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arXiv · 1903.08956

Distributed State Estimation for AC Power Systems using Gauss-Newton ALADIN

Xu Du·Alexander Engelmann·Yuning Jiang·Timm Faulwasser·Boris Houska
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Abstract

This paper proposes a structure exploiting algorithm for solving non-convex power system state estimation problems in distributed fashion. Because the power flow equations in large electrical grid networks are non-convex equality constraints, we develop a tailored state estimator based on Augmented Lagrangian Alternating Direction Inexact Newton (ALADIN) method, which can handle the nonlinearities efficiently. Here, our focus is on using Gauss-Newton Hessian approximations within ALADIN in order to arrive at at an efficient (computationally and communicationally) variant of ALADIN for network maximum likelihood estimation problems. Analyzing the IEEE 30-Bus system we illustrate how the proposed algorithm can be used to solve highly non-trivial network state estimation problems. We also compare the method with existing distributed parameter estimation codes in order to illustrate its performance.

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Xu Du, Alexander Engelmann, Yuning Jiang, Timm Faulwasser, Boris Houska. 2019-03-21. Distributed State Estimation for AC Power Systems using Gauss-Newton ALADIN. https://arxiv.org/abs/1903.08956

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