SCADA system, the application of the Company in Da

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SCADA system, the application of the Company in Dalian

Secretary of the production scheduling system consists of an operations control center, two gas production plants, supply stations 8 and 60 regulator stations. Gas control and supervision system is a centralized,[link widoczny dla zalogowanych], unified control, decentralized control of the Distributed Computer Network Monitoring System,[link widoczny dla zalogowanych], through the communication network will be distributed throughout the city gas production plant, supply stations and distribution stations, offices and streets connecting regulator together to accomplish real-time system monitoring and dispatch management. Gas production scheduling system for the Distributed Monitoring System, is divided into three layers: the top of the company dispatch control center DCC; the second layer is made of two gas production plants,[link widoczny dla zalogowanych], eight supply station station control system consisting of SCS and 60 transfer pressure stations in the remote terminal station RTU, 60 个 regulator stations, including 50 common regulator stations, five pipe network peripheral stations, five large industrial user station; the third is under the jurisdiction of the station control system, the terminal station LCM. DCC on the gas pipe network in the operating condition of all sites in real-time monitoring. To grasp the operational status of the network and the network parameters to adjust based on the transmission of various data and information in order to achieve optimization of the gas pipe network, the realization of economic, rational and reliable operation. SCS received within each of the terminal site LCM data. Grasp the operating condition of each parameter, and frequency of the network through a wireless point and transmit data to the DCC and information, while accepting DCC command station within the timely adjustment of operating conditions. Regulator station RTU can be run independently within the parameters of site monitoring. And accept the supervision and management of DCC. When the individual RTU fails, the system does not affect the normal operation of other sites. DCC and SCS, RTU line between the use of digital circuits, spread spectrum, wireless point-frequency communication, etc., using a star topology connection. Point-frequency wireless communication to the company as the central dispatch center DCC. Foreign Trade Building, the relay point by point to multipoint radio frequency link with the communications regulator station 60. Frequency communications equipment including wireless point communications processor MCP-T, transit equipment MDSP20, digital radio MDS2710. Frequency is 232.525MHz (downlink) and 225.525MHz (uplink). 3 Gas production scheduling system features (1) system maintainability. System hardware and software to maximize the use of \To enhance the maintainability of the system and ensure future scalability. To ensure reliable operation of critical equipment and its functions are to take redundancy. (2) system scalability. Use of hardware and software resources are left a certain margin. When the need to increase the RTU or the detection point, only the system configuration changes. Without the need for programmers to re-design process. System database can be requested by the user, altered. Programmers do not need to re-design. (3) security alarm systems and lightning protection. Gas regulator stations are equipped with the concentration of test equipment, when the concentration exceeds the safety value, may issue a warning signal, transmission control center, to provide basis for decision making timely processing of the accident. The stations use the 220V AC power and wireless point-frequency antenna systems, are equipped with lightning protection equipment to prevent lightning damage to the system. (4) rigorous grounding system. System has good ground, including ground protection, equipment grounding and lightning protection systems. (5) explosion-proof measures. System, all devices are installed in a safe place, use explosion-proof equipment instrumentation structure. 4 Conclusion (1) After completion of the system, dispatchers can provide comprehensive information systems, real-time control system operating parameters and the network operating conditions. Better address the supply and demand, to meet the industrial and civilian needs. Improve the scheduling and analysis of the accident found that the predictability of the accident. Once the abnormal, you can take effective measures to prevent accidents and the spread and ensure the safety of gas pipeline system in order to protect state property and the safety of life and property,[link widoczny dla zalogowanych], has significant safety benefits. (2) After completion of the system, according to the network operating conditions and operating data and other relevant information, conduct a comprehensive analysis, optimizing, optimization of production, the preparation of a reasonable and economical gas supply program, the entire gas pipeline system in the economic and rational cases run. Save manpower, material resources, gas supply, reduce environmental pollution. (3) gas in the production, storage, distribution, supply organization and management process more rational, efficiency is greatly improved. Dalian Gas Company production scheduling system in operation, has been running smoothly. And dispatching, balancing the pressure in the pipe network streets playing an increasingly important role. In the future,[link widoczny dla zalogowanych], we plan to develop the gas pipe network geographic information system. You can also use the data accumulated in the pipe network simulation analysis, load forecasting and trend analysis to achieve real-time accident prediction and warning; the establishment of emergency repair scheduling subsystem.