UTILIZATION OF DISTRIBUTED INPUT-OUTPUT TECHNOLOGY IN AUTOMATIC CONTROL SYSTEMS OF COMPRESSOR DEPARTMENT PRODUCTION EQUIPMENT

Abstract

Analysis of automatic control systems (ACS) of gas pumping units (GPU) at compressor departments (CD) of «Kievtransgaz» has been conducted. A typical modern approach to automatic control of main and auxiliary process equipment of compressor stations (CS) on the basis of local automatic control systems has been studied. Peculiarities of decentralized construction of automatic control systems on the basis of standardized Simatic S7 hardware and software have been studied. To ensure uninterrupted power supply of all components of ACS GPU, diagnostic and control functions have been integrated into the system of uninterrupted power supply. Advantages and disadvantages of typical and proposed ACS structures have been specified. A new approach to CS automatic control – a complex centralized automatic control system of the process equipment with distributed input-output (I/O) technology utilization on the basis of redundant   cogrammable logic controllers (PLC) with the functions of the process equipment emergency shutdown has been developed. The functional scheme of automatic control based on the fault-tolerant redundant PLC modules of the control system (in which all the algorithms and mathematical models of the department regulator have been programmed) and industrial optical data communication network via the «double optical loop» layout, which combines individual distributed input-output subsystems has been developed. Perspectives and recommendations concerning organization and introduction of new standardized ACS GPU at the facilities of Ukrainian gas pipeline system (GPS) have been specified on the basis of the obtained results.