压缩机回流阀自动控制研究

Research on automatic control of compressor return valve

压气站压缩机组加装旁通回流阀对于预防压缩机喘振和延长防喘阀使用寿命具有重要意义,但目前的回流阀只能手动操作,无法实现自动控制,造成压缩机效率低下和资源浪费。深入调研分析回流阀应用现状,通过大量实测数据分析站场每日回流量情况,论证了回流阀自动控制设计的必要性。基于相似原理对设计条件下压缩机特性曲线进行性能换算,得到实际工况下特性曲线;综合考虑进口流量与设定流量的偏差值和偏差变化率对回流阀开度的影响,建立了关于阀门开度的二维模糊控制器,基于MATLAB Simulink软件建立了回流阀控制系统仿真模型。研究结果显示,回流阀的自动控制较人工控制平均回流量减少了6.3%,成果预期节省成本65.36万元/ a。研究方法可为今后压缩机防喘振设计和运行优化提供参考。

The installation of a bypass return valve in the compressor unit of the compressor station is of great significance to prevent compressor surge and prolong the service life of the anti-surge valve. However, the return valve can only be operated manually and cannot be automatically controlled at present, resulting in low efficiency and energy waste. In this paper, the necessity of the automatic control design of the return valve was demonstrated through in-depth investigation of the application status of the return valve and the analysis of the daily return flow based on a large amount of data. The characteristic curve under the actual working conditions was fitted based on similarity conversion. The two-dimensional fuzzy controller for the valve opening was established by comprehensively considering the influence of the deviation between the inlet flow and the set flow and the deviation change rate on the opening of the return valve. Finally, the simulation model of the return valve control system was established based on MATLAB Simulink software. The results show that the average return flow in the automatic control mode is reduced by 6.3% compared with the manual control mode, and the expected cost saving is 653 600 yuan per year. The research methods and results can provide reference for the compressor anti-surge design and operation optimization in the future.