介绍了基于GPS全球定位系统和Internet/Intranet实现的便携式负荷预估系统,包括硬件的开发和系统结构。基于此,一种利用残差白噪声的新算法已经成功地用于提取系统的模态信息,即震荡频率和震荡阻尼度的信息。该测量系统已经应用于澳大利亚电力系统,并成功地提取出了系统的震荡信息。分析结果表明,新算法能够完全提取出系统的震荡情况,包括震荡频率和震荡阻尼,并具有较好的稳定性和可靠性。 This paper introduces a portable load forecasting system based on GPS and Internet / Intranet, including hardware development and system architecture. Based on this, a new algorithm using residual white noise has been successfully used to extract the modal information of the system, namely the information of the oscillation frequency and the oscillation damping. The measurement system has been applied to the Australian power system and successfully extracted the system’s turbulence information. The analysis results show that the new algorithm can completely extract the system vibration, including the oscillation frequency and damping, and has good stability and reliability.