TEXAS GATHERING SYSTEM'S SCADA EVOLVED OVER 14 YEARS

07/10/1995
Alton MeyerAquila Gas Pipeline Corp.Giddings, Tex. The supervisory control and data acquisition (scada) system along Aquila Gas Pipeline's more than 2,000-mile system evolved without a controlling plan over the last 14 years to become, nonetheless, workable and effective. For 10 years until 1991, a network of dumb remote terminal devices transmitted data to the control center at Giddings via 173 mhz VHF radios. This system was strictly for monitoring the pipeline; there were no remote controls. The old system operated at about 20 bits per see (bps), monitoring 210 points and taking a complete poll in 20 min. Although thi...
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