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
结合某600 MW机组高压厂用变压器出厂试验数据,以及6 k V母线所接异步电动机参数,分别应用等效电压源法和传统方法,计算6 k V母线三相短路电流初始值,并对两种计算结果进行比较,计算中假定高压厂用变压器高压侧馈电网络阻抗为零。应用...结合某600 MW机组高压厂用变压器出厂试验数据,以及6 k V母线所接异步电动机参数,分别应用等效电压源法和传统方法,计算6 k V母线三相短路电流初始值,并对两种计算结果进行比较,计算中假定高压厂用变压器高压侧馈电网络阻抗为零。应用等效电压源法计算由厂用电源支路提供的短路电流,其平均值与采用传统方法的计算结果非常接近。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.
文摘结合某600 MW机组高压厂用变压器出厂试验数据,以及6 k V母线所接异步电动机参数,分别应用等效电压源法和传统方法,计算6 k V母线三相短路电流初始值,并对两种计算结果进行比较,计算中假定高压厂用变压器高压侧馈电网络阻抗为零。应用等效电压源法计算由厂用电源支路提供的短路电流,其平均值与采用传统方法的计算结果非常接近。
