A combinational method involving variable speed and anti-surge has been used for the flow regulation of a parallel compressor unit. In order to achieve the best operating conditions when parallel operation of natural gas compressor station working in changing condions, this paper focus on how to choose the most reasonable unit operation program. In this work, we have analyzed the relationship between energy consumption and flow distribution ratio of the compressor and derived a theoretical formula for the energy consumption. We also compared the energy consumptions of three different operating schemes, namely where there is reflux in neither of the compressors, in either or in both. Considering the safety of the unit, the most reasonable and feasible scheme is suggested and verified by experiment. When combined with the anti-surge control, the preferred range of each scheme has been identified, which provides guidance for methods of regulating a compressor station.
Key words
compressor in parallel /
anti-surge /
gas reflux /
flow distribution /
operation point /
energy consumption
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