Regional market supply-demand ratio calculation method and device based on load optimization

Abstract

The invention relates to a regional market supply-demand ratio calculation method and device based on load optimization. The method comprises the following steps: acquiring a power market supply-demand ratio calculation model of a target area, and configuring load increase information for each node in the power market supply-demand ratio calculation model; adjusting the optimization direction of a target function in the power market supply-demand ratio calculation model to a target direction to obtain an adjusted power market supply-demand ratio calculation model; obtaining a first load increment, a second load increment and a third load increment of a power system corresponding to the target area based on the first load increase mode, the second load increase mode and the third load increase mode and the optimized and adjusted power market supply-demand ratio calculation model; and determining the maximum load increment from the first load increment, the second load increment and the third load increment as a market maximum supply output value, and obtaining a market supply-demand ratio calculation result of the target area. By adopting the method, the accuracy of power supply-demand ratio calculation can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric power, and in particular to a load optimization-based regional market supply-demand ratio calculation method and device, computer equipment, computer readable storage medium and computer program product. BACKGROUND

[0002] With the rapid development of the electric power market, the market supply-demand ratio, as an important indicator of the relationship between the total demand and the total supply, is of great significance to the healthy and stable development of the economy, the effective allocation of resources, and the provision of decision support. An accurate market supply-demand ratio can not only promote the rational circulation of electric power resources and services, but also effectively guide economic activities and improve overall economic efficiency.

[0003] The traditional market supply-demand ratio calculation method is obtained by dividing the supply and demand values on both sides, which can only reflect the theoretically available resources in the electric power market, ignoring the problem of resource unavailability caused by inter-area blockage in practice. Moreover, in the regional market, the traditional method takes the tie-line plan as an optimization condition, which further leads to the failure of supply-demand ratio calculation.

[0004] Therefore, the traditional technology has the problem of poor accuracy of electric power market supply-demand ratio calculation. SUMMARY

[0005] Therefore, it is necessary to provide a load optimization-based regional market supply-demand ratio calculation method, device, computer equipment, computer readable storage medium and computer program product that can improve the accuracy of electric power market supply-demand ratio calculation.

[0006] In a first aspect, the present application provides a load optimization-based regional market supply-demand ratio calculation method, which comprises:

[0007] obtaining a load optimization-based regional market supply-demand ratio calculation model, and configuring load increase information for each node in the load optimization-based regional market supply-demand ratio calculation model; the load increase information is used to add an additional load amount in the corresponding node;

[0008] adjusting the optimization direction of the objective function in the load optimization-based regional market supply-demand ratio calculation model to a target direction to obtain an adjusted load optimization-based regional market supply-demand ratio calculation model; the target direction is the maximum load increment that the power system corresponding to the target region can withstand;

[0009] optimizing the adjusted load optimization-based regional market supply-demand ratio calculation model based on a first load increase mode, a second load increase mode and a third load increase mode to obtain a first load increment, a second load increment and a third load increment of the power system corresponding to the target region;

[0010] determining a maximum load increment from the first load increment, the second load increment and the third load increment as a market maximum supply power value;

[0011] obtaining a market supply-demand ratio calculation result of the target area according to the market maximum supply power value.

[0012] In one of the embodiments, the nodes include power unit nodes and load nodes, and the first load increment, the second load increment and the third load increment of the power system corresponding to the target area are obtained based on the first load increasing mode, the second load increasing mode and the third load increasing mode, respectively, including:

[0013] the first load increment is determined by increasing the load of each of the power unit nodes and taking the total value of the increased load of each of the power unit nodes as the maximum load increment of the target direction;

[0014] the second load increment and the third load increment of the power system corresponding to the target area are obtained according to the load nodes by using the second load increasing mode and the third load increasing mode, respectively.

[0015] In one of the embodiments, the load nodes include key load nodes and designated load nodes, and the second load increment and the third load increment of the power system corresponding to the target area are obtained according to the load nodes by using the second load increasing mode and the third load increasing mode, respectively, including:

[0016] the second load increment is determined by increasing the load of the key load nodes and taking the value of the increased load of the key load nodes as the maximum load increment of the target direction;

[0017] the third load increment is determined by increasing the load of the designated load nodes and taking the value of the increased load of the designated load nodes as the maximum load increment of the target direction.

[0018] In one of the embodiments, the adjusted power market supply-demand ratio calculation model is optimized based on the first load increasing mode, including:

[0019] a first increased load calculation formula is defined according to the first load increasing mode, and the increased load characteristics of each of the power unit nodes are determined; the first increased load calculation formula is used to obtain the total value of the increased load of each of the power unit nodes;

[0020] the power flow calculation formula and the calculation constraint condition in the adjusted power market supply-demand ratio calculation model are optimized according to the increased load characteristics to obtain a first optimized power flow calculation formula;

[0021] The first optimized power flow calculation formula includes a first cross-section power flow constraint formula obtained by subtracting the newly added load from the output of each power unit node.

[0022] In one of the embodiments, the optimization of the adjusted power market supply-demand ratio calculation model based on the second load increase mode includes:

[0023] According to the second load increase mode, a second load increase calculation formula is defined, and the power flow calculation formula and the calculation constraint condition in the adjusted power market supply-demand ratio calculation model are optimized to obtain a second optimized power flow calculation formula.

[0024] The second load increase calculation formula is used to obtain the load increase value of the key load node, and the second optimized power flow calculation formula includes a second cross-section power flow constraint formula obtained by putting the load increase value of the key load node into the node bus load value.

[0025] In one of the embodiments, the optimization of the adjusted power market supply-demand ratio calculation model based on the third load increase mode includes:

[0026] According to the third load increase mode, a third load increase calculation formula is defined, and the power flow calculation formula and the calculation constraint condition in the adjusted power market supply-demand ratio calculation model are optimized to obtain a third optimized power flow calculation formula.

[0027] The third load increase calculation formula is used to obtain the load increase value of the specified load node, and the third optimized power flow calculation formula includes a third cross-section power flow constraint formula obtained by putting the load increase value of the specified load node into the node bus load value.

[0028] In a second aspect, the application further provides a regional market supply-demand ratio calculation device based on load optimization, which comprises:

[0029] A model node adjustment module is configured to obtain a power market supply-demand ratio calculation model of a target region, and configure load increase information in each node of the power market supply-demand ratio calculation model. The load increase information is used to additionally add a load amount in the corresponding node.

[0030] A model target adjustment module is configured to adjust the optimization direction of an objective function in the power market supply-demand ratio calculation model to a target direction to obtain an adjusted power market supply-demand ratio calculation model. The target direction is the maximum load increment that can be borne by the power system corresponding to the target region.

[0031] a model optimization module, configured to optimize the adjusted power market supply-demand ratio calculation model based on the first load increase mode, the second load increase mode, and the third load increase mode respectively, to obtain the first load increment, the second load increment, and the third load increment of the power system corresponding to the target region;

[0032] a maximum output determination module, configured to determine the maximum load increment from the first load increment, the second load increment, and the third load increment as the market maximum supply output value;

[0033] a supply-demand ratio calculation module, configured to obtain the market supply-demand ratio calculation result of the target region according to the market maximum supply output value.

[0034] In a third aspect, the present application also provides a computer device, including a memory and a processor, the memory stores a computer program, and the processor implements the steps of the above method when executing the computer program.

[0035] In a fourth aspect, the present application also provides a computer readable storage medium, which stores a computer program, and the computer program implements the steps of the above method when executed by a processor.

[0036] In a fifth aspect, the present application also provides a computer program product, which includes a computer program, and the computer program implements the steps of the above method when executed by a processor.

[0037] The above load-optimized regional market supply-demand ratio calculation method, device, computer device, computer readable storage medium, and computer program product, by obtaining a power market supply-demand ratio calculation model of a target region, configuring load increase information for each node in the power market supply-demand ratio calculation model, the load increase information being used to additionally add a load amount in the corresponding node, adjusting the optimization direction of the objective function in the power market supply-demand ratio calculation model to a target direction, obtaining an adjusted power market supply-demand ratio calculation model, the target direction being the maximum load increment that can be borne by the power system corresponding to the target region, then optimizing the adjusted power market supply-demand ratio calculation model based on the first load increase mode, the second load increase mode, and the third load increase mode respectively, to obtain the first load increment, the second load increment, and the third load increment of the power system corresponding to the target region, determining the maximum load increment from the first load increment, the second load increment, and the third load increment as the market maximum supply output value, and then obtaining the market supply-demand ratio calculation result of the target region according to the market maximum supply output value, the target direction and node load configuration of the model are optimized, the accuracy of power supply-demand ratio calculation can be effectively improved, and reliable data support is provided for power system planning and reasonable allocation. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application or the related art. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other related drawings can also be obtained from these drawings without creative labor.

[0039] Figure 1 A flowchart of a load-optimization-based regional market supply-demand ratio calculation method in an embodiment;

[0040] Figure 2 A flowchart of a different load increase mode processing flow in an embodiment;

[0041] Figure 3 A flowchart of a load-optimization-based regional market supply-demand ratio calculation method in another embodiment;

[0042] Figure 4 A structural block diagram of a load-optimization-based regional market supply-demand ratio calculation device in an embodiment;

[0043] Figure 5 An internal structure diagram of a computer device in an embodiment. DETAILED DESCRIPTION

[0044] In order to make the purposes, technical solutions and advantages of the present application clearer, the following will further describe the present application in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0045] In an exemplary embodiment, as shown in Figure 1 a load-optimization-based regional market supply-demand ratio calculation method is provided. In this embodiment, the method is exemplarily applied to a terminal. It should be understood that the method can also be applied to a server, and can also be applied to a system including a terminal and a server, and can be realized through the interaction of the terminal and the server. In this embodiment, the method includes the following steps 101 to 104. Wherein:

[0046] Step 101, obtaining a power market supply-demand ratio calculation model of a target region, and configuring load increase information for each node in the power market supply-demand ratio calculation model.

[0047] Wherein, the load increase information can be used to additionally add a load amount in the corresponding node; such as setting an added load ΔD in each node.

[0048] As an example, the power market supply-demand ratio calculation model of the target region can be a current regional spot market clearing model, the nodes in the model correspond one-to-one to the nodes in the power system of the target region, for example, various bus nodes in the power system, which include key connection points related to units and loads; the nodes are the basic units of power system flow calculation, load distribution and output optimization, and the model can simulate the carrying capacity of the system under different load distribution by setting new loads for different nodes, so as to realize simulation and optimization calculation of the actual operation state of the power system.

[0049] In actual application, based on the current regional spot market clearing model (i.e. the power market supply-demand ratio calculation model), an added load can be set in each node, i.e. load increase information. Thus, the problem that the traditional model does not consider the influence of node load distribution on actual callable resources can be solved.

[0050] Step 102, adjusting the optimization direction of the objective function in the power market supply-demand ratio calculation model to a target direction to obtain an adjusted power market supply-demand ratio calculation model.

[0051] The target direction is the maximum load increment that the power system corresponding to the target region can withstand.

[0052] In specific implementation, the objective function of the power market supply-demand ratio calculation model can be adjusted to be load maximum, for example, based on the regional spot market clearing model, by adjusting the optimization target to be the maximum load that can be increased at all nodes or key nodes or certain specific nodes, the maximum market available output can be further obtained, and the actual supply-demand ratio of the market can be calculated.

[0053] For example, by adjusting the objective function of the model to be load maximum, the scenario of increasing load at different nodes can be simulated to measure the maximum load that the power system can withstand under actual constraints (such as cross-section congestion, tie-line planning, etc.), and thus the maximum market callable output can be determined.

[0054] Step 103, respectively based on the first load increase mode, the second load increase mode and the third load increase mode, optimizing the adjusted power market supply-demand ratio calculation model to obtain the first load increment, the second load increment and the third load increment of the power system corresponding to the target region.

[0055] The power system can include all unit nodes, load nodes, key load points and power facilities such as transmission lines and cross-sections connecting the nodes within the target region, which are the actual power network as a whole corresponding to the regional spot market clearing model.

[0056] Specifically, the power flow calculation formula in the adjusted power market supply-demand ratio calculation model can be optimized in a load-increasing manner, and different load increments are obtained in a load-increasing manner to determine the full-market maximum supply output value, so as to calculate the regional market supply-demand ratio. The power flow calculation formula is a formula used to calculate the flow distribution of the power system, which involves the flow of voltage, power, current and other parameters of each node in the network. By adjusting the power flow calculation formula in a load-increasing manner, the demand for obtaining the full-market maximum supply output value can be adapted.

[0057] In an example, based on the regional spot market clearing model, the power flow calculation is adapted to the scenario of increasing load by adjusting the constraint conditions, optimization objectives and key parameters related to the power flow calculation, so as to accurately solve the maximum callable output of the system. Thus, by setting the added load in each node and optimizing the power flow calculation formula, the model can fully tap the maximum power supply potential of the system under the premise of considering the actual grid constraints, providing a data basis for further selecting the maximum callable output value and recalculating the supply-demand ratio, and solving the distortion of the supply-demand ratio caused by the traditional method ignoring the actual constraints.

[0058] Step 104: determining the maximum load increment from the first load increment, the second load increment and the third load increment as the market maximum supply output value.

[0059] In actual application, by adjusting the optimization objective to the maximum load that can be increased by the system and optimizing the clearing model, the maximum callable output value (i.e. the market maximum supply output value) can be obtained, so that based on multiple optimization methods of increasing load, the problem that single-node load addition cannot fully reflect the maximum output of the system can be solved, ensuring that the maximum callable output value of the system closest to the actual and more accurate is obtained, which helps to support subsequent plan allocation.

[0060] Step 105: obtaining the market supply-demand ratio calculation result of the target region according to the market maximum supply output value.

[0061] In an example, by selecting the maximum value of the load increment based on the three different schemes of load increase, the maximum callable output value of the system can be determined, and then the regional market supply-demand ratio (i.e. the market supply-demand ratio calculation result of the target region) can be calculated. Thus, based on the optimized model, the problem that the market resources cannot be called due to the situation of section congestion can be solved, and the limitation that the market supply-demand ratio cannot be calculated due to the optimization conditions of the tie-line plan used for calculation in the traditional method can be avoided. The technical scheme of the embodiment can accurately calculate to obtain a supply-demand ratio more consistent with the actual operation, which helps to more reasonably allocate the maximum callable output of the power market, so that the power market can develop healthily and stably.

[0062] In the above load-based optimization regional market supply-demand ratio calculation method, by obtaining a power market supply-demand ratio calculation model of a target region, configuring load increase information for each node in the power market supply-demand ratio calculation model, adjusting the optimization direction of the objective function in the power market supply-demand ratio calculation model to a target direction, obtaining an adjusted power market supply-demand ratio calculation model, then based on a first load increase mode, a second load increase mode and a third load increase mode, optimizing the adjusted power market supply-demand ratio calculation model, obtaining a first load increment, a second load increment and a third load increment of a power system corresponding to the target region from the first load increment, the second load increment and the third load increment, determining the maximum load increment from the first load increment, the second load increment and the third load increment as a market maximum supply output value, and further obtaining a market supply-demand ratio calculation result of the target region according to the market maximum supply output value, the target direction and node load configuration optimization of the model are realized, the accuracy of power supply-demand ratio calculation is effectively improved, and reliable data support is provided for power system planning and reasonable distribution.

[0063] In an exemplary embodiment, the nodes can include power unit nodes and load nodes, and the obtaining of the first load increment, the second load increment and the third load increment of the power system corresponding to the target region based on the first load increase mode, the second load increase mode and the third load increase mode can include the following steps:

[0064] The first load increment is determined by increasing the load of each power unit node on average, and taking the total value of the increased load of each power unit node as the maximum load increment of the target direction; the second load increment and the third load increment of the power system corresponding to the target region are obtained according to the load nodes by using the second load increase mode and the third load increase mode respectively.

[0065] In actual application, the load increase scheme can include scheme one (i.e. the first load increase mode), in which the load is evenly distributed to all nodes, and the total value of the increased load of each node can be taken as the final optimization target; for example, as shown in Figure 2 the load of each unit node is increased to obtain a system load increment D1 (i.e. the first load increment).

[0066] In an exemplary embodiment, the load nodes can include key load nodes and designated load nodes, and the obtaining of the second load increment and the third load increment of the power system corresponding to the target region according to the load nodes by using the second load increase mode and the third load increase mode can include the following steps:

[0067] The second load increment is determined by adding load to the key load node, and the added load value of the key load node is taken as the maximum load increment of the target direction; and the third load increment is determined by adding load to the specified load node, and the added load value of the specified load node is taken as the maximum load increment of the target direction.

[0068] In a specific implementation, the load increment scheme can further include: scheme two (i.e., the second load increment manner), by distributing load to specific key load points, the key node load summary value can be taken as the final optimization target; and scheme three (i.e., the third load increment manner), by distributing load to specified load points, the specified node load summary value can be taken as the final optimization target.

[0069] For example, as shown in Figure 2 The load can be added to the specific key load point to obtain the system load increment value D2 (i.e., the second load increment), and the load can be added to the specified load point to obtain the system load increment value D3 (i.e., the third load increment), and then the maximum value can be selected from D1, D2 and D3 as the system maximum callable output value.

[0070] In an exemplary embodiment, the optimization of the adjusted power market supply-demand ratio calculation model based on the first load increment manner can include the following steps:

[0071] According to the first load increment manner, a first added load calculation formula is defined, and the added load characteristics of each power unit node are determined; the first added load calculation formula is used to obtain the total added load value of each power unit node; and according to the added load characteristics, the power flow calculation formula and the calculation constraint condition in the adjusted power market supply-demand ratio calculation model are optimized to obtain a first optimized power flow calculation formula.

[0072] The first optimized power flow calculation formula includes a first cross-section power flow constraint formula, which is obtained by subtracting the added load from the output of each power unit node.

[0073] Optionally, the added load characteristics can be adapted to the average load addition manner to support the adjustment of the constraint conditions in the model according to the first load increment manner, for example, the model can adjust the system balance constraint, the system positive reserve constraint, the system negative reserve constraint and the cross-section power flow constraint, etc., to ensure that in the scenario of average load distribution, the power flow calculation can accurately reflect the system carrying capacity, so as to reasonably obtain the system load increment value D1.

[0074] In an example, for scheme one, by adding load to each unit node, the average added load of each node can be defined as The system increases the load value (i.e., the total value of the increased load of each power unit node) as (i.e., the first increased load calculation formula):

[0075]

[0076] Each node has the following characteristics of increased load:

[0077]

[0078] Where Na is the total number of regional units. Further, the clearing model can be modified as follows:

[0079] 1. System balance constraint:

[0080] At each time period t, the regional system load balance constraint can be described as:

[0081]

[0082] Add the system-wide increased load content on the system load side, and keep the other contents consistent.

[0083] 2. System positive reserve constraint:

[0084] The regional system positive reserve capacity constraint is adjusted to:

[0085]

[0086] Set the system positive reserve to 0.

[0087] 3. System negative reserve constraint;

[0088] The regional system negative reserve capacity constraint is adjusted to:

[0089]

[0090] In the system negative reserve constraint, add the content of the system-wide increased load, and keep the rest consistent.

[0091] 4. Section flow constraint:

[0092] The key section flow constraint formula (i.e., the first section flow constraint formula) is adjusted to:

[0093]

[0094] In the section flow constraint formula, since the added load is located in the unit node, the output of each unit needs to be deducted from the new load.

[0095] Where, The bus load stretching factor also needs to be adjusted:

[0096]

[0097] 5. The optimization objective of the mathematical model is:

[0098] The original SCUC (Security Constrained Unit Commitment) optimization objective function can be adjusted as follows:

[0099]

[0100] After adding the load in each node, the node load needs to be added in the stretching factor. Since the difference between the added load and the main island load is large, in order to reduce the complexity of the calculation, the load optimization calculation can be performed according to the stretching factor before the load is added. Then, after obtaining the maximum value of the target load, the actual bus load stretching factor is recalculated, and then the cross-section power flow constraint can be checked. If the cross-section power flow constraint is not broken, the calculation is passed, otherwise the stretching factor needs to be substituted to solve again.

[0101] In this embodiment, by defining a first increased load calculation formula according to the first load increasing mode, and determining the increased load characteristics of each power unit node, the power flow calculation formula and the calculation constraint condition in the adjusted power market supply and demand ratio calculation model are optimized and adjusted to obtain a first optimized power flow calculation formula. Multiple different schemes can be provided to avoid that a single node load addition cannot comprehensively reflect the maximum system output.

[0102] In an exemplary embodiment, the optimization of the adjusted power market supply and demand ratio calculation model based on the second load increasing mode can include the following steps:

[0103] According to the second load increasing mode, a second increased load calculation formula is defined, and the power flow calculation formula and the calculation constraint condition in the adjusted power market supply and demand ratio calculation model are optimized to obtain a second optimized power flow calculation formula. The second increased load calculation formula is used to obtain the increased load value of the key load node. The second optimized power flow calculation formula includes a second cross-section power flow constraint formula, which is obtained by putting the increased load value of the key load node into the node bus load value.

[0104] In actual application, by adding the load to the specific key load point, the system increased load value (i.e. the increased load value of the key load node) can be defined as:

[0105]

[0106] Wherein, n is a specific key load point of the added load (which can be set in advance), and the following modifications can be made to the clearing model:

[0107] 1. System balance constraint:

[0108] In each time period t, the regional system load balance constraint can be described as:

[0109]

[0110] Add the content of the total system increased load on the system load side, and the rest remains the same.

[0111] 2. System positive reserve constraint:

[0112] The regional system positive reserve capacity constraint is adjusted to:

[0113]

[0114] Set the system positive reserve to 0.

[0115] 3. System negative reserve constraint:

[0116] The regional system negative reserve capacity constraint is adjusted to:

[0117]

[0118] In the system negative reserve constraint, add the content of the total system increased load, and the rest remains the same.

[0119] 4. Sectional flow constraint:

[0120] The key sectional flow constraint formula (i.e. the second sectional flow constraint formula) is adjusted to:

[0121]

[0122] In the sectional flow constraint formula, the added system load is placed in the node bus load value. Wherein, is the bus load stretching factor, which also needs to be adjusted:

[0123]

[0124] Due to the large difference between the added load and the main island load, in order to reduce the complexity of the calculation, the load optimization calculation can be performed according to the stretching factor before the added load, and after obtaining the target load maximum value, the actual bus load stretching factor is recalculated; and the sectional flow constraint is checked, if the sectional flow constraint is not broken, the calculation is passed, otherwise the stretching factor needs to be substituted to solve again.

[0125] In this embodiment, by defining a second increased load calculation formula according to the second load increasing mode, and optimizing the power flow calculation formula and the calculation constraint condition in the adjusted power market supply-demand ratio calculation model, a second optimized power flow calculation formula is obtained, which can provide a plurality of different schemes to avoid that a single node load addition cannot comprehensively reflect the maximum output of the system.

[0126] In one exemplary embodiment, the optimization of the adjusted power market supply-demand ratio calculation model based on the third load increasing mode can include the following steps:

[0127] According to the third load increasing mode, a third increased load calculation formula is defined, and the power flow calculation formula and the calculation constraint condition in the adjusted power market supply-demand ratio calculation model are optimized to obtain a third optimized power flow calculation formula; wherein the third increased load calculation formula is used to obtain the increased load value of the specified load node; and the third optimized power flow calculation formula includes a third cross-section power flow constraint formula, which is obtained by putting the increased load value of the specified load node into the node bus load value.

[0128] In an example, by adding load to the specified partial load point, the system increased load value (i.e. the increased load value of the specified load node) can be defined as:

[0129]

[0130] wherein n is the specified load point to which the load is added, and the node to which the load is added can be obtained by system optimization. Further, the out-of-clear model can be modified as follows:

[0131] 1. System balance constraint:

[0132] In each time period t, the regional system load balance constraint can be described as:

[0133]

[0134] The system increased load content is added on the system load side, and the others remain unchanged.

[0135] 2. System positive reserve constraint:

[0136] The regional system positive reserve capacity constraint is adjusted to:

[0137]

[0138] The system positive reserve setting is adjusted to 0.

[0139] 3. System negative reserve constraint:

[0140] The regional system negative reserve capacity constraint is adjusted to:

[0141]

[0142] In the system standby constraint, the content of the total system increased load is added, and the remaining content remains unchanged.

[0143] 4. Cross-section flow constraint:

[0144] The formula of the key cross-section flow constraint (i.e., the third cross-section flow constraint formula) is adjusted as follows:

[0145]

[0146] In the cross-section flow constraint formula, the added system load is put into the node bus load value. Among them, is the bus load stretching factor, which also needs to be adjusted:

[0147]

[0148] Due to the large difference between the added load and the main island load, in order to reduce the complexity of the calculation, the load optimization calculation can be performed according to the stretching factor before the added load, and after obtaining the target load maximum value, the actual bus load stretching factor is recalculated; and the cross-section flow constraint is checked, if the cross-section flow constraint is not broken, the calculation is passed, otherwise the stretching factor needs to be substituted into the calculation for re-solution.

[0149] In this embodiment, by defining the third increased load calculation formula according to the third load increasing mode, and optimizing the adjusted power market supply and demand ratio calculation model in the flow calculation formula and the calculation constraint condition, the third optimized flow calculation formula is obtained, which can provide multiple different schemes to avoid the single node load addition unable to comprehensively reflect the system maximum output.

[0150] In one exemplary embodiment, as shown in Figure 3 Another flowchart of a load optimization-based regional market supply and demand ratio calculation method is provided. In this embodiment, the method includes the following steps:

[0151] In step 301, an electricity market supply-demand ratio calculation model of a target area is acquired, load increase information is configured for each node in the electricity market supply-demand ratio calculation model, an optimization direction of an objective function in the electricity market supply-demand ratio calculation model is adjusted to a target direction, and an adjusted electricity market supply-demand ratio calculation model is obtained. In step 302, the adjusted electricity market supply-demand ratio calculation model is optimized based on a first load increase mode, a second load increase mode, and a third load increase mode, respectively. In step 303, a first load increment is determined by averaging the load increase of each power unit node and taking the total value of the load increase of each power unit node as the maximum load increment of the target direction. In step 304, a second load increment is determined by increasing the load of a key load node and taking the value of the load increase of the key load node as the maximum load increment of the target direction. In step 305, a third load increment is determined by increasing the load of a specified load node and taking the value of the load increase of the specified load node as the maximum load increment of the target direction. In step 306, the maximum load increment is determined from the first load increment, the second load increment, and the third load increment, as the market maximum supply output value, and the market supply-demand ratio calculation result of the target area is obtained according to the market maximum supply output value.

[0152] It should be noted that the specific definitions of the above steps can refer to the specific definitions of the above-mentioned method for calculating the supply-demand ratio of a regional market based on load optimization, which will not be repeated here.

[0153] It should be understood that, although each step in the flowchart involved in each of the above-mentioned embodiments is displayed in sequence according to the arrow, these steps are not necessarily executed in the order indicated by the arrow. Unless otherwise specified herein, the execution of these steps is not strictly limited in sequence, and these steps can be executed in other orders. Moreover, at least part of the steps in the flowchart involved in each of the above-mentioned embodiments can include multiple steps or stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution sequence of these steps or stages is not necessarily sequential, but can be executed alternately or alternately with at least part of other steps or stages.

[0154] Based on the same inventive concept, the embodiments of the present application also provide a device for implementing the above-mentioned method for calculating the supply-demand ratio of a regional market based on load optimization. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme described in the above-mentioned method, and therefore the specific definitions in one or more device embodiments for calculating the supply-demand ratio of a regional market based on load optimization provided below can refer to the definitions of the method for calculating the supply-demand ratio of a regional market based on load optimization described above, which will not be repeated here.

[0155] In one example embodiment, as shown in Figure 4 A load-optimized regional market supply-demand ratio calculation device is provided, comprising:

[0156] A model node adjustment module 401 is configured to obtain a power market supply-demand ratio calculation model of a target region, and configure load increase information for each node in the power market supply-demand ratio calculation model; the load increase information is used to additionally add a load amount in the corresponding node;

[0157] A model target adjustment module 402 is configured to adjust an optimization direction of an objective function in the power market supply-demand ratio calculation model to a target direction, to obtain an adjusted power market supply-demand ratio calculation model; the target direction is a maximum load increment that can be borne by a power system corresponding to the target region;

[0158] A model optimization module 403 is configured to optimize the adjusted power market supply-demand ratio calculation model based on a first load increase mode, a second load increase mode, and a third load increase mode, respectively, to obtain a first load increment, a second load increment, and a third load increment of the power system corresponding to the target region;

[0159] A maximum output determination module 404 is configured to determine a maximum load increment from the first load increment, the second load increment, and the third load increment as a market maximum supply output value;

[0160] A supply-demand ratio calculation module 405 is configured to obtain a market supply-demand ratio calculation result of the target region according to the market maximum supply output value.

[0161] In one example embodiment, the nodes include power unit nodes and load nodes, and the model optimization module 403 is specifically configured to determine the first load increment by increasing the load of each power unit node on average, and taking a total value of the increased load of each power unit node as the maximum load increment of the target direction; and obtain the second load increment and the third load increment of the power system corresponding to the target region according to the load nodes by respectively adopting the second load increase mode and the third load increase mode.

[0162] In one example embodiment, the load nodes include key load nodes and designated load nodes, and the model optimization module 403 is specifically further configured to determine the second load increment by increasing the load of the key load nodes, and taking a value of the increased load of the key load nodes as the maximum load increment of the target direction; and determine the third load increment by increasing the load of the designated load nodes, and taking a value of the increased load of the designated load nodes as the maximum load increment of the target direction.

[0163] In one of the embodiments, the model optimization module 403 is specifically configured to define a first increased load calculation formula according to the first load increasing mode, and determine an increased load characteristic of each power unit node; the first increased load calculation formula is used to obtain a total value of the increased load of each power unit node; according to the increased load characteristic, a power flow calculation formula and a calculation constraint condition in the adjusted power market supply-demand ratio calculation model are optimized to obtain a first optimized power flow calculation formula; wherein the first optimized power flow calculation formula includes a first cross-section power flow constraint formula, and the first cross-section power flow constraint formula is obtained by subtracting the new load from the output of each power unit node.

[0164] In one of the embodiments, the model optimization module 403 is specifically configured to define a second increased load calculation formula according to the second load increasing mode, and optimize a power flow calculation formula and a calculation constraint condition in the adjusted power market supply-demand ratio calculation model to obtain a second optimized power flow calculation formula; wherein the second increased load calculation formula is used to obtain an increased load value of the key load node; and the second optimized power flow calculation formula includes a second cross-section power flow constraint formula, and the second cross-section power flow constraint formula is obtained by putting the increased load value of the key load node into the node bus load value.

[0165] In one of the embodiments, the model optimization module 403 is specifically configured to define a third increased load calculation formula according to the third load increasing mode, and optimize a power flow calculation formula and a calculation constraint condition in the adjusted power market supply-demand ratio calculation model to obtain a third optimized power flow calculation formula; wherein the third increased load calculation formula is used to obtain an increased load value of the specified load node; and the third optimized power flow calculation formula includes a third cross-section power flow constraint formula, and the third cross-section power flow constraint formula is obtained by putting the increased load value of the specified load node into the node bus load value.

[0166] The above-mentioned various modules in the regional market supply-demand ratio calculation device based on load optimization can be realized by software, hardware and combinations thereof, in whole or in part. The above-mentioned various modules can be embedded in or independent of the processor in the computer device in hardware form, or can be stored in the memory in the computer device in software form, so as to be called and executed by the processor to perform the operations corresponding to the above-mentioned various modules.

[0167] In one of the embodiments, a computer device is provided, which can be a terminal, and the internal structure diagram thereof can be as shown in Figure 5The computer device shown in the figure includes a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. Among them, the processor, the memory and the input / output interface are connected through the system bus, and the communication interface, the display unit and the input device are connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capability. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operating system and the computer program in the non-volatile storage medium to run. The input / output interface of the computer device is used to exchange information between the processor and external devices. The communication interface of the computer device is used to communicate with external terminals in a wired or wireless manner. The wireless manner can be realized through WIFI, mobile cellular network, Near Field Communication (NFC) or other technologies. The computer program is executed by the processor to realize a load-optimized regional market supply-demand ratio calculation method.

[0168] Those skilled in the art can understand that, Figure 5 The structure shown in the figure is only a block diagram of part of the structure related to the scheme of the present application, and does not constitute a limitation on the computer device to which the scheme of the present application is applied. The specific computer device can include more or fewer components than those shown in the figure, or combine certain components, or have a different component arrangement.

[0169] In one exemplary embodiment, a computer device is provided, including a memory and a processor, the memory storing a computer program, and the processor executing the computer program to realize the following steps:

[0170] Obtain a power market supply-demand ratio calculation model of a target region, and configure load increase information for each node in the power market supply-demand ratio calculation model; the load increase information is used to additionally add a load amount in the corresponding node;

[0171] Adjust the optimization direction of the objective function in the power market supply-demand ratio calculation model to a target direction to obtain an adjusted power market supply-demand ratio calculation model; the target direction is the maximum load increment that the power system corresponding to the target region can withstand;

[0172] Optimize the adjusted power market supply-demand ratio calculation model based on the first load increase mode, the second load increase mode and the third load increase mode respectively to obtain the first load increment, the second load increment and the third load increment of the power system corresponding to the target region;

[0173] determining a maximum load increment from the first load increment, the second load increment, and the third load increment as a market maximum supply power value;

[0174] obtaining a market supply-demand ratio calculation result of the target region according to the market maximum supply power value.

[0175] In one embodiment, the processor, when executing the computer program, also implements the steps of the load-optimization-based regional market supply-demand ratio calculation method in the other embodiments.

[0176] In one embodiment, a computer-readable storage medium is provided, and the computer-readable storage medium stores a computer program. The computer program, when executed by a processor, implements the following steps:

[0177] obtaining a power market supply-demand ratio calculation model of a target region, and configuring load increase information for each node in the power market supply-demand ratio calculation model; the load increase information is used to additionally add a load amount in the corresponding node;

[0178] adjusting an optimization direction of an objective function in the power market supply-demand ratio calculation model to a target direction to obtain an adjusted power market supply-demand ratio calculation model; the target direction is a maximum load increment that can be borne by a power system corresponding to the target region;

[0179] optimizing the adjusted power market supply-demand ratio calculation model based on a first load increase mode, a second load increase mode, and a third load increase mode, respectively, to obtain a first load increment, a second load increment, and a third load increment of the power system corresponding to the target region;

[0180] determining a maximum load increment from the first load increment, the second load increment, and the third load increment as a market maximum supply power value;

[0181] obtaining a market supply-demand ratio calculation result of the target region according to the market maximum supply power value.

[0182] In one embodiment, the computer program, when executed by a processor, also implements the steps of the load-optimization-based regional market supply-demand ratio calculation method in the other embodiments.

[0183] In one embodiment, a computer program product is provided, and the computer program product includes a computer program. The computer program, when executed by a processor, implements the following steps:

[0184] obtaining a power market supply-demand ratio calculation model of a target region, and configuring load increase information for each node in the power market supply-demand ratio calculation model; the load increase information is used to additionally add a load amount in the corresponding node;

[0185] The optimization direction of the objective function in the power market supply and demand ratio calculation model is adjusted to a target direction, to obtain an adjusted power market supply and demand ratio calculation model; the target direction is a maximum load increment that the power system corresponding to the target region can bear;

[0186] The adjusted power market supply and demand ratio calculation model is optimized based on the first load increase mode, the second load increase mode and the third load increase mode respectively, to obtain a first load increment, a second load increment and a third load increment of the power system corresponding to the target region;

[0187] The maximum load increment is determined from the first load increment, the second load increment and the third load increment, as a market maximum supply output value;

[0188] According to the market maximum supply output value, a market supply and demand ratio calculation result of the target region is obtained.

[0189] In one embodiment, the computer program, when executed by the processor, also implements the steps of the load-based optimization regional market supply and demand ratio calculation method in the other embodiments.

[0190] It should be noted that the user information (including but not limited to user equipment information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in the present application are all information and data authorized by the user or authorized by all parties, and the collection, use and processing of related data need to comply with relevant regulations.

[0191] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer readable storage medium, and when executed, can include the processes of the above-mentioned embodiment methods. Any reference to memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. The non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical storage, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. The volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration but not limitation, the RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The database involved in the embodiments provided in the present application can include at least one of a relational database and a non-relational database. The non-relational database can include a distributed database based on a block chain, etc., without being limited thereto. The processor involved in the embodiments provided in the present application can be a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., without being limited thereto.

[0192] The technical features of the above embodiments can be combined in any manner. To make the description concise, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations of the technical features do not exist, they should be considered as the scope of the present application.

[0193] The above-described embodiments are merely illustrative of several embodiments of the present application, and the description is relatively specific and detailed, but should not be understood as a limitation on the scope of the patent. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of the present application. Therefore, the scope of protection of the present application should be subject to the appended claims.

Claims

1. A method for calculating regional market supply-demand ratio based on load optimization, characterized in that: The method comprises: Obtaining a power market supply-demand ratio calculation model for a target area, and configuring load increase information for each node in the power market supply-demand ratio calculation model; the load increase information is used to add additional load to the corresponding node; Adjusting the optimization direction of the objective function in the power market supply-demand ratio calculation model to a target direction, thereby obtaining an adjusted power market supply-demand ratio calculation model; wherein the target direction is a maximum load increment that the power system corresponding to the target area can bear; Optimizing the adjusted power market supply-demand ratio calculation model based on the first load increase method, the second load increase method, and the third load increase method, respectively, to obtain a first load increment, a second load increment, and a third load increment of the power system corresponding to the target area; Determine the largest load increment from the first load increment, the second load increment, and the third load increment as the maximum market supply output value; A calculation result of the market supply-demand ratio of the target area is obtained according to the maximum supply output value of the market.

2. The method according to claim 1, characterized in that The nodes include power unit nodes and load nodes, and obtaining a first load increment, a second load increment, and a third load increment of the power system corresponding to the target area based on the first load increase mode, the second load increase mode, and the third load increase mode, respectively, includes: Determine the first load increment by increasing the load of each of the power unit nodes on average and taking the total value of the increased load of each of the power unit nodes as the maximum load increment in the target direction; The second load increase mode and the third load increase mode are respectively adopted to obtain a second load increment and a third load increment of the power system corresponding to the target area according to the load node.

3. The method according to claim 2, characterized in that The load nodes include key load nodes and designated load nodes, and respectively adopting the second load increase mode and the third load increase mode to obtain a second load increment and a third load increment of the power system corresponding to the target area according to the load nodes includes: Determine the second load increment by increasing the load on the key load node and taking the increased load value of the key load node as the maximum load increment in the target direction; The third load increment is determined by increasing the load on the designated load node and taking the increased load value of the designated load node as the maximum load increment in the target direction.

4. The method according to claim 2, characterized in that Optimizing the adjusted power market supply-demand ratio calculation model based on the first load increase method includes: According to the first load increase mode, a first load increase calculation formula is defined, and the load increase characteristics of each of the power unit nodes are determined; the first load increase calculation formula is used to obtain the total value of the load increase of each of the power unit nodes; According to the increased load characteristics, optimizing the power flow calculation formula and calculation constraints in the adjusted power market supply and demand ratio calculation model to obtain a first optimized power flow calculation formula; The first optimized power flow calculation formula includes a first section power flow constraint formula, and the first section power flow constraint formula is obtained by deducting the newly added load from the output of each power unit node.

5. The method according to claim 3, characterized in that Optimizing the adjusted power market supply-demand ratio calculation model based on the second load increase method includes: According to the second load increase method, a second load increase calculation formula is defined, and the power flow calculation formula and calculation constraints in the adjusted power market supply and demand ratio calculation model are optimized to obtain a second optimized power flow calculation formula; Among them, the second increased load calculation formula is used to obtain the increased load value of the critical load node; the second optimized flow calculation formula includes a second section flow constraint formula, and the second section flow constraint formula is obtained by putting the increased load value of the critical load node into the node bus load value.

6. The method according to claim 3, characterized in that Optimizing the adjusted power market supply-demand ratio calculation model based on the third load increase method includes: According to the third load increase method, a third load increase calculation formula is defined, and the power flow calculation formula and calculation constraints in the adjusted power market supply and demand ratio calculation model are optimized to obtain a third optimized power flow calculation formula; Among them, the third increased load calculation formula is used to obtain the increased load value of the specified load node; the third optimized flow calculation formula includes a third section flow constraint formula, and the third section flow constraint formula is obtained by putting the increased load value of the specified load node into the node bus load value.

7. A device for calculating regional market supply-demand ratio based on load optimization, characterized in that: The device comprises: A model node adjustment module is used to obtain a power market supply-demand ratio calculation model for a target area and configure load increase information for each node in the power market supply-demand ratio calculation model; the load increase information is used to add additional load to the corresponding node; a model objective adjustment module, configured to adjust the optimization direction of the objective function in the power market supply-demand ratio calculation model to a target direction, thereby obtaining an adjusted power market supply-demand ratio calculation model; wherein the target direction is the maximum load increment that the power system corresponding to the target area can bear; a model optimization module, configured to optimize the adjusted power market supply-demand ratio calculation model based on the first load increase method, the second load increase method, and the third load increase method, respectively, to obtain a first load increment, a second load increment, and a third load increment of the power system corresponding to the target area; a maximum output determination module, configured to determine a maximum load increment from the first load increment, the second load increment, and the third load increment as a maximum market supply output value; The supply-demand ratio calculation module is used to obtain the market supply-demand ratio calculation result of the target area according to the maximum supply output value of the market.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

10. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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