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针对河南电网在特定扰动下所产生的功率振荡问题,采用傅里叶变换、小波变换和Prony算法分析了河南电网广域测量系统提供的扰动数据,计算了振荡参数。分析过程和结果显示,各种方法对信号的处理能力和所提供的信息各不相同。在不同的扰动下河南电网均具有较强的阻尼,但被激发的动态特性存在差异。研究分析表明,采用适当的方法,基于WAMS系统的电网动态特性监测和分析可为区分不同的扰动和处理振荡提供丰富的信息。
Aiming at the power oscillation problem caused by Henan power grid under certain disturbance, the disturbance data provided by the wide area measurement system in Henan Power Grid were analyzed by Fourier transform, wavelet transform and Prony algorithm. The oscillation parameters were calculated. The analysis process and results show that the various methods vary in signal processing power and information provided. Under different disturbances, Henan Power Grid has strong damping, but the excited dynamic characteristics are different. The research and analysis show that with the proper method, the dynamic characteristics monitoring and analysis based on WAMS system can provide abundant information for distinguishing different disturbances and dealing with oscillation.