Power distribution area equipment cooperation method based on communication resource game of fusion terminal

Abstract

The application discloses a transformer area equipment cooperation method based on a fusion terminal communication resource game, and is realized based on a transformer area equipment cooperation system. The transformer area equipment cooperation system comprises electric equipment, power supply nodes, a fusion terminal and a total power supply terminal controlled based on the fusion terminal. The fusion terminal, the power supply nodes and the electric equipment are sequentially and signal-connected to form a communication network. The total power supply terminal, the power supply nodes and the electric equipment are sequentially and electrically connected to form a power supply network. M power supply nodes are divided into N groups according to preset grouping conditions, each group comprises more than one power supply node, the power supply nodes in the same group are signal-connected to each other, and the power supply nodes in the same group are electrically connected to each other. The transformer area equipment cooperation system divides the power supply nodes into multiple groups with electrical and communication interconnection capabilities, significantly reduces the number of concurrent communication connections of the intelligent fusion terminal, and lays a foundation for subsequent fine power cooperation control.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of power communication, in particular to a power supply area equipment coordination method based on a fusion terminal communication resource game. BACKGROUND

[0002] In a traditional low-voltage power distribution area, the power consumption behavior is a plug-and-play mode, and the power supply system needs to reserve peak capacity for each power supply node, resulting in low transformer load rate, high line loss, and great expansion pressure. In recent years, intelligent fusion terminals (referred to as fusion terminals) have been introduced into the management application of the area.

[0003] The fusion terminal, as an edge side management server, has the ability of bidirectional communication and regulation and control of power distribution. However, the uplink and downlink communication bandwidth of the fusion terminal is limited (limited by narrowband Internet of Things or power line carrier channel), and when a large number of power supply nodes and power consumption devices report power consumption intentions at the same time, communication congestion is easily caused, which in turn restricts the dynamic optimization efficiency of power resources.

[0004] Under the prior art, the fusion terminal adopts polling, priority queue or fixed time slot allocation to manage communication resources, but it is difficult to balance fairness and overall system efficiency, and cannot well meet the actual use requirements. SUMMARY

[0005] The present application discloses a fusion terminal communication resource game area equipment coordination system and method, which divides the power supply nodes into a plurality of groups with electrical and communication interconnection capabilities, and sets a response node in each group to aggregate the upload group power statistics table, significantly reducing the number of concurrent communication connections of the intelligent fusion terminal, and laying a foundation for subsequent fine power coordination control.

[0006] Correspondingly, the present application provides a power supply area equipment coordination system based on a fusion terminal hybrid communication resource game, including power consumption devices, power supply nodes, fusion terminals and total power supply and transformation terminals controlled based on the fusion terminals, the fusion terminals, power supply nodes and power consumption devices are sequentially signal connected to form a communication network, and the total power supply and transformation terminals, power supply nodes and power consumption devices are sequentially electrically connected to form a power supply network.

[0007] M power supply nodes are divided into N groups according to a preset grouping condition, each group includes one or more power supply nodes, wherein M≥2, N≥2;

[0008] The power supply nodes in the same group are signal connected to each other, and the power supply nodes in the same group are electrically connected to each other.

[0009] A communication convergence node is configured in each of the groups, and all power supply nodes in the same group are respectively connected to the communication convergence node.

[0010] In optional embodiments, a power convergence node is configured in each of the groups, and all power supply nodes in the same group are respectively connected to the power convergence node.

[0011] The power convergence node is electrically connected to the total power transformation terminal.

[0012] Correspondingly, the application provides a substation equipment coordination method based on a hybrid communication resource game of a fusion terminal, and a substation equipment coordination system based on the hybrid communication resource game of the fusion terminal is implemented, including an initialization process periodically executed.

[0013] The initialization process includes:

[0014] The fusion terminal broadcasts a heartbeat packet to the outside through all communication channels, each heartbeat packet has a cyclically generated characteristic code, and each group has only one power supply node as a response node to respond to the characteristic code in one initialization process.

[0015] The response node uploads a group power statistics table to the fusion terminal after receiving the heartbeat packet, and the group power statistics table includes H level intervals and group power requirements corresponding to each level interval.

[0016] The fusion terminal analyzes all the group power statistics tables based on a preset game rule to obtain an inter-group game result.

[0017] According to the inter-group game result, the fusion terminal allocates communication resources in units of groups, and respectively issues corresponding communication resource packets to all the response nodes, and the communication resource packet includes channel resource information.

[0018] After the response node analyzes the channel resource information obtained from the communication resource packet, the response node allocates the channel resources corresponding to the channel resource information to all power supply nodes in the group according to a preset mode, and each power supply node communicates with the fusion terminal according to the corresponding communication resource.

[0019] In optional embodiments, the characteristic codes of two adjacent heartbeat packets are different.

[0020] In optional embodiments, the total number of characteristic codes is set according to the number of heartbeat packet transmissions in one day.

[0021] Optionally, the group power statistics table is obtained by aggregating node power statistics tables of all power supply nodes in the group, and the node power statistics table is generated based on a statistics process;

[0022] The statistics process includes:

[0023] The power supply node has a corresponding score calculation formula and a grade classification system, the score calculation formula is used to calculate the real-time score of each power consumption device, and the grade classification system defines H grade intervals related to the real-time score;

[0024] The power supply node calculates the real-time score of the power consumption device by the score calculation formula, and divides the power consumption device into the corresponding score interval according to the grade classification system;

[0025] The power supply node performs total power statistics on the power consumption device in each grade interval to generate a corresponding node power statistics table.

[0026] Optionally, the group power statistics table is obtained by aggregating node power statistics tables of all power supply nodes in the group, and the node power statistics table is generated based on a statistics process includes:

[0027] The power supply node broadcasts the real-time generated node power statistics table in the group and receives the node power statistics table from other power supply nodes in the corresponding group in real time;

[0028] After the response node receives the heartbeat packet, the response node aggregates all node power statistics tables into a group power statistics table.

[0029] Optionally, the game rule includes:

[0030] Each group is taken as a game participant;

[0031] A cooperative benefit function is constructed based on the group power statistics table;

[0032] The Shapley value of each group is calculated;

[0033] The Shapley value aggregation result of each group is taken as the inter-group game result.

[0034] Optionally, the channel resource in the communication resource package includes communication channel information and communication beat information.

[0035] In summary, the application discloses a transformer area equipment cooperative system and method based on a fusion terminal mixed communication resource game, which greatly reduces the number of concurrent connections of initial communication through the grouping mode of power supply nodes, effectively avoids the congestion of communication channels, and the communication between the subsequent fusion terminal and each power supply node is pre-defined to avoid the congestion of communication channels; in the actual implementation process, the heartbeat feature code is used for dynamic election of a response node, a power statistics table is constructed, and a multi-dimensional cooperative benefit evaluation mechanism based on the Shapley value method is introduced, so that the deep fusion of communication resources and power dispatching is realized, the concurrent communication pressure of the fusion terminal is reduced, and the system scalability is improved; on the other hand, the high-collaborative-value group is ensured to obtain the communication and control rights matched with its contribution, so that the fairness of power dispatching, the reliability of power supply, and the economy of transformer area operation are considered under limited resources, and the intelligent and fine cooperative management of the low-voltage distribution network is effectively supported. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 It is an electrical structure schematic diagram of the transformer area equipment cooperative system based on the fusion terminal mixed communication resource game of the embodiment of the application.

[0037] Figure 2 It is a communication structure schematic diagram of the transformer area equipment cooperative system based on the fusion terminal mixed communication resource game of the embodiment of the application.

[0038] Figure 3 It is an initialization flowchart in the transformer area equipment system method based on the fusion terminal mixed communication resource game of the embodiment of the application. DETAILED DESCRIPTION

[0039] In order to further illustrate the technical means and effects taken by the application to achieve the predetermined purpose, the specific embodiments, structures, features and effects of the application are described in detail below in combination with the drawings and preferred embodiments. In the following description, different "an embodiment" or "embodiments" do not necessarily refer to the same embodiment. In addition, the specific features, structures or characteristics in one or more embodiments can be combined in any suitable form.

[0040] Figure 1 It is an electrical structure schematic diagram of the transformer area equipment cooperative system based on the fusion terminal mixed communication resource game of the embodiment of the application, Figure 2 It is a communication structure schematic diagram of the transformer area equipment cooperative system based on the fusion terminal mixed communication resource game of the embodiment of the application, wherein the solid line represents the electrical connection relationship, and the dashed line represents the communication connection relationship.

[0041] The application provides a transformer area equipment cooperative system based on a mixed communication resource game of a fusion terminal.

[0042] The fusion terminal, the power supply node and the power utilization equipment are sequentially signal-connected to form a communication network.

[0043] The total power supply terminal, the power supply node and the power utilization equipment are sequentially electrically connected to form a power supply network.

[0044] In the embodiment of the application, M power supply nodes are divided into N groups according to a preset grouping condition, each group includes one or more power supply nodes, wherein M≥2 and N≥2; the power supply nodes in the same group are signal-connected to each other, and the power supply nodes in the same group are electrically connected to each other.

[0045] In the specific implementation, the M power supply nodes in the transformer area are divided into N groups, each group contains at least one power supply node, .

[0046] The difference between the transformer area equipment cooperative system in the embodiment of the application and the prior art is that the power transmission path and the signal transmission path of the transformer area system in the prior art are both tree-shaped branches, the transformer area equipment cooperative system in the embodiment of the application groups the power supply nodes, the power supply nodes in the same group are coupled on the electrical line, and the signal interconnection in the group can be realized by local high-speed power line carrier communication.

[0047] Specifically, regarding the grouping method, the embodiment of the application provides a grouping logic for reference.

[0048] Specifically, the fusion terminal divides the power supply nodes connected to the same low-voltage feeder branch (such as the same meter box or the same pole transformer outgoing line) into the same initial group, the information about the low-voltage feeder branch can be obtained through the topology data of the power distribution automation system, for example, power supply node A, power supply node B and power supply node C are registered on the east branch of the transformer area, then power supply node A, power supply node B and power supply node C are first grouped, this step ensures that the nodes in the group have electrical proximity, which is beneficial to subsequent local power flow coordination and line loss optimization, and facilitates the addition of required electrical lines to the existing power supply nodes; on the basis of the preliminary grouping, if the number of power supply nodes in a group exceeds the preset upper limit (such as 8), further sub-grouping is performed according to the historical daily load curve similarity.

[0049] Specifically, the calculation method of the historical daily load curve similarity is as follows: first, each power supply node reports a typical load curve (such as the load change curve within the past 7 days) once a day, a terminal fuses the Pearson correlation coefficient or the dynamic time warping distance of the load curves of any two nodes, and nodes with a similarity higher than a threshold (such as a correlation coefficient > 0.7) are kept in the same group, otherwise, they are split into a new group; for example, the residential air conditioner load (daytime peak) and the electric vehicle charging load (nighttime peak) are complementary in behavior, and even if they are in the same feeder, they can be in different groups to improve the coordination potential.

[0050] Actually, there are two grouping ideas when grouping, one of which is to allocate power consumption nodes with similar power consumption situations in the same group (the method described in the foregoing), so that all power consumption nodes in the group can be centrally controlled for unified power supply control at the same time, reducing the logical complexity of control; the other grouping idea is to allocate power consumption nodes with large differences in power consumption situations in the same group, so that the power consumption in the entire group is close in different time periods, ensuring the stability of the group load and reducing the loss caused by fluctuation.

[0051] Specifically, the similarity and difference of the power consumption situation are essentially different descriptions of the same nature, which are mainly used to describe the similarity of the power consumption situation of the power supply node. In the embodiment of the present application, the power consumption situation refers to the load change curve of the power supply node according to time, and the similarity can be represented by the Pearson correlation coefficient.

[0052] According to actual reconstruction needs, when the existing transformer area is reconstructed, one power aggregation node can be configured in each of the groups, and all power supply nodes in the same group are electrically connected to the power aggregation node, and / or one communication aggregation node can be configured in each of the groups, and all power supply nodes in the same group are signal connected to the communication aggregation node.

[0053] Specifically, the power aggregation node and the communication aggregation node can be formed by independent node devices, or a power supply node in the group can be designated as a power aggregation node to undertake the function of collecting power flow in the group and the function of power turnover. In actual application, the total power supply and transformation terminal can directly perform the function of the entire group for the power aggregation node, and the power supply nodes in the group can take power from the power aggregation node, or can rely on the direct connection line between the power supply node and the total power supply and transformation terminal to take power.

[0054] Similarly, a separate communication aggregation node device can be set up as a communication aggregation node, or a power supply node in the group can be designated as a communication aggregation node to be responsible for the transmission and reception of information in the group.

[0055] It should be noted that the function of the power aggregation node can be understood as connecting the power supply nodes together, so that the power resources on each power supply node in the group can be transmitted to each other, and the communication aggregation node is equivalent to a multi-mode modem, which can be used as an intermediary device between the power supply node and the fusion terminal.

[0056] The communication aggregation node is one of the necessary structures of the method for realizing the substation equipment system of the embodiment of the application, and the purpose is that after the communication between the communication aggregation node and the fusion terminal, the fusion terminal allocates the communication resources for the power supply nodes according to the preset rules, and each power supply node communicates with the fusion terminal according to the configuration mode of the communication resources.

[0057] Specifically, there are various communication modes between the power supply node and the fusion terminal, for example, power carrier communication or communication through a cellular network. Since the allocation of the communication resources in the embodiment of the application is carried out in groups, correspondingly, in order to enable the allocation plan of the communication resources to be completely executed, the communication mode between the power supply node and the fusion terminal should be able to be flexibly switched, and correspondingly, the role of the communication aggregation node can be understood as an intermediary device for adjusting the communication mode between the power supply node and the fusion terminal according to the demand.

[0058] Figure 3 The initialization flowchart of the method for realizing the substation equipment system based on the game of the mixed communication resources of the fusion terminal in the embodiment of the application.

[0059] On this basis, the embodiment of the application further provides a substation equipment coordination method based on the game of the mixed communication resources of the fusion terminal, which includes an initialization flow executed at a fixed time.

[0060] Specifically, in an ideal state, the monitoring of the fusion terminal on all the power equipment in the substation should be real-time, but limited by the pressure of the communication resources, it is difficult to achieve real-time monitoring of the power equipment and to make allocation adjustment of the power resources based on the real-time monitoring. Therefore, in the embodiment of the application, the monitoring of the fusion terminal on the power equipment in the substation is timed, and the power allocation adjustment of the power supply node is made by monitoring the overall architecture condition of the substation at a fixed time.

[0061] After the monitoring and power allocation adjustment are completed once, with the progress of time, the change (entropy) of the power equipment in the entire substation tends to be complex (entropy increases), and therefore it is necessary to update the overall state of the substation at a fixed time. Therefore, the substation equipment coordination method of the embodiment of the application includes an initialization flow executed at a fixed time.

[0062] Basically, the initialization flow includes:

[0063] S101: The fusion terminal broadcasts heartbeat packets to the outside on all communication channels;

[0064] Specifically, each heartbeat packet has a cyclically generated feature code, and in the same initialization process, only one power supply node in each packet serves as a response node to respond to the feature code.

[0065] The fusion terminal broadcasts heartbeat packets on all available communication channels at a set period (for example, every 5 minutes). Each heartbeat packet carries a unique feature code , indicates the generation order or cyclic order of the heartbeat packet, .

[0066] The feature code is cyclically generated in a preset sequence, and the feature codes of adjacent heartbeat packets are different. According to the power consumption logic period in a general scenario, the total number of feature codes used in a day is determined in advance according to the heartbeat sending frequency to avoid repetition and conflict. If a day is taken as a cycle and the period is 5 minutes, then .

[0067] Correspondingly, different feature codes can be used to trigger different power supply nodes in the same group to serve as response nodes.

[0068] S102: The response node uploads a group power statistics table to the fusion terminal after receiving the heartbeat packet;

[0069] Specifically, since the heartbeat packet is broadcast in a full communication channel broadcast manner, theoretically all power supply nodes can receive the heartbeat packet. The power supply nodes in each group match and calculate the feature code in the heartbeat packet according to the locally stored role mapping rule. Due to the difference in the role mapping rule of the power supply nodes in the same group, only one power supply node in the same beat round (in one initialization process) can become the response node of this round, which significantly reduces the concurrent processing burden of the fusion terminal.

[0070] It should be noted that according to the power consumption habit, high concurrent traffic will be formed at the fusion terminal at many time nodes, for example, the idle time busy time switching time of power pricing, the working time of the factory, etc. At these time nodes, through the implementation of the embodiment of the application, the concurrent processing burden of the fusion terminal can be effectively reduced.

[0071] Specifically, after receiving the heartbeat packet, the response node aggregates the node power statistics table of all power supply nodes in the group to form a group power statistics table and uploads it to the fusion terminal.

[0072] The group power statistics table includes H level intervals and a corresponding group power requirement of each of the H level intervals .

[0073] Specifically, the group power statistics table is obtained by aggregating node power statistics tables of all power supply nodes in the group, and the node power statistics table is generated based on a statistical process.

[0074] Basically, the power supply node has a corresponding score calculation formula and a grade classification system, the score calculation formula is used to calculate the real-time score of each of the power consuming devices, and the grade classification system defines H level intervals related to the real-time score.

[0075] The score calculation formula can be multi-dimensional, and one of the score calculation formulas provided by the embodiments of the present application is used for reference.

[0076] Specifically, one power supply node corresponds to power consuming devices in real time, for any power consuming device , the power supply node calculates the real-time score according to its running state / running requirement , wherein ;

[0077] Specifically, ;

[0078] , wherein represents the importance of the power consuming device, is a normalized time offset from the typical power consumption peak at the current time, is its power elasticity coefficient, and the weight coefficient The sum of the weight coefficients is 1.

[0079] Specifically, refers to the importance score according to the differences in the nature of the power consuming device itself, for example, medical equipment takes 1.0 (the highest importance), ordinary lighting takes 0.2, and charging pile takes 0.1; In actual implementation, a table can be built for the power consuming devices involved in the power supply node, listing the power consuming device importance values of all power consuming devices; From a logical point of view, the more important the device, the more it needs to ensure the supply of power, and accordingly it should get a higher score.

[0080] Specifically, is a technical index for quantifying whether the current power consumption device is close to its most commonly used (or maximum power) period; the typical power consumption peak refers to the time period in which the power consumption device has the highest historical average power in a day, for example, the typical power consumption peak of a residential air conditioner is from 21:00 to 7:00 the next day, and the typical power consumption peak of a factory machine is from 9:00 to 17:00, which can be simplified to a representative time in actual calculation, such as taking the median value of the time period; the current time refers to the real-time time when the score calculation formula is calculated; the time offset refers to the absolute time difference between the current time and the typical power consumption peak; finally, the time offset is normalized to the interval [0, 1] to obtain the required value; logically, power consumption devices that are close to the peak are more difficult to be delayed or reduced in power supply, and should be given a higher score to ensure priority, in addition, combined with historical behavior patterns, temporary non-use of power consumption devices can be avoided to be misjudged as non-use, and the prediction accuracy is improved.

[0081] Specifically, The power elasticity coefficient represents whether the power consumption of the power consumption device can be adjusted, where 0 represents unadjustable and 1 represents completely adjustable; generally, the power elasticity coefficient of most power consumption devices is fixed, while the power elasticity coefficient of some special power consumption devices is adjustable, and a typical example is a charging pile; specifically, if the charging time of the charging pile for the car is preset to be from 21:00 to 7:00 the next day, the charging power of the charging pile is 7kw, and the battery capacity of the car is approximately 49 degrees of electricity, and the corresponding theoretical full charging time is 7 hours; therefore, at 21:00, the power elasticity coefficient of the charging pile is close to 1, and at 23:00, the power elasticity coefficient of the charging pile is close to 0, thereby ensuring that the charging pile can complete the charging task.

[0082] Finally, logically, the score calculation formula is understood, and the power consumption device with a higher score has a higher power supply demand.

[0083] Correspondingly, the statistical process includes:

[0084] S201: The power supply node calculates the real-time score of the power consumption device by the score calculation formula, and divides the power consumption device into a corresponding score interval according to the grade division system;

[0085] S202: The power supply node performs total power statistics on the power consumption devices in each grade interval to generate a corresponding node power statistical table.

[0086] Optionally, the grade division system predefines H grade intervals , covering the value interval . The power supply node divides the power consumption device according to The current or predicted power demand of each power consumer is summed up in each level interval, and the formula is: ;

[0087] The current or predicted power demand of each power consumer is summed up in each level interval, and the formula is:

[0088] Further, the grouping power statistics table is obtained by statistics of the node power statistics table of all power supply nodes in the group, and includes:

[0089] The power supply node broadcasts the node power statistics table generated in real time in the group and receives the node power statistics table from other power supply nodes in the corresponding group in real time; after the response node receives the heartbeat packet, the response node aggregates all the node power statistics tables into a grouping power statistics table.

[0090] In step S102, it should be noted that the power consumer corresponding to the power supply node includes a power consumer that is currently consuming power and a power consumer that has not yet consumed power, and accordingly, the power demand needs to be considered comprehensively for both types of power consumers.

[0091] In addition, the generation rhythm of the node power statistics table is independent of the rhythm of the heartbeat packet, and each power supply node can broadcast the node power statistics table in real time; after the response node obtains the heartbeat packet, it does not need to wait for the broadcast of the latest node power statistics table of other power supply nodes, but can directly use the latest node power statistics table received to perform related operations, so as to ensure the fast communication between the response node and the fusion terminal and speed up the rhythm of the initialization process.

[0092] S103: The fusion terminal analyzes all the grouping power statistics tables based on a preset game rule to obtain an inter-group game result;

[0093] Specifically, the grouping power statistics can be understood as the power supply importance evaluation of the power supply node to the power consumer connected to the node, and the fusion terminal needs to consider power distribution in a higher dimension, and accordingly, all the grouping power statistics tables need to be integrated and analyzed by game to obtain a more beneficial power distribution scheme for the entire transformer area.

[0094] Specifically, there are various game rules, and the present embodiment provides a game rule for reference, and the game rule can be adjusted according to the purpose to be achieved in actual application.

[0095] Specifically, the game rule adopted by the present embodiment is a distribution rule based on Shapley value design.

[0096] Specifically, first, the groups in the transformer area are regarded as a set of participants in cooperative game​ For any subset of groups (coalition), its synergy value is defined as Synergy value is used to quantify the contribution of the coalition to the overall operation of the zone in the current dispatching cycle, .

[0097] The synergy value is composed of the following three parts weighted:

[0098] Flexible adjustment potential reflects the ability of the coalition to participate in load regulation. In the calculation, the predicted power of each group in the coalition in each interval is weighted and summed, and the weight is taken from the average value of the power elasticity coefficient corresponding to the corresponding interval In logic, the stronger the adjustability of the coalition, the greater the contribution, and more communication resources should be allocated;

[0099] Key load guarantee capacity If any group in the coalition contains non-zero power in the highest priority interval (such as interval 1) in any prediction period, the value of this item is 1, otherwise it is 0, which is used to identify the coalition with important load guarantee requirements;

[0100] Line loss reduction potential is calculated based on the power fluctuation of the net load of the coalition in the prediction period. Specifically, first, the total load time series curve of the coalition is synthesized, and then its standard deviation is calculated; the smaller the standard deviation, the more stable the load, the smaller the line current fluctuation, and the lower the line loss, the higher the value of this item; The total load time series curve of the coalition refers to the fluctuation of the power consumption estimate of the entire coalition in the current heartbeat packet period. Generally, the fusion terminal continuously records the reported power of each group in the coalition in the past period (at the same time point in a single day) to construct a historical load sequence; when calculating the line loss reduction potential, the standard deviation of the historical sequence is used as a proxy indicator of volatility under the current synergy state.

[0101] The aforementioned three items are linearly combined by a preset weight (satisfying the condition ) to obtain the synergy value calculation formula.

[0102] .

[0103] For each group , its Shapley value is calculated, and the Shapley value is used as a measure of the fair contribution of the group to the overall synergy of the system.

[0104] Shapley value defined as a group The weighted average of marginal benefit brought by adding all possible alliances, mathematically expressed as:

[0105] ;

[0106] Wherein, represents the Shapley value of the group , represents the fairness contribution of the group to the whole district collaborative system, the greater the value, the higher the marginal benefit brought by the group in various collaborative combinations, and more communication resource quota should be obtained;

[0107] is the group number;

[0108] represents the group set;

[0109] represents the whole group set after excluding the group ;

[0110] represents the alliance ;

[0111] represents the alliance excluding the group ;

[0112] is the total number of groups;

[0113] is the factorial symbol;

[0114] represents the size of the alliance, that is, the number of groups included in the alliance;

[0115] represents the difference between the synergy value of the group after joining the alliance and the alliance .

[0116] Specifically, considering that the actual district is usually small, and the fusion terminal has good edge computing capability, it can directly traverse alliances to complete accurate calculation; when is large, Monte Carlo random sampling method can be used for approximate solution to save computing resources.

[0117] The application converts the communication resource allocation from the traditional on-demand allocation or static priority allocation to the contribution-based allocation by introducing the Shapley value game method. Firstly, the resource obtained by each group is proportional to the real marginal contribution of the group to the overall system benefit, which has good fairness. Secondly, in order to obtain more communication resources, the user needs to actively deploy high flexibility equipment (such as a battery) and participate in load collaboration to improve the overall flexibility of the transformer area. In addition, the limited communication bandwidth is preferentially served to the group that can bring the maximum system benefit, which improves the resource utilization efficiency. In addition, relying on the group aggregation and time sequence power prediction mechanism, the required data can be obtained under the existing architecture without additional sensors or communication overhead, which has good practical significance.

[0118] It should be noted that the parameters selected by the embodiment of the application when calculating the collaborative benefit value include three indexes of flexible adjustment potential, key load guarantee capacity and line loss reduction potential. From the logical understanding, the more flexible adjustment potential is worth spending communication resources to adjust, the more important the load is worth spending communication resources to adjust, and the greater the power fluctuation is worth spending communication resources to suppress power fluctuation and reduce line loss. In actual implementation, the collaborative benefit value calculation formula can be constructed according to the content concerned, so as to achieve the required purpose and demand. The embodiment of the application does not make additional description.

[0119] S104: According to the inter-group game result, the fusion terminal allocates communication resources in units of groups, and respectively issues corresponding communication resource packages to all the response nodes;

[0120] The communication resource package includes channel resource information;

[0121] As known from the foregoing description, the communication mode between the fusion terminal and the power supply node is various. When calculating the total channel resource of the fusion terminal, the channel resources of different communication modes are generally unified into channel resources in a unified system, such as the total bandwidth in a broadband network. Correspondingly, the essence of allocating channel resources is to allocate the total bandwidth.

[0122] In the inter-group game result, the Shapley values of each group are arranged in descending order, and the groups with higher ranking can obtain more communication resources (bandwidth). The specific bandwidth calculation method can be set according to actual requirements.

[0123] S105: After the response node parses the communication resource package to obtain the channel resource information, the response node allocates the channel resources corresponding to the channel resource information to all the power supply nodes in the group according to a preset mode.

[0124] Each of the power supply nodes communicates with the fusion terminal according to the corresponding communication resource.

[0125] After the response node parses the communication resource package and obtains the corresponding channel resource information, the response node distributes the channel resource to each power supply node in the group according to a preset strategy (for example, according to the power ratio), so as to realize differentiated communication support.

[0126] In actual implementation, the specific description of the communication resource (bandwidth in the embodiment of the application) can be that the channel resource includes a communication channel and a communication beat. The communication channel can be understood as a communication port, and the communication beat can be understood as the length of the allowed data frame, the uploading frequency and other substantive communication interaction contents.

[0127] The communication logic defined based on the channel resource determined by the communication resource package will continue to the next initialization process. In actual application, the fusion terminal generally reserves about 5% to 10% of the communication resource for emergency situations. Each power supply node can directly send relevant information through the corresponding channel when necessary.

[0128] In summary, the embodiment of the application provides a transformer area equipment collaboration system and method based on a fusion terminal mixed communication resource game. By grouping the power supply nodes, dynamically electing the response node by the heartbeat feature code, constructing the power statistical table and introducing a multi-dimensional collaborative benefit evaluation mechanism based on the Shapley value method, the deep integration of communication resources and power dispatching is realized. On the one hand, the concurrent communication pressure of the fusion terminal is significantly reduced, and the system scalability is improved. On the other hand, the group with high collaborative value ensures that the communication and control rights match its contribution, so as to balance the dispatch fairness, power supply reliability and economic efficiency of the transformer area operation under limited resources, effectively supporting the intelligent and fine collaborative management of the low-voltage distribution network.

[0129] It should be noted that the implementation premise of the transformer area equipment collaboration system and method based on the fusion terminal mixed communication resource game provided by the embodiment of the application is that the external communication resource of the fusion terminal is limited, and the power resource input into the transformer area is also limited. The communication capability between the power supply nodes in the group is relatively unlimited, and the power can also circulate in the group. Correspondingly, in the entire transformer area equipment collaboration method based on the fusion terminal mixed communication resource game, some processing steps are executed by the power supply nodes in the group, and the fusion terminal is only responsible for the most core power distribution logic steps. On the one hand, the interaction data content between the fusion terminal and the power supply nodes is less, which does not bring too much communication pressure to the fusion terminal. On the other hand, it also does not rely too much on the computing power resources of the fusion terminal, which plays a role similar to a distributed cluster, and is conducive to the computing power of each device in the entire transformer area.

[0130] The above only describes the preferred embodiments of the present application and should not be used to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for substation equipment coordination based on a hybrid communication resource game of a fusion terminal, characterized in that, The application is based on a transformer district equipment coordination system, which comprises power utilization equipment, power supply nodes, a fusion terminal and a general power supply terminal controlled by the fusion terminal. The fusion terminal, power supply nodes and power utilization equipment are sequentially connected to form a communication network. The general power supply terminal, power supply nodes and power utilization equipment are sequentially connected to form a power supply network. M power supply nodes are divided into N groups according to preset grouping conditions, wherein M≥2 and N≥2. Each group comprises one or more power supply nodes. The power supply nodes in the same group are connected to each other in signal and in electricity. A communication convergence node is configured in each group. All power supply nodes in the same group are connected to the communication convergence node in signal. The communication convergence node is connected to the fusion terminal in signal. The transformer district equipment coordination method comprises an initialization process periodically executed. The initialization process comprises: The fusion terminal broadcasts heartbeat packets to the outside through all communication channels. Each heartbeat packet has a cyclically generated characteristic code. Only one power supply node in each group acts as a response node to respond to the characteristic code in one initialization process. The response node uploads a group power statistical table to the fusion terminal after receiving the heartbeat packet. The group power statistical table comprises H level intervals and the corresponding group power demand of each level interval. The fusion terminal analyzes all group power statistical tables based on preset game rules to obtain inter-group game results. According to the inter-group game results, the fusion terminal allocates communication resources in groups and respectively issues corresponding communication resource packets to all response nodes. The communication resource packet comprises channel resource information. After the response node analyzes the channel resource information in the communication resource packet, it allocates the corresponding channel resources to all power supply nodes in the group according to a preset mode. Each power supply node communicates with the fusion terminal according to the corresponding communication resource.

2. The method of claim 1, wherein the method further comprises: The characteristic codes of adjacent heartbeat packets are different. 3.The method of claim 1, wherein, The total number of characteristic codes is set according to the number of heartbeat packets sent in a day.

4. The method of claim 1, wherein the method further comprises: The group power statistical table is obtained by aggregating node power statistical tables of all power supply nodes in the group. The node power statistical table is generated based on a statistical process. The statistical process comprises: The power supply node has a corresponding score calculation formula and a level division system. The score calculation formula is used to calculate the real-time score of each power utilization equipment. The level division system defines H level intervals related to the real-time score. The power supply node calculates the real-time score of the power utilization equipment by the score calculation formula and divides the power utilization equipment into corresponding score intervals according to the level division system. The power supply node statistically calculates the total power of the power utilization equipment in each level interval to generate a corresponding node power statistical table.

5. The method of claim 4, wherein the method further comprises: The group power statistical table is obtained by aggregating node power statistical tables of all power supply nodes in the group. The node power statistical table is generated based on a statistical process. The power supply node broadcasts the node power statistics table generated in real time in a packet and receives node power statistics tables from other power supply nodes in the corresponding packet in real time; After the response node receives the heartbeat packet, the response node aggregates all the node power statistics tables into a group power statistics table.

6. The method of claim 1, wherein the method further comprises: The game rules include: Each group is a game participant; A cooperative benefit function is constructed based on the group power statistics table; The Shapley value of each group is calculated; The Shapley value aggregation result of each group is used as the inter-group game result.

7. The method of claim 1, wherein the method further comprises: The channel resources in the communication resource package include communication channel information and communication beat information.

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