Jul,2023AUTOMATIONINDUSTRY2023年7月石自Vol.59,No.4动油化第59卷化第4期基于压降速率法的恒压控制器设计沈善修（湖北省天然气发展有限公司，湖北武汉437000）摘要：针对天然气行业“背靠背”建设的输气场站，因距离上游和下游场站非常近，出站管道水容积较小，为了解决该类场站的恒压输气的问题，通过对输气时的压力曲线进行分析研究，设计一种以压降速率为依据的恒压控制方法。通过对压力和压降速率的计算和判断，采用步进控制及对关键参数优化，实现了工作调压阀的快速调节。实践结果表明：该方法能够较好地控制输气时的压力，当下游流量发生变化时，阀门能够快速调节，确保压力波动较小，对出口管存小的场站和调压工艺有着较好的适用性。关键词：恒压输气；压降速率控制法；步进式控制；管存；压力偏差控制；零点定理中图分类号：TP273文献标志码：B文章编号：1007-7324（2023)04-0037-04DesignofConstantPressureControllerBasedonPressureDropRateMethodShenShanxiu(HubeiNaturalGasDevelopmentCo.Ltd.,Wuhan,437000,China)Abstracts:Aimingattheback-to-backconstructionofgastransmissionstations,thewatercapacityforthepipelinefortheoutboundislittleduetocloseddistanceofupstreamanddownstreamstationsformanytransportationstations.Tosolvetheproblemofconstantpressuregastransportationinthestations,aconstantpressurecontrolmethodbasedonpressuredroprateisdesignedbyanalyzingthepressurecurveduringgastransportation.Throughthecalculationandjudgmentofpressureandpressuredroprate,therapidadjustmentoftheworkingpressureregulatingvalveisrealizedwithadoptingstep-wisecontrolandoptimizationofkeyparameters.Thepracticalresultsshowthatthemethodcanbettercontrolthepressureduringgastransportation.Whenthedownstreamflowchanges,thevalvecanbequicklyadjustedtoensurethatthepressurefluctuationissmall.Ithasgoodapplicabilitytothestationandpressureregulatingprocesswithsmalloutletpipestorage.Keywords:constantpressuregastransportation;pressuredropratecontrolmethod;step-wisecontrol;pipestorage;pressuredeviationcontrol;zero-pointtheorem伴随着天然气行业的发展进步，越来越多的输气场站采用调度中心控制或者自动控制[1-3}，各燃气管道企业相继实施全自动分输控制改造，并逐步实现了全自动输气...
