Variable speed pumped storage machines are used extensively in wind power plant and pumped storage power plant. This paper presents direct torque and flux control(DTFC) of a variable speed pumped storage power plant(V...Variable speed pumped storage machines are used extensively in wind power plant and pumped storage power plant. This paper presents direct torque and flux control(DTFC) of a variable speed pumped storage power plant(VSPSP). By this method both torque and flux have been applied to control the VSPSP. The comparison between VSPSP's control strategies is studied. At the first, a wind turbine with the capacity 2.2 k W and DTFC control strategies simulated then a 250 MW VSPSP is simulated with all of its parts(including electrical, mechanical, hydraulic and its control system) by MATLAB software. In all of simulations, both converters including two-level voltage source converter(2LVSC) and three-level voltage source converter(3LVSC) are applied. The results of applying 2LVSC and 3LVSC are the rapid dynamic responses with better efficiency, reducing the total harmonic distortion(THD) and ripple of rotor torque and flux.展开更多
为了弥补交流变速抽蓄机组涉网环节的不足,依据我国对大型发电机组并网的技术要求,提出了一种适用于交流变速抽蓄机组的单通道电力系统稳定器(power system stabilizer, PSS)设计方法,同时还给出了变速机组与定速机组的协同响应策略。...为了弥补交流变速抽蓄机组涉网环节的不足,依据我国对大型发电机组并网的技术要求,提出了一种适用于交流变速抽蓄机组的单通道电力系统稳定器(power system stabilizer, PSS)设计方法,同时还给出了变速机组与定速机组的协同响应策略。在励磁系统特性方面,对比分析了变速机组与定速机组的差异,改进了PSS的传递函数结构,提出了相关参数的估算方法,能够适应交流变速抽蓄机组的并网要求。在厂内协调方面,针对变速机组与定速机组的协同控制需求,研究了基于变模态分解技术的协同响应方案,并对比了抽蓄电厂的整体反应效果,能够用于指导首台变速机组投产的工程实际。为了进行仿真分析,搭建了IEEE 9节点系统,并利用真实风电场数据,构建了电网功率扰动场景,验证了所提方法的有效性。展开更多
基金the output of a research project (Title: Application of Doubly Fed Asynchronous machine in Pumped Storage Hydropower Plant in Generate Mode, supported by Islamic Azad University South Tehran Branch)
文摘Variable speed pumped storage machines are used extensively in wind power plant and pumped storage power plant. This paper presents direct torque and flux control(DTFC) of a variable speed pumped storage power plant(VSPSP). By this method both torque and flux have been applied to control the VSPSP. The comparison between VSPSP's control strategies is studied. At the first, a wind turbine with the capacity 2.2 k W and DTFC control strategies simulated then a 250 MW VSPSP is simulated with all of its parts(including electrical, mechanical, hydraulic and its control system) by MATLAB software. In all of simulations, both converters including two-level voltage source converter(2LVSC) and three-level voltage source converter(3LVSC) are applied. The results of applying 2LVSC and 3LVSC are the rapid dynamic responses with better efficiency, reducing the total harmonic distortion(THD) and ripple of rotor torque and flux.
文摘为了弥补交流变速抽蓄机组涉网环节的不足,依据我国对大型发电机组并网的技术要求,提出了一种适用于交流变速抽蓄机组的单通道电力系统稳定器(power system stabilizer, PSS)设计方法,同时还给出了变速机组与定速机组的协同响应策略。在励磁系统特性方面,对比分析了变速机组与定速机组的差异,改进了PSS的传递函数结构,提出了相关参数的估算方法,能够适应交流变速抽蓄机组的并网要求。在厂内协调方面,针对变速机组与定速机组的协同控制需求,研究了基于变模态分解技术的协同响应方案,并对比了抽蓄电厂的整体反应效果,能够用于指导首台变速机组投产的工程实际。为了进行仿真分析,搭建了IEEE 9节点系统,并利用真实风电场数据,构建了电网功率扰动场景,验证了所提方法的有效性。
