Below a noise-to-observability threshold, spectral initialization recovers power-system voltage angles to first-order accuracy and a zero-duality-gap certificate verifies the unique WLS solution.
Observability in the state estimation of power systems,
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Spectral Initialization and Certification for Power System Angle Estimation
Below a noise-to-observability threshold, spectral initialization recovers power-system voltage angles to first-order accuracy and a zero-duality-gap certificate verifies the unique WLS solution.