Design And Research On AC Variable Frequency Rig Electrical System Based On Fieldbus

With the rapid development of micro electric technology,computer technology and communication technology, industrial control system is always transformed. At the same time, as the important composition of the control system, industrial communication network is developed constantly.Enterprise automatic technology requires more information applied to factory administration,aiming at integration of administration and control. Information exchange domain cover with from the scene equipment to control and supervise, from workshop section,plant factory,enterprise to the market in the world. As the basis of factory digital communication network, fieldbus establishes relation between production process with control equipment and control administration , and makes enterprise synthesis automatic system based on industrial control network formed gradually.With the rapid development of information network technology and the maturity of correlated technology, oil rig's control system is impacted greatly and developed from traditional relay control system to the control system that integrates control network and information network.Based itself on international market,the subject researchs and designs electrical system of AC variable frequency rig based on Profibus fieldbus, which meets the requirement of deep well technology and special artesian well technics. Rig's power control system and variable frequency timing control system applies advanced digital network control technology, possessing outstanding capability of timing, overload, reliability and anti-jamming. Digital operation control system of rig is realized through toucher, industrial computer ,PLC and centeral communication, which gathers artesian drilling well and electric parameter, and converts into digital signal and digital operation function to meet display,storage,print,remote watch and administration.