CN116074321A - Multi-station communication optimization system in urban water management centralized control system based on load balancing mode - Google Patents
Multi-station communication optimization system in urban water management centralized control system based on load balancing mode Download PDFInfo
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- 238000005457 optimization Methods 0.000 title claims abstract description 13
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- 238000000034 method Methods 0.000 abstract description 5
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/14—Network architectures or network communication protocols for network security for detecting or protecting against malicious traffic
- H04L63/1441—Countermeasures against malicious traffic
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The multi-station communication optimization system in the urban water management centralized control system based on the load balancing mode comprises a local station, a regional centralized control center and a group centralized control center; the group centralized control center is connected with a plurality of regional centralized control centers, a plurality of regional centralized control centers in the regional centralized control centers are connected with a group of first load balancing clusters, and each group of first load balancing clusters comprises m first communication servers; each first communication server is used for carrying out acquisition, calculation and release of a part of real-time data; the first communication server is connected to the group centralized control center through a first real-time data bus. The plurality of local sites are connected with a second load balancing cluster, and the second load balancing cluster comprises n second communication servers; each second communication server is used for carrying out acquisition, calculation and release of a part of real-time data; the second communication server is connected to the group centralized control center through a second real-time data bus. The system has low burden; meanwhile, the method has the advantages of direct access of a large number of site communication, stable network communication performance and small external attack.
Description
Technical Field
The invention belongs to the technical field of station cluster control communication optimization, and particularly relates to a multi-station communication optimization system in a city water management centralized control system based on a load balancing mode.
Background
The water pipe house system is an important component of intelligent water service in a city, and a large number of water works such as water purifying plants, sewage pumping stations, drainage pumping stations and other hydraulic engineering facilities are arranged in the city, and most of electromechanical equipment can realize automatic monitoring. The plant station group and the pump station group are managed and regulated in a unified way, and the system has important effects on urban water environment treatment, flood control and drainage.
The centralized access of a large number of plant data to the built centralized control center is a huge and complex work, especially communication is a technical bottleneck, and the access of a large number of plant data often causes communication delay and congestion, the phenomenon of system data interruption is frequent, and the system availability is poor. Because the engineering coverage is large, the plant stations often span a wide area, the buildings are more, the real-time control is strong, the centralized control and management of engineering operation are very complex, and an advanced communication system is needed for supporting, so that the internal management information and the external exchange information are timely and accurate, and the high-efficiency and orderly management of the whole engineering is ensured.
The optimization method of the cluster control communication of the multiple stations is researched and developed by researching the conditions of the multiple stations in the prior art. The achievement provides technical standards and guidance for updating and reconstruction of a large number of stations and construction of new projects, and simultaneously provides a replicable and generalized scheme for station groups, thereby having important significance for promoting standardization and modernization of the stations.
At present, an OPC communication mode is adopted in the industry between a centralized control center and a plurality of stations in the field. However, OPC communication methods are complicated in actual operation, and problems such as data omission often occur. Data omission is a very complex problem, and it is generally difficult to find out which data is omitted, and great trouble is caused to subsequent maintenance and overhaul work. Any person can enter a completely open read-write permission to the whole system, and the control system can be overloaded by adding extra load to the control system or implementing an instruction of destroying the available writing equipment of an OPC client through an unlicensed or unsafe OPC server; the OPC client can add a huge number of data items to overload the control system; unauthorized persons may access the confidential data; there may be OPC server communications that do not meet OPC security specifications.
OPC is vulnerable to attacks because it uses a weak security mechanism. The security defect of the OPC protocol is that OPC is based on the Windows operating system and is easily affected by attacks against Windows vulnerabilities. Common host security issues can also affect the stability and security of OPC systems. For example: the weak password vulnerability system has a vulnerability, and Trojan viruses cause safety defects when the stability OPC protocol is operated; a large number of OPC hosts use weak security authentication mechanisms, even if the authentication mechanism is enabled, weak passwords are often used; many systems enable additional Windows services independent of the SCADA system, resulting in unnecessary running processes and open ports; due to the factors of maintenance window, explanatory problem, etc., the industrial network system is difficult to upgrade, so that unsafe authorization mechanism is still used.
Currently, due to the presence described above: (1) for the problem of unbalanced communication load between multiple pump stations or station groups and a centralized control center, partial station communication is blocked, data communication is affected, and meanwhile, other extra Windows services are started by OPC, so that the system burden is increased; (2) OPC servers in many industries are based on Windows operating systems and are susceptible to attacks against Windows vulnerabilities. (3) In a direct access system of a large number of stations, the problem of unbalanced communication load becomes a technical bottleneck affecting communication stability.
Disclosure of Invention
In order to solve the technical problems, the invention provides a multi-station communication optimization system in a city water management and control system based on a load balancing mode, which avoids the starting of other extra Windows services and has low system burden; meanwhile, the method has the advantages of direct access of a large number of site communication, stable network communication performance and small external attack.
The technical scheme adopted by the invention is as follows:
a multi-station communication optimization system in a city water management centralized control system based on a load balancing mode comprises the following steps: the system comprises a local site, a regional centralized control center and a group centralized control center;
the group centralized control center is connected with a plurality of regional centralized control centers, a plurality of regional centralized control centers in the regional centralized control centers are connected with a group of first load balancing clusters, and each group of first load balancing clusters comprises m first communication servers; each first communication server is used for carrying out acquisition, calculation and release of a part of real-time data; the first communication server is connected to the group centralized control center through a first real-time data bus;
the plurality of local sites are connected with a second load balancing cluster, and the second load balancing cluster comprises n second communication servers; each second communication server is used for carrying out acquisition, calculation and release of a part of real-time data; the second communication server is connected to the group centralized control center through a second real-time data bus.
The regional centralized control centers are all connected with a first video forwarding server, and the first video forwarding server is connected with a display screen of the group centralized control center.
The first real-time data bus spans a first control area comprising a plurality of first communication servers and a management area comprising a group centralized control center, a first isolation device is arranged between the first control area and the management area, and an information release system positioned in the group centralized control center acquires information through the first real-time data bus isolated by the first isolation device.
The plurality of local sites are connected with a second video forwarding server, and the second video forwarding server is connected with a display screen of the group centralized control center.
The second real-time data bus spans a second control area comprising n second communication servers and a management area comprising a group centralized control center, a second isolation device is arranged between the second control area and the management area, and the information release system positioned in the group centralized control center acquires information through the second real-time data bus isolated by the second isolation device.
The plurality of local sites are accessed into the group centralized control center, and three modes are included according to different importance of the local sites:
(1) the group centralized control center is communicated with the site SCADA and is not directly connected with the PLC;
(2) the group centralized control center is directly connected with the local site through PLC (programmable logic controller) in a communication way;
(3) the group centralized control center is in communication connection with the local site through an edge proxy, and is not directly connected with the PLC;
under the condition of adopting the mode (2) or the mode (3), the group centralized control center adopts a direct data acquisition and direct transmission mode, and does not depend on the original SCADA system of the local site.
The communication protocol supports a plurality of standards of a modbus serial port/TCP, IEC60870-5-104 and OPC-UA unified model.
The invention discloses a multi-station communication optimization system in a city water management and control system based on a load balancing mode, which has the following technical effects:
1) The system of the present invention supports direct access to a large number of site-to-site communications, greater than 300.
2) The system is developed by using a JAVA environment, is designed in a cross-platform manner, is not influenced by attack aiming at Windows loopholes, has stable network communication performance and is little attacked by the outside.
3) The invention provides a load balancing mode, avoids the starting of other extra Windows services, and has low system load.
Drawings
FIG. 1 is a schematic diagram of a regional centralized control center access group centralized control center.
Fig. 2 is a schematic diagram of a local/station site access group central control center.
Detailed Description
Examples:
a multi-station communication optimization system in a city water management centralized control system based on a load balancing mode comprises the following steps: 4 local sites, 6 regional centralized control centers and 1 group centralized control center according to administrative division;
(I), the regional centralized control center is accessed into a group centralized control center and is designed according to a distributed load balancing cluster mode, as shown in fig. 1:
the 1 group centralized control center is connected with 6 area centralized control centers, 3 area centralized control centers in the 6 area centralized control centers are connected with a group of first load balancing clusters, and each group of first load balancing clusters comprises 3 first communication servers; the first communication server is connected to the group centralized control center through a first real-time data bus. The regional centralized control centers are all connected with a first video forwarding server, and the first video forwarding server is connected with a display screen of the group centralized control center. And each first communication server is used for bearing the collection, calculation and release of a part of real-time data according to the load balancing strategy. The comprehensive application and the operator station respectively acquire real-time data from the first real-time data bus for display and control.
The first real-time data bus spans a first control area B containing 3 first communication servers and a management area A containing a group centralized control center, a first isolation device is arranged between the first control area B and the management area A, and information is acquired by an information release system such as a display large screen of the group centralized control center and the like after the information release system is isolated by the first isolation device.
The regional centralized control center is accessed to the group centralized control center and adopts a load balancing architecture, so that better real-time performance can be provided, the distributed cluster provides more expansibility for the system, the communication protocol adopts the IEC60870-5-104 standard, the real-time performance is strong, and the unified model standard is easier to maintain.
(II), accessing site data of the site/station to a group centralized control center, and designing according to a load balancing mode, wherein the load balancing mode is as shown in fig. 2:
the 4 local sites are all connected with a second load balancing cluster, and the second load balancing cluster comprises 4 second communication servers. According to the load balancing strategy, each second communication server is used for bearing the collection, calculation and release of a part of real-time data; the second communication server is connected to the group centralized control center through a second real-time data bus. The plurality of local sites are connected with a second video forwarding server, and the second video forwarding server is connected with a display screen of the group centralized control center.
The operator station obtains real-time data from the second real-time data bus for display and control. The second real-time data bus spans a second control area C containing 4 second communication servers and a management area A containing a group centralized control center, a second isolation device (network firewall) is arranged between the second control area C and the management area A, and information is acquired by an information release system such as a display large screen of the group centralized control center through the second real-time data bus isolated by the second isolation device.
The local/station data access group centralized control center can adopt three modes, and can adopt different communication modes according to different importance of stations:
(1) the group centralized control center is communicated with the site SCADA and is not directly connected with the PLC;
(2) the group centralized control center is directly connected with the local site through PLC (programmable logic controller) in a communication way;
(3) the group centralized control center is in communication connection with the local site through an edge proxy, and is not directly connected with the PLC;
the communication protocol supports a plurality of standards such as modbus serial port/TCP, IEC60870-5-104, OPC-UA unified model and the like. Under the condition of adopting the mode (2) or the mode (3), the group centralized control center adopts a direct data acquisition and direct transmission mode, and does not depend on the original SCADA system of the local site.
The data access based on the OPC-UA unified model is safer, more reliable and neutral (irrelevant to suppliers), and can meet the requirement that most local equipment is quickly accessed into a centralized control network. The communication process meets the requirements of EN50159, is established on the basis of an OPC-UA safety channel, and fully considers identity authentication, authorization, confidentiality, integrity, audit capability and the like.
According to the multi-station communication optimization system in the urban water management and control system based on the load balancing mode, software in a communication server is developed by using a JAVA environment, and cross-platform design is achieved, so that the system is not affected by attacks aiming at Windows vulnerabilities.
After the multi-station communication performance optimization system is adopted, the whole system is operated in an optimal state, so that the condition that single-point communication load is too high and the overall performance is not affected is avoided.
Claims (7)
1. A multi-station communication optimization system in a city water management centralized control system based on a load balancing mode is characterized by comprising the following steps: the system comprises a local site, a regional centralized control center and a group centralized control center;
the group centralized control center is connected with a plurality of regional centralized control centers, a plurality of regional centralized control centers in the regional centralized control centers are connected with a group of first load balancing clusters, and each group of first load balancing clusters comprises m first communication servers; each first communication server is used for carrying out acquisition, calculation and release of a part of real-time data; the first communication server is connected to the group centralized control center through a first real-time data bus;
the plurality of local sites are connected with a second load balancing cluster, and the second load balancing cluster comprises n second communication servers; each second communication server is used for carrying out acquisition, calculation and release of a part of real-time data; the second communication server is connected to the group centralized control center through a second real-time data bus.
2. The system for optimizing multi-station communication in a centralized control system of municipal water management and control based on a load balancing mode according to claim 1, wherein the system is characterized in that: the regional centralized control centers are all connected with a first video forwarding server, and the first video forwarding server is connected with a display screen of the group centralized control center.
3. The system for optimizing multi-station communication in a centralized control system of municipal water management and control based on a load balancing mode according to claim 1, wherein the system is characterized in that: the first real-time data bus spans a first control area comprising a plurality of first communication servers and a management area comprising a group centralized control center, a first isolation device is arranged between the first control area and the management area, and an information release system positioned in the group centralized control center acquires information through the first real-time data bus isolated by the first isolation device.
4. The system for optimizing multi-station communication in a centralized control system of municipal water management and control based on a load balancing mode according to claim 1, wherein the system is characterized in that: the plurality of local sites are connected with a second video forwarding server, and the second video forwarding server is connected with a display screen of the group centralized control center.
5. The system for optimizing multi-station communication in a centralized control system of municipal water management and control based on a load balancing mode according to claim 1, wherein the system is characterized in that: the second real-time data bus spans a second control area comprising n second communication servers and a management area comprising a group centralized control center, a second isolation device is arranged between the second control area and the management area, and the information release system positioned in the group centralized control center acquires information through the second real-time data bus isolated by the second isolation device.
6. The system for optimizing multi-station communication in a centralized control system of urban water management based on a load balancing mode according to claim 1 or 5, wherein the system is characterized in that: a plurality of local sites are accessed into a group centralized control center, and three modes are included according to different importance of the local sites:
(1) the group centralized control center is communicated with the site SCADA and is not directly connected with the PLC;
(2) the group centralized control center is directly connected with the local site through PLC (programmable logic controller) in a communication way;
(3) the group centralized control center is in communication connection with the local site through an edge proxy, and is not directly connected with the PLC;
under the condition of adopting the mode (2) or the mode (3), the group centralized control center adopts a direct data acquisition and direct transmission mode, and does not depend on the original SCADA system of the local site.
7. The system for optimizing multi-station communication in a centralized control system of municipal water management and control based on a load balancing mode according to claim 6, wherein the system is characterized in that: the communication protocol supports a plurality of standards of a modbus serial port/TCP, IEC60870-5-104 and OPC-UA unified model.
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