Method for calculating generated output upper limit of combined heat and power generation unit

The invention discloses a method for calculating the generated output upper limit of a combined heat and power generation unit. The upper limit P of the generated output of the combined heat and powergeneration unit is calculated by utilizing the actual heat supply quantity QL, the expansion efficiency eta, the temperature Tin and the pressure Pin of a water inlet of a boiler, the temperature Tout and the pressure Pout of a steam outlet of the boiler and other numerical values; the calculation result is accurate, the influence caused by low reliability of the maximum power generation output value of the combined heat and power generation unit in the heating period can be eliminated, and the power generation output can be adjusted more accurately and reasonably under the condition that theheat supply effect of the unit is guaranteed. 本发明公开了一种热电联产机组发电出力上限的计算方法，其利用实际供热量Q、膨胀效率η、锅炉进水口的温度T和压力P、以及锅炉蒸汽出口的温度T和压力P等数值来计算热电联产机组的发电出力上限P，计算结果较为准确，不仅可以消除热电联产机组采暖期最大发电出力数值可靠性低造成的影响，而且还可以在保证机组供热效果的情况下，更准确、合理地调节发电出力。