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1问题的提出近几年来，从我国新增加的发电设备来看，无论是国内自行设计制造还是引进的发电机组都在向大容量、高参数发展。这些亚临界或超临界发电机组，在全国各大电网电力生产中已经成为主力机组，这标志着我国的电力发展已接近世界先进水平，同时合理地利用一次源，注重环
1 Issues raised In recent years, from the newly added power generation equipment in China point of view, both domestic self-designed manufacturing or the introduction of generating units are to large-capacity, high-parameter development. These subcritical or supercritical generating units have become the main generating units in the power generation of major power grids throughout the country, which indicates that our country’s power development is approaching the world advanced level, meanwhile utilizing the primary sources rationally and focusing on the ring