论文标题
基于局部测量的稳健电压稳定性指数和电压塌陷开始的识别
Local Measurement Based Robust Voltage Stability Index & Identification of Voltage Collapse Onset
论文作者
论文摘要
本文通过使用局部现场测量值解决了对长期电压不稳定性（LTVI）实时监测的问题。现有的基于本地测量的方法使用对测量中噪声敏感的等效参数估计。为了解决此问题，我们通过将功率流程方程投影为开发局部静态电压稳定性指示器（LS-VSI）来避免使用Thevenin方法，这对于测量噪声是可靠的。提出的方法是实施实施的有吸引力的选择，因为它的分散性质，对噪声的鲁棒性和现实的建模。接下来，我们利用LS-VSI提出一个新的局部动力学-VSI（LD-VSI）来识别由大型干扰触发的LTVI并加载Tap Changer Dynamics。 LD-VSI不仅可以用警报识别不稳定性的发作，还可以识别电压塌陷点（VCP）。将LS-VSI与现有方法进行比较的广泛数值验证在IEEE 30总线和较大的测试系统（如2000-Bus Texas合成网格）上介绍，以验证鲁棒性，准确性和情境意识功能。我们还使用PSSE动态模拟验证了北欧功率网格上的LD-VSI行为。与现有方法相比，我们观察到LD-VSI不仅对测量噪声更健壮，而且可以识别VCP。
This paper addresses the problem of real-time monitoring of long-term voltage instability (LTVI) by using local field measurements. Existing local measurement-based methods use Thevenin equivalent parameter estimation that is sensitive to the noise in measurements. For solving this issue, we avoid the Thevenin approach by projecting the power flow equations as circles to develop local static-voltage stability indicator (LS-VSI) that is robust to measurement noises. The proposed method is an attractive option for practical implementation because of its decentralized nature, robustness to noise, and realistic modeling. Next, we utilize LS-VSI to propose a new local dynamic - VSI (LD-VSI) to identify the LTVI triggered by large disturbances and load tap changer dynamics. LD-VSI can identify not only the onset of instability with an alarm but also the voltage collapse point (VCP). Extensive numerical validation comparing LS-VSI with existing methods is presented on IEEE 30-bus and larger test systems like 2000-bus Texas synthetic grid to validate the robustness, accuracy, and situational awareness feature. We also verify the LD-VSI behavior on the Nordic power grid using PSSE dynamic simulation. When compared to existing methods, we observe that LD-VSI is not only more robust to measurement noise but also can identify VCP.
