Dynamic Power Network State Estimation with Asynchronous Measurements

Conference · Mon Jan 27 04:00:00 EST 2020

DOI:https://doi.org/10.1109/GlobalSIP45357.2019.8969267· OSTI ID:1602669

Cavraro, Guido ^[1]; Dall'Anese, Emiliano ^[2]; Bernstein, Andrey ^[1]

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1. National Renewable Energy Laboratory (NREL), Golden, CO (United States)
2. University of Colorado

The operation of distribution networks is becoming increasingly volatile, due to fast variations of renewables and, hence, net-loading conditions. To perform a reliable state estimation under these conditions, this paper considers the case where measurements from meters, phasor measurement units, and distributed energy resources are collected and processed in real time to produce estimates of the state at a fast time scale. Streams of measurements collected in real time and at heterogenous rates render the underlying processing asynchronous, and poses severe strains on workhorse state estimation algorithms. In this work, a real-time state estimation algorithm is proposed, where data are processed on the fly. Starting from a regularized least-squares model, and leveraging appropriate linear models, the proposed scheme boils down to a linear dynamical system where the state is updated based on the previous estimate and on the measurement gathered from a few available sensors. The estimation error is shown to be always bounded under mild condition. Numerical simulations are provided to corroborate the analytical findings.

• Research Organization: National Renewable Energy Laboratory (NREL), Golden, CO (United States)
• Sponsoring Organization: USDOE National Renewable Energy Laboratory (NREL), Laboratory Directed Research and Development (LDRD) Program
• DOE Contract Number: AC36-08GO28308
• OSTI ID: 1602669
• Report Number(s): NREL/CP-5D00-76207
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
asynchronous measurements
smart grid
state estimation