Petroleum and petrochemical enterprises play an important role in the national economy and the local economy where they are located. To ensure the normal operation of relevant equipment in various links, such as oil exploitation, oil and gas transportation, production refining, petrochemical and so on, has become one of the important tasks of petrochemical enterprises. Sinopec has realized the platform transformation of the industrial monitoring system of its refining and chemical enterprises, built one of the largest and most extensive networked monitoring systems in China, and successfully realized the integration of video monitoring systems in refining and chemical, sales, pipeline and oilfield sectors.
Petroleum and petrochemical video monitoring application is divided into two parts, one is the industrial television system, mainly used in production; the other is the integrated security system, mainly used in the park security monitoring. In the past, not only the industrial television system and the security monitoring system were independent of each other, but also the production monitoring system used in each factory was not connected with each other. It can be said that “closed” and “exclusive” are the characteristics of these systems. With the continuous improvement of the comprehensive management level of production, life and other aspects of enterprises, especially the emergence of production scheduling and emergency system construction needs, it becomes more and more urgent to integrate and share the original industrial TV and security monitoring system.
Sinopec has 27 oil refining enterprises, 27 chemical enterprises, as well as a number of oil fields, sales and other plate enterprises, with a total of 400 Multiple sets of industrial TV systems are mainly divided into matrix (including some matrix systems with network hard disk recorders), hard disk recorders (including some network hard disk recorders), tape recorders, video servers, simple simulation systems (including traditional systems such as picture splitters), etc. Although the subordinate enterprises have set up perfect local area network, at present the industrial television of enterprises is mainly based on traditional analog system, and has the following characteristics:
·Each enterprise has many monitoring information points, complex system, many kinds of equipment and different structure;
·Industrial television has been used in petrochemical enterprises for a long time, and the systems of various enterprises are basically the coexistence of traditional systems and advanced digital systems;
·The equipment suppliers used by some enterprises have been restructured or their products have been transformed. At present, they are unable to provide relevant perfect services;
·Some enterprises have added digital network video monitoring system, but due to the variety, lack of industry standards, poor interconnection, and product quality;
·The export bandwidth of each enterprise and headquarters network platform is only 2Mbps, and there are a large number of information systems and application systems running on this platform, which can not meet a large number of video information transmission.
System architecture transformation solution
The reconstruction of the system architecture mainly focuses on the access transformation. Based on the current situation of industrial television system in refining and chemical enterprises, there are not only mainstream DVR system, but also obsolete pc-dvr system, and some analog matrix systems. Comprehensive analysis provides two access transformation schemes: one is pure hardware access transformation, the other is pure software access transformation. The two technologies have their own characteristics. Combined with the characteristics of the industrial television subsystem of the oil refining dispatching command system of each enterprise, the comprehensive scheme is finally selected. Combined with the current situation of 27 enterprises, the targeted access mode is selected to ensure data security, feasible expansion and advanced system.
Hardware access transformation is a kind of transformation method with the lowest technical difficulty. It is based on the reservation of all the original systems, all the front-end video resources are completely encoded and transmitted in a 1:1 non convergent way. Because this method does not make any changes and docking to the original system, and the coding, transmission and management are all completed by the same system, so the technical risk is low, the image effect is guaranteed, and the implementation cycle is short.
Software access transformation is a kind of transformation method with high technical difficulty. It is based on all the original systems, using the SDK development method to connect the digital equipment in the original system with a new management platform, such as DVR digital hard disk recorder equipment. This access mode makes full use of the resources that have been built by refining and chemical enterprises, and can quickly deploy the network monitoring of mainstream embedded DVR system.
Compare the advantages and disadvantages of the two access schemes, and finally determine the access transformation solution.
1. Digital docking of front-end DVR equipment based on software platform;
2. For the incompatible DVR devices or the enterprises that adopt a large number of digital monitoring systems, the platform is used to do SDK interface development or update DVR system software to realize digital docking;
3. For refining and chemical enterprises without digital equipment, hardware docking is used as a supplement.
According to the accumulation of the company in the IP field, in front of the multi brand, multi structure and complex deployment system, the specific functions such as viewing, checking, controlling, alarming and intercommunication are highly unified to achieve good compatibility effect. The specific transformation scheme of the system is shown in (Figure 1) architecture. Each refining and chemical enterprise involves different industrial TV systems. Through detailed investigation and classification, four types of industrial TV systems are obtained The transformation and access mode covers the transformation mode of the industrial television subsystem of the oil refining dispatching command system.
Mode 1: for refining and chemical enterprises whose front end is mainstream embedded DVR (some special pc-dvr and a large number of third-party digital monitoring systems), the system will deploy DVR access server to realize signaling and media processing and forwarding for all DVR equipment of the enterprise.
Method 2: if the front end is pc-dvr and the SDK and DVR manufacturer’s SDK technical support cannot be provided, the method of replacing the pc-dvr is adopted, and the hard disk video recorder is used to access the platform through the enterprise’s interface server.
Mode 3: for refining and chemical enterprises whose front end is non mainstream embedded DVR, because they can not provide SDK and SDK technical support from DVR manufacturers, they adopt the way of replacing the non mainstream DVR, adopt hard disk video recorder, and access the platform through the enterprise’s interface server 0.
Mode 4: for the industrial TV system with pure analog matrix front-end, the analog system (including the undeveloped V-s system and pure analog matrix system) can only be re coded by video encoder. If the number of analog front-end is small, the 1:1 full coding method is adopted; If the number of front-end analog matrix is large, the control interface of 4-channel encoder is connected to the control line of the matrix, and the platform switching function is used to control the output channel of the matrix and the pan tilt of the front-end camera, so as to reduce the number and investment of the encoder.
Hierarchical network of headquarters and branches
Sinopec’s branch companies or refining and chemical enterprise parks have their own large-scale monitoring systems, so the design of monitoring network must adopt the strategy of hierarchical and sub domain, that is, each branch company or refining and chemical enterprise will be used as a secondary platform (grass-roots domain) to realize the access of the internal monitoring system of the company or refining and chemical enterprise, and realize the management of all equipment and resources at the same time; As the first level platform (superior domain), the petrochemical headquarters can connect with the monitoring platform of each branch or refining enterprise, and then realize the call of the whole network video resources.
Adjust measures to local conditions and protect investment
The construction principle of the project is to “protect the original system investment of the enterprise to the maximum extent” and “try not to change the status quo of the enterprise industrial television”, so the design strategy of “software integration as the main, hardware integration as the auxiliary” is adopted. Due to the low bandwidth of its data network, it can not meet the needs of centralized storage of all images to the petrochemical headquarters, so the encoder with storage is deployed to realize local storage of monitoring images; Due to the short construction time and relatively new equipment, some enterprises need to protect the old monitoring system. According to the specific brand and model of enterprise equipment, they have carried out in-depth design and provided different access schemes. For the mainstream DVR equipment, the proxy server is deployed in the branch (refining and chemical enterprises) to realize the soft docking; for the non mainstream embedded DVR brand and pc-dvr brand, the VM video management server is uniformly managed by deploying the video distributor and the storage encoder.
Unified and open integrated solution
It provides four basic components including codec, network storage device, network system and management platform, which can provide Sinopec users with more comprehensive system services in the future.
Through the integration of the characteristics of the four components, the system architecture is optimized, the overall efficiency, reliability and cost performance of the system are improved, and the customized needs of users can be effectively met.
High definition and low delay video browsing
For the original mainstream system, development access and software integration can be realized. At this time, the definition of image reality mainly depends on the image quality of front-end equipment.
For the original non mainstream system, HD front-end equipment can be provided to achieve a clearer visual experience.
HD real-time image quality: fully in line with MPEG2 / / H.264 and other international standards, full D1 encoding bandwidth up to 4-8M (/ H.264) ～ 8-16m (MPEG2), the industry’s highest stream support, providing more image details and HD image quality.
HD playback image quality: independent storage stream based on TCP and iSCSI ensures reliability and high playback image quality.
High real-time performance: through the switch, it has real-time performance of less than 300 milliseconds, meeting the demanding needs of professional customers.
The system is safe and reliable
Sinopec emergency command and monitoring network system is a platform to provide video services for Sinopec users, and its biggest security risk lies in the management software platform. The software platform mainly includes each business management subsystem, which involves very important customer information and platform management information. The platform management subsystem also involves equipment configuration information, routing information and network management information. Therefore, measures must be taken to ensure its safety.
This software platform can realize the basic requirements of anti attack, anti illegal invasion, anti-virus, etc. it can also ensure that only legitimate users can access and use the services provided by the network video monitoring system, and ensure that users can only view the licensed front-end devices and the video monitoring images of the authorized monitoring points; To ensure the security of the video files saved in the system, it will not be viewed by other users or even system administrators.
The main work of the software platform is to complete the signaling processing of the business of real-time viewing and historical image playback, so the system resource occupation is small, the load is small, the failure rate is greatly reduced, and the reliability is greatly improved. Even if the server goes down, the video image can still be recovered in 3-5 minutes.
National implementation and after sale guarantee
In addition to the technical difficulties, Sinopec branches are all over the country: Xinjiang in the west, Hainan in the south, Zhenhai in the East, and most of North China in the north. How to ensure that multiple implementation teams carry out on-site investigation, installation and commissioning at the same time is the biggest challenge for suppliers. In the past, such projects often encounter difficulties in ensuring sufficient resource input from the original factory, which leads to serious delay or delay of project implementation cycle The whole network joint debugging is inefficient.
In this project, the national synchronous investment of resources guarantee met the synchronous progress of multiple implementation teams, and successfully completed the implementation and joint commissioning within the project planning cycle, ensuring that the industrial television subsystem of Sinopec production and operation system was put into use on schedule.
The industrial television subsystem of Sinopec’s oil refining production dispatching command system adopts digital video monitoring technology, and makes full use of the existing industrial television system resources and network resources of Sinopec and its subordinate enterprises to realize the management of its 27 subordinate enterprises The industrial monitoring system of 27 oil refining enterprises, 27 chemical enterprises and many oil fields and sales enterprises has been transformed into a platform. Through the mixed mode of software development and hardware integration, and relying on Sinopec’s special network platform, the integrated integration of petrochemical headquarters level industrial TV platform and the original new industrial TV system platform of various enterprises has been realized, and the current domestic scale industrial TV system has been successfully constructed The largest and most extensive network monitoring system.
The production command and dispatching hall, located on the 21st floor of Sinopec headquarters, often welcomes party and state leaders, local representatives of provinces and cities, and representatives of enterprises directly under the central government to visit and inspect. In the production command and dispatching center of Sinopec, information and data of Sinopec crude oil exploitation, transportation, production and sales can be accessed at any time, and industrial TV images of refining units of subordinate secondary units can also be called. In the future, besides the existing refining sector, industrial TV Resources of chemical industry, sales, oil field and other sectors will be expanded one after another to realize petrochemical industry The unified network integration of industrial TV. The dispatching center has become an interactive application platform integrating data acquisition and analysis, GIS geographic map, GPS global positioning, industrial video networking and other services.
In addition, Sinopec headquarters can conduct remote command on the scene of major accidents through the system, and remote access and backup of historical images of major events. On the afternoon of a certain day in 2010, a production accident occurred in a refinery branch. When the operator found it, he immediately called the police, and the branch immediately started the A-level emergency plan. Through the industrial television subsystem of the dispatching system, the group headquarters can remotely access the nearest camera to view the scene image for remote command and participate in the whole process of accident disposal. After 30 minutes, the accident was under control and no casualties were caused. At the same time, other production units were not affected and the production was normal.
Editor in charge: GT