下移5%作为放散线（喘振曲线的调整如图3所示）。当排气压力超过报警线时，系统发出报警信号，操作人员可以进行手动调节;当排气压力值超过放散值时，防喘振调节系统可自动控制，放散阀按一定的角度打开，使工况点回到放散线以下运行，若工况继续恶化，放散阀失电全部打开。防喘振调节系统
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