Power distribution automation standby dispatching system construction method

Abstract

The invention relates to the technical field of power distribution dispatching, in particular to a power distribution automation standby dispatching system construction method, a standby dispatching system which can be intercommunicated and interconnected with a main dispatching system is newly built, and the standby dispatching system can be in direct data transmission communication with a power distribution terminal in wireless communication, a power distribution terminal in optical fiber communication and distribution network equipment in a transformer substation. And the wireless communication power distribution terminal convergent point, the optical fiber communication power distribution terminal and the in-station distribution network equipment convergent point of the transformer substation are respectively moved forward. The system has the functions of full-independent switching of the main system and the standby system, respective information transmission of all power distribution terminals and synchronous development of all services of the system, the application requirements of full-independent remote power distribution operation and maintenance, first-aid repair and regulation and control monitoring can be met without increasing the cost, and the distribution network dispatching safety operation level and the disaster recovery and supply protection capability are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of distribution dispatching, and particularly relates to a method for constructing a backup dispatching system for distribution automation. Background Art

[0002] With the development of the distribution network, the requirements for uninterrupted monitoring and real-time control of distribution network equipment are getting higher and higher. The currently constructed distribution automation system can meet the operation monitoring and control of the distribution network, and has functions such as data acquisition, fault handling, and analysis and application, solving the application requirements of on-site distribution operation and maintenance, emergency repair, and regulation monitoring.

[0003] However, the core equipment and communication channels of the current distribution automation system are all configured at a single point. In the event of special situations such as extremely bad weather or social emergencies, there is a problem that the city's distribution network regulation business is paralyzed and the distribution network regulation function cannot be exercised normally, threatening the regional power consumption safety. It is urgent to promote the construction of the distribution system.

[0004] However, the construction of the backup dispatching system for the current domestic distribution automation system is limited by the large number of terminals, the high cost of dual transformation, and the lack of other technical means, and cannot meet the construction of a fully independent backup dispatching system. After consulting, there is no relevant research on the construction of the backup dispatching of the distribution automation system at home and abroad. The literature "Technical Research on the Access Mode of Distribution Automation Terminals in the Distribution Network Backup Dispatching System" proposes a method for accessing distribution automation terminals to the distribution network backup dispatching system through NAT conversion equipment, and solves the data synchronization and acquisition problems of the power grid backup dispatching system by establishing a cloud backup dispatching automation master station system. This method can indeed realize the remote backup of the distribution automation system, but there are two major problems. One is that only the dual-end forwarding backup is carried out from the data, and there are still problems with the failure of the cloud service operator for the cloud service hardware, and it is uncontrollable; the other is the security problem. The distribution automation system belongs to an information system, and its security level is the third level, with a relatively high security level. If the backup dispatching is deployed in the cloud, it will bring problems such as network security attacks and hacker attacks and defenses, and the security is poor. Therefore, the domestic backup dispatching construction is limited by the large number of terminals, the high cost of dual transformation, and the lack of other technical means, and cannot meet the construction of a fully independent backup dispatching system. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a method for constructing a backup dispatching system for distribution automation, which can realize the construction requirements of a fully independent backup dispatching system, meet the full switching of the three types of communication access of substation 10 kV distribution network equipment, wireless communication distribution terminals, and optical fiber communication distribution terminals, and proposes a technical route involving dual transmission on the full-service data communication side and independent regulation of the backup dispatching, with functions of full-independent switching of the main and backup systems, separate information transmission of all distribution terminals, and synchronous development of all system services.

[0006] The present invention is realized by the following technical solutions:

[0007] Provide a construction method for a backup dispatching system for distribution automation. Build a backup dispatching system that can communicate with the main dispatching system. The backup dispatching system can directly transmit data with distribution terminals for wireless communication, distribution terminals for optical fiber communication, and in-station distribution network equipment in substations respectively, and move forward the convergence points of wireless communication distribution terminals, optical fiber communication distribution terminals, and in-station distribution network equipment in substations respectively.

[0008] Further, the forward movement of the convergence point of the wireless communication distribution terminal specifically includes adding a router in Operator's Machine Room I that can communicate with the main dispatching system's data. It is connected to the core convergence I of Operator's Machine Room I to receive base station data. The data channel is split into two at the downstream. One end is connected to the main dispatching system, and the other end is connected to the backup dispatching system; during normal operation, data is directly transmitted to the main dispatching system through the router, and at the same time, the main dispatching system synchronizes the data to the backup dispatching system; in case of an abnormal fault, the router automatically switches to the backup dispatching system within 50 ms, and the wireless terminal data is directly transmitted from the terminal side to the backup dispatching system.

[0009] Furthermore, it also includes adding Operator's Machine Room II with a different geographical location from Operator's Machine Room I and capable of receiving base station data. The core convergence I of Operator's Machine Room I and the core convergence II of Operator's Machine Room II can communicate with each other, and data communication between the core convergence II of Operator's Machine Room II and the backup dispatching system is through a backup channel.

[0010] To meet the full redundancy backup and disaster tolerance and redundancy management of operator's machine rooms, new business backup channels between core convergences at two different geographical locations in operator's machine rooms and backup channels from the two core convergences of operators to the operator's machine room where the backup dispatching location is located are added, forming a port shape structure and a dual-plane layout at the metro equipment layer of operator's machine rooms. It can not only meet the off-site backup of the power supply company system but also achieve the backup of the dedicated network channels of the terminal communication operator company's equipment.

[0011] Further, the forward movement of the convergence point of the optical fiber communication distribution terminal specifically includes building a backup optical fiber path between the substation terminal PTN and the backup dispatching system; during normal operation, the optical fiber terminal data is directly transmitted to the main dispatching system and synchronized to the backup dispatching system through the main dispatching system, and a hot standby channel for optical fiber transmission based on the VRRP virtual redundancy protocol is built. In case of an abnormal fault, it automatically switches to the backup optical fiber path of the backup dispatching system, and the optical fiber terminal data is directly transmitted to the backup dispatching system without passing through the main dispatching system.

[0012] Further, the forward movement of the convergence point of the in-station distribution network equipment in the substation specifically includes connecting the front-end server in the newly built backup dispatching system for distribution automation and the front-end server in the original backup dispatching system for dispatching automation through network communication. During normal operation, the substation data is directly transmitted to the main dispatching system; in case of an abnormal fault, the substation-end data is forwarded to the newly built backup dispatching system for distribution automation by the backup dispatching system for dispatching automation.

[0013] Preferably, a forward and reverse physical isolation device is installed in the network cable connection between the front-end server of the distribution automation backup dispatching system and the front-end server of the original dispatching automation backup dispatching system.

[0014] By adding a forward and reverse physical isolation device, a physically disconnected connection is created to prevent the spread of viruses and hacker attacks between networks. At the same time, specific data can be manually or scheduled to be transferred from one network to another within the scope permitted by the security policy to ensure border security protection.

[0015] Furthermore, the newly built distribution automation backup dispatching system and the original dispatching automation backup dispatching system are built in the same location.

[0016] By building in the same location, it is convenient for data transmission and communication between the two backup dispatching systems, ensuring the stable transmission of substation data.

[0017] Advantages of the present invention:

[0018] The present invention meets the application requirements of fully independent off-site power distribution operation and maintenance, emergency repair, and regulation monitoring, significantly improving the safe operation level of the distribution network dispatching and the disaster tolerance and power supply guarantee ability. The construction of the newly added backup dispatching system follows the principle of homogeneity of the main and backup systems. According to the new generation main station standard, the backup dispatching system is configured with 16 core servers such as a database and front-end acquisition; functional applications such as distribution network monitoring, feeder automation, and graphic model maintenance are deployed, and remote workstations are synchronously configured at each dispatching site, achieving "full redundancy" at the software and hardware levels. The main and backup dispatching systems have the same configuration and independent networks. The distribution terminals can smoothly establish communication with the backup dispatching system, truly realizing independent regulation and seamless connection.

[0019] The present invention has the advantage of low transformation cost. The fully independent distribution automation backup dispatching system established by adopting new technologies avoids the problem of high cost caused by double transformation of regional terminals and avoids power outages of users caused by terminal transformation.

[0020] The present invention has the advantages of short main and backup switching time and stable system operation. The two can monitor the system status of each other in real time. When a large-scale network interruption or serious equipment failure occurs in the main distribution network dispatching system, the backup dispatching system will send a main and backup switching request, which will be executed after manual confirmation, realizing minute-level switching.

[0021] The present invention has the advantage of requiring no maintenance for daily data. It builds multiple network transmission paths and realizes real-time synchronization through the master-slave system databases, access areas, etc., achieving a twin state where the master-slave system architectures are the same and physically independent. During daily operation, the terminal communicates with the master dispatcher, and the master dispatcher transmits data to the slave dispatcher system through the twin synchronization method. Similarly, when the slave dispatcher system operates, the slave dispatcher system transmits data to the master dispatcher system through the twin synchronization method. The system automatically realizes data sharing and second-level synchronization, ensuring the consistency, timeliness, and integrity of the data in the master-slave dispatcher systems and guaranteeing the anti-risk ability of information transmission.

[0022] The present invention has the advantage of simple data operation and maintenance. The master and slave systems are interconnected through mirroring, and the working mode of maintaining all the data parameters of the power grid model machines at one end and sharing them at both ends will be adopted. Only one maintenance by the operation and maintenance personnel is required for the master and slave systems, and the data is shared at both ends, which guarantees the anti-risk ability of information transmission and reduces the system maintenance workload and personnel operation and maintenance costs.

[0023] The present invention has the advantage of a wide promotion scope. It improves the ability of the distribution network dispatching to resist various accidents, natural disasters, and social emergencies, belongs to the leading domestic level, is applicable to the promotion and application of the distribution network specialty in the national electric power industry, and has a good promotion prospect. Brief Description of the Drawings

[0024] Figure 1 It is the overall structure data link diagram of the present invention.

[0025] Figure 2 It is the schematic diagram of wireless terminal communication in the present invention.

[0026] Figure 3 It is the schematic diagram of optical fiber terminal communication in the present invention.

[0027] Figure 4 It is the schematic diagram of communication of distribution network equipment inside the substation in the present invention. Detailed Embodiment

[0028] To clearly illustrate the technical features of this solution, the following describes this solution through specific embodiments.

[0029] As Figure 1 shown, a construction method for a distribution automation standby dispatching system includes building a new slave dispatching system that can communicate with the master dispatching system. The slave dispatching system can respectively perform direct data transmission communication with the distribution terminals with wireless communication, the distribution terminals with optical fiber communication, and the distribution network equipment inside the substation, and respectively move forward the convergence points of the wireless communication distribution terminals, the optical fiber communication distribution terminals, and the distribution network equipment inside the substation.

[0030] As Figure 2As shown in the figure, the forward shift of the wireless communication power distribution terminal aggregation point specifically includes adding a router in the operator's computer room I that can communicate with the main dispatching system's data. It is connected to the core aggregation I of the operator's computer room I to receive base station data, and the data channel is split into two when connecting downstream. One end is connected to the main dispatching system, and the other end is connected to the backup dispatching system. During normal operation, the data is directly transmitted to the main dispatching system through the router, and at the same time, the main dispatching system synchronizes the data to the backup dispatching system. In case of an abnormal fault, the router automatically switches to the backup dispatching system within 50 ms, and the wireless terminal data is directly transmitted from the terminal side to the backup dispatching system.

[0031] It also includes adding operator's computer room II that is geographically different from operator's computer room I and can receive base station data. The core aggregation I of operator's computer room I and the core aggregation II of operator's computer room II can communicate with each other, and data communication is carried out between the core aggregation II of operator's computer room II and the backup dispatching system through a standby channel.

[0032] As Figure 3 shown in the figure, the forward shift of the optical fiber communication power distribution terminal aggregation point specifically includes building a standby optical fiber path between the newly built substation station-side PTN and the backup dispatching system. During normal operation, the optical fiber terminal data is directly transmitted to the main dispatching system and synchronized to the backup dispatching system through the main dispatching system, and a hot standby channel for optical fiber transmission based on the VRRP virtual redundancy protocol is built. In case of an abnormal fault, it automatically switches to the standby optical fiber path of the backup dispatching system, and the optical fiber terminal data is directly transmitted to the backup dispatching system without passing through the main dispatching system.

[0033] As Figure 4 shown in the figure, the forward shift of the substation in-site distribution network equipment aggregation point specifically includes connecting the front-end server in the newly built distribution automation backup dispatching system and the front-end server in the original dispatching automation backup dispatching system through network cable communication. During normal operation, the substation data is directly transmitted to the main dispatching system. In case of an abnormal fault, the substation-side data is transferred from the dispatching automation backup dispatching system and forwarded to the newly built distribution automation backup dispatching system.

[0034] A forward and reverse physical isolation device is installed in the network cable connection between the front-end server of the distribution automation backup dispatching system and the front-end server of the original dispatching automation backup dispatching system.

[0035] To facilitate data communication between switches, the newly built distribution automation backup dispatching system and the original dispatching automation backup dispatching system in this application are built in the same location.

[0036] The distribution automation system realizes the acquisition of information of 10 kV distribution network equipment in the substation. These information are directly transmitted between the substation and the distribution automation system through the dispatching data network, and the data is transmitted to the front-end server of the distribution automation system.

[0037] The dispatching automation system realizes the centralized monitoring of the operation of power grid equipment above 35 kV across the region, including the centralized monitoring of all equipment data at the substation terminals of each voltage level. These information are transmitted directly between the substation terminal data and the dispatching automation system through the dispatching data network, and the data are transmitted to the front-end server of the dispatching automation system.

[0038] Taking Heze Power Supply Company as an example, the backup dispatching system of the dispatching automation system was built in 2014. It has directly collected all data at the substation terminals, including the information of 10 kV distribution network equipment of each substation, and transmitted them to the front-end server of the backup dispatching system of the dispatching automation system. By connecting the backup dispatching system of the dispatching automation system and the backup dispatching system of the newly built distribution automation through network cables, the relevant substation data in the front-end server of the backup dispatching system of the dispatching automation system are transmitted to the front-end server of the backup dispatching system of the newly built distribution automation, so that the substation data can be directly obtained, without the need to debug and configure one by one from the substation terminals, thus realizing the rapid acquisition of substation data.

[0039] Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be realized by or adopted from the prior art, which will not be elaborated here; the above embodiments and drawings are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. The present invention has been described in detail with reference to the preferred embodiments. Those of ordinary skill in the art should understand that any changes, modifications, additions or substitutions made by those of ordinary skill in the art within the scope of the essence of the present invention do not depart from the purpose of the present invention and should also fall within the scope of the claims of the present invention.

Claims

1. A construction method for a backup dispatching system of distribution automation, characterized in that: Build a backup dispatching system that can communicate with the main dispatching system. The backup dispatching system can directly communicate with the data of distribution terminals with wireless communication, distribution terminals with optical fiber communication, and in-station distribution network equipment in the substation respectively, and move forward the convergence points of wireless communication distribution terminals, optical fiber communication distribution terminals, and in-station distribution network equipment in the substation respectively.

2. The construction method of the distribution automation backup dispatching system according to claim 1, characterized in that: The forward movement of the convergence point of wireless communication distribution terminals specifically includes adding a router in Operator's Machine Room I that can communicate with the main dispatching system data. The router is connected to the core convergence I of Operator's Machine Room I to receive base station data. The data channel is split into two at the downstream. One end is connected to the main dispatching system, and the other end is connected to the backup dispatching system. During normal operation, data is directly transmitted to the main dispatching system through the router, and at the same time, the main dispatching system synchronizes the data to the backup dispatching system. In case of abnormal failure, the router automatically switches to the backup dispatching system within 50 ms, and the wireless terminal data is directly transmitted to the backup dispatching system from the terminal side.

3. The construction method of the distribution automation backup dispatching system according to claim 2, characterized in that: It also includes adding Operator's Machine Room II with a different geographical location from Operator's Machine Room I and capable of receiving base station data. The core convergence I of Operator's Machine Room I and the core convergence II of Operator's Machine Room II can communicate with each other, and data communication between the core convergence II of Operator's Machine Room II and the backup dispatching system is carried out through a backup channel.

4. The construction method of the distribution automation standby dispatching system according to claim 1, characterized in that: The forward movement of the convergence point of optical fiber communication distribution terminals specifically includes building a backup optical fiber path between the substation station-side PTN and the backup dispatching system. During normal operation, the optical fiber terminal data is directly transmitted to the main dispatching system and synchronized to the backup dispatching system through the main dispatching system. A hot standby channel for optical fiber transmission based on the VRRP virtual redundancy protocol is built. In case of abnormal failure, it automatically switches to the backup optical fiber path of the backup dispatching system, and the optical fiber terminal data is directly transmitted to the backup dispatching system without passing through the main dispatching system.

5. The construction method of the distribution automation backup dispatching system according to claim 1, characterized in that: The forward movement of the convergence point of in-station distribution network equipment in the substation specifically includes connecting the front-end server in the newly built distribution automation backup dispatching system and the front-end server in the original dispatching automation backup dispatching system through network cable communication. During normal operation, substation data is directly transmitted to the main dispatching system. In case of abnormal failure, the substation-side data is forwarded from the dispatching automation backup dispatching system to the newly built distribution automation backup dispatching system.

6. The construction method of the distribution automation standby dispatching system according to claim 5, characterized in that: Install a forward and reverse physical isolation device in the network cable connection between the front-end server in the newly built distribution automation backup dispatching system and the front-end server in the original dispatching automation backup dispatching system.

7. The construction method of the distribution automation backup dispatching system according to claim 5, characterized in that: The newly built distribution automation backup dispatching system and the original dispatching automation backup dispatching system are built in the same location.

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