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A measurement-based approach for power system instability early warning

机译:基于测量的电力系统不稳定预警方法

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Early warning of impending instability in a power system under disturbance conditions is important for preventing of system collapse. A measurement-based approach is proposed to assess the potential power system transient instability problem under cascading outages. Where a measurement-based index is obtained as the estimation accuracy of a linear autoregressive exogenous (ARX) model to estimate the dynamic response of the power system and indicate the system stability to some extent after a disturbance. The proposed approach was verified using a set of marginally stable cases in a 179-bus WECC equivalent power system. Then the instability early warning threshold for this system is obtained as 0.44.
机译:在扰动条件下电力系统即将发生不稳定的预警对于防止系统崩溃很重要。提出了一种基于测量的方法来评估级联中断下潜在的电力系统暂态不稳定性问题。获得基于测量的指标作为线性自回归外生(ARX)模型的估计精度,以估计电力系统的动态响应并在出现干扰后在一定程度上指示系统稳定性。在179总线WECC等效电力系统中,使用一组微弱稳定的情况对提出的方法进行了验证。然后获得该系统的不稳定预警阈值为0.44。

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