The Research Of A Multi-substation Calling Up On-line Order Forming System

Formatting accurate operation orders is the premise and key for correct switching operation as well as the guarantee for steady performance of substations and power system. With the advancement of the automation level of power network in out nation, one electric operational troop need to finish switching operations of many nobody on duty substations in the same popedom, and the management of information in substations will be apt to centralize and intelligentize. Additionally, off line formation system has some disadvantages including bad data consistency and being incapable of scout real time. So it is imperative to carry out multi-substation on line formation system in central control of nobody on duty substations.The existing online formation system has the disadvantages of poor security of Real-time data and low efficiency of formation orders aiming at multi-substation. Therefore, a novel design philosophy and implement method of calling up online formation system of multi-substation operation orders was brought forward in this paper. The hardware structure of the system based on tri-level configuration including the host of SCADA , dispatching server and formation workstation, and the software structure of system was made up of main-thread of formatting orders and child-thread of obtaining real-time data. The real-time datum obtaining of the system based on calling up method, that is, obtaining dependent real-time datum of the corresponding substation alternatively in some given moments, which not only insure the consistency but also lighten the burden of network and sever greatly. The system can access to real time database of dispatch host flexibly by adopting multi-threads, which not only insure obtaining real time data but preventing network from barrage and formatting order pause caused by single-thread. High speed and credible technology of access to database-ADO(ActiveX Data Objects) was used in this system. The progress realized the repetitive data inquire and manage by inbuild transferring stored procedures of database, which enhance the operating efficiency and decrease the amount of data transmitting in network. In addition, the system enhances the reliability and security of the datum by introducing data checking mechanism.The system has been run in substation of Xianning Electricity Board. Now it is running in gear and meets the need of electric production. The system can scout the change of operating mode and the equipment states on the spot, and it not only has preferable consistency and upper reliability but lower burden of network and sever, which advance the efficiency of substations and the correctness of formation greatly.