Optimized selection method for deployment of power dispatching programmed control system

Abstract

The invention discloses an optimization selection method for deployment of a power dispatching programmed control system. The optimization selection method comprises the following steps: step S1, carrying out statistics on a site condition and a service quantity of a target region and the quantity of equipment required for bearing services; when the number of devices required for bearing the service is determined, the number of scheduling stored program control switches required for bearing the service and the number of scheduling IAD devices required for bearing the service are counted respectively based on the three bearing modes; wherein the three bearing modes are respectively a traditional mode, a scheduling mode and a subnet partition mode; step S2, based on the statistical result obtained in the step S1, determining an optimal bearing mode scheme of the target region through calculation and analysis; wherein the dimensions considered when the optimal bearing mode scheme of the target area is determined through calculation and analysis comprise at least one of total investment, total transmission channel number, machine room space occupation condition, power source resource occupation condition and operation and maintenance difficulty condition. By adopting the scheme, investment can be effectively protected, and stable operation of the dispatching switching network can be guaranteed.

Description

Technical Field

[0001] The 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 planning 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 according to the deployment conditions in various regions, and select aggregation nodes according to the needs of the deployment method, determine the number of deployment nodes and the corresponding equipment configuration.

[0003] At present, the dispatching program-controlled switching network of each node in the power communication network is deployed and configured simply by operation and maintenance and design personnel based on experience, which easily leads to unclear deployment scope and the detailed configuration is inconsistent with the actual situation; in addition, the coordination degree of various node deployment and matching in the existing dispatching program-controlled switching network is not enough, which leads to excessive redundancy of the configuration capacity and number of boards of many dispatching program-controlled switching network communication sites that have been put into operation, and insufficient configuration capacity and number of boards of many dispatching program-controlled switching network communication sites that have been put into operation. Therefore, it is necessary to construct a standardized and effective optimization method to determine a reasonable and better deployment plan for the dispatching program-controlled switching network of the power system according to the situation of a specific region. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an optimization selection method for the deployment of a power dispatching program control system, so as to solve the problem that the existing dispatching switching network equipment simply relies on experience to configure the number of nodes and equipment capacity, which easily leads to unclear deployment scope, poor matching and coordination, etc. The present invention proposes three bearing mode solutions, which can effectively avoid the situation where the number of nodes and equipment capacity of the dispatching switching network do not match the actual situation by calculating the number of nodes and equipment capacity of the dispatching switching network, thereby effectively protecting the 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 comprises the following steps: Step S1, counting 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 of each voltage level in the target area, the number of services refers to the number of dispatch telephone lines, and the equipment required to carry the services includes dispatch program-controlled switches and dispatch IAD equipment; When determining the number of devices required to carry services, the number of dispatching program-controlled switches and the number of dispatching IAD devices required to carry services are counted based on three bearer modes; the three bearer modes are traditional mode, dispatching mode, and subnet partitioning mode. The traditional mode 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 the 220kV site is equipped with a dispatcher as the access layer equipment; 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 are selected in the partition; Step S2, based on the statistical results obtained in step S1, determining the optimal bearer mode solution for the target area through calculation and analysis; Among them, the dimensions considered when determining the optimal bearing 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.

[0006] Furthermore, in the traditional mode, the dispatching program-controlled switch equipment is configured at 330 / 220kV and above sites as the main mode for carrying dispatching calls, and the 2M relay is connected to the local dispatching, and the dispatching IAD equipment is configured as the backup mode for carrying dispatching calls, and the dispatching program-controlled switch IP board of the local dispatching places the dispatching IAD equipment; the dispatching IAD equipment is configured at 110 / 66kV sites as the main / backup mode for carrying dispatching calls, and the dispatching program-controlled switch IP board of the local dispatching places the dispatching IAD equipment; the dispatching IAD equipment is configured at 35kV sites as the main mode for carrying dispatching calls, and the dispatching program-controlled switch IP board of the local dispatching places the dispatching IAD equipment; in the traditional mode, the county dispatching and centralized control only configure the dispatching desk, and the dispatching IAD equipment is used as a replacement for the original PCM equipment; In the dispatching mode, the dispatching program-controlled switch equipment is configured at 750 / 500kV and above sites as the main mode of carrying dispatching calls, and the 2M relay is connected to the local dispatching. The provincial dispatching and local dispatching are respectively configured with dispatching IAD equipment as the backup mode of carrying dispatching calls, and the dispatching program-controlled switch IP boards of the provincial and local dispatching are used to place numbers for the dispatching IAD equipment; at 330 / 220kV sites, the provincial dispatching and local dispatching are respectively configured with dispatching IAD equipment as the main / backup mode of carrying dispatching calls, and the dispatching program-controlled switch IP boards of the provincial and local dispatching are used to place numbers for the dispatching IAD equipment; at 110 / 66kV sites, the local dispatching and county dispatching are respectively configured with dispatching IAD equipment as the main / backup mode of carrying dispatching calls, and the dispatching program-controlled switch IP boards of the local and county dispatching are used to place numbers for the dispatching IAD equipment; at 35kV sites, the dispatching IAD equipment is configured as the main mode of carrying dispatching calls; in the dispatching mode, the county dispatching is configured with a dispatching program-controlled switch, and the centralized control is only configured with a dispatching desk, and the dispatching IAD equipment is used 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 for carrying dispatching calls, and 2M relays are connected to the aggregation node in the partition to which it belongs. Dispatching IAD equipment is configured at the subnet aggregation node as the primary / backup mode for carrying dispatching calls, and the dispatching program-controlled switching equipment IP board of the subnet is used to issue numbers; dispatching IAD equipment is configured at 330 / 220kV and 110 / 66kV sites as the primary / backup mode for carrying dispatching calls, and the dispatching program-controlled switching equipment IP board of the subnet aggregation node of each partition is used to issue numbers; dispatching IAD equipment is configured at 35kV sites as the primary mode for 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, and the dispatching IAD equipment is used as a replacement for the original PCM equipment.

[0007] Furthermore, the network topology of the traditional mode 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 equipment; the 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 dispatching telephones; The network topology of the dispatching mode is that the provincial dispatching, local dispatching and county dispatching are all equipped with corresponding dispatching program-controlled switches, and the centralized control is equipped with a dispatching desk; 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 county dispatching; 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; 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 local dispatching; the equipment required for the bearer business of 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 lower than 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 dispatching telephones.

[0008] Furthermore, in step S2, the dimension considered when determining the optimal carrying mode solution for the target area through calculation and analysis includes the total investment; step S2 includes the following step S21; Step S21, respectively calculating the total investment under the three bearing modes, specifically including the following contents: Based on statistics, we get: the number of sites at each voltage level is 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; County survey quantity 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, the number of IADs at 1000kV sites n1, the number of IADs at 750 / 500kV sites n2, the number of IADs at 330 / 220kV sites n3, the number of IADs at 110 / 66kV sites n4, and the number of IADs at 35kV sites n5; Equipment 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 in the dispatch mode is: ; The total investment in subnet partitioning mode is: ; Step S22, respectively calculating the total number of transmission channels under the three bearer modes, specifically includes the following contents.

[0009] Furthermore, the total investment under the three bearer modes is obtained based on typical configurations and equipment unit prices: The total investment under the traditional model is: , a1=42, a2=42, a3=40, a4=4, a5=2; b1=2, b2=2, b3=1, b4=2, b5=1; The total investment in the dispatch mode is: , 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: , a1=42, a2=42, a3=6, a4=4, a5=2; b1=2, b2=2, b3=2, b4=2, b5=1.

[0010] 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; Step S22, respectively calculating the total number of transmission channels under the three bearer modes; specifically including the following contents: Based on statistics, we also get: 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: T1= , a1=6, a2=6, a3=5, a4=2, a5=1; The total number of transmission channels in scheduling mode is: T2= , a1=6, a2=6, a3=3, a4=2, a5=1; The total number of transmission channels in subnet partitioning mode is: T3= , a1=6, a2=6, a3=2, a4=2, a5=1.

[0011] Further, in step S2, the dimensions considered when determining the optimal bearer mode solution for the target area through calculation and analysis also include other dimensions, and the other dimensions include at least one of the space occupancy of the computer room, the occupancy of power resources, and the difficulty of operation and maintenance; 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 transmission channel weight i2, computer room space occupancy weight i3, power resource occupancy weight i4, and operation and maintenance difficulty weight i5. Then, the evaluation coefficients of different dimensions are defined; Compare the total investment under the three modes, set the evaluation coefficient of the lowest total investment as 1, and determine the total investment evaluation coefficient j1 under the three modes respectively according to the ratio of 0.1 reduction for every increase of 1 million yuan in the lowest total investment; Compare the total number of transmission channels in the three modes, set the evaluation coefficient of the lowest total number of transmission channels as 1, and determine the evaluation coefficient j2 of the total number of transmission channels in the three modes respectively according to the ratio of reducing the evaluation coefficient by 0.1 for every 10 channels added, taking the lowest total number of transmission channels as the benchmark; Compare the computer room space occupancy in the three modes, set the lowest computer room space occupancy evaluation coefficient as 1, and use the lowest computer room space occupancy as the benchmark, and determine the computer room space occupancy evaluation coefficient j3 in the three modes according to the ratio of reducing the evaluation coefficient by 0.1 for each additional cabinet position; Compare the power resource occupancy in the three modes, set the evaluation coefficient of the lowest power resource occupancy to 1, and use the lowest power resource occupancy as the benchmark, and determine the power resource occupancy 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 by 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.

[0012] Furthermore, the method further includes step S3, based on the bearer mode determined in step S2, further determining the aggregation node selection method and the number of aggregation nodes of the program-controlled dispatching 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; Step S31, for the traditional mode, the aggregation node corresponds to the local dispatching, and the number of aggregation nodes is equal to the number of dispatching program-controlled switches of the local dispatching; Step S32, for the dispatching mode, the aggregation nodes correspond to the local dispatching and the county dispatching, and the number of aggregation nodes is equal to the sum of the number of dispatching program-controlled switches of the local dispatching and the number of dispatching program-controlled switches of the county dispatching; Step S33, for the subnet partitioning mode, specifically adopt the following steps S331 to S332 to determine; Step S331, selecting a sink node for each subnet respectively; The aggregation node is a site with a voltage level of 220kV or above selected within the subnet partition to which it belongs, and the selected site meets at least one of the following conditions: 1) Sites with good equipment room locations and power supply conditions; 2) Reliable sites for 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 respectively; Wherein, for each subnet, the following steps S3321 and S3322 are included; Step S3321, counting the number of sites of each voltage level in the subnet, and then preliminarily selecting and estimating 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 for the subnet; the obtained number of scheduling program-controlled switch equipment is used as the number of aggregation nodes selected for each subnet partition.

[0013] Furthermore, after step S332, step S333 is also included; step S333 is a service coverage and power supply partition 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.

[0014] 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 standard is L≥2, M3≥2×N, N / M2≤64, and X / L≤64 within the same subnet partition.

[0015] Compared with the prior art, the beneficial technical effects of the present invention are as follows: 1. The optimization selection method for the deployment of the electric power dispatching program control system of the present invention proposes three bearer mode solutions 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 best 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.

[0016] 2. The optimization selection method for the deployment of the electric power dispatching program control 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 the actual application, effectively protect the initial investment to avoid excessive redundancy, and also help to ensure the demand for increased dispatching telephone business volume in the future. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a flow chart of the method provided by the present invention.

[0018] Figure 2 It is a schematic diagram of a typical network topology structure under the traditional mode of the present invention.

[0019] Figure 3 It is a schematic diagram of a typical network topology structure under the scheduling mode of the present invention.

[0020] Figure 4 It is a schematic diagram of a typical network topology structure under the subnet partitioning mode of the present invention. DETAILED DESCRIPTION

[0021] In order to overcome the existing method of calculating the number of nodes and equipment capacity of the dispatching exchange network equipment based solely on experience, which easily leads to the situation that the number of nodes and equipment capacity of the dispatching exchange network are greatly inconsistent with the actual situation, the present invention provides an optimization selection method for the deployment of a power dispatching program control system, which is used to calculate the number of nodes and equipment capacity of the dispatching exchange and optimize the existing network structure. This scheme calculates the number of nodes and equipment capacity of the dispatching exchange network, which can effectively avoid the situation that the number of nodes and equipment capacity of the dispatching exchange network are inconsistent with the actual situation, thereby effectively protecting the investment and ensuring the stable operation of the dispatching exchange network.

[0022] 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 center (referred to as national dispatching), branch-level dispatching center (referred to as branch dispatching), provincial-level dispatching center (referred to as provincial dispatching), prefecture-level dispatching center (referred to as prefecture dispatching), county-level dispatching center (referred to as county dispatching), and centralized control center (referred to as centralized control); hierarchical dispatching management is carried out in this way. 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: according to the specific dispatching telephone service needs of a certain place, the preferred structural scheme of the dispatching exchange network and the detailed configuration of the number of nodes and equipment capacity therein can be reasonably determined.

[0023] See also Figure 1 The optimization selection method for the deployment of the electric power dispatching program control system provided by the present invention includes the following steps (since the deployment of the national dispatching and the branch dispatching in the dispatching exchange network is relatively simple and single, the following description only considers the provincial level and below and takes the prefecture-level city as the unit; the relevant contents of the national dispatching and the branch dispatching refer to the relevant regulations and requirements of the existing network and do not affect the content of this patent): Step S1, according to the demand analysis of the power dispatch telephone service, the site conditions, the number of services and the number of equipment required to carry the services in the target area are counted. Among them, the site conditions refer to the number of sites of each voltage level in the target area. Different voltage levels include, for example, 1000kV stations, 750 / 500kV stations, 330 / 220kV stations, 110 / 66kV stations, 35kV stations, etc. Each voltage level station further includes at least one specific site in the source, network, and load. "Source" refers to, for example, a power plant (a thermal power plant, a wind farm, and other new energy booster station), "network" refers to a power grid substation, and "load" refers to a user station (load station). The number of services is the number of dispatch telephone lines. According to the number of dispatch telephone lines required, the number of equipment required to carry the services can be obtained. Referring to the dispatch telephone service carrying equipment of most domestic power systems at present, it can be divided into two types: dispatch program-controlled switches (referred to as dispatch machines) and dispatch IADs. In this scheme, the "IP user board + IAD equipment" mode is used as an example for specific description. The equipment required for the bearer service (referred to as bearer equipment) includes a dispatching program-controlled switch and a dispatching IAD device.

[0024] Specifically, step S1 includes the following steps S11 to S13.

[0025] Step S11, collecting statistics on the sites in the target area, such as shown in Table 1 below (the table contains sample data).

[0026] Table 1 Statistics of the number of dispatching stations at all levels

[0027] Step S12, counting the number of services (i.e., the dispatching telephone lines required to carry the services); specifically includes the following contents.

[0028] Referring to the current situation of domestic power system dispatch telephone service demand, the service demand units are: provincial dispatch center (provincial dispatch), municipal dispatch center (local dispatch), county dispatch center (county dispatch) and centralized control center (centralized control). For example, Table 1 below is a typical service demand table.

[0029] Table 2 Number of dispatch telephones deployed at various dispatch stations of dispatch agencies at all levels

[0030] The number of dispatch telephone deployments (i.e., the dispatch telephone lines required to carry the business) is determined based on typical configurations and local specific needs (the number of requirements can be modified based on differences in different regions, 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 telephones for communicating with the provincial dispatch, 1 dispatch telephone for communicating with the local dispatch, and 2 dispatch telephones for communicating with the centralized control. In this way, 6 telephones need to be deployed in the specific sites of each 1000kV station. Combined with the site conditions counted in step S11, the number of dispatch telephones required for the target area as a whole and the distribution and deployment of these dispatch telephones corresponding to each site can be determined.

[0031] 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 bearing services; specifically including the following contents.

[0032] First, this solution proposes to divide the dispatch telephone service bearer mode into the following three bearer modes: traditional mode, dispatch mode, and subnet partition mode. Typical network topology structures under different bearer modes are as follows: Figure 2 , Figure 3 , Figure 4 As shown ( Figure 2-4 It is only a schematic diagram. Taking a 1000kV site as an example, the figure only shows the situation of one 1000kV site. In fact, there may be two or more 1000kV sites, all of which are connected as shown in the figure and in the following manner; and, taking a ground dispatch as an example, the ground dispatch N in the figure means that there are multiple ground dispatches, and the figure only shows the downstream connection of one ground dispatch. In fact, the remaining ground dispatches are connected as shown in the figure and in the following manner). Among them, the dispatching organization that is not equipped with a dispatching telephone bearer needs to be equipped with a dispatching desk, which is connected to the dispatching machine of the site with a dispatching machine.

[0033] The traditional mode is the most commonly used networking mode in the current power grid dispatching exchange network. The traditional mode is to use the local dispatching as the aggregation node to connect the dispatching program-controlled switches and dispatching IAD equipment in the area, and the 220kV site is equipped with a dispatching machine as the access layer equipment. Specifically, in the traditional mode, the 330 / 220kV and above sites are equipped with a dispatching program-controlled switch (referred to as a dispatching machine) as the main mode of carrying dispatching calls (to achieve telephone communication with provincial dispatching, local dispatching, county dispatching, and centralized control), and the 2M relay is connected to the local dispatching; and the dispatching IAD equipment is configured as a backup mode of carrying dispatching calls (to achieve telephone communication with provincial dispatching, local dispatching, and centralized control), and the local dispatching dispatching switch IP board releases the dispatching IAD equipment. The dispatching IAD equipment is configured at the 110 / 66kV site as the main / backup mode of carrying dispatching calls (to achieve telephone communication with local dispatching and county dispatching), and the dispatching IAD equipment is released by the local dispatching dispatching switch IP board. The dispatching IAD equipment is configured at the 35kV site as the main mode of carrying dispatching calls (to realize telephone communication of the county dispatching), and the dispatching IAD equipment is issued by the local dispatching dispatching switch IP board. In this mode, the county dispatching and centralized control do not configure the dispatching program-controlled switch, but only the dispatching desk, and the dispatching IAD equipment is used as a replacement for the original PCM equipment.

[0034] In other words, the network topology of the traditional mode 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 IAD devices and local 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, a 110 / 66kV site has 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 (including the connected main dispatching program-controlled switch and the backup dispatching program-controlled switch) and the provincial dispatching IAD equipment of the 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 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 lower than 220kV; the equipment required for the carrying business of the 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 2 .

[0035] The dispatching mode is to set up dispatching program-controlled switches and dispatching IAD equipment in the convergence area of ​​the dispatching organizations at all levels according to the dispatching relationship (dispatching telephone carrying equipment is configured separately for dispatching organizations at all levels). Specifically, in the dispatching mode, dispatching program-controlled switch equipment is configured at 750 / 500kV and above sites as the main mode of carrying dispatching calls (to achieve telephone communication with provincial dispatching, local dispatching, and centralized control), and 2M relays are connected to local dispatching; dispatching IAD equipment is configured for provincial dispatching and local dispatching as a backup mode of carrying dispatching calls (to achieve telephone communication with provincial dispatching, local dispatching, and centralized control), and the dispatching program-controlled switch IP boards of provincial dispatching and local dispatching release numbers for IAD equipment. At 330 / 220kV sites, dispatching IAD equipment is configured for provincial dispatching and local dispatching as the main / backup mode of carrying dispatching calls (to achieve telephone communication with provincial dispatching, local dispatching, county dispatching, and centralized control), and the dispatching program-controlled switch IP boards of provincial dispatching and local dispatching release numbers for dispatching IAD equipment. At 110 / 66kV sites, dispatch IAD equipment is configured for local dispatch and county dispatch as the main / backup mode for carrying dispatch calls (to achieve telephone communication with local dispatch, county dispatch and centralized control), and the dispatch program-controlled switch IP board of local dispatch and county dispatch releases the dispatch IAD equipment. Dispatching IAD equipment is configured at 35kV sites as the main mode for carrying dispatch calls (to achieve telephone communication of county dispatch). In this mode, the county dispatch is configured with a dispatch program-controlled switch, and the dispatch IAD equipment is used as a replacement for the original PCM equipment. The centralized control is only configured with a dispatch desk.

[0036] In other words, the network topology of the dispatching mode is that the provincial dispatching, local 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 local dispatching; the dispatching program-controlled switches of the local dispatching are respectively connected to the dispatching program-controlled switches of each county dispatching (the main dispatching program-controlled switch of the local dispatching is connected to the main dispatching program-controlled switch of the county dispatching, and the backup dispatching program-controlled switch of the local dispatching is connected to the backup dispatching program-controlled switch of the county dispatching); the corresponding dispatching program-controlled switches and dispatching program-controlled switches are configured at stations with voltage levels of 750 / 500kV and above 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 various local dispatching centers; the equipment required for the carrying business of sites at 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 .

[0037] The subnet partitioning mode is divided according to the power supply partition of the power grid (forming several subnet partitions), and the dispatching machine and dispatching IAD equipment in the convergence area of ​​the convergence node are selected in the partition. Specifically, in the subnet partitioning mode, the dispatching program-controlled switch equipment is configured at 750 / 500kV and above sites as the main mode of carrying dispatching calls (realizing telephone communications with provincial dispatching, local dispatching, and centralized control), and the 2M relay is converged to the convergence node in the corresponding partition; and the dispatching IAD equipment is configured at the subnet convergence node as the main / backup mode of carrying dispatching calls (realizing telephone communications with provincial dispatching, local dispatching, and centralized control), and the dispatching program-controlled switch IP board of the partition subnet releases the number for the dispatching IAD equipment. The dispatching IAD equipment is configured at 330 / 220kV and 110 / 66kV sites as the main / backup mode of carrying dispatching calls (realizing telephone communications with provincial dispatching, local dispatching, county dispatching, and centralized control), and the dispatching program-controlled switch IP board of each subnet convergence node of the corresponding partition releases the number for the dispatching IAD equipment. The dispatching IAD equipment is configured at the 35kV site as the main mode of carrying dispatching calls (to realize telephone communication of the county dispatching). In this mode, the county dispatching and centralized control do not configure dispatching program-controlled switches, but only dispatching desks. Dispatching program-controlled switches are configured at the subnet partition aggregation point, and the dispatching IAD equipment is used as a replacement for the original PCM equipment.

[0038] 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 provincial dispatching dispatching program-controlled switches are respectively connected to the dispatching program-controlled switches of each local dispatching; the local dispatching dispatching program-controlled switches 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 The stations with voltage levels of 750 / 500kV and above are all equipped with corresponding dispatching program-controlled switches and dispatching IAD equipment; the stations with voltage levels lower than 750 / 500kV (330 / 220kV stations, 110 / 66kV stations and 35kV stations) are equipped with corresponding dispatching IAD equipment, and the number of which is determined according to needs; 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 dispatch; the equipment required for carrying services at stations 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 4 .

[0039] Furthermore, the number of devices required under different bearer modes is shown in Table 3, Table 4, and Table 5 below: Table 3 Number of bearer devices required in traditional mode

[0040] Table 4 Required number of bearer devices under scheduling mode

[0041] Table 5 Required number of bearer devices in subnet partitioning mode

[0042] By combining the statistical results of step S11 and step S12, it is possible to determine the number of dispatching programmable switches (including the main component boards: the number of 2M boards and IP boards) and the number of dispatching IAD devices required for the target area as a whole when the above three bearer modes are adopted respectively, as well as the deployment plan of these devices (that is, the network topology structure under the three bearer modes based on the site conditions in the target area).

[0043] Step S2, based on the statistical results obtained in step S1, determine the optimal bearer mode solution for the target area through calculation and analysis. According to the business demand statistics (such as the above statistical table), and the number of sites of each voltage level in the target area is known, different bearer modes can be substituted, and the selected network topology can be further determined according to different indicator dimensions, and then the number of required aggregation nodes can be calculated. Among them, when determining the selected network topology according to different indicator dimensions, the specific dimensions considered include, for example, investment conditions, transmission resource conditions and other dimensions.

[0044] Specifically, step S2 includes the following steps S21 to S24.

[0045] Step S21, respectively calculating the total investment under the three bearing modes; specifically including the following contents.

[0046] Taking the provincial company as an example, the variables required to calculate equipment investment include (the following calculation method is based on cities only. In actual application, the total investment at the provincial company level is the sum of all cities within the provincial company): Number of stations 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; County survey quantity 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, the number of IADs at 1000kV sites n1, the number of IADs at 750 / 500kV sites n2, the number of IADs at 330 / 220kV sites n3, the number of IADs at 110 / 66kV sites n4, and the number of IADs at 35kV sites n5; Equipment 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; (1) The calculation formula of the total investment in the traditional model is: Multiply the number of sites by the number of typical bearer equipment configurations in this mode and add them together to get the following variables: The number of dispatchers required ; The number of 2M boards required is M1 = M × 4; The number of IP boards required is M2 = N ÷ 64 × 2 (M2 is a positive integer, which is rounded up when it is less than 1, and rounded up in other cases); Number of IAD devices to be dispatched ; The total price of the dispatching machine, 2M board, IP board, and dispatching IAD is used as the basis for investment calculation; It can be concluded that the total investment under the traditional model is: ; Among them, considering that the unit price of equipment and the number of dispatchers and IADs of each voltage level are fixed constants in actual applications, they can be substituted into Table 3; at the same time, the unit price of equipment can also be regarded as a constant setting, such as P1=30, P2=2, P3=8, P4=2 (unit: 10,000 yuan). (The number of equipment refers to the typical configuration, and the unit price of equipment refers to the current market price.) Based on 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: ; 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.

[0047] (2) Calculation formula for the total investment of the dispatching mode: Multiply the number of sites by the number of typical bearer equipment configurations in this mode and add them together to get the following variables: The number of dispatchers required ; The number of 2M boards required is M1 = M×4+Z×2×3; The number of IP boards required is M2 = N ÷ 64 × 2 (M2 is a positive integer, which is rounded up when it is less than 1, and rounded up in other cases); Number of IAD devices to be dispatched ; The total price of the dispatching machine, 2M board, IP board, and dispatching IAD is used as the basis for investment calculation; It can be concluded that the total investment in the dispatching mode is: ; Among them, considering that the unit price of equipment and the number of dispatchers and IADs of each voltage level are fixed constants in actual applications, they can be substituted into Table 4; at the same time, the unit price of equipment can also be regarded as a constant and set P1=30, P2=2, P3=8, P4=2 (unit: 10,000 yuan). (The number of equipment refers to the typical configuration, and the unit price of equipment refers to the current market price.) From this, we can conclude that when m is known i 、n i , P j When F2 corresponds to X i Function: ; 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.

[0048] (3) The calculation formula for the total investment of the subnet partitioning model is: Multiply the number of sites by the number of typical bearer equipment configurations in this mode and add them together to get the following variables: The number of dispatchers required ; The number of 2M boards required is M1 = M×4+K×2×3; The number of IP boards required is M2 = N ÷ 64 × 2 (M2 is a positive integer, which is rounded up when it is less than 1, and rounded up in other cases); Number of IAD devices to be dispatched ; The total price of the dispatching machine, 2M board, IP board, and dispatching IAD is used as the basis for investment calculation; It can be concluded that the total investment in the subnet partitioning mode is: ; Among them, considering that the unit price of equipment and the number of dispatchers and IADs of each voltage level are fixed constants in actual applications, they can be substituted into Table 5; at the same time, the unit price of equipment can also be regarded as a constant and set P1=30, P2=2, P3=8, P4=2 (unit: 10,000 yuan). (The number of equipment refers to the typical configuration, and the unit price of equipment refers to the current market price.) From this, we can conclude that when m is known i 、n i , P j When F3 corresponds to X i Function: ; 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.

[0049] According to the above formula, the total investment under different carrying modes in the target area (under the same provincial company scale) can be calculated. In some embodiments, the carrying mode can be selected according to the principle of minimum total investment.

[0050] Step S22, respectively calculating the total number of transmission channels under the three bearer modes; specifically including the following contents.

[0051] Referring to the current situation that most of the domestic power system dispatching IAD business bearer network is the MSTP channel (FE channel for short) of the transmission SDH equipment, the dispatching machine's business bearer network is the 2M channel of the transmission SDH equipment; the number of sites of each voltage level in the target area is known, and the number of required transmission channels can be calculated by substituting different bearer modes.

[0052] Taking the provincial company as an example to calculate the number of transmission channels, the new variables required based on the above steps include (the following calculation method is only based on cities. In actual application, the sum of all cities within the provincial company is the number of channels required at the provincial company level): The number of 2M channels required is T1, and the number of FE channels required is T2; each dispatching IAD requires 1 FE channel, and the number of 2M channels required by each dispatching machine is equal to the number of 2M boards.

[0053] (1) The calculation formula for the total number of transmission channels in the traditional mode is: T1=2M Board quantity= , T2 = Number of IADs to be scheduled = ; 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: , where a1=1, a2=1, a3=1, a4=0, a5=0; , where a1=2, a2=2, a3=1, a4=2, a5=1; In practical 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.

[0054] In order to quantify the actual significance of channel requirements for comparison, the total occupied channel bandwidth can be used as a comparison dimension, where the occupied bandwidth of 2M channels and FE channels is both 2 Mbit / s.

[0055] It can be concluded that the total number of transmission channels in the traditional mode is: T1=T1+T2= , where a1=6, a2=6, a3=5, a4=2, a5=1.

[0056] (2) The calculation formula for the total number of transmission channels in the scheduling mode is: T1=2M Board quantity= ; T2 = Number of IADs to be scheduled = ; 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: , where a1=1, a2=1, a3=0, a4=0, a5=0; , where a1=2, a2=2, a3=3, a4=2, a5=1; In practical 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.

[0057] In order to quantify the actual significance of channel requirements for comparison, the total occupied channel bandwidth can be used as a comparison dimension, where the occupied bandwidth of 2M channels and FE channels is both 2 Mbit / s.

[0058] It can be concluded that the total number of transmission channels in the scheduling mode is: T2=T1+T2= , where a1=6, a2=6, a3=3, a4=2, a5=1.

[0059] (3) The calculation formula for the total number of transmission channels in the subnet partitioning mode is: T1=2M Board quantity= , T2 = Number of IADs to be scheduled = ; 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: , where a1=1, a2=1, a3=0, a4=0, a5=0; , where a1=2, a2=2, a3=2, a4=2, a5=1; In practical 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.

[0060] In order to quantify the actual significance of channel requirements for comparison, the total occupied channel bandwidth can be used as a comparison dimension, where the occupied bandwidth of 2M channels and FE channels is both 2 Mbit / s.

[0061] It can be concluded that the total number of transmission channels in the subnet partitioning mode is: T3=T1+T2= , where a1=6, a2=6, a3=2, a4=2, a5=1.

[0062] According to the above formula, the transmission equipment channel resource occupancy under different bearer modes in the target area (under the same provincial company scale) can be calculated. In some embodiments, the bearer mode can be selected based on the principle of minimum resource occupancy (minimum total number of transmission channels).

[0063] Step S23, comprehensively considering the results of step S21 and step S22 and other dimensions, respectively calculate the evaluation reference values ​​under the three bearing modes. In other words, on the basis of considering the optimal bearing mode from the dimensions of investment and resource occupancy, it is preferred to comprehensively consider other dimensions such as computer room and power basic resource occupancy to select the optimal bearing mode. The other dimensions include at least one of the computer room space occupancy, power resource occupancy, and operation and maintenance difficulty. For example, the other dimensions may only include the computer room space occupancy.

[0064] First, set the weights for the corresponding dimensions, as shown in the following table:

[0065] The selection of weights can be set according to the specific project. This patent recommends the following weights:

[0066] Then, the evaluation coefficients of different dimensions are defined.

[0067] a. The total investment evaluation coefficient is determined according to the following principles: Comparing the total investment under the three models, the evaluation coefficient of the lowest total investment is set to 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.

[0068] b. The evaluation coefficient of the total number of transmission channels is determined according to the following principles: 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 0.1 for every 10 channels added.

[0069] c. The computer room space occupancy evaluation coefficient is determined according to the following principles: Comparing the space occupancy of the computer room in the three modes, the evaluation coefficient of the lowest computer room space occupancy is set to 1. Taking the lowest computer room space occupancy as the benchmark, the computer room space occupancy evaluation coefficient j3 in the three modes is determined according to the ratio of 0.1 reduction for each additional cabinet position. (The space occupancy of the computer room is determined according to the number of equipment and channels, which can be achieved according to existing technical means, and is not the focus of the present invention, so it will not be elaborated here.) d. The power resource occupancy evaluation coefficient is determined according to the following principles: Comparing the power resource occupancy in the three modes, the evaluation coefficient of the lowest power resource occupancy is set to 1, and the power resource occupancy evaluation coefficient j4 in the three modes is determined according to the ratio of 0.1 for every 10A increase in the power resource evaluation coefficient. (The power resource occupancy is determined according to the number of devices and channels, which can be achieved according to existing technical means, and is not the focus of the present invention. It will not be elaborated here.) e. The operation and maintenance difficulty evaluation coefficient is determined according to the following principles: The difficulty coefficient is selected according to the actual situation, and the value range is 0<j5<1. For example, for the traditional mode, when there are many sites and equipment, the operation and maintenance difficulty will be very high, so its operation and maintenance difficulty evaluation coefficient is set to a lower value; for example, when there are few sites, the operation and maintenance difficulty of the traditional mode may be the lowest, so its operation and maintenance difficulty evaluation coefficient is set to a higher value; for example, for the dispatching mode, since there is a direct correspondence between the dispatching phone and the business, the operation and maintenance difficulty will be relatively low, so its operation and maintenance difficulty evaluation coefficient is set to a higher value.

[0070] Then, the evaluation reference values ​​under the three load modes are calculated by the following formulas: Evaluation reference value S=i1×j1+i2×j2+i3×j3+i4×j4+i5×j5.

[0071] 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.

[0072] 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.

[0073] More specifically, step S3 includes the following steps S31 to S33, which are performed according to the bearing mode determined in step S2.

[0074] Step S31, for the traditional mode, the aggregation node corresponds to the local dispatch, and the number of aggregation nodes is equal to the number of dispatching program-controlled switches (the main and standby are counted as two) of the local dispatch. The aggregation node in the traditional mode is directly determined without calculation.

[0075] Step S32, for the dispatching mode, the aggregation nodes correspond to the local dispatching and the county dispatching, and the number of aggregation nodes is equal to the sum of the number of dispatching program-controlled switches (the main and standby are counted as two) of the local dispatching and the number of dispatching program-controlled switches (the main and standby are counted as two) of the county dispatching. The aggregation nodes in the dispatching mode are directly determined and do not need to be calculated.

[0076] Step S33, for the subnet partitioning mode, it is specifically determined by the following steps S331 to S332.

[0077] Step S331, select the convergence node. According to the current provincial power dispatching exchange network circuit exchange system, the nodes include: provincial company convergence exchange center (C3), municipal company convergence exchange center (C4), convergence exchange station, terminal exchange station (T). The core node is selected at the main and standby dispatching or second convergence point of each municipal company. Among them, "second convergence point" is a prior art and a special term in this field, which refers to the second convergence point in the dispatching exchange network.

[0078] For the aggregation nodes of subnet partitions in various cities, it is recommended to select sites with voltage levels of 220kV and above within the subnet partitions to which they belong. The specific conditions can be referred to as follows. The selected site must meet at least one of the following conditions: 1) Prefer sites with better equipment room locations and power supply conditions; 2) Reliable sites for optical cable resources; 3) Sites with rich transmission resources; 4) Nodes / sites where services such as source / load stations and centralized control centers are concentrated.

[0079] Step S332, determine the number of nodes: (1) Step S3321, count the number of sites of each voltage level in the subnet, and then preliminarily select and estimate the number of aggregation nodes. Specifically, count the number of sites of each level according to the regional funding situation (such as Table 6, where sample data is filled in a certain subnet A; this Table 6 is equivalent to further subdividing the subnet and specific sites on the basis of Table 1), and then (under the specific situation of Table 6) select and estimate the number of aggregation nodes according to the principle of step S331.

[0080] Table 6 Statistics of the number of sites

[0081] Then, according to Table 5 (the required number of bearer devices under the subnet partitioning mode), the bearer device configuration principle is determined to obtain the following Table 7 (the table is sample data and only shows subnet A. In fact, this statistics is also performed on other subnets in the target area).

[0082] Table 7 Equipment demand statistics

[0083] (2) Step S3322, determine the equipment configuration requirements. Specifically, according to the results of step S3321 (Table 6 and Table 7), the equipment capacity is calculated according to the subnet partitioning mode (for example, as shown in Table 8 below, which is sample information), and the capacity and number of scheduling program-controlled switch equipment required for each subnet are obtained; the number of scheduling program-controlled switch equipment obtained is used as the number of aggregation nodes selected for each subnet partition.

[0084] Table 8 Equipment capacity calculation table

[0085] 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 equipment is configured as 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.

[0086] Preferably, after step S332, step S333 is also included, and step S333 is a service coverage and power supply partition matching check, which specifically includes the following contents. According to the number of aggregation nodes and equipment capacity preliminarily determined in step S332, combined with the power supply partition (subnet), check whether the aggregation nodes in each power supply partition (subnet) can carry all dispatch telephone services in the power supply partition (subnet) where it is located, and whether there is no overload or underload phenomenon of the aggregation node; if so, the check is passed; if not, increase the network aggregation node or adjust the equipment capacity to meet the service access, and check again until all services meet the load (until the check is passed); determine the aggregation node and number based on the scheme that passes the check.

[0087] The verification method is as follows: for the actual number of sites X, the number of scheduling 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 L≥2, M3≥2×N, N / M2≤64, and X / L≤64 in the same subnet partition. Specifically, the relationship and proportion between the quantities can be flexibly verified according to the actual situation in different regions, taking into account service coverage, redundancy, and bearer security. As a supplementary explanation, since the nodes need active and standby redundancy, at least 2 are required, so L needs to be greater than 1, and the aggregation nodes need to be set in pairs, so L≥2 is required. The number of configured IP users needs to be greater than the actual number of voice channels, preferably 2 times, and based on redundancy considerations, 1 is used for 1 backup, so M3≥2×N is required. The number of channels of an IP board is commonly 128. Considering that "the number of configured IP users needs to be greater than the actual number of voice channels, preferably 2 times, and based on redundancy considerations, 1 is used for 1 backup", therefore, only 64 channels are used for an IP board, and the remaining channels are used for backup. Similarly, each pair of aggregation nodes is best to carry no more than 64 sites' telephone services, so N / M2 ≤ 64 is required. The maximum capacity of the MSTP service board is 64 channels, so the channel occupation part also matches it. Combined with the above equipment characteristics and security considerations, it is recommended that each pair of aggregation nodes carry no more than 128 sites, and a single point does not exceed 64 sites.

[0088] The following is a typical case to further illustrate the steps and effects of this method.

[0089] Taking the target area as a certain city as an example, according to the above calculation, the subnet partitioning mode is the optimal bearing mode. According to the primary planning of the power system, the communication network in the target area is divided into three subnets, namely: Northwest Subnet, Central South Subnet, and Eastern Subnet. Taking into account the optical cable resources, transmission resources, dispatching site density, and OTN equipment distribution, it is preliminarily estimated that two aggregation nodes are required in a subnet in the target area. Considering the rich transmission resources, two 220kV sites are selected as dispatching telephone number release points. Fill in the site quantity statistics in Table 6, such as Subnet A in Table 6 above.

[0090] Dispatching program-controlled switches are configured at provincial dispatching and backup dispatching / second convergence point, local dispatching and backup dispatching / second convergence point, and convergence nodes. The convergence node is used to converge the IAD devices of the subnet / aggregation area, and IP numbers are allocated to all substations at all levels through the IP user board. Dispatching switches are no longer configured except for sites of 500kV and above. IAD equipment is configured according to the required telephone demand. According to the above principles, the number of equipment configurations for each site is determined to obtain Table 7. According to the above principles, substitute into Table 8 to calculate the equipment configuration and the number of convergence points.

[0091] After calculation, it is found that two sets of 512-line dispatch machines and two aggregation nodes are required for the site volume of a certain subnet. Substituting the service coverage and power supply partition matching verification formula: 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 meet the carrying capacity of dispatch telephone services for all sites in the subnet.

[0092] 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 specific equipment models, manufacturers, etc., which can be carried out as needed, for example, it also includes the following content.

[0093] Based on the parameter comparison table of the mainstream dispatching machine host brands and models in the current market, we can summarize the general dispatching and equipment typical configuration table and the configuration calculation method of various user panels, see Table 9 below.

[0094] Table 9 Typical configuration and board configuration calculation table

[0095] It should be noted that Table 8 is intended for calculating the number of equipment required for the dispatching machine, in which the overall configuration is calculated based on the demand (actually two sets); Table 9 is a single set of configurations, which is intended to express the calculation method of the detailed configuration in the specific equipment. Among them, the greatest common divisor of the calculation refers to the number of equipment calculated according to the number of slots and the number of equipment calculated according to the number of lines (capacity). The greatest common divisor of the two is the number of equipment that needs to be configured. The capacity of a dispatching machine is 512 lines and 16 slots. For example, assuming that it is calculated that 17 slots are required (2 sets are required), and the required number of capacity lines is 500 (1 set is required), then 2 sets of 512-line dispatching machines are required.

[0096] As a supplementary explanation, only IP boards and 2M boards are mentioned in the previous article because these two items will change based on the number of sites when calculating the investment, and they are the main factors affecting the investment. The items added in this table are all other components inside the dispatching program-controlled switch, which are not affected by the number of sites and are almost fixed configurations (or affected by other factors and have no special rules). Among them, the multi-functional user board provides basic functional services for the dispatching machine (such as network management and telephone ringing, etc.). When selecting the configuration, each sub-frame requires 2 active and standby redundant configurations (the sub-frame can be regarded as 1 device). The recording user board provides recording function, and each set of dispatching desks needs to occupy 2 channels, so the number of dispatching desks × 2 ÷ the number of recording board single board channels is the number of recording boards that need to be configured. The number of dispatching desks (which can be regarded as telephones with special functions, generally arranged in the dispatching center, used to call each site) is determined according to actual operation needs. The dispatching board is the interface on the dispatching program-controlled switch used to connect to the dispatching desk, and the configuration method is the same as the recording board. The recording system is a device for storing recordings, and is connected to the dispatching program-controlled switch through the recording board as an interface. The number of dispatch desks × 2 = the total number of recording devices = the total number of recording boards. The dispatching machine generally has 16 slots, which can be used to install 16 boards; it has 512 lines (that is, 512 time slots), and different boards occupy different time slots. Therefore, when calculating the configuration, it is necessary to calculate the number of slots and time slots at the same time to determine the total capacity of the equipment, so the greatest common divisor is taken in the table.

[0097] 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 service 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 scheme can quickly determine the detailed configuration scheme of the dispatching switch equipment, and greatly improves 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 in the future.

[0098] As a supplementary explanation, the technical problems solved by this solution mainly include the following three aspects.

[0099] 1. Count business needs. According to the regulations and the operation needs of the power grid company, count the overall business needs (the number of telephone lines required). The effect achieved is that the calculation of the number of nodes and equipment capacity of the dispatch exchange must be based on business needs.

[0100] 2. Determine the network topology. Substitute known business requirements into different bearer modes for comparison (select the best bearer mode from the perspectives of investment, transmission channel occupancy, basic resource occupancy such as computer room and power supply, management and operation needs, etc.) to determine the appropriate network topology. The effect achieved is to formulate the comparison conditions of different bearer modes, and substitute the requirements into the formula to obtain the best result.

[0101] 3. Determine the equipment configuration. Calculate the detailed configuration of the bearer equipment according to the business requirements and the bearer mode. The effect achieved is that the equipment configuration method is formalized and the detailed equipment configuration can be calculated based on the known information.

[0102] 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 described embodiments 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 recorded in the aforementioned embodiments, or replacing some of the technical features therein by equivalents, 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, counting 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 of each voltage level in the target area, the number of services refers to the number of dispatch telephone lines, and the equipment required to carry the services includes dispatch program-controlled switches and dispatch IAD equipment; When determining the number of devices required to carry services, the number of dispatching program-controlled switches and the number of dispatching IAD devices required to carry services are counted based on three bearer modes; the three bearer modes are traditional mode, dispatching mode, and subnet partitioning mode. The traditional mode 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 the 220kV site is equipped with a dispatcher as the access layer equipment; 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 are selected in the partition; Step S2, based on the statistical results obtained in step S1, determining the optimal bearer mode solution for the target area through calculation and analysis; Among them, the dimensions considered when determining the optimal bearing 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.

2. The method for optimizing the deployment of a power dispatching program control system according to claim 1, characterized in that: In the traditional mode, the dispatching program-controlled switch equipment is configured at 330 / 220kV and above sites as the main mode of carrying dispatching calls, and the 2M relay is connected to the local dispatching, and the dispatching IAD equipment is configured as the backup mode of carrying dispatching calls. The dispatching program-controlled switch IP board of the local dispatching will issue the number for the dispatching IAD equipment; the dispatching IAD equipment is configured at 110 / 66kV sites as the main / backup mode of carrying dispatching calls, and the dispatching program-controlled switch IP board of the local dispatching will issue the number for the dispatching IAD equipment; the dispatching IAD equipment is configured at 35kV sites as the main mode of carrying dispatching calls, and the dispatching program-controlled switch IP board of the local dispatching will issue the number for the dispatching IAD equipment; in the traditional mode, the county dispatching and centralized control only configure the dispatching desk, and the dispatching IAD equipment is used as a replacement for the original PCM equipment; In the dispatching mode, the dispatching program-controlled switch equipment is configured at 750 / 500kV and above sites as the main mode of carrying dispatching calls, and the 2M relay is connected to the local dispatching. The provincial dispatching and local dispatching are respectively configured with dispatching IAD equipment as the backup mode of carrying dispatching calls, and the dispatching program-controlled switch IP boards of the provincial and local dispatching are used to place numbers for the dispatching IAD equipment; at 330 / 220kV sites, the provincial dispatching and local dispatching are respectively configured with dispatching IAD equipment as the main / backup mode of carrying dispatching calls, and the dispatching program-controlled switch IP boards of the provincial and local dispatching are used to place numbers for the dispatching IAD equipment; at 110 / 66kV sites, the local dispatching and county dispatching are respectively configured with dispatching IAD equipment as the main / backup mode of carrying dispatching calls, and the dispatching program-controlled switch IP boards of the local and county dispatching are used to place numbers for the dispatching IAD equipment; at 35kV sites, the dispatching IAD equipment is configured as the main mode of carrying dispatching calls; in the dispatching mode, the county dispatching is configured with a dispatching program-controlled switch, and the centralized control is only configured with a dispatching desk, and the dispatching IAD equipment is used 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 for carrying dispatching calls, and 2M relays are connected to the aggregation node in the partition to which it belongs. Dispatching IAD equipment is configured at the subnet aggregation node as the primary / backup mode for carrying dispatching calls, and the dispatching program-controlled switching equipment IP board of the subnet is used to issue numbers; dispatching IAD equipment is configured at 330 / 220kV and 110 / 66kV sites as the primary / backup mode for carrying dispatching calls, and the dispatching program-controlled switching equipment IP board of the subnet aggregation node of each partition is used to issue numbers; dispatching IAD equipment is configured at 35kV sites as the primary mode for 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, and 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 network topology of the traditional mode is that the provincial dispatching, local dispatching and stations with voltage levels of 330 / 220kV and above are equipped with corresponding dispatching program-controlled switches, and the county dispatching and centralized control are equipped with dispatching desks; stations with voltage levels of 330 / 220kV and above are also equipped with corresponding dispatching IAD equipment; stations 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 stations with voltage levels of 330 / 220kV and above; the local dispatching program-controlled switches are respectively connected to the dispatching program-controlled switches of stations with voltage levels of 330 / 220kV and above, the local dispatching IAD equipment and the dispatching IAD equipment of stations with voltage levels below 220kV; the equipment required for carrying services at stations of each voltage level is connected to dispatching telephones; The network topology of the dispatching mode is that the provincial dispatching, local dispatching and county dispatching are all equipped with corresponding dispatching program-controlled switches, and the centralized control is equipped with a dispatching desk; 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 county dispatching; 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; 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 local dispatching; the equipment required for the bearer business of 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 lower than 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 dispatching telephones.

4. The method for optimizing the deployment of a power dispatching program control system according to claim 1, characterized in that: In step S2, the dimension considered when determining the optimal carrying mode solution for the target area through calculation and analysis includes the total investment; step S2 includes the following step S21; Step S21, respectively calculating the total investment under the three bearing modes, specifically including the following contents: Based on statistics, we get: the number of sites at each voltage level is 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; County survey quantity 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, the number of IADs at 1000kV sites n1, the number of IADs at 750 / 500kV sites n2, the number of IADs at 330 / 220kV sites n3, the number of IADs at 110 / 66kV sites n4, and the number of IADs at 35kV sites n5; Equipment 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 in the dispatch mode is: ； The total investment in subnet partitioning mode is: ； Step S22, respectively calculating the total number of transmission channels under the three bearer modes, specifically includes the following contents.

5. The method for optimizing the deployment of a power dispatching program control system according to claim 4, characterized in that: The total investment for the three bearer modes is as follows 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 in 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.

6. The method for optimizing the deployment of a power dispatching program control system according to claim 4, characterized in that: 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 including the following contents: Based on statistics, we also get: 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.

7. The method for optimizing the deployment of a power dispatching program control system according to claim 6, characterized in that: In step S2, the dimensions considered when determining the optimal bearer mode solution for the target area through calculation and analysis also include other dimensions, and the other dimensions include at least one of the space occupancy of the computer room, the occupancy of power resources, and the difficulty of operation and maintenance; 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 transmission channel weight i2, computer room space occupancy weight i3, power resource occupancy weight i4, and operation and maintenance difficulty weight i5. Then, the evaluation coefficients of different dimensions are defined; Compare the total investment under the three modes, set the evaluation coefficient of the lowest total investment as 1, and determine the total investment evaluation coefficient j1 under the three modes respectively according to the ratio of 0.1 reduction for every increase of 1 million yuan in the lowest total investment; Compare the total number of transmission channels in the three modes, set the evaluation coefficient of the lowest total number of transmission channels as 1, and determine the evaluation coefficient j2 of the total number of transmission channels in the three modes respectively according to the ratio of reducing the evaluation coefficient by 0.1 for every 10 channels added, taking the lowest total number of transmission channels as the benchmark; Compare the computer room space occupancy in the three modes, set the lowest computer room space occupancy evaluation coefficient as 1, and use the lowest computer room space occupancy as the benchmark, and determine the computer room space occupancy evaluation coefficient j3 in the three modes according to the ratio of reducing the evaluation coefficient by 0.1 for each additional cabinet position; Compare the power resource occupancy in the three modes, set the evaluation coefficient of the lowest power resource occupancy to 1, and use the lowest power resource occupancy as the benchmark, and determine the power resource occupancy 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 by 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.

8. The method for optimizing the deployment of a power dispatching program control system according to any one of claims 1 to 7, characterized in that: The method further includes step S3, based on the bearer mode determined in step S2, further determining the aggregation node selection method and the number of aggregation nodes of the program-controlled dispatching 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; Step S31, for the traditional mode, the aggregation node corresponds to the local dispatching, and the number of aggregation nodes is equal to the number of dispatching program-controlled switches of the local dispatching; Step S32, for the dispatching mode, the aggregation nodes correspond to the local dispatching and the county dispatching, and the number of aggregation nodes is equal to the sum of the number of dispatching program-controlled switches of the local dispatching and the number of dispatching program-controlled switches of the county dispatching; Step S33, for the subnet partitioning mode, specifically adopt the following steps S331 to S332 to determine; Step S331, selecting a sink node for each subnet respectively; The aggregation node is a site with a voltage level of 220kV or above selected within the subnet partition to which it belongs, and the selected site meets at least one of the following conditions: 1) Sites with good equipment room locations and power supply conditions; 2) Reliable sites for 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 respectively; Wherein, for each subnet, the following steps S3321 and S3322 are included; Step S3321, counting the number of sites of each voltage level in the subnet, and then preliminarily selecting and estimating 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 for the subnet; the obtained number of scheduling program-controlled switch equipment is used as the number of aggregation nodes selected for each subnet partition.

9. The method for optimizing the deployment of a power dispatching program control system according to claim 8, characterized in that: After step S332, step S333 is also included; step S333 is a service coverage and power supply partition 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.

10. The method for optimizing the deployment of a power dispatching program control system according to claim 9, 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 standard is L≥2, M3≥2×N, N / M2≤64, and X / L≤64 within the same subnet partition.

Images