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基于WAMS的电力系统功率振荡分析与振荡源定位(2)力矩分解法

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Keywords: 电力系统,低频振荡,振荡源,广域量测系统,力矩分解,模型参数校核

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Abstract:

电力系统低频振荡诊断与紧急控制要求及时快速地识别扰动源,振荡的分析与在线计算要求采用准确的模型参数。针对以上问题,提出了基于力矩分解法的扰动源定位与参数实时校核方案。该方案采用力矩分解法分析发电机控制系统的作用,通过计算振荡能量直观地显现电网振荡时各控制系统对电网阻尼的影响。采用力矩分解的方法,可以将扰动源进一步精确定位至发电机的控制系统,并可实时校核在线计算数据中控制系统的模型参数。最后,通过实际电网振荡实例的分析验证了该方法的有效性;分析结果表明,该方法可以快速准确地定位振荡源,识别发电机控制系统异常,并在线校核发电机控制系统模型参数。

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