| Aimed at JinShao hydropower station, this paper presents the design of hydropower unit's computer supervisory control system. Being the top main unit of computer supervisory control system,the property of supervisory control unit of hydropower station unit affects the whole computer supervisory control system. Combined with the feature of hydropower station, the structure of computer supervisory control system and the technique of PLC and LCU are given in the paper. The paper also presents the design and the development of computer supervisory control system of JinShao hydropower station , including the structure design, hardware and software design, system communication, etc. The computer supervisory control system of JinShao adopts open system and distributive structure, which is composed of main control unit and LCU. PLC is the nucleus of LCU, and 100M ethernet is used to connect LCU with main control unit. Modsoft is used by PLC. And Intouch is used as supervisory control platform in the system. The system is chosen the layering distributing type computer supervising system structure model . According to power station control hierarchy and object , computer ( lower machine ) and control unit are at present supervised to level computer ( superordinate machine ) in installation power station at present . Two on stage computer , three undercalculation machines and seven sets of control units at present and printers are set up altogether to the computer supervising system The double operator of superordinate computer works at the station , hence his merit ability will be moved equipment state supervision and the issuing operating instruction operation including management , database administration to the whole power station computer supervising system , online off-line calculation merit ability , accident and the analysis handle of barrier as well as to full owner of a factory and decide value modification , picture display , real time supervision and automatic voltage regulating ( AVC ) reaches automatic generates electricity controls ( AGC ) etc the merit ability Superordinate machine and undercalculation machine by way of the Ethernet bus are linked together to be met , and data transmission speed is not smaller than 100Mbps . The undercalculation machine is linked together with the communication mouth of corresponding unit PLC respectively . Two printers are disposed in the central control room , and are used to print various information and report form . Seven sets of at present control units are : Two units various are set up two sets of control units at present , and fixing up respectively at present each machine side , one set of control unit at present being set up to the public , and fix up that the seepage pump is set up one set of control unit at present in the middle accuse indoor , and it is other to fix up at the seepage pump , and the sky one set of control unit at present press is fixed up respectively in the sky press room The superordinate machine uses Windows NT as the operating system terrace . Its safety and reliable is had the help wizard not again at the operation interface of Windows 98 and nothing place , and possesses big and powerful network function , can support the visit that reaches 256 remote clients Moreover Windows NT possesses to lead up merits such as mould multitasking ability and opening property etc , and it is more convenient and nimble to make the application move The application software uses configuration industry control software : The InTouch software of American Wonderwarecorporation . This software is living to be in the leading position inside the scope of boundary at present , and forms by several packages , and can accomplish can looking at , capturing data , extending external module /'s system , history trend and incident handle and warning merit abilitys such as record , report form and analysis tool etc . The various control unit ( LCU ) at present is according to the principle of on the spot handle , and gathers an operating parameter and a state of cellular production course . The control level in power station is responsible for coordinating and managing the various work of control unit at present , concerned information of collection and corresponding handle entry , display , holding and dump , renewal real-time data warehouse . Can that the work operator stands b y way of the human-machine interface logarithm according to warehouse and picture online modification and is in progress be man-made fixes and sets up the work such as supervision state and modification limit value etc By way of the communication processing machine and the corresponding optical fiber channel moves that the dedicated channel realizes with the electrical network dispatching center communication with far away . The communications of system such as observess and predict with the power station regimen by way of computer interface equipment and fire warning and water engineering installation safety monitoring etc The various communication with cell each LCU of gate of station of power station level is realized in the local network by way of the data bus Use in GPS's satellite clock synchronization system implementation supervising system the clock synchronization of each connectionAt present this system is in the operating course , and stablizies reliablely , and is easy to operate , and has satisfied the Jin Shao hydroelectric power station at northeast electrical network medium tune peak frequency modulation and position that the accident is reserved . Has realized the water and electricity unit " nobody is on duty , seldom person's value is guarded " the run mode , the operating of safety for the unit , economy and reliable has provided the guaranty... |
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