polo outlet online On the Water substation automat

43nike9485qt

On the Water substation automation technology trends

Layer of the main tasks are: (1) through two high-speed network summary of site-wide real-time data information, and constantly refresh the real-time database, historical database login time; (2) of the Statute of the relevant data in accordance with the established information sent to the dispatch or control center; ( 3) Receive operation control command or control center and turn on the interval level, process level execution; (4) has a full-line programmable control station operation blocking; (5) or with the station with local monitoring, human-computer link function , such as display, operation,[link widoczny dla zalogowanych], printing, alarm, or even images, sound and other multimedia functions; (6) has on the interval level, process level maintenance of all equipment, online, online configuration, on-line modify the parameters of the function; (7) with or prepared a substation fault automatic analysis and operator training functionality. 3 digital substation automation system network selection Shandong Water Conservancy / 3 2003 network system of digital substation automation system is the lifeblood of its reliability and rapidity of information transmission system are determined by availability. Conventional substation automation system a single set of protective device information collection and protection of algorithms run generally in the same CPU under the control of, and makes the synchronous sampling, A / D conversion, calculation, output control command to the entire process of rapid and easy, and all-digital sampling of information systems, command and control protection algorithm is the formation of collaborative networks to complete more than CPU, and how to control the sampling synchronization and protection orders fast output is a complex issue, the most basic requirement is a network adaptability is a key technology to improve the speed of network communication and appropriate communication protocol. If the use of common field bus technology, digital substation automation can not do the technical requirements. Currently Ethernet meteoric rise, has entered the field of industrial automation and process control, curing OSI seven layer protocol, speed of 100MHz for embedded Ethernet interface chip has a lot of control and the emergence of digital substation automation system used in all levels 100MHz Ethernet network network technology is feasible. 4 digital substation automation system development of the main problems in three levels, digital substation automation system is bottom-up phase of development. Currently, the main research areas focus on the process level, such as the intelligent switching equipment, optical transformer, the state detection technology and equipment research and development. Already have a mature experience of foreign and domestic are research and development,[link widoczny dla zalogowanych], and in some substantial progress has been made. But sum up, the main problems are: (1) intelligent appliances immature; (2) test equipment, test methods,[link widoczny dla zalogowanych], inspection standards, in particular the control of electromagnetic interference and compatibility with the test or the weak links. (Author: Shandong Provincial Water Conservancy Survey and Design Institute) (Continued from page 35) morning, has now completed construction of a certain amount of transmission network, program-controlled switching network, digital data network and other value-added network and the Internet node and the lower node (site) interconnection are set up in the SDH network platform. In terms of SDH to carry voice traffic can be successfully fulfilled the task of the network platform layer, carrying the traditional data services can also give full play to its wide area network wAN advantages, and avoid duplication of investment, taking into account the practical problems, SDH is more appropriate in the near future network platform (ie transmission network), should continue to develop. The IPoverATM IPoverSDlH technology due to overlap technique, although the technology to play a dominant ATM network can provide high-performance integrated communications services, but considering the short term multimedia services and the ATM will not scale too high prices of equipment in the near future and other factors, should not philosophy consider the use of its carrying IP and other services. It is both but can take advantage of value-added data transmission network is the characteristics of networks, ATM networks with the construction of Shandong Province, recently open data services for users to play its data network features, high-speed connection to meet the requirements of users. But also for the near future pave the way for large-scale open multi-media services, data and voice transmission now make up separate video service can not be good to meet the shortage. Of course, ATM technology may also be widely used in IPoverOptical before the time for the IP business as efficient network platform. Unlike the two technologies overlap, IPoverwDH technology and on the development of two technologies was not in the same period, and that is the IP aspects of its technical superiority,[link widoczny dla zalogowanych], so little time can, in the universal and the perimeter network routing switch Gigabit Ethernet to the case of the mainstream, to use its features to maximize line utilization and achieve true seamless access. (Author: Jinan, Shandong Communications Branch) j Meng jack 3. t P��n mT:
More articles related to topics：

buy ghd hair Delphi fast scan line image processin

[link widoczny dla zalogowanych]

moncler outlet Alkaloids of the two esterase isoen