论文标题
通过协方差矩阵估计惯性估计
Inertia Estimation Through Covariance Matrix
论文作者
论文摘要
这项工作提出了一种基于环境测量值的电力系统惯性的技术。提出的技术利用了这些测量值的协方差矩阵，并解决了适合此类测量的优化问题，该问题适合于同步机经典模型。我们表明，所提出的技术足以准确估算同步机的实际惯性，以及由模拟同步机行为的转换器中间发电机控制器提供的虚拟惯性。我们还表明，所提出的方法能够估计经典同步机模型的等效阻尼。利用此功能来估计网格跟随转换器的下垂，该转换器的摇摆方程等效阻尼具有相似的效果。该技术在IEEE 39总线系统的修改版本以及全岛爱尔兰传输系统的动态1479-BUS模型上进行了全面测试。
This work presents a technique to estimate on-line the inertia of a power system based on ambient measurements. The proposed technique utilizes the covariance matrix of these measurements and solves an optimization problem that fits such measurements to the synchronous machine classical model. We show that the proposed technique is adequate to accurately estimate the actual inertia of synchronous machines and also the virtual inertia provided by the controllers of converter-interfaced generators that emulate the behavior of synchronous machines. We also show that the proposed approach is able to estimate the equivalent damping of the classical synchronous machine model. This feature is exploited to estimate the droop of grid-following converters, which has a similar effect of the swing equation equivalent damping. The technique is comprehensively tested on a modified version of the IEEE 39-bus system as well as on a dynamic 1479-bus model of the all-island Irish transmission system.
