An optimization selection method for the deployment of power dispatching program control system

Abstract

The present invention discloses a method for optimizing the deployment of a power dispatching program-controlled system, comprising the following steps: Step S1, calculating statistics on the site conditions, the number of services, and the number of devices required to carry the services in a target area; when determining the number of devices required to carry the services, based on three carrying modes, respectively calculating the number of dispatching program-controlled switches and the number of dispatching IAD devices required to carry the services; wherein the three carrying modes are respectively a traditional mode, a dispatching mode, and a subnet partitioning mode; Step S2, based on the statistical results obtained in Step S1, determining the optimal carrying mode solution for the target area through calculation and analysis; wherein the dimensions considered when determining the optimal carrying mode solution for the target area through calculation and analysis include at least one of the following: total investment, total number of transmission channels, computer room space occupancy, power resource occupancy, and operation and maintenance difficulty. The adoption of this solution can effectively protect investment and ensure the stable operation of the dispatching switching network.

Description

Technical Field

[0001] The present invention belongs to the technical field of network planning and design of electric power dispatching program control systems, and in particular relates to an optimization selection method for the deployment of electric power dispatching program control systems. Background Art

[0002] In the power system, when formulating the planning scheme for the power dispatching program control system network (referred to as the dispatching exchange network), it is necessary to respond to the dispatching business needs of the power system, select different deployment methods based on the deployment conditions in various regions, and select aggregation nodes based on the requirements of the deployment method, determine the number of deployment nodes and the corresponding equipment configuration.

[0003] Currently, the dispatching program-controlled switching network at each node in the power communication network relies solely on the experience of operations and design personnel to deploy and configure it. This can easily lead to unclear deployment scopes and detailed configurations that are significantly inconsistent with actual conditions. Furthermore, the coordination and matching of various nodes in the existing dispatching program-controlled switching network is insufficient. This results in excessively redundant configuration capacity and card counts at many operational dispatching program-controlled switching network communication sites, as well as insufficient configuration capacity and card counts at many operational dispatching program-controlled switching network communication sites. Therefore, it is necessary to develop a standardized and effective optimization method that can determine a reasonable and optimal power system dispatching program-controlled switching network deployment plan for a specific region. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a method for optimizing the deployment of a power dispatching program-controlled system, addressing the problem that existing dispatching switching network equipment relies solely on experience to configure the number of nodes and equipment capacity, which can easily lead to unclear deployment scope and poor matching and coordination. The present invention proposes three bearer mode solutions. By calculating the number of nodes and equipment capacity of the dispatching switching network and then determining the optimal configuration, it can effectively avoid the situation where the number of nodes and equipment capacity of the dispatching switching network do not match the actual situation, thereby effectively protecting investment and ensuring the stable operation of the dispatching switching network.

[0005] According to the technical solution of the present invention, the present invention provides an optimization selection method for the deployment of a power dispatching program control system, which includes the following steps:

[0006] Step S1, statistics the site conditions, service quantity and number of devices required to carry the services in the target area;

[0007] The site situation refers to the number of sites at each voltage level within the target area. The number of services refers to the number of dispatch telephone lines. The equipment required to carry the services includes dispatch program-controlled switches and dispatch IADs.

[0008] When determining the number of devices required to carry services, the number of dispatching programmable switches and dispatching IADs required to carry services is calculated based on three bearer modes: traditional mode, dispatch mode, and subnet partitioning mode.

[0009] The traditional model is to use the ground dispatcher as the aggregation node to connect the dispatching program-controlled switches and dispatching IAD equipment in the area, and configure the dispatching machine as the access layer equipment at the 220kV site;

[0010] The dispatching mode is to set up dispatching program-controlled switches and dispatching IAD equipment in the convergence area at the dispatching organizations at all levels according to the dispatching relationship;

[0011] The subnet partitioning mode is divided according to the power supply partition of the power grid, and the dispatching machine and dispatching IAD equipment in the convergence area of ​​the aggregation node are selected within the partition;

[0012] Step S2, based on the statistical results obtained in step S1, determining the optimal load-bearing mode solution for the target area through calculation and analysis;

[0013] Among them, the dimensions considered when determining the optimal carrying mode plan for the target area through calculation and analysis include at least one of the total investment, the total number of transmission channels, the space occupancy of the computer room, the power resource occupancy, and the difficulty of operation and maintenance.

[0014] Furthermore, in the traditional mode, 330 / 220kV and above sites are equipped with dispatching program-controlled switching equipment as the primary mode for carrying dispatching calls, 2M relays are connected to the local dispatching, and dispatching IAD equipment is equipped as the backup mode for carrying dispatching calls, and the dispatching program-controlled switching IP board of the local dispatching is responsible for placing numbers on the dispatching IAD equipment; dispatching IAD equipment is equipped at 110 / 66kV sites as the primary / backup mode for carrying dispatching calls, and the dispatching program-controlled switching IP board of the local dispatching is responsible for placing numbers on the dispatching IAD equipment; dispatching IAD equipment is equipped at 35kV sites as the primary mode for carrying dispatching calls, and the dispatching program-controlled switching IP board of the local dispatching is responsible for placing numbers on the dispatching IAD equipment; in the traditional mode, county dispatching and centralized control are only equipped with dispatching desks, and dispatching IAD equipment is used as a replacement for the original PCM equipment;

[0015] In dispatching mode, dispatching program-controlled switching equipment is configured at 750 / 500kV and above sites as the primary mode for carrying dispatching calls, with 2M relays connected to local dispatching, and dispatching IAD equipment is configured for provincial dispatching and local dispatching respectively as the backup mode for carrying dispatching calls, with the dispatching program-controlled switching IP boards of provincial and local dispatching issuing numbers for the dispatching IAD equipment; at 330 / 220kV sites, dispatching IAD equipment is configured for provincial dispatching and local dispatching respectively as the primary / backup mode for carrying dispatching calls, with the dispatching program-controlled switching IP boards of provincial and local dispatching issuing numbers for the dispatching IAD equipment; at 110 / 66kV sites, dispatching IAD equipment is configured for local dispatching and county dispatching respectively as the primary / backup mode for carrying dispatching calls, with the dispatching program-controlled switching IP boards of local and county dispatching issuing numbers for the dispatching IAD equipment; at 35kV sites, dispatching IAD equipment is configured as the primary mode for carrying dispatching calls; in dispatching mode, county dispatching is configured with dispatching program-controlled switching equipment, and centralized control is only configured with dispatching desks, with dispatching IAD equipment serving as a replacement for the original PCM equipment;

[0016] In the subnet partitioning mode, 750 / 500kV and above sites are equipped with dispatching program-controlled switching equipment as the primary mode of carrying dispatching calls, and 2M relays are connected to the aggregation node within the partition to which they belong. Dispatching IAD equipment is configured at the subnet aggregation node as the primary / backup mode of carrying dispatching calls, and the dispatching program-controlled switching equipment IP board of the subnet is used to allocate numbers for the dispatching IAD equipment; dispatching IAD equipment is configured at 330 / 220kV and 110 / 66kV sites as the primary / backup mode of carrying dispatching calls, and the dispatching program-controlled switching equipment IP board of the subnet aggregation node of each partition is used to allocate numbers for the dispatching IAD equipment; dispatching IAD equipment is configured at 35kV sites as the primary mode of carrying dispatching calls; in the subnet partitioning mode, the county dispatching does not configure a dispatching program-controlled switching equipment, and a dispatching program-controlled switching equipment is configured at the subnet partition aggregation point. The dispatching IAD equipment is used as a replacement for the original PCM equipment.

[0017] Furthermore, the network topology of the traditional model is that corresponding dispatching program-controlled switches are configured at provincial dispatching, local dispatching, and sites with voltage levels of 330 / 220kV and above, and dispatching desks are configured at county dispatching and centralized control; corresponding dispatching IAD devices are also configured at sites with voltage levels of 330 / 220kV and above; corresponding dispatching IAD devices are configured at sites with voltage levels below 220kV; the dispatching program-controlled switches of the provincial dispatching are respectively connected to the dispatching program-controlled switches of each local dispatching and the provincial dispatching IAD devices at sites with voltage levels of 330 / 220kV and above; the dispatching program-controlled switches of the local dispatching are respectively connected to the dispatching program-controlled switches of sites with voltage levels of 330 / 220kV and above, the local dispatching IAD devices, and the dispatching IAD devices at sites with voltage levels below 220kV; the equipment required for carrying services at sites of each voltage level is connected to dispatching telephones;

[0018] The network topology of the dispatching mode is as follows: corresponding dispatching program-controlled switches are configured at the provincial, prefectural and county dispatching stations, and a dispatching desk is configured at the centralized control station; the dispatching program-controlled switches of the provincial dispatching station are respectively connected to the dispatching program-controlled switches of each prefectural dispatching station; the dispatching program-controlled switches of the prefectural dispatching station are respectively connected to the dispatching program-controlled switches of each county dispatching station; stations with voltage levels of 750 / 500kV and above are equipped with corresponding dispatching program-controlled switches and dispatching IAD equipment; stations with voltage levels below 750 / 500kV are equipped with corresponding dispatching IAD equipment; each station has at least one dispatching IAD device connected to the dispatching program-controlled switch of the corresponding dispatching center with dispatching business needs; the dispatching program-controlled switches of stations with voltage levels of 750 / 500kV and above are connected to the dispatching program-controlled switches of each prefectural dispatching station; the equipment required for carrying business at stations of each voltage level is connected to the dispatching telephone;

[0019] The network topology of the subnet partitioning mode is as follows: the dispatching program-controlled switching network is divided into several subnets according to the power supply partitions divided by the power grid company, and there are aggregation nodes in the subnets; the provincial dispatching, local dispatching and aggregation nodes are equipped with corresponding dispatching program-controlled switches, and the county dispatching and centralized control are equipped with dispatching desks; the dispatching program-controlled switches of the provincial dispatching are respectively connected to the dispatching program-controlled switches of each local dispatching; the dispatching program-controlled switches of the local dispatching are respectively connected to the dispatching program-controlled switches of each aggregation node; the stations with voltage levels of 750 / 500kV and above are equipped with corresponding dispatching program-controlled switches and dispatching IAD equipment; the stations with voltage levels below 750 / 500kV are equipped with corresponding dispatching IAD equipment; the dispatching IAD equipment of each station is connected to the dispatching program-controlled switch of the aggregation node; the dispatching program-controlled switches of stations with voltage levels of 750 / 500kV and above are connected to the dispatching program-controlled switches of each local dispatching; the equipment required for carrying services at stations of each voltage level is connected to the dispatching telephone.

[0020] Furthermore, in step S2, the dimension considered when determining the optimal carrying mode solution for the target area through calculation and analysis includes total investment; step S2 includes the following step S21;

[0021] Step S21, respectively calculating the total investment under the three bearer modes, specifically including the following contents:

[0022] Based on statistics, we get: the number of sites at each voltage level X i , including, 1000kV site quantity x1, 750 / 500kV site quantity x2, 330 / 220kV site quantity x3, 110 / 66kV site quantity x4, 35kV site quantity x5;

[0023] The number of county surveys is Z;

[0024] The number of subnet partitions K;

[0025] Number of dispatchers at each voltage level m i , including, 1000kV site dispatching machine quantity m1, 750 / 500kV site dispatching machine quantity m2, 330 / 220kV site dispatching machine quantity m3, 110 / 66kV site dispatching machine quantity m4, 35kV site dispatching machine quantity m5;

[0026] Number of IADs at each voltage level n i , including, n1 for the number of IADs at 1000kV sites, n2 for the number of IADs at 750 / 500kV sites, n3 for the number of IADs at 330 / 220kV sites, n4 for the number of IADs at 110 / 66kV sites, and n5 for the number of IADs at 35kV sites;

[0027] Equipment unit price P j， , which includes, the dispatching machine unit price P1, 2M board unit price P2, IP board unit price P3, and dispatching IAD equipment unit price P4;

[0028] The total investment under the traditional model is:

[0029] ;

[0030] The total investment under the dispatch mode is:

[0031] ;

[0032] The total investment in subnet partitioning mode is:

[0033] ;

[0034] Step S22 , respectively calculating the total number of transmission channels under the three bearer modes, specifically includes the following contents.

[0035] Furthermore, the total investment for the three bearer modes is calculated based on typical configurations and equipment unit prices:

[0036] The total investment under the traditional model is:

[0037] , a1=42, a2=42, a3=40, a4=4, a5=2; b1=2, b2=2, b3=1, b4=2, b5=1;

[0038] The total investment under the dispatch mode is:

[0039] , a1=42, a2=42, a3=6, a4=4, a5=2; b1=2, b2=2, b3=3, b4=2, b5=1;

[0040] The total investment in subnet partitioning mode is:

[0041] , a1=42, a2=42, a3=6, a4=4, a5=2; b1=2, b2=2, b3=2, b4=2, b5=1.

[0042] Furthermore, in step S2, the dimension considered when determining the optimal bearer mode solution for the target area through calculation and analysis also includes the total number of transmission channels; step S2 also includes the following step S22;

[0043] Step S22, respectively calculating the total number of transmission channels under the three bearer modes; specifically, the following steps are included:

[0044] Based on statistics, we also found that the number of FE channels required is T1, and the number of 2M channels required is T2;

[0045] The total number of transmission channels in traditional mode is:

[0046] T1= , a1=6, a2=6, a3=5, a4=2, a5=1;

[0047] The total number of transmission channels in scheduling mode is:

[0048] T2= , a1=6, a2=6, a3=3, a4=2, a5=1;

[0049] The total number of transmission channels in subnet partitioning mode is:

[0050] T3= , a1=6, a2=6, a3=2, a4=2, a5=1.

[0051] Furthermore, in step S2, the dimensions considered when determining the optimal bearer mode solution for the target area through calculation and analysis include other dimensions, including at least one of the following: computer room space occupancy, power resource occupancy, and operation and maintenance difficulty. Step S2 also includes the following steps S23 and S24.

[0052] Step S23, combining the results of step S21 and step S22 and considerations of other dimensions, respectively calculating evaluation reference values ​​under the three bearing modes;

[0053] First, weights are set for the corresponding dimensions, including total investment weight i1, total number of transmission channels weight i2, computer room space occupancy weight i3, power resource occupancy weight i4, and operation and maintenance difficulty weight i5.

[0054] Then, define the evaluation coefficients of different dimensions;

[0055] Comparing the total investment under the three models, the evaluation coefficient of the lowest total investment is set as 1. Taking the lowest total investment as the benchmark, the total investment evaluation coefficient j1 under the three models is determined according to the ratio of 0.1 reduction for every additional 1 million yuan.

[0056] Compare the total number of transmission channels under the three modes, set the evaluation coefficient of the lowest total number of transmission channels to 1, and use the lowest total number of transmission channels as the benchmark. Determine the evaluation coefficient j2 of the total number of transmission channels under the three modes at a ratio of 0.1 reduction for every 10 channels added.

[0057] Compare the computer room space occupancy in the three modes, set the evaluation coefficient of the lowest computer room space occupancy as 1, and use the lowest computer room space occupancy as the benchmark. Determine the computer room space occupancy evaluation coefficient j3 for the three modes by reducing the evaluation coefficient by 0.1 for each additional cabinet position.

[0058] Compare the power resource usage in the three modes, set the evaluation coefficient of the lowest power resource usage as 1, and use the lowest power resource usage as the benchmark. Determine the power resource usage evaluation coefficient j4 in the three modes according to the ratio of reducing the power resource evaluation coefficient by 0.1 for every 10A increase.

[0059] Select the difficulty coefficient according to the actual situation, and the value range is 0<j5<1;

[0060] Then, the evaluation reference values ​​under the three load modes are calculated using the following formulas:

[0061] Evaluation reference value S=i1×j1+i2×j2+i3×j3+i4×j4+i5×j5;

[0062] Step S24 , comparing the evaluation reference values ​​under the three bearing modes, wherein the bearing mode corresponding to the maximum value is the preferred bearing mode for the target area.

[0063] Furthermore, the method further includes step S3, based on the bearer mode determined in step S2, further determining the method for selecting the convergence node and the number of convergence nodes of the program-controlled dispatch switching network in the target area; step S3 includes the following steps S31 to S33, which are performed according to the bearer mode determined in step S2;

[0064] Step S31: For the traditional mode, the aggregation node corresponds to the local dispatching node, and the number of aggregation nodes is equal to the number of the local dispatching program-controlled switches;

[0065] Step S32: For the dispatch mode, the aggregation nodes correspond to the local dispatch and the county dispatch. The number of aggregation nodes is equal to the sum of the number of dispatch program-controlled switches of the local dispatch and the number of dispatch program-controlled switches of the county dispatch.

[0066] Step S33, for the subnet partition mode, specifically adopt the following steps S331 to S332 to determine;

[0067] Step S331, selecting a sink node for each subnet;

[0068] The aggregation node is a site with a voltage level of 220kV or above selected within the subnet zone to which it belongs, and the selected site meets at least one of the following conditions:

[0069] 1) Sites with good computer room locations and power supply conditions;

[0070] 2) Reliable sites with optical cable resources;

[0071] 3) Sites with rich transmission resources;

[0072] 4) Nodes where services are concentrated;

[0073] Step S332, determining the number of nodes for each subnet;

[0074] For each subnet, the following steps S3321 and S3322 are included;

[0075] Step S3321: Count the number of sites at each voltage level in the subnet, and then preliminarily select and estimate the number of aggregation nodes;

[0076] Step S3322, based on the result of step S3321, the equipment capacity is calculated according to the subnet partitioning mode to obtain the capacity and number of scheduling program-controlled switch equipment required by the subnet; the obtained number of scheduling program-controlled switch equipment is used as the number of aggregation nodes selected for each subnet partition.

[0077] Furthermore, after step S332, step S333 is further included; step S333 is a service coverage and power supply zone matching check, which specifically includes the following contents:

[0078] According to the number of aggregation nodes and equipment capacity determined in step S332, combined with the power supply zoning, check whether the aggregation nodes in each subnet can carry all the dispatch telephone services in the subnet, and whether there is no overload or underload phenomenon in the aggregation nodes; if so, the verification passes; if not, increase the aggregation nodes or adjust the equipment capacity to meet the service access, and verify again until the verification passes; determine the aggregation nodes and their number based on the plan that passes the verification.

[0079] Furthermore, the verification method of step S333 is as follows: for the actual number of sites X, the number of scheduled IAD devices N, the number of configured IP users M3, the required number of IP boards M2, and the number of aggregation nodes L, the verification pass standard is L≥2, M3≥2×N, N / M2≤64, and X / L≤64 within the same subnet partition.

[0080] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0081] 1. The optimization selection method for the deployment of the electric power dispatching program-controlled system of the present invention proposes three bearer mode schemes according to the dispatching telephone service needs, which can adapt to the specific conditions of various different regions. By calculating the detailed configuration of the number of nodes and equipment capacity in the dispatching switching network, the number of nodes and equipment capacity of the dispatching switching network are calculated to determine the optimal configuration, which can effectively avoid the situation where the number of nodes and equipment capacity of the dispatching switching network are inconsistent with the actual situation, thereby effectively protecting the investment and ensuring the stable operation of the dispatching switching network.

[0082] 2. The optimization selection method for the deployment of the electric power dispatching program-controlled system of the present invention can facilitate the rapid determination of the specific configuration scheme of the dispatching switch and other equipment, greatly improve the compatibility with actual application, effectively protect the initial investment and avoid excessive redundancy, and also help to ensure the demand for increased dispatching telephone business volume in the future. BRIEF DESCRIPTION OF THE DRAWINGS

[0083] Figure 1 It is a flow chart of the method provided by the present invention.

[0084] Figure 2 It is a schematic diagram of a typical network topology structure under the traditional mode of the present invention.

[0085] Figure 3 It is a schematic diagram of a typical network topology structure under the scheduling mode of the present invention.

[0086] Figure 4 It is a schematic diagram of a typical network topology structure under the subnet partitioning mode of the present invention. DETAILED DESCRIPTION

[0087] To overcome the existing method of calculating the number of nodes and equipment capacity of dispatching switching network equipment based solely on experience, which can easily lead to a situation where the number of nodes and equipment capacity of the dispatching switching network is significantly inconsistent with actual conditions, the present invention provides an optimization selection method for the deployment of a power dispatching program-controlled system, which is used to calculate the number of nodes and equipment capacity of the dispatching switching network and optimize the existing network structure. This solution calculates the number of nodes and equipment capacity of the dispatching switching network, effectively avoiding the situation where the number of nodes and equipment capacity of the dispatching switching network are inconsistent with actual conditions, thereby effectively protecting investments and ensuring the stable operation of the dispatching switching network.

[0088] In order to make it easier to understand this solution, in simple terms, my country's power grid dispatching organizations are divided into the following levels, namely, headquarters-level dispatching centers (abbreviated as national dispatching), branch-level dispatching centers (abbreviated as branch dispatching), provincial-level dispatching centers (abbreviated as provincial dispatching), prefecture-level dispatching centers (abbreviated as prefecture-level dispatching), county-level dispatching centers (abbreviated as county dispatching), and centralized control centers (abbreviated as centralized control); dispatching management is carried out in this hierarchical manner. The main purpose of the dispatching exchange network is to form a dedicated telephone network for communication between each level and the site, so that the superior can convey production dispatching instructions to specific sites by telephone, etc. The purpose of the present invention is to achieve: based on the specific dispatching telephone service needs of a certain place, the optimal structural scheme of the dispatching exchange network and the detailed configuration of the number of nodes and equipment capacity therein can be reasonably determined.

[0089] See also Figure 1 The method for optimizing the deployment of a program-controlled electric power dispatching system provided by the present invention includes the following steps (since the deployment of national dispatching and branch dispatching in the dispatching exchange network is relatively simple and single, the following description only considers the provincial level and below and uses prefecture-level cities as units; the relevant content of national dispatching and branch dispatching refers to the relevant regulations, specifications and requirements of the existing network and does not affect the content of this patent):

[0090] Step S1: Based on the demand analysis for power dispatch telephone services, the target area's site status, number of services, and the number of devices required to carry these services are calculated. Site status refers to the number of stations of various voltage levels within the target area. Examples of different voltage levels include 1000kV stations, 750 / 500kV stations, 330 / 220kV stations, 110 / 66kV stations, and 35kV stations. Each voltage level further includes at least one specific site from the source, network, and load categories. "Source" refers to, for example, a power plant (e.g., a thermal power plant, wind farm, or other renewable energy booster station), "network" refers to a power grid substation, and "load" refers to a user station (load station). The number of services refers to the number of dispatch telephone lines. The number of devices required to carry these services can be calculated based on the number of dispatch telephone lines required. Currently, most domestic power system dispatch telephone service-carrying equipment can be categorized into two types: a dispatch program-controlled exchange (abbreviated as a dispatch machine) and a dispatch IAD. This solution uses the "IP user board + IAD" model as an example for detailed description. The equipment required for the bearer service (referred to as bearer equipment) includes a dispatching program-controlled switch and a dispatching IAD device.

[0091] Specifically, step S1 includes the following steps S11 to S13.

[0092] Step S11 , collecting statistics on the sites in the target area, such as shown in Table 1 below (the table is sample data).

[0093] Table 1 Statistics of the number of dispatching stations at all levels

[0094]

[0095] Step S12, counting the number of services (ie, the dispatching telephone lines required to carry the services); specifically includes the following contents.

[0096] Considering the current demand for dispatch telephone services in the domestic power system, the service demand units are: provincial dispatch centers (provincial dispatch centers), municipal dispatch centers (regional dispatch centers), county dispatch centers (county dispatch centers), and centralized control centers (centralized control centers). For example, Table 1 below is a typical service demand table.

[0097] Table 2 Number of dispatch telephones deployed at various dispatch stations at all levels of dispatch agencies

[0098]

[0099] The number of dispatch telephone lines deployed (i.e., the dispatch telephone lines required to carry the business) is determined based on typical configurations and specific local needs (the number of requirements can be modified based on regional differences, and this patent uses conventional requirements as an example). For example, taking the 1000kV station in Table 2 above as an example, each 1000kV station needs to deploy 3 dispatch telephone lines for communicating with the provincial dispatch, 1 dispatch telephone line for communicating with the local dispatch, and 2 dispatch telephone lines for communicating with the centralized control system. In this way, 6 telephone lines need to be deployed at each specific site of the 1000kV station. Combined with the site situation counted in step S11, the number of dispatch telephone lines required for the target area as a whole and the distribution and deployment of these dispatch telephone lines corresponding to each site can be determined.

[0100] Step S13 , based on the three bearer modes, respectively counting the number of scheduled program-controlled switches and the number of scheduled IAD devices required for carrying services; specifically including the following contents.

[0101] First, this solution proposes to divide the dispatch telephone service carrying mode into the following three types: traditional mode, dispatch mode, and subnet partition mode. Typical network topologies under different carrying modes are as follows: Figure 2 、 Figure 3 、 Figure 4 As shown ( Figure 2-4 This is a schematic diagram only. Taking a 1000kV station as an example, the diagram shows only one 1000kV station. In reality, there may be two or more 1000kV stations, all connected as shown and described below. Also, taking a ground dispatch station as an example, the number N in the diagram indicates that there are multiple ground dispatch stations, and the diagram shows only the downstream connection of one ground dispatch station. In reality, all other ground dispatch stations are connected as shown and described below. Dispatching organizations that do not have dispatch telephone carrier equipment must have a dispatch desk connected to the dispatch machine at sites with dispatch machines.

[0102] The traditional model is the most common networking model in current power grid dispatching switching networks. It uses only the local dispatching station as an aggregation node to connect the dispatching program-controlled switches and dispatching IADs within the area. At 220kV stations, dispatching machines are deployed as access layer devices. Specifically, at 330 / 220kV and above stations, a dispatching program-controlled switch (referred to as a dispatching machine) is deployed as the primary mode for carrying dispatching calls (for communication with provincial, local, county, and centralized control systems). A 2M relay connects to the local dispatching station. A dispatching IAD is deployed as a backup mode for carrying dispatching calls (for communication with provincial, local, and centralized control systems). The local dispatching switch IP board allocates calls to the dispatching IAD. At 110 / 66kV stations, a dispatching IAD is deployed as the primary / backup mode for carrying dispatching calls (for communication with local and county dispatching systems). The local dispatching switch IP board allocates calls to the dispatching IAD. At 35kV stations, IAD devices are deployed as the primary mode of carrying dispatch calls (implementing telephone communications for county dispatchers). The IP board of the local dispatch switch issues calls to the IAD devices. In this model, county dispatchers and centralized control systems do not use programmable switches, but only dispatch consoles. The IAD devices serve as replacements for existing PCM equipment.

[0103] In other words, the network topology of the traditional model is that the provincial dispatching, local dispatching and sites with voltage levels of 330 / 220kV and above are all equipped with corresponding dispatching program-controlled switches, and the county dispatching and centralized control are equipped with dispatching desks; the sites with voltage levels of 330 / 220kV and above are also equipped with corresponding dispatching IAD devices (including provincial dispatching dispatching IAD devices and local dispatching dispatching IAD devices); the sites with voltage levels below 220kV (110 / 66kV sites and 35kV sites) are equipped with corresponding dispatching IAD devices, and their number is determined according to needs, for example, 110 / 66kV sites have two dispatching IAD devices; the provincial dispatching program-controlled switches (including the connected The main dispatching program-controlled switch and the backup dispatching program-controlled switch are respectively connected to the dispatching program-controlled switches of each local dispatching station (including the connected main dispatching program-controlled switch and the backup dispatching program-controlled switch) and the provincial dispatching dispatching IAD equipment of the sites with voltage levels of 330 / 220kV and above; the dispatching program-controlled switches of the local dispatching station are respectively connected to the dispatching program-controlled switches of the sites with voltage levels of 330 / 220kV and above, the local dispatching dispatching IAD equipment and the dispatching IAD equipment of the sites with voltage levels below 220kV; the equipment required for carrying services at the sites of each voltage level is connected to the dispatching telephone, and the number and function of the dispatching telephones correspond to the statistical results of step S12 (Table 2) and Figure 2 .

[0104] The dispatching model deploys dispatching program-controlled switches and IADs within the dispatching organization's convergence area at each level of dispatching organization based on dispatching relationships (dispatching telephone call carriers are configured separately for each level of dispatching organization). Specifically, in this model, dispatching program-controlled switches are deployed at 750 / 500kV stations and above as the primary mode for carrying dispatching calls (implementing telephone communications with provincial dispatching, local dispatching, and centralized control), with 2M relays merging to local dispatching. Dispatching IADs are deployed at provincial and local dispatching stations as backup modes for carrying dispatching calls (implementing telephone communications with provincial dispatching, local dispatching, and centralized control), with the provincial and local dispatching program-controlled switch IP boards providing call allocation to the IADs. At 330 / 220kV stations, dispatching IADs are deployed at provincial and local dispatching stations as primary / backup modes for carrying dispatching calls (implementing telephone communications with provincial dispatching, local dispatching, county dispatching, and centralized control), with the provincial and local dispatching program-controlled switch IP boards providing call allocation to the IADs. At 110 / 66kV stations, IADs are deployed for both local and county dispatches as the primary / backup mode for dispatch calls (implementing telephone communications with local, county, and centralized control). The IP boards of the local and county dispatchers' programmable switchboards allocate calls to the IADs. At 35kV stations, IADs are deployed as the primary mode for dispatch calls (implementing telephone communications with county dispatchers). In this model, county dispatchers deploy programmable switchboards, with the IADs serving as replacements for existing PCM equipment. Central control only deploys dispatch consoles.

[0105] In other words, the network topology of the dispatching mode is that the provincial dispatching, prefectural dispatching and county dispatching are all equipped with corresponding dispatching program-controlled switches (including the connected main dispatching program-controlled switches and backup dispatching program-controlled switches); the dispatching program-controlled switches of the provincial dispatching are respectively connected to the dispatching program-controlled switches of each prefectural dispatching; the dispatching program-controlled switches of the prefectural dispatching are respectively connected to the dispatching program-controlled switches of each county dispatching (the main dispatching program-controlled switches of the prefectural dispatching are connected to the main dispatching program-controlled switches of the county dispatching, and the backup dispatching program-controlled switches of the prefectural dispatching are connected to the backup dispatching program-controlled switches of the county dispatching); the stations with voltage levels of 750 / 500kV and above are all equipped with corresponding dispatching program-controlled switches and dispatching program-controlled switches. IAD equipment; corresponding dispatching IAD equipment is configured at sites with voltage levels lower than 750 / 500kV (330 / 220kV sites, 110 / 66kV sites and 35kV sites), and its number is determined according to needs; each site has at least one dispatching IAD device connected to the dispatching program-controlled switch of the corresponding dispatching center with dispatching business needs; the dispatching program-controlled switches of sites with voltage levels of 750 / 500kV and above are connected to the dispatching program-controlled switches of each local dispatching center; the equipment required for carrying business at sites of each voltage level is connected to the dispatching telephone, and the number and function of the dispatching telephone correspond to the statistical results of step S12 (Table 2) and Figure 3 .

[0106] The subnet partitioning model divides the power grid into several subnets, selecting dispatch machines and IADs within the convergence node within each subnet. Specifically, in this model, dispatch programmable switching equipment (PSXs) are deployed at 750 / 500kV and above sites as the primary mode for carrying dispatch calls (enabling telephone communications with provincial, local, and centralized control systems). 2M relays are used to converge to the convergence node within the subnet. Dispatching IADs are deployed at the subnet convergence node as the primary / backup mode for carrying dispatch calls (enabling telephone communications with provincial, local, and centralized control systems). The dispatch programmable switching equipment IP board in the subnet allocates calls to the IADs. Dispatching IADs are deployed at 330 / 220kV and 110 / 66kV sites as the primary / backup mode for carrying dispatch calls (enabling telephone communications with provincial, local, and county dispatches, and centralized control systems). The dispatch programmable switching equipment IP board at the convergence node within each subnet allocates calls to the IADs. Dispatching IAD equipment is deployed at 35kV sites as the primary mode for carrying dispatching calls (implementing telephone communications for county dispatching). In this model, county dispatching and centralized control do not have dispatching program-controlled switches, but only dispatching consoles. Dispatching program-controlled switches are deployed at subnet zone aggregation points, and the dispatching IAD equipment serves as a replacement for the original PCM equipment.

[0107] In other words, the network topology of the subnet partitioning mode is that the dispatching program-controlled switching network is divided into several subnets according to the power supply partitions divided by the power grid company, and there are aggregation nodes in the subnets; the provincial dispatching, local dispatching and aggregation nodes are equipped with corresponding dispatching program-controlled switches (including the connected main dispatching program-controlled switches and backup dispatching program-controlled switches); the dispatching program-controlled switches of the provincial dispatching are respectively connected to the dispatching program-controlled switches of each local dispatching; the dispatching program-controlled switches of the local dispatching are respectively connected to the dispatching program-controlled switches of each aggregation node (the main dispatching program-controlled switch of the local dispatching is connected to the main dispatching program-controlled switch of the aggregation node, and the backup dispatching program-controlled switch of the local dispatching is connected to the backup dispatching program-controlled switch of the aggregation node); when the voltage level is All sites with voltage levels of 750 / 500kV and above are equipped with corresponding dispatching program-controlled switches and dispatching IAD devices; sites with voltage levels lower than 750 / 500kV (330 / 220kV sites, 110 / 66kV sites, and 35kV sites) are equipped with corresponding dispatching IAD devices, the number of which is determined according to needs; the dispatching IAD devices at each site are connected to the dispatching program-controlled switches at the aggregation node; the dispatching program-controlled switches at sites with voltage levels of 750 / 500kV and above are connected to the dispatching program-controlled switches of each local dispatch station; the equipment required for carrying services at sites of each voltage level is connected to dispatching telephones, and the number and function of the dispatching telephones correspond to the statistical results of step S12 (Table 2) and Figure 4 .

[0108] Furthermore, the number of devices required under different bearer modes is shown in Table 3, Table 4, and Table 5 below:

[0109] Table 3 Number of bearer devices required in traditional mode

[0110]

[0111] Table 4 Required number of bearer devices under scheduling mode

[0112]

[0113] Table 5 Required number of bearer devices in subnet partitioning mode

[0114]

[0115] By combining the statistical results of step S11 and step S12, it is possible to determine the number of scheduling programmable switches (including the main component boards: the number of 2M boards and IP boards) and the number of scheduling IAD devices required for the target area as a whole when the above three bearing modes are adopted respectively, as well as the deployment plan of these devices (that is, the network topology structure under the three bearing modes based on the site conditions in the target area).

[0116] Step S2: Based on the statistical results obtained in step S1, the optimal bearer model solution for the target region is determined through calculation and analysis. Based on business demand statistics (as shown in the aforementioned statistical table) and the known number of sites at each voltage level in the target region, different bearer models are substituted. The selected network topology can be further determined based on various indicators and dimensions, and the number of required aggregation nodes can be calculated. Specific considerations for determining the selected network topology based on various indicators and dimensions include, for example, investment status, transmission resource availability, and other dimensions.

[0117] Specifically, step S2 includes the following steps S21 to S24.

[0118] Step S21 , respectively calculating the total investment under the three bearing modes; specifically including the following contents.

[0119] Taking the provincial company as an example, the variables required to calculate equipment investment include: (The following calculation method is based on prefecture-level cities only. In actual application, the total investment at the provincial company level is the sum of all prefecture-level cities within the provincial company):

[0120] Number of sites at each voltage level X i , including, 1000kV site quantity x1, 750 / 500kV site quantity x2, 330 / 220kV site quantity x3, 110 / 66kV site quantity x4, 35kV site quantity x5;

[0121] The number of county surveys is Z;

[0122] The number of subnet partitions K;

[0123] Number of dispatchers at each voltage level m i , including, 1000kV site dispatching machine quantity m1, 750 / 500kV site dispatching machine quantity m2, 330 / 220kV site dispatching machine quantity m3, 110 / 66kV site dispatching machine quantity m4, 35kV site dispatching machine quantity m5;

[0124] Number of IADs at each voltage level n i , including, n1 for the number of IADs at 1000kV sites, n2 for the number of IADs at 750 / 500kV sites, n3 for the number of IADs at 330 / 220kV sites, n4 for the number of IADs at 110 / 66kV sites, and n5 for the number of IADs at 35kV sites;

[0125] Equipment unit price P j， , which includes, the dispatching machine unit price P1, 2M board unit price P2, IP board unit price P3, and dispatching IAD equipment unit price P4;

[0126] (1) The calculation formula of the total investment of the traditional model is:

[0127] Multiplying the number of sites by the number of typical bearer devices configured in this mode and adding them together yields the following variables:

[0128] Required number of dispatch machines ;

[0129] The number of 2M boards required is M1=M×4;

[0130] The number of IP boards required is M2 = N ÷ 64 × 2 (M2 is a positive integer. If it is less than 1, it is rounded up. Otherwise, it is rounded up).

[0131] Number of scheduled IAD devices ;

[0132] The total price of the dispatching machine, 2M board, IP board, and dispatching IAD is used as the basis for investment calculation;

[0133] It can be concluded that the total investment under the traditional model is:

[0134] ;

[0135] Considering that in actual applications, the unit price of equipment and the number of dispatchers and IADs at each voltage level are fixed constants, they can be substituted into Table 3. Furthermore, the unit price of equipment can also be treated as a constant, for example, P1=30, P2=2, P3=8, and P4=2 (unit: 10,000 yuan). (The equipment quantity refers to a typical configuration, and the unit price of equipment refers to the current market price.)

[0136] Based on the typical configuration and equipment unit price, it can be concluded that when m is known i 、n i 、P j When F1 corresponds to X i Function:

[0137] ;

[0138] Among them, a i and b i To calculate the coefficients, a1=42, a2=42, a3=40, a4=4, a5=2; b1=2, b2=2, b3=1, b4=2, b5=1.

[0139] (2) The calculation formula for the total investment of the dispatching mode is:

[0140] Multiplying the number of sites by the number of typical bearer devices configured in this mode and adding them together yields the following variables:

[0141] Required number of dispatch machines ;

[0142] The number of 2M boards required is M1 = M × 4 + Z × 2 × 3;

[0143] The number of IP boards required is M2 = N ÷ 64 × 2 (M2 is a positive integer. If it is less than 1, it is rounded up. Otherwise, it is rounded up).

[0144] Number of scheduled IAD devices ;

[0145] The total price of the dispatching machine, 2M board, IP board, and dispatching IAD is used as the basis for investment calculation;

[0146] It can be concluded that the total investment in the scheduling mode is:

[0147] ;

[0148] Considering that in actual applications, the unit price of equipment and the number of dispatchers and IADs at each voltage level are fixed constants, they can be substituted into Table 4. Furthermore, the unit price of equipment can also be treated as a constant, setting P1=30, P2=2, P3=8, and P4=2 (unit: 10,000 yuan). (The equipment quantity refers to a typical configuration, and the unit price of equipment refers to the current market price.)

[0149] From this we can conclude that when m is known i 、n i 、P j When F2 corresponds to X i Function:

[0150] ;

[0151] Among them, a i and b i To calculate the coefficients, a1=42, a2=42, a3=6, a4=4, a5=2; b1=2, b2=2, b3=3, b4=2, b5=1.

[0152] (3) The calculation formula for the total investment of the subnet partitioning model is:

[0153] Multiplying the number of sites by the number of typical bearer devices configured in this mode and adding them together yields the following variables:

[0154] Required number of dispatch machines ;

[0155] The number of 2M boards required is M1 = M × 4 + K × 2 × 3;

[0156] The number of IP boards required is M2 = N ÷ 64 × 2 (M2 is a positive integer. If it is less than 1, it is rounded up. Otherwise, it is rounded up).

[0157] Number of scheduled IAD devices ;

[0158] The total price of the dispatching machine, 2M board, IP board, and dispatching IAD is used as the basis for investment calculation;

[0159] It can be concluded that the total investment in the subnet partitioning mode is:

[0160] ;

[0161] Considering that in actual applications, the unit price of equipment and the number of dispatchers and IADs at each voltage level are fixed constants, they can be substituted into Table 5. Furthermore, the unit price of equipment can also be treated as a constant, setting P1=30, P2=2, P3=8, and P4=2 (unit: 10,000 yuan). (The equipment quantity refers to a typical configuration, and the unit price of equipment refers to the current market price.)

[0162] From this we can conclude that when m is known i 、n i 、P j When F3 corresponds to X i Function:

[0163] ;

[0164] Among them, a i and b i To calculate the coefficients, a1=42, a2=42, a3=6, a4=4, a5=2; b1=2, b2=2, b3=2, b4=2, b5=1.

[0165] The above formula can be used to calculate the total investment under different carrier models for the target region (with the same provincial company size). In some embodiments, the carrier model can be selected based on the principle of minimum total investment.

[0166] Step S22, respectively calculating the total number of transmission channels under the three bearer modes; specifically including the following contents.

[0167] Referring to the current situation in most domestic power systems, the IAD service bearer network is the MSTP channel (FE channel for short) for transmitting SDH equipment, and the dispatcher's service bearer network is the 2M channel for transmitting SDH equipment. Given the number of sites at each voltage level in the target area, the number of required transmission channels can be calculated by substituting different bearer modes.

[0168] Taking the provincial company as an example, the new variables required based on the previous steps are as follows (the following calculation method is based on prefecture-level cities only. In actual application, the total number of channels required at the provincial company level should be added up for all prefecture-level cities):

[0169] The number of 2M channels required is T1, and the number of FE channels required is T2; each scheduling IAD requires one FE channel, and the number of 2M channels required by each scheduling machine is equal to the number of 2M boards.

[0170] (1) The calculation formula for the total number of transmission channels in the traditional mode is:

[0171] T1=2M board quantity= ,

[0172] T2 = Number of scheduled IADs = ;

[0173] Among them, considering that the number of dispatchers and IADs at each voltage level is a fixed constant in actual application, it can be substituted into Table 3; sort out the effects of T1 and T2 on X i The function is as follows:

[0174] , where a1=1, a2=1, a3=1, a4=0, a5=0;

[0175] , where a1=2, a2=2, a3=1, a4=2, a5=1;

[0176] In actual applications, T2 will affect the project investment according to the actual situation. The investment column can be superimposed and compared with the investment in the previous step according to the situation. This patent does not provide a detailed description.

[0177] To quantify the actual significance of channel requirements for comparison, the total occupied channel bandwidth can be used as a comparison dimension. The bandwidth occupied by 2M channels and FE channels is both 2Mbit / s.

[0178] It can be concluded that the total number of transmission channels in the traditional mode is:

[0179] T1=T1+T2= , where a1=6, a2=6, a3=5, a4=2, a5=1.

[0180] (2) The calculation formula for the total number of transmission channels in the scheduling mode is:

[0181] T1=2M board quantity= ;

[0182] T2 = Number of scheduled IADs = ;

[0183] Among them, considering that the number of dispatchers and IADs at each voltage level is a fixed constant in actual application, it can be substituted into Table 4; sort out the effects of T1 and T2 on X i The function is as follows:

[0184] , where a1=1, a2=1, a3=0, a4=0, a5=0;

[0185] , where a1=2, a2=2, a3=3, a4=2, a5=1;

[0186] In actual applications, T2 will affect the project investment according to the actual situation. The investment column can be superimposed and compared with the investment in the previous step according to the situation. This patent does not provide a detailed description.

[0187] To quantify the actual significance of channel requirements for comparison, the total occupied channel bandwidth can be used as a comparison dimension. The bandwidth occupied by 2M channels and FE channels is both 2Mbit / s.

[0188] It can be concluded that the total number of transmission channels in scheduling mode is:

[0189] T2=T1+T2= , where a1=6, a2=6, a3=3, a4=2, and a5=1.

[0190] (3) The calculation formula for the total number of transmission channels in the subnet partitioning mode is:

[0191] T1=2M board quantity= ,

[0192] T2 = Number of scheduled IADs = ;

[0193] Among them, considering that the number of dispatchers and IADs at each voltage level is a fixed constant in actual application, it can be substituted into Table 5; sort out the effects of T1 and T2 on X i The function is as follows:

[0194] , where a1=1, a2=1, a3=0, a4=0, a5=0;

[0195] , where a1=2, a2=2, a3=2, a4=2, a5=1;

[0196] In actual applications, T2 will affect the project investment according to the actual situation. The investment column can be superimposed and compared with the investment in the previous step according to the situation. This patent does not provide a detailed description.

[0197] To quantify the actual significance of channel requirements for comparison, the total occupied channel bandwidth can be used as a comparison dimension. The bandwidth occupied by 2M channels and FE channels is both 2Mbit / s.

[0198] It can be concluded that the total number of transmission channels in the subnet partitioning mode is:

[0199] T3=T1+T2= , where a1=6, a2=6, a3=2, a4=2, a5=1.

[0200] The above formula can be used to calculate the transmission equipment channel resource usage under different bearer modes in the target region (within the same provincial company size). In some embodiments, the bearer mode can be selected based on the principle of minimum resource usage (minimum number of total transmission channels).

[0201] Step S23, comprehensively considering the results of step S21 and step S22 and other dimensions, calculate the evaluation reference values ​​under the three bearing modes respectively. In other words, on the basis of considering the optimal bearing mode from the dimensions of investment and resource occupation, it is preferred to also comprehensively consider other dimensions such as computer room and power supply basic resource occupation to select the optimal bearing mode. The other dimensions include at least one of the computer room space occupation, power supply resource occupation, and operation and maintenance difficulty. For example, the other dimensions may only include the computer room space occupation.

[0202] First, set the weights for the corresponding dimensions, as shown in the following table:

[0203]

[0204] The selection of weights can be set according to the specific project. This patent recommends the following weights:

[0205]

[0206] Then, the evaluation coefficients of different dimensions are defined.

[0207] a. The total investment evaluation coefficient is determined according to the following principles:

[0208] Comparing the total investment under the three models, the evaluation coefficient of the lowest total investment is set as 1. Taking the lowest total investment as the benchmark, the total investment evaluation coefficient j1 under the three models is determined at a ratio of 0.1 reduction for every additional 1 million yuan.

[0209] b. The evaluation coefficient of the total number of transmission channels is determined according to the following principles:

[0210] Comparing the total number of transmission channels under the three modes, the evaluation coefficient of the lowest total number of transmission channels is set to 1. Taking the lowest total number of transmission channels as the benchmark, the evaluation coefficient j2 of the total number of transmission channels under the three modes is determined at a ratio of reducing the evaluation coefficient by 0.1 for every 10 channels added.

[0211] c. The computer room space occupancy evaluation coefficient is determined according to the following principles:

[0212] Comparing the computer room space occupancy under the three modes, the lowest computer room space occupancy evaluation coefficient is set to 1. Using the lowest computer room space occupancy as the benchmark, the computer room space occupancy evaluation coefficient j3 for each additional cabinet position is reduced by 0.1. (The computer room space occupancy is determined based on the number of devices and channels, which can be achieved using existing technical means. This is not the focus of the present invention and will not be elaborated on here.)

[0213] d. The power resource occupancy evaluation coefficient is determined according to the following principles:

[0214] Comparing the power resource utilization in the three modes, the lowest power resource utilization evaluation coefficient is set to 1. Using the lowest power resource utilization as the benchmark, the power resource utilization evaluation coefficient j4 for each mode is determined by decreasing the power resource utilization evaluation coefficient by 0.1 for every 10A increase in power resource utilization. (Power resource utilization is determined based on the number of devices and channels, and can be achieved using existing technical means. This is not the focus of the present invention and will not be elaborated on here.)

[0215] e. The operation and maintenance difficulty evaluation coefficient is determined according to the following principles:

[0216] The difficulty coefficient is selected based on actual conditions, with a value range of 0 < j5 < 1. For example, in the traditional model, when there are many sites and equipment, the operation and maintenance difficulty will be very high, so the operation and maintenance difficulty evaluation coefficient is set to a low value. In another example, when there are only a few sites, the operation and maintenance difficulty of the traditional model may be the lowest, so the operation and maintenance difficulty evaluation coefficient is set to a high value. In another example, in the dispatch model, due to the direct correspondence between dispatch calls and business, the operation and maintenance difficulty is relatively low, so the operation and maintenance difficulty evaluation coefficient is set to a high value.

[0217] Then, the evaluation reference values ​​under the three load modes are calculated using the following formulas:

[0218] Evaluation reference value S=i1×j1+i2×j2+i3×j3+i4×j4+i5×j5.

[0219] Step S24 , comparing the evaluation reference values ​​under the three bearing modes, wherein the bearing mode corresponding to the maximum value is the preferred bearing mode for the target area.

[0220] Step S3, based on the carrying mode and basic network topology determined in step S2, further determine the aggregation node selection method and the number of aggregation nodes of the program-controlled dispatching switching network in the target area; thus, a specific structural plan of the preferred program-controlled dispatching switching network based on the specific conditions of the target area is obtained.

[0221] More specifically, step S3 includes the following steps S31 to S33 , which are performed according to the bearer mode determined in step S2 .

[0222] In step S31, for the traditional mode, the convergence node corresponds to the local dispatching node, and the number of convergence nodes is equal to the number of the local dispatching program-controlled switches (the main and backup switches are counted as two). In the traditional mode, the convergence node is directly determined and does not require calculation.

[0223] In step S32, for dispatch mode, the convergence nodes correspond to the local dispatch and the county dispatch. The number of convergence nodes is equal to the sum of the number of dispatch program-controlled switches (primary and backup are counted as two) for the local dispatch and the number of dispatch program-controlled switches (primary and backup are counted as two) for the county dispatch. In dispatch mode, the convergence nodes are directly determined and do not require calculation.

[0224] Step S33: For the subnet partitioning mode, the following steps S331 to S332 are specifically used to determine.

[0225] Step S331: Select a convergence node. According to the current circuit switching architecture of the provincial power dispatching exchange network, nodes include: the provincial company convergence exchange center (C3), the municipal company convergence exchange center (C4), the convergence exchange station, and the terminal exchange station (T). Core nodes are selected at the primary and backup dispatching stations or secondary convergence points of each municipal company. "Second convergence point" is a prior art term and a specialized term in this field, referring to the second convergence point in the dispatching exchange network.

[0226] For the aggregation nodes of subnet partitions in various cities, it is recommended to select sites with voltage levels of 220kV or above within the subnet partitions to which they belong. The specific conditions are as follows. The selected sites must meet at least one of the following conditions:

[0227] 1) Prefer sites with good equipment room locations and power supply conditions;

[0228] 2) Reliable sites with optical cable resources;

[0229] 3) Sites with rich transmission resources;

[0230] 4) Nodes / sites where services such as source / load stations and centralized control centers are concentrated.

[0231] Step S332, determine the number of nodes:

[0232] (1) Step S3321: Count the number of sites at each voltage level in the subnet, and then preliminarily select and estimate the number of aggregation nodes. Specifically, count the number of sites at each level based on the regional funding situation (as shown in Table 6, where sample data is filled in for a certain subnet A; this Table 6 is equivalent to further subdividing the subnets and specific sites based on Table 1). Based on this (in the specific case of Table 6), select and estimate the number of aggregation nodes according to the principles of step S331.

[0233] Table 6 Statistics of number of sites

[0234]

[0235] Based on Table 5 (the required number of bearer devices under the subnet partitioning mode), the bearer device configuration principles are determined and the following Table 7 is obtained (the table contains sample data and only shows subnet A. In practice, this statistics is also performed on other subnets in the target area).

[0236] Table 7 Equipment demand statistics

[0237]

[0238] (2) Step S3322: Determine the equipment configuration requirements. Specifically, based on the results of step S3321 (Tables 6 and 7), perform equipment capacity calculations according to the subnet partitioning mode (e.g., as shown in Table 8 below, which is an example), and determine the capacity and number of scheduling program-controlled switch devices required for each subnet. The obtained number of scheduling program-controlled switch devices is used as the number of aggregation nodes selected for each subnet partition.

[0239] Table 8 Equipment Capacity Calculation Table

[0240]

[0241] For example, in the embodiment shown in Table 8 above, the total occupied time slots are calculated to be 960, and a 512-line dispatcher can be selected. 960 is divided by 512 and rounded to 2. In this way, the device configuration is calculated to be 2 sets of 512-line dispatchers, which proves that 2 sets of dispatchers are needed to carry the business in the subnet, that is, two aggregation nodes are needed.

[0242] Preferably, step S333 is further included after step S332. Step S333 is a service coverage and power supply partition matching verification, which specifically includes the following contents. Based on the number of aggregation nodes and equipment capacity preliminarily determined in step S332, combined with the power supply partition (subnet), the aggregation nodes in each power supply partition (subnet) are verified to see whether they can carry all dispatch telephone services in the power supply partition (subnet) and whether there is no overload or underload phenomenon of the aggregation nodes; if so, the verification passes; if not, network aggregation nodes are added or equipment capacity is adjusted to meet service access requirements, and verification is performed again until all services can be carried (until verification passes); the aggregation nodes and their number are determined based on the solution that passes verification.

[0243] The verification method is as follows: Given the actual number of sites (X), the number of dispatching IAD devices (N), the number of configured IP users (M3), the number of required IP boards (M2), and the number of aggregation nodes (L), it is recommended that within the same subnet partition, L ≥ 2, M3 ≥ 2 × N, N / M2 ≤ 64, and X / L ≤ 64. The relationship and ratio between these quantities can be flexibly verified based on the actual situation in different regions, taking into account service coverage, redundancy, and bearer security. As a supplementary note, since nodes require active / standby redundancy, at least two are required, so L must be greater than 1. Aggregation nodes must be configured in pairs, so L ≥ 2 is required. The number of configured IP users must be greater than the actual number of voice channels, ideally twice. For redundancy, one backup is used, so M3 ≥ 2 × N is required. An IP board typically has 128 channels. Considering the need for "the number of configured IP users must be greater than the actual number of voice channels, ideally twice," only 64 channels on an IP board are used, with the remaining channels remaining as backups. Similarly, each pair of aggregation nodes should ideally carry no more than 64 sites' worth of telephone services, thus requiring N / M2 ≤ 64. The maximum capacity of a service board in MSTP is 64 channels, so the channel usage should be proportionate to this. Considering the aforementioned equipment characteristics and security considerations, it is recommended that each pair of aggregation nodes carry no more than 128 sites, and that a single point no more than 64 sites.

[0244] The following is a typical case to further illustrate the steps and effects of this method.

[0245] Taking a specific prefecture-level city as an example, the aforementioned calculations indicate that the subnet partitioning model is the optimal transmission method. According to the primary power system plan, the communication network in this target region is divided into three subnets: Northwest, Central and South, and East. Taking into account fiber optic cable resources, transmission resources, dispatching site density, and OTN equipment deployment, a preliminary estimate suggests that two aggregation nodes are required for a specific subnet in this target region. Given the abundance of transmission resources, two 220kV sites were selected as dispatching telephone number placement points. Fill in the site quantity statistics in Table 6, as shown in Subnet A above.

[0246] Dispatching program-controlled switches are deployed at provincial dispatching and backup dispatching / secondary convergence points, local dispatching and backup dispatching / secondary convergence points, and convergence nodes. Convergence nodes connect IAD devices within their respective subnets / aggregation areas and provide IP number allocation for all substations at all levels via IP user boards. Dispatching switches are not deployed except at sites 500 kV and above. IAD devices are configured based on required telephone needs. Using the above principles, determine the equipment quantity for each site, as shown in Table 7. Substituting the above principles into Table 8, calculate the equipment configuration and number of convergence points.

[0247] Calculations show that a given subnet site requires two 512-line dispatchers and two aggregation nodes. Substituting the service coverage and power supply zone matching formulas: L = 2 ≥ 2, M3 = 512 ≥ 2 × N = 432, N / M2 = 54 ≤ 64, X / L = 64 ≤ 64. Therefore, it can be concluded that two aggregation nodes can support dispatch telephone services for all sites within the subnet.

[0248] After determining the method for selecting the aggregation nodes and the number of aggregation nodes, the network topology of the scheduling program-controlled switching network is determined. The subsequent work is to select the specific equipment model, manufacturer, etc., which can be carried out as needed, for example, it also includes the following content.

[0249] Based on the comparison table of the main brands and models of the current mainstream dispatching machine hosts in the market, we can summarize the general dispatching and equipment typical configuration table and the configuration calculation method of various user boards, see Table 9 below.

[0250] Table 9 Typical configuration and board configuration calculation table

[0251]

[0252] It should be noted that Table 8 is intended for calculating the required number of devices for a dispatching machine, specifically the overall configuration (actually two sets) based on the required number of devices. Table 9 shows the configuration for a single set, intended to illustrate the detailed configuration calculation method for a specific device. The greatest common denominator of the calculation is the number of devices required, calculated by the number of slots and the number of lines (capacity). For example, if a dispatching machine has a capacity of 512 lines and 16 slots, and the calculated slot requirement is 17 (requiring two sets) and the required capacity is 500 lines (requiring one set), then two 512-line dispatching machines are required.

[0253] As a supplementary note, the previous article only mentioned IP boards and 2M boards because these two items vary based on the number of sites when calculating investment and are the primary factors influencing investment. The additional items in this table are all other components within the dispatching program-controlled switch. These components are not affected by the number of sites and have a nearly fixed configuration (or may be affected by other factors and have no specific pattern). The multi-function user board provides basic functional services (such as network management and phone ringing) for the dispatching machine. When configuring, each sub-frame requires two boards in a primary-backup redundant configuration (a sub-frame can be considered a single device). The recording user board provides recording functionality and requires two lines per dispatching console. Therefore, the number of recording boards required is calculated by multiplying the number of dispatching consoles by 2 ÷ the number of lines per recording board. The number of dispatching consoles (which can be considered special-purpose telephones, typically located in the dispatching center and used to make calls to various sites) is determined based on actual operational needs. The dispatching board is the interface on the dispatching program-controlled switch that connects to the dispatching console and is configured in the same manner as the recording board. The recording system stores recordings and is connected to the dispatching program-controlled switch via the recording board. Number of dispatch desks x 2 = Total number of recording devices = Total number of recording boards. A dispatch desk typically has 16 slots, which can accommodate 16 boards. It also has 512 lines (or 512 time slots), and different boards occupy different time slots. Therefore, when calculating the configuration, both the number of slots and the number of time slots must be considered to determine the total capacity of the equipment. Therefore, the table uses the greatest common divisor.

[0254] To sum up, the optimization selection method for the deployment of the electric power dispatching program control system of the present invention calculates the detailed configuration of the number of nodes and equipment capacity in the dispatching switching network according to the dispatching telephone business needs. By calculating the number of nodes and equipment capacity of the dispatching switching network, it can effectively avoid the situation where the number of nodes and equipment capacity of the dispatching switching network are inconsistent with the actual situation, thereby effectively protecting the investment and ensuring the stable operation of the dispatching switching network; this solution can quickly determine the detailed configuration plan of the dispatching switch equipment, and greatly improve the matching with actual application, which can effectively protect the initial investment and avoid excessive redundancy, while also ensuring the demand for increased dispatching telephone business volume in the future.

[0255] As a supplementary explanation, the technical problems solved by this solution mainly include the following three aspects.

[0256] 1. Calculate business demand. Based on regulations and grid company operational requirements, calculate overall business demand (number of telephone lines required). The goal is to calculate the number of nodes and equipment capacity for scheduling exchanges based on business demand.

[0257] 2. Determine the network topology. Substitute known business requirements into different bearer models for comparison (selecting the optimal bearer model based on factors such as investment, transmission channel utilization, utilization of basic resources such as computer rooms and power supplies, and management and maintenance requirements) to determine the appropriate network topology. This effectively formalizes the selection criteria for different bearer models, allowing users to substitute the requirements into the formula to obtain the optimal result.

[0258] 3. Determine the device configuration. Calculate the detailed configuration of the bearer device based on business requirements and the bearer model. This formalizes the device configuration method, allowing detailed device configuration to be calculated based on known information.

[0259] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; obviously, the embodiments described are part of the embodiments of the present invention, rather than all of them. For steps that do not have a necessary order of precedence, the order of their implementation does not necessarily follow the order of the step numbers in the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention; for ease of description, only the parts related to the relevant inventions are shown in the accompanying drawings. In the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other; modifying the technical solutions described in the aforementioned embodiments, or equivalently replacing some of the technical features therein, does not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for optimizing the deployment of a power dispatching program control system, characterized in that: It includes the following steps: Step S1, statistics the site conditions, service quantity and number of devices required to carry the services in the target area; The site situation refers to the number of sites at each voltage level within the target area. The number of services refers to the number of dispatch telephone lines. The equipment required to carry the services includes dispatch program-controlled switches and dispatch IADs. When determining the number of devices required to carry services, the number of dispatching programmable switches and dispatching IADs required to carry services is calculated based on three bearer modes: traditional mode, dispatch mode, and subnet partitioning mode. The traditional model is to use the ground dispatcher as the aggregation node to connect the dispatching program-controlled switches and dispatching IAD equipment in the area, and configure the dispatching machine as the access layer equipment at the 220kV site; The dispatching mode is to set up dispatching program-controlled switches and dispatching IAD equipment in the convergence area at the dispatching organizations at all levels according to the dispatching relationship; The subnet partitioning mode is divided according to the power supply partition of the power grid, and the dispatching machine and dispatching IAD equipment in the convergence area of ​​the aggregation node are selected within the partition; Step S2, based on the statistical results obtained in step S1, determining the optimal load-bearing mode solution for the target area through calculation and analysis; The dimensions considered when determining the optimal bearer mode solution for the target area through calculation and analysis include at least one of the following: total investment, total number of transmission channels, equipment room space occupancy, power resource occupancy, and operation and maintenance difficulty; In step S2, the dimension considered when determining the optimal carrying mode solution for the target area through calculation and analysis includes total investment; step S2 includes the following step S21; Step S21, respectively calculating the total investment under the three bearer modes, specifically including the following contents: Based on statistics, we get: the number of sites at each voltage level X i , including, 1000kV site quantity x1, 750 / 500kV site quantity x2, 330 / 220kV site quantity x3, 110 / 66kV site quantity x4, 35kV site quantity x5; The number of county surveys is Z; The number of subnet partitions K; Number of dispatchers at each voltage level m i , including, 1000kV site dispatching machine quantity m1, 750 / 500kV site dispatching machine quantity m2, 330 / 220kV site dispatching machine quantity m3, 110 / 66kV site dispatching machine quantity m4, 35kV site dispatching machine quantity m5; Number of IADs at each voltage level n i , including, n1 for the number of IADs at 1000kV sites, n2 for the number of IADs at 750 / 500kV sites, n3 for the number of IADs at 330 / 220kV sites, n4 for the number of IADs at 110 / 66kV sites, and n5 for the number of IADs at 35kV sites; Equipment unit price P j , which includes, the dispatching machine unit price P1, 2M board unit price P2, IP board unit price P3, and dispatching IAD equipment unit price P4; The total investment under the traditional model is: ； The total investment under the dispatch mode is: ； The total investment in subnet partitioning mode is: ； In step S2, the dimension considered when determining the optimal bearer mode solution for the target area through calculation and analysis also includes the total number of transmission channels; step S2 also includes the following step S22; Step S22, respectively calculating the total number of transmission channels under the three bearer modes; specifically, the following steps are included: Based on statistics, we also found that the number of FE channels required is T1, and the number of 2M channels required is T2; The total number of transmission channels in traditional mode is: <h2 style=";text-align:left;direction:ltr">T1=<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> a1=6, a2=6, a3=5, a4=2, a5=1 The total number of transmission channels in scheduling mode is: <h2 style=";text-align:left;direction:ltr">T2=<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> a1=6, a2=6, a3=3, a4=2, a5=1 The total number of transmission channels in subnet partitioning mode is: <h2 style=";text-align:left;direction:ltr">T3=<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> a1=6, a2=6, a3=2, a4=2, a5=1.

2. The method for optimizing the deployment of a power dispatching program control system according to claim 1, characterized in that: In the traditional model, 330 / 220kV and above sites are equipped with dispatching program-controlled switching equipment as the primary mode of carrying dispatching calls, 2M relays are connected to the local dispatch, and dispatching IAD equipment is equipped as the backup mode of carrying dispatching calls, and the dispatching program-controlled switching IP board of the local dispatch is responsible for issuing numbers for the dispatching IAD equipment; at 110 / 66kV sites, dispatching IAD equipment is equipped as the primary / backup mode of carrying dispatching calls, and the dispatching program-controlled switching IP board of the local dispatch is responsible for issuing numbers for the dispatching IAD equipment; at 35kV sites, dispatching IAD equipment is equipped as the primary mode of carrying dispatching calls, and the dispatching program-controlled switching IP board of the local dispatch is responsible for issuing numbers for the dispatching IAD equipment; in the traditional model, county dispatching and centralized control are only equipped with dispatching desks, and dispatching IAD equipment is used as a replacement for the original PCM equipment; In dispatching mode, dispatching program-controlled switching equipment is configured at 750 / 500kV and above sites as the primary mode for carrying dispatching calls, with 2M relays connected to local dispatching, and dispatching IAD equipment is configured for provincial dispatching and local dispatching respectively as the backup mode for carrying dispatching calls, with the dispatching program-controlled switching IP boards of provincial and local dispatching issuing numbers for the dispatching IAD equipment; at 330 / 220kV sites, dispatching IAD equipment is configured for provincial dispatching and local dispatching respectively as the primary / backup mode for carrying dispatching calls, with the dispatching program-controlled switching IP boards of provincial and local dispatching issuing numbers for the dispatching IAD equipment; at 110 / 66kV sites, dispatching IAD equipment is configured for local dispatching and county dispatching respectively as the primary / backup mode for carrying dispatching calls, with the dispatching program-controlled switching IP boards of local and county dispatching issuing numbers for the dispatching IAD equipment; at 35kV sites, dispatching IAD equipment is configured as the primary mode for carrying dispatching calls; in dispatching mode, county dispatching is configured with dispatching program-controlled switching equipment, and centralized control is only configured with dispatching desks, with dispatching IAD equipment serving as a replacement for the original PCM equipment; In the subnet partitioning mode, 750 / 500kV and above sites are equipped with dispatching program-controlled switching equipment as the primary mode of carrying dispatching calls, and 2M relays are connected to the aggregation node within the partition to which they belong. Dispatching IAD equipment is configured at the subnet aggregation node as the primary / backup mode of carrying dispatching calls, and the dispatching program-controlled switching equipment IP board of the subnet is used to allocate numbers for the dispatching IAD equipment; dispatching IAD equipment is configured at 330 / 220kV and 110 / 66kV sites as the primary / backup mode of carrying dispatching calls, and the dispatching program-controlled switching equipment IP board of the subnet aggregation node of each partition is used to allocate numbers for the dispatching IAD equipment; dispatching IAD equipment is configured at 35kV sites as the primary mode of carrying dispatching calls; in the subnet partitioning mode, the county dispatching does not configure a dispatching program-controlled switching equipment, and a dispatching program-controlled switching equipment is configured at the subnet partition aggregation point. The dispatching IAD equipment is used as a replacement for the original PCM equipment.

3. The method for optimizing the deployment of a power dispatching program control system according to claim 1, characterized in that: The traditional network topology is that the provincial dispatching, local dispatching and sites with voltage levels of 330 / 220kV and above are all equipped with corresponding dispatching program-controlled switches, and the county dispatching and centralized control are equipped with dispatching desks; sites with voltage levels of 330 / 220kV and above are also equipped with corresponding dispatching IAD equipment; sites with voltage levels below 220kV are equipped with corresponding dispatching IAD equipment; the provincial dispatching program-controlled switches are respectively connected to the dispatching program-controlled switches of each local dispatching and the provincial dispatching IAD equipment of sites with voltage levels of 330 / 220kV and above; the local dispatching program-controlled switches are respectively connected to the dispatching program-controlled switches of sites with voltage levels of 330 / 220kV and above, the local dispatching IAD equipment, and the dispatching IAD equipment of sites with voltage levels below 220kV; the equipment required for carrying services at sites of each voltage level is connected to the dispatching telephone; The network topology of the dispatching mode is as follows: corresponding dispatching program-controlled switches are configured at the provincial, prefectural and county dispatching stations, and a dispatching desk is configured at the centralized control station; the dispatching program-controlled switches of the provincial dispatching station are respectively connected to the dispatching program-controlled switches of each prefectural dispatching station; the dispatching program-controlled switches of the prefectural dispatching station are respectively connected to the dispatching program-controlled switches of each county dispatching station; stations with voltage levels of 750 / 500kV and above are equipped with corresponding dispatching program-controlled switches and dispatching IAD equipment; stations with voltage levels below 750 / 500kV are equipped with corresponding dispatching IAD equipment; each station has at least one dispatching IAD device connected to the dispatching program-controlled switch of the corresponding dispatching center with dispatching business needs; the dispatching program-controlled switches of stations with voltage levels of 750 / 500kV and above are connected to the dispatching program-controlled switches of each prefectural dispatching station; the equipment required for carrying business at stations of each voltage level is connected to the dispatching telephone; The network topology of the subnet partitioning mode is as follows: the dispatching program-controlled switching network is divided into several subnets according to the power supply partitions divided by the power grid company, and there are aggregation nodes in the subnets; the provincial dispatching, local dispatching and aggregation nodes are equipped with corresponding dispatching program-controlled switches, and the county dispatching and centralized control are equipped with dispatching desks; the dispatching program-controlled switches of the provincial dispatching are respectively connected to the dispatching program-controlled switches of each local dispatching; the dispatching program-controlled switches of the local dispatching are respectively connected to the dispatching program-controlled switches of each aggregation node; the stations with voltage levels of 750 / 500kV and above are equipped with corresponding dispatching program-controlled switches and dispatching IAD equipment; the stations with voltage levels below 750 / 500kV are equipped with corresponding dispatching IAD equipment; the dispatching IAD equipment of each station is connected to the dispatching program-controlled switch of the aggregation node; the dispatching program-controlled switches of stations with voltage levels of 750 / 500kV and above are connected to the dispatching program-controlled switches of each local dispatching; the equipment required for carrying services at stations of each voltage level is connected to the dispatching telephone.

4. The method for optimizing the deployment of a power dispatching program control system according to claim 1, characterized in that: The total investment for the three bearer modes is calculated based on typical configurations and equipment unit prices: The total investment under the traditional model is: <h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> a1=42, a2=42, a3=40, a4=4, a5=2, b1=2, b2=2, b3=1, b4=2, b5=1 The total investment under the dispatch mode is: <h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> a1=42, a2=42, a3=6, a4=4, a5=2, b1=2, b2=2, b3=3, b4=2, b5=1 The total investment in subnet partitioning mode is: <h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> a1=42, a2=42, a3=6, a4=4, a5=2, b1=2, b2=2, b3=2, b4=2, b5=1.

5. The method for optimizing the deployment of a power dispatching program control system according to claim 1, characterized in that: In step S2, the dimensions considered when determining the optimal bearer mode solution for the target area through calculation and analysis include other dimensions, including at least one of the following: computer room space occupancy, power resource occupancy, and operation and maintenance difficulty. Step S2 also includes the following steps S23 and S24; Step S23, combining the results of step S21 and step S22 and considerations of other dimensions, respectively calculating evaluation reference values ​​under the three bearing modes; First, weights are set for the corresponding dimensions, including total investment weight i1, total number of transmission channels weight i2, computer room space occupancy weight i3, power resource occupancy weight i4, and operation and maintenance difficulty weight i5. Then, define the evaluation coefficients of different dimensions; Comparing the total investment under the three models, the evaluation coefficient of the lowest total investment is set as 1. Taking the lowest total investment as the benchmark, the total investment evaluation coefficient j1 under the three models is determined according to the ratio of 0.1 reduction for every additional 1 million yuan. Compare the total number of transmission channels under the three modes, set the evaluation coefficient of the lowest total number of transmission channels to 1, and use the lowest total number of transmission channels as the benchmark. Determine the evaluation coefficient j2 of the total number of transmission channels under the three modes at a ratio of 0.1 reduction for every 10 channels added. Compare the computer room space occupancy in the three modes, set the evaluation coefficient of the lowest computer room space occupancy as 1, and use the lowest computer room space occupancy as the benchmark. Determine the computer room space occupancy evaluation coefficient j3 for the three modes by reducing the evaluation coefficient by 0.1 for each additional cabinet position. Compare the power resource usage in the three modes, set the evaluation coefficient of the lowest power resource usage as 1, and use the lowest power resource usage as the benchmark. Determine the power resource usage evaluation coefficient j4 in the three modes according to the ratio of reducing the power resource evaluation coefficient by 0.1 for every 10A increase. Select the difficulty coefficient according to the actual situation, and the value range is 0<j5<1; Then, the evaluation reference values ​​under the three load modes are calculated using the following formulas: Evaluation reference value S=i1×j1+i2×j2+i3×j3+i4×j4+i5×j5; Step S24 , comparing the evaluation reference values ​​under the three bearing modes, wherein the bearing mode corresponding to the maximum value is the preferred bearing mode for the target area.

6. The method for optimizing the deployment of a power dispatching program control system according to any one of claims 1 to 5, characterized in that: The process further includes step S3, further determining a method for selecting and numbering aggregation nodes for the program-controlled dispatch switching network in the target area based on the bearer mode determined in step S2; step S3 includes steps S31 to S33, each of which is performed according to the bearer mode determined in step S2; Step S31: For the traditional mode, the aggregation node corresponds to the local dispatching node, and the number of aggregation nodes is equal to the number of the local dispatching program-controlled switches; Step S32: For the dispatch mode, the aggregation nodes correspond to the local dispatch and the county dispatch. The number of aggregation nodes is equal to the sum of the number of dispatch program-controlled switches of the local dispatch and the number of dispatch program-controlled switches of the county dispatch. Step S33, for the subnet partition mode, specifically adopt the following steps S331 to S332 to determine; Step S331, selecting a sink node for each subnet; The aggregation node is a site with a voltage level of 220kV or above selected within the subnet zone to which it belongs, and the selected site meets at least one of the following conditions: 1) Sites with good computer room locations and power supply conditions; 2) Reliable sites with optical cable resources; 3) Sites with rich transmission resources; 4) Nodes where services are concentrated; Step S332, determining the number of nodes for each subnet; For each subnet, the following steps S3321 and S3322 are included; Step S3321: Count the number of sites at each voltage level in the subnet, and then preliminarily select and estimate the number of aggregation nodes; Step S3322, based on the result of step S3321, the equipment capacity is calculated according to the subnet partitioning mode to obtain the capacity and number of scheduling program-controlled switch equipment required by the subnet; the obtained number of scheduling program-controlled switch equipment is used as the number of aggregation nodes selected for each subnet partition.

7. The method for optimizing the deployment of a power dispatching program control system according to claim 6, characterized in that: After step S332, step S333 is also included; step S333 is a service coverage and power supply zone matching check, which specifically includes the following contents: According to the number of aggregation nodes and equipment capacity determined in step S332, combined with the power supply zoning, check whether the aggregation nodes in each subnet can carry all the dispatch telephone services in the subnet, and whether there is no overload or underload phenomenon in the aggregation nodes; if so, the verification passes; if not, increase the aggregation nodes or adjust the equipment capacity to meet the service access, and verify again until the verification passes; determine the aggregation nodes and their number based on the plan that passes the verification.

8. The method for optimizing the deployment of a power dispatching program control system according to claim 7, characterized in that: The verification method of step S333 is as follows: for the actual number of sites X, the number of scheduled IAD devices N, the number of configured IP users M3, the required number of IP boards M2, and the number of aggregation nodes L, the verification pass standard is L≥2, M3≥2×N, N / M2≤64, and X / L≤64 within the same subnet partition.

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