As a important power source of thermal power plant,air compressor is the major power user during normal operation. The running economy of compressor gains its attention as the generalization of energy saving policy and increasing demand for compressor capacity by thermal power unit. This paper shows a comprehensive analysis of compressor frequency conversion operation in some project, provides suggestion for project design.%空压机设备是火力发电厂重要的动力源，也是电厂正常运行中较大的耗电用户，随着国家的节能政策推广和大型火力发电机组对空压机容量需求的增大，空压机设备的运行经济性也被越来越重视。本文以某工程为例对空压机采用变频运行方式进行了综合性分析，为今后类似工程设计和设备选择提供参考意见。
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