全功率变速抽水蓄能机组水泵模式建模及运行特性研究

Modeling and Operating Characteristics of Variable Speed Pumped Storage Unit with Full-size Converter in Pumping Mode

全功率变速抽水蓄能机组(FSC-VSPSU)能够为电网提供快速、灵活的调节容量,助力新能源为主体的新型电力系统快速发展,其应用逐渐广泛。为掌握实际FSC-VSPSU在水泵工作模式(抽水)时的运行特性,以及分析工程现场所出现的实际问题,建立了FSC-VSPSU水泵模式下的仿真模型。此外,FSC-VSPSU在水泵模式时通常采用直接开度控制方法,对抽水功率无法精确控制,通过外加功率控制环,就能够很好地控制抽水功率,可补充作为机组的另一种控制方法。通过仿真FSC-VSPSU在直接开度控制以及外加功率控制环两种方式下的运行,总结了其运行特性,为实际FSC-VSPSU现场运行提供仿真工具以及运行调试指导。

The variable speed pumped storage unit with full-size converter(FSC-VSPSU)can provide fast and flexible regulation capacity for power grid,assisting the rapid development of new energy dominated power systems,and its application is gradually becoming widespread.In order to grasp the operating characteristics of actual FSC-VSPSU in pumping mode and analyze the actual problems that may occur in engineering site,a simulation model of FSC-VSPSU in pumping mode is established.In addition,FSC-VSPSU usually adopts the direct opening level control in pumping mode,which cannot accurately control the pumping power.Another control method is proposed to use an external power control loop to effectively control the pumping power as the supplementary method for the unit.By simulating the operation of FSC-VSPSU under direct opening level control and external power control loop,the operating characteristics are summarized,which can provide a simulation tool and commissioning guidance for the actual on-site operation of FSC-VSPSU.