考虑避振条件的水风光互补发电系统运行经济性评估

为更加全面、准确评估水电机组在风光水互补发电系统中的经济性表现，本文将水电机组寿命损耗成本纳入机组运行成本，建立以机组运行成本最小、发电量最大、功率负荷偏差最小为目标的风光水互补发电系统经济性评估模型，充分考虑水电机组运行策略的区别，对比机组避振与不避振运行时的系统经济性特征与机组运行特点。基于NSGA-Ⅱ智能优化算法对模型求解，以国内某清洁能源基地为例分析了风光典型出力场景下系统运行经济性。研究结果表明，相比水电机组不避振运行，采用避振运行方式的水风光互补系统虽然发电量和功率与负荷偏差均值分别降低了0.09%(0.02 GWh)和2.10%(1.89 MW)，但运行成本均值下降了0.24%(1.71万元)。综合来看，在发电量未有明显提升的情况下，虽然功率与负荷偏差方面不避振运行方式表现较为优越，但由于机组疲劳损耗导致的运行成本显著增加、机组安全问题突出，其综合经济性表现不如避振运行方式。该研究对于优化水风光互补系统中水电机组的运行方式，提高互补发电系统整体经济效益有一定指导意义。

Operational economic evaluation of hydro-wind-photovoltaic power generation system considering the vibration avoidance strategy

In order to evaluate the economic performance of hydropower units more comprehensively and accurately in the wind-solar-water hybrid power generation system，in this paper the life loss cost of hydropower units is included into the system operating cost，and an economic evaluation model of the target solar-hydro hybrid power generation system is established with the goal of minimum system operating cost，maximum power generation，and minimum power load deviation.Fully considering the differences in the operation strategies of hydropower units，the system economic characteristics and unit operation characteristics of the units under vibration isolation and non-vibration isolation operation are compared.The model is solved based on the NSGA-Ⅱ intelligent optimization algorithm，and the economics of system operation under a typical wind and solar output scenario are analyzed by taking a clean energy base in China as an example.The research results show that，compared with the operation of hydropower units without vibration avoidance，the hydro-wind-solar hybrid system adopting the vibration-avoidance operation mode reduces the average value of power generation and power-load deviation by 0.09% (0.02 GWh) and 2.10% (1.89 MW) respectively，but the average system operating cost decreased by 0.24% (RMB 17，100 yuan).On the whole，in the case of no significant increase in power generation，although the performance of the non-vibration-proof operation mode is superior in terms of power and load deviation，the operating cost due to the fatigue loss of the unit increases significantly，and the safety problem of the unit is prominent，and its comprehensive economic performance is not as good as vibration-proof operation.This research has certain guiding significance for optimizing the operation mode of hydropower units in the hydro-wind hybrid system and improving the overall economic benefits of the hybrid power generation system.