METHOD AND SYSTEM FOR CONTROLLING A VARIABLE-GEOMETRY COMPRESSOR

The invention relates to a method and a system for controlling a variable-geometry compressor. A method for controlling a VG mechanism for a compressor employs a predefined VG setpoint map comprisingoptimum VG setpoints for the VG mechanism based on at least one predefined optimization criterion. The VG mechanism has at least three different setpoints ranging between a minimum flow area setpointand a maximum flow area setpoint. A location of an operating point of the compressor on its compressor map is determined. Based on the location of the operating point, the VG setpoint map is consultedand an optimum VG setpoint is determined. A predictive scheme can be included for accounting for time lag of the VG mechanism's response. 本发明涉及用于控制可变几何结构压缩机的方法和系统。具体公开了一种用于控制压缩机的VG机构的方法，其采用预先确定的VG设定点图，预先确定的VG设定点图包括基于至少一个预先确定的优化判据的VG机构的最佳VG设定点。VG机构具有范围在最小流动面积设定点和最大流动面积设定点之间的至少三个不同的设定点。确定压缩机的操作点在其压缩机图上的位置。基于操作点的位置，查阅VG设定点图并确定最佳VG设定点。可以包括预测方案以考虑到VG机构的响应的时滞。