The oscillations in a power system can be categorized into free oscillations and forced oscillations. Many algorithms have been developed to estimate the modes of free oscillations in a power system. Recently, forced ...The oscillations in a power system can be categorized into free oscillations and forced oscillations. Many algorithms have been developed to estimate the modes of free oscillations in a power system. Recently, forced oscillations have caught many researchers’ attentions.Techniques are proposed to detect forced oscillations and locate their sources. In addition, forced oscillations may have a negative impact on the estimation of mode and mode-shape if they are not properly accounted for. To improve the power system reliability and dynamic properties, it is important to first distinguish forced oscillations from free oscillations and then locate the sources of forced oscillations in a timely manner. The negative impact of forced oscillation can be mitigated when they are detected and located. This paper provides an overview of the analysis technique of forced oscillations in power systems. In addition, some future opportunities are discussed in forced oscillation studies.展开更多
未来电动汽车(plug-in electric vehicle,PEV)的大规模接入,将给电力系统规划和运行带来不可忽视的影响。从电动汽车充电负荷建模与仿真计算、电动汽车接入对电力系统的影响、电动汽车的充放电控制与利用3大方面,讨论电动汽车接入电网...未来电动汽车(plug-in electric vehicle,PEV)的大规模接入,将给电力系统规划和运行带来不可忽视的影响。从电动汽车充电负荷建模与仿真计算、电动汽车接入对电力系统的影响、电动汽车的充放电控制与利用3大方面,讨论电动汽车接入电网的研究现状。指出电动汽车充电负荷分析应考虑的主要因素;总结电动汽车接入对电源发展、电网运行、充电设施与配电网规划方面的影响,并分析电动汽车有序充电及与电网互动(vehicle to grid,V2G)的研究现状和应用难点。最后,对今后的研究方向进行讨论。展开更多
基金supported by the funding from State University of New York
文摘The oscillations in a power system can be categorized into free oscillations and forced oscillations. Many algorithms have been developed to estimate the modes of free oscillations in a power system. Recently, forced oscillations have caught many researchers’ attentions.Techniques are proposed to detect forced oscillations and locate their sources. In addition, forced oscillations may have a negative impact on the estimation of mode and mode-shape if they are not properly accounted for. To improve the power system reliability and dynamic properties, it is important to first distinguish forced oscillations from free oscillations and then locate the sources of forced oscillations in a timely manner. The negative impact of forced oscillation can be mitigated when they are detected and located. This paper provides an overview of the analysis technique of forced oscillations in power systems. In addition, some future opportunities are discussed in forced oscillation studies.
文摘未来电动汽车(plug-in electric vehicle,PEV)的大规模接入,将给电力系统规划和运行带来不可忽视的影响。从电动汽车充电负荷建模与仿真计算、电动汽车接入对电力系统的影响、电动汽车的充放电控制与利用3大方面,讨论电动汽车接入电网的研究现状。指出电动汽车充电负荷分析应考虑的主要因素;总结电动汽车接入对电源发展、电网运行、充电设施与配电网规划方面的影响,并分析电动汽车有序充电及与电网互动(vehicle to grid,V2G)的研究现状和应用难点。最后,对今后的研究方向进行讨论。
