大桥河二级水电站增效扩容机组出力不足复核

Review on Insufficient Output of Efficiency-enhancing and Capacity-expanding Unit in Daqiaohe II Hydropower Station

大桥河二级水电站增效扩容技改投产以来,双机并列运行无法带至额定功率,极大影响机组运行的经济性。为了分析机组出力不足原因,联合机组出力关联性函数,从流量、水头等方面对机组参数进行详细论证复核。分析结果表明双机组运行条件下,机组发电净水头远低于额定水头,运行点偏离设计最优运行工作区是导致机组出力不足的主要原因。分析结果对电站后期整改有参考价值和指导意义。

Since the technical renovation of efficiency enlargement and capacity enlargement for Daqiaohe II Hydropower Station put into operation,the two-unit parallel operation can not reach the rated power,which greatly affects the economy of unit operation.In order to analyze the cause of insufficient unit output and output correlation function of combined unit,this paper demonstrates and reviews unit parameters in detail from flow rate,head,etc.The result shows that under the condition of two-unit operation,the net head of power generation of the unit is much lower than the rated head.The deviation of operating point from the designed optimum operating area is the main reason for insufficient unit output.The analysis results have reference value and guiding significance for the later rectification of power plant.