重型燃气轮机离线水洗周期经济性优化模型与应用

Economic Optimization Model and Application of Off-line Washing Period for Heavy-duty Gas Turbine

压气机离线水洗可以消除积垢劣化、提升机组性能,离线水洗周期对电厂运行收益具有显著影响.提出了燃气轮机离线水洗周期经济性分析的方法和模型,以周期平均水洗成本作为优化指标,给出了最优离线水洗周期建议.基于该模型,以海南某机组为研究对象,计算该机组的最优离线水洗周期,并对各项边界条件进行了敏感度分析.结果表明:该机组的最优离线水洗周期约为740h,相比于实际运行操作的550和1200h,每年可以多盈利8.4万~18万元.燃料价格、上网电价、压气机积垢速率均对最优水洗周期有显著影响.该模型已在电厂得到应用,研究结果可以为其他燃气轮机电厂的压气机离线水洗周期决策提供参考.

Off-line washing of compressor can eliminate the scale deterioration and improve the unit performance,and the off-line washing period has a significant impact on power plant operation income.An economic analysis method and model of gas turbine off-line washing period was presented.The average washing cost of period was taken as the optimization index,and the optimal off-line washing period was proposed.Based on the model,the optimal off-line washing period of the unit in Hainan Province was calculated,and the sensitivity of each boundary condition was analyzed.Results show that,the optimal off-line washing period for the unit is approximately 740 h,which can increase the profit by 84000-180000 yuan per year compared with the actual operation of 550 and 1200 h.Factors such as fuel price,on-grid price,and compressor scaling rate all have significant impacts on the optimal washing period.The model has been applied in power plant,and the research results can provide a reference for the off-line washing period decision of other gas turbine power plant compressor.