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近年来电力系统发展很快,12.5万kW、30万kW大型汽轮发电机容量已占全国发电设备总容量的40%左右,成为电网主力机组。一旦发生质量事故,引起大面积停电,将造成巨大的经济损失。30万kW机组强迫停机一天,少发电720万kW·h,1kW·h以0.1元计,单电费损失即达72万元,社会产值损失将达21096万元。若能提高发电设备的可靠性,机组每年对“七五”期间12.5万kW、20万kW、30万kW的总装机容量而言,社会产值将少损失数十亿元,因此提高设备固有与运行可靠性有着十分重要的意义。工业产品要求在预定的寿命时期内无故障地正常工作,并满意地完成其功能和任务。产品在规定
In recent years, the power system has been developing rapidly. The capacity of large-scale turbo-generators of 125,000 kW and 300,000 kW accounts for about 40% of the total generating capacity of the country and has become the main power unit of the power grid. In the event of a quality accident, causing a large blackout, will result in huge economic losses. 300,000 kW units forced shutdown one day, less power 7.2 million kW · h, 1kW · h to 0.1 dollars, the loss of single power that is up to 720,000 yuan, the social output value will reach 210.96 million yuan. If the reliability of power generation equipment can be improved, the unit will lose billions of yuan less in social output per year for the total installed capacity of 125,000 kW, 200,000 kW and 300,000 kW during the “Seventh Five-Year Plan” period, thus increasing the equipment inherent and Operational reliability is of great importance. Industrial products require trouble-free normal operation for the intended life of the aircraft and satisfactorily perform their functions and tasks. Products in the provisions