Due to the variable output of renewable energy (RE) generation, difficulties of dispatching RE for power system operators could not be avoided. One of possible solutions is the energy storage technology, especially th...Due to the variable output of renewable energy (RE) generation, difficulties of dispatching RE for power system operators could not be avoided. One of possible solutions is the energy storage technology, especially the battery storage system. The large-scale energy storage system is available to support power system reliable flexibility for load following and system frequency regulation. In this paper, the bottlenecks of large-scale solar power generation dispatching and operation in Qinghai grid are discussed, and a new PV-energy storage coordinated dispatching method is proposed for reduction of PV curtailment in Qinghai. Moreover, the validation based on the time-series production simulation is provided using real data from Qinghai. The results indicate that the proposed method can effectively decrease the curtailment of solar power and future vision of large-scale solar power coordinated operation with energy storage system is also presented.展开更多
为满足内燃-直线发电集成动力系统(Internal Combustion-Linear Generator Integrated Power System,ICLGIPS)能量的双向高效流动要求,提出了一种储能系统,采用超级电容器组串并联切换技术和优化设计的双向DC-DC功率变换器(Bi-direction...为满足内燃-直线发电集成动力系统(Internal Combustion-Linear Generator Integrated Power System,ICLGIPS)能量的双向高效流动要求,提出了一种储能系统,采用超级电容器组串并联切换技术和优化设计的双向DC-DC功率变换器(Bi-directional DC-DC Power Converter,BDPC)相结合,实现了低电压值等级电源供电的可变电压系统的设计理念,电源电压和系统电压可以独立变化,使得系统电压可随不同动力装置的需要而改变。新系统可实现双向升、降压变换四种模式的能量控制策略,大大增加了电机的调速范围和可实现能量回馈的速度范围。利用超级电容器组串并联切换技术,实现了电压大范围变化条件下的BDPC的电压比被控制在理想范围内,提高了功率变换和传输的效率。仿真结果和部分实验结果验证了新系统设计的正确性和控制策略的有效性,能量流效率较好地满足了系统的要求。展开更多
文摘Due to the variable output of renewable energy (RE) generation, difficulties of dispatching RE for power system operators could not be avoided. One of possible solutions is the energy storage technology, especially the battery storage system. The large-scale energy storage system is available to support power system reliable flexibility for load following and system frequency regulation. In this paper, the bottlenecks of large-scale solar power generation dispatching and operation in Qinghai grid are discussed, and a new PV-energy storage coordinated dispatching method is proposed for reduction of PV curtailment in Qinghai. Moreover, the validation based on the time-series production simulation is provided using real data from Qinghai. The results indicate that the proposed method can effectively decrease the curtailment of solar power and future vision of large-scale solar power coordinated operation with energy storage system is also presented.
文摘为满足内燃-直线发电集成动力系统(Internal Combustion-Linear Generator Integrated Power System,ICLGIPS)能量的双向高效流动要求,提出了一种储能系统,采用超级电容器组串并联切换技术和优化设计的双向DC-DC功率变换器(Bi-directional DC-DC Power Converter,BDPC)相结合,实现了低电压值等级电源供电的可变电压系统的设计理念,电源电压和系统电压可以独立变化,使得系统电压可随不同动力装置的需要而改变。新系统可实现双向升、降压变换四种模式的能量控制策略,大大增加了电机的调速范围和可实现能量回馈的速度范围。利用超级电容器组串并联切换技术,实现了电压大范围变化条件下的BDPC的电压比被控制在理想范围内,提高了功率变换和传输的效率。仿真结果和部分实验结果验证了新系统设计的正确性和控制策略的有效性,能量流效率较好地满足了系统的要求。
