A classification method for load characteristics of a distribution network

Abstract

The present invention belongs to the technical field of power system analysis, and particularly relates to a method for classifying the load characteristics of a distribution network. Based on the subordinate relationship between the distribution network feeder and the substation, this method uses the precise state estimation method of the distribution network to calculate the load power of the distribution network. Combining the load characteristics of the distribution network with the power supply path of the distribution network load, a weighted method is used to analyze the distribution of various characteristic loads of the distribution network feeder, and the classification summary of the load characteristics of the substation is statistically obtained. According to the classification ratio of the load characteristics of the distribution network, the method of the present invention combines the precise load estimation method of the distribution network under the current situation of low coverage of the distribution network measurement and acquisition, so as to achieve the precise classification of the load characteristics of the distribution network feeder and even the substation, and significantly improve the problem of insufficient fineness of the load property division in the existing distribution network load characteristic classification method, providing more refined data support for advanced applications such as the load portrait of the distribution network.

Description

Technical Field

[0001] The present invention belongs to the technical field of power system analysis, and particularly relates to a method for classifying load characteristics of a distribution network. Background Art

[0002] The classification of load characteristics of the distribution network is increasing day by day, the division of load characteristics is becoming more and more detailed, the coverage rate of load power measurement is still relatively low, the classification conditions for load characteristics of distribution network feeders and even substations are becoming increasingly mature, and load characteristic classification is crucial for power consumption planning and power consumption situation analysis. Existing distribution network load characteristic classification methods are mostly applicable to dividing load properties according to the load types (public transformers, special transformers) of the distribution network. With the development of technology, the fineness of such methods for dividing load characteristics is significantly insufficient. Therefore, a distribution network load characteristic classification method based on accurate load estimation of the distribution network is proposed. Summary of the Invention

[0003] In view of this, an embodiment of the present invention proposes a method for classifying load characteristics of a distribution network, particularly a method for classifying load characteristics of feeders and substations in a distribution network. In view of the limitation of the fineness of load characteristic division in the prior art, combined with accurate load estimation of the distribution network, a more refined distribution network load characteristic classification method is realized.

[0004] To achieve the above object, according to one aspect of the embodiments of the present invention, a method for classifying load characteristics of a distribution network is proposed.

[0005] The method for classifying load characteristics of a distribution network according to an embodiment of the present invention includes:

[0006] Read the device measurement information in the distribution network. The device measurement information includes device number, device name, and measured power, and add the device measurement information to the distribution network device measurement information list;

[0007] Read the mapping relationship table between the load characteristics and load ratios of load devices in the distribution network;

[0008] According to the distribution network model, establish a distribution network device list;

[0009] Construct a distribution network substation list and a distribution network feeder list respectively. Store each high-voltage side main transformer bus root node of the distribution network substation in the un-searched node list, create a feeder for each high-voltage side main transformer bus root node in the un-searched node list in turn, and determine the connection relationship between the distribution network feeder and the distribution network substation;

[0010] Perform a forward topology search on the distribution network model, set the feeder to which the device belongs as the feeder to which the current node belongs, until the end of the power grid or a switch device with a remote signaling state of off is searched, to obtain the connection relationship between devices and nodes in the distribution network, the connection relationship between nodes and nodes, and the connection relationship between distribution network devices and distribution network feeders;

[0011] According to the connection relationship between devices and nodes in the distribution network, and in accordance with the distribution network device measurement information list in step (1), divide the distribution network into distribution network measurement partitions, allocate the distribution network load devices to each distribution network measurement partition, and determine the distribution network load devices included in the distribution network measurement partition;

[0012] According to the distribution network load devices included in the determined distribution network measurement partition, allocate the measured power in the distribution network device measurement information in step (1) to each load device in the distribution network measurement partition according to the proportionality coefficient between the capacity of each load device in the measurement partition and the total capacity of all load devices in the measurement partition, to obtain the load device power of the distribution network measurement partition;

[0013] Construct a feeder load device list for each feeder in the distribution network feeder list, and according to the connection relationship between the load device and the distribution network feeder in the connection relationship between the distribution network device and the distribution network feeder, add the load devices to a feeder load device list of the connected feeder respectively;

[0014] According to the load device power of the distribution network measurement partition, the load characteristic proportionality parameter of the load device, and the load devices included in the feeder load device list, obtain the mapping relationship table between the load characteristics and the load power of each distribution network feeder. The load characteristic with the highest proportion of load power in the mapping relationship table between the load characteristics and the load power of the feeder is the load characteristic of the distribution network feeder;

[0015] According to the connection relationship between the distribution network feeder and the distribution network substation and the mapping relationship table between the load characteristics and the load power of the distribution network feeder, obtain the mapping relationship table between the load characteristics and the load power of the distribution network substation including the feeder. The load characteristic with the highest proportion of load power in the mapping relationship table between the load characteristics and the load power of the distribution network substation is the load characteristic of the distribution network substation.

[0016] Optionally, the steps of separately constructing a distribution network substation list and a distribution network feeder list, storing each high-voltage side main transformer bus root node of the distribution network substation in an un-searched node list, and successively creating feeders for each high-voltage side main transformer bus root node in the un-searched node list to determine the connection relationship between the distribution network feeder and the distribution network substation include:

[0017] (1) Set up an un-searched node list;

[0018] (2) Create a new feeder, set the root node of the current high-voltage side main transformer busbar of the distribution network substation to belong to this feeder, set the current root node to be in a live state, add this feeder to a feeder list of the substation to which the high-voltage side main transformer belongs, and add the current substation to the substation list, and determine that this feeder is connected to the substation to which the current high-voltage side main transformer belongs;

[0019] (3) Judge the nodes in the current un-searched node list. If the current root node is not the last node in the un-searched node list, obtain the next node from the un-searched node list and return to step (1). If the current root node is the last node in the un-searched node list, complete the creation of the feeder for the root node of the high-voltage side main transformer busbar, and determine the connection relationship between the distribution network feeder and the distribution network substation.

[0020] Optionally, perform a forward topology search on the distribution network model, set the feeder to which the device belongs as the feeder to which the current node belongs, until the end of the power grid or a switch device with a remote signaling state of off is searched, to obtain the connection relationship between devices and nodes, the connection relationship between nodes and nodes, and the connection relationship between distribution network devices and distribution network feeders in the distribution network, including:

[0021] (1) Judge the un-searched node list. If the un-searched node list is empty, jump to step (5). If the un-searched node list is not empty, set the length of the un-searched node list to NS, and initialize the search node serial number to 1;

[0022] (2) Set the search node counting position node of the un-searched node list as the current node, set the feeder to which the current node belongs as the current feeder, and judge the node device list of the current node. If the node device list of the current node is empty, jump to step (3). If the node device list of the current node is not empty, traverse the node devices in the node device table of the current node and perform the following steps:

[0023] (2-1) Obtain the first node device in the node device list of the current node, and set this node device as the current node device;

[0024] (2-2) Judge this current node device. If the current node device has been traversed, jump to step (2-6). If the current node device has not been traversed, perform step (2-3);

[0025] (2-3) Determine that the current node device is connected to the current feeder, and determine that the current node device has been traversed;

[0026] (2-4) Judge the type of the current node device. If the type of the current node device is a single-ended device, jump to step (2-6). If the type of the current node device is a double-ended device, obtain the peer node of the double-ended device from the two associated nodes of the double-ended device, and perform step (2-5);

[0027] (2-5) Judge the peer node. If the peer node has been traversed, jump to step (2-6). If the peer node has not been traversed, determine that the peer node is connected to the current feeder, and determine that the peer node has been traversed, and determine that the peer node is in a live state. The parent node of the peer node is the current node. Add the peer node to a child node list of the current node, add the peer node to the end of the list of nodes to be searched, and perform step (2-6);

[0028] (2-6) Judge the list of node devices of the current node. If the current node device is not the last device in the list of node devices of the current node, obtain the next device in the list of node devices of the current node, set the device as the current node device, and return to step (2-2). If the current node device is the last device in the list of node devices of the current node, continue with step (3);

[0029] (3) Judge the search node serial number. If the search node serial number is less than the length NS of the list of nodes to be searched, increment the search node serial number count by 1, and return to step (2). If the search node serial number is equal to NS, perform step (4);

[0030] (4) Remove the first NS traversed nodes from the list of nodes to be searched, and return to step (1);

[0031] (5) The list of nodes to be searched is empty, and the forward topology search ends.

[0032] Optionally, according to the connection relationship between devices and nodes in the distribution network, and according to the list of distribution network device measurement information, divide the distribution network into distribution network measurement partitions, allocate distribution network load devices to each distribution network measurement partition, and determine the distribution network load devices included in the distribution network measurement partitions, including:

[0033] (1) Obtain a device measurement information in the current list of device measurement information;

[0034] (2) According to the device measurement information in step (1), obtain the distribution network device corresponding to the device measurement information, construct a distribution network device measurement partition corresponding to the device measurement information, set the power measurement of the distribution network measurement partition as the power of the current device measurement information, and add the distribution network measurement partition to a list of distribution network measurement partitions;

[0035] (3) Based on the connection relationship between the devices and nodes in the distribution network, obtain the nodes and the node device list corresponding to the distribution network devices in step (2), and add the load devices in the node device list to a load device list in the current distribution network measurement partition;

[0036] (4) According to the parent-child relationship between the distribution network nodes in the connection relationship between the nodes, obtain the list of child nodes of the nodes corresponding to the distribution network devices, and judge the list of child nodes. If the list of child nodes is empty, jump to step (5). If the list of child nodes is not empty, sequentially obtain the device lists of the nodes in the list of child nodes, and add the load devices in the node device list to the load device list in the current measurement partition in step (3);

[0037] (5) Judge the current device measurement information. If the current device measurement information is the last device measurement information in the device measurement information list, end the allocation of the distribution network load devices to each distribution network measurement partition. If the current device measurement information is not the last device measurement information in the device measurement information list, obtain the next device measurement information in the device measurement information list, and return to step (2).

[0038] Optionally, according to the distribution network load devices included in the distribution network measurement partition, allocate the measured power in the distribution network device measurement information to each load device in the distribution network measurement partition according to the proportional coefficient between the capacity of each load device in the measurement partition and the total capacity of all load devices in the measurement partition, to obtain the power of the load devices in the distribution network measurement partition, including:

[0039] (1) Obtain a measurement partition from the distribution network measurement partition list;

[0040] (2) According to the load devices included in the distribution network measurement partition, obtain the list of load devices in the first measurement partition, and calculate the total load capacity of this measurement partition. The specific steps are as follows:

[0041] (2-1) Initialize the total load capacity of the measurement partition to zero, and obtain a load device from the list of load devices in the measurement partition;

[0042] (2-2) Obtain the capacity of the current load device, so that the total load capacity of the measurement partition = the total load capacity of the measurement partition + the capacity of the current load device;

[0043] (2-3) Judge the list of load devices in the current measurement partition. If the current load device is the last load in the list of load devices, jump to step (3). If the current load device is not the last load in the list of load devices, obtain the next load device from the list of load devices, and return to step (2-2);

[0044] (3) According to the list of load devices included in the measurement sub - area of the distribution network, allocate the power of the measurement sub - area of the distribution network to the load devices in the measurement sub - area. The specific steps are as follows:

[0045] (3 - 1) Obtain a load device from the list of load devices in the measurement sub - area;

[0046] (3 - 2) Calculate the ratio of the capacity of the current load device to the total load capacity of the measurement sub - area, and allocate the power of the measurement sub - area of the distribution network to the current load device according to this ratio. The power of the current load device = the power of the measurement sub - area × the proportionality coefficient;

[0047] (3 - 3) Judge the current load device. If the current load device is the last load in the list of load devices, the power allocation of the load devices in the current measurement sub - area ends; if the current load device is not the last load in the list of load devices, obtain the next load device in the list of load devices, and return to step (3 - 2);

[0048] (4) Judge the current measurement sub - area. If the current measurement sub - area is the last measurement sub - area in the list of measurement sub - areas of the distribution network, end the power allocation of each load device in the measurement sub - area of the distribution network; if the current measurement sub - area is not the last measurement sub - area in the list of measurement sub - areas of the distribution network, obtain the next measurement sub - area in the list of measurement sub - areas of the distribution network, and return to step (2).

[0049] Optionally, according to the power of the load devices in the measurement sub - area of the distribution network, the proportionality parameter of the load characteristics of the load devices, and the load devices included in the list of load devices of the feeder, obtain the mapping relationship table between the load characteristics and the load power of each distribution network feeder. The load characteristic with the highest proportion of load power in the mapping relationship table between the load characteristics and the load power of the feeder is the load characteristic of the distribution network feeder, including:

[0050] (1) Obtain a distribution network feeder from the list of distribution network feeders;

[0051] (2) Construct a mapping relationship table between the load characteristics and the load power for this distribution network feeder, and initialize the mapping relationship table between the load characteristics and the load power of the distribution network feeder according to the list of load devices of the feeder. The specific steps are as follows:

[0052] (2 - 1) Set a mapping relationship table between the load characteristics and the load power of a distribution network feeder;

[0053] (2 - 2) Obtain a load device from the list of load devices of the feeder;

[0054] (2-3) Judge the load characteristics in the mapping relationship table between the load characteristics and the load ratio in sequence. If the load characteristic exists in the mapping relationship table between the load characteristics and the load power of the feeder, the initialization of the load power corresponding to the load characteristic in the mapping relationship table between the load characteristics and the load power of the feeder ends. If the load characteristic does not exist in the mapping relationship table between the load characteristics and the load power of the feeder, add the load characteristic to the mapping relationship table between the load characteristics and the load power of the feeder, and initialize the load power corresponding to the load characteristic in the mapping relationship table between the load characteristics and the load power of the feeder to zero;

[0055] (2-4) Judge the current load device in step (2-2). If the current load device is the last device in the feeder load device list, jump to step (3). If the current load device is not the last device in the feeder load device list, obtain the next load device in the feeder load device list, and return to step (2-3);

[0056] (3) Calculate the power of each load characteristic in the mapping relationship table between the load characteristics and the load power of the distribution network feeder according to the load devices included in the feeder load device list in claim 1. The specific steps are as follows:

[0057] (3-1) Obtain a load device in the feeder load device list;

[0058] (3-2) Obtain a load characteristic and a load ratio of the load device according to the mapping relationship between the load ratio and the load characteristic;

[0059] (3-3) Calculate the product of the power of the load device and the above load ratio according to the above load ratio in step (3-2), add the product value to the corresponding load power in the mapping relationship table between the load characteristics and the load power of the distribution network feeder, and set the corresponding load power value in the mapping relationship table between the load characteristics and the load power of the distribution network feeder to the above added value;

[0060] (3-4) Judge the mapping relationship table between the load characteristics and the load ratio of the load device. If the mapping relationship between the load ratio and the load characteristic of the load device is the last mapping relationship in the mapping relationship table between the load characteristics and the load ratio of the load device, jump to step (4). If the mapping relationship between the load ratio and the load characteristic of the load device is not the last mapping relationship in the mapping relationship table between the load characteristics and the load ratio of the load device, obtain the next load characteristic and load ratio in the mapping relationship table between the load characteristics and the load ratio of the load device, and return to step (3-3);

[0061] (4) Judge the current load device. If the current load device is the last device in the feeder load device list, jump to step (5). If the current load device is not the last device in the feeder load device list, obtain the next load device in the feeder load device list and repeat step (3);

[0062] (5) Sum up the load powers in the mapping table of the load characteristics and load powers of the distribution network feeder obtained in step (3) to obtain the total load power of the feeder. Calculate the ratio of each load power in the mapping table of the load characteristics and load powers of the distribution network feeder to the total load power of the feeder respectively. The load characteristic corresponding to the highest ratio among all the ratios is the load characteristic of the distribution network feeder;

[0063] (6) Judge the current feeder. If the current feeder is not the last feeder in the distribution network feeder list, obtain the next feeder in the distribution network feeder list and repeat step (2). If the current feeder is the last feeder in the distribution network feeder list, obtain the mapping table of the load characteristics and load powers of each feeder in the distribution network feeder list and the load characteristics of the distribution network feeder.

[0064] Optionally, according to the connection relationship between the distribution network feeder and the distribution network substation and the mapping table of the load characteristics and load powers of the distribution network feeder, obtain the mapping table of the load characteristics and load powers of the distribution network substation including the feeder. The load characteristic with the highest proportion of load power in the mapping table of the load characteristics and load powers of the distribution network substation is the load characteristic of the distribution network substation, including:

[0065] (1) Obtain a substation from the distribution network substation list;

[0066] (2) Construct a mapping table of the load characteristics and load powers for this substation and initialize the mapping table of the load characteristics and load powers for this substation according to the feeder list of the distribution network substation. The specific steps are as follows:

[0067] (2-1) Set a mapping table of the load characteristics and load powers of a distribution network substation;

[0068] (2-2) Obtain a feeder from the feeder list of the substation;

[0069] (2-3) Judge the load characteristics in the mapping table of the load characteristics and load power of the current feeder in sequence. If the load characteristic exists in the mapping table of the load characteristics and load power of this substation, the initialization of the load power corresponding to this load characteristic in the mapping table of the load characteristics and load power of this substation ends; if the load characteristic does not exist in the mapping table of the load characteristics and load power of this substation, add this load characteristic to the mapping table of the load characteristics and load power of this substation, and initialize the load power corresponding to this load characteristic in the mapping table of the load characteristics and load power of this substation to zero;

[0070] (2-4) Judge the current feeder in step (2-2). If the current feeder is the last feeder in the feeder list of the current substation, jump to step (3); if the current feeder is not the last feeder in the feeder list of the current substation, obtain the next feeder in the feeder list of the current substation, and return to step (2-3);

[0071] (3) Calculate the power of each load characteristic in the mapping table of the load characteristics and load power of the distribution network substation according to the distribution network feeders included in the feeder list of the distribution network substation. The specific steps are as follows:

[0072] (3-1) Obtain a feeder in the feeder list of the substation;

[0073] (3-2) Obtain a load characteristic and load power of this feeder according to the mapping table of the load characteristics and load power of this feeder;

[0074] (3-3) Add the above load power to the load power corresponding to it in the mapping table of the load characteristics and load power of the substation, and set the corresponding load power value in the mapping table of the load characteristics and load power of the substation to the above added value;

[0075] (3-4) Judge the mapping table of the load characteristics and load power of this feeder. If the mapping of the load characteristics and load power of this feeder is the last mapping relationship in the mapping table of the load characteristics and load power of this feeder, jump to step (4); if the mapping of the load characteristics and load power of this feeder is not the last mapping relationship in the mapping table of the load characteristics and load power of this feeder, obtain the next load characteristic and load power of the mapping table of the load characteristics and load power of this feeder, and repeat step (3-3);

[0076] (4) Judge the current feeder. If the current feeder is the last feeder in the feeder list of the current substation, jump to step (5). If the current feeder is not the last feeder in the feeder list of the current substation, obtain the next feeder in the feeder list of the substation, and repeat step (3);

[0077] (5) Sum up the load powers in the mapping table of the load characteristics and load powers of the distribution network substation obtained in step (3) to obtain the total load power of the substation. Calculate the ratio of each load power in the mapping table of the load characteristics and load powers of the current distribution network substation to the total load power of the substation respectively. The load characteristic corresponding to the highest ratio among all the ratios is the load characteristic of the substation;

[0078] (6) Judge the current substation. If the current substation is not the last substation in the distribution network substation list, obtain the next substation in the distribution network substation list and repeat step (2). If the current substation is the last substation in the distribution network substation list, obtain the mapping table of the load characteristics and load powers of each substation in the distribution network substation list and the load characteristics of the substation.

[0079] According to another aspect of the present invention, an electronic device is provided.

[0080] An electronic device according to an embodiment of the present invention includes:

[0081] One or more processors;

[0082] A storage device for storing one or more programs;

[0083] When the one or more programs are executed by the one or more processors, the one or more processors implement the distribution network load characteristic classification method according to the embodiment of the present invention.

[0084] According to still another aspect of the present invention, a computer-readable medium is provided.

[0085] A computer-readable medium according to an embodiment of the present invention has a computer program stored thereon, and when the program is executed by a processor, the distribution network load characteristic classification method according to the embodiment of the present invention is implemented.

[0086] The method for classifying the load characteristics of a distribution network proposed in an embodiment of the present invention has the following advantages or beneficial effects: According to the classification ratio of the load characteristics of the distribution network, in the current situation where the measurement and acquisition coverage of the distribution network is low, combined with the accurate load estimation method of the distribution network, it achieves accurate classification of the load characteristics of the distribution network feeder and even the substation, significantly improving the problem of insufficient refinement in the classification of load properties in the existing distribution network load characteristic classification methods, and providing more refined data support for advanced applications such as distribution network load profiling.

[0087] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0088] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0089] Figure 1 is a flowchart of a method for classifying the load characteristics of a distribution network according to an embodiment of the method of the present invention.

[0090] Figure 2 is a flowchart of the forward topology search involved in an embodiment of the method of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0091] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0092] Figure 1 is a flowchart of a method for classifying the load characteristics of a distribution network according to an embodiment of the present invention, including:

[0093] In step 1, read the device measurement information in the distribution network from the distribution network dispatching center. The device measurement information includes the device number, device name, and measured power, and add the device measurement information to the distribution network device measurement information list.

[0094] In step 2, read the mapping relationship table between the load characteristics and load ratios of the load devices in the distribution network from the distribution network dispatching center.

[0095] In step 3, according to the distribution network model, a distribution network equipment list is established; the distribution network equipment model is read, and the distribution network equipment model includes node information, two-terminal equipment information, and single-terminal equipment information. The power grid model is simplified into nodes, single-terminal equipment, and two-terminal equipment. According to the node number attribute of the distribution network equipment, the distribution network equipment is added to a node equipment list of the node corresponding to the node number. It should be noted that the distribution network equipment model includes, but is not limited to, node information (mainly including node number, node name, and node type information), two-terminal equipment information (mainly including equipment number, equipment name, equipment type, affiliated feeder, node one number, and node two number, such as line segment, circuit breaker, disconnecting switch, and transformer winding), and single-terminal equipment information (mainly including equipment number, equipment name, equipment type, equipment capacity, affiliated feeder, and node one number), such as load, distributed power source, and capacitor reactor. Among them, the single-terminal equipment is associated with a single equipment node, and the two-terminal equipment is associated with two equipment nodes. The present invention simplifies the power grid model into nodes, single-terminal equipment, and two-terminal equipment. According to the equipment node number, the single-terminal equipment is added to the equipment list of its associated node, and the two-terminal equipment is respectively added to the equipment lists of the two nodes it is associated with, and a node equipment list associated with each node is generated.

[0096] In step 4, a distribution network substation list and a distribution network feeder list are respectively constructed. Each high-voltage side main transformer bus root node of the distribution network substation is stored in an un-searched node list, and a feeder is created for each high-voltage side main transformer bus root node in the un-searched node list in sequence to determine the connection relationship between the distribution network feeder and the distribution network substation.

[0097] In an embodiment of the present invention, the steps of respectively constructing a distribution network substation list and a distribution network feeder list, storing each high-voltage side main transformer bus root node of the distribution network substation in an un-searched node list, creating a feeder for each high-voltage side main transformer bus root node in the un-searched node list in sequence, and determining the connection relationship between the distribution network feeder and the distribution network substation include:

[0098] (1) Set an un-searched node list;

[0099] (2) Create a new feeder, set the current high-voltage side main transformer bus root node of the distribution network substation to belong to this feeder, and set the current root node to be in a live state. Add the feeder to a feeder list of the substation to which the high-voltage side main transformer belongs, and add the current substation to the substation list, and determine that the feeder is connected to the substation to which the current high-voltage side main transformer belongs;

[0100] (3) Judge the nodes in the current un-searched node list. If the current root node is not the last node in the un-searched node list, obtain the next node from the un-searched node list and return to step (1). If the current root node is the last node in the un-searched node list, complete the feeder creation of the high-voltage side main transformer bus root node and determine the connection relationship between the distribution network feeder and the distribution network substation.

[0101] In step 5, starting from the positive direction of the un-searched node list, perform a forward topology search on the distribution network model, and set the feeder to which the device belongs as the feeder to which the current node belongs until the end of the power grid or a switch device with a disconnected tele-signal state is searched, to obtain the connection relationship between the devices and nodes in the distribution network, the connection relationship between nodes and nodes, and the connection relationship between the distribution network devices and the distribution network feeders.

[0102] In an embodiment of the present invention, starting from the positive direction of the un-searched node list, perform a forward topology search on the distribution network model, and set the feeder to which the device belongs as the feeder to which the current node belongs until the end of the power grid or a switch device with a disconnected tele-signal state is searched, to obtain the connection relationship between the devices and nodes in the distribution network, the connection relationship between nodes and nodes, and the connection relationship between the distribution network devices and the distribution network feeders. The process is as Figure 2 shown and includes:

[0103] (1) Judge the un-searched node list. If the un-searched node list is empty, jump to step (5). If the un-searched node list is not empty, set the length of the un-searched node list as NS, and initialize the search node serial number as 1.

[0104] (2) Set the search node counting position node of the un-searched node list as the current node, set the feeder to which the current node belongs as the current feeder, and judge the node device list of the current node. If the node device list of the current node is empty, jump to step (3). If the node device list of the current node is not empty, traverse the node devices in the node device table of the current node and perform the following steps:

[0105] (2-1) Obtain the first node device in the node device list of the current node and set this node device as the current node device.

[0106] (2-2) Judge this current node device. If the current node device has been traversed, jump to step (2-6). If the current node device has not been traversed, perform step (2-3).

[0107] (2-3) Determine that the current node device is connected to the current feeder and determine that the current node device has been traversed.

[0108] (2-4) Determine the type of the current node device. If the type of the current node device is a single-ended device, jump to step (2-6). If the type of the current node device is a double-ended device, obtain the peer node of the double-ended device from the two associated nodes of the double-ended device, and proceed to step (2-5);

[0109] (2-5) Judge the peer node. If the peer node has been traversed, jump to step (2-6). If the peer node has not been traversed, determine that the peer node is connected to the current feeder, and determine that the peer node has been traversed, and determine that the peer node is in a live state. The parent node of the peer node is the current node. Add the peer node to a sub-node list of the current node, add the peer node to the end of the un-searched node list, and proceed to step (2-6);

[0110] (2-6) Judge the node device list of the current node. If the current node device is not the last device in the node device list of the current node, obtain the next device in the node device list of the current node, set the device as the current node device, and return to step (2-2). If the current node device is the last device in the node device list of the current node, continue with step (3);

[0111] (3) Judge the search node serial number. If the search node serial number is less than the length NS of the un-searched node list, increment the search node serial number count by 1, and return to step (2). If the search node serial number is equal to NS, proceed to step (4);

[0112] (4) Remove the first NS traversed nodes from the un-searched node list, and return to step (1);

[0113] (5) The un-searched node list is empty, and the forward topology search ends.

[0114] In step 6, according to the connection relationship between the devices and nodes in the distribution network in step 5, and in accordance with the distribution network device measurement information list in step 1, divide the distribution network into distribution network measurement partitions, allocate the distribution network load devices to each distribution network measurement partition, and determine the distribution network load devices included in the distribution network measurement partitions.

[0115] In an embodiment of the present invention, according to the connection relationship between the devices and nodes in the distribution network in step 5, and in accordance with the distribution network device measurement information list in step 1, divide the distribution network into distribution network measurement partitions, allocate the distribution network load devices to each distribution network measurement partition, and determine the distribution network load devices included in the distribution network measurement partitions, including:

[0116] (1) Obtain a device measurement information in the current device measurement information list;

[0117] (2) Based on the device measurement information in step (1), obtain the distribution network devices corresponding to the device measurement information, construct a distribution network device measurement partition corresponding to the device measurement information, set the power measurement of the distribution network measurement partition to the power of the current device measurement information, and add the distribution network measurement partition to a list of distribution network measurement partitions;

[0118] (3) According to the connection relationship between the devices and nodes in the distribution network, obtain the nodes and the node device list corresponding to the distribution network devices in step (2), and add the load devices in the node device list to a load device list of the current distribution network measurement partition;

[0119] (4) According to the parent-child relationship between the distribution network nodes in the connection relationship between the nodes, obtain the list of child nodes of the nodes corresponding to the distribution network devices, judge the list of child nodes. If the list of child nodes is empty, jump to step (5). If the list of child nodes is not empty, sequentially obtain the device lists of the nodes in the list of child nodes, and add the load devices in the node device list to the load device list of the current measurement partition in step (3);

[0120] (5) Judge the current device measurement information. If the current device measurement information is the last device measurement information in the device measurement information list, end the allocation of the distribution network load devices to each distribution network measurement partition. If the current device measurement information is not the last device measurement information in the device measurement information list, obtain the next device measurement information in the device measurement information list, and return to step (2).

[0121] In step 7, according to the distribution network load devices included in the distribution network measurement partition determined in step 6, distribute the measured power in the distribution network device measurement information in step 1 to each load device in the distribution network measurement partition according to the proportional coefficient between the capacity of each load device in the measurement partition and the total capacity of all load devices in the measurement partition (according to the capacity parameters of each load device, accumulate the capacities of the load devices included in the measurement partition to obtain the total load capacity of the partition, and each load capacity / total partition load capacity is the proportional coefficient), and obtain the power of the load devices in the distribution network measurement partition.

[0122] In an embodiment of the present invention, according to the distribution network load devices included in the distribution network measurement partition determined in step 6, distributing the measured power in the distribution network device measurement information in step 1 to each load device in the distribution network measurement partition according to the proportional coefficient includes:

[0123] (1) Obtain a measurement partition from the list of distribution network measurement partitions;

[0124] (2) Obtain the list of load devices in the first measurement sub-region according to the load devices included in the measurement sub-regions of the distribution network, and calculate the total load capacity of this measurement sub-region. The specific steps are as follows:

[0125] (2-1) Initialize the total load capacity of the measurement sub-region to zero, and obtain a load device from the list of load devices in the measurement sub-region;

[0126] (2-2) Obtain the capacity of the current load device, so that the total load capacity of the measurement sub-region = the total load capacity of the measurement sub-region + the capacity of the current load device;

[0127] (2-3) Judge the list of load devices in the current measurement sub-region. If the current load device is the last load in the list of load devices, jump to step (3). If the current load device is not the last load in the list of load devices, obtain the next load device from the list of load devices, and return to step (2-2);

[0128] (3) According to the list of load devices included in the measurement sub-regions of the distribution network, distribute the power of the measurement sub-regions of the distribution network to the load devices in the measurement sub-regions. The specific steps are as follows:

[0129] (3-1) Obtain a load device from the list of load devices in the measurement sub-region;

[0130] (3-2) Calculate the ratio of the capacity of the current load device to the total load capacity of the measurement sub-region, and distribute the power of the measurement sub-region of the distribution network to the current load device according to this ratio. The power of the current load device = the power of the measurement sub-region × the ratio coefficient;

[0131] (3-3) Judge the current load device. If the current load device is the last load in the list of load devices, the power distribution of the load devices in the current measurement sub-region ends; if the current load device is not the last load in the list of load devices, obtain the next load device in the list of load devices, and return to step (3-2);

[0132] (4) Judge the current measurement sub-region. If the current measurement sub-region is the last measurement sub-region in the list of measurement sub-regions of the distribution network, end the power distribution of each load device in the measurement sub-regions of the distribution network. If the current measurement sub-region is not the last measurement sub-region in the list of measurement sub-regions of the distribution network, obtain the next measurement sub-region in the list of measurement sub-regions of the distribution network, and return to step (2).

[0133] In step 8, construct a feeder load device list for each feeder in the feeder list of the distribution network in step 4. According to the connection relationship between the load devices and the distribution network feeders in the connection relationship between the distribution network devices and the distribution network feeders in step 5, add the load devices to a feeder load device list of the connected feeder respectively.

[0134] In step 9, according to the power of the load equipment in the measurement partition of the distribution network in step 7, the load characteristic proportion parameters of the load equipment in step 2, and the load equipment included in the feeder load equipment list in step 8, a mapping relationship table between the load characteristics and the load power of each distribution network feeder is obtained. The load characteristic with the highest proportion of load power in the mapping relationship table between the load characteristics and the load power of the feeder is the load characteristic of the distribution network feeder.

[0135] In an embodiment of the present invention, according to the power of the load equipment in the measurement partition of the distribution network in step 7, the load characteristic proportion parameters of the load equipment in step 2, and the load equipment included in the feeder load equipment list in step 8, a mapping relationship table between the load characteristics and the load power of each distribution network feeder is obtained. The load characteristic with the highest proportion of load power in the mapping relationship table between the load characteristics and the load power of the feeder is the load characteristic of the distribution network feeder, including:

[0136] (1) Obtain a distribution network feeder from the distribution network feeder list;

[0137] (2) Construct a mapping relationship table between the load characteristics and the load power for this distribution network feeder, and initialize the mapping relationship table between the load characteristics and the load power of the distribution network feeder according to the feeder load equipment list. The specific steps are as follows:

[0138] (2-1) Set a mapping relationship table between the load characteristics and the load power of a distribution network feeder;

[0139] (2-2) Obtain a load equipment from the feeder load equipment list;

[0140] (2-3) Sequentially judge the load characteristics in the mapping relationship table between the load characteristics and the load ratios. If the load characteristic exists in the mapping relationship table between the load characteristics and the load power of this feeder, the initialization of the load power corresponding to this load characteristic in the mapping relationship table between the load characteristics and the load power of this feeder ends. If the load characteristic does not exist in the mapping relationship table between the load characteristics and the load power of this feeder, add this load characteristic to the mapping relationship table between the load characteristics and the load power of this feeder, and initialize the load power corresponding to this load characteristic in the mapping relationship table between the load characteristics and the load power of this feeder to zero;

[0141] (2-4) Judge the current load equipment in step (2-2). If the current load equipment is the last equipment in the feeder load equipment list, jump to step (3). If the current load equipment is not the last equipment in the feeder load equipment list, obtain the next load equipment in the feeder load equipment list and return to step (2-3);

[0142] (3) Calculate the power of each load characteristic in the mapping table of the load characteristics and load power of the distribution network feeder in step (2) according to the load equipment included in the feeder load equipment list of claim 1. The specific steps are as follows:

[0143] (3-1) Obtain a load equipment from the feeder load equipment list;

[0144] (3-2) Obtain a load characteristic and a load ratio of this load equipment according to the mapping relationship between the load ratio and the load characteristic;

[0145] (3-3) Calculate the product of the power of this load equipment and the above load ratio, add the corresponding load power in the mapping table of the load characteristics and load power of the distribution network feeder to this product value, and set the corresponding load power value in the mapping table of the load characteristics and load power of the distribution network feeder to the above added value;

[0146] (3-4) Judge the mapping table of the load characteristics and load ratio of this load equipment. If the mapping relationship between the load ratio and the load characteristic of this load equipment is the last mapping relationship in the mapping table of the load characteristics and load ratio of this load equipment, jump to step (4). If the mapping relationship between the load ratio and the load characteristic of this load equipment is not the last mapping relationship in the mapping table of the load characteristics and load ratio of this load equipment, obtain the next load characteristic and load ratio in the mapping table of the load characteristics and load ratio of the load equipment, and return to step (3-3);

[0147] (4) Judge the current load equipment. If the current load equipment is the last equipment in the feeder load equipment list, jump to step (5). If the current load equipment is not the last equipment in the feeder load equipment list, obtain the next load equipment in the feeder load equipment list, and repeat step (3);

[0148] (5) Sum the load powers in the mapping table of the load characteristics and load power of the distribution network feeder obtained in step (3) to obtain the total load power of this feeder. Calculate the ratio of each load power in the mapping table of the load characteristics and load power of the distribution network feeder to the total load power of this feeder respectively. The load characteristic corresponding to the highest ratio among all the ratios is the load characteristic of this distribution network feeder;

[0149] (6) Judge the current feeder. If the current feeder is not the last feeder in the distribution network feeder list, obtain the next feeder in the distribution network feeder list and repeat step (2). If the current feeder is the last feeder in the distribution network feeder list, obtain the mapping table of the load characteristics and load power of each feeder in the distribution network feeder list and the load characteristics of the distribution network feeder.

[0150] In step 10, according to the connection relationship between the distribution network feeder and the distribution network substation in step 4 and the mapping table of the load characteristics and load power of the distribution network feeder in step 9, obtain the mapping table of the load characteristics and load power of the distribution network substation including the feeder. The load characteristic with the highest proportion of load power in the mapping table of the load characteristics and load power of the distribution network substation is the load characteristic of the distribution network substation.

[0151] In an embodiment of the present invention, according to the connection relationship between the distribution network feeder and the distribution network substation in step 4 and the mapping table of the load characteristics and load power of the distribution network feeder in step 9, obtain the mapping table of the load characteristics and load power of the distribution network substation including the feeder. The load characteristic with the highest proportion of load power in the mapping table of the load characteristics and load power of the distribution network substation is the load characteristic of the distribution network substation, including:

[0152] (1) Obtain a substation from the distribution network substation list;

[0153] (2) Construct a mapping table of the load characteristics and load power for this substation, and initialize the mapping table of the load characteristics and load power for this substation according to the feeder list of the distribution network substation. The specific steps are as follows:

[0154] (2-1) Set a mapping table of the load characteristics and load power of a distribution network substation;

[0155] (2-2) Obtain a feeder from the feeder list of the substation;

[0156] (2-3) Sequentially judge the load characteristics in the mapping table of the load characteristics and load power of the current feeder. If this load characteristic exists in the mapping table of the load characteristics and load power of this substation, the initialization of the load power corresponding to this load characteristic in the mapping table of the load characteristics and load power of this substation ends; if this load characteristic does not exist in the mapping table of the load characteristics and load power of this substation, add this load characteristic to the mapping table of the load characteristics and load power of this substation, and initialize the load power corresponding to this load characteristic in the mapping table of the load characteristics and load power of this substation to zero;

[0157] (2-4) Judge the current feeder in step (2-2). If the current feeder is the last feeder in the feeder list of the current substation, jump to step (3). If the current feeder is not the last feeder in the feeder list of the current substation, obtain the next feeder in the feeder list of the current substation, and return to step (2-3);

[0158] (3) Calculate the power of each load characteristic in the mapping table of the load characteristics and load power of the distribution network substation in step (2) according to the distribution network feeders included in the feeder list of the distribution network substation. The specific steps are as follows:

[0159] (3-1) Obtain a feeder in the feeder list of the substation;

[0160] (3-2) Obtain a load characteristic and load power of the feeder according to the mapping table of the load characteristics and load power of the feeder;

[0161] (3-3) Add the above load power to the corresponding load power in the mapping table of the load characteristics and load power of the substation, and set the corresponding load power value in the mapping table of the load characteristics and load power of the substation to the above added value;

[0162] (3-4) Judge the mapping table of the load characteristics and load power of the feeder. If the mapping relationship of the load characteristics and load power of the feeder is the last mapping relationship in the mapping table of the load characteristics and load power of the feeder, jump to step (4). If the mapping relationship of the load characteristics and load power of the feeder is not the last mapping relationship in the mapping table of the load characteristics and load power of the feeder, obtain the next load characteristic and load power of the mapping table of the load characteristics and load power of the feeder, and repeat step (3-3);

[0163] (4) Judge the current feeder. If the current feeder is the last feeder in the feeder list of the current substation, jump to step (5). If the current feeder is not the last feeder in the feeder list of the current substation, obtain the next feeder in the feeder list of the substation, and repeat step (3);

[0164] (5) Sum the load powers in the mapping table of the load characteristics and load power of the distribution network substation obtained in step (3) to obtain the total load power of the substation. Calculate the ratio of each load power in the mapping table of the load characteristics and load power of the current distribution network substation to the total load power of the substation respectively. The load characteristic corresponding to the highest ratio among all the ratios is the load characteristic of the substation;

[0165] (6) Judge the current substation. If the current substation is not the last substation in the list of distribution network substations, obtain the next substation in the list of distribution network substations, and repeat step (2). If the current substation is the last substation in the list of distribution network substations, obtain the mapping table of the load characteristics and load power of each substation in the list of distribution network substations and the substation load characteristics.

[0166] The method of the present invention is based on the subordinate relationship between the distribution network feeder and the substation, adopts the accurate state estimation method of the distribution network, and calculates the load power of the distribution network; combines the load characteristics of the distribution network and the power supply path of the distribution network load, and uses the weighted method to analyze the distribution of various characteristic loads of the distribution network feeder, and statistically summarizes the classification of substation load characteristics. According to the classification ratio of the load characteristics of the distribution network, the method of the present invention combines the accurate load estimation method of the distribution network under the current situation of low coverage of the distribution network measurement and acquisition, so as to achieve accurate division of the load characteristics of the distribution network feeder and even the substation, and significantly improve the problem of insufficient fineness of the load nature division in the existing distribution network load characteristic classification method, providing more refined data support for advanced applications such as the load portrait of the distribution network.

[0167] An embodiment of the present invention also provides an electronic device, including:

[0168] One or more processors;

[0169] A storage device for storing one or more programs;

[0170] When the one or more programs are executed by the one or more processors, the one or more processors implement the distribution network load characteristic classification method of the embodiment of the present invention.

[0171] An embodiment of the present invention further provides a computer-readable medium, on which a computer program is stored, and when the program is executed by a processor, the distribution network load characteristic classification method of the embodiment of the present invention is implemented.

[0172] It should be noted that in the embodiments of the present invention, the so-called processor may be a central processing unit (CPU), or may also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor, or the processor may also be any conventional processor, etc. The memory can be used to store the computer program and / or modules. By running or executing the computer program and / or modules stored in the memory, and calling the data stored in the memory, the processor can implement various functions of the distribution network load characteristic classification method. The memory mainly includes a program storage area and a data storage area. Among them, the program storage area can store an operating system, application programs required for at least one function (such as a sound playback function, an image playback function, etc.); the data storage area can store the data created by the operating system during the running of the application programs (such as audio data, graphic data, etc.). In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, a storage device of at least one magnetic disk, or a flash device.

[0173] Based on such an understanding, to implement all or part of the processes in the above-mentioned embodiment methods of the present invention, it can also be completed by instructing relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, the steps of the above-mentioned various method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in the form of source code, object code, executable file, or some intermediate form, etc. The computer-readable medium can include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a mobile hard disk, a magnetic disk, an optical disc, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium, etc.

[0174] The above are the embodiments of the present invention, which can be understood and implemented by those of ordinary skill in the art without creative efforts. It should be noted that for those of ordinary skill in the art of this technology, several improvements and refinements can be made without departing from the principle of the present invention, and these improvements and refinements are also regarded as the protection scope of the present invention.

Claims

1. A method for classifying the load characteristics of a distribution network, characterized in that, Including: Step 1: Read the device measurement information in the distribution network. The device measurement information includes device number, device name, and measured power, and add the device measurement information to the distribution network device measurement information list. Step 2: Read the mapping relationship table between the load characteristics and load ratios of the load devices in the distribution network. Step 3: Establish a distribution network device list according to the distribution network model. Step 4: Construct a distribution network substation list and a distribution network feeder list respectively. Store each high-voltage side main transformer bus root node of the distribution network substation in the un-searched node list. Create a feeder for each high-voltage side main transformer bus root node in the un-searched node list in turn, and determine the connection relationship between the distribution network feeder and the distribution network substation. Step 5: Conduct a forward topology search on the distribution network model, and set the feeder to which the device belongs as the feeder to which the current node belongs until the end of the power grid or the switch device with the remote signal status of disconnected is searched, to obtain the connection relationship between the devices and nodes in the distribution network, the connection relationship between nodes and nodes, and the connection relationship between the distribution network devices and the distribution network feeders. Step 6: According to the connection relationship between the devices and nodes in the distribution network in Step 5, and in accordance with the distribution network device measurement information list in Step 1, divide the distribution network into several distribution network measurement zones, allocate the distribution network load devices to each distribution network measurement zone, and determine the distribution network load devices included in the distribution network measurement zone. Step 7: According to the distribution network load devices included in the distribution network measurement zone determined in Step 6, allocate the measured power in the distribution network device measurement information in Step 1 to each load device in the distribution network measurement zone according to the proportional coefficient between the capacity of each load device in the measurement zone and the total capacity of all load devices in the measurement zone, to obtain the load device power in the distribution network measurement zone. Step 8: Construct a feeder load device list for each feeder in the distribution network feeder list in Step 4. According to the connection relationship between the load devices and the distribution network feeders in the connection relationship between the distribution network devices and the distribution network feeders in Step 5, add the load devices to a feeder load device list of the connected feeder respectively. Step 9: According to the load device power in the distribution network measurement zone in Step 7, the load characteristic proportional parameter of the load device in Step 2, and the load devices included in the feeder load device list in Step 8, obtain the mapping relationship table between the load characteristics and load power of each distribution network feeder. The load characteristic with the highest proportion of load power in the mapping relationship table between the load characteristics and load power of the feeder is the load characteristic of the distribution network feeder. Step 10: According to the connection relationship between the distribution network feeder and the distribution network substation in Step 4 and the mapping relationship table between the load characteristics and load power of the distribution network feeder in Step 9, obtain the mapping relationship table between the load characteristics and load power of the distribution network substation including the feeder. The load characteristic with the highest proportion of load power in the mapping relationship table between the load characteristics and load power of the distribution network substation is the load characteristic of the distribution network substation.

2. The load characteristic classification method according to claim 1, characterized in that In step (4), the distribution network substation list and the distribution network feeder list are respectively constructed. Each high-voltage side main transformer bus root node of the distribution network substation is stored in the un-searched node list. Feeders are created for each high-voltage side main transformer bus root node in the un-searched node list in sequence, and the connection relationship between the distribution network feeder and the distribution network substation is determined, including: (1) Set up an un-searched node list; (2) Create a new feeder, set the current high-voltage side main transformer bus root node of the distribution network substation to belong to this feeder, and set the current root node to be in a live state. Add this feeder to a feeder list of the substation to which the high-voltage side main transformer belongs, and add the current substation to the substation list, and determine that this feeder is connected to the substation to which the current high-voltage side main transformer belongs; (3) Judge the nodes in the current un-searched node list. If the current root node is not the last node in the un-searched node list, obtain the next node from the un-searched node list and return to step (1). If the current root node is the last node in the un-searched node list, complete the creation of the feeder for the high-voltage side main transformer bus root node and determine the connection relationship between the distribution network feeder and the distribution network substation.

3. The load characteristic classification method according to claim 1, characterized in that In step (5), the forward topology search is performed on the distribution network model, and the feeder to which the device belongs is set as the feeder to which the current node belongs until the end of the power grid or the switch device with the remote signaling state being off is searched, and the connection relationship between the devices and nodes in the distribution network, the connection relationship between nodes and nodes, and the connection relationship between the distribution network devices and the distribution network feeders are obtained, including: (1) Judge the un-searched node list. If the un-searched node list is empty, jump to step (5). If the un-searched node list is not empty, set the length of the un-searched node list as NS, and initialize the search node serial number as 1; (2) Set the search node counting position node of the un-searched node list as the current node, set the feeder to which the current node belongs as the current feeder, and judge the node device list of the current node. If the node device list of the current node is empty, jump to step (3). If the node device list of the current node is not empty, traverse the node devices in the node device table of the current node and perform the following steps: (2-1) Obtain the first node device in the node device list of the current node and set this node device as the current node device; (2-2) Judge this current node device. If the current node device has been traversed, jump to step (2-6). If the current node device has not been traversed, perform step (2-3); (2-3) Determine that the current node device is connected to the current feeder and determine that the current node device has been traversed; (2-4) Judge the type of the current node device. If the type of the current node device is a single-ended device, jump to step (2-6). If the type of the current node device is a double-ended device, obtain the opposite-end node of the double-ended device from the two associated nodes of the double-ended device and perform step (2-5); (2-5) Judge the peer node. If the peer node has been traversed, jump to step (2-6). If the peer node has not been traversed, determine that the peer node is connected to the current feeder, determine that the peer node has been traversed, determine that the peer node is in a live state, the parent node of the peer node is the current node, add the peer node to a sub-node list of the current node, add the peer node to the end of the list of nodes to be searched, and perform step (2-6); (2-6) Judge the node device list of the current node. If the current node device is not the last device in the node device list of the current node, obtain the next device in the node device list of the current node, set the device as the current node device, and return to step (2-2). If the current node device is the last device in the node device list of the current node, continue with step (3); (3) Judge the search node serial number. If the search node serial number is less than the length NS of the list of nodes to be searched, increment the search node serial number count by 1 and return to step (2). If the search node serial number is equal to NS, perform step (4); (4) Remove the first NS traversed nodes from the list of nodes to be searched and return to step (1); (5) The list of nodes to be searched is empty, and the forward topology search ends.

4. The load characteristic classification method according to claim 1, wherein, In step (6), according to the connection relationship between the devices and nodes in the distribution network in step (5), and in accordance with the list of distribution network device measurement information in step (1), divide the distribution network into distribution network measurement partitions, allocate the distribution network load devices to each distribution network measurement partition, and determine the distribution network load devices included in the distribution network measurement partition, including: (1) Obtain a piece of device measurement information in the current list of device measurement information; (2) According to the device measurement information in step (1), obtain the distribution network device corresponding to the device measurement information, construct a distribution network device measurement partition corresponding to the device measurement information, set the power measurement of the distribution network measurement partition as the power of the current device measurement information, and add the distribution network measurement partition to a list of distribution network measurement partitions; (3) According to the connection relationship between the devices and nodes in the distribution network, obtain the nodes and the node device list corresponding to the distribution network device in step (2), and add the load devices in the node device list to a load device list of the current distribution network measurement partition; (4) According to the parent-child relationship between the distribution network nodes in the connection relationship between the nodes and nodes, obtain the sub-node list of the node corresponding to the distribution network device, judge the sub-node list. If the sub-node list is empty, jump to step (5). If the sub-node list is not empty, sequentially obtain the device lists of the nodes in the sub-node list, and add the load devices in the node device list to the load device list of the current measurement partition in step (3); (5) Judge the current device measurement information. If the current device measurement information is the last one in the device measurement information list, end the allocation of the distribution network load devices to each distribution network measurement area. If the current device measurement information is not the last one in the device measurement information list, obtain the next device measurement information in the device measurement information list, and return to step (2).

5. The load characteristic classification method according to claim 1, characterized in that, In step (7), for the distribution network load devices included in the distribution network measurement area determined according to step (6), allocate the measured power in the distribution network device measurement information in step (1) to each load device in the distribution network measurement area according to the proportional coefficient between the capacity of each load device in the measurement area and the total capacity of all load devices in the measurement area, and obtain the power of the load devices in the distribution network measurement area, including: (1) Obtain a measurement area from the distribution network measurement area list; (2) According to the load devices included in the distribution network measurement area, obtain the list of load devices of the first measurement area quantity, and calculate the total load capacity of this measurement area. The specific steps are as follows: (2-1) Initialize the total load capacity of the measurement area to zero, and obtain a load device from the list of load devices in the measurement area; (2-2) Obtain the capacity of the current load device, so that the total load capacity of the measurement area = the total load capacity of the measurement area + the capacity of the current load device; (2-3) Judge the list of load devices of the current measurement area quantity. If the current load device is the last load in the load device list, jump to step (3). If the current load device is not the last load in the load device list, obtain the next load device from the load device list, and return to step (2-2); (3) According to the list of load devices included in the distribution network measurement area, allocate the power of the distribution network measurement area to the load devices in the measurement area. The specific steps are as follows: (3-1) Obtain a load device from the list of load devices in the measurement area; (3-2) Calculate the ratio of the capacity of the current load device to the total load capacity of the measurement area, and allocate the power of the distribution network measurement area to the current load device according to this ratio. The power of the current load device = the power of the measurement area × the proportional coefficient; (3-3) Judge the current load device. If the current load device is the last load in the load device list, the power allocation of the load devices in the current measurement area ends; if the current load device is not the last load in the load device list, obtain the next load device from the load device list, and return to step (3-2); (4) Judge the current measurement area. If the current measurement area is the last measurement area in the distribution network measurement area list, end the power allocation of each load device in the distribution network measurement area. If the current measurement area is not the last measurement area in the distribution network measurement area list, obtain the next measurement area in the distribution network measurement area list, and return to step (2).

6. The load characteristic classification method according to claim 1, characterized in that, In step (9), according to the load device power of the measured power distribution network partition in step (7), the load characteristic ratio parameter of the load device in step (2), and the load devices included in the feeder load device list in step (8), a mapping relationship table between the load characteristics and load power of each feeder of the power distribution network is obtained. The load characteristic with the highest proportion of load power in the mapping relationship table between the load characteristics and load power of the feeder is the load characteristic of the feeder of the power distribution network, including: (1) Obtain a feeder of the power distribution network from the feeder list of the power distribution network; (2) Construct a mapping relationship table between the load characteristics and load power for this feeder of the power distribution network, and initialize the mapping relationship table between the load characteristics and load power of the feeder of the power distribution network according to the feeder load device list. The specific steps are as follows: (2-1) Set a mapping relationship table between the load characteristics and load power of a feeder of the power distribution network; (2-2) Obtain a load device from the feeder load device list; (2-3) Sequentially judge the load characteristics in the mapping relationship table between the load characteristics and load ratios. If this load characteristic exists in the mapping relationship table between the load characteristics and load power of this feeder, the initialization of the load power corresponding to this load characteristic in the mapping relationship table between the load characteristics and load power of this feeder ends. If this load characteristic does not exist in the mapping relationship table between the load characteristics and load power of this feeder, add this load characteristic to the mapping relationship table between the load characteristics and load power of this feeder, and initialize the load power corresponding to this load characteristic in the mapping relationship table between the load characteristics and load power of this feeder to zero; (2-4) Judge the current load device in step (2-2). If the current load device is the last device in the feeder load device list, jump to step (3). If the current load device is not the last device in the feeder load device list, obtain the next load device in the feeder load device list, and return to step (2-3); (3) According to the load devices included in the feeder load device list in claim 1, calculate the power of each load characteristic in the mapping relationship table between the load characteristics and load power of the feeder of the power distribution network in step (2). The specific steps are as follows: (3-1) Obtain a load device from the feeder load device list; (3-2) According to the mapping relationship between the load ratio and the load characteristic, obtain a load characteristic and a load ratio of this load device; (3-3) Calculate the product of the power of this load device and the above load ratio according to the above load ratio in step (3-2), add the product value to the load power corresponding to it in the mapping relationship table between the load characteristics and load power of the feeder of the power distribution network, and set the corresponding load power value in the mapping relationship table between the load characteristics and load power of the feeder of the power distribution network to the above added value; (3 - 4) Judge the mapping relationship table between the load characteristics and load ratio of the load device. If the mapping relationship between the load ratio and load characteristics of the load device is the last mapping relationship in the mapping relationship table between the load characteristics and load ratio of the load device, jump to step (4). If the mapping relationship between the load ratio and load characteristics of the load device is not the last mapping relationship in the mapping relationship table between the load characteristics and load ratio of the load device, obtain the next load characteristics and load ratio in the mapping relationship table between the load characteristics and load ratio of the load device, and return to step (3 - 3); (4) Judge the current load device. If the current load device is the last device in the feeder load device list, jump to step (5). If the current load device is not the last device in the feeder load device list, obtain the next load device in the feeder load device list, and repeat step (3); (5) Sum the load powers in the mapping relationship table between the load characteristics and load power of the distribution network feeder obtained in step (3) to obtain the total load power of the feeder. Calculate the ratio of each load power in the mapping relationship table between the load characteristics and load power of the distribution network feeder to the total load power of the feeder respectively. The load characteristics corresponding to the highest ratio among all ratios are the load characteristics of the distribution network feeder; (6) Judge the current feeder. If the current feeder is not the last feeder in the distribution network feeder list, obtain the next feeder in the distribution network feeder list, and repeat step (2). If the current feeder is the last feeder in the distribution network feeder list, obtain the mapping relationship tables between the load characteristics and load power of each feeder in the distribution network feeder list and the load characteristics of the distribution network feeder.

7. The load characteristic classification method according to claim 1, characterized in that In step (10), according to the connection relationship between the distribution network feeder and the distribution network substation in step (4) and the mapping relationship table between the load characteristics and load power of the distribution network feeder in step (9), obtain the mapping relationship table between the load characteristics and load power of the distribution network substation including the feeder. The load characteristics with the highest proportion of load power in the mapping relationship table between the load characteristics and load power of the distribution network substation are the load characteristics of the distribution network substation, including: (1) Obtain a substation from the distribution network substation list; (2) Construct a mapping relationship table between the load characteristics and load power for this substation, and initialize the mapping relationship table between the load characteristics and load power of this substation according to the feeder list of the distribution network substation. The specific steps are as follows: (2 - 1) Set a mapping relationship table between the load characteristics and load power of a distribution network substation; (2 - 2) Obtain a feeder from the feeder list of the substation; (2-3) Determine the load characteristics in the mapping table of the load characteristics and load power of the current feeder one by one. If the load characteristic exists in the mapping table of the load characteristics and load power of the substation, the initialization of the load power corresponding to the load characteristic in the mapping table of the load characteristics and load power of the substation ends; if the load characteristic does not exist in the mapping table of the load characteristics and load power of the substation, add the load characteristic to the mapping table of the load characteristics and load power of the substation, and initialize the load power corresponding to the load characteristic in the mapping table of the load characteristics and load power of the substation to zero; (2-4) Determine the current feeder in step (2-2). If the current feeder is the last feeder in the feeder list of the current substation, jump to step (3). If the current feeder is not the last feeder in the feeder list of the current substation, obtain the next feeder in the feeder list of the current substation, and return to step (2-3); (3) Calculate the power of each load characteristic in the mapping table of the load characteristics and load power of the distribution network substation according to the distribution network feeders included in the feeder list of the distribution network substation. The specific steps are as follows: (3-1) Obtain a feeder in the feeder list of the substation; (3-2) According to the mapping table of the load characteristics and load power of the feeder, obtain a load characteristic and load power of the feeder; (3-3) Add the above load power to the load power corresponding to the load characteristic in the mapping table of the load characteristics and load power of the substation, and set the corresponding load power value in the mapping table of the load characteristics and load power of the substation to the above added value; (3-4) Determine the mapping table of the load characteristics and load power of the feeder. If the mapping of the load characteristics and load power of the feeder is the last mapping in the mapping table of the load characteristics and load power of the feeder, jump to step (4). If the mapping of the load characteristics and load power of the feeder is not the last mapping in the mapping table of the load characteristics and load power of the feeder, obtain the next load characteristic and load power in the mapping table of the load characteristics and load power of the feeder, and repeat step (3-3); (4) Determine the current feeder. If the current feeder is the last feeder in the feeder list of the current substation, jump to step (5). If the current feeder is not the last feeder in the feeder list of the current substation, obtain the next feeder in the feeder list of the substation, and repeat step (3); (5) Sum the load powers in the mapping table of the load characteristics and load power of the distribution network substation obtained in step (3) to obtain the total load power of the substation. Calculate the ratio of each load power in the mapping table of the load characteristics and load power of the current distribution network substation to the total load power of the substation respectively. The load characteristic corresponding to the highest ratio among all the ratios is the load characteristic of the substation; (6) Judge the current substation. If the current substation is not the last substation in the list of distribution network substations, obtain the next substation in the list of distribution network substations and repeat step (2). If the current substation is the last substation in the list of distribution network substations, obtain the mapping table between the load characteristics and load power of each substation in the list of distribution network substations and the substation load characteristics.

8. An electronic device, characterized in that, Comprising: One or more processors; A storage device for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors are caused to implement the method according to any one of claims 1-7.

9. A computer-readable medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, the method according to any one of claims 1-7 is implemented.

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