OPERATION CONTROL METHOD FOR GAS PIPELINE BOOSTING FACILITY

摘要

PROBLEM TO BE SOLVED: To prevent surge prevention control from being hindered by calculating a recycling start time, a necessary compressor speed and a recycling flowrate, using a flowrate change signal at a gas pipeline demand end, and then operating and controlling a boosting facility on the basis of the calculated values. ;SOLUTION: When a control device receives a gas flowrate change signal from a gas demand end, a recycle start time computation process 101 calculates a time t1 required for a compressor station to become capable of coping with a flowrate change. Furthermore, a compressor speed computation process 102 calculates a compressor speed N1 after the reduction of a gas flowrate and a compressor speed computation process 103 after the lapse of the time t1 finds a compressor speed N2 attainable with a compressor over a time from the beginning of speed reduction to the lapse of the time t1. Then, the larger value of N1 and N2 is selected for use as a set value N for a compressor control device and, then, a difference between a flowrate at an operation point corresponding to N and a flowrate after the reduction is used as a recycling flowrate Q1.;COPYRIGHT: (C)1997,JPO