showing a typical hydropower output process scaling during the flood season and the non-flood season according to an exemplary embodiment;

[0052] Figure 4 is a schematic diagram of water-light complementary regulation in flood season according to an exemplary embodiment;

[0053] Figure 5 is a schematic diagram showing complementary regulation of a hydro-photovoltaic power supply group during flood season according to an exemplary embodiment;

[0054] Figure 6 is a flow chart of performing model solving using a differential evolution algorithm according to an exemplary embodiment;

[0055] Figure 7 It is a structural schematic diagram of a water-solar power source group complementary scheduling system coupled with power abandonment loss according to an embodiment of the present application;

[0056] Figure 8 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. Based on the embodiments provided in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0058] Obviously, the drawings described below are only some examples or embodiments of the present application. For ordinary technicians in this field, the present application can also be applied to other similar scenarios based on these drawings without creative work. In addition, it can also be understood that although the efforts made in this development process may be complicated and lengthy, for ordinary technicians in this field related to the content disclosed in this application, some changes in design, manufacturing or production based on the technical content disclosed in this application are just conventional technical means, and should not be understood as insufficient content disclosed in this application.

[0059] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those of ordinary skill in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0060] Unless otherwise defined, the technical terms or scientific terms involved in this application should be understood by people with ordinary skills in the technical field to which this application belongs. The words "one", "a", "a", "the" and the like involved in this application do not indicate a quantitative limitation, and may represent the singular or plural. The terms "include", "comprise", "have" and any of their variations involved in this application are intended to cover non-exclusive inclusions; for example, a process, method, system, product or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units that are not listed, or may also include other steps or units inherent to these processes, methods, products or devices. The words "connect", "connected", "coupled" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The "multiple" involved in this application refers to two or more. "And / or" describes the association relationship of associated objects, indicating that there may be three relationships, for example, "A and / or B" can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects before and after are in an "or" relationship. The terms "first", "second", "third", etc. involved in this application are only used to distinguish similar objects and do not represent a specific ordering of the objects.

[0061] In a first aspect, an embodiment of the present application provides a method for complementary scheduling of a hydropower source group coupled with power abandonment loss. Figure 1 : is a flow chart of a method for complementary scheduling of a hydro-photovoltaic power source group coupled with power abandonment loss provided in an embodiment of the present application, such as Figure 1 As shown, the method includes:

[0062] Step S101, obtaining a preset hydro-solar transmission capacity threshold and a hydropower daily average output set, and obtaining a hydropower output process set according to a hydropower typical day output process and a hydropower daily average output set.

[0063] Optionally, the water-light delivery capacity threshold can be expressed as TCC t,i :

[0064] N H，t，i +N PV，t，i ≤TCC t，i

[0065] Among them, N PV,t,i represents the photovoltaic output of the i-th transmission channel during period t, N H,t,i represents the hydropower output of the ith transmission channel in period t, TCC t,i Represents the capacity limit of the i-th outbound channel in period t.

[0066] Optionally, according to the installed capacity of the hydropower station, different daily average output values ​​of hydropower are set according to the preset step size, and the different daily average output values ​​of hydropower constitute the daily average output set of hydropower, which can be specifically expressed as {N H,1 , N H,2 , ..., N H,N}. The step size and the number of elements N in the set can be set according to the actual application scenario and specific needs.

[0067] In one example, step S101 includes:

[0068] Step S1011, obtaining an average value of the hydropower output process in a typical day according to the hydropower output process in a typical day.

[0069] Optionally, considering that the hydropower output process in typical days during the flood season and the non-flood season is different, the hydropower output during the flood season and the non-flood season are calculated respectively, but the specific calculation steps during the flood season and the non-flood season are the same, and only the parameter values ​​involved are different. Figure 2 This is a schematic diagram of the typical daily output process of hydropower in the flood season and non-flood season according to an exemplary embodiment. H,fs (*) Typical daily output process of hydropower in non-flood season N H,nfs (*). This is used to calculate the average daily output of hydropower in the flood season and non-flood season.

[0070]

[0071] in, is the average value of hydropower output in a typical day during the flood season, It is the average value of hydropower output in a typical day during the non-flood season.

[0072] Step S1012, calculating a scaling ratio set of the hydropower typical day output according to the hydropower daily average output set and the hydropower typical day output process average value.

[0073] Optionally, the scaling ratio set of the hydropower typical day output is determined according to the ratio of the hydropower daily average output in the hydropower daily average output set to the average value of the hydropower typical day output process, which can be specifically expressed as:

[0074]

[0075] Among them, δ 1，fs ~δ n，fs is the set of scaling ratios of typical daily hydropower output during the flood season, δ 1，nfs ~δ n，nfs It is a collection of scaling ratios of typical daily hydropower output during the non-flood season.

[0076] Step S1013, scaling the hydropower typical day output process according to the scaling ratio set to obtain a hydropower output process set.

[0077] Optionally, Figure 3 is a schematic diagram showing a typical hydropower output process scaling during the flood season and the non-flood season according to an exemplary embodiment. Figure 3 As shown in the figure, the hydropower output process set can be divided into the flood season hydropower output process set and the non-flood season hydropower output process set. The flood season hydropower output process set can be expressed as {δ 1,fs N H,fs (*), δ 2,fs N H,fs (*), ..., δ n,fs N H,fs (*)}; The set of hydropower output processes in the non-flood season can be expressed as {δ 1,nfs N H,fs (*), δ 2,nfs N H,fs (*), ..., δ n,nfs N H,fs (*)}.

[0078] Continue to refer to Figure 1 , after step S101, step S102 is performed, as follows.

[0079] Step S102, obtaining a hydropower-solar output process set according to a typical photovoltaic output process in a day and a hydropower output process set, and updating the hydropower output process set according to a threshold value and the hydropower-solar output process set.

[0080] Optionally, the photovoltaic typical day output process is superimposed with the hydropower output process to obtain the hydropower output process, and all the hydropower output processes constitute the hydropower output process set. PV,fs (*) or the typical daily output process of photovoltaic power generation during the non-flood season N PV,nfs (*). Then the set of hydro-photovoltaic output processes during the flood season can be expressed as: {δ 1,fs N H,fs (*)+N PV,fs (*), δ 2,fs N H,fs (*)+N PV,fs (*), ..., δ n,fs N H,fs (*)+N PV,fs (*)}; The set of hydro-solar output processes in the non-flood season can be expressed as: {δ 1,nfs N H,fs (*)+N PV,nfs (*), δ 2,nfs N H,fs (*)+NPV,nfs (*), ..., δ n,nfs N H,fs (*)+N PV,nfs (*)}. Taking the superposition of hydropower and photovoltaic power generation during the flood season as an example, Figure 4 The diagram is a schematic diagram before water-light complementary regulation during the flood season according to an exemplary embodiment.

[0081] In one example, step S102 includes:

[0082] Step S201, update the hydropower output process within the first target time period according to the threshold and the hydropower output process, and determine the hydropower difference that needs to be increased within the first target time period. The first target time period is the time period when the hydropower output is less than the threshold during the hydropower output process.

[0083] Optionally, refer to Figure 4 , the first target time period that does not reach the water-light delivery capacity threshold is represented as [t0, t n ] and [t m , t 24 ], increase the hydropower output or hydropower output in the first target time period to the hydropower-solar transmission capacity threshold. Among them, when the hydropower-solar output is increased to the hydropower-solar transmission capacity threshold, the photovoltaic output value remains unchanged, and the hydropower output value is increased to the difference between the hydropower-solar transmission capacity threshold and the photovoltaic output. At this time, the capacity difference value that needs to be increased in the first time period is the sum of the difference between the transmission capacity threshold in the first time period and the hydropower-solar output. When the hydropower output is increased to the hydropower-solar transmission capacity threshold, the hydropower difference value that needs to be increased in the first time period is the sum of the difference between the transmission capacity threshold in the first time period and the hydropower output.

[0084] In one example, step S201 includes: updating the hydropower output process within the first target time period according to the target process, and calculating the difference between the target value of the target process within the first target time period and the hydropower output before the update, the target process being the first difference process between the threshold value within the first target time period and the hydropower output process.

[0085] Optionally, the hydropower output in the first target time period is increased to the hydropower output threshold, where the photovoltaic output remains unchanged. The hydropower output increase value at each moment in the first target time period is the difference between the output threshold and the hydropower output at each moment. At the same time, the total increase in hydropower output in the first target time period is calculated. Taking the flood season as an example, the difference can be specifically expressed as:

[0086]

[0087] Among them, W H,fs,raise is the total increase in hydropower output during the first target time period, [t0, t n ] and [t m , t24 ] is the first target time period where the water-light delivery capacity threshold is not reached, TCC t,i is the water-light delivery capacity threshold, δ n,fs N H,fs (t)+N PV,fs (t) is the water-solar output during period t.

[0088] Step S202, updating the hydropower output process in the second target time period according to the hydropower difference, the second target time period being the time period when the hydropower output is greater than the threshold.

[0089] Optionally, hydropower plays a complementary regulatory role in the hydro-solar power source group, increasing the hydropower output when the hydro-solar output does not reach the external transmission capacity threshold; reducing the hydropower output when the hydro-solar output is greater than the external transmission capacity threshold. In order to ensure that the total hydropower generation after complementation is consistent with the original hydropower output, it is necessary to reduce the hydropower output accordingly in the second target time period, and the reduced hydropower output is consistent with the increased hydropower output in the first target time period.

[0090] In one example, the process of updating the hydropower output within the second target time period based on the hydropower difference includes: calculating the average of the difference within the second target time period, and updating the hydropower output process within the second target time period based on the second difference process between the hydropower output within the second target time period and the average.

[0091] Optionally, according to the average value of the total amount of hydropower boost in the first time period in the second target time period, the hydropower output in the second target time period is updated to the difference between the hydropower output in the corresponding time period and the average value. Figure 5 is a schematic diagram showing complementary regulation of hydro-photovoltaic power supply groups during flood season according to an exemplary embodiment. Figure 5 As shown, the splicing splicing [t0, t n ]、[t n , t m ]、[t m , t 24 ] period, and the new hydropower output process after complementation.

[0092] In this way, the relationship between hydropower output and typical photovoltaic output is analyzed through step S102, and the complementary regulatory effect of hydropower on photovoltaic power is fully utilized to reduce photovoltaic power abandonment and improve the medium- and long-term complementary scheduling effect of hydropower and photovoltaic power groups.

[0093] Continue to refer to Figure 1 , after step S102, step S103 is performed, as follows.

[0094] Step S103, obtaining an updated hydro-solar output process set based on the typical daily photovoltaic output process and the updated hydropower output process set, determining a photovoltaic power abandonment process set based on the updated hydro-solar output process set and a threshold, and obtaining a photovoltaic power abandonment loss function based on the photovoltaic power abandonment process set and the hydropower daily average output set.

[0095] Optionally, the part that still exceeds the water-solar transmission capacity threshold is regarded as the photovoltaic power abandonment process, and the water-solar output set {δ 1,fs N H,fs (*)+N PV,fs (*), δ 2,fs N H,fs (*)+N PV,fs (*), ..., δ n,fs N H,fs (*)+N PV,fs (*)}, and construct a photovoltaic power abandonment loss function based on the proportion of photovoltaic power abandonment process to hydropower output process. In this way, the relationship between hydropower output and photovoltaic power abandonment is established, and the photovoltaic power abandonment loss function is extracted to quantify the power abandonment of hydropower and photovoltaic power generation groups in the medium- and long-term and short-term models. This accurately reflects the power abandonment loss in the hydropower and photovoltaic power generation groups, which is convenient for the subsequent efficient realization of hydropower and photovoltaic complementary scheduling.

[0096] In one example, step S103 includes:

[0097] Step S301, the part of the process of updating the hydropower output that is greater than the threshold is regarded as the photovoltaic power abandonment process.

[0098] Step S302, calculate and update all photovoltaic power abandonment processes in the hydropower output process set, and construct a photovoltaic power abandonment loss function according to the photovoltaic power abandonment process and the corresponding average daily hydropower output.

[0099] Alternatively, the photovoltaic power curtailment loss function can be expressed as:

[0100]

[0101] Among them, N q,PV,fs (t) represents the photovoltaic power loss during period t, N H,fs (t) is the average daily output of hydropower in period t, f loss,fs (*) is the photovoltaic power abandonment loss function during the flood season.

[0102] In addition, it should be noted that the calculation method of the photovoltaic power abandonment loss function in the non-flood season is the same as that in the flood season. The only difference is that the hydropower output value during the typical daily output of hydropower in the non-flood season is different from that in the flood season.

[0103] Step S104, constructing a hydropower-photovoltaic complementary scheduling model according to photovoltaic output, hydropower output, actual photovoltaic output, output time, photovoltaic electricity price, hydropower electricity price and photovoltaic power abandonment loss function.

[0104] Optionally, based on the maximum power generation benefit goal of the hydro-photovoltaic complementary system, the photovoltaic power abandonment loss function is nested to construct a hydro-photovoltaic complementary optimization scheduling model coupled with the power abandonment loss function. In order to consider the power abandonment loss more finely in the long-term and short-term scheduling models, the relationship between the hydropower output of the hydro-photovoltaic power generation group and the photovoltaic power abandonment rate is quantitatively characterized, thereby effectively reducing photovoltaic power abandonment.

[0105] In one example, constructing the water-solar complementary scheduling model in step S104 specifically includes:

[0106]

[0107] Among them, F is the power generation efficiency, I is the number of transmission channels, T is the maximum time, i represents the i-th transmission channel, t represents the t period, N PV,t,i represents the photovoltaic output of the i-th transmission channel during period t, N H,t,i represents the hydropower output of the ith transmission channel during period t, represents the actual photovoltaic output of the i-th transmission channel, r H,i is the hydropower price of the i-th transmission channel, r PV,i is the photovoltaic power price of the i-th transmission channel, f loss,i (*) is the photovoltaic power curtailment loss function of the i-th transmission channel, and Δt represents the time period.

[0108] Step S105, constructing constraint conditions, and iteratively solving the water-photovoltaic complementary scheduling model according to the constraint conditions to obtain photovoltaic output and hydropower output.

[0109] Optionally, constraints such as photovoltaic output power constraints, hydro-solar transmission capacity constraints, water balance constraints, reservoir water level constraints, reservoir discharge flow constraints, hydropower output power constraints, reservoir water level constraints at the end of the dispatch period, and hydropower output ramp constraints are constructed. In this way, constraints such as power and water level are set during hydropower and photovoltaic power generation to ensure safety and efficiency during power generation.

[0110] Optionally, on the basis of initializing the boundary conditions of the cascade hydropower and photovoltaic power stations in the basin, the water-photovoltaic complementary scheduling model is solved according to the constraint conditions, and the differential evolution algorithm is selected for iterative solution. Figure 6 The figure is a flow chart of solving a model using a differential evolution algorithm according to an exemplary embodiment.

[0111] In one example, the constraint conditions are constructed in step S105, including:

[0112] (1) According to the maximum power and minimum power that the photovoltaic power station can output, a photovoltaic output power constraint is constructed. Optionally, the photovoltaic output power constraint is specifically expressed as:

[0113]

[0114] Among them, N PV,t,i The rate is the output power of the photovoltaic power station in the i-th hydro-photovoltaic power group in the t-th period, is the minimum power that the photovoltaic power station in the system can output. It is the maximum power that the photovoltaic power station in the system can output.

[0115] (2) The water-solar transmission capacity constraint is established according to the water-solar transmission capacity threshold, photovoltaic output power, and hydropower output power. Optionally, the water-solar transmission capacity threshold can be specifically expressed as:

[0116] N H，t，i +N PV，t，i ≤TCC t，i

[0117] Among them, N PV,t,i represents the photovoltaic output of the i-th transmission channel during period t, N H,t,i represents the hydropower output of the ith transmission channel in period t, TCC t,i Represents the capacity limit of the i-th outbound channel in period t.

[0118] (3) Construct a water balance constraint based on the initial storage capacity, final storage capacity, inflow, outflow, evaporation loss and duration of the power station during the target period. Optionally, the water balance constraint can be specifically expressed as:

[0119] V i,t+1 =V i,t +(I i，t -Q i，t -Ev i，t )·Δt

[0120] Among them, V i,t represents the initial storage capacity of the ith power station in the tth period, V i,tt+1 represents the storage capacity of the i-th power station at the end of the t-th period, Q i,t represents the outflow of the i-th power station in the t-th period, Ev i,t represents the evaporation loss of the i-th power station in the t-th time period, and Δt represents the duration of the time period.

[0121] (4) Construct a reservoir water level constraint based on the upper and lower limits of the upstream water level of the power station during the target period. Optionally, the reservoir water level constraint can be specifically expressed as:

[0122]

[0123] Among them, Z u,i,t represents the upstream water level of the ith power station in the tth period, represents the upper limit of the upstream water level of the ith power station in the tth period, It represents the lower limit of the upstream water level of the ith power station in the tth period.

[0124] (5) Construct the reservoir discharge flow constraint according to the upper and lower limits of the total discharge flow of the power station in the target period. Optionally, the reservoir discharge flow constraint can be specifically expressed as:

[0125]

[0126] Among them, Q i ,t represents the total discharge flow of the i-th power station in the t-th period, which is composed of the power generation flow and the abandoned water flow. represents the upper limit of the total discharge flow of the ith power station in the tth period, It represents the lower limit of the total discharge flow of the i-th power station in the t-th time period.

[0127] (6) Construct a hydropower output power constraint based on the upper and lower limits of the power generation output of the power station at the target time. Optionally, the hydropower output power constraint can be specifically expressed as:

[0128]

[0129] Among them, N h,i,t represents the power output of the i-th power station in the t-th period, represents the upper limit of power generation output of the i-th power station in the t-th period, It represents the lower limit of power output of the i-th power station in the t-th time period.

[0130] (7) Construct the reservoir water level constraint at the end of the scheduling period according to the reservoir water level at the end of the scheduling period. Optionally, the reservoir water level constraint at the end of the scheduling period can be specifically expressed as:

[0131]

[0132] Among them, Z i,t represents the reservoir water level of the i-th power station in the t-th period, Represents the preset reservoir water level of the i-th power station at the end of the scheduling period.

[0133] (8) A climbing constraint is constructed based on the hydropower generation at the target time and the hydropower generation at the previous time before the target time. Optionally, the climbing constraint can be specifically expressed as:

[0134]

[0135] Among them, NH,i,t Indicates the hydropower output at the target time, N H,i,t-1 Indicates the hydropower output at the previous moment of the target moment. Indicates the climbing constraint threshold.

[0136] In summary, the present application provides a complementary scheduling method for a hydro-photovoltaic power generation group coupled with power abandonment losses. The hydro-photovoltaic power generation group is used as the scheduling object, and the relationship between the typical hydropower output and the typical photovoltaic output during the flood season and non-flood season is analyzed, and the complementary regulatory effect of hydropower on photovoltaics is used to reduce photovoltaic power abandonment. The relationship between hydropower output and photovoltaic power abandonment is established, and the photovoltaic power abandonment loss function is extracted to quantify the power abandonment of the hydro-photovoltaic power generation group in the medium- and long-term and short-term models. The power abandonment loss function is integrated into the hydro-photovoltaic complementary scheduling model to solve the problem that medium- and long-term and short-term power abandonment cannot be quantified, and the medium- and long-term complementary scheduling of the hydro-photovoltaic power generation group is realized with the goal of maximizing power generation revenue.

[0137] In a second aspect, an embodiment of the present application provides a complementary scheduling system for a hydro-photovoltaic power source group coupled with power abandonment loss, Figure 7 is a structural schematic diagram of a complementary scheduling system for a hydro-photovoltaic power source group coupled with power abandonment loss according to an embodiment of the present application, such as Figure 7 As shown, the system includes:

[0138] The hydropower output module 100 is used to obtain a preset hydropower-solar power transmission capacity threshold and a hydropower daily average output set, and obtain a hydropower output process set according to a typical hydropower daily output process and a hydropower daily average output set.

[0139] The hydropower update module 200 is used to obtain a hydropower-solar output process set according to a typical photovoltaic output process in a day and a hydropower output process set, and to update the hydropower output process set according to a threshold value and the hydropower output process set.

[0140] Photovoltaic power abandonment module 300: used to obtain an updated hydropower-solar output process set based on the typical photovoltaic daily output process and the updated hydropower output process set, determine the photovoltaic power abandonment process set based on the updated hydropower-solar output process set and the threshold, and obtain the photovoltaic power abandonment loss function by fitting the photovoltaic power abandonment process set and the hydropower daily average output set.

[0141] Model building module 400: used to build a hydropower complementary scheduling model based on photovoltaic output, hydropower output, actual photovoltaic output, output time, photovoltaic electricity price, hydropower electricity price and photovoltaic power abandonment loss function.

[0142] Iteration module 500: is used to construct constraint conditions, and iteratively solve the water-photovoltaic complementary scheduling model according to the constraint conditions to obtain photovoltaic output and hydropower output.

[0143] In one example, the hydropower renewal module 200 includes:

[0144] Used to update the hydropower output process within the first target time period according to the threshold and the hydropower output process, and determine the hydropower difference that needs to be increased within the first target time period. The first target time period is the time period when the hydropower output is less than the threshold during the hydropower output process.

[0145] The hydropower output process in the second target time period is updated according to the hydropower difference, and the second target time period is a time period when the hydropower output is greater than the threshold.

[0146] In one example, the hydropower update module 200 includes: a process for updating the hydropower output process within the first target time period according to the target process, and calculating the difference between the target value of the target process within the first target time period and the hydropower output before the update, wherein the target process is the first difference process between the threshold value within the first target time period and the hydropower output process.

[0147] In one example, the hydropower update module 200 includes: a module for calculating an average of the difference within the second target time period, and updating the hydropower output process within the second target time period according to the second difference process between the hydropower output within the second target time period and the average.

[0148] In one example, the hydropower output module 100 includes:

[0149] Used to obtain the average value of the hydropower typical daily output process based on the hydropower typical daily output process.

[0150] It is used to calculate the scaling ratio set of hydropower typical daily output based on the hydropower daily average output set and the hydropower typical daily output process average value.

[0151] It is used to scale the typical daily hydropower output process according to the scaling ratio set to obtain a hydropower output process set.

[0152] In one example, the photovoltaic power abandonment module 300 includes:

[0153] It is used to treat the part of the hydro-solar power output that is greater than the threshold during the update process as the photovoltaic power abandonment process.

[0154] It is used to calculate and update all photovoltaic power abandonment processes in the set of hydropower output processes, and to construct a photovoltaic power abandonment loss function based on the photovoltaic power abandonment processes and the corresponding average daily hydropower output.

[0155] In one example, the model building module 400 includes:

[0156]

[0157] Among them, F is the power generation efficiency, I is the number of transmission channels, T is the maximum time, i represents the i-th transmission channel, t represents the t period, N PV,t,irepresents the photovoltaic output of the i-th transmission channel during period t, N H,t,i represents the hydropower output of the ith transmission channel during period t, represents the actual photovoltaic output of the i-th transmission channel, r H,i is the hydropower price of the i-th transmission channel, r PV,i is the photovoltaic power price of the i-th transmission channel, f loss,i (*) is the photovoltaic power curtailment loss function of the i-th transmission channel, and Δt represents the time period.

[0158] In one example, the iteration module 500 includes:

[0159] It is used to construct photovoltaic output power constraints based on the maximum power and minimum power that the photovoltaic power station can output.

[0160] It is used to construct the hydro-solar transmission capacity constraint according to the hydro-solar transmission capacity threshold, photovoltaic output power and hydropower output power.

[0161] It is used to construct water balance constraints based on the initial storage capacity, final storage capacity, inflow, outflow, evaporation loss and duration of the power station in the target period.

[0162] Used to construct reservoir water level constraints based on upper and lower limits of the upstream water level of the power station during the target time period.

[0163] It is used to construct the reservoir discharge flow constraint according to the upper and lower limits of the total discharge flow of the power station in the target period.

[0164] It is used to construct the hydropower output power constraint according to the upper and lower limits of the power generation output of the power station at the target time.

[0165] Used to construct the reservoir water level constraint at the end of the scheduling period based on the reservoir water level at the end of the scheduling period.

[0166] It is used to construct a climbing constraint according to the hydropower generation at the target moment and the hydropower generation at the moment before the target moment.

[0167] In summary, the present application provides a complementary scheduling system for hydropower and photovoltaic power generation groups coupled with power abandonment losses. The system takes the hydropower and photovoltaic power generation groups as the scheduling objects, analyzes the relationship between the typical output of hydropower and the typical output of photovoltaic power generation during the flood season and non-flood season, and uses the complementary regulatory effect of hydropower on photovoltaic power generation to reduce photovoltaic power abandonment. The relationship between hydropower output and photovoltaic power abandonment is established, and the photovoltaic power abandonment loss function is extracted to quantify the power abandonment of the hydropower and photovoltaic power generation groups in the medium- and long-term and short-term models. The power abandonment loss function is integrated into the hydropower and photovoltaic complementary scheduling model to solve the problem that medium- and long-term and short-term power abandonment cannot be quantified, and the medium- and long-term complementary scheduling of the hydropower and photovoltaic power generation groups is achieved with the goal of maximizing power generation revenue.

[0168] In a third aspect, an embodiment of the present application provides an electronic device, Figure 8 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. The electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the method for complementary scheduling of a hydro-photovoltaic power source group coupled with power abandonment loss provided in the first aspect is implemented. Figure 8 The electronic device 60 shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0169] The electronic device 60 may be in the form of a general-purpose computing device, for example, it may be a server device. The components of the electronic device 60 may include but are not limited to: at least one processor 61, at least one memory 62, and a bus 63 connecting different system components (including the memory 62 and the processor 61).

[0170] The bus 63 includes a data bus, an address bus, and a control bus.

[0171] The memory 62 may include a volatile memory, such as a random access memory (RAM) 621 and / or a cache memory 622 , and may further include a read-only memory (ROM) 623 .

[0172] The memory 62 may also include a program / utility 625 having a set (at least one) of program modules 624, such program modules 624 including but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment.

[0173] The processor 61 executes various functional applications and data processing by running the computer program stored in the memory 62, such as the complementary scheduling method of the hydro-photovoltaic power source group coupled with power abandonment loss provided in the first aspect of the present application.

[0174] The electronic device 60 may also communicate with one or more external devices 64 (e.g., keyboards, pointing devices, etc.). Such communication may be performed via an input / output (I / O) interface 65. Furthermore, the model-generated device 60 may also communicate with one or more networks (e.g., a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet) via a network adapter 66. As shown, the network adapter 66 communicates with other modules of the model-generated device 60 via a bus 63. It should be understood that, although not shown in the figure, other hardware and / or software modules may be used in conjunction with the model-generated device 60, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID (RAID) systems, tape drives, and data backup storage systems.

[0175] It should be noted that although several units / modules or sub-units / modules of the electronic device are mentioned in the above detailed description, this division is merely exemplary and not mandatory. In fact, according to an embodiment of the present invention, the features and functions of two or more units / modules described above can be embodied in one unit / module. Conversely, the features and functions of one unit / module described above can be further divided into multiple units / modules to be embodied.

[0176] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0177] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A method for complementary scheduling of hydropower and photovoltaic power generation groups coupled with power abandonment losses, characterized in that: include: Obtaining a preset hydropower-solar transmission capacity threshold and a hydropower daily average output set, and obtaining a hydropower output process set according to a typical hydropower daily output process and the hydropower daily average output set; Obtaining a hydropower-solar output process set according to a typical photovoltaic output process in a day and the hydropower output process set, and updating the hydropower output process set according to the threshold and the hydropower-solar output process set; According to the photovoltaic typical day output process and the updated hydropower output process set, an updated hydropower output process set is obtained; according to the updated hydropower output process set and the threshold, a photovoltaic power abandonment process set is determined; and according to the photovoltaic power abandonment process set and the hydropower daily average output set, a photovoltaic power abandonment loss function is obtained by fitting; Constructing a hydropower complementary scheduling model based on photovoltaic output, hydropower output, actual photovoltaic output, output time, photovoltaic electricity price, hydropower electricity price and the photovoltaic power abandonment loss function; Constraint conditions are constructed, and the water-photovoltaic complementary scheduling model is iteratively solved according to the constraint conditions to obtain photovoltaic output and hydropower output.

2. The method for complementary scheduling of hydropower and photovoltaic power generation groups with coupled power abandonment loss according to claim 1 is characterized in that: The updating of the hydropower output process set according to the threshold and the hydropower output process set includes: updating the hydropower output process within a first target time period according to the threshold value and the hydropower output process, and determining the hydropower difference value that needs to be increased within the first target time period, wherein the first target time period is a time period during which the hydropower output during the hydropower output process is less than the threshold value; The hydropower output process within a second target time period is updated according to the hydropower difference, and the second target time period is a time period in which the hydropower output is greater than the threshold.

3. The method for complementary scheduling of hydropower and photovoltaic power generation groups with coupled power abandonment loss according to claim 2 is characterized in that: The updating of the hydropower output process in the first target time period according to the threshold value and the hydropower output process, and determining the hydropower difference value that needs to be increased in the first target time period, includes: The hydropower output process within the first target time period is updated according to the target process, and the difference between the target value of the target process within the first target time period and the hydropower output before the update is calculated. The target process is the first difference process between the threshold value within the first target time period and the hydropower output process.

4. The method for complementary scheduling of hydropower and photovoltaic power generation groups with coupled power abandonment losses according to claim 2 is characterized in that: The process of updating the hydropower output in the second target time period according to the hydropower difference includes: An average of the difference within the second target time period is calculated, and the hydropower output process within the second target time period is updated according to a second difference process between the hydropower output within the second target time period and the average.

5. The method for complementary scheduling of hydropower and photovoltaic power generation groups with coupled power abandonment loss according to claim 1 is characterized in that: The hydropower output process set is obtained according to the hydropower typical daily output process and the hydropower daily average output set, including: According to the hydropower typical day output process, an average value of the hydropower typical day output process is obtained; Calculate a scaling ratio set of the hydropower typical day output according to the hydropower daily average output set and the hydropower typical day output process average value; The typical hydropower daily output process is scaled according to the scaling ratio set to obtain a hydropower output process set.

6. The method for complementary scheduling of hydropower and photovoltaic power generation groups with coupled power abandonment losses according to claim 1 is characterized in that: The step of determining a photovoltaic power abandonment process set according to the updated hydropower and photovoltaic output process set and the threshold, and fitting a photovoltaic power abandonment loss function according to the photovoltaic power abandonment process set and the hydropower output process set, comprises: The portion of the hydro-solar output that is greater than the threshold during the updating process is regarded as a photovoltaic power abandonment process; All photovoltaic power abandonment processes in the updated hydropower output process set are calculated, and a photovoltaic power abandonment loss function is constructed according to the photovoltaic power abandonment processes and the corresponding average daily hydropower output.

7. The method for complementary scheduling of hydropower and photovoltaic power generation groups with coupled power abandonment losses according to claim 1 is characterized in that: The hydropower complementary scheduling model is constructed according to the photovoltaic output, hydropower output, actual photovoltaic output, output time, photovoltaic electricity price, hydropower electricity price and photovoltaic power abandonment loss function, including: Among them, F is the power generation efficiency, I is the number of transmission channels, T is the maximum time, i represents the i-th transmission channel, t represents the t-time period, N PV,t,i represents the photovoltaic output of the i-th transmission channel during period t, N H,t,i represents the hydropower output of the ith transmission channel during period t, represents the actual photovoltaic output of the i-th transmission channel, r H,i is the hydropower price of the i-th transmission channel, r PV,i is the photovoltaic power price of the i-th transmission channel, f loss,i (*) is the photovoltaic power curtailment loss function of the i-th transmission channel, and Δt represents the time period.

8. The method for complementary scheduling of hydropower and photovoltaic power generation groups with coupled power abandonment losses according to claim 1 is characterized in that: The construction constraints include: According to the maximum power and minimum power that the photovoltaic power station can output, the photovoltaic output power constraint is established; The water-solar transmission capacity constraint is established based on the water-solar transmission capacity threshold, photovoltaic output power, and hydropower output power; Construct water balance constraints based on the initial storage capacity, final storage capacity, inflow, outflow, evaporation loss and duration of the power station during the target period; Constructing the reservoir water level constraint based on the upper and lower limits of the upstream water level of the power station during the target period; Construct the reservoir discharge flow constraint according to the upper and lower limits of the total discharge flow of the power station in the target period; Construct hydropower output power constraints based on the upper and lower limits of the power station's power output at the target time; Construct the reservoir water level constraint at the end of the dispatching period according to the reservoir water level at the end of the dispatching period; The climbing constraint is established according to the hydropower output at the target moment and the hydropower output at the moment before the target moment.

9. A complementary dispatching system for hydropower and photovoltaic power generation groups coupled with power abandonment losses, characterized in that: include: Hydropower output module: used to obtain the preset hydropower and solar power transmission capacity threshold and the hydropower daily average output set, and obtain the hydropower output process set according to the hydropower typical daily output process and the hydropower daily average output set; A hydropower update module: used for obtaining a hydropower output process set according to a typical photovoltaic output process in a day and the hydropower output process set, and updating the hydropower output process set according to the threshold and the hydropower output process set; Photovoltaic power abandonment module: used to obtain an updated hydropower output process set according to the photovoltaic typical day output process and the updated hydropower output process set, determine the photovoltaic power abandonment process set according to the updated hydropower output process set and the threshold, and obtain the photovoltaic power abandonment loss function according to the photovoltaic power abandonment process set and the hydropower output process set; Model building module: used to build a hydropower-photovoltaic complementary scheduling model based on photovoltaic output, hydropower output, actual photovoltaic output, output time, photovoltaic electricity price, hydropower electricity price and photovoltaic power abandonment loss function; Iteration module: used to construct constraint conditions, and iteratively solve the water-photovoltaic complementary scheduling model according to the constraint conditions to obtain photovoltaic output and hydropower output.

10. An electronic device, characterized in that: include Memory, processor, and A computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the method for complementary scheduling of a hydro-photovoltaic power source group coupled with power abandonment loss according to any one of claims 1 to 8 is implemented.

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