Search Results for author: Ognjen Kundacina

Found 10 papers, 3 papers with code

Combining X-Vectors and Bayesian Batch Active Learning: Two-Stage Active Learning Pipeline for Speech Recognition

no code implementations3 May 2024 Ognjen Kundacina, Vladimir Vincan, Dragisa Miskovic

The second stage incorporates a supervised AL strategy, with a batch AL method specifically developed for ASR, aimed at selecting diverse and informative batches of samples.

Active Learning Automatic Speech Recognition +4

Application of Deep Learning Methods in Monitoring and Optimization of Electric Power Systems

no code implementations1 Sep 2023 Ognjen Kundacina

This PhD thesis thoroughly examines the utilization of deep learning techniques as a means to advance the algorithms employed in the monitoring and optimization of electric power systems.

reinforcement-learning

Graph Neural Networks on Factor Graphs for Robust, Fast, and Scalable Linear State Estimation with PMUs

no code implementations28 Apr 2023 Ognjen Kundacina, Mirsad Cosovic, Dragisa Miskovic, Dejan Vukobratovic

As phasor measurement units (PMUs) become more widely used in transmission power systems, a fast state estimation (SE) algorithm that can take advantage of their high sample rates is needed.

Supporting Future Electrical Utilities: Using Deep Learning Methods in EMS and DMS Algorithms

no code implementations1 Mar 2023 Ognjen Kundacina, Gorana Gojic, Mile Mitrovic, Dragisa Miskovic, Dejan Vukobratovic

Electrical power systems are increasing in size, complexity, as well as dynamics due to the growing integration of renewable energy resources, which have sporadic power generation.

energy management Management

Scalability and Sample Efficiency Analysis of Graph Neural Networks for Power System State Estimation

no code implementations28 Feb 2023 Ognjen Kundacina, Gorana Gojic, Mirsad Cosovic, Dragisa Miskovic, Dejan Vukobratovic

Additionally, to evaluate the scalability of the GNN model, we conduct experiments on power systems of various sizes.

GP CC-OPF: Gaussian Process based optimization tool for Chance-Constrained Optimal Power Flow

no code implementations16 Feb 2023 Mile Mitrovic, Ognjen Kundacina, Aleksandr Lukashevich, Petr Vorobev, Vladimir Terzija, Yury Maximov, Deepjyoti Deka

The developed tool presents a novel data-driven approach based on the GP regression model for solving the CC-OPF problem with a trade-off between complexity and accuracy.

Distributed Nonlinear State Estimation in Electric Power Systems using Graph Neural Networks

1 code implementation23 Jul 2022 Ognjen Kundacina, Mirsad Cosovic, Dragisa Miskovic, Dejan Vukobratovic

Nonlinear state estimation (SE), with the goal of estimating complex bus voltages based on all types of measurements available in the power system, is usually solved using the iterative Gauss-Newton method.

Graph Neural Network

Near Real-Time Distributed State Estimation via AI/ML-Empowered 5G Networks

no code implementations22 Jul 2022 Ognjen Kundacina, Miodrag Forcan, Mirsad Cosovic, Darijo Raca, Merim Dzaferagic, Dragisa Miskovic, Mirjana Maksimovic, Dejan Vukobratovic

Firstly, in a tutorial fashion, we present an overview on how distributed SE can be integrated with the elements of the 5G core network and radio access network architecture.

energy management Management

Robust and Fast Data-Driven Power System State Estimator Using Graph Neural Networks

1 code implementation6 Jun 2022 Ognjen Kundacina, Mirsad Cosovic, Dejan Vukobratovic

The power system state estimation (SE) algorithm estimates the complex bus voltages based on the available set of measurements.

State Estimation in Electric Power Systems Leveraging Graph Neural Networks

1 code implementation11 Jan 2022 Ognjen Kundacina, Mirsad Cosovic, Dejan Vukobratovic

The goal of the state estimation (SE) algorithm is to estimate complex bus voltages as state variables based on the available set of measurements in the power system.

Graph Neural Network

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