多能互补发电系统抽水蓄能模型及运行策略

根据多能互补发电系统的特点和作用,建立了系统中抽水蓄能的数学模型,提出了系统中抽水蓄能的运行策略,即按给定负荷运行,具体在本系统中即为按系统净负荷运行．由此提出系统中抽水蓄能的控制方式.当系统净负荷大于0时,抽水蓄能机组运行在水轮机工况,分3种情况:当系统净负荷小于水轮机工况的启动功率时,抽水蓄能机组不运行;当系统净负荷大于水轮机工况的启动功率而小于水轮机工况的额定功率时,抽水蓄能机组按净负荷功率运行在水轮机工况;当系统净负荷小于水轮机的额定功率时,抽水蓄能机组按水轮机工况的额定功率运行．当系统净负荷小于0时,抽水蓄能机组运行在水泵工况,分2种情况:当系统净负荷小于水泵工况的额定功率时,抽水蓄能机组不运行;当系统净负荷大于水泵工况的额定功率时,抽水蓄能机组按水泵工况的额定功率运行．

Model and operation strategy of pumped-storage in hybrid power system

Based on the characteristics of hybrid power system, a mathematical model of pumped sto rage was established. According to its function, the pumped storage operation strategy was put forward, that is, to operate as per given load and specifically in the hybrid wind PV pumped storage system, to operate as per net load. A control model of pumped storage was accordingly proposed: as the net load was greater than zero, the pumped storage unit operated under the turbine operating conditions could be classified into three situations. Firstly, as net load was less than the starting power of turbine, pumped storage units were not operating. Secondly, as net load was greater than the starting power and less than the rated power of turbine, pumped storage units were operating at the turbine condition as net load power. Thirdly, as net load was less than the rated power of turbine, pumped storage units were operating as the rated power of turbine. When net load was less than zero, pumped storage units operated under the pump operating conditions could be classified into two situations. Firstly, as net load was less than the rated power of pump, pumped storage units were not operating. Secondly, as net load was greater than the rated power of pump, pumped storage units were operating as the rated power of pump.